CA2334717A1 - Cleaning and lubricating device for threads, especially for drill pipes - Google Patents
Cleaning and lubricating device for threads, especially for drill pipes Download PDFInfo
- Publication number
- CA2334717A1 CA2334717A1 CA002334717A CA2334717A CA2334717A1 CA 2334717 A1 CA2334717 A1 CA 2334717A1 CA 002334717 A CA002334717 A CA 002334717A CA 2334717 A CA2334717 A CA 2334717A CA 2334717 A1 CA2334717 A1 CA 2334717A1
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- CA
- Canada
- Prior art keywords
- cleaning
- pipe
- lubricating device
- nozzle
- set forth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/006—Accessories for drilling pipes, e.g. cleaners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/021—Cleaning pipe ends or pipe fittings, e.g. before soldering
Abstract
An account has been made for a thread cleaning and lubricating device in the form of a high pressure washing device (16, 18, 20, 22, 24, 12) for cleaning external/internal threads of pipe end couplings, and equipped with a mechani sm (16', 18', 20, 22', 24, 12) for applying fat under pressure on said threads. A nozzle head's main body (10) is formed with two separate annuli (14, 14') fo r the supply of cleaning liquid under high pressure or thread-fat under pressure, respectively. In order to arrange the conditions for a uniform cleaning process across the entire thread portion and an even application of thread-fat, and for simplifying and facilitating the centring of respective pipe end's socket/tap end in relation to the axis (50) of the nozzle head/bo dy (10), each annulus (14, 14') has a 360~ encircling discharge slot opening (2 6, 26').
Description
LL I/t~J C~VVV 11-'~rV I I n I IW11 tJV 1 1L L'JCJ1'110J7J11VJ IIJ.CJJi 'tt WO 99160245 1 PCTll~1099100139 CLEANING AND hU$RICATING DEVIC$ FOR THRE.~.DS, ESPECIALLY FOR
DRILL PIPES
The presenC invention relates to a cleaning and lubricating device for threads, especially for cleaning a threaded pox-s Lion of zap and socket ends on drill pipc:l and casings, and wherein water or other cleaning liquid c_an be used as clean-ing agent, anal wherein thread tat is used as lubricating agent. w The state of the art is represented by :i.a. Norwegian 8atent so specif icati.on Na. 179.920 as well as U.;S. patent specifica-tions Nos . 5 , 653, 819 axed 5,15'7, 802 .
Norwegian patent specification No. 179,920 shows a device having driven rotary nozzles. The rctatS.ve property. the mflunzing and support as well as the need for motive force of ss these known no2zles oomplicate this knc~r~m. device and make it more expensive. This device is cxclusi~~ely built up for the purpose of applying thread fat.
i.
__ _ _ -_ --_- ~ . .- . .... . . .....v ~ 02334717 2000-12-11 ~ 11.:
VVLYIIJJJJ110J v7. r10141 WO 99164245 2 PCT/N099~00~39 U.S. patent specification No. 5,653,919 deals with a device for cleaning threads of drill pipes. The device comprises circumferentially distributed nozzles spraying fluids to=Nerd the threads, Here, a plural~.ty of nozzles are used, placed __ along an annular path, and this annular row of nozzles is ca-pable o~ cleaning both exte=r~.al thxeads (on the tap end) and internal threads (within the socket end)_ The total spx'ay~,ng capacity of the nozzles is relatively difficult to change and adjust. This patent specification is exclusively occupied with cleaning of threads, and the knoom device is not adapted for the application of thread fat.
U.S. patent specification Na. 5,15,802 dLeals with a s~.milar device wherein centring of the cleaning reads has been ef-fected in relation to the threaded pozt~.oz~. to be cleaned.
Z5 This known device does not comprise any 7_ubricacing means.
According to the present iaventzon, one has i.a. aimed at avoiding rotary mounting of the rioxzle head and forced rota-tion thereof, and one has also intended i~a_-obtain simpl3~fied adjustment of the ~3,u~.d flow amount per ttime unit, simultane-zo ously as this flow should be brought to cessation for one fluid (e.g. thread fat) when the other fluid (a.g. water, wa-ter steam or another fluid in liquid or steam form) i.s beixzg sprayed out under a high pxessure during a first high pres-sure gashing operation. Fos the cleaning and J.ubrication of ~s external threads on the drib, pipe s tap end, the nozzle ap-ertures should point radiahy inwardly a,nd, for a correspond-ir~g treatment of internal thxeads within: a socket end, the nozzle apertures should point radially outwardly. This read-justment ~.s to be carried out by means of simple modifying 3a encroachments on the constructive building up of one embodi-ment, without deviating fxom the fundamental principles of ....-- n ate. VUi'~11V.JJJilVJ IIJ. ~U(~~.L
WO 99160345 3 PC'f/1V099100I39 the invention_ Equipped with radially inweardly directed noz-zle apertures or with radia3.ly outwardly directed nozzle ap-ertures, the cleaning and luori.caLing dev:~ce in accordance with the in~rention a a con:,zructi~crely anti functionally rim-s pler accessory, facilitating and simplifyaz~.g zhe ~,ndividual working operaCions as we?1 as securing that they become cazw Tied out with optimum efficiency, simulzz;aeously as favour-able conditions have been of=eyed in order to exclude stop-page dux~.ng use .
~0 5aid objects are realized by means of a cleaning and lubri-cating device distinguishing itself through the features as defined in zhe characterizing part of claim 3..
The cleaning and lubricating device accozding to the inven-tion has twv, preferably parallel, annular, preferably circu-ss lar nozzle apertures. A first nozzle apewture for feeding ou' cleaning fluid under high pressure and a secend nozzle aper-tures fc~r feeding out thread fat, both noz~:.lc apertures ex-tending themselves 36_0 around the axis of the nozzle head and, in their entire extent', either are directed radially in-ao wardly zn order to treat external t3~readF~ or radially out-wardly in order to treat internal threads, said twv nozzle apertures individually being adapted to be opened, closed and ~adjusced in degree of opening. y The cleaning yr lubrication, respeativel~r, of the threads takes place in that a relative, rectilinear, centrally con-trolled displacement movement ie establi~3hed between the de-vice's noaale head with the two annular nozzle apertures ao,d the threaded drill pipe end portion to be cleaned and lubri-cated, in the course of which the apertures of the nozzle so head effects an optimum unitary treatment, 360 in the.cir-n;
_ . _ . .... ......__ ~ 02334717 2000-12-11 ~ ~' vV~~~~~vwy~vv ~~~~... ~y WO 99~bOZ45 4 FCT11V099I00139 cumferential direction, first with the nozzle aperture for the cleanin3 agent under high pressure in ar: open condition, while the other nozzle aperture a c'!osed and, thereupon, with the nozzle aperture for the thread fat under pressure in s an open condition, while thn water-spraying nozzle aperture is closed.
Thus, the two thread treating operations. cleaning and appli-catior_ of rat, are carried out by means o~f one and the same, simple tool or accessory, immediately foliowi.ng each othex;
zo this boring advantageous because trse thread fat, thus, ~s ap-p?led o:~ recently cleaned threads.
The dwice o~ the inventior_ exhibits simple adjusting possi-bilities in order to adjust the degree of: feeding out oz the cleaning liquid or of the thxead =at, res;pecLively.
zs According to knowr~ technique, the threada on the pipe ends are cleaned and lubricated before the pipe is xun down into __th~e bore hole, i.a. that extra time lapse: when drill pipes are to be run doom into the~bore hole. Additionally, this cleaning and lubricating work often is carried out by means of high pressure washing apparatus, whereaupon thread fat is applied manually. When such drill pipes rare withdrawz~~ from the bore~hole again through so=called "tripping"~(trippiiig in/tripping out of drill string), the ch:~eads are no longer treatedf the drill pipes then being trazmferrcd directly to as storage in finger board iii the derrick, vaYiere they are ex-posed to wind and weather.
By using a cleaning and lubricating apparatus according to the invention, the dri3.l pipes are ready to be treated upon leaving the bore hole and to be displaced by means of a pipe ii CA 02334717 2000-12-11 '~~-WO 99/60'r45 5 PCT/N099/00139 handling apparatus_ Then, time is available to position the drill pipe with respect to the device of the invention, cleaning the threads Lhereof and lubricating them with thread fat, before the pipe handling apparatus displaces the p3.pe s further to said finger board_ As it takes moxe zirne to pull a pipe up j°rom the bore hole than it tske~ to swing it away by means of the pipe k7~andling appaYatus, this cleaning and lubricating operation carried out by the present device does not delay the seauence pullimg the drill string out from the bore hole.
Additional advantages and features of the device according to the invention are further explained in the following, refer-ence being made to accompanying drawings, illustrating exam-ples of preferred embodiments, and wln.ere~zn:
is Figure 1 is an axia7_ section through a nozzle head of the in-ventian, eqv.iQped with supply and discha~rgg device for two fluids, cleaning liquid and thread fat, and where both dis-charge openings are closed:;
Figure 2 is an axial section corxespond:i.ng to figure 1.
za whereiri one annular. radially inwardly .directed discharge opening is open, while the~ocher discha:rge~opening which is identical in shepe, design and orienCation, ie closed;
Figure 3 shows the noa2le head in perspective view, disposed on a vextical .support column and connected with supply hoses zs for fluid, and wherein an externally threaded pipe cap end is inserted into a eircumferential ring formed by the main body of the nozzle head;
ii __ _._ .__. _ . ._ ..... ._..,..... ~ 02334717 2000-12-11 ~.~
.........~..~......~--,..... ......... ,_ Figure 4 shows the nozzle head, etc., in figure 3 in perspec-tive as seen.from the opposite side; two fuz~ther pipes havir~g externally _threaded tap ends are awaiting treatment of their threads ; .: . _.
s Figure 5 shows in side ele~rational view/trertical section a nozzle head in accordance with the izzvent:ion in connecti.orl with a cent=ins means adapted zo centxe :.3 pzpe tsp end having external threads in =elation to the annular nozzle body, az7.c~
wherein ar. upwardly sonically tapering cE_ntring held is sup-parted by the upper end of a telescopic pipe device;
Figure 6 shows the conical centring head in centring engage-ment in the bore of the pipe tap end;
Figure 7 sh4ws a further telescopic pipe carrying the nozzle head and an upwardly open housing surrounding the latter, in is a continued condition, the noaale being placed concentrically around the suspended, externally threaded pipe tap end;
Figure 8 shawl a nozzle head wherein fiv.id discharge opena.r~.gs are dixected xad~.ally outwardly, for wa~~hing and. thereupon, lubrication of internal threads in an upwardly directed pipe zo socket end;
Figures 9 - I2 show perspective views of: a pipe handle appa-ratus to be used in the thread Cleaning and lubricaC~.on, and illustrate four operational steps folloa~ring one aftex the other, wherein zs Figure 9 shows the pipe handling appararug i~tunediately after it has caught a pipe section screwed loose from a pips __ ___ -___ _ . .- . .... ......r..r ~ 02334717 2000-12-11 ~ ~' y~y~aVVrv~yVV
.~. ~y -~~
WO 99160345 ~ PCT/P1099I00139 string, the pipe section being ready to be sraung around the vertical axis of the handling apparatus;
Figure 10 shows said pipe section swung into position.and __ lowered dawn within s cleaning and lubrication devioe for the s tap end. of the pipe section, a corresponding device for cleaning arid lubricating the socket end of the pipe section being situated coaxi.ally with the first-mentioned, urxderlying device, placed at the top of the pipe handling apparatus at a vertical distance from the undarlyixsg device which insignifi-io cantly exceeds the length of the pipe section.;
Figure 11 shows the pipe section raised ~w5.th its upper socket end in eleaning/lubricating engagement with the upper device;
and Figure l2 shows a situatiozx where t'!1e pipe section' s end cou-~s pling threads are cleaned and lubricated., and where the pipe hand?.ir~g apparatus is swuzxg 5.nto position away from the de vices uppermost and lowermost, in order to suspend the pipe section in a firxger board, from which two pipe sections al ready have been suspended, and which only has been shown in zo perspective part~.al view.
First, ~ reference is made to f figures 1 ezzd 2 which, in an ax-ial section, show how a cleaning and luhricatirsg device has been built up constructively according ito the inven'tivn.
The substantially annular body 10 of the nozzle head is in-ns ternally formed with two parallel 360° circumferential grooves 14 and 14', 3ymmetrieally placed in respect of a cen-tral, radially inward3y directed, annular portion 12, said grooves 1~ and 14', moreover, each being defined by an axi-..~. n w n n ~ ° W"r ~ 02334717 2000-12-11 ~ W VVl~lVv/JVJiiW J vJV itW
~i WO 99I60~45 8 PCTliV099lU0139 ally displaceable nozale ring 16 and 1fS', so that each of the iz~Lernal circumferential grooves 1~ and 1~' exhibits a trape-zoidal cross--section, the longest of t7ae parallel sides being positioned at the central, , radial~.y inwardly directed ann:xlax __ :, portion 3.2 , To each of these internal circumferent.i,al grooves 1~., 14' passes a gaze 18 and a gate 18', respectively, for the supply of cleaning liquid under pressure and th~.read fat under pressure, respectively.
In the axially directed, annular graovws in the nozzle rings so 16, I6' , $rnall screw spr5.z7~gs 2o are disposed, said springs with the outer end thereof resting against the end face of a nut 22, 22' assigned to each of the nozzle rings 16, 16".
Each nut 22, 22' is formed with a notch 24 or similar catch-ing means for a tool (nod shown) for s~creuring the nut in ~s question 22 or 22', respectively. in car out, so that one through turning the nut 2a or 22', res>peccively, can adjust the width of the discharge opening slot 26 , 26' upon the ap-plication of cleaning liquid or thread fat, re$pectively_ Diametrally to the fluid supply gates l8 and 18', the nozzle ao head body's wall is formed with radia:lly directed, internal bores 28, 28' for set screws (not shown.) which are tightened in order to lock a set nut 22 or 22', resgectivc~ly. Of course, the respeeeive sec sczew must be somewhat unscrewed before the nut 22, 22' belonging thereto is set for adjusting as the discharge slot opening.
Accardiz~,q to'figure 3, the nozzle head's annular body 10 is mounted on top of a vertical support column 3Q. The re~erence z~umera~,s 32 and 32' denote fiui.d supply pipelines/hoses cou-pled to the gates 18 and 18' , respect~.vely.
-- ~w wvV ~y ~" ' '" ' ''""J" CA 02334717 2000-12-11 ~ iL' VVt'~fiVJJJIiVJ J.
iJ~ "ti WO 99160245 g PCT/1~1099IOD139 1~. pipe, e_g_ a drill pipe, 3a having an end connector 36 formed with an externally threaded pipe tap end 38, is posi-tioned in a centred evndition within the no4ale head which, as shown specifically in figure 2, is formed with radially _.
s inwardly direeCed discharge opening s7.vts for pressurized flaid for cleaning and lubrication of ext~rr~al pipe threads.
Fiz'st, the nozzle head ~,0 is passed along the threaded por-tion 3B during the application o:. cleaning liguid through the discharge opening 26, whereLpon the nozzl°_ head l0 is re-turned across the threaded portion 3B during application of thread fat through the discharge opening 26'. When cleaning liquid/thread fat is not supplied to the, circumferential grooves 14 and 1e' , respectively, the syx~~.z7,gs 2 o w~.11 ux'ge the nuzzle ring 16 and 16', respectively, agaix~.st.::he annular portion 12 and, thus, close the dischaxc~e opening zz~ ques-Lion.
Figure 4 shows the devise o~ figure 3 and illustrates addi-tionally two further drill pipes 34' and 34" to be treated.
Thus, s relative displacement possibila,t~y between the nozzle as head l0 and respective drill pipes 3~, :3~', 3a" must be pro-vided.
In figure 5, thg maa.n body 10 of tkie no~z2le head ~,s supported 'at the top 'of a bracket 40 disposed onwthe bottom of an up-wardly open, case-shaped housing 42 cez~trically supported by zs a vertical telescopic pipe 44, surrounding a vertically dis-placeable piston rod 46 incorporated in a centring meek~.anism beCween the nozzle head and the cxtcrnslly threaded pipe tap end 38 and. which, to this end, carries an upwardly sonically tapering-bentring head 48. The drill pipe 34 is then sus-ao pended with its downwardly sonically capering pipe tap end 38 above tho nuzzle head 10 in the initial. position thereof, _ ._ __ ___ _ _ . ._ . .... ......__ ~ 02334717 2000-12-11 ~ _. ~-_ ._~_______ __ _ . ._ WO 99160245 1'p PC'~'11~T099I00139 figure 5, The drill pipe 34 is positioned by means of a pipe handling apparatus, xlat shown.
According to figure s, the centring head 48 is brought into __ centring engag_ment in the pipe tap end upon upwardly di-s rested displacement of the piston rod g6. The common axis of the centzed externally thread pipe tap aizd the nozzle head 10 is designated at S0.
zn order to cause the annular nuzzle head, 10 to surround and move along the pipe tap end 38 in order to treat the threads thereof through high-pressure-rinsing them and, thereupon, provide them with thread fat through the radially inwardly directed opening slots 26 and 26', respe:ctiv~ely, the tele-scopic pips 4a is now raised as shown irv figuxe 7.
33 inda.cates _an cutlet tube for cleaning liqui,d_ z~ In figure s, a nozzle head embodiment is shown, where the diseharge.slot openings are directed rae3ially outwardly in ordex to ez~able high-pressure-rinsing aaad subsequent lubrica-tion of pipe threads with thread ~at under pressure at inter-zxal thzeads within pipe sockets 52. A centring head 54 having a forward, downwardly comically tapering guiding poxtion 54' having a common longitudinal axis 56 with the nozzle head l0 has been inserted into the pipe bore of a drill pipe 34, the end socket 52 thereof po~.x~.zir~.g upwardly, in order to centre it in relation to the nozzle head 10. ~'he centri.r~.g head 25 s~, 5g ~ is carried on the end c~ a verzi.cally suspended piston rod 58 extendable and withdrawahle in a cylinder 60 caxrying a pipe 62, coaxially therearith and foxme~d sa~.th two channe7,s 64 and 64' each connected to a gate &6,anci 6&' for the supply of cleaning liquid and thread fat, respec~~ively, and each lead-ii°
. " . .,.. ............. ~ 02334717 2000-12-11 ~ ~' w~ "~vv~V~~vv '. -- ._ WO 99160345 ~'~' ~CT11~1099Ib0139 ing to an annulus 68 and 68', respectively, (corresponding to 14 and 14' in figures 1 and 2~ each assic~rred to a 360° encir-cl~.ng, closeable, openable discharge s3.vt: vpeni.ng 70, 70' adjustable is re3pect of slot width. ,.. _-s Noa2le r~.ngs 16, 16', springs Zo, nuLS 2:Z. 22' and central, radially inwardly directea, annular mall portzon l2 are sub-stantially as in previous embodimenLS, and equal and similar parts and members are each derlaced at the same reference nu-meral and indications as before.
zo As mentioned, figures 9 - 12 scow a pipe handling apparatus with which the cleaning and lubricating device aecoz~ding to the invention appropriately may be used.
The pipe hazidling apparatus generally demoted at reference numeral 72 , . comprises a wvertical cfllum0,-~7.~.ke suppoxtr body m having a lower foot plate 7s resting on the bore deck ~8, where the mousehole is indicated at ao. Up from the mousehole --- 80 projects an upper, socket-shaped end portion 34 of a pipe string (not visible) suspended from above ax~.d from wb,~.ch an overlying pipe section 34' has been unscrewed, hanging on xo pivotable arms 82, 82' through catchers 84, 84', zhe inner ends of the arms 82. 82' being disposed on slide pieces B6, 86~ ors the column-Like suppert body~~4~of the apparatus ~z.
Such pipe haradZ~.ng apparatus 72 are known per se in general desiga9 based on turnability about a veirtiaal axis (the axis zs of the column 7~) as well as raisabilit:yllowerability.
zn the derrick (sot sho~rrn), laterally of zhe pipe handling apparatus, a so-called finger board 88 has been disposed, the -_ ..~.., "..~...r ~ . ~ . . ~... ......,_.,... ~ 02334717 2000-12-11 ~ ~'-~
'J"~~~""'J"y~""' "~
WO 99/607.x5 12 pCTlIH099100139 board being indicated in partial view only, and from which two pipe sections 34", 34"' have been sus;pAndpd.
The cleaning and lubricating device having Lh° nozzle head --for the tap end of the pipe section;3a', is disposed on the s drill floor 78 laterally of the foot plane 7s of the column 74, while the corresponding device having the nozzle head 10 for the socket end of the pipe section ~3~,r is arxanged, sus-pended from the upper end of the column 74.
In figurc 10, the pipe section 34' is turned into position io about th.e vertical axis of the column 7~~ as well as lowered into the lower device equipped with the nozzle head 30 for cleaning and lubricating the threads on the tap end of the pipe section 34'. Them, the upper device with its nozzle head io occupies an accurate coaxial position. ~.n xespect of the ~.s lower cleaning~and lubricating device s~o that, as soon as the tap end threads of the pips section 34' have been cleaned and lubricated, only a rectilinear displacement mo~rement is re-quired for bringing the socket end into engagement with the upper nozzle head 10.
za This position is shown in figure 11, while figure 12 shows the p~.pe handling apparatus 72 in a po5;ition where it is in the process of suspending the pipe section 3.4' , which exhib-its cleaned and lubricated end ceuplinc~ threads, fxom the finger board 88.
as znstead of lowering/raising the pipe section by means of the pipe handling apparatus 72 in order to allow that the pige section comes into engagement with the cleaning and lubricat-ing device, the~lower device with its inozzle head l0 may be raised by means of telescopic tubes 44,, and the upper device ii ... ".. .. . . ... . . .. o ....... ~ .a._ .rc.a~i.r...r.~aa~.... ~.. a . -ra "' '" '~ ~ ~ ~ CA 02334717 2000-12-11 WD 99/6025 ~'~ PCTIN099/00i39 with its nozzle head~l0 may be 7.ocvered by means of the cylin-der 60.
DRILL PIPES
The presenC invention relates to a cleaning and lubricating device for threads, especially for cleaning a threaded pox-s Lion of zap and socket ends on drill pipc:l and casings, and wherein water or other cleaning liquid c_an be used as clean-ing agent, anal wherein thread tat is used as lubricating agent. w The state of the art is represented by :i.a. Norwegian 8atent so specif icati.on Na. 179.920 as well as U.;S. patent specifica-tions Nos . 5 , 653, 819 axed 5,15'7, 802 .
Norwegian patent specification No. 179,920 shows a device having driven rotary nozzles. The rctatS.ve property. the mflunzing and support as well as the need for motive force of ss these known no2zles oomplicate this knc~r~m. device and make it more expensive. This device is cxclusi~~ely built up for the purpose of applying thread fat.
i.
__ _ _ -_ --_- ~ . .- . .... . . .....v ~ 02334717 2000-12-11 ~ 11.:
VVLYIIJJJJ110J v7. r10141 WO 99164245 2 PCT/N099~00~39 U.S. patent specification No. 5,653,919 deals with a device for cleaning threads of drill pipes. The device comprises circumferentially distributed nozzles spraying fluids to=Nerd the threads, Here, a plural~.ty of nozzles are used, placed __ along an annular path, and this annular row of nozzles is ca-pable o~ cleaning both exte=r~.al thxeads (on the tap end) and internal threads (within the socket end)_ The total spx'ay~,ng capacity of the nozzles is relatively difficult to change and adjust. This patent specification is exclusively occupied with cleaning of threads, and the knoom device is not adapted for the application of thread fat.
U.S. patent specification Na. 5,15,802 dLeals with a s~.milar device wherein centring of the cleaning reads has been ef-fected in relation to the threaded pozt~.oz~. to be cleaned.
Z5 This known device does not comprise any 7_ubricacing means.
According to the present iaventzon, one has i.a. aimed at avoiding rotary mounting of the rioxzle head and forced rota-tion thereof, and one has also intended i~a_-obtain simpl3~fied adjustment of the ~3,u~.d flow amount per ttime unit, simultane-zo ously as this flow should be brought to cessation for one fluid (e.g. thread fat) when the other fluid (a.g. water, wa-ter steam or another fluid in liquid or steam form) i.s beixzg sprayed out under a high pxessure during a first high pres-sure gashing operation. Fos the cleaning and J.ubrication of ~s external threads on the drib, pipe s tap end, the nozzle ap-ertures should point radiahy inwardly a,nd, for a correspond-ir~g treatment of internal thxeads within: a socket end, the nozzle apertures should point radially outwardly. This read-justment ~.s to be carried out by means of simple modifying 3a encroachments on the constructive building up of one embodi-ment, without deviating fxom the fundamental principles of ....-- n ate. VUi'~11V.JJJilVJ IIJ. ~U(~~.L
WO 99160345 3 PC'f/1V099100I39 the invention_ Equipped with radially inweardly directed noz-zle apertures or with radia3.ly outwardly directed nozzle ap-ertures, the cleaning and luori.caLing dev:~ce in accordance with the in~rention a a con:,zructi~crely anti functionally rim-s pler accessory, facilitating and simplifyaz~.g zhe ~,ndividual working operaCions as we?1 as securing that they become cazw Tied out with optimum efficiency, simulzz;aeously as favour-able conditions have been of=eyed in order to exclude stop-page dux~.ng use .
~0 5aid objects are realized by means of a cleaning and lubri-cating device distinguishing itself through the features as defined in zhe characterizing part of claim 3..
The cleaning and lubricating device accozding to the inven-tion has twv, preferably parallel, annular, preferably circu-ss lar nozzle apertures. A first nozzle apewture for feeding ou' cleaning fluid under high pressure and a secend nozzle aper-tures fc~r feeding out thread fat, both noz~:.lc apertures ex-tending themselves 36_0 around the axis of the nozzle head and, in their entire extent', either are directed radially in-ao wardly zn order to treat external t3~readF~ or radially out-wardly in order to treat internal threads, said twv nozzle apertures individually being adapted to be opened, closed and ~adjusced in degree of opening. y The cleaning yr lubrication, respeativel~r, of the threads takes place in that a relative, rectilinear, centrally con-trolled displacement movement ie establi~3hed between the de-vice's noaale head with the two annular nozzle apertures ao,d the threaded drill pipe end portion to be cleaned and lubri-cated, in the course of which the apertures of the nozzle so head effects an optimum unitary treatment, 360 in the.cir-n;
_ . _ . .... ......__ ~ 02334717 2000-12-11 ~ ~' vV~~~~~vwy~vv ~~~~... ~y WO 99~bOZ45 4 FCT11V099I00139 cumferential direction, first with the nozzle aperture for the cleanin3 agent under high pressure in ar: open condition, while the other nozzle aperture a c'!osed and, thereupon, with the nozzle aperture for the thread fat under pressure in s an open condition, while thn water-spraying nozzle aperture is closed.
Thus, the two thread treating operations. cleaning and appli-catior_ of rat, are carried out by means o~f one and the same, simple tool or accessory, immediately foliowi.ng each othex;
zo this boring advantageous because trse thread fat, thus, ~s ap-p?led o:~ recently cleaned threads.
The dwice o~ the inventior_ exhibits simple adjusting possi-bilities in order to adjust the degree of: feeding out oz the cleaning liquid or of the thxead =at, res;pecLively.
zs According to knowr~ technique, the threada on the pipe ends are cleaned and lubricated before the pipe is xun down into __th~e bore hole, i.a. that extra time lapse: when drill pipes are to be run doom into the~bore hole. Additionally, this cleaning and lubricating work often is carried out by means of high pressure washing apparatus, whereaupon thread fat is applied manually. When such drill pipes rare withdrawz~~ from the bore~hole again through so=called "tripping"~(trippiiig in/tripping out of drill string), the ch:~eads are no longer treatedf the drill pipes then being trazmferrcd directly to as storage in finger board iii the derrick, vaYiere they are ex-posed to wind and weather.
By using a cleaning and lubricating apparatus according to the invention, the dri3.l pipes are ready to be treated upon leaving the bore hole and to be displaced by means of a pipe ii CA 02334717 2000-12-11 '~~-WO 99/60'r45 5 PCT/N099/00139 handling apparatus_ Then, time is available to position the drill pipe with respect to the device of the invention, cleaning the threads Lhereof and lubricating them with thread fat, before the pipe handling apparatus displaces the p3.pe s further to said finger board_ As it takes moxe zirne to pull a pipe up j°rom the bore hole than it tske~ to swing it away by means of the pipe k7~andling appaYatus, this cleaning and lubricating operation carried out by the present device does not delay the seauence pullimg the drill string out from the bore hole.
Additional advantages and features of the device according to the invention are further explained in the following, refer-ence being made to accompanying drawings, illustrating exam-ples of preferred embodiments, and wln.ere~zn:
is Figure 1 is an axia7_ section through a nozzle head of the in-ventian, eqv.iQped with supply and discha~rgg device for two fluids, cleaning liquid and thread fat, and where both dis-charge openings are closed:;
Figure 2 is an axial section corxespond:i.ng to figure 1.
za whereiri one annular. radially inwardly .directed discharge opening is open, while the~ocher discha:rge~opening which is identical in shepe, design and orienCation, ie closed;
Figure 3 shows the noa2le head in perspective view, disposed on a vextical .support column and connected with supply hoses zs for fluid, and wherein an externally threaded pipe cap end is inserted into a eircumferential ring formed by the main body of the nozzle head;
ii __ _._ .__. _ . ._ ..... ._..,..... ~ 02334717 2000-12-11 ~.~
.........~..~......~--,..... ......... ,_ Figure 4 shows the nozzle head, etc., in figure 3 in perspec-tive as seen.from the opposite side; two fuz~ther pipes havir~g externally _threaded tap ends are awaiting treatment of their threads ; .: . _.
s Figure 5 shows in side ele~rational view/trertical section a nozzle head in accordance with the izzvent:ion in connecti.orl with a cent=ins means adapted zo centxe :.3 pzpe tsp end having external threads in =elation to the annular nozzle body, az7.c~
wherein ar. upwardly sonically tapering cE_ntring held is sup-parted by the upper end of a telescopic pipe device;
Figure 6 shows the conical centring head in centring engage-ment in the bore of the pipe tap end;
Figure 7 sh4ws a further telescopic pipe carrying the nozzle head and an upwardly open housing surrounding the latter, in is a continued condition, the noaale being placed concentrically around the suspended, externally threaded pipe tap end;
Figure 8 shawl a nozzle head wherein fiv.id discharge opena.r~.gs are dixected xad~.ally outwardly, for wa~~hing and. thereupon, lubrication of internal threads in an upwardly directed pipe zo socket end;
Figures 9 - I2 show perspective views of: a pipe handle appa-ratus to be used in the thread Cleaning and lubricaC~.on, and illustrate four operational steps folloa~ring one aftex the other, wherein zs Figure 9 shows the pipe handling appararug i~tunediately after it has caught a pipe section screwed loose from a pips __ ___ -___ _ . .- . .... ......r..r ~ 02334717 2000-12-11 ~ ~' y~y~aVVrv~yVV
.~. ~y -~~
WO 99160345 ~ PCT/P1099I00139 string, the pipe section being ready to be sraung around the vertical axis of the handling apparatus;
Figure 10 shows said pipe section swung into position.and __ lowered dawn within s cleaning and lubrication devioe for the s tap end. of the pipe section, a corresponding device for cleaning arid lubricating the socket end of the pipe section being situated coaxi.ally with the first-mentioned, urxderlying device, placed at the top of the pipe handling apparatus at a vertical distance from the undarlyixsg device which insignifi-io cantly exceeds the length of the pipe section.;
Figure 11 shows the pipe section raised ~w5.th its upper socket end in eleaning/lubricating engagement with the upper device;
and Figure l2 shows a situatiozx where t'!1e pipe section' s end cou-~s pling threads are cleaned and lubricated., and where the pipe hand?.ir~g apparatus is swuzxg 5.nto position away from the de vices uppermost and lowermost, in order to suspend the pipe section in a firxger board, from which two pipe sections al ready have been suspended, and which only has been shown in zo perspective part~.al view.
First, ~ reference is made to f figures 1 ezzd 2 which, in an ax-ial section, show how a cleaning and luhricatirsg device has been built up constructively according ito the inven'tivn.
The substantially annular body 10 of the nozzle head is in-ns ternally formed with two parallel 360° circumferential grooves 14 and 14', 3ymmetrieally placed in respect of a cen-tral, radially inward3y directed, annular portion 12, said grooves 1~ and 14', moreover, each being defined by an axi-..~. n w n n ~ ° W"r ~ 02334717 2000-12-11 ~ W VVl~lVv/JVJiiW J vJV itW
~i WO 99I60~45 8 PCTliV099lU0139 ally displaceable nozale ring 16 and 1fS', so that each of the iz~Lernal circumferential grooves 1~ and 1~' exhibits a trape-zoidal cross--section, the longest of t7ae parallel sides being positioned at the central, , radial~.y inwardly directed ann:xlax __ :, portion 3.2 , To each of these internal circumferent.i,al grooves 1~., 14' passes a gaze 18 and a gate 18', respectively, for the supply of cleaning liquid under pressure and th~.read fat under pressure, respectively.
In the axially directed, annular graovws in the nozzle rings so 16, I6' , $rnall screw spr5.z7~gs 2o are disposed, said springs with the outer end thereof resting against the end face of a nut 22, 22' assigned to each of the nozzle rings 16, 16".
Each nut 22, 22' is formed with a notch 24 or similar catch-ing means for a tool (nod shown) for s~creuring the nut in ~s question 22 or 22', respectively. in car out, so that one through turning the nut 2a or 22', res>peccively, can adjust the width of the discharge opening slot 26 , 26' upon the ap-plication of cleaning liquid or thread fat, re$pectively_ Diametrally to the fluid supply gates l8 and 18', the nozzle ao head body's wall is formed with radia:lly directed, internal bores 28, 28' for set screws (not shown.) which are tightened in order to lock a set nut 22 or 22', resgectivc~ly. Of course, the respeeeive sec sczew must be somewhat unscrewed before the nut 22, 22' belonging thereto is set for adjusting as the discharge slot opening.
Accardiz~,q to'figure 3, the nozzle head's annular body 10 is mounted on top of a vertical support column 3Q. The re~erence z~umera~,s 32 and 32' denote fiui.d supply pipelines/hoses cou-pled to the gates 18 and 18' , respect~.vely.
-- ~w wvV ~y ~" ' '" ' ''""J" CA 02334717 2000-12-11 ~ iL' VVt'~fiVJJJIiVJ J.
iJ~ "ti WO 99160245 g PCT/1~1099IOD139 1~. pipe, e_g_ a drill pipe, 3a having an end connector 36 formed with an externally threaded pipe tap end 38, is posi-tioned in a centred evndition within the no4ale head which, as shown specifically in figure 2, is formed with radially _.
s inwardly direeCed discharge opening s7.vts for pressurized flaid for cleaning and lubrication of ext~rr~al pipe threads.
Fiz'st, the nozzle head ~,0 is passed along the threaded por-tion 3B during the application o:. cleaning liguid through the discharge opening 26, whereLpon the nozzl°_ head l0 is re-turned across the threaded portion 3B during application of thread fat through the discharge opening 26'. When cleaning liquid/thread fat is not supplied to the, circumferential grooves 14 and 1e' , respectively, the syx~~.z7,gs 2 o w~.11 ux'ge the nuzzle ring 16 and 16', respectively, agaix~.st.::he annular portion 12 and, thus, close the dischaxc~e opening zz~ ques-Lion.
Figure 4 shows the devise o~ figure 3 and illustrates addi-tionally two further drill pipes 34' and 34" to be treated.
Thus, s relative displacement possibila,t~y between the nozzle as head l0 and respective drill pipes 3~, :3~', 3a" must be pro-vided.
In figure 5, thg maa.n body 10 of tkie no~z2le head ~,s supported 'at the top 'of a bracket 40 disposed onwthe bottom of an up-wardly open, case-shaped housing 42 cez~trically supported by zs a vertical telescopic pipe 44, surrounding a vertically dis-placeable piston rod 46 incorporated in a centring meek~.anism beCween the nozzle head and the cxtcrnslly threaded pipe tap end 38 and. which, to this end, carries an upwardly sonically tapering-bentring head 48. The drill pipe 34 is then sus-ao pended with its downwardly sonically capering pipe tap end 38 above tho nuzzle head 10 in the initial. position thereof, _ ._ __ ___ _ _ . ._ . .... ......__ ~ 02334717 2000-12-11 ~ _. ~-_ ._~_______ __ _ . ._ WO 99160245 1'p PC'~'11~T099I00139 figure 5, The drill pipe 34 is positioned by means of a pipe handling apparatus, xlat shown.
According to figure s, the centring head 48 is brought into __ centring engag_ment in the pipe tap end upon upwardly di-s rested displacement of the piston rod g6. The common axis of the centzed externally thread pipe tap aizd the nozzle head 10 is designated at S0.
zn order to cause the annular nuzzle head, 10 to surround and move along the pipe tap end 38 in order to treat the threads thereof through high-pressure-rinsing them and, thereupon, provide them with thread fat through the radially inwardly directed opening slots 26 and 26', respe:ctiv~ely, the tele-scopic pips 4a is now raised as shown irv figuxe 7.
33 inda.cates _an cutlet tube for cleaning liqui,d_ z~ In figure s, a nozzle head embodiment is shown, where the diseharge.slot openings are directed rae3ially outwardly in ordex to ez~able high-pressure-rinsing aaad subsequent lubrica-tion of pipe threads with thread ~at under pressure at inter-zxal thzeads within pipe sockets 52. A centring head 54 having a forward, downwardly comically tapering guiding poxtion 54' having a common longitudinal axis 56 with the nozzle head l0 has been inserted into the pipe bore of a drill pipe 34, the end socket 52 thereof po~.x~.zir~.g upwardly, in order to centre it in relation to the nozzle head 10. ~'he centri.r~.g head 25 s~, 5g ~ is carried on the end c~ a verzi.cally suspended piston rod 58 extendable and withdrawahle in a cylinder 60 caxrying a pipe 62, coaxially therearith and foxme~d sa~.th two channe7,s 64 and 64' each connected to a gate &6,anci 6&' for the supply of cleaning liquid and thread fat, respec~~ively, and each lead-ii°
. " . .,.. ............. ~ 02334717 2000-12-11 ~ ~' w~ "~vv~V~~vv '. -- ._ WO 99160345 ~'~' ~CT11~1099Ib0139 ing to an annulus 68 and 68', respectively, (corresponding to 14 and 14' in figures 1 and 2~ each assic~rred to a 360° encir-cl~.ng, closeable, openable discharge s3.vt: vpeni.ng 70, 70' adjustable is re3pect of slot width. ,.. _-s Noa2le r~.ngs 16, 16', springs Zo, nuLS 2:Z. 22' and central, radially inwardly directea, annular mall portzon l2 are sub-stantially as in previous embodimenLS, and equal and similar parts and members are each derlaced at the same reference nu-meral and indications as before.
zo As mentioned, figures 9 - 12 scow a pipe handling apparatus with which the cleaning and lubricating device aecoz~ding to the invention appropriately may be used.
The pipe hazidling apparatus generally demoted at reference numeral 72 , . comprises a wvertical cfllum0,-~7.~.ke suppoxtr body m having a lower foot plate 7s resting on the bore deck ~8, where the mousehole is indicated at ao. Up from the mousehole --- 80 projects an upper, socket-shaped end portion 34 of a pipe string (not visible) suspended from above ax~.d from wb,~.ch an overlying pipe section 34' has been unscrewed, hanging on xo pivotable arms 82, 82' through catchers 84, 84', zhe inner ends of the arms 82. 82' being disposed on slide pieces B6, 86~ ors the column-Like suppert body~~4~of the apparatus ~z.
Such pipe haradZ~.ng apparatus 72 are known per se in general desiga9 based on turnability about a veirtiaal axis (the axis zs of the column 7~) as well as raisabilit:yllowerability.
zn the derrick (sot sho~rrn), laterally of zhe pipe handling apparatus, a so-called finger board 88 has been disposed, the -_ ..~.., "..~...r ~ . ~ . . ~... ......,_.,... ~ 02334717 2000-12-11 ~ ~'-~
'J"~~~""'J"y~""' "~
WO 99/607.x5 12 pCTlIH099100139 board being indicated in partial view only, and from which two pipe sections 34", 34"' have been sus;pAndpd.
The cleaning and lubricating device having Lh° nozzle head --for the tap end of the pipe section;3a', is disposed on the s drill floor 78 laterally of the foot plane 7s of the column 74, while the corresponding device having the nozzle head 10 for the socket end of the pipe section ~3~,r is arxanged, sus-pended from the upper end of the column 74.
In figurc 10, the pipe section 34' is turned into position io about th.e vertical axis of the column 7~~ as well as lowered into the lower device equipped with the nozzle head 30 for cleaning and lubricating the threads on the tap end of the pipe section 34'. Them, the upper device with its nozzle head io occupies an accurate coaxial position. ~.n xespect of the ~.s lower cleaning~and lubricating device s~o that, as soon as the tap end threads of the pips section 34' have been cleaned and lubricated, only a rectilinear displacement mo~rement is re-quired for bringing the socket end into engagement with the upper nozzle head 10.
za This position is shown in figure 11, while figure 12 shows the p~.pe handling apparatus 72 in a po5;ition where it is in the process of suspending the pipe section 3.4' , which exhib-its cleaned and lubricated end ceuplinc~ threads, fxom the finger board 88.
as znstead of lowering/raising the pipe section by means of the pipe handling apparatus 72 in order to allow that the pige section comes into engagement with the cleaning and lubricat-ing device, the~lower device with its inozzle head l0 may be raised by means of telescopic tubes 44,, and the upper device ii ... ".. .. . . ... . . .. o ....... ~ .a._ .rc.a~i.r...r.~aa~.... ~.. a . -ra "' '" '~ ~ ~ ~ CA 02334717 2000-12-11 WD 99/6025 ~'~ PCTIN099/00i39 with its nozzle head~l0 may be 7.ocvered by means of the cylin-der 60.
Claims (11)
1. A cleaning and lubricating device for threads, especially threads on pipes screwable together, such, as drill pipes (34; 34'; 34") and casings, characterized in that the cleaning and lubricating device comprises a nozzle head, the main body (10) thereof being formed with supply gates or channels (18, 18'), each leading into an internal annulus (14, 14') belonging thereto, for individual supply of treating fluid to the respective annulus (14, 14'), and that each annulus (14, 14') is assigned a 360° encircling, radially directed discharge slot opening (26, 26'; 70, 70').
2. A cleaning and lubricating device as set forth in claim 1, characterized in that said discharge slot openings (70, 70') are directed radially outwardly, in order to clean and lubricate internal threads in a socket-shaped pipe portion (82) surrounding the nozzle head (10).
3. A cleaning and lubricating device as set forth in claim 1, characterized in that said discharge slot openings (26, 26') are directed radially inwardly for cleaning and lubricating external threads on a pipe tap portion (38) formed on a pipe end and surrounded by the nozzle body (10), which is shaped substantially annularly and exhibits a large, through-going, axially directed aperture.
4. A cleaning and lubricating device as set forth in claim 1, 2 or 3, characterized in that each discharge slot opening (26, 26'; 70. 70') is defined between an internal, 360° encircling portion (12) of the main body of the nozzle head (10) and an axially displaceable nozzle ring (16, 16') movable between a closed position in, which the respective movable ring (16, 16') rests sealingly against a land face on said internal, 360.theta.
encircling portion (12) of the nozzles body (10), and adjustable open positions, where a circumferential portion of respective nozzle ring (16, 16') is positioned at a larger or smaller distance from said land face on the internal portion (12) of the nozzle body (10).
encircling portion (12) of the nozzles body (10), and adjustable open positions, where a circumferential portion of respective nozzle ring (16, 16') is positioned at a larger or smaller distance from said land face on the internal portion (12) of the nozzle body (10).
5. A cleaning and lubricating device as set forth in claim 4, characterized in that each nozzle ring (16, 16') is spring-loaded (20) in the axial direction and assigned an operating means, e.g. an adjusting nut (22, 22') screwable axially to and fro along threads formed internally in the nozzle body (10), for displacing the nozzle ring (16, 16') belonging thereto upon the screwing of the nut (22, 22') axially into or out from the nozzle body (10).
6. A cleaning and lubricating device as set forth in claim 5, characterized in that each nut is assigned a locking means, e.g. a set screw, disposed in a threaded bore (28, 28') formed in the nozzle body (10), in order to lock the nut (22, 22') in an adjusted position.
7. A cleaning and lubricating device as set forth in any one of the preceding claims 1 - 6, and assigned a centring device (44,46,48; 54;54',58,60) for centring a pipe's (34; 34'; 34") end coupling (socket 52/tap end 38) in relation to the axis (56; 50) of the cleaning and lubricating device, characterized in that the centring device carries a centring head (48; 54,54') having a conically tapering outer portion, shaped, designed and adapted to be inserted guidingly into the bore of the pipe end coupling (52; 38), thus centring the pipe end coupling in relation to the axis (56; 50) of the cleaning and lubricating device, so that a pipe socket (52) is caused to surround the nozzle head concentrically prior to treatment, while an externally threaded pipe tap end coupling (38) is brought to be concentrically surrounded by the nozzle head; in both cases upon a relative axially directed displacement movement between socket/pipe tap end on the one hand and the nozzle head (10) on the other hand.
8. A cleaning slid lubricating device as set forth in claim 7, characterized in that the centring head (48; 54,54') sits on the end of a lengthenable/shortenable displacing device such as a telescopic pipe assembly or the like, for lineary, axially directed displacement in the direction of the axis (50; 56) of the nozzle head/body (10).
9. A cleaning sad lubricating device as set forth in claim 8, characterized in that the centring head (48) sits on the end of an axially displaceable piston rod, an inner telescopic pipe (46) or similar, linearly displaceable member, concentrically surrounded by an axially displaceable telescopic pipe, cylinder for the piston rod or the like (44).
10. A cleaning and lubricating device as set forth in claim 9, characterized in that said axially displaceable telescopic pipe or cylinder (44) for said piston rod (46), at the upper end thereof is securely connected to an upwardly open, case-/bowl-shaped housing (42) in which the nozzle head/body (10) is stationarily placed.
11. A cleaning and lubricating device as set forth in any one of the preceding claims, characterized in that such a device (10) for cleaning and lubricating a pipe section's (34') socket end is suspended from the top of a pipe handling apparatus (72) provided with pivotable arms (82, 82') having catchers (84, 84') for such a pipe section (34'), and wherein, preferably coaxially below the socket thread cleaning and lubricating device (10) suspended from the top of the pipe handling apparatus, is placed on the rigfloor (78) a corresponding device (10) for the tap end of the pipe section (34').
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO19981992 | 1998-05-04 | ||
| NO981992A NO306791B1 (en) | 1998-05-04 | 1998-05-04 | Cleaning and lubricating device for threads, especially for drill pipes and feeding pipes |
| PCT/NO1999/000139 WO1999060245A1 (en) | 1998-05-04 | 1999-04-27 | Cleaning and lubricating device for threads, especially for drill pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2334717A1 true CA2334717A1 (en) | 1999-11-25 |
Family
ID=19901992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002334717A Abandoned CA2334717A1 (en) | 1998-05-04 | 1999-04-27 | Cleaning and lubricating device for threads, especially for drill pipes |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1076755A1 (en) |
| AU (1) | AU3737299A (en) |
| CA (1) | CA2334717A1 (en) |
| EA (1) | EA002429B1 (en) |
| NO (1) | NO306791B1 (en) |
| WO (1) | WO1999060245A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7059900A (en) * | 1999-08-25 | 2001-03-19 | Lincoln Industrial Corporation | Method of lubricating and lubricant spraying apparatus |
| US6286627B1 (en) | 1999-08-25 | 2001-09-11 | Lincoln Industrial Corporation | Fluid dispensing apparatus |
| GB0018277D0 (en) | 2000-07-25 | 2000-09-13 | Weatherfield Lamb Inc | Cleaning and doping of tubulars |
| NO321224B1 (en) * | 2004-03-29 | 2006-04-10 | Odfjell Well Services As | Washing machine for drill bits |
| NO325213B1 (en) | 2004-12-16 | 2008-02-25 | V Tech As | Rorskjotsmoreanordning |
| NO333870B1 (en) | 2010-03-30 | 2013-10-07 | Nat Oilwell Varco Norway As | Method and apparatus for treating a pipe string section located in an intermediate bearing |
| NO334765B1 (en) * | 2011-02-23 | 2014-05-19 | Albatross Services As | Washing and lubricating device for drilling and weight pipes |
| EP2672058A3 (en) * | 2012-04-20 | 2014-04-16 | BENTEC GMBH Drilling & Oilfield Systems | Method and device for sealing the ends of drilling rod elements |
| WO2017219138A1 (en) * | 2016-06-21 | 2017-12-28 | I3-Edge Ltd. | Method and system for stripping tubulars and the like comprising frustoconical air blade |
| NO344708B1 (en) * | 2018-03-27 | 2020-03-16 | Mhwirth As | Dope unit for pipe handling machine and method for supplying dope |
| CN108756732B (en) * | 2018-08-02 | 2023-11-14 | 西南石油大学 | Circumferential impactor based on screw and spring |
| US20210071485A1 (en) * | 2019-09-06 | 2021-03-11 | Nabors Lux 2 Sarl | Doping devices for applying dope to pipe threads |
| CN112191568B (en) * | 2020-10-12 | 2022-11-18 | 河北宇通特种胶管有限公司 | Large-scale screw rod cleaning equipment that reliability is high |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2246874A (en) * | 1939-06-27 | 1941-06-24 | Nat Tube Co | Greasing device for threaded articles |
| US2642034A (en) * | 1950-11-20 | 1953-06-16 | Standard Oil Dev Co | Tool joint lubricator |
| US2760585A (en) * | 1952-11-24 | 1956-08-28 | Frank E Bergeron | Apparatus for applying lubricant to threaded connections |
| DE3537633A1 (en) * | 1985-10-23 | 1987-04-30 | Wilfried Dreyfuss | Device for rubbing grease over a thread, in particular of tubular structural parts |
| US5157802A (en) * | 1991-10-21 | 1992-10-27 | Guidry Mark L | Pipe thread cleaning apparatus |
| US5372154A (en) * | 1992-09-03 | 1994-12-13 | Robert Bee | System for cleaning threaded portions of tubular members |
-
1998
- 1998-05-04 NO NO981992A patent/NO306791B1/en not_active IP Right Cessation
-
1999
- 1999-04-27 EP EP99919716A patent/EP1076755A1/en not_active Withdrawn
- 1999-04-27 EA EA200001147A patent/EA002429B1/en not_active IP Right Cessation
- 1999-04-27 AU AU37372/99A patent/AU3737299A/en not_active Abandoned
- 1999-04-27 WO PCT/NO1999/000139 patent/WO1999060245A1/en not_active Application Discontinuation
- 1999-04-27 CA CA002334717A patent/CA2334717A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EA002429B1 (en) | 2002-04-25 |
| NO306791B1 (en) | 1999-12-20 |
| NO981992L (en) | 1999-11-05 |
| EA200001147A1 (en) | 2001-06-25 |
| EP1076755A1 (en) | 2001-02-21 |
| AU3737299A (en) | 1999-12-06 |
| NO981992D0 (en) | 1998-05-04 |
| WO1999060245A1 (en) | 1999-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |