GB2412683A - Tubing perforator having a punch that can be reset to perform repeated perforations - Google Patents

Abstract

A perforator apparatus for punching holes in tubing within a well bore in which the apparatus is positioned comprises a punch (60) mounted within a housing (66) and retained in a holder (58) positioned on a tapered track (62); an opening in the housing (66) aligned with the punch (60); and hydraulically controlled means (20) including a movable ram (38) connected to the punch (60) within the housing (66). The housing (66) is adapted for positioning within tubing of a well bore. The hydraulically controlled means (20) selectively moves the punch (60) through the opening and into punching contact with the tubing with force sufficient to punch a hole therein. Thereafter the hydraulically controlled means (20) returns the punch (60) to the position within the housing. The punch may be operated to perform repeated punching operations without requiring removal from the well bore and associated tubing. The hydraulically controlled means can comprise a piston (48). A first valve (24, figure 3b) is provided for selectively metering fluid to a first side of the piston to move the piston linearly within the housing in a first direction, and to selectively prevent fluid flow to the first side of the piston to permit the piston to move linearly within the housing in a second direction opposed to the first direction. A second valve (26, figure 3c) is provided for preventing fluid flow to a second side of the piston opposite the first side thereof during metering of fluid flow to the first side of the piston by the first valve, and for metering fluid flow to the second side of the piston when the fluid flow to the first side of the piston is prevented by the first valve to move the piston in the second direction. The valves' (24, 26) conditions change as flow rate changes.

Description

24 1 2683 T\11:1LTl-Sl-lOT TIJBlG PERFORATOR The present invention relates

to a multi-shot punch perforator for use in lullchil1, roles ill tulill-, \Nit:llill J \N'el1 ho-c.

In of] and <,as drilling operations. it is common pT-acticc to use a \vireline for tailing aridoNN/erin, tools into the weld bore. Slecifical] ! this is achieved by attaching a toc:]strin to the end of a reel of a single striid or braided Arc. F}v (l reeling out the wile. the toolstTin may To lowered to the cicsircd location within the \Nel1 The k!olstring cousists of a lurality of indi\idua1 tools connected to,,ctiicI- to foln a \N'Olli?l U?lit. I]ese tools ll.y ilclude data-?-et-ie\!i?10 de\:ices ilcl cie\ices fo pe- io?l?lig otilei- fuetio?ls uitl? rcs?icCt to tile \N;ell hc'-e tubilg il?ClUdill JlUllCl?illo olel?il?=S il? the tU6i?lo io? Va?ioUS pUIpOSCS iilClUdillp 3: accessing lateral hores cxLenciing fic-'m the verLica1 ueil hore intc, \V]liCll the tool.stnnO is inserted.

lIA Ipplicatio?ls wlelci?l llU?lClli??o is to he le?-fo-nied. pio art devices used fo? tilis pu-pose r-ec?ui-e e?lova1 fic!??1 [lie ueil 1:'c!?e afte?- eael? puleli?ly operation 0() to ead> tl?e 1:,ullCllill, de\ice iO? tllc ?1C>;t ope-atio1 the eoi: T]lis co?stitutcs a eu?beT-so??1 e a?i d ti ??1 e- eols Ul1 i 1 <, C!pC? ati 0?.

T]le piescI?t il?\'CIltiOIJ p?ovides a i1lu]ti-shot 1gulcl pe?-forator ??lechcnisll' Ilc-ei? ,ultille pu?chiilo opeT-atio?ls i?la,N he jc?ioliled uitl?out -equiri10 lCl?l(Val ()i tile 11lnch}1C?f(!?ator ti(??? tilC NN'C'l1 hr'-e.

Aceo-di?' to a fi-st aspect of tile i?Ne?lLio?l. tle-e is jrovicied a lefo-ato?- app.-,ltus fO? lQuic]liilo 11oles il? tU6il?o Wit]?il1 a uel1 ho-e i1. ?lich tile c,Tllaratus is positio?led comp?isin-: 3 a 1lUl?Ci] ?llOUl?tOd \N'itllii? Li}lOUSil?= a?ld ?ettlit?Cd il? a 1lolde-lcsitio?ecl o a tale?-ed trJcli. said llousi?_ 1eil0.rdaltecl fo- lOSitiOli?= u itl?i tubilog of a \N:el] I(re; LIl? Opellilig il? said l?ocisi??_ ali=?ccl u itl s.id IlUlC]?: ai?c hNydraulical]y control]ccl means including a moN able ram connected to said punch witllin said housin lor selectivcl! mo\!in, .said punch throu<,h said opcnin and into punchin contact witll said tUhin" VN'ith force.sufficicn1 to puncl1 a hole therein, and thercaftct- retuming, said punch to said position vvitllin saicl housin.

wheT-chy said punc}1 WaN' he operated to pCrfonn repCated punching operations Wit}lout requiri rcmc-'val fi-om said vNel1 horc and associated tubingn Actvantagreously the hvdraulicallN controlled means nay fu1hcr include a hN/draulic contri-1 valve for controllin m-vement oi thc ram relatiNe to the pUilCh. 1()

Prel-erahl,N:, the ram is moulted witllin the housin for se}ecti\c linear movemet therein toward and avvay fi-om thc pUnC}1 hy thc hNydraulic control wal\'c.

T'rctcrahlv, means are provided for preventin movement o( the housing vNithin the tubing durin puncllinO thercoi'hy the punch Advantager-usl,N, thc punch may he retainecJ in a holder positioned on thc tapered track coected to the ram Prefcrably, in opcratio of thc perl'orator apparatus, thc ram during sclectiNc linear noNement thercoi' avNay fr om the punch causes thc tapeT-ed tracL to COrrC'SpOlidinoly moVc to thereby cxtenct the pucT1 t}lrOUgh the opening ito punching enOagement vvith the tuling l''hereai'ter, the ram ciuring sclecti\e linear : mnvemet thcrcoi'tovvard the punch causes the tapered track to con- espondinglNy mo\e to therel:,,v retract thc punch hack throu_}1 the opening ad into thc housinO 1 this manner, the purlch is positioned and r eady for additional pulching, operations.

3(' Advantaccously, thc hydraulic control valve may operate at least one piston acth on the ran to inlpat thc novcment to thc ram relative to thc puncl1 I'rci'crallv. thc ne ns t'cr preN cltinC novenct of tlle}lnusino during the punching, operation ma!; include a plura]it\7 of h!ciraulicallN Crated anchc7rin<, sli]1s that (!pCrate to e7'1"a"e tint' tubing eurin<T launchings thercoi'h! the punch and thereafter disengage troth the tukino upon completion o77'tile Chin" operatic.

s In a pT-eJ'crrccl a.sect of't7he invc7ltion. the 1crt'iorator allaratus ma! include a pUlIC]] 1110UlItCd NN!itilil1 a lousi, adalited Jo7loSitio7i7'n, NN!itilil tuli7,l of tile NNel] kcre. an e7pe7in, in the housin<' aii,ned with the 1:'unch. and h!draulical]! contrc711ed means v!ithin the hou.sin, for selecti\elN mo\ino the p7unch throuch the opcin a7'ad into punching contact \Aith thc hhi7= to punch a hole therein. and i(7 thcreatler Tetunling tile pullch to Lhe po.sition vit]lin Lhe hOUSiTlg. The hydraulically coTtolled TcaTIs inav iiclude a liStOTI adapted ioT lilleat TllOVeTllCTlt iT1 ollDosCd clicctioTIs N,itliT1 tile 1lousin. A fiTst val\c is pTON'ided ioT selectively IneteTing licluid Jo\N to a i;rst side oi tile piStOi1 to Tllove the pisLo1 1iTIearlv \NiL] liT tllc ilOUSill' iT] a ilrst diIectiol. aud to selcctive]v 1': e\teilt liquid I1O\N! to the fiT-st side 3> of tile;?iStC'T to pcrTlit tl1e 1iston to Tll<>ve liTleaTly NA'itiliTF tile ilOUSiTIe, il1 a secoTld cliT-ectioT oplcTsc-d to tllC iiTSt diTCCtiOTI. A secoTd v a]ve naN,! he:Tovidcd foT pT-cve:ItiTly 1iquid 110NN' to a sccoT6 side oI t]lC pisto olposite thc fiT.st side theTeoi duriTl, Tl1etcTiTI' of fluid iloNN to tile fiTst sicle of tllC liStOTI b, N' tlc fiTsl valve. aTld ici TlleteriT1' 1iquid flo\N to t]e sccoTId side c-f tile piStOTI \N!]leTI tilC 1iquid flONN' to N tile fiT-st side of t] lC pisLoi1 is pTeveTIted bv a f;T-st \/.1IVC to TnoNe the piStOT1 ill the second direction.

lcTfoTatoT aP1)aTatUS T11a,N, jT1C1Ude TT1eteT jI]Y Of thc liquid flO\N! iT1 a coTTlTno diTC'CtioT] h,N' tllC f;TSt V]l\7C aT1d b,N' Llle SeCOlId \'a]\'C SeleCti\!ClN,' to t]le first sicle of tile piSt.OTI tiT]d to tile secold side of tl1e]1iStOlI. T cspCctively.

pTcieT-abl)/. tile 11ousil1g oi tlc pCTioTItoT a]])JTatUS iS tulu]a- aild tic licluid flov' is metcTed bv the first val\e throu"]1 an anw]ar licluid passapc sAiithin the housi1g, and the secoTd]iquid flo is neteTec1 by the seccnd valve thT-ou=.h a 0 tubula- lijuid l.ss.:,e extediTI liTeaTl,v t]lTOU] t]lC, aTITlulaT f1uid lassapc.

AdvaTlia,,ecuslN,, tle fiTst v.lve.d tile sccoTId v alve Tla) bc IositioTed Witli tlTe lOWSiTlt, at a loCOtioT] TCI1lOtC fI-OT]T tlic])i. StOf1 alla o]]losite tllC fTTSt siclc thCT eof.

lrefcT ahl,N. the first valN:c and the secnd v alve arc adapted for 1iTlear TTIo\eTlcTlt hetuceT1 olcTcd ar1 closed pOSitiOTlS NVitilil] t}le} lOUSiTlt' il1 rCSilOTISC to selcctecl;1TeSSUTe of 1iqUi(T 110NN NN!ithiT] tile I]OUS;T]L'.

AN. [iUicl CoT]tTo1 TlieCllaTliSTl] tilt scicctivel! cc-TtTols olosctl Qir-ectioTlal TToweTlclt of a Iylitol. Tiot fOlTlliT1L llaT1 of tlc iT] \ieT]tioT] as claiTlled. hut tIlat rilaN/ he used sA'ith th(' punch perfoT]tor in acc<!rdance NN'ith the in\entior1 comprises a ] } liStOT1.(TaT)ted j()T IITIear T110VCI11ent jTT O]lI1QSOd diT eCtioTIS NN'itiTiD a 110US;T1L'.

SpC'CifiCallN'. t}le pi.StoT] theTeof iS usCd to activate the puricil of the pUTICh peri of-at or.

A fTT-st val\e is pT-o\7icicd iT1 t}le rfc,rcsaid fluid coTltT-ol mccilaTlisTIl fo: 4- selecti\!el! meterinr fluid to a first side ol the pistoD tfi TllO\'e the piStOT1 1iTlCaTlN,' uitlil t}e 11OUSIT]' iT] a fiT-st directioTl. ald to SeleCti\'e]N,' pre\ieTlt flTTid f]QNN' to tile fiTSt side ol the piStoT] to pemlit the piStoT] to T11O\'C 1iTlOaTlN'NVitiliT1 the}lOUSiTl iT1 a secold direction oposed to the fii-st directioTl. A second val\:e is provided iT1 the afoT-csaid fluid co:tT-ol illecilarisTl1 -foT- lre\cTtiTly fluid flONN to a sccoTlcl side of the 0' liStorl o}l'cisite tile fiTst side tileT-eot duT-il TTcteTiTI:, of fluid llov to tile first side Qf tile piStOT1 hy tllc first walNc. aTld IOT InCtCT-iTI Muid flo\N to t}lC secoTld side of t}le piStOT1 NvLeT1 tile fluid floN: to tile first side 01 tile piStOT1 is pTC\7eTlted by tile fITSt N[a1\IC tO T]10\IC the}iStoT il t}le secoTd diT-ectioTl.

\7itil sucl] a fluid coTltTo1 v al\<e Tlecil.rlistIl, tile lluicl 110\N is Tlctered jTT a COTT1T]10T] djTeCtjOT] 11Y tile fiT-St Vll\'e aTl] 5,N' tle secoid Nalve selcctivel,N to tile first sicie Qt tlc piStOT1 aT16 to t]lC SCCOTld sicic 0[ tle 1'isto. rcs}ccti\:ely.

T]e]iOUSiTT ol tile fluid CoT1tTOI TllCCiTciTliSTI1 iS tUl)UlaT aTld tlc fluid flo\N: is 3() T]leteTOd hN' t]le iiTSt N'al\'e tilTOU']l.iT1 ÏTT]UIar fluid lassae N'itllil tllis 1lOUSiT].

Tle secoTd fluid flo\N is,eteTCd hv tle secclcl v.lve tilrou_ll a tubulaTfluid lassa-rc CXtC'TldiTI, liT1eaTl\ tillL-"l1 tIc IT1TlLIl.lT [lLlic lassl,:e.

Thc frst ancl.second Na]ves maN- hc positiQncd Nvitllin thc housing at a location remote iron the iston ad olisitc thc firsl side tliereof.

Thc first valN;c and the scconcl Nal\;e ->t the fluid contrc1 mechanism are adaptecl Jor linear mC1N/ement hetNNeen open anci C]i)SeCI positions \N'ithill the cusi' i:: -eslolsc tc, selected]ICSSUiG' of fluid;1O\N N'itilil] tile]lOUSill=.

lie t]uicl flc>NN a! hc ot a liquid o Tas.

]( The hcusin ot thc aforesaid ncchanism naN he positioed uithin a well bore.

lhe aforesaid meciialism, includirlg the hcusing thercot. may be a comloncnt ct a toolstring.

There nONN tolloNN'S a descriptio of prcf en-cd einhcdiniellts ot the inN; cntion by NVa,\7 ot non-linlitin examle NNith rcterence being made to the accompanying d:- is. i1 NlliCIl: (' Fiure I is a partial scctic'lal N'iCNV ot a hydraulic anchor assembly and a hydraulic coitiol val\e of a punch perforator; Figure 2 is a vie; sinilar to Figur-e I cf a h!draulic raril assembly and a punch mechaiiisn of a pulch p erfcratcr; F iurcs 3a to 'c S]10\N'paltid] SCCtiOllal ViON\; S ol the hydraulic COlltlO1 V.I]N;C shosA;n in Figure I;ith desirnated portiols thcreot hein:, h a lare cross-section.

as sho\vn in I igurcs h and.c: and (' J igure 4 is a perspectiN;e vie. \Aith pai-ts hr,l<en awaNy of thc hydraulic C!ltr;>l valN;e SI\i ir liu-es 1 lld.

I'hcsc fout- ctmpollents ot' thc punch lcrlorator are conlectcd as hiclicatcd hN the an-,ws to constitute thc as.sembl! of thc 1lerfotato: alpatatus accordit1a to a ctlhr\ditctlt! tllc iN ctic,.

\\ ith rcletence to 1- jr 1 oi the drau it.s. a coileil tubitt atichir a. ssemblv.

dcsirnatcr:3 as 1(). is activated hN itltCnid1 1iquid pt-essurc. Secificall! Nvithit the hi!USin<, 1 of this assctnbl!' t'terc is 1r,vidcd a piston 14 atld atchori?t slips 1( h]N'iD<, scn-atios 3 on the outet- . surt;ace thcreol: B! alplN:it, a selected pressuT-e to thc piston 14 Nvithin thc hOUSitl" 1 0. thc l(J l1;SIO1] tnO\?eS Ii11CaI1N to cause the slips 1fi to tnoNe radiall! ink' contact vvith the vall ol t}lC tubin (not ShO\N'tt). The sen-ations 18 Nith t3c slip in this position at1ChC!t thc dcwice to thc tuhit g. This petmits aCCUtaCN,' oi yutchittc hy the as. sociated putch mechani.sttl. (ipon completion ti this operation the coiled tubing prcssurc is reduced and thc slips arc then i;-ce tc-' rest- act aNN'aN,' fiott1 thc tUbit1 ual1 I ancl tilus release the anclor assetthly and associated toolstritig cotpotlents so that tite toolstrittr compoetits ma,N hc tnoved tc-> a ne\N locatiot within tile well hot-e.

T he operaticn na,v then he releatecl to Ct-ttlit aNC11C!t-iUg iot att additiot luncilitg opet-ation.

The ?tydraulic ancilot- assenhl,N 1() is contlected to a hvcit-aulic COtittO] N alve' dcsi.rnatecl 'cticrally as '(). T he hydraulic cottrc-1 \IalNIC 9() includes a j1)USitlg:9 N!itllit] WlliCll is tovidcd a \:elccity flN: \:alNe 24 ald a cl1eck valc 96. Alsc-. \Nithin the housitly, these is provicleci an annulat- passae 77 that provides fluic3 flo\N to side.() oi. pistrn -. Lilcwise, a centi- al passac 34 O pto\ides io fluid 110WN to thc olposite sicle 16 oi thc pistott.

At a cotr-ollccJ flO\N r,ite/lressutc dillerenti.tl. thc velocity ilonA Val\!e 24 is olci atd flo\N: is direcLcci to side.() if the piston 3 ancl to the side 4Sa ot listott 4ti. Tltis tUtaiiltains tle pulicll (() in a rctractcd pOSitiOtl. Tlic chccli \<a]NC 9(' iS (-' closuci ad thet-cloi-e hloclis ilo\N to thc cettral pass.i,e 2.4. Ihctelore. no lrcssut-e is actitt: wpon side 4Sh Ot (7h ot the [JiStOtlS 48 and 67. resllectivClN. -(his ltas tle ct1cct 1 pcer;titl:. a iotce oil tite 1iston 48 to nove it do\\rtaT-cilv Witlitt tlic l(,Usit] (1 At hi] lcr intcn1al flcNN rate}ressurc cliffcrcitial. the Ne]OCit! floNN valN c 4 \vill close 1 thcrclo-c block flo\N to tle side 4Sa fit tlc 11iSt011 48. 1 iiC CllCC; valN'e 6 o}ens and floN is directed throu,h passare,4 t! sides 4Sh and 67h ot :istons 48 and 6 7. This has thc elfcct o-f encratin' a force on the pistons to mC1\'C then u ard N'ithin the housing.

Vith reicrece tc l i. 2 there is shoxAn a hNtiraulic ram assemblN desirnatecl,enerallN as:. This asscnbl! includes an upper bodN 4(). a midd]e hod,N 44. a 1O\NIer bOC;N,: 46. a first pisto 48. a second pisk, (i7. and a mandrel 5.

The pist'ns are housed in the up}er and niddle botlies and lilL throu h the mac3T-cl to the punch mec]lailisn desigrnated geera}lv as >4. at the ficdN:( tile-eoi: Tlc lulel Tleclklisn -4 iclucles bodN >(. puTcl1 tolde>. purieil 6().

tal'Ted tT-acl 62. i additioi to gTi}) SCTTaTjOD 64. pTo\!iCled OT] tllc 11ousin, (i(l oi tile pUT]CiT T1leCballiSTIl, In opCration. at 1'0\N' flO\N'/preSSUre difieTCntial. Lhe pUnCD TlleChaDiST11 remains inopei-ati\; e. As ilowipT-essure dificrcntial is incT eased. the internal pressure aets on the hYdaulic aiciloT assembly, wherel:N/ the anchoTin" slips li 0(' enga: e against the \Aal] of the tubing,. As flo\N/pressuTe difierential is further increased. the hydT-aulic ColltTol valve () switciles loNv/pTessure to the hYdraulic raTn assemlly piStOT1S 4zi and 67 to create a ioree k' mOvc thCTI1 upN\:ard. In tiliS InaMTIeT. tile,T)iStolTS lul] tile 1lUMCIl TllecllallisMl hody:(i UNN'aTd therCbN' TllC)\'ill ta} 'eed traclk ( in lilc dh-ccticn to cause the punch 6() to engatc tilC tUhiTl \N1a ,s and puncl a hile in the same.

I his JCtioT,TlFc, ]kES t]c cffcct oi MlJiTitLliTlill<' ai olpositc fOTCC OTI t]iC housin (6 oi' the puncl1 Tnechanisn >4 \N'hiCh assists in prc\ cI1till, axial T1lovcI1lelt c i tlic tocilstT ill= CiUliTlp t}le}. lUllCIliTlL olel-,ltic111. 3(>

\/1 tle llLllCll}1,LsscS tl11,ll t]C'tLli.1il1,, \N'.ll] ,1c3 11cri'DI-, ItCs tllc salle. l dIOl) ii] ilTCSSUle \Ni]] Icsult. Tllis sc-ves as al il1CliCItioTl t}It tilc]1C1.iOl-.Itill il)Cl'atit)] }]LiS CCl] ct, 743llctcci. T1t' ilter-.11 l1IcssLlic i.S t}lcI IcclLlceLl bLIcl tr, ]NN.

circulating Pressure. This has the cticct of chanrin<, hack the fl!wrcssurc difJercntial through the hydraulic control v iliac () to retune the Pistons 48 and (7 to their original Position. thus causing' retraction of tire launch 6() and release of tlie slims lti. The toolstrin. ins! their bc moNed tic another tubing= ]>catic,n and he read! for an additional erforathig c!c]c as conscribed ahoNe.

Claims (1)

1. CL II\IS 1 perforator apparatus fair punehin<, holes in tubing lecithin a

   NN eil lucre in \N'6iCh tht apparatus is positiiintd comprising: punch niounted \vithin a iousinja ancl retained in a holcier positioned on a tapered lracli saicl housin" heing adapted frr lositionij, \vithi: tubin, oi a \Nell horc: an upenin' i said housi:g aligned \N,ith said luneh: and h!'draulicall! c() ntrolled Incan.s inc}uciin" a novah}e ran ccnnected to said pUliC}l wit} in said housilc lor seleclivel> novin" said pu:ch thr-oul1 said OpCllill and int(, punchin contact \N'ith said tubin<, \N'it}] force sufficient to puneil a hole therein. and tlereafter retuning said punch to said positic- ,n NNithin said housing.

   hcrcl'! said pucl1 maN,y bc operated k! pcricnn repeated puncllinc operations \N!ithout requirin_ remo\al fi-om said \N:cll bore and associated tubing,.

   Thc erforator apparatus of'Claim I. \Nhcrcin said hvdraulical}y coltrollecl means f-'urt}ler inclucles a hydraulic contro} va}vc for coltro}ling movement of'.said ran relati\e to said pUnC}l.

   . 'l'hc lcriorator ap]:aratus of'Clain 2. \Nherci said ran is inounted N:ithli said II)US;n" for se}ccti\:e linear novcment therci to;Nartl and a\Na> fi-onl said puncil ly said hydraulic control va}\c.

   4. The pcrioi-ator apparatus of' C'lain 3' \Nherei1 means are,nro\dded for prcventing movencnt of said l;OUSjNg \vithin said tahing durin- luching thercoi' by said punch.

   5. Thc lerforakr aIparcitus oi'{laim 4' wherein saiti hydraulic coltrol val\:e opCratOs at least onc piston actin on said rarli to iinpart saicl DlO\'CmC'nt to said r,im ielative to saitl punch.

   (. 'I'hc pcrt'orakr a]paratus oi'(ilaim 5. wlcrcin Sdit1 Illeans lor prC\'Cntin24 i]Vt'll]CIlt (> 1.sait] 1lc,Isi I 4 illcl ites 1l -.ilit!' ' I' 1!r arl i cal 1! tlye.tcc-1 iicllc,-ii<r slips that peratc to entra<Te said tubing durin, punchin, thereof h!7 said punch and thereaL'tc7 disen,,7e fiom said tubin, upon completion of puncilin<T.

   7. The perforator apparatL7s of ('[aim 1. \iDercin said ram during selecti\7c linear nove7lcnl thereof an as fi-7n said punch causes said tapered track to co'nespOndin7':7l!' WO\'C to therehs extend said punch throu<Tl1 said openings into punch cn'a,emcnt with said tut-7in<, and there.7fte:- said rails cluring selective linear mo\enent thereof ton ard said punch causes said tapered track Kit corresponding] movie to therel7! retract said punc}1 hack LhrouTh said opening and idly said]lOUSint,. \Ahereb! said punch is positioned f-'rr additional yuncilin7, (})e ati (ill S. S. A pcrforakr apparatus for puncl1in7, hole.) in tubing, Within a Noel} bore Ida which the apparatus is positioned comprising: a puck} -ted Nvitllii1 a 1lOUSilIe, adapted for- pOSitiC)llill NN'itililI tUbill of a mull bore; aft o}elii, in said]lOUSill= ali<Tiled Wit} said Muscle: hydraulically controlled means Nvitllin said housing for seleeti\ely snorting said punch through said opening and into punching contact With said tubing to-, punch a hole therein, and thereafter resuming said punch to said position NN:ithin said housing; said hydraulically eonLrc-lled means including a piSiC,il adapted for linear moment in opposed direction lecithin said housing: a first valve for selectively meLeing liquid floNN to a first side of said piston to moxie said piston linearly Nvit]lin said]lOUSing in a first direction, and to selectively precut liquid fk'Nv to said first side of'said piStOil to pennit said piston to moNic linearly Within said housing in a second direction opposed to said first direction: and a second va}Nc for prcxenting liquid flow to a second side of' said piston 3(' opposite saicl first side tberec'I'cluriil, meterin_ of'licluid flo\N' to said first side of said piston by said first valve. old for mCtCring liquid Sloane to said second side of' said piston \N']ICn said liquid BONN' to said first side of said piStOil is pre\'CntCd h!' saicl first (,llYc to tl]OMC saint)i.St(!T1 ill Strip sell di-cctiol. 1()

   9. The pe?-foratcT- apparatus cf claim S. NN herein said licluid c NN is metered in 1 eommoi diteetion h! said l;T.St valve aTlc1 h! .said seconcl v,al\:e seleetiNeiv to said t;T-St sicie o saict pistol] clTICI tc- xaid SCCOT1CT side of SJ;C1 piStOTl. -esileetive],N:.

   1(). Ile TlCtTitoT alilaT^atus oi ( liill 9. Nle-eiT saicl llousiT, is hhula- ald said licluid 11C)NN is metered h) said fiT-st Nalve thT-ouh an annular I jCT,UiU 11aSSaLre NN'ittli.saici 1IOUSjT1" ac3 saicl seeoTId licluicl ilo\N is iliete-ed tl! said SCCOT]C! N a1\/C t]:rouh tullular liquid passa,e e>;tendin=, lileat-lN, thtougl1 saicl annular fluid 1 () pa.ssatTe.

   11. 'l'he perforatc!T appaT-atus c->f Claims 7. OT (). A:hereiTi said first va!Ne ald said second v,-il\<e are pc-'sitionecl uitiliTl said housin_ at a loeatioT1 remote fi-om said pisto ad oliposite saicl l;rst sicle theT-eof.

   19. The perict-atoT- appar-atus of Claims 7' S. 9 OT] (). \N7>CreiN.iaid t'irst val\!e and saicl seeoTld val\e are adapted f'or lineaT nc'Nemcnt llet\T.cen o}len and closed }l'vSitit}llS 'itlitl saic! 1l-,usiig i T-csponse to selected pre.ssure cf'liquid flN NN itili saic] l'vLSillg. _()

   13. A perfot-ator apparatus as hereinlleii!Te cleseriPed \N'ittl rCfCTC'nCe tC) tile aCCO'illpaTl,N'iDT (ila\N'iD-S. 1 1