OA10398A - Device for making a slot in an underground formation - Google Patents

Device for making a slot in an underground formation Download PDF

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Publication number
OA10398A
OA10398A OA60958A OA60958A OA10398A OA 10398 A OA10398 A OA 10398A OA 60958 A OA60958 A OA 60958A OA 60958 A OA60958 A OA 60958A OA 10398 A OA10398 A OA 10398A
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OA
OAPI
Prior art keywords
arm
saw arm
saw
housing
slot
Prior art date
Application number
OA60958A
Inventor
Brent Reynolds Ross
Robert Nicholas Worrall
Original Assignee
Shell Int Research
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by Shell Int Research filed Critical Shell Int Research
Publication of OA10398A publication Critical patent/OA10398A/en

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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
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • 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
    • E21B11/00—Other drilling tools
    • E21B11/06—Other drilling tools with driven cutting chains or similarly driven tools

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Small-Scale Networks (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

A cutting device for making a slot adjacent to a well traversing an underground formation comprises a chain saw arm (15) which carries an endless chain (24) with cutting elements (25). In use the chain (24) is rotated around the arm (15) while the arm (15) is gradually hinged from a longitudinal towards a lateral position relative to the wellbore thereby inducing the cutting elements (25) to cut a slot through the formation (2) and well casing or liner (5), if present.

Description

I 010398 - 1 - TS -5CC3_...2C1
DEVICE FOR MAXING A SLOT IN AN
UNDERGROUND FORMATION
The présent invention relates to a device for makir.g a slctadjacent to a well traversing an underground formation.
In the art of completion of wells for the production of oïl ar.dgas it is often necessary to perforate the formation ar.d/or well 5 casing and surrounding cernent annulus in order to permit flo*· et fluid from the formation into the wellbore.
It is common practice to make such perforations by means ofshaped charge perforating guns which fire a jet of métal particlesat hiah speed through the casing and cernent sheath intc the 0 surrounding formation.
Numerous attempts hâve been made to croate devices which areable to eut slots adjacent to an underground wellbore which do r.otdistort and compact the surrounding formation to the extent asoccurs with perforating guns. 1 USA patent spécification No. 3 225 828 discloses a downhcle s.ot cutting device comprising a circular slot cuttir.g wheel. Durir.guse of the known device the cutting wheel is rotated while mcvin.i itparti·/ outside its housing to eut a slot in the surrounding casingsr wei-bore, whcreupon the cutting wheel is rétractée agam. i.-.tc the n.tusing and the device is withdrawn from the well. Other devises•impioying a circular slot cutting wheel are disclosed in US patentspécifications Ho. 4,106,561 and 4,220,201. •h orawcack of these known slot cutting devices is tr.at thec.êutÎi of tse slot made in the underground formation is relative?.· "ai. -a c t.te maximum extension of the cutting wheel ic les.', t.tau•r "ne ci motet of the borehole. T?’ pater.t upecii icatior. No. 842,545 and US patentspécifications Nos. 1,406,351 and 2,178,554 disclose chamsaw -we 1 .s.ottir.g device;; which comprise compiex mechanisms ion r.i.tacir.c '."··saw art tèt.ween. . ts longitudinal ar.d latéral position.. 010398 is an objective of the présent invention to prcvide a devicewhich ?.akes it possible to increase the area and depth of the slotraade adjacent to a well traversing an underground formation so as toimprove the communication between the wellbore and the surrotinding 5 formation.
The apparatus according to the invention comprises a sa·*· armwhich is hmgeabiy joined to a housing such that the sa*· arm ishingeable between a first position wherein the saw arm extencssubstantiaily parallel to a longitudinal axis of the housing and a ij second position wherein the saw arm extends in a direction away from the longitudinal axis of the housing. The saw arm is ecpiipped withan endless chair, on which a sériés of cutting éléments are mcuntedand drive means are présent for inducing the chain to rotate aroundthe saw arm.
Furthermore, the drive means comprise a hydraulic motor whichis slidabl·/ arranged inside the housing such that in response toexertmg hydraulic pressure on the motor, the motor is shifted alor.gthe housing together with a hingeing mechanism which thereby indicest.!ie saw arm to h.inge towards the second position, and the device j further comprises a spring mechanism which induces the saw arm: to hinge back towards the first position in the absence of a hydraulicpressure across the motor.
Preferably the saw arm ts formed by an oblong brade and thedrive means for inducing the endless cham to rotate around the saw i 2 ” C 2'C J.’ -J i irivc snafc which is dnven by a hydraulic positive : : .'r, mo r or si the Zoineau type. ? r c f r t-i ri y ' the hir.gemg mechanism comprises a spur gear which ts f_ i Λ A □ - O ’;he supportée end of the saw arm and a piston assembly 1 Γ- ~ :~t 1 y l ·.* s t h e motor and a teethed bar of which the ceeti. •'ûsperate w:th me spur gf;ar.
3 • J3i;>LMVλ.;<α*;μ£ΛΚ*7Λ^~ ' ' ". ..//-:, Λ4φ&amp; 010398
Figure 2 shows schematically a partial cross - sect i on ci thecutting device, drawn to a scale which differs from tr.e s:ale ifF igure 1. Référencé :s new made to Figure 1 showing a well 1 traversmgan underground formation 2. The well 1 comprises a borehcle 3 mwhich a casing 5 has been installed. The annular space betwe-er. thecasing 5 and the wall of the borehole 3 is filled with cernent
The cutting device 10 of the présent invention cccçnseshousing il and a saw arm 15 which is hingeablv joined to thehousing il. The saw arm 15 is surrounded by an endless chair. 24provided with cutting éléments 25. The cutting device 12 furtherincludes a device 17 for hingeing the saw arm 15 relative te thehousing il, a motor (not shown), and a transmission system 21 :orinducing the endless chain 24 to rotate around the saw art*. 15.
The cutting device 10 is suspended within the well I at thelower end of a pipe 21. During lowering the cutting device 11 mtcthe well 1, the saw arm 15 is maintained in a first position wr.ereinthe saw arm 15 extends parallel to the longitudinal axis 1 ci tc.ehousing il. wher. the cutting device has arrived at the locationwhere a slot is to be eut in the casing 5 and surroundi.tg formation 2, the motor is activated to drive the endless chair. 14. 5imultaneously the saw arm 15 is gradually hinged towarts a seccr.dposition wherem the saw arm 15 extends in a direction iwa·.· fit* t.'.elongitudinal azis I of the housing il. As shown in Fiacre , ir. ihesecond position the saw arm 15 extends perpendicular te ihelongitudinal azis I of the housing 11. Then the cutting ie'.zce .1 isdisplaced upwards through the well 1, and the cuttma élémentsthe endless chair. 2-1 eut an elongated slot 23 through the .us:n.* 5 4 ,i>iÀssïsSja£>._
01039? the cerner.- annulus 7 and the surroundir.g formation 2. When the * velongated slot 23 has obtained its desired length, the saw arm 15 is hmged back te the first position, and the cutting device IC is withdrawn from the well 1. The surface area on each face cf the elongated slot 23 is the length of the elongated slot 23 times the depth of the siot 23 which is the dimension of the slot perpendicular to the well 1.
The length of the saw arm 15 is so selected that the depth ofthe elongated siot 23 is between 3.25 and 3.0 times or greater than H) 15 20 the diameter of the drilled borehole 2, and suitably between 0.5 and 1.50 ttmes the diameter cf the drilled borehole 2.
The cutting device 10 shown m Figure 1 will be described in more cetai. with reference to Figure 2. The cutting device ICcomprises a housing 11 and a saw arm 15, which is hingeably goined o the housing il. The saw arm 15 is rotatable between a first position wherem the saw arm 15 extends parallei to the longitudinalaxis cf the housing 11 and a second position wherem the saw arm 15extends m a direction away from the longitudinal axis of thehousing 11, as shown in Figure 2.
The cutting device further mcludes a device 17 for hingemg the saw arm 15 relative to the housing 11, and a motor 27 providedwith a splir.ed telescopic output shaft 26 and a transmission System20 for mducing an endless chain 24 provided with cutting éléments25 to rotate around the saw arm 15.
The er.c.ess chain 24 passes over a pulley or Socket wheei 2?which is arranged at the supported ena cf the saw arm 15. The pulleyor socx.ec wr.eei 2 5 is connected to a drive shaft 30, whic.t isrotatah-y gomed to the housing 11 oy a bearmg assembly no:snowni. The direction of the drive shaft 30 is perpendicular to the1 or.gi t ucr r.a 1 axis 1 of the housing 11, and the saw arm 15 ish i nqeac 1 γ gemed to the drive shaft 30.
The drive shaft 30 is m its turn driver, by the transmissionSystem 21. T.te transmission System comprises a straight or heiioaloevel gear, r.aving a anver, gear wheei 31 gomed to the drive s.-.aft31 and a drivmg gear wheei 32 attached to the lower end cf the Ο 1 0395 r. e 2 e s c c p z c output snaft 26 si the motet 27. The teiescopic output snaic 2 E -s support·.·;: r.ear the dnvmg gear wheel 22 by means of a support rot sr.owr., that prevents axial and latéral dispiacement oi the end g f the teiescopic output shaft 28. 5 The : r.evice 1" for hingemg the saw arm 15 incluses a device 35 causmg a car 3" te translate m the longitudinal direction of the nousmg 1 1 ar.o a device 39 which converts the translation of the bar 3 7 in zc r station of the saw arm 15. The device 3? comprises a spur g g a r 4 0 c o-operatmg with teeth 41 on the bar 37. The spur gear 40 is provided with an arm 42 which is gomed to the saw arm 15 co t ransr,; t the rotation of the spur gear 40 te the saw arm 15. The c ievice 35 causmg the bar 37 to translate m the 1 ο n ç ; : u d i j sai direction of the housing 11 comprises a piston 45 proviced with an opening 4ô and a tubuiar driver asseistiy 48, which 15 tubuia r h: river assembly 4 8' comprises an outer tube 4? and an ir.ner tube 33. r 2he upper end ci the outer tube 49 is jomed to the piston 4 3’ a n h t h, > .· car 37 is roir.ed to the lower end of the rr.ner tube 50. Trie r ousing il is provided with an inwardly p rot ru cm g nr.q 52, and Ch·.· 01 iter tube 49 is provided with a shoulder 53 sc that the 20 movement c :f the device 35 is Iimited between the first cosition whereir. che shoulder 53 is m contact with the inwardly protrudingrang 52 anc the second position wherein the piston 45 is in contact with the r nwardly protruding ring 52. The toothed bar 3~ and the spu r gea r 40 are so desiar.ed that m the first position the saw arm .he direction of the housmg 11 and that m tne second position t h·.· saw arm 15 extends nernendicular te the housir.g 11. support ri ousmg is furtnermore provided with an mwardiy protruarng r.g 55, and the mner tube 50 is provided with an outwardiy ring 56. 1 r. the annula: space 60 between the mner tube 5 , and ;.·· nous me il twe sprmgs are arranges: a returr. sprmg 62 .rnatec ce - y y s .n *. n ê ι n wa n y - y py c i r u u i r ci s u pp c r i r i r.c ce à n ex c. ηe z a <. w a r a . y seeweer, m p:;:ruu-r.p r;?y Su, a nu a ;cnpre£s;:r, sprmn 6 4 arranges e y y g Wct r ci 2 / n r s c. r a □ ι n g r r r. g 5 o a n ci c. r. e o v» e r e r. g z z r. n e :ς fio.itir.·: s y ς n e n s i c η ζί z n ~ y n a ι n s a y u r.". „ \ η i c r. u - - r ws z z. &amp; z n a r n s a y 10 15 20 010398 to rejponà to nard spots m the casing and/or surrour.dimg :eæntlinir.ç ans formation. T.'.e motor 22 îs fixes to the ir.ner tube 50 by sear.a ci supports62 ans 68, and the teiescopic outçut shaft 26 ci the m.ccor 2~extenss through openmg 20 m plate 21.
The motor 22 is a hydraulic positive displaoemen: rôtir ci theMoineau type. The motor 22 is arranges co-axially te thelongitudinal axis 1 of the housmg 11. The upper support c" is aring t.nat prevents fluid for powenng the motor 22 from leasingawa y. string normal operation, the cutting devise 12 is ioweres mtcthe le.. 1 see Figure 1) at the lower end of pipe 21. E'urmg1 owenne the cutting device 10 the saw arm 15 îs m the first, co-axial position relative to the longitudinal axis 1. Then the noter22 is activated by passing a dnving fluid through the pipe 21, thisfluid passes via opemng 4 6 into the positive displacement noter 22.
The telescopic output shaft 28 of the moter 22 drives the er.dlesschain 14 wit.n the cutting éléments 25 vu the transmission System •m . <_ υ .
The fluid supplied through the pipe 21 also acts on tne piston45, and as a resuit the device 35 for causing the bar ?2 totranslate moves downwards, and the saw arm 15 will gracually hengesowurds to a position away from the longitudinal axis 1 of tr.e n ouûine 11. Wnen the saw a rm 15 îs rotateci the cutnr.g eierrerts ? cô : t h r s - g h tne casing 5 ( see Figure i), the cemer.t laver ~ ans the ;r.af: rqrs ir.d forma tion 2. Wher. the saw arr 15 eziter.hs ir. tr.e sesi reh uterai direction relative to the longitudinal axis 1, t.ne cuttinguevice 11 is pulled upwards to form tne elonaated slct 23 m theunaergrcund formation 2.
Wher. the elongated slot 23 nas got its de s i r ed ienct.o, tne.••uppi'/ ci fluid is interrupted, and tne return sprmg 62 forces tneuevice u: for causing the bar 37 te rotate upwards so that the sawa rm. 1 t returns to its first, co-axial position. Thereupot. tnecutting uevice 10 tan ne removed from. tne well 1. , ----. - r if ' _ 7 - 010398 Tr.e .enqtr. of the saw arm iô is r. et iimited by the diameter ci me r.cusir.g or oi the borehoie, there: : c r e tr.e sept.-, zi the s i et car. be m.aoe much greater char, the depth tr :at car. be maae with the Knowr. cuttmg tevices whlih err.picy a circula ir cuttir.a fciaae. Moreover, tr.e 5 eiongâtec siot of the présent mver.tic :r. has fiat waiis, therefere appiicat.cn ci a siot res ni t s m a pre :3uc11 οn gain of at ieast 25» whe.n comparée te tonventionei perforât .10ns r.avir.g the same depth are îreaies by mear.s cf a petfotatmg gur.. The eicr.aatec simaae m assoraar.se wi:h :r,e aetr.sà cf me présent invention ai.scimprcve any isrtner treatren: cf the weii suer. as oravei packmq,hydratii: tratrirm-: an-i ethe: sfir.ulafion treatsients. Λ.-.en siots atiormm te tr.e mv-nticr. are used ir. oompination with oravei packir.g eue s tan11 aiiy nicher gains tup 10 3 C 5 * car. b e e x p e c t e d due tr.aoocnc'· zt a crur.cr.ed :one witr. lires th.il tend to piuo th·· 1 aravei :. p^rtoration tunnels ma ce with icnver.lionai sertiiatir.i mttmo àevice car be orovidec 3 with a conduit System and w:th r.ttti'in that distribute finie uses t.o drive tf.t; moter te thesattir.o •d-.-sents 1er cleaning them.
By seiectir.ç a proper density of the fluid iti the weii, tr.etiind pressure r.ear the saw arm can be controiied. The pressure canbe Larges tnar. tr.e formation pressure to iaciiitate outtmq the formaticn. A.iternatively the pressure can be les;, than the formation pressur··, a.-.o fins wiii tiow from the formation mto the weii ar.c s.eut. trie cutting eiemer.ts. moi or or z:.·· uev; m cescncea ; .oyo r u - i 0, pco^tiv»· ci c n ia cernent net: ir, but msteac tf.ê m.otor oar ~~ , ,-.-.-1:111..: t.iti:.-! cr an e.ectnc .» rotor. . f n case the m.otor i o or. ver. .-.·.· a fim-, t;.e cuttinc devise v ...cm . an ‘»^ectric m.otor tne cuttinc aevice z.z uttacr.ec to tr.e ow··: er.i si sn -.=11111 iine or a mtr. u.t ^ecmic .-ne. A^terrativeiy tr -.e cutiir.g devise :ar. ce rromceo witr. a -. r a n cm. i c c i c n svsten th; it transmet rotation et tr.*- 010398 pipe en wr.ich the device i s iowe reà m to the wel 1 to the endless chair..
The car 37 can be replaced b y a rotatabie spindie dnven b y anelectric r.otor, which spindie co-cperates with the spur gear.
The cutting device acccrdmg to the présent invention can beequipped with more than one saw arm,, for exam.pie with two symmetncal saw arrr.s. ir. s u ch case the second saw arm (not snown) may ce hmceable about t he dri ve snaft 3 0 and may be induced to h mge b y means o f a spur gea r which is dnven by a toothed bar. Such
If) 15 20 tootned bar and spur gear may be arranged in a mirror position withrespect te the spur gear 4 0 and tocthed bar 37 as showr, m Figure 2.
As aesenbed with référencé to Figure 1 the cutting élémentseut throug.n the casmg, the cernent and the formation. It wiil beunderstood chat when the weil is ccm.pieted with a imer, the cuttmgéléments wiil eut through the Imer, and that when the weil îs anopen hoie tne eut wiil or.ly be made m the formation. rurthermore, if the weil contair.s a Steel casmg or Imer thedevice may be equipped with a circulai saw blade wnich first cuts aslot. m the casing or iiner and the chain saw îs ther. hinged throughthe thus eut slot to eut a slot m the cernent lming and surroundingformata on.
The weil as sbown m Figure 1 was a vertical weil, however, theapplication of the cutting device accordina to the présent inventionis not restneted to vertical wclls. The weil can also be an inclinée or r.onrontal weil, in which case the term. 'upwards1 meansi.nto direction nearer to the weilhead1 .
Dependmg on the motor and the transmission System the endlessm.nr. car. rotate m two directions.
Tne elor.gated slot car. be made travelling upwards ias aesenbes wit.n relerer.ee to Figure 1, or cownwaros.
The cuttmg éléments 21 are maoe cl wea r-res i s tant matenal, rai:, as tur.gsten oarbice, or naturel or synthetic diamonc.
It wili ce understood that there are numerous possibiiities to ireate a r.ir.geinq mecnanism which gradually hinges the saw arm 15zowaros tne .atetil ossitiot showr. i r. Figure 1 while the cuttmg 9 ù 1 0398 eletr.er.es 25 are cutUng a slot and which returns thethe longitudinal position after the slot has been eu
Thus it îs to be unaerstood that the ertbodimentcuttir.g devise shown m the drawmas is illustrative s au- ar~ ir.to o£ the 5_et or.l ·.·.

Claims (1)

  1. ddsbtl*.liàAiSti Ο 1 0398 TS 5008 PCT cuttmg device fer mailing a slot adjacent te a welltraversing an underground formation, the device ccrnipnsmg a sawarm (15( whtch rs hingeably goined to a housing (11' suer, thae thesaw arm (15. is hingeable between a first position wherein the sawarm (15; entends substantiel!·/ parallel to a longitudinal axis >.:)of the housmg (11) and a second position wherein the sav arm 15 / •extends in a direction away front the Longitudinal axis ;1 of thehousing (11,- , an endlens Chain (24) provided with cuttmgéléments (25, surrounding the saw arm (15) and drive mean.s forinducing the chair. (24) to rotate around the saw arm. (15;characturized m that; the drive means comprise a hydraulicmot:or (27) which is slidably arranged inside the housing 11 suchthat in respense to exerting hydraulic pressure on the m.ctor (2”) .the raotor is shifted along the housing (11) together with a hir.gemgrtechanism (17, which thereby induces the saw arm (15' to h mgetowards the second position, and that the device further comprises aupring mochaumm· (52, G4) which induces the saw arm 15' to rancestek towards "se : irst; position m the absence of a hydr.iuLic pressure cross the motor sc . 1 Cite cuttmg device acctt'ding te ciaim 1, where::: tire -otor 27; m -i hydraulic, positive dispiacement metor arrangea mtse stusmo 1. substantia.ly co-axial to the longitudinal-•sis :) of the hcurinq. ·. . ’lhe tuttmg d-vice acco: ding to daim i or 2, whereir tses.sge.sg memas.sn 1", .-emprises a spur gear (40, whicr. : s fixée t fr.·: supplies êr.e s r me saw irm 15· , and a piste ; : whi ss the : ·-··ιη όοοό ata witin the scur gear 4 2·
OA60958A 1994-08-02 1997-01-31 Device for making a slot in an underground formation OA10398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94202239 1994-08-02

Publications (1)

Publication Number Publication Date
OA10398A true OA10398A (en) 2001-12-04

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OA60958A OA10398A (en) 1994-08-02 1997-01-31 Device for making a slot in an underground formation

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EP (1) EP0774039B1 (en)
CN (1) CN1052292C (en)
AU (1) AU682280B2 (en)
BR (1) BR9508463A (en)
CO (1) CO4440615A1 (en)
DE (1) DE69503251T2 (en)
DK (1) DK0774039T3 (en)
NO (1) NO312421B1 (en)
NZ (1) NZ291437A (en)
OA (1) OA10398A (en)
RU (1) RU2137912C1 (en)
WO (1) WO1996004457A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104775813A (en) * 2015-03-26 2015-07-15 天地科技股份有限公司 Openable/closable inside-hole longitudinal slot-cutting apparatus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9522688D0 (en) * 1995-11-06 1996-01-10 Red Baron Oil Tools Rental Apparatus for forming a slot in a wellbore
GB0226725D0 (en) * 2002-11-15 2002-12-24 Bp Exploration Operating method
CN101240697B (en) * 2008-03-13 2010-12-01 上海交通大学 Minisize down-hole lateral wall annular recess cutting implement
RU2464411C2 (en) * 2010-11-09 2012-10-20 Михаил Павлович Сергиенко Method of exposing productive beds and device to this end
GB201100975D0 (en) * 2011-01-20 2011-03-09 Lee Paul B Downhole tools
US9371698B2 (en) 2013-11-06 2016-06-21 Bernard Compton Chung Subsurface formation cutter
MX2017000642A (en) 2014-07-14 2017-10-02 Aarbakke Innovation A S Wellbore intervention tool for penetrating obstructions in a wellbore.
NO341205B1 (en) * 2015-05-19 2017-09-11 Sintef Tto As Milling tool with self driven active side cutters
CN105952380B (en) * 2016-06-17 2018-06-29 四川众基精锚工程技术有限公司 A kind of mould broaching equipment and its expanding method
EA034113B1 (en) * 2018-01-15 2019-12-27 Общество С Ограниченной Ответственностью "Научная Компания "Луч" Working element of perforating device
CN108954881B (en) * 2018-07-27 2020-05-19 贵州省智慧能源股份有限公司 Deep geothermal well slotting device and method
RU2751046C1 (en) * 2020-11-18 2021-07-07 Акционерное общество "Азимут" (АО "Азимут") Hydromechanical slit puncher

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1406351A (en) * 1920-09-04 1922-02-14 Clyde S Corrigan Control bracket gear for deep-well-enlarging and cistern-making machines
US2178554A (en) * 1938-01-26 1939-11-07 Clifford P Bowie Well slotter
GB842549A (en) * 1959-03-20 1960-07-27 Ramsey Smith Deep well chain saw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104775813A (en) * 2015-03-26 2015-07-15 天地科技股份有限公司 Openable/closable inside-hole longitudinal slot-cutting apparatus

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DE69503251T2 (en) 1998-11-12
NO312421B1 (en) 2002-05-06
EP0774039B1 (en) 1998-07-01
CN1154731A (en) 1997-07-16
DK0774039T3 (en) 1999-04-12
AU3256795A (en) 1996-03-04
DE69503251D1 (en) 1998-08-06
RU2137912C1 (en) 1999-09-20
CN1052292C (en) 2000-05-10
NZ291437A (en) 1998-08-26
EP0774039A1 (en) 1997-05-21
BR9508463A (en) 1997-12-30
AU682280B2 (en) 1997-09-25
CO4440615A1 (en) 1997-05-07
WO1996004457A1 (en) 1996-02-15
NO970400L (en) 1997-01-30
NO970400D0 (en) 1997-01-30

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