NO814234L

NO814234L - BRIDGE HOLE VALVE.

Info

Publication number: NO814234L
Application number: NO814234A
Authority: NO
Inventors: Gary Allen Cohn
Original assignee: Otis Eng Co
Priority date: 1981-03-16
Filing date: 1981-12-11
Publication date: 1982-09-17
Also published as: CA1170982A; GB2094861A

Description

Oppfinnelsen vedrører brønnhullventiler, særlig for bruk i olje- og gassbrønner, og mer særskilt vedrører oppfinnelsen et brønnhullventil-system for styring av en fluidumstrøm i ringrommet i en brønn. The invention relates to downhole valves, particularly for use in oil and gas wells, and more particularly the invention relates to a downhole valve system for controlling a fluid flow in the annulus in a well.

Olje- og gassbrønner blir vanligvis komplettert med en eller flere foringsrørstrenger i brønnhullet og en produksjons-rør-streng som plasseres i foringsrøret, konsentrisk i dette, slik at det derved dannes en sentral strømningspassasje i rørstrengen og et ringrom mellom rørstrengen og foringens innervegg. Når en slik brønn benyttes i én enkelt produksjonsformasjon er det mulig å få produksjon av brønnen gjennom såvel rørstrengen som ringrommet. Ofte blir en slik brønn klargjort for produksjon fra to soner, hvorav den ene produseres gjennom rørstrengen mens den andre produseres gjennom ringrommet, idet man derved unngår sammenblanding av fluidene fra de to separate soner. Oil and gas wells are usually completed with one or more casing strings in the wellbore and a production pipe string which is placed in the casing, concentrically in it, so that a central flow passage is formed in the pipe string and an annulus between the pipe string and the inner wall of the casing. When such a well is used in a single production formation, it is possible to obtain production from the well through both the pipe string and the annulus. Often such a well is prepared for production from two zones, one of which is produced through the pipe string while the other is produced through the annulus, thereby avoiding mixing of the fluids from the two separate zones.

Ved en slik installasjon plasseres en brønnhullpakning rundt rørstrengen og stenger ringrommet på et sted mellom henholdsvis øvre og nedre produksjonsformasjon. Av sikkerhetshensyn utgjør underjordiske sikkerhetsventiler en del av brønn-kompletterings-systemet. En rør-sikkerhetsventil styrer strømmen i rørstrengen, mens en ringrom, sikkerhetsventil styrer strømmen i ringrommet. Slike ventiler plasseres dypt nok i brønnen til å kunne beskytte brønnen mot fluidumtap og mot mulige branner i tilfelle av ,skade på brønnhodet ved overflaten. En ringrom-sikkerhetsventil innbefatter utstyr som tilveiebringer en ringformet strømnings-passasje gjennom boringen i brønnpakningen, slik at fluider kan gå forbi pakningen i ringrommet rundt rørstrengen. I de idag tilgjengelige ringrom-sikkerhetsventil-systemer er pakningenjog andre ventilkomponenter som inngår i fjernbare deler av ringromventilen, utvendig tilgjengelige deler som kan skades under nedføring og opptrekking av ventilen og som kan strømningskap<p>es under åpning og lukking av ventilen i brønnen. Ide eksisterende systemer er videre den ringformede strømningspassasje langs5brønnpakningen vanligvis åpen, slik at deler av systemet derfor er tilgjengelige når ringrom-ventilen ikke er på plass i brønnen. Noen av de eksisterende systemer benytter også en kombinert kule- og hylseventil med samhørende konstruksjon og drift. In such an installation, a wellbore seal is placed around the pipe string and closes the annulus at a location between the upper and lower production formation respectively. For safety reasons, underground safety valves form part of the well completion system. A pipe safety valve controls the flow in the pipe string, while an annulus safety valve controls the flow in the annulus. Such valves are placed deep enough in the well to be able to protect the well against fluid loss and against possible fires in the event of damage to the wellhead at the surface. An annulus safety valve includes equipment that provides an annular flow passage through the bore in the well packing, so that fluids can bypass the packing in the annulus around the tubing string. In the annulus safety valve systems available today, the gasket and other valve components that are part of removable parts of the annulus valve are externally accessible parts that can be damaged during lowering and pulling up of the valve and that can be blocked during opening and closing of the valve in the well. Furthermore, in existing systems, the annular flow passage along the well packing is usually open, so that parts of the system are therefore accessible when the annulus valve is not in place in the well. Some of the existing systems also use a combined ball and socket valve with coherent construction and operation.

Det er en vesentlig hensikt med foreliggende oppfinnelse å tilveiebringe en ny og forbedret brønnhullventil. It is an essential purpose of the present invention to provide a new and improved wellbore valve.

Nok en hensikt med oppfinnelsen er å tilveiebringe en ny og forbedret brønnhullventil for styring av strømninger i ringrommet i en brønn. Another purpose of the invention is to provide a new and improved wellbore valve for controlling flows in the annulus in a well.

Nok en hensikt med oppfinnelsen er å tilveiebringe et nyttAnother object of the invention is to provide a new

og forbedret brønnhullventil-system som innbefatter separate, uavhengige strømningsstyreventiler for henholdsvis rør og ringrom. and improved wellbore valve system that includes separate, independent flow control valves for pipe and annulus respectively.

Nok en hensikt med oppfinnelsen er å tilveiebringe en ringrom-sikkerhetsventil for brønner, innbefattende innvendige bevegbare deler og pakninger som er upåvirket av nedføring og opptrekking av ventilen. Another purpose of the invention is to provide an annulus safety valve for wells, including internal movable parts and gaskets which are unaffected by lowering and pulling up of the valve.

Nok en hensikt med oppfinnelsen er å tilveiebringe en ringrom-ventil for en brønn, hvor hovedpakningene er stasjonære etter at ventilen er montert i brønnhullet. Another purpose of the invention is to provide an annulus valve for a well, where the main packings are stationary after the valve is mounted in the wellbore.

Nok en hensikt med oppfinnelsen er å tilveiebringe et ringrom-sikkerhetsventil-system for komplettering av en brønn, innbefattende øvre og nedre hylseventil-arrangementer for styring av strømmen inn i ringrom-strømningspassasjen i systemet forbi brønnhullpakningen, idet hylseventilen er lukket når ringrom-ventilen ikke er i arbeidsstilling i brønnen og er åpen når ringrom-ventilen er montert i brønnen. Still another object of the invention is to provide an annulus relief valve system for completing a well, including upper and lower sleeve valve arrangements for controlling the flow into the annulus flow passage in the system past the wellbore packing, the sleeve valve being closed when the annulus valve is not is in working position in the well and is open when the annulus valve is fitted in the well.

Nok en hensikt med oppfinnelsen er å tilveiebringe et ringrom-sikkerhetsventil-system for en brønn, hvor ringrom-strømnings-passasjen langs brønnhullpakningen er lukket når sikkerhetsventilen ikke er i arbeidsstilling i brønnen. Another purpose of the invention is to provide an annulus safety valve system for a well, where the annulus flow passage along the wellbore packing is closed when the safety valve is not in working position in the well.

Nok en hensikt med oppfinnelsen er å tilveiebringe en ny og forbedret glidehylseventil for et brønnhull, Another object of the invention is to provide a new and improved slide sleeve valve for a wellbore,

I samsvar med oppfinnelsen er det tilveiebragt en brønnhull-ringrom-sikkerhetsventil som innbefatter et i lengderetningen bevegbart rørformet ventillegeme som er plassert konsentrisk inne i et rørformet hus hvorved det dannes en ringformet strømningspassasje langs ventillegemet inne i huset, mellom i lengderetningen avstandsplasserte porter i huset, idet det forefinnes fjærer som virker mellom huset og ventillegemet for å presse ventillegemet til lukket stilling, mens et hydraulisk stempel mellom ventillegemet og huset virker for pressing av ventillegemet til åpning i samsvar med det hydrauliske fluidumtrykk som foreligger. I huset er det plassert avstandsplasserte utvendige ringpakninger for tilveiebringelse av tetning mellom huset og et brønnhull-rørsystem som innbefatter en brønnhullpakning, en låse/kjernedel tilknyttet den ene enden av huset for frigjørbar låsing av ringrom-ventilen ved en landingsnippel i brønnhull-rørsystemet, og en kileut-rustning langs den andre enden av huset for åpning og lukking av hylseventilene langs brønnhull-rørsystemet under installasjon og fjerning av ringrom-ventilen. Videre er, i samsvar med oppfinnelsen, ringrom-sikkerhetsventilen betjenbar i kombina-sjon med et brønnhull-kompletteringssystem som innbefatter In accordance with the invention, a wellbore annulus safety valve is provided which includes a longitudinally movable tubular valve body which is placed concentrically inside a tubular housing whereby an annular flow passage is formed along the valve body inside the housing, between longitudinally spaced ports in the housing, in that there are springs that act between the housing and the valve body to press the valve body to a closed position, while a hydraulic piston between the valve body and the body acts to press the valve body to open in accordance with the available hydraulic fluid pressure. Displaced in the housing are spaced external annular seals for providing a seal between the housing and a wellbore piping system that includes a wellbore gasket, a locking/core member associated with one end of the housing for releasably locking the annulus valve at a landing nipple in the wellbore piping system, and a wedge fitting along the other end of the housing for opening and closing the sleeve valves along the wellbore piping system during installation and removal of the annulus valve. Furthermore, in accordance with the invention, the annulus safety valve is operable in combination with a wellbore completion system which includes

;en brønnhullpakning forbundet med brønnhullrøret, en øvre hylseventil som er forbundet med brønnhullrøret over pakningen og en nedre hylseventil som er forbundet med brønnhullrøret under pakningen. Ringrom-sikkerhetsventilhuset og brønnpakning-en danner sammen med øvre og nedre hylseventiler en ringformet )strømningspassasje langs pakningen for forbiføring av ringromfluidum forbi pakningen, mellom øvre og nedre hylseventiler. Når ringrom-sikkerhetsventilen er montert mellom pakningene ;a wellbore gasket connected to the wellbore pipe, an upper sleeve valve that is connected to the wellbore pipe above the gasket and a lower sleeve valve that is connected to the wellbore pipe below the gasket. The annulus safety valve housing and the well packing together with the upper and lower sleeve valves form an annular flow passage along the packing for passing annulus fluid past the packing, between the upper and lower sleeve valves. When the annulus safety valve is fitted between the gaskets

og øvre og nedre hylseventiler, vil pakningen langs ringrom-sikkerhetsventilhuset forbli fiksert under operasjon av ventil-5 legemet i ringrom-sikkerhetsventilen. De øvre og nedre hylseventiler åpnes og lukkes ved installasjon og fjerning av ringrom-sikkerhetsventilen, slik at hylseventilene er åpne når and upper and lower sleeve valves, the gasket along the annulus safety valve body will remain fixed during operation of the valve body in the annulus safety valve. The upper and lower sleeve valves open and close when installing and removing the annulus safety valve, so that the sleeve valves are open when

sikkerhetsventilene er i operativ stilling, og er lukket når ringrom-sikkerhetsventilen fjernes fra rørstreng-systemet. the safety valves are in the operational position, and are closed when the annulus safety valve is removed from the pipe string system.

I samsvar med oppfinnelsen er det også tilveiebragt en rør-streng/glidehylseventil med en pakningsbeskyttende tildekning som betjenes av et enkelt sett med knaster. In accordance with the invention, there is also provided a pipe string/sliding sleeve valve with a gasket protecting cover which is operated by a single set of knobs.

Oppfinnelsen skal beskrives nærmere under henvisning til tegningene hvor fig. The invention shall be described in more detail with reference to the drawings where fig.

fig. IA og B sammen viser et skjematisk-lengdesnitt gjennom en brønnhullboring komplettert med utstyret ifølge oppfinnelsen, fig. IA and B together show a schematic longitudinal section through a wellbore drilling completed with the equipment according to the invention,

fig. 2A - 2H danner et lengdesnitt gjennom utstyret ifølge oppfinnelsen, med sikkerhetsventilen lukket og hylseventilene i rørstrengsystemet åpne, og fig. 2A - 2H form a longitudinal section through the equipment according to the invention, with the safety valve closed and the sleeve valves in the pipe string system open, and

fig. 3A - 3H viser et lengdesnitt gjennom utstyret i fig.2A-2H fig. 3A - 3H show a longitudinal section through the equipment in fig. 2A - 2H

med ringrom-sikkerhetsventilen åpen og glidehylseventilene i rørstrengsystemet å<p>ne. with the annulus safety valve open and the slide sleeve valves in the pipe string system open.

Som vist i fig. 1A-1B er brønnhullboring 10 boret i en grunn-formasjon 11 ned til ønsket dybde, idet boringen gjennomtrenger én eller flere olje- og/eller gassproduserende formasjoner. Brønnhullboringen er foret med foringsrør, herunder det øvre foringsrør 12, og er sementert, som vist ved 13, mot brønn-hullsboringens omgivne vegg. Et andre foringsrør 14 henger inne i det øvre foringsrør og strekker seg ned til ønsket dybde, under det øvre foringsrør, i samsvar med vanlig brønn-ihulls-kompletterings-teknikk. Et brønnhode 15 er montert på de øvre ender av foringsrørene 12 og 14. Brønnhodet 15 er As shown in fig. 1A-1B, wellbore drilling 10 is drilled in a base formation 11 down to the desired depth, the drilling penetrating one or more oil and/or gas producing formations. The wellbore is lined with casing, including the upper casing 12, and is cemented, as shown at 13, against the surrounding wall of the wellbore. A second casing 14 hangs inside the upper casing and extends down to the desired depth, below the upper casing, in accordance with the usual well-in-hole completion technique. A wellhead 15 is mounted on the upper ends of the casings 12 and 14. The wellhead 15 is

et egnet standard brønnhode som inneholder de nødvendige strøm-ningsstyreventiler og tilhørende utstyr (ikke vist) for styring av strømninger i rørstrengen og i ringrommet mellom rørstrengen;og foringsrøret i brønnhullet. En rørstreng 20 er opphengt i a suitable standard wellhead containing the necessary flow control valves and associated equipment (not shown) for controlling flows in the pipe string and in the annulus between the pipe string and the casing in the wellbore. A pipe string 20 is suspended in

brønnhullboringen ifra brønnhodet, med en avstand i forhold til innerveggen i f6ringsrøret 14, slik at det inne i foringsrøret the wellbore from the wellhead, at a distance in relation to the inner wall of the casing 14, so that inside the casing

dannes et ringrom 21 som strekker seg ned i brønnen og er beregnet for fluidumstrømninger som styres ved hjelp av ringrom-sikkerhetsventilen ifølge oppfinnelsen. En åpning 22 i brønn-hodet fører inn til ringrommet 21. Brønnhodet er videre forsynt med en hydraulisk styreledning 23 som strekker seg ned i brønnhullet til en rør-sikkerhetsventil som kan være installert an annulus 21 is formed which extends down into the well and is intended for fluid flows which are controlled by means of the annulus safety valve according to the invention. An opening 22 in the wellhead leads into the annulus 21. The wellhead is further provided with a hydraulic control line 23 which extends down into the wellbore to a pipe safety valve which can be installed

i rørstrengen. På lignende måte er en hydraulisk fluidum-styreledning 2 4 ført ned igjennom brønnhodet og videre ned i brønnen, for betjening av ringrom-sikkerhetsventilen ifølge oppfinnelsen. Rørstrengen 20 innbefatter en tandemkoblet landingsnippel 25 for en ved hjelp av en vaier fjernbar rør-sikkerhetsventil 30, en landingsnippel 31 for frigjørbar låsing av en ringrom-sikkerhetsventil 32 utformet i samsvar med oppfinnelsen, en øvre hylseventil 33, en pakning 34 for avtetting mellom rør-et og foringsrøret 14, og en nedre hylseventil 35. in the pipe string. In a similar way, a hydraulic fluid control line 24 is led down through the wellhead and further down into the well, for operating the annulus safety valve according to the invention. The pipe string 20 includes a tandem-connected landing nipple 25 for a pipe safety valve 30 removable by means of a cable, a landing nipple 31 for releasable locking of an annulus safety valve 32 designed in accordance with the invention, an upper sleeve valve 33, a gasket 34 for sealing between pipes -et and casing 14, and a lower sleeve valve 35.

Foringsrøret 14 kan ved sin nedre ende munne ut mot en øvre produksjonsformas jon som gir fluidumstrøm inn i ringrommet 21, mens røret 20 kan strekke seg ned igjennom en andre, ikke vist, pakning til forbindelse med en nedre produksjonsformasjon under den andre pakning. Brønnkompletterings-utstyret som er forbundet med den nedre delen av røret 20 og den nedre enden av forings-røret 14 innbefatter standard brønnkompletterings-komponenter som kan variere avhengig av forholdene i den enkelte brønn. Røret 20 føres ned i brønnhullboringen gjennom brønnhodet som The casing pipe 14 can open at its lower end towards an upper production formation which provides fluid flow into the annulus 21, while the pipe 20 can extend down through a second, not shown, seal to connect with a lower production formation below the second seal. The well completion equipment associated with the lower part of the pipe 20 and the lower end of the casing 14 includes standard well completion components which may vary depending on the conditions in the individual well. The pipe 20 is led down into the wellbore through the wellhead which

en enhet, med pakningen 34 plassert i ønsket dybde over dena unit, with the gasket 34 placed at the desired depth above it

øvre produksjonsformasjonen i en brønn, når det dreier seg om produksjonen fra to formasjoner. Ringrom-sikkerhetsventilen ifølge oppfinnelsen føres ned ved hjelp av en vaier og settes i rørsystemet etter at pakningen er satt på plass. Rør-sikkerhetsventilen føres så ned og settes på plass i rørsystemet over ringrom-sikkerhetsventilen ved hjelp av standard vaierutstyr- upper production formation in a well, when it concerns production from two formations. The annulus safety valve according to the invention is brought down by means of a cable and placed in the pipe system after the gasket has been put in place. The pipe safety valve is then brought down and set in place in the pipe system above the annulus safety valve using standard wire equipment-

og teknikk. Brønnpakningen 34 kan være en standard hydraulisk betjent RH-pakning som fremstilles og selges av Otis Engineering Corporation og er vist og beskrevet på side 3944 i 1974-75-ut-gaven av The Composite Catalog of Oilfield Equipment and Services, publisert av World Oil, Houston, Texas, USA. Den vaier- and technique. The well pack 34 may be a standard hydraulically operated RH pack manufactured and sold by Otis Engineering Corporation and shown and described on page 3944 of the 1974-75 edition of The Composite Catalog of Oilfield Equipment and Services, published by World Oil, Houston, Texas, USA. It sway-

gjenvinnbare rør-sikkerhetsventil 3 0 kan også være en standard-sikkerhetsventil, så som type DK fra Otis Engineering Corporation, vist og beskrevet på side 3998 i 1974-75-utgaven av den ovenfor nevnte katalog. recoverable tube safety valve 30 may also be a standard safety valve, such as type DK from Otis Engineering Corporation, shown and described on page 3998 of the 1974-75 edition of the above-mentioned catalog.

Som vist i fig. 2A-2H har landingsnippelen 31 i rørsystemet 20 en innvendig ringformet lande- og låseutsparingsprofil 4 0 beregnet for landing og låsing av låsekjernedelen som bærer ringrom-sikkerhetsventilen 32 i røret. Under profilen 40 As shown in fig. 2A-2H, the landing nipple 31 in the pipe system 20 has an internal annular landing and locking recess profile 40 intended for landing and locking the locking core part which carries the annular space safety valve 32 in the pipe. Under the profile 40

er landingsnippelen 31 forsynt med en styreledning-bærebrakett 41. En styreledning-kobling 42 er forbundet med landingsnippelen og står i forbindelse med en port 53 gjennom landingsnippelen. Gjennom denne port kan styrefluidum fra styreledningen 24 gå for styring av ringrom-sikkerhetsventilen 32. Nippelen 31 har en utvidet nedre endedel 44 som er skrudd inn the landing nipple 31 is provided with a guide wire carrier bracket 41. A guide wire connector 42 is connected to the landing nipple and is connected to a port 53 through the landing nipple. Through this port, control fluid from the control line 24 can go to control the annulus safety valve 32. The nipple 31 has an extended lower end part 44 which is screwed in

i den øvre enden av et rørformet hus 45 på den øvre glidehylseventil 33. Den nedre enden av hylseventilhuset 45 er forbundet med pakningen 34. Den nedre enden av pakningen er forbundet med huset 45 til den nedre glidehylseventil 35, som har samme konstruksjon som den øvre glidehylseventil 33. in the upper end of a tubular housing 45 on the upper sliding sleeve valve 33. The lower end of the sleeve valve housing 45 is connected to the gasket 34. The lower end of the gasket is connected to the housing 45 of the lower sliding sleeve valve 35, which has the same construction as the upper sliding sleeve valve 33.

Oppbyggingen og virkemåten til øvre og nedre glidehylseventil 33 og 35 er lik oppbyggingen og virkemåten til den med glidehylseventil som er vist og beskrevet i US-PS The structure and operation of the upper and lower slide valve 33 and 35 is similar to the structure and operation of the slide valve shown and described in US-PS

.Hylseventilen 33 og 35 har en spesiell konstruktiv utforming som innbefatter en rørformet tildekning som beskytter ventil-pakningene når ventilen åpnes og lukkes. Som vist i fig. 2B .The sleeve valve 33 and 35 have a special constructive design which includes a tubular cover which protects the valve seals when the valve is opened and closed. As shown in fig. 2B

og 2C har huset 45 én eller flere sideporter 50 som gir forbindelse med ringrommet. En rørformet tildekning 51 er montert jfor langsgående glidebevegelse inn i huset for derved å åpne and 2C the housing 45 has one or more side ports 50 which provide a connection with the annulus. A tubular cover 51 is fitted for longitudinal sliding movement into the housing to thereby open

og lukke sideportene 50 i sekvenstrinn med åpning og lukking av ventillegemet i hylseventilen, for derved å beskytte pakningene på ventillegemet. Tildekningen 51 har et redusert endeparti 52 som er skrudd inn i en tildekning-betjeningshyIse and close the side ports 50 in sequential steps with opening and closing of the valve body in the sleeve valve, thereby protecting the gaskets on the valve body. The cover 51 has a reduced end portion 52 which is screwed into a cover operating housing

.53 som holder flere rundt omkretsen avstandsplasserte tildek-nings-betjeningsknaster 54 i vinduer 55 i tildekning-betjenings-hylsen. Huset til hylseventilen har et sentralt løp 60 med .53 which holds several cover-operating knobs 54 spaced around the perimeter in windows 55 in the cover-operating sleeve. The housing of the sleeve valve has a central barrel 60 med

større diameter enn løpet 61, slik at det derved tilveiebringes to radielle stillinger for knastene 54. Løpene 60 og 61 er adskilt fra hverandre ved hjelp av en innvendig ringformet kamskulder 62 som bevirker at knastene 54 beveger seg innover fra det større løp 6 0 og til det mindre løp 61 under åpningen av hylseventilen. Et rørformet ventillegeme 63 med utvendige avstandsplasserte O-ringer 64 og 65 er glidbart plassert inne larger diameter than the race 61, so that two radial positions are thereby provided for the cams 54. The races 60 and 61 are separated from each other by means of an internal ring-shaped cam shoulder 62 which causes the cams 54 to move inwards from the larger race 6 0 and to the smaller barrel 61 during the opening of the sleeve valve. A tubular valve body 63 with externally spaced O-rings 64 and 65 is slidably located inside

i tildekningen 51 for åpning og lukking av sideporten i hylseventilen synkront med betjeningen av tildekningen. Ventillegemet 63 har en sideport 70 for en fluidumstrøm når ventillegemet er åpent. Ventillegemet 63 er skrudd på et betjenings-rør 71 som har teleskopglide-innpassing i tildekningens reduserte parti 52. Betjeningsrøret 71 har en utvendige ringutsparing 72 som samvirker med knastene 54 ved åpning og lukking av tildekningen. Betjeningsrøret 71 har også en innvendig ringformet betjeningskileprofil 73 som kan samvirke med en betjeningskile på ringrom-sikkerhetsventilen 32, slik at når sikkerhetsventilen monteres vil glidehylseventilene 33 og 35 åpnes in the cover 51 for opening and closing the side port in the sleeve valve synchronously with the operation of the cover. The valve body 63 has a side port 70 for a fluid flow when the valve body is open. The valve body 63 is screwed onto an operating tube 71 which has a telescopic sliding fit in the cover's reduced part 52. The operating tube 71 has an external annular recess 72 which cooperates with the cams 54 when opening and closing the cover. The operating pipe 71 also has an internal annular operating wedge profile 73 which can cooperate with an operating wedge on the annulus safety valve 32, so that when the safety valve is mounted the sliding sleeve valves 33 and 35 will be opened

og slik at når ventilen gjenvinnes vil hylseventilene være and so that when the valve is recovered the sleeve valves will be

lukket. Kileprofilen 73 virker under åpningen av hylseventilen. Ventillegemet 63 er på lignende måte forsynt med en betjeningskileprofil 74 beregnet for samvirke med betjeningskilen på ringrom-sikkerhetsventilen for lukking av glide-hylseventilen når ringrom-sikkerhetsventilen gjenvinnes. Endekanten 75 på tildekningen passer tett mot endekanten 80 på glidehylseventil-husporten 50. Knastene 54 kobler tildekningen og betjenings-røret 71 isammen for åpning og lukking av tildekningen i en sekvens som bevirker en åpning av ventillegemet 6 3 før tildekningen åpner, og lukker ventillegemet etter at tildekningen er lukket, slik at når O-ringen 6 4 beveger seg over gapet mellom enden 80 av sideporten og endekanten 75 på tildekningen, vil tildekningen være i tett samvirke med portflaten under såvel åpning som lukking av ventilen. Tildekningen 51 og ventillegemet 6 3 er vist i åpen stilling i fig. 2B. Når ventillegemet ,og tildekningen begge er lukket, vil tildekningens endekant 65 samvirke med sideportvinduet 80 og ventillegemets endekant 79 vil samvirke med en innvendig ringformet stoppskulder 51 inne close. The wedge profile 73 acts during the opening of the sleeve valve. The valve body 63 is similarly provided with an operating wedge profile 74 designed to cooperate with the operating wedge on the annulus safety valve for closing the sliding sleeve valve when the annulus safety valve is recovered. The end edge 75 of the cover fits closely against the end edge 80 of the sliding sleeve valve housing port 50. The cams 54 connect the cover and the operating tube 71 together for opening and closing the cover in a sequence which causes an opening of the valve body 6 3 before the cover opens, and closes the valve body after that the cover is closed, so that when the O-ring 6 4 moves across the gap between the end 80 of the side port and the end edge 75 of the cover, the cover will be in close cooperation with the port surface during both opening and closing of the valve. The cover 51 and the valve body 6 3 are shown in the open position in fig. 2B. When the valve body and the cover are both closed, the cover's end edge 65 will cooperate with the side port window 80 and the valve body's end edge 79 will cooperate with an internal annular stop shoulder 51 inside

i huset til glidehylseventilen. Under åpningen av glidehylseventilen vil betjeningskilen på ringrom-sikkerhetsventilen samvirke med kileprofilen 73 inne i betjeningsrøret 71 til glidehylseventilen og bevege betjeningsrøret og ventillegemet 63 nedover, slik at O-ringen 64 passerer gapet mellom den lukkede tildekningsflate og sideportflaten 80, hvoretter den utvendige, ringformede betjeningsskulder 82 på den nedre enden av ventillegemet 6 3 samvirker med den innvendige ringformede betjeningsskulder 83 inne i tildekningen 51 og trekker denne in the housing of the sliding sleeve valve. During the opening of the sliding sleeve valve, the operating wedge of the annulus safety valve will cooperate with the wedge profile 73 inside the operating tube 71 of the sliding sleeve valve and move the operating tube and valve body 63 downwards, so that the O-ring 64 passes the gap between the closed cover surface and the side port surface 80, after which the external, annular operating shoulder 82 on the lower end of the valve body 6 3 cooperates with the internal annular operating shoulder 83 inside the cover 51 and pulls this

nedover. Når tildekningen er lukket vil knastene 5 4 være i det utvidede løp 60, over kamskulderen 62 inne i hylseventilhuset. Den nedadrettede kraft på tildekningen vil kamstyre knastene 54 inn i utsparingen 72 på betjeningsrøret som beveges til innretning i forhold til knastene når betjeningsrøret beveger seg nedover. Utsparingen 72 tillater knastene 54 å gå innover under påvirkning av skulderen 72, hvorved tildekningen fri-gjøres for bevegelse nedover. Tildekningen trekkes så til den i fig. 2B viste åpne stilling. Når betjeningsrøret bevéges til den nedre endestilling, i hvilken tildekningen og ventillegemet i glidehylseventilen er helt åpen, vil betjeningskilen å ringrom-sikkerhetsventilen kamstyres innover og ut av kile-utsparingen 73 slik at ringrom-sikkerhetsventilen kan fortsette sin nedadrettede bevegelse etter åpningen av den øvre glidehylseventil. Den nedre glidehylseventil åpnes på samme måte. Ved den oppadgående returbevegelse av betjeningskilen på ringrom-sikkerhetsventilen under gjenvinningen av ringrom-sikkerhetsventilen, vil kilen samvirke med utsparingen 74 ved den øvre enden av ventillegemet 6 3 og trekke ventillegemet oppover langs betjeningsrøret 71. Fordi knastene 54 er i inntrukne stillinger inne i utsparingen 72 i betjeningsrøret, vil den oppadrettede kraft på betjeningsrøret løfte knastene 54 oppover og derved heve tildekningen 51 helt til tildekningens øvre endekant 75 samvirker med sideportflaten 80, hvilket skjer før ventillegemet 6 3 beveger seg oppover i forhold til tildekningen. Når knastene 54 går oppover flaten 62 og inn downwards. When the cover is closed, the cams 5 4 will be in the extended barrel 60, above the cam shoulder 62 inside the sleeve valve housing. The downward force on the cover will cam guide the cams 54 into the recess 72 on the operating tube which is moved into alignment with respect to the cams when the operating tube moves downwards. The recess 72 allows the lugs 54 to move inwards under the influence of the shoulder 72, whereby the covering is freed for downward movement. The cover is then drawn to the one in fig. 2B showed open position. When the operating tube is moved to the lower end position, in which the cover and the valve body in the sliding sleeve valve are completely open, the operating wedge of the annulus safety valve will be combed in and out of the wedge recess 73 so that the annulus safety valve can continue its downward movement after the opening of the upper sliding sleeve valve . The lower sliding sleeve valve is opened in the same way. Upon the upward return movement of the operating wedge of the annulus safety valve during recovery of the annulus safety valve, the wedge will engage with the recess 74 at the upper end of the valve body 6 3 and pull the valve body upward along the operating tube 71. Because the cams 54 are in retracted positions inside the recess 72 in the operating tube, the upward force on the operating tube will lift the cams 54 upwards and thereby raise the cover 51 until the cover's upper end edge 75 interacts with the side port surface 80, which happens before the valve body 6 3 moves upwards in relation to the cover. When the knobs 54 go up the surface 62 and in

i det større løp 60 i hylseventilhuset, vil knastene kamstyres utover og ut av utsparingen 72 og derved frigjøre in the larger barrel 60 in the sleeve valve housing, the cams will be cam guided outwards and out of the recess 72 and thereby release

betjeningsrøret 21 og ventillegemet, for fortsatt bevegelse oppover for lukking av ventillegemet. Ventillegemet og betjeningsrøret trekkes oppover helt til ventillegemets øvre endekant 79 samvirker med stoppskulderen 81 inne i hylseventilhuset. Betjeningskilen på ringrom-sikkerhetsventilen kamstyres så ut av profilen 74 på ventillegemet og frigjør ringrom-sikkerhetsventilen slik at den kan trekkes opp fra sin arbeidsstilling i rørsystemet 20 ved hjelp av en vaier. Såvel nedre som øvre glidehylseventil lukkes på samme måte under gjenvinningen av ringrom-sikkerhetsventilen. Da tildekningen åpner etter at ventillegemet åpner og lukker før ventillegemet lukker, vil O-ringen 6 3 ikke utsettes for strømningsavskjæring ved sideporten i glidehylseventilen._ Når knastene 54 kamstyres utover fra utsparingen 72 i betjeningsrøret 71 vil den med større diameter utførte del av betjeningsrøret under utsparingen 72 bevege seg bak knastene slik at knastene låses utover i det større løp 60 i hylseventilhuset. Fordi knastene 54 holdes utover over skulderen 62 vil tildekningen 51 være låst i lukket tilstand så lenge betjeningsrøret er i den øvre stilling, i hvilken ventillegemet 63 er lukket. Hylseventilene 34 og 35 har låse-fangfingre 76 langs utsparingsprofilen 73. Disse fangfingre tjener til frigjørbar låsing av hylseventilene i åpen og lukke.t stilling. Bosset langs hver finger 76 samvirker med den innvendige utsparing 77 i husavsnittet 46 for låsing av hylsen i lukket tilstand, og samvirker med utsparingen 78 for låsing av hylsen i åpen tilstand, som vist i fig. 2C, 3C, 2G og 3G. De øvre og nedre glidehylseventiler avstenger ringrom-strømningspassasjen som styres av ringrom-sikkerhetsventilen ifølge oppfinnelsen når ventilen fjernes fra systemet, og åpner iringrom-strømningspassasjen når ringrom-sikkerhetsventilen monteres for innsats i rørsystemet. the operating tube 21 and the valve body, for continued upward movement to close the valve body. The valve body and operating tube are pulled upwards until the valve body's upper end edge 79 cooperates with the stop shoulder 81 inside the sleeve valve housing. The operating wedge on the annulus safety valve is cam-guided out of the profile 74 on the valve body and releases the annulus safety valve so that it can be pulled up from its working position in the pipe system 20 by means of a cable. Both the lower and upper slide valve are closed in the same way during the recovery of the annulus safety valve. As the cover opens after the valve body opens and closes before the valve body closes, the O-ring 6 3 will not be exposed to flow cut-off at the side port in the sliding sleeve valve._ When the cams 54 are cam-controlled outwards from the recess 72 in the operating tube 71, the larger diameter part of the operating tube below the recess 72 moves behind the cams so that the cams are locked outwards in the larger barrel 60 in the sleeve valve housing. Because the cams 54 are held outwards over the shoulder 62, the cover 51 will be locked in the closed state as long as the operating tube is in the upper position, in which the valve body 63 is closed. The sleeve valves 34 and 35 have locking catch fingers 76 along the recess profile 73. These catch fingers serve to releasably lock the sleeve valves in the open and closed position. The boss along each finger 76 cooperates with the internal recess 77 in the housing section 46 for locking the sleeve in the closed state, and cooperates with the recess 78 for locking the sleeve in the open state, as shown in fig. 2C, 3C, 2G and 3G. The upper and lower sliding sleeve valves shut off the annulus flow passage controlled by the annulus safety valve of the invention when the valve is removed from the system, and open the annulus flow passage when the annulus safety valve is installed for insertion into the piping system.

Som vist i fig. 2A-2H innbefatter ringrom-sikkerhetsventilenAs shown in fig. 2A-2H include the annulus safety valve

32 ifølge oppfinnelsen en rørformet ventillegeme-enhet 90 som ier glidbart anordnet konsentrisk inne i en ventilhus-enhet 91. Som vist i fig. 2A er en låse-kjernedelenhet 92 festet på den øvre enden av ventilhuset 91 for frigjørbar låsing av ringrom- sikkerhetsventilen i landingsnippelen 31 ved lande- og låseutsparingen 40. Låse-kjernedelen 92 er en låse-kjernedel av standard type X fremstilt av Otis Engineering Corporation og vist og beskrevet på side 3958 i 1974-75 utgangen av The Composite Catalog of Oilfield Equipment Services, som er nevnt foran. Låse-kjernedelen er skrudd inn i den øvre enden av sikkerhetsventilhuset og bærer en pakningsenhet 93 som tetter mot"veggen i glidehylseventilhuset 44 over styrefluidumsporten 43. 32 according to the invention a tubular valve body unit 90 which is slidably arranged concentrically inside a valve housing unit 91. As shown in fig. 2A is a lock core assembly 92 attached to the upper end of the valve body 91 for releasably locking the annulus safety valve in the landing nipple 31 at the landing and lock recess 40. The lock core 92 is a standard Type X lock core manufactured by Otis Engineering Corporation and shown and described on page 3958 of the 1974-75 issue of The Composite Catalog of Oilfield Equipment Services, aforesaid. The locking core part is screwed into the upper end of the safety valve housing and carries a packing assembly 93 that seals against the wall of the sliding sleeve valve housing 44 above the control fluid port 43.

Ringrom-sikkerhetsventilhuset 51 innbefatter en hodedel 94Annular safety valve housing 51 includes a head portion 94

med en innvendig O-ring 55 som gir tetning mellom hodedelen og ventillegeme-enheten 90. Hodedelen 94 har et avsmalnet ytre ringparti 100 som sammen med innerveggen i hylseventilhusets 44 hodedel danner et ringkammer 101 for styrefluidum som føres inn gjennom porten 43 for betjening av ringrom-sikkerhetsventilen. En paknings-enhet 10 2 er montert på hodedelen 9 4 under det reduserte avsnitt 10 0, for avtetting av den nedre enden av styrefluidum-ringrommet 101. En sideport 10 3 slipper inn styrefluidum fra ringrommet 101 og inn i et utvidet løpsavsnitt 104 i sikkerhetsventilhusets hodedel 94, hvilket utvidede løpsav-snitt danner et styrefluidum-betjeningskammer rundt ventilrør-enheten 90 inne i sikkerhetsventilhuset 91. Et ringformet betjeningsstempel 105 er plassert inne i kammeret 104, mellom ventilrørenheten 90 og ringrom-sikkerhetsventilhuset 91. Den øvre endedelen av ventilrør-enheten 90 har en utvendig betjeningsflens 110 som påvirkes av stemplet 105 for åpning av ringrom-sikkerhetsventilen hydraulisk. Ringrom-sikkerhetsventilhusets hodedel 94 har et nedre rørformet ventilseteavsnitt 111 som er forsynt med et nedre endekant-ventilsete 112 som i hovedsaken flukter med sideporten 50 i glidehylseventilen 33 når ringrom-sikkerhetsventilen er montert i rørsystemet 20, with an internal O-ring 55 which provides a seal between the head part and the valve body unit 90. The head part 94 has a tapered outer ring part 100 which together with the inner wall in the head part of the sleeve valve housing 44 forms an annular chamber 101 for control fluid which is fed in through the port 43 for operating the annulus - the safety valve. A packing unit 10 2 is mounted on the head part 9 4 below the reduced section 10 0, for sealing the lower end of the control fluid annulus 101. A side port 10 3 admits control fluid from the annulus 101 and into an extended barrel section 104 in the safety valve housing head portion 94, which extended barrel sections form a control fluid operating chamber around the valve tube assembly 90 inside the safety valve housing 91. An annular operating piston 105 is located inside the chamber 104, between the valve tube assembly 90 and the annulus safety valve housing 91. The upper end portion of the valve tube assembly 90 has an external operating flange 110 which is acted upon by the piston 105 to open the annulus safety valve hydraulically. The annulus safety valve body head part 94 has a lower tubular valve seat section 111 which is provided with a lower end edge valve seat 112 which is substantially flush with the side port 50 in the slide sleeve valve 33 when the annulus safety valve is mounted in the piping system 20,

med bæring fra landingsnippelen 31. En ringformet ventil 113 med et øvre ventilavsnitt 114 og et redusert nedre, innvendig gjenget husparti 115 er festet langs huspartiet med en nedre endedel av den øvre ventilrør-enhetsdelen 106. Ventillegemet 113 with bearing from the landing nipple 31. An annular valve 113 with an upper valve section 114 and a reduced lower, internally threaded housing portion 115 is attached along the housing portion with a lower end portion of the upper valve tube unit portion 106. The valve body 113

har en øvre konisk ventil ventilseteflate 120 som ligger an mot seteflaten 112 på ventillegemet 111 og danner en metall-tetning når ventillegemet er lukket mot setelegemet som vist i fig. 2B. Den øvre endedel 106 av ventilrørenheten 90 har et utvendig ringformet boss 121 som har glidepasning il venti 1-setelegemet 111 og utøyer en styre- og avstandsfunksjon når ventilrør-enheten beveger seg mellom den lukkede ventilstilling i fig. 2B og den åpne ventilstilling i fig. 3B. Ventillegemet 113 er forsynt med langs omkretsen avstandsplasserte porter 122 plassert langs den avsmalnede del av ventillegemet mellom den øvre endedel 114 og legemets reduserte nedre endedel 115. Ventillegemet 114 er konsentrisk plassert rundt ven-tilrør-enhetensdelen 106 og danner derved en ringformet strøm-ningspassas je 123 for en fluidumstrøm langs ventilenheten, ifra portene 122 og oppover gjennom ventilrørdelen 106 og til den øvre enden av ventillegemet når ventillegemet er åpent, som vist i fig. 3B. Huset til ringrom-sikkerhetsventilen har en rørformet del 12 4 som er forsynt med gjenger langs den øvre endedel og sammenskrudd med den nedre endedel av ringrom-sikkerhetsventilens hodedel 94 rundt ventilsetedelen 111, med en konsentrisk avstand langs ventilrør-enhetsdelen 106 og ventillegemet 114. Husavsnittet 124 har en sideport 125 hvorigjennom fluider kan strømme til sideportene i den øvre glidehylseventil 33 når ringrom-sikkerhetsventillegemet 114 er i den nedre åpne stilling i fig. 3B. Ventillegemet 114 har glidetilpasning inne i huspartiet 12 4 og har en utvendig ringpakning 130 som danner en glidetetning mellom ventillegemet og innerveggen i husavsnittet når ventillegmet 114 åpnes og lukkes. Det reduserte parti 115 av ventillegemet 113 danner en ringformet strømningspassasje mellom ventilrør-enheten under portene 122 inn i husavsnittet 12 4, frem til portene 122 fra undersiden av ventillegemet. Ringrom-sikkerhetsventilen 32 har en i lengderetningen utstrakt hus- og ventillegemesoppbyg-ningen som strekker seg under den nedre hylseventil 35 under pakningen 34. Det dannes en ringformet strømningspassasje gjennom pakningen fra den nedre hylseventil-enhet og til den øvre hylseventil-enhet, slik at ringromfluidene kan strømme fra ringrommet mellom rør og foringsrør under pakningen og inn'i ringrommet over pakningen gjennom ringrom-sikkerhetsventilen. Huset til ringrom-sikkerhetsventilen innbefatter en øvre del 124 som med en nedre endedel er skrudd på den øyre enden av husdelen 132, hvor det er lagt inn en utvendig ringpakning-enhet 133. Under pakningsehheten 133 er husdelen 132 utført med redusert diameter og er forsynt med langs omkretsen avstandsplasserte porter 13 4 som slipper ringromfluidum fra under pakningen 133 inn i et ringrom 135 rundt vehtillegeme-rørenheten 90 inne i husdelen 124 ,og 134 og inn i ringrommet 131 som står i forbindelse med ventillegeme-portene 122. Husdelen 132 har en innvendig flens 144 med en 0-ring 141 som danner glidetetning mellom flensen og ventilrøret under portene 134. Den nedre endedel av husdelen 132 er skrudd på den øvre enden av en husdel 142 hvor det er en.innvendig øvre ende-flens 143 hvis øvre endekant 144 danner en fjæravstøttings^skulder for en av de fjærer som benyttes for å presse ventillegeme-rørenheten 90 mot den lukkede stilling. Flere husdeler 142 er tandemkoblet for å gi tilstrekkelig lengde slik at ringrom- venti lhuset kan gå inn i den nedre hylseventil 35. Ytter-diameteren til husdelen 142 er mindre enn diameteren til røret 20 langs den øvre glidehylseventil, pakningen og den nedre glidehylseventil, slik at det dannes en ringformet strømnings-passas je 145 for ringromÆluidum fra den nedre glidehylseventil, gjennom pakningen og inn i sideporten 134 i ringrom-sikkerhetsventilen. Bunndelen 142 er skrudd på den øvre enden av en has an upper conical valve valve seat surface 120 which rests against the seat surface 112 of the valve body 111 and forms a metal seal when the valve body is closed against the seat body as shown in fig. 2B. The upper end part 106 of the valve tube unit 90 has an external annular boss 121 which has a sliding fit in the valve 1 seat body 111 and exerts a control and distance function when the valve tube unit moves between the closed valve position in fig. 2B and the open valve position in fig. 3B. The valve body 113 is provided with circumferentially spaced ports 122 located along the narrowed part of the valve body between the upper end part 114 and the body's reduced lower end part 115. The valve body 114 is concentrically placed around the vein-to-pipe unit part 106 and thereby forms an annular flow passage 123 for a fluid flow along the valve assembly, from the ports 122 upwards through the valve tube portion 106 and to the upper end of the valve body when the valve body is open, as shown in fig. 3B. The housing of the annulus safety valve has a tubular part 12 4 which is threaded along the upper end part and screwed together with the lower end part of the annulus safety valve head part 94 around the valve seat part 111, with a concentric distance along the valve tube unit part 106 and the valve body 114. 124 has a side port 125 through which fluids can flow to the side ports in the upper sliding sleeve valve 33 when the annulus safety valve body 114 is in the lower open position in fig. 3B. The valve body 114 has a sliding fit inside the housing part 12 4 and has an external ring seal 130 which forms a sliding seal between the valve body and the inner wall in the housing section when the valve body 114 is opened and closed. The reduced portion 115 of the valve body 113 forms an annular flow passage between the valve pipe unit below the ports 122 into the housing section 124, up to the ports 122 from the underside of the valve body. The annular safety valve 32 has a longitudinally extended housing and valve body structure that extends below the lower sleeve valve 35 below the gasket 34. An annular flow passage is formed through the gasket from the lower sleeve valve assembly and to the upper sleeve valve assembly, so that the annulus fluids can flow from the annulus between pipe and casing under the gasket and into the annulus above the gasket through the annulus safety valve. The housing of the annulus safety valve includes an upper part 124 which with a lower end part is screwed onto the right end of the housing part 132, where an external ring seal unit 133 is inserted. Below the seal unit 133, the housing part 132 is made with a reduced diameter and is provided with ports 13 4 spaced along the circumference which release annulus fluid from under the gasket 133 into an annulus 135 around the valve body pipe unit 90 inside the housing part 124 and 134 and into the annulus 131 which is in connection with the valve body ports 122. The housing part 132 has a internal flange 144 with an 0-ring 141 which forms a sliding seal between the flange and the valve tube under the ports 134. The lower end part of the housing part 132 is screwed onto the upper end of a housing part 142 where there is an internal upper end flange 143 whose upper end edge 144 forms a spring abutment shoulder for one of the springs used to press the valve body-tube assembly 90 towards the closed position. Several housing parts 142 are tandemly connected to provide sufficient length so that the annulus valve housing can enter the lower sleeve valve 35. The outer diameter of the housing part 142 is smaller than the diameter of the tube 20 along the upper sliding sleeve valve, the gasket and the lower sliding sleeve valve, so that an annular flow passage 145 is formed for annulus fluid from the lower sliding sleeve valve, through the gasket and into the side port 134 of the annulus safety valve. The bottom part 142 is screwed onto the upper end of a

rørformet pakningsdel 15 0 utformet med en utvidet nedre endedel hvor det er plassert en ringformet pakningsenhet 151 for avtetting inne i den nedre del av bunn-glidehylseventilen, hvor den i nedre ende av den ringformede strømningspassasje 145 dannes. tubular packing part 150 designed with an extended lower end part where an annular packing unit 151 is placed for sealing inside the lower part of the bottom sliding sleeve valve, where at the lower end of the annular flow passage 145 is formed.

En betjeningskile-enhet 152 er skrudd på den nedre enden av pakningsdelen 150. Betjeningskile-enheten har et øvre koblings-parti 153 som er forbundet med et kilebur 154 utformet med flere langs omkretsen avstandsplasserte langsgående vinduer i 155. En hylseventil-betjeningskile 160 er plassert i hvert av vinduene 155 med mulighet for radiell ekspansjon og kontrasjon for derved å betjene de øvre og nedre glidehylseventiler 33 og An operating wedge assembly 152 is screwed onto the lower end of the packing member 150. The operating wedge assembly has an upper connecting portion 153 which is connected to a wedge cage 154 formed with several circumferentially spaced longitudinal windows in 155. A sleeve valve operating wedge 160 is placed in each of the windows 155 with the possibility of radial expansion and contraction to thereby operate the upper and lower sliding sleeve valves 33 and

35 under installering og gjenvinning av ringrom-sikkerhetsventilen. En rørformet kjernedel 161 er med en endedel skrudd inn i koblingen 153 og strekker seg inn i kileburet 154 innenfor betjeningskilene 160. En bladfjær 162 er plassert i hvert en vinduene 155 mellom kilen 160 i vinduet og ytterflaten på kjernedelen 161, for pressing av kilen radielt utover. Den øvre enden av hver av fjærene 162 har en bøyet endedel 163 35 during installation and recovery of the annulus safety valve. A tubular core part 161 is with one end part screwed into the coupling 153 and extends into the wedge cage 154 within the operating wedges 160. A leaf spring 162 is placed in each of the windows 155 between the wedge 160 in the window and the outer surface of the core part 161, for pressing the wedge radially beyond. The upper end of each of the springs 162 has a bent end part 163

som passer inn i et hull i den øvre enden av tilhørende kile 160, for derved å tilveiebringe en løs sammenkobling av fjæren med kilen, hvilket letter innrettingen og plasseringen av fjæren i forhold til kilen. De langsgående sidekanter på kilene 160 og kileburvinduene 155 er slik utformet at kilene holdes i vinduene når de beveger seg inn <og ut langs rørstrengen, ved åpning og lukking av glidehylseventilene. Ytterprofilen langs lengden av hver kile er tilformet for tilpassing til de innvendige betjeningsprofiler på hylselegemet 63 og betjeningsrør-et 71 for hver av glidehylseventilene 33 og 35. Kilen 160 holdes utover under påvirkning av fjærene 162, slik at kile-profilene vil slepe langs rørstrengveggen helt til kilene når betjeningsprofilene i glidehylseventilene. Kilene kan da gå utover og samvirke med de tilhørende betjeningsprofiler for åpning og lukking av hver av hylseventilene ved installering og gjenvinning av ringrom-sikkerhetsventilen. which fits into a hole in the upper end of the associated wedge 160, thereby providing a loose coupling of the spring with the wedge, facilitating the alignment and positioning of the spring relative to the wedge. The longitudinal side edges of the wedges 160 and the wedge cage windows 155 are designed so that the wedges are held in the windows when they move in and out along the pipe string, when opening and closing the sliding sleeve valves. The outer profile along the length of each wedge is designed to match the internal operating profiles on the sleeve body 63 and the operating tube 71 for each of the sliding sleeve valves 33 and 35. The wedge 160 is held outwards under the influence of the springs 162, so that the wedge profiles will drag along the pipe string wall completely until the wedges reach the operating profiles in the sliding sleeve valves. The wedges can then extend outwards and cooperate with the associated operating profiles for opening and closing each of the sleeve valves when installing and recycling the annulus safety valve.

Betjeningsrør-enheten 90 i ringrom-sikkerhetsventilen er på teleskopisk og konsentrisk måte forbundet med sikkerhetsventilhuset og går inn i legemet 150 ved den nedre enden av huset, som vist i fig. 2G og 3G. Den nedre enden av den øvre delen 106 av ventilrørenheten passer inn i den utvidede øvre ende 170 på den rørformede del 171, som er konsentrisk plassert inne i husdelene 134 og 132. Ventilrørdelen 171 har en avstand fra husdelen 124 og 132 slik at det dannes ringformede strømningspassasjer 131 og 135 hvor ringromfluider kan gå i sikkerhetsventilen, fra portene 134 og til portene 132 som vist i fig. 2B og 2C. 0-ringen 141 i flensen 140 på husdelen 132 har glidepasning med ytterveggen på ventilrørdelen 171. The operating tube assembly 90 of the annulus safety valve is telescopically and concentrically connected to the safety valve housing and enters the body 150 at the lower end of the housing, as shown in FIG. 2G and 3G. The lower end of the upper portion 106 of the valve tube assembly fits into the extended upper end 170 of the tubular portion 171, which is concentrically located within the housing portions 134 and 132. The valve tube portion 171 is spaced from the housing portion 124 and 132 to form annular flow passages 131 and 135 where annulus fluids can go in the safety valve, from ports 134 and to ports 132 as shown in fig. 2B and 2C. The 0-ring 141 in the flange 140 of the housing part 132 has a sliding fit with the outer wall of the valve pipe part 171.

Den nedre endedel av ventilrørdelen 171 passer inn i den ut videde øvre ende 172 av en rørformet fjærdel 173 i ventilrør-enheten. Den nedre, utvendige og ringformede endekant på The lower end part of the valve tube part 171 fits into the widened upper end 172 of a tubular spring part 173 in the valve tube unit. The lower, outer and ring-shaped end edge of

den utvidede øvre endedel 16 2 av rørdelen 173 danner en ringformet stoppskulder 174 for den øvre enden av en fjær 175 som holdes mellom skulderen 174 og en fjæravstøttingsskulder 144 på den øvre endekanten av foringsrørdelen 142. Fjæren 175 passer inn i ringrommet 180 mellom yttersiden ay rørdelen 173 og innersiden av foringsdelen 132. Flere ventilrørdeler 173 er koblet sammen ende mot ende, med den nedre enden til hver sin del innpasset i den utvidede øvre enden til den neste, nedenforliggende rørdel. Langs hver av rørdelene er en av fjærene 175 innspent som beskrevet foran, mellom stoppskulderen 174 på den øvre enden av rørdelen og en stoppskulder 144 the extended upper end part 16 2 of the pipe part 173 forms an annular stop shoulder 174 for the upper end of a spring 175 which is held between the shoulder 174 and a spring abutment shoulder 144 on the upper end edge of the casing part 142. The spring 175 fits into the annular space 180 between the outer side and the pipe part 173 and the inner side of the liner part 132. Several valve pipe parts 173 are connected end to end, with the lower end of each part fitting into the extended upper end of the next, below pipe part. Along each of the pipe sections, one of the springs 175 is clamped as described above, between the stop shoulder 174 on the upper end of the pipe section and a stop shoulder 144

på en husdel hvor rørdelen er glidbart anordnet, Bunnventil-rørdelen 173 går teleskopisk inn i den øvre endedelen av bunnpaknings-kjernedelen 150 i ringrom-sikkerhetsventilhuset, som vist i fig. 2G. Fjærene 175 virker sammen for tilveiebringelse av en oppadrettet ventil-lukkekraft på ventilrøret 90, for derved å presse ventilsetet 120 på ventillegemet 114 mot ventilseteflaten 112 på ventilsetelegemet 111 som vist i fig. 2B. on a housing part where the pipe part is slidably arranged, the bottom valve pipe part 173 telescopically enters the upper end part of the bottom packing core part 150 in the annulus safety valve housing, as shown in fig. 2G. The springs 175 work together to provide an upwardly directed valve closing force on the valve tube 90, thereby pressing the valve seat 120 on the valve body 114 against the valve seat surface 112 on the valve seat body 111 as shown in fig. 2B.

Ved komplettering av en brønn hvor sikkerhetsventilen 32 skal benyttes, blir røret 20 som vist i fig. IA og IB ført ned i brønnhullet som en på forhånd ved overflaten sammensatt enhet. De øvre og nedre hylseventiler 33 og 35 tilkobles på hver sin side av pakningen 34 i rørstrengen som strekker seg opp til brønnhodet 15 ved overflaten. Under sammensetningen av hylseventilene før de settes inn i rørstrengen, innstilles til-idekningen 51 i hver hylseventil slik ved hjelp av betjenings-knapphylsen 53 og mutteren 56, som er skrudd på tildekningens reduserte parti 52, at betjeningsknasthylsens53 stilling i forhold til tildekningens endeflate 75 innreguleres. En bevegelse av knasthylsen 53 på gjengepartiet på tildekningen vil^påvirke stillingen av knastene 54 i forhold til endeflaten 75, slik at endeflaten 75 kan ligge lett an mot sideportflaten 80 når tildekningen er lukket. Knastene 54 ekspanderer når tildekningen er lukket, slik at hver knasts nedre utvendige skrå-flate samvirker med skråskulderen 62 i hylseventil-husdelen 46. Hylseventilene 33 og 35 settes inn i rørstrengen i lukket stilling, med såvel tildekning 51 og hylseventillegemet 63 i øvre.endesti Ilinger (ikke vist). Sideportene i hylseventilen er lukket og betjeningsknastene 54 er ekspandert mot skulderen 62 inne i løpet 60 i husdelen 46, slik at utsparingen 62 vil ligge over knastene 54, med rørets 71 med større diameter ut-førte parti liggende under utsparingen 72 hvorved knastene holdes utover i en stilling hvor tildekningen er lukket og låst. I denne tilstand for glidehylseventilen vil den øvre endekant 79 på ventillegemet 6 3 ligge an mot stoppskulderen 81 i hylseventilhuset. Såvel øvre som nedre hylseventil monteres i røret og.føres ned i brønnhullboringen i lukket tilstand. When completing a well where the safety valve 32 is to be used, the pipe 20 as shown in fig. IA and IB led down into the wellbore as a unit assembled in advance at the surface. The upper and lower sleeve valves 33 and 35 are connected on each side of the packing 34 in the pipe string which extends up to the wellhead 15 at the surface. During the assembly of the sleeve valves before they are inserted into the pipe string, the cover 51 is set in each sleeve valve so that with the help of the operating button sleeve 53 and the nut 56, which is screwed onto the reduced part 52 of the cover, the position of the operating cam sleeve 53 in relation to the end surface 75 of the cover is adjusted . A movement of the cam sleeve 53 on the threaded portion of the cover will affect the position of the cams 54 in relation to the end surface 75, so that the end surface 75 can rest lightly against the side port surface 80 when the cover is closed. The cams 54 expand when the cover is closed, so that the lower external inclined surface of each cam cooperates with the inclined shoulder 62 in the sleeve valve housing part 46. The sleeve valves 33 and 35 are inserted into the pipe string in the closed position, with both the cover 51 and the sleeve valve body 63 in the upper end path Ilinger (not shown). The side ports in the sleeve valve are closed and the operating cams 54 are expanded against the shoulder 62 inside the barrel 60 in the housing part 46, so that the recess 62 will lie above the cams 54, with the part of the pipe 71 with a larger diameter lying below the recess 72, whereby the cams are held outwards in a position where the cover is closed and locked. In this condition for the sliding sleeve valve, the upper end edge 79 of the valve body 6 3 will rest against the stop shoulder 81 in the sleeve valve housing. Both upper and lower sleeve valves are mounted in the pipe and guided down into the wellbore in the closed state.

Under nedføringen av røret i brønnhullet benyttes vanlige stan-dardprosedyrer. Normal standard procedures are used during the lowering of the pipe into the wellbore.

Når røret 20 er kommet til ønsket dybde i brønnhullet, med pakningen 34 plassert over den øvre sone som skal produseres i en tosone-brønn, settes pakningen 34 på plass ved hjelp av hydrauliske midler. Det benyttes standard fastsettingsprose-dyre som kan innbefatte oppbygging av et tilstrekkelig hydraulisk trykk i røret til en dybde under den interne pakning-sideport 180, slik at det hydrauliske fluidumtrykk kan forplante seg ut fra boringen eller løpet i røret og inn i ringkaitmeret 181 i pakningen, for derved å presse ringstemplet 182 nedover, med ekspansjon av pakningen 183 og en driving av innstillings-konusen 184 ned bak fangkilene 185.Fangkilene ekspanderer inn i innerveggen i foringsrøret 14, hvoretter pakningen 183 kompri-meres og ekspanderer til tettende samvirke med f6ringsrørveggen. Etter at pakningen er satt på plass vil fangkilene 190 i pakningen låse pakningen i fastsatt stilling. Videre detaljer vedrørende fastsettingen av pakningen finner man på side 3945 When the pipe 20 has reached the desired depth in the wellbore, with the packing 34 placed above the upper zone to be produced in a two-zone well, the packing 34 is put in place by means of hydraulic means. A standard fixing procedure is used which may include building up a sufficient hydraulic pressure in the pipe to a depth below the internal packing side port 180, so that the hydraulic fluid pressure can propagate out from the bore or barrel in the pipe and into the annulus 181 in the packing , thereby pushing the ring piston 182 downwards, with expansion of the gasket 183 and a driving of the setting cone 184 down behind the catch wedges 185. The catch wedges expand into the inner wall of the casing 14, after which the gasket 183 is compressed and expands into a sealing cooperation with the casing wall. After the gasket has been put in place, the catch wedges 190 in the gasket will lock the gasket in a fixed position. Further details regarding the fixing of the gasket can be found on page 3945

i 1974-75-utgaven av den foran nevnte katalog.in the 1974-75 edition of the aforementioned catalogue.

Etter nedføringen av røret 2 0 og fastsettingen a<y>pakningen 34, monteres ringrom-sikkerhetsventilen 32. Sikkerhetsventilen bæres av et vaierverktøy som samvirker med oppfiskingskraven 96 på den øvre ende av låse-kjernedelen 92 for bæring av sikkerhetsventilen med vaierverktøyet. Det benyttes standard-vaierprosedyrer for å senke sikkerhetsventilen ned igjennom røret til den stilling som er vist på tegningene, hvilken stilling låse-kjernedelen samvirker med og låser i landingsnippelen 31 for derved å bære sikkerhetsventilen i arbeids-stillingen i røret. Når sikkerhetsventilen senkes ned i røret vil betjeningskilen 152 på den nedre enden av sikkerhetsventilen få samvirke med den øvre glidehylse 33 og betjeningskilene 160 vil gå nedover helt til kilene er innrettet med profilen 73 i den nedre endedel av hylseventil-betjenings-røret 71. Profilen 73 har oppadrettede stoppskuldre som samvirker med nedadrettede stoppskuldre på kilene 160 og hindrer betjeningskilene i å bevege seg ned forbi profilen 73. Når betjeningskilen legges nedover og ekspanderer inn i profilen 74 i hylseventillegemet 63, vil de skrå oppadrettede skuldre på profilen 74 bevirke at betjeningskilene 16 0 kamstyres innover til tilbaketrukne stillinger slik at kilene ikke vil forbli i samvirke med profilen 74. De rett avskårne skuldre på den nedre betjeningsprofil 73 vil imidlertid samvirke med kilen 160 og en videre nedadrettet bevegelse av sikkerhetsventilen vil da tvinge glidehylseventil-betjeningsrøret 71 nedover. Først trekkes hylseventilen 71 med hylseventillegemet 6 3 nedover , idet 0-ringen 6 4 på ventillegemet 6 3 beveger seg over endeflaten 75 på tildekningen 51, som samvirker med sideportflaten 80, slik at 0-ringen 64 ikke utsettes 'for strømningspåkjenninger ved en bevegelse til den åpne stilling. Etter at 0-ringen 6 4 har beveget seg inn i tildekningen 51, vil utsparingen 72 i betjeningsrøret 71 bevege seg til innretning med knastene 54 slik at knastene kan bevege seg innover og frigjøre seg fra skulderen 62. Derved frigjøres'tildekningen 51, som så trekkes til den åpne stilling i fig.233 som følge av koblingen mellom tildekningens betjeningsknast- hylse 53, knastene 54 og betjeningsrøret 71. Når betjenings-røret når den nedre endestilling vil skråskulderne på kilenes 160 nedre ender samvirke med skråskulderen i hylseventilhuset 46 under den nedre enden av røret 71 og kamstyre betjeningskilene innover, hvorved kilene frigjøres fra profilen 73 slik at kilene kan fortsette nedover gjennom pakningsløpet og inn i den nedre glidehylseventil 35. Kilene 160 beveger seg nedover igjennom den nedre glidehylseventil og åpner ventillegemet og tildekningen i den nedre hylseventil, hvoretter kilene beveger seg til en stilling i røret under den nedre hylseventil, som vist i fig. 2H. Etter at betjeningskilene 160 har åpnet og er ført ned under den nedre glidehylseventil, vil låse-kjernedelen 92 i den øvre enden av ringrom-sikkerhetsventilen være innrettet i forhold til landings- og låseutsparingen 40 After lowering the pipe 20 and securing the gasket 34, the annulus safety valve 32 is mounted. The safety valve is carried by a wire tool which cooperates with the fishing collar 96 on the upper end of the locking core part 92 for carrying the safety valve with the wire tool. Standard cable procedures are used to lower the safety valve down through the pipe to the position shown in the drawings, which position the locking core part cooperates with and locks in the landing nipple 31 to thereby carry the safety valve in the working position in the pipe. When the safety valve is lowered into the pipe, the operating wedge 152 on the lower end of the safety valve will cooperate with the upper sliding sleeve 33 and the operating wedges 160 will go down until the wedges are aligned with the profile 73 in the lower end part of the sleeve valve operating tube 71. The profile 73 has upwardly directed stop shoulders that cooperate with downwardly directed stop shoulders on the wedges 160 and prevent the operating wedges from moving down past the profile 73. When the operating wedge is placed downward and expands into the profile 74 in the sleeve valve body 63, the inclined upwardly directed shoulders on the profile 74 will cause the operating wedges 16 0 cam is steered inwards to retracted positions so that the wedges will not remain in cooperation with the profile 74. The straight-cut shoulders on the lower operating profile 73 will, however, cooperate with the wedge 160 and a further downward movement of the safety valve will then force the slide sleeve valve operating tube 71 downwards. First, the sleeve valve 71 with the sleeve valve body 6 3 is pulled downwards, the 0-ring 6 4 on the valve body 6 3 moving over the end surface 75 of the cover 51, which cooperates with the side port surface 80, so that the 0-ring 64 is not exposed to flow stresses during a movement to the open position. After the 0-ring 6 4 has moved into the cover 51, the recess 72 in the operating tube 71 will move into alignment with the cams 54 so that the cams can move inwards and free themselves from the shoulder 62. Thereby the cover 51 is released, which then is pulled to the open position in fig.233 as a result of the connection between the cover's operating cam sleeve 53, the cams 54 and the operating tube 71. When the operating tube reaches the lower end position, the inclined shoulders on the lower ends of the wedges 160 will cooperate with the inclined shoulder in the sleeve valve housing 46 below the lower the end of the tube 71 and the cam guide the operating wedges inwards, whereby the wedges are released from the profile 73 so that the wedges can continue down through the packing race and into the lower sliding sleeve valve 35. The wedges 160 move down through the lower sliding sleeve valve and open the valve body and the cover in the lower sleeve valve, after which the wedges move to a position in the pipe below the lower sleeve valve, as shown in fig. 2H. After the operating wedges 160 have opened and are passed down under the lower slide sleeve valve, the locking core portion 92 at the upper end of the annulus safety valve will be aligned with the landing and locking recess 40

i landingsnippelen 31. Låsekilene ekspanderer inn i landings-nippelens utsparing og låser sikkerhetsventilen i arbeids-stillingen som vist i fig. 2A-2H. I denne stilling vil glide-hy lseventilene være låst i åpen stilling, og ringrom-sikkerhetsventilen er lukket. in the landing nipple 31. The locking wedges expand into the landing nipple's recess and lock the safety valve in the working position as shown in fig. 2A-2H. In this position, the sliding sleeve valves will be locked in the open position, and the annulus safety valve is closed.

Etter at sikkerhetsventilen 32 er montert i røret 20 benyttes igjen konvensjonell vaierteknikk- og utstyr for montering av rør-sikkerhetsventilen 30 i landingsnippelen 25 i rørstreng^systemet over ringrom-sikkerhetsventilen, for også å få en sikkerhetsventil i rørstrengen.Ringrom-sikkerhetsventilen vil således ha en sikkerhetsventilfunksjon for brønnfluider som produseres gjennom brønnringrommet, mens rør-sikkerhetsventilen 30 har en sikkerhetsventil-funksjon for brønnfluider som produseres gjennom rørstrengen. I noen tilfeller kan en ^enkelt produksjonsformasjon strømme gjennom såvel ringrommet som røret. Andre ganger kan brønnhullet kompletteres for produksjon av to separate formasjoner, én gjennom røret og én gjennom ringrommet. I begge tilfeller vil tilstedeværelsen av ringrom-sikkerhetsventilen og rør-sikkerhetsventilen gi sikkerhetsventil-funksjoner for brønnfluidum som produseres gjennom såvel røret som ringrommet. Ringrom-sikkerhetsventilen åpnes for produksjon gjennom brønn-hullets ringrom ved å overføre et hydraulisk fluidumtrykk gjennom ledningen 24, inn i brønnhodet, og videre ned i brønn-hullet, gjennom styreledningen 24 til sidekoblingen 42, hvor-fra styrefluidet strømmer til passasjen 43 og inn i ringkam-meret 101 som står i forbindelse med ringrom-sikkerhetsventil-stempelkammeret 104 over betjeningsstemplet 105. Når styrefluidumtrykket økes i kammeret 104 vil det ringformede stempel 10 5 presses nedover og samvirke med flensen 110 på den øvre endedel 106 av betjeningsrør-enheten 90. Stemplet 105 pumpes nedover hydraulisk og beveger hele betjeningsrør-enheten 90 nedover mot fjærene 165. Fjærene trykkes sammen helt til ringrom-sikkerhetsventildelen 114 kommer til den nedre åpne stilling i fig. 3B, i hvilken stilling ventillegeme-seteflaten 120 ligger i en avstand under husets seteflate 112. I denne åpne stilling av ringrom-sikkerhetsventillegemet vil brønnfluider i brønnring-rommet under pakningens tetningsenhet 183 strømme innover gjennom sideporten 50 i den nedre glidehylseventil 35 og forbi den åpne hylseventil-tildekning 51 og gjennom porten 70 i ventillegemet 63 og inn i boringen gjennom ventillegemet. Ringromfluidene strømmer oppover i den nedre glidehylseventil og inn i den ringformede strømningspassasje 145 i pakningen rundt ringrom-sikkerhetsventilens husdeler 142. Over pakningen vil ringrom-fluidene strømme innover til huset i ringrom-sikkerhetsventilen, gjennom portene 134 og oppover i strømningspassasjene 135 og 131, til portene 122 i sikkerhetsventilen. Fra portene 122 går ringromsfluidet innover og oppover gjennom passasjen 153 i ventillegemet 114, rundt betjeningsrørets øvre endedel 106 helt til fluidene når det øvre endesete 120 i den åpne ringrom-sikkerhetsventil, som vist i fig. 2B. Ringromfluidene strømmer oppover forbi det åpne ringrom-sikkerhetsventil-legeme, gjennom sideporten 125 og gjennom den øvre glidehylseventil 33 og gjennom pottene 70 i hylseventillegemet 63, After the safety valve 32 has been mounted in the pipe 20, conventional wiring techniques and equipment are again used for mounting the pipe safety valve 30 in the landing nipple 25 in the pipe string system above the annulus safety valve, in order to also get a safety valve in the pipe string. The annulus safety valve will thus have a safety valve function for well fluids produced through the well annulus, while the pipe safety valve 30 has a safety valve function for well fluids produced through the pipe string. In some cases, a single production formation can flow through both the annulus and the pipe. Other times, the wellbore can be completed to produce two separate formations, one through the pipe and one through the annulus. In both cases, the presence of the annulus safety valve and the pipe safety valve will provide safety valve functions for well fluid that is produced through both the pipe and the annulus. The annulus safety valve is opened for production through the wellbore's annulus by transferring a hydraulic fluid pressure through the line 24, into the wellhead, and further down the wellbore, through the control line 24 to the side coupling 42, from where the control fluid flows to the passage 43 and into in the annular chamber 101 which is in connection with the annulus safety valve piston chamber 104 above the operating piston 105. When the control fluid pressure is increased in the chamber 104, the annular piston 105 will be pressed downwards and cooperate with the flange 110 on the upper end part 106 of the operating tube unit 90. The piston 105 is pumped downwards hydraulically and moves the entire operating tube unit 90 downwards towards the springs 165. The springs are compressed until the annulus safety valve part 114 comes to the lower open position in fig. 3B, in which position the valve body seat surface 120 is at a distance below the housing seat surface 112. In this open position of the annulus safety valve body, well fluids in the well annulus space below the packing sealing unit 183 will flow inward through the side port 50 in the lower slide sleeve valve 35 and past the open sleeve valve cover 51 and through the port 70 in the valve body 63 and into the bore through the valve body. The annulus fluids flow upward into the lower slide sleeve valve and into the annular flow passage 145 in the gasket around the annulus safety valve housing parts 142. Above the gasket, the annulus fluids will flow inward to the annulus safety valve housing, through the ports 134 and up into the flow passages 135 and 131, to the ports 122 in the safety valve. From the ports 122, the annulus fluid goes inwards and upwards through the passage 153 in the valve body 114, around the operating tube's upper end part 106 until the fluids reach the upper end seat 120 in the open annulus safety valve, as shown in fig. 2B. The annulus fluids flow upwards past the open annulus safety valve body, through the side port 125 and through the upper slide sleeve valve 33 and through the pots 70 in the sleeve valve body 63,

og videre forbi den åpne tildekning 51 og tilbake til brønn-hullets ringrom over pakningen, gjennom ;sideportene 50 i den øvre hylseventil. Ringromfluidene kan så strømme opp til and further past the open cover 51 and back to the well-hole annulus above the gasket, through the side ports 50 in the upper sleeve valve. The annulus fluids can then flow up to

overflaten til brønnhodet gjennom ringrommet 21 over pakningen og tilutløpet 22 i brønnhodet. the surface of the wellhead through the annulus 21 above the gasket and the outlet 22 in the wellhead.

Styrefluidumledningen 34 gir trykk til ringrom-sikkerhetsventilen for holding av ventilen i åpen tilstand, mot virkningen til ventilens fjærer, og denne ledning kan tilknyttes et hvilket som helst antall ulike sikkerhetssystemer som reagerer på endringer i operasjonstilstander såsom trykktap, brann og lignende som vil kreve stenging av brønnen. The control fluid line 34 provides pressure to the annulus safety valve for holding the valve in the open state, against the action of the valve's springs, and this line can be connected to any number of different safety systems that respond to changes in operating conditions such as pressure loss, fire and the like that will require closure of the well.

Også fysiske skader på brønnhodet, som gir tap av styrefluidumtrykk, vil bevirke en lukking av ringrom-sikkerhetsventilen. Når styrefluidumtrykket til ringrom-sikkerhetsventilen reduseres av en eller annen grunn, enten med vilje eller i samsvar med overvåkingen av en sikkerhetstilstand, Physical damage to the wellhead, which causes a loss of control fluid pressure, will also cause the annulus safety valve to close. When the control fluid pressure of the annulus safety valve is reduced for any reason, either intentionally or in accordance with the monitoring of a safety condition,

vil det reduserte trykk i kammeret 104, hvor stempelet 105 presses nedover, tillate at betjeningsstempelet beveger seg oppover slik at fjærene 175 ekspanderer og løfter betjenings-rørenheten 90 oppover'©g lukker ventilen. Ventilen er lukket når seteflaten 120 på den øvre enden av ventillegemet 114 samvirker med den nedadrettede seteflate 112 på ventilsetelegemet 111 i ringrom-sikkerhetsventilhuset. Når ring-romsikkerhetsventilen er helt lukket kan ringromfluidet ikke produseres gjennom ventilen, forbi pakningen. Ventilens ringrom er således stengt. the reduced pressure in the chamber 104, where the piston 105 is pressed downwards, will allow the operating piston to move upwards so that the springs 175 expand and lift the operating tube assembly 90 upwards and close the valve. The valve is closed when the seat surface 120 on the upper end of the valve body 114 cooperates with the downwardly directed seat surface 112 on the valve seat body 111 in the annulus safety valve housing. When the annulus safety valve is fully closed, the annulus fluid cannot be produced through the valve, past the packing. The annulus of the valve is thus closed.

Dersom det oppstår brønnhulltilstander som gjør det ønskeligIf wellbore conditions occur that make it desirable

å kunne pumpe fluider ned gjennom brønnens ringrom kan ring-romsikkerhetsventilen pumpes til åpen tilstand slik at derved fluider kan pumpes forbi pakningen og ned i brønnhullet under pakningen. Med ringrom-sikkerhetsventilen lukket som vist i fig. 2A-2H pumpes fluidum under trykk ned i brønnhullets ringrom 21 og inn i sideportene 50 i den øvre glidehylseventil 33. Fluidet går gjennom den åpne tildekning og det åpne ventillegeme 6 3 i hylseventilen og videre til sideporten 125 i ringrom-sikkerhetsventilhusets del 124. Trykket virker over et ringområde 1 delen 114, mellom tetningslinjen til to be able to pump fluids down through the annulus of the well, the annulus safety valve can be pumped to an open state so that fluids can thereby be pumped past the packing and down into the wellbore below the packing. With the annulus safety valve closed as shown in fig. 2A-2H, fluid under pressure is pumped down into the wellbore annulus 21 and into the side ports 50 in the upper slide sleeve valve 33. The fluid passes through the open cover and the open valve body 6 3 in the sleeve valve and on to the side port 125 in the annulus safety valve body part 124. The pressure acts over a ring area 1 part 114, between the sealing line to

O-ringen 130 mot innerveggen i husdelen 124 under porten 25 og tetningslinjen mellom ventilhuspakningen 112 og ventillegemets sete 120. Trykket over dette ringområde beveger ventilrør-enheten 90 nedover mot virkningen til fjærene 175 og åpner ventillegemet for fluidumstrøm i motsatt retning, ned gjennom de tidligere beskrevne ringformede strøm-ningspassas jer gjennom pakningen og den nedre glidehylseventil 35, hvorigjennom fluidene strømmer inn i brønnrommets ringrom under pakningen. Så snart ringrom-sikkerhetsventilen åpner vil pumpetrykket virke på ventilbetjeningsstempelet 105. Fordi betjeningsstempelet 105 er fritt svømmende i forhold til ventil-betjeningsrør-enhetens øvre endedel 106 vil betjeningsstempelet 105 helt enkelt pumpes oppover til den øvre endestilling som er vist i fig. 2A. Betjeningsrør-enheten 9 0 vil da fritt kunne pumpes nedover til den åpne stilling. Det skal her bemerkes at fjærene 175 naturligvis fortsetter å utøve en oppadrettet kraft på ventilbetjenings-rør-enheten 90 og forsøker å lukke ventilen. Under den nedadrettede fluidumpumping vil således betjeningsrør-enheten ha en tendens til å bevege seg oppover og nedover, med til-hørende åpning og lukking av ventilen. Når den nedadrettede pumping stoppes vil fjærene bevirke full lukking igjen av ringrom-sikkerhetsventilen. The O-ring 130 against the inner wall of the housing part 124 below the port 25 and the sealing line between the valve housing gasket 112 and the valve body seat 120. The pressure above this ring area moves the valve tube assembly 90 downwards against the action of the springs 175 and opens the valve body for fluid flow in the opposite direction, down through the former described annular flow passages through the packing and the lower sliding sleeve valve 35, through which the fluids flow into the annulus of the well space below the packing. As soon as the annulus safety valve opens, the pump pressure will act on the valve operating piston 105. Because the operating piston 105 is free-floating in relation to the upper end part 106 of the valve-operating pipe unit, the operating piston 105 will simply be pumped upwards to the upper end position shown in fig. 2A. The operating pipe unit 90 will then be able to be freely pumped down to the open position. It should be noted here that the springs 175 naturally continue to exert an upward force on the valve operating tube assembly 90 and attempt to close the valve. During the downward fluid pumping, the operating tube unit will thus tend to move upwards and downwards, with associated opening and closing of the valve. When the downward pumping is stopped, the springs will cause the annulus safety valve to fully close again.

Ved fjerning av ringrom-sikkerhetsventilen 32 gjenvinner man først rør-sikkerhetsventilen 30 ved hjelp av wireteknikk. Styrefluidumtrykket i ledningen 24 reduseres, slik at ringrom-sikkerhetsventilen lukkes, under påvirkning av fjærene 175. When removing the annulus safety valve 32, the pipe safety valve 30 is first recovered using wire technology. The control fluid pressure in the line 24 is reduced, so that the annulus safety valve is closed, under the influence of the springs 175.

Et egnet trekkverktøy føres spå ned i røret 20 ved hjelp av en wire, med samvirke med oppfiskingshalsen 96 i ringrom-sikkerhetsventilen 32. En oppadrettet kraft på oppfiskingshalsen frigjør låse-kjernedelen 92 fra landingsnippelen 31. Etter frigjøring av sikkerhetsventilens låse-kjernedel løftes sikkerhetsventilen opp, idet betjeningskilene 160 på den nedre enden av sikkerhetsventilen vil slepe langs innerveggen i rørstrengen, helt til kilene fluket med profilen 7 langs den øvre endedel av ventillegemet 6 3 i den nedre glidehylseventil 35. Når betjeningskilene 160 passerer profilen 73 i den nedre enden av betjeningsrøret 71 i hylseventilen vil kilene helt enkelt ekspandere utover og inn i profilen og de kamstyres umiddelbart tilbake innover og ut av profilen som følge av samvirket mellom de oppadrettede skrå skuldre på kilene og de nedadrettede skråskuldre langs profilen 73. Når kilene når profilen 74 vil imidlertid den nedadrettede rett avskårne skulder få samvirke med den rett avskårne, oppadrettede skulder på kilene 160, slik at kilene samvirker med profilen 74 i ventillegemet 63. En fortsatt oppadrettet kraft i trekkverktøyet vil bevirke en løfting av ventillegemet 63. Knastene 54 går til samvirke med utsparingen 72 i røret 71. Når knastene 54 løftes vil røret 53, som er forbundet med tildekningen 51, løftes og bevege tildekningen oppover helt til tildekningens øvre endeflate 75 får samvirke med vindusflaten 80 i hylseventilhuset. Tildeknigens øvre endekant beveger seg foran O-ringen 64 i ventillegemet 63, slik at tildekningen lukker før O-ringen krysser tetningslinjen mellom tildekningen og vindusflaten 80 i huset til ventilen. Når knastene 54 går over skulderen 62 i ventilhuset, kamstryes knastene utover og inn i det større løp 60 og ut av utsparingen 72 i røret 71, slik at røret 71 og ventillegemet 63 frigjøres av knastene, for fortsatt bevegelse oppoverhelt til den øvre endekam 79 på ventillegemet 6 3 treffer stoppskulderen 81 inne i ventilhuset. I denne lukkede stilling av ventillegemet 63 vil O-ringen 64 ligger over tetningslinjen mellom tildekningen og husets vindusflate 80, mens O-ringen 65 befinner seg under denne tetningslinje og derfor stenger sideportene i den nedre hylseventil 35. Når kilenes 160 skrå endeflater beveger seg over skulderen 81 A suitable pulling tool is lowered into the pipe 20 by means of a wire, in cooperation with the catch-up neck 96 in the annulus safety valve 32. An upward force on the catch-up neck releases the locking core part 92 from the landing nipple 31. After releasing the safety valve's locking core part, the safety valve is lifted up , as the operating wedges 160 on the lower end of the safety valve will drag along the inner wall of the pipe string, until the wedges are flush with the profile 7 along the upper end part of the valve body 6 3 in the lower sliding sleeve valve 35. When the operating wedges 160 pass the profile 73 at the lower end of the operating pipe 71 in the sleeve valve, the wedges will simply expand outwards and into the profile and they are cam-controlled immediately back inwards and out of the profile as a result of the cooperation between the upwardly directed inclined shoulders on the wedges and the downwardly directed inclined shoulders along the profile 73. When the wedges reach the profile 74, however, the downward straight cut shoulder get cooperation with the straight cut ne, upwardly directed shoulder on the wedges 160, so that the wedges interact with the profile 74 in the valve body 63. A continued upward force in the pulling tool will cause a lifting of the valve body 63. The cams 54 engage with the recess 72 in the tube 71. When the cams 54 are lifted the pipe 53, which is connected to the cover 51, is lifted and the cover moved upwards until the cover's upper end surface 75 interacts with the window surface 80 in the sleeve valve housing. The cover's upper end edge moves in front of the O-ring 64 in the valve body 63, so that the cover closes before the O-ring crosses the sealing line between the cover and the window surface 80 in the housing of the valve. When the cams 54 go over the shoulder 62 in the valve housing, the cams are pushed outwards and into the larger barrel 60 and out of the recess 72 in the tube 71, so that the tube 71 and the valve body 63 are released by the cams, for continued movement all the way up to the upper end cam 79 on the valve body 6 3 hits the stop shoulder 81 inside the valve housing. In this closed position of the valve body 63, the O-ring 64 will lie above the sealing line between the cover and the housing's window surface 80, while the O-ring 65 is below this sealing line and therefore closes the side ports in the lower sleeve valve 35. When the inclined end surfaces of the wedges 160 move over the shoulder 81

i ventilhuset vil kilene 16 0 kamstyres innover og frigjøre kilene fra ventillegemet 63. Fortsatt oppadrettet kraft på trekkverktøyet vil løfte ringrom-sikkerhetsventilen gjennom in the valve housing, the wedges 16 0 will cam inward and release the wedges from the valve body 63. Continued upward force on the pulling tool will lift the annulus safety valve through

I pakningen 34 og den øvre glidehylseventil 33, helt til betjeningskilene 160 på den nedre endenav ringrom-sikkerhetsventilen In the gasket 34 and the upper slide sleeve valve 33, all the way to the operating wedges 160 on the lower end hub annulus safety valve

samvirker med og lukker den øvre glidehylseventil, på samme måte som kilene lukket den nedre glidehylseventil. Etter frigjøringen av kilene fra den øvre glidehylseventil trekkes ringrom-sikkerhetsventilen opp gjennom røret og opp til brønnhodet, hvor ventilen fjernes fra brønnen. cooperates with and closes the upper sliding sleeve valve, in the same way as the wedges closed the lower sliding sleeve valve. After releasing the wedges from the upper sliding sleeve valve, the annulus safety valve is pulled up through the pipe and up to the wellhead, where the valve is removed from the well.

Av det foregående vil det gå frem at det er tilveiebragtFrom the foregoing, it will appear that it has been provided

et nytt og forbedret ventilsystem for et brønnhull for styring av fluidumstrømmen i ringrommet mellom rørstrengen og brønnens foringsrør. Det vil videre gå frem at det er beskrevet og vist en ny og forbedret ringrom-sikkerhetsventil for bruk i et brønnhull. Det tør være klart at ventilsysternet innbefatter øvre og nedre glidehylseventiler for styring av en fluidumstrøm fra brønnens ringrom og inn i brønnens rør-streng over og under en brønnhullpakning, og en fjernbar ringrom-sikkerhetsventil som i sin operative stilling danner en ringformet strømningspassasje i rørstrengen, mellom den øvre ognedre glidehylseventil og innbefattende et ringformet ventillegeme i den ringformede strømningspassasje, for av-stenging av en fluidumstrøm langs en slik passasje mellom øvre og nedre glidehylseventil. Glidehylseventilene innbefatter en beskyttende tildekning som eliminerer strømnings-avskjæring av de pakninger som benyttes i ventilene. Ring-romsikkerhetsventilen innbefatter en utvendig pakning som forblir fiksert når ventilen er i sin operative stilling i rørstrengen, og innbefatter en innvendig ringpakning som er beskyttet mot strømningsavskjæring når ventilen åpnes og lukkes. Ringrom-sikkerhetsventilen åpnes ved hjelp av hydraulisk fluidumtrykk som tilføres gjennom en styreledhing fra overflaten, og ventilen lukkes ved hjelp av fjærkraft. Ringrom-sikkerhetsventilen innbefatter et svømmende betjeningsstempel som tillater ventilen å bli pumpet åpen, mot virkningen til lukkefjærkraften. Samvirket mellom ringrom-sikkerhetsventilen og glidehylseventilene i rørstrengen åpner glidehylseventilene når sikkerhetsventilen monteres og lukker hylseventilene når sikkerhetsventilen fjernes. Glidehylse- a new and improved valve system for a wellbore to control the fluid flow in the annulus between the pipe string and the well's casing. It will further be stated that a new and improved annulus safety valve for use in a wellbore has been described and shown. It should be clear that the valve system includes upper and lower sliding sleeve valves for controlling a fluid flow from the well annulus and into the well's tubing string above and below a wellbore seal, and a removable annulus safety valve which in its operative position forms an annular flow passage in the tubing string, between the upper and lower sliding sleeve valve and including an annular valve body in the annular flow passage, for shutting off a fluid flow along such a passage between the upper and lower sliding sleeve valve. The sliding sleeve valves include a protective cover that eliminates flow cut-off by the gaskets used in the valves. The annulus space safety valve includes an outer seal that remains fixed when the valve is in its operative position in the pipe string, and includes an inner ring seal that is protected against flow cutoff when the valve is opened and closed. The annulus safety valve is opened by means of hydraulic fluid pressure which is supplied through a control link from the surface, and the valve is closed by means of spring force. The annulus safety valve incorporates a floating operating piston which allows the valve to be pumped open against the action of the closing spring force. The cooperation between the annulus safety valve and the slide sleeve valves in the pipe string opens the slide sleeve valves when the safety valve is installed and closes the sleeve valves when the safety valve is removed. sliding sleeve-

ventilen innbefatter en tildekning som åpner etter at ventillegemet i hylseventilen er åpnet og lukker før ventillegemet i hylseventilen er lukket, slik at man derved får en beskyttelse for ventillegemets pakninger. Tildekningen betjenes ved hjelp av et knastsett som åpner, lukket og låser tildekningen. the valve includes a cover which opens after the valve body in the sleeve valve is opened and closes before the valve body in the sleeve valve is closed, so that protection for the valve body's gaskets is thereby obtained. The cover is operated using a knob set that opens, closes and locks the cover.

Claims

1. Wellbore tool system, characterized in that it includes a tubing string, a wellbore gasket in the tubing string for sealing around the tubing string in a wellbore annulus, a valve in the tubing string below the gasket for controlling the connection between the barrel in the tubing string and the annulus, a valve in the pipe string above the gasket for controlling the connection between the barrel in the pipe string and the annulus, and an annulus safety valve in the pipe string for controlling a first annulus flow along the pipe string, between the mentioned valves below and above the packing, and a pipe safety valve in the pipe string for controlling a second pipe string flow independently of the said first annulus flow .

2. Wellbore tool system according to claim 1, characterized in that the pipe safety valve and annulus safety valve can be removed from the pipe string.

3. Well-hole tool system according to claim 2, characterized in that the valves are connected to the pipe string above and below the packing and are designed to open when the annulus safety valve is installed, and to close when the annulus safety valve is removed.

4. Well-hole tool system according to claim 3, characterized in that both the annulus safety valve and the pipe safety valve are remotely controllable from the surface.

5. Well-hole tool system according to claim 4, characterized in that the annulus safety valve includes a housing and spaced gaskets along the housing, whereby an annular flow passage is formed through said gasket, between the valve which is connected to the pipe string below the gasket and the valve which is connected to the pipe string above the gasket.

6. Well-hole tool system according to claim 5, characterized in that the valves which are connected to the pipe string above and below the package are both a sliding sleeve valve.

7. Well-hole tool system according to claim 6, characterized in that each of the sliding sleeve valves includes a valve body and a cover intended for opening after the valve body has been opened and intended for closing before the valve body closes, thereby protecting a gasket on the valve body.

8. Wellbore tool system according to claim 7, characterized in that each of the sliding sleeve valves in the pipe string further includes: a housing with side ports for connection with the borehole annulus, the cover being slidable in the housing for opening and closing the side ports, an operating - pipe provided with side windows spaced along the perimeter and connected to the cover, radially movable operating knobs in the side windows for moving the cover between open and closed positions and for locking the cover in the closed position when the knobs are expanded and for holding the cover in the open position when the knobs are retracted, the housing having a stepped barrel which includes a first larger section provided with an annular stop shoulder for the cams when the cover is closed and a narrower barrel section for holding the cams inwards when the cover is open, the valve body being slidable inside the cover, between open and closed position, and has side windows that can be fitted with the ne said side ports in the said housing in the said open position, longitudinally spaced ring seals on the valve body, one of the said ring seals moving over one end of the cover when the cover is closed, which spaced seals lie on each side of the end of the cover when the cover is closed, an operating tube connected to the valve body and slidable in the cover's operating tube, which valve body operating tube has an outer annular recess for the cams to thereby allow the cams to move radially inward when the recess is flush with the cams, thus releasing the cams and enabling movement of the cover between open and closed positions, which valve body operating tube has an annular locking surface for movement behind the cams when the cams are expanded, thereby locking the cover in the closed position, and a stop device on the valve body operating tube for releasable locking of the valve body in the closed position ng and in the open position.

9. Wellbore tool system according to claim 8, characterized in that the annulus safety valve includes a tubular housing with a control fluid side port near the upper end, an annular gasket around the housing above and below the control fluid side port, wellbore fluid side ports below the said annular gasket below the control fluid side port, a central annular gasket below said wellbore fluid side ports, an annular gasket around the lower end portion thereof, below the lower slip sleeve valve when the annulus valve is in the tubing string, which housing has a reduced outer diameter between the central gasket on the housing and said gasket along the lower end of the housing , so that an annular fluid flow passage is thereby formed along the housing together with the inner wall of the pipe string when the annulus safety valve is in its operative position in the pipe string, through said packing, and fluid ports in the housing below the central packing, which housing includes an annular valve seat part with an annular valve seat near the wellbore fluid ports in the housing, a longitudinally movable valve tube unit arranged inside and concentrically in the housing, so that between the housing and the tube unit a control fluid chamber is formed in connection with the aforementioned control fluid control port in the housing and an annular wellbore fluid flow passage in connection with the wellbore fluid side ports in the housing and with the side ports in the housing below the central packing on the housing, an annular valve body along the valve tube assembly with a valve seat in cooperation with the valve seat body in the housing for closing the annulus safety valve, and movable to a position at a distance from the valve seat body to thereby open the safety valve, an annular piston between the valve tube assembly and the housing in the control fluid chamber and designed to cooperate with the valve tube assembly to open the annulus safety valve in accordance with the control fluid pressure in the chamber, and spring means hinge between the valve tube unit and the housing for closing the safety valve when the control fluid pressure is reduced below a certain value.

10. Annular safety valve for a well, characterized in that it includes wt tubular housing with a control fluid side port near the upper end, an annular packing around the housing above and below the control fluid side port, wellbore fluid side ports below said annular packing below the control fluid side port, a central annular gasket below said wellbore fluid side ports, an annular gasket around the lower end portion thereof, below the lower slip sleeve valve when the annulus valve is in the tubing string, which housing has a reduced outer diameter between the central gasket on the housing and said gasket along the lower end of the housing, such that an annular fluid flow passage is thereby formed along the housing together with the inner wall of the pipe string when the annulus safety valve is in its operative position in the pipe string, through the aforementioned gasket, and fluid ports in the housing below the central gasket, which housing includes an annular valve seat part with an annular valve seat near wellbore-fl the sump ports in the housing, a longitudinally movable valve tube unit arranged inside and concentrically in the housing, so that a control fluid chamber is formed between the housing and the tube unit in connection with the said control fluid control port in the housing and an annular wellbore fluid flow passage in connection with the wellbore fluid side ports in the housing and with the side ports in the housing below the central packing on the housing, an annular valve body along the valve tube assembly with a valve seat in cooperation with the valve seat body in the housing for closing the annulus safety valve, and movable to a position in a distance from the valve seat body to thereby open the safety valve, an annular piston between the valve tube assembly and the housing in the control fluid chamber and designed to cooperate with the valve tube assembly to open the annulus safety valve in accordance with the control fluid pressure in the chamber, and spring devices between the valve tube assembly and the housing to close the safety valve when the control fluid pressure is reduced un where a specific value.

11. Annular safety valve according to claim 10, characterized in that the spring device includes several longitudinally spaced springs between the valve tube unit and the housing, which springs press the valve tube unit in a direction for closing the valve body.

12. Annular chamber safety valve according to claim 11, characterized in that the ring piston in the control fluid chamber can be moved independently of the valve tube unit to cooperate with the valve tube unit when pumping in a direction for opening the valve and can be moved in an opposite direction freed from the valve tube unit to thereby allowing the valve tube assembly to be pumped in a valve opening direction in accordance with a fluid pressure supplied through the side ports in the housing.

13. Sliding sleeve valve for use in a wellbore pipe string for controlling the flow between the barrel in the pipe string and an annulus around the pipe string, characterized in that it includes a housing with side ports for connection with the wellbore annulus, a cover which is slidable in the housing for opening and closing of the side ports, an operating tube provided with circumferentially spaced side windows and connected to the cover, radially movable operating knobs in the side windows for moving the cover between open and closed positions and for locking the cover in the closed position when the knobs are expanded and for holding the cover in the open position when the cams are retracted, which housing has a stepped barrel which includes a first larger race portion provided with an annular stop shoulder for the cams when the cover is closed and a smaller race portion for holding the cams inward when the cover is open, which valve body is slidable in the cover between open and close silently ingog has side windows that can be brought flush with said side ports in the housing in the open position, longitudinally spaced ring gaskets on the valve body, one of these gaskets moving over one end of the cover when the cover is closed, and said spaced gaskets being located on each side of the end of the cover when the cover is closed, an operating tube connected to the valve body and slidable in the cover-operating tube, which valve body-operating tube has an external annular recess for the cams, so that the cams are thereby allowed to move radially inward when the recess is flush with the cams , so as to release the cams and the movement of the cover between the open and closed position, the valve body operating tube having an annular locking surface for movement behind the cams when the cams are expanded for locking the cover in the closed position, and a stop device on the valve body operating tube for releasable locking by valve doctor met in the closed position and in the open position.

14. Annular safety valve for a well, characterized in that it includes a tubular housing, a locking and core part connected to the first end of the tubular housing for releasably locking the safety valve in the pipe string in a wellbore at a landing nipple, a an external annular recess formed in the housing at a distance from the first end to thereby form a pilot fluid chamber around the housing when the safety valve is installed in a well pipe, a device that provides a pilot fluid port through the housing and into the annular recess, a first and second external annular seal around the housing on each side of the annulus, a device which provides a wellbore fluid side port in the casing at a distance from said second packing on the casing, located for device with a side port in a tubing string valve communicating through the tubing string with a wellbore annulus around the string when annulus- the safety valve is mounted in its operative position in the pipe string, a third central external ri ng packing around the housing, at a distance from said wellbore fluid side port in the housing for sealing around the housing against a wellbore tubing string wall, which second and third ring seals on the housing are on opposite sides of said wellbore fluid side port in the housing, a fourth outer ring seal on the housing along the other opposite end of the housing for sealing against a wellbore pipe wall around the housing, the housing having a reduced diameter between the third central gasket and said fourth gasket on the housing to thereby form an annular flow passage together with the wellbore pipe string wall, as that well fluids may be passed along said annular flow passage into the tubing string and through a packing engaged in the tubing string when the annulus safety valve is in its operative position in the tubing string, a device providing a port through the housing between the third central packing on the housing and the fourth packing on the housing to thereby connect the annular flow passage around the housing with the runner t through the house, a device forming an internal annular valve surface in the housing near said wellbore fluid side port in the housing, a longitudinally movable valve tube unit supported concentrically in the housing, a gasket in the housing around the valve tube unit at a first end of the valve tube unit and the first end of the housing, thereby forming a first end of a. side fluid ring cylinder around the valve tube unit in the housing, in connection with the control fluid port in the housing, an annular piston between the housing and the valve tube unit in the control fluid cylinder, which piston is movable in relation to both the housing and the valve tube unit, with an external ring-shaped operating flange which can cooperate with the ring piston to thereby move the valve tube assembly in accordance with control fluid introduced into the control fluid chamber in a direction for opening the valve, from the aforementioned first end of the housing and towards the aforementioned second end of the housing, the valve tube assembly including a tubular valve member fixed inside the housing along and at a distance from the valve tube assembly, so that an annular flow passage is formed between the valve tube assembly and the valve body, with an annular valve seat along the first end thereof, intended to cooperate with the said annular valve seat in the housing, and .provided with gating devices along a second thereof, for well fluid flow between an annular stream passage inside the valve body around the valve tube assembly and an annular flow passage between the body and the valve body, in from the ports in the valve body and to the ports in the body between said third and fourth annular gaskets on the body, a gasket around the valve body for sealing between the valve body and the body between said annular seat on the valve body and said ports in said other end of the valve body, which annular seat on the valve body forms a metal-to-metal seal with the seat in the internal annular valve seat surface of the housing when the valve tube assembly and the valve body are in the closed position, a gasket between the housing and the valve pipe assembly, located between the ports between the third and fourth O-rings on the housing and the other end of the housing, the housing and the valve pipe assembly each having stop shoulders between the housing and the valve pipe assembly, running along the housing and the valve pipe assembly between the gasket between the housing and the valve pipe assembly and the aforementioned other end of the housing, and a spring device in between m the housing and the valve tube assembly, in cooperation with the stop shoulders for pressing the valve tube assembly in the housing in a direction which presses the annular valve part in the valve tube assembly against the annular valve seat in the housing to a closed valve position.

15. Annular safety valve according to claim 14, characterized in that it includes an operating wedge device on said other end of the housing to cooperate with the valves in the wellbore pipe string, to open the valves when said annular safety valve is mounted in the pipe string, and to close the valves when the annular safety valve is removed from the wellbore tubing string.

16. Annular safety valve according to claim 15, characterized in that the spring device between the housing and the valve tube unit includes several springs which are placed in tandem for pressing the valve tube unit in a valve closing direction.

17. Sliding sleeve valve for connection in a wellbore pipe string for controlling the flow from around the pipe string and into the barrel through the pipe string, characterized in that it includes a housing which at the ends is designed for connection into the pipe string, a side port through the housing and into the barrel in the housing, an annular valve seat surface in the housing within the side port, an annular valve cover slidably mounted in the housing and having an end edge seat surface intended to cooperate with the annular seat surface in the housing, which cover covers the side port in the housing and is movable to a valve-open position in which side door is uncovered and the seat surface of the cover is spaced from the seat surface in the housing, a cover operating tube slidable in the housing and connected to the cover, which operating tube is provided with side windows, an arrangement of knobs for operating and controlling the cover and located in the side windows in the cover -bet jeningsroere , which covering operating pipe can be moved in a stepped nest ring in the housing, which bore has a larger diameter portion and a smaller diameter designed portion separated from each other by means of an internal ring-shaped cam lock shoulder that faces in the direction of the cover and is intended to cooperate with the cam device when the cover is closed and the cam device is expanded in the housing bore part designed with a larger diameter, as the cam device can be moved inwards along the mentioned smaller diameter part when the cover is open, a tubular valve part placed in a concentric sliding relationship in the cover. which valve part has side port devices flush with the housing side port devices when the valve part is open and out of flush with the housing side port device when the valve part is closed, the valve part having a stop shoulder designed to cooperate with a stop shoulder in the cover for retraction of the cover to an open position after the valve part is opened, outer annular, spaced gaskets on the valve member inside the cover and positioned to span the line of contact between the cover seating surface and the housing seating surface when the valve member and cover are closed, which spaced gaskets are drawn into the cover when the valve member is open, an operating tube connected to the valve member and placed concentrically in the cover and the cover-operating tube for opening and closing the valve part synchronously with the opening and closing of the cover, the valve-operating tube having an external annular recess for receiving internal parts of the said cover-operating cam device when the recess is flush with the cam assembly, thereby allowing the cam assembly to move radially inwardly when the valve member operating tube is retracted to open the valve member and cover, said recess on the valve member operating tube having cam shoulders for expanding the cam assembly in said larger diameter shaped bore portion in the housing, against the cam device stop shoulder in the housing when the valve part operating tube is moved to close the valve part, the valve part operating tube having an external annular locking surface near the said external ring recess for holding the cam device expanded when the operating tube is moved to close the valve part and the external ring recess is brought out of alignment with the cam device, whereby the cover and the valve part are closed and the cover is locked in the closed state, an internal operating wedge recess in the valve part-operating tube and in the valve part for cooperation with an operating wedge for opening and closing the sliding sleeve valve, and a stop device on the valve part-operating tube intended for cooperation with locking recesses along the housing for releasable locking of the valve part in the closed and open position.

18. Sliding sleeve valve according to claim 17, characterized in that the stop device includes several catch fingers designed along the valve body operating tube, each such catch finger)) having an external ring-shaped locking boss for cooperation with the locking recess in the valve housing.

19. Sliding sleeve valve according to claim 18, characterized in that the cover-operating tube is movable on the cover for setting the distance between the cover-seat surface and the housing-seat surface near the aforementioned side port in the housing.