NO840063L

NO840063L - CALL PROTECTION VALVE

Info

Publication number: NO840063L
Application number: NO840063A
Authority: NO
Inventors: William M Taylor
Original assignee: Cameron Iron Works Inc
Priority date: 1983-01-10
Filing date: 1984-01-09
Publication date: 1984-07-11
Also published as: JPS59126891A; EP0113413A3; EP0113413A2

Description

Ring-sikringsventiler mot utblåsning har lenge vært anvendt som et hjelpemiddel for å holde trykket i brønn-borehull under kontroll, og de omfatter i hovedsaken et ventilhus med et indre kantparti og et ytre kantparti, en øvre platering som er festet i det ytre kantparti med en sentral boring som strekker seg gjennom ventilhuset og plateringen med en ringformet pakningsutsparing som vender mot den sentrale boring idet plateringen danner pakningsutsparingens øvre overflate, en pakning i ut-sparingen og en innretning for å påvirke pakningen til stengt stilling, enten mot seg selv eller mot et rørformet element som strekker seg gjennom den sentrale boring. Ulike midler er blitt brukt til å feste plateringen i ventilhusets ytre kantparti, Ring safety valves against blowout have long been used as an aid to keep the pressure in well boreholes under control, and they mainly comprise a valve body with an inner edge part and an outer edge part, an upper plating which is fixed in the outer edge part with a central bore extending through the valve body and the plating with an annular packing recess facing the central bore, the plating forming the upper surface of the packing recess, a packing in the recess and a device for influencing the packing to a closed position, either against itself or against a tubular member extending through the central bore. Different means have been used to fasten the plating in the outer edge of the valve housing,

for eksempel en gjengeforbindelse som vist i US-patent nr. 4.310.139, paler som påvirkes av en stempelstyrt kam til låse-inngrep med kantpartiet som vist i US-patent nr. 3.741.295. for example, a threaded connection as shown in US Patent No. 4,310,139, pawls which are actuated by a piston-operated cam for locking engagement with the edge portion as shown in US Patent No. 3,741,295.

Det er ikke tidligere foreslått å kombinere trykkpåvirket It has not previously been proposed to combine the pressure effect

og manuell bevegelse fra og til lukket stilling for plateringen i ventilhuset. and manual movement from and to the closed position for the plating in the valve housing.

Foreliggende oppfinnelse angår en forbedret ring-sikringsventil som har et ventilhus med indre og ytre oppadstående kantpartier, en øvre platering med organer for befestigelse til det øvre parti av det ytre kantparti, hvilke festeorganer er manuelt påvirkbare eller reagerer på fluidtrykk, en sentral boring gjennom ventilhuset og den øvre platering, en pakningsutsparing som omgir og munner ut på den sentrale boring, en fjærende pakning i pakningsutsparingen, og trykkpåvirkbare organer for å bevege pakningen til stengt stilling. The present invention relates to an improved ring safety valve which has a valve body with inner and outer raised edge portions, an upper plating with means for attachment to the upper part of the outer edge portion, which attachment means are manually actuable or responsive to fluid pressure, a central bore through the valve body and the upper plating, a gasket recess surrounding and opening onto the central bore, a resilient gasket in the gasket recess, and pressurizable means for moving the gasket to the closed position.

Et formål med foreliggende oppfinnelse er å tilveiebringe An object of the present invention is to provide

en forbedret ring-sikringsventil med en topp-platering som lett og hurtig kan festes både ved fjernstyring og manuelt. an improved ring safety valve with a top plating that can be easily and quickly fixed both by remote control and manually.

Ovennevnte samt andre formål og fordeler skal i det føl-gende beskrives nærmere under henvisning til tegningene hvor: figur 1 er et oppriss av den forbedrede ring-sikringsventil ifølge foreliggende oppfinnelse, idet dennes høyre halvdel er vist i snitt for å vise pakningens åpne stilling. Figur 2 er et riss lik figur 1, men som viser pakningen i stengt stilling. Figur 3 er et utsnitt som viser festeorganene for topp-plateringen i låst stilling. The above as well as other purposes and advantages shall be described in more detail in the following with reference to the drawings where: figure 1 is an elevation of the improved ring safety valve according to the present invention, the right half of which is shown in section to show the open position of the seal. Figure 2 is a diagram similar to Figure 1, but which shows the seal in the closed position. Figure 3 is a section showing the fastening means for the top plating in the locked position.

En ring-sikringsventil 10 innbefatter et ventilhus 12 som har en nedre flens 14 med et oppadstående, indre kantparti 16 A ring safety valve 10 includes a valve housing 12 having a lower flange 14 with an upstanding inner edge portion 16

og et oppadstående ytre kantparti 18 i avstand utad fra kantpartiet 16 og forløpende over kantpartiets 16 øvre ende. Festeorganer 20 fester en øvre platering 22 i det ytre kantpartiets 18 øvre ende som beskrevet i det følgende. En sentral boring 24 strekker seg gjennom ventilhuset 12 og plateringen 22. and an upward-standing outer edge portion 18 at a distance outwards from the edge portion 16 and extending over the edge portion 16's upper end. Fastening means 20 fasten an upper plating 22 at the upper end of the outer edge portion 18 as described below. A central bore 24 extends through the valve body 12 and the plating 22.

En indre ring 26 er festet til det indre kantparti 16 som vist og en ytre ring 28 holdes i stilling mellom en skulder 30 An inner ring 26 is attached to the inner edge portion 16 as shown and an outer ring 28 is held in position between a shoulder 30

på det ytre kantparti 18 og en låsering 32 som er plassert i et spor 34 på det ytre kantpartiets 18 innside. Innerringen 26 og ytterringen 28 er anordnet med innbyrdes avstand for å oppta et rør 38 som forbinder et stempel 40 i et kammer 42 under ringene 26 og 28 med en aktuatorplate 44 over ringene 26 og 28. on the outer edge part 18 and a locking ring 32 which is placed in a groove 34 on the inside of the outer edge part 18. The inner ring 26 and the outer ring 28 are spaced apart to receive a tube 38 which connects a piston 40 in a chamber 42 below the rings 26 and 28 with an actuator plate 44 above the rings 26 and 28.

En pakning 46 er plassert i en pakningsutsparing 48 mellom overflaten 50 på den øvre platering 22 og den øvre overflate 52 på den indre ring 26. Pakningen 46 omfatter en fjærende ring 54 med passende, innstøpte støtteinnlegg 56, og den er omgitt av en ytre fjærende ring 58 som er i inngrep med aktuatorplaten 44 som vist. A gasket 46 is located in a gasket recess 48 between the surface 50 of the upper plating 22 and the upper surface 52 of the inner ring 26. The gasket 46 comprises a resilient ring 54 with suitable, cast-in support inserts 56, and it is surrounded by an outer resilient ring 58 which engages the actuator plate 44 as shown.

Når stempelet 40 således beveges oppad som reaksjon på When the piston 40 is thus moved upwards in response to

trykk i nedre ende av kammeret 42, utsettes en ytre fjæring 54 for en kilevirkning som virker til å bevege pakningen 46 til dens stengestilling vist i figur 2. Når trykket avlastes fra kamme-rets 42 nedre del og tilsettes dets øvre del vil stempelet 40 bevege seg nedad og derved tillate pakningen 46 og den ytre fjæring 58 å gå tilbake til stillingen vist i figur 1 . pressure at the lower end of the chamber 42, an outer spring 54 is subjected to a wedge action which acts to move the gasket 46 to its closed position shown in figure 2. When the pressure is relieved from the lower part of the chamber 42 and added to its upper part, the piston 40 will move downwards thereby allowing the gasket 46 and the outer spring 58 to return to the position shown in Figure 1.

Innvendig i det ytre kantpartiets 18 øvre ende er utformet spor 60 som samvirker med utspring 62 på en splittring 64 for befestigelse av den øvre platering 22 til ventilhuset 12. Splittringen 64 er normalt i sin ulåste eller tilbaketrukne stilling som vist i figur 3, og har indre kamflater 66 som er i inngrep med overflate 66 på utsiden av et hylsestempel 70, Inside the upper end of the outer edge portion 18, a groove 60 is formed which cooperates with a protrusion 62 on a split ring 64 for attaching the upper plating 22 to the valve housing 12. The split ring 64 is normally in its unlocked or retracted position as shown in Figure 3, and has inner cam surfaces 66 which engage surface 66 on the outside of a sleeve piston 70,

slik at når stempelet 70 beveges nedad styres splittringen 64 utad til sin låsestilling vist i figur 4. Når stempelet 70 beveges oppad går splittringen 64 tilbake til sin ulåste stilling. Splittringens 64 låste stilling, med dens ende i inngrep med en oppadvendt skulder 72, låser eller sikrer en øvre platering 22 til det ytre kantparti 18, og danner således før nevnte feste- so that when the piston 70 is moved downwards, the split ring 64 is controlled outwards to its locked position shown in Figure 4. When the piston 70 is moved upwards, the split ring 64 returns to its unlocked position. The locked position of the split ring 64, with its end in engagement with an upwardly facing shoulder 72, locks or secures an upper plating 22 to the outer edge portion 18, and thus forms the previously mentioned fastening

organer 20. bodies 20.

Hylsestempelet 70 er bevegelig anordnet i splittringen 64 og omslutter overflaten 78 på den øvre platering 22 og en tet-ningsring 80 som er festet til den øvre platering 22 ved hjelp av passende festeorganer, for eksempel hodeskruer 82. Et kammer 84 mellom hylsestempelets 70 innside og en overflate 86 på den øvre platering 22 tilføres passende trykkfluid, for eksempel luft, over og under en stempeltetning 88 ved hjelp av porter 90 og 92. Passende, forsenkede nipler 94 er anordnet ved portenes 90 og 92 ytteråpninger. Luft eller hydraulikkfluid som tilføres porten 90 virker spledes til å bevege stemepelt 70 nedad for låsing av festeorganene 20 og luft som leveres til porten 92 virker til å bevege hylsestempelet 70 oppad for frigjøring av festeorganene 20. Skruer 96 er innskrudd gjennom kantpartiet 18 og er innrettet for inngrep med spor 98 på utsiden av hylsestempelet 70 for å hindre utilsiktet utløsning av festeorganene 20 fra låst stilling. The sleeve piston 70 is movably arranged in the split ring 64 and encloses the surface 78 of the upper plating 22 and a sealing ring 80 which is attached to the upper plating 22 by means of suitable fasteners, for example head screws 82. A chamber 84 between the inside of the sleeve piston 70 and a surface 86 of the upper plating 22 is supplied with suitable pressure fluid, for example air, above and below a piston seal 88 by means of ports 90 and 92. Suitable, recessed nipples 94 are provided at the outer openings of the ports 90 and 92. Air or hydraulic fluid supplied to the port 90 acts as a spring to move the plunger 70 downwards to lock the fasteners 20 and air supplied to the port 92 acts to move the sleeve piston 70 upward to release the fasteners 20. Screws 96 are screwed through the edge portion 18 and are aligned for engagement with groove 98 on the outside of the sleeve piston 70 to prevent accidental release of the fastening means 20 from the locked position.

Gjengehull 100 i hylsestempelets 70 øvre overflate er anordnet slik at passende innretninger som for eksempel løfteører 102 muliggjør manuell eller mekanisk løfting av hylsestempelet 70 for manuell utløsning av festeorganene 20. Også ved å utøve en mekanisk kraft mot stempelets 70 øvre overflate kan stempelet beveges nedad for låsing av festeorganene 20. Festeorganene kan således fjernstyres ved bruk av en trykkfluid eller manuelt ved å utøve en mekanisk kraft direkte på stempelet 70 for å bevege det i ønsket retning. Threaded hole 100 in the upper surface of the sleeve piston 70 is arranged so that suitable devices such as lifting lugs 102 enable manual or mechanical lifting of the sleeve piston 70 for manual release of the fastening means 20. Also by exerting a mechanical force against the upper surface of the piston 70, the piston can be moved downwards locking of the fastening means 20. The fastening means can thus be controlled remotely using a pressure fluid or manually by exerting a mechanical force directly on the piston 70 to move it in the desired direction.

Gjengehull 104 i den øvre plateringens 22 øvre overflate er anordnet for å oppta løfteører (ikke vist) for å lette fjerning og utskifting av den øvre platering 22. Threaded holes 104 in the upper surface of the upper plating 22 are arranged to receive lifting lugs (not shown) to facilitate removal and replacement of the upper plating 22.

Claims

1. Ring safety valve against blowout, characterized in that it includes a valve housing with a central through bore, an upper plating, means for attaching the upper plating to the valve body with an annular gasket recess surrounding and facing the central bore under the upper plating, a resilient ring seal in the seal recess, and means for moving the resilient O-ring between open and closed positions, which fasteners can be moved between locked and unlocked positions manually and by the influence of pressure fluid.

2. Ring-shaped packing according to claim 1, characterized in that the fastening means comprise means for engagement with the valve body to secure the upper plating in a locked position.

3. Ring safety valve according to claim 1, characterized in that the fastening means comprise a split that can form an engagement with the valve body, and a pressurizable sleeve piston which cooperates with the split to move it to the locked position and allow it to move to the unlocked position.

4. Ring safety valve according to claim 3, characterized in that it comprises means for retaining the piston in its position where it holds the split in a locked position.

5. Ring safety valve according to claim 3, characterized in that it comprises means on the sleeve piston for manual movement thereof.

6. Ring safety valve according to claim 3, characterized by the valve housing comprises an upstanding edge portion with grooves around its upper inner surface, and that the split ring includes external protrusions for engagement with the tracks.

7. Ring safety valve according to claim 6, characterized by the split comprises a cam surface on its inside, and that the sleeve piston comprises a surface which interacts with the cam surface of the solid ring to force the split outwards so that its projection engages with the grooves to secure the upper plating to the edge portion of the housing.

8. Ring safety valve according to claim 7, characterized by the split engages with an upwardly facing shoulder on the upper plating when it engages with the grooves in the edge portion of the housing to secure the upper plating to the housing.

9. Ring safety valve characterized in that it comprises a valve body having an inner, upstanding edge portion with a central through bore and an outer upstanding edge portion with internal grooves in the upper portion of its inner surface, an upper plating which is located in the outer edge portion and cooperates with the valve body to form an inwardly facing gasket recess, a gasket placed in the gasket recess, means for activating the gasket so that it closes inwardly in a sealed position, the upper plating having an outer, upward-facing shoulder, a split ring is located on the shoulder and in the outer edge portion and has protrusions and has protrusions on its outer circumference and a ridge on its inner surface, a pressure-actuated locking ring located between the outside of the upper plating and the inside of the split ring and having an external cam surface that cooperates with the internal cam surface of the split ring, and means for applying pressure to the pressure-actuated locking ring to move it from the unlocked position to the locked position, in which position it guides and maintains the split outwardly in engagement with its projection in the internal grooves in the outer edge portion and from the locked position to the unlocked position, in that the locking ring has means for mechanical engagement for manual movement between locked and unlocked positions.