US2073876A - Core barrel - Google Patents

Description

G. c. oLlfvER CORE BARREL 'March 16, 1937.

Fil`ed. Dec.

A'ITOR Y.

R. M OL. Y U G pli-tested Mer. 16, 193( conn Banner.

Guy c. oliver, olenaneceur. Appueeaon December 4, 1935,: serieu' No. 52,820

1a claims. (ci. ess-"12) This-invention to core barrels.

apertures at their upper-ends terminate in shoul- The eneral obiect of my invention is to iers 2I,and,a t tne'irlower-ends merge into apertures 22 which apertures 22 at their -inner ends provide a .-ore barrel including a bit-head and-a noel oore receiving member A further abject of my a core barrel with novel means circulation within the barrel.

A further object of the invention is to provide a core barrel including an outer and inner barrel for providing 1'0 so constructed and arranged that circulation, is

provided between the inner and outer barrel and wherein the .discharge of iluid from between'the barrels is effected in a novel manner.

Another object of the invention is to provide 15 novel means for a core so 'that triction between the to a minimum.

Another object of the invention is to provide no vel means foradiusting the position oi the n inner core barrel relative tothe bit. other objects and the advantages o! thisln- 'ventin will be apparent from the following description taken 'in cbnnection with panying drawing, and wherein:

Fig.1isacen sectionalview 'i'acore barrel 2 embodying the fee -of my invention;

Figfzisafragmentary viwsimilartorigd internal .ange 36 on the couplingmember 34.

A5A post 31 passes through the ange 36 and' the ripper end of this post has a nut member 38 30- and on a larger the core barrel:

Fis. 3 is al side elevation scale showingthe lower end of snowing the blt:

Fig. 5 is a section taken on line H ofFig. 2;

Referring to the drawingby reference charac-- ters I have shown myinvention as embodied in a 35 core barrel which is .indicated generally as at lll.'

As shown the core'barrel is suspended by a sub il which is suspended at the lower end of a drill.

string I2. The core barrel Ill includes a shell I3, the lower end of which is connected-to a collar i4.' The.

^ coun-14 has e blt Is secured at the lower. end

thereof.

'me bit ls' comprises e body having en enr nular ilanse. I6 thereon which is-threaded to the teef-h I1 on the lower c dge thereof which are arranged in a circular fashion and also has reamer blades i8 thereon,'which blades have ed lower cutting surfaces :I9. .'I preferably provide 50 four of these reamer bladesand their outer surfaces are eccentrically disposed, as shown in Fig.

, 4. while the cutting surfaces I9. are disposed at4 varying distances above the lower end` o i' the bit. The body of the blt is Provided with 8. plurality 5 of downwardly direcidiluid apertures-.20. 'Ihese invention is to providey barrel and orcis reduced Fig. 4 is an end view of the core barrel; and

terminate atA the inner surface 23 of the bit. The apertures 22 at their outer ends open through 5 the side of the bit behind the reamer blades i8.

The interior of the bit is threaded as at 24 Just below the shoulder 2| and the .threads zi 'engage .ture 28 I mount a stem 29 which has'a Vwrencli engaging portion in on the upper end thereof. A hollow lockcap 3i is mounted on .the stern 29 20 and when' this cap is tightened it locks the threaded stem 29 'in adjusted position."

'lllhel -stem 29 has a flange 32-'on'the lower end thereof.' 'rms aange az includes e. sku-c az which- .is threaded in the end ot a coupling member 24 25 and which engages one element of 'an anti-friction bearing 25. The anti-friction bearing rests on an thereon which en ges the-.anti-fricti-m bearing 35 to thereby rota Jably support the'post. 'C The post 31- is provided witha depending skirt- 4I which is providedwith circugnferentially arranged apertures 42, and the lower end of the 35 slrirt is. threaded as at .43., An inner barrel 44 has its end threaded to engage the threads 43.

'I'he outer diameter of the skirt ,4i and inner barrel 44 is less than the inner diameter of the bar- 'rel 44 so that a space 45 is provided between the 40 two barrels. The upper-end of the space 45 communicates through the apertures 42 .with

the interior ofthe inner barrel. while the lower lower end of the collar. The bit also has cutting or dog 48.

end of the aperture '45 communicates with the inner end of the apertures 22.

Mounted on the lower ,endof the bit I show a core catcher assembly 46 which is provided with a plurality of slots '41 in its-lower end. I n each of these slots 41 I pivotally mount a catch meminner faces .50 and are normally urged -to the position shown in- Fig. 2 by springs SLI Mounted .on the lower end oi the core catcherassembly 46 I show a. flanged collar .52.which ts within the bit and which has a lower end which closes 55 These V,dogs -48 have bevelled 60 L. the slots 41. The core catcher assembly ha: a bevel mee sa te direct fluid into the apertures 2 The interior of the core catcher assinbly is provided with a plurality' of resilient 6 nngers B4 which are secured at their lower ends as by rivets 54'. 'I'he core catcher assembly 46 is preferably made of bronze and has a rubber sleeve i5 vulcanized therein. 'I'he sleeve 55 inciudes aA bead 55' which nts in an annular groove l in'the core catcher assembly. The rubber sleeve protects the core from injury due to heat developed by friction while the core is being taken. The lower end of the inner barrel 44 ilts in a .rabbet 56 in the wall of the core catcher as- 1s sembly. The intendidiemeter of the cere-eatener assembly is apprqnmately the same as that of the core which is cut by the bit. while the interior diameter of. the inner barrel 44 is greater than that of the core. As a result there is but 20 very little friction between the core and the core barrel and this amount of friction is conned to the portion adjacent the core catcher assembly 46. Siiice the portion above the core catcher assembly is of greater die-meter. the cere moves 26 free in this portion. This prevents destruction or damage of the core.

In operation my core barrel is secured to the end of the drill string and the normal circulation passcs down the d'rill string and through 30 the space 26 between the buter core barrel and the interior of the shell and passes through the apertures 20 thence to the hole. Some Gf the circulation iiuid will pass with the core into the inner barrel 44 and the cid in this barrel rises 85 until it passes through the apertures 42 thence it passes downwardly through the space 45 between the inner and outer barrel and out through the apertures 22. 'Ihe main circulation. of come. is through the apertures 20 and the cur- 4o rent of iluid moving through apertures 20 createa an injector eect thus maintaining the discharge opening from the end of the apertures 22 unobstructed and toa slight extent drawing the huid through the apertures 22.

45 After the desired length of core has been se# cured the core barrel is withdrawn froih the well and removed from the drill string. The bit is then removed and following this the core catcher assembly '48, which has a tight sliding nt with 50 the inner barrel. .is withdrawn and the core removed.

In assembly the parts are positioned as sho'ivn in Fig. l 4with the cap 3l removed. 'I'he stem 29 is then turned until the collar 52 engages the 55 shoulder at the lower end of the bit. After this the stem` 29 is slightly unscrewed until the inner barrel ro tes freely and after this the lock cap Ii is inserted.

With my invention the circulation. is main- 50 tained through the core barrel by the main huid circulating through the apertures 2li so that there is no stoppage of apertures 22. 'I'he apertures 22 are disposed at the rear oi.' the rearnerV blades I8 and this causes more or less of a swirling action g adiacentthe. apertures 22 to thus further assure that the circulation will be maintained. In addition to the apertures 2 2, I may provide apertures 51 infront of each reamer blade. These apertures 51 communicate with the space 26 but 70 not with the space 45.

With my core catcher assembly 46, I can readily remove a core and the rubber sleeve-within the core catcher assemblyprevents burning of the core. 75 From the foregdlng description it will be apopening therethro h, an outer core barrel mounted on said b` t. an .inner barrel rotatably mounted on said outer barrel, said inner barrel throughout its length being arranged within and spaced from said outer barrel, -means affording communication between the interior and the exterior of theinner barrel, means affording communication tween the interior of the outer barrel and the exterior thereof, and a core catcher aembly mounted on the inner barrel, salir core catcher assembly having an apermre therethrough which is of substantially -the same diameter as that of the bit core opening. both of said apertdres being of less size than that of the interior ofMthe inner barrel.

2. In a core barrel, a bit having a central core opening therethrough. an cuter core barrel mounted on said bit and extending thereabove,

a cap secured on the upper end of said outer core barrel, an inner barrel rotatably mounted on said cap, said inner barrel being spaced from said outer barrel. means affording communication between the interior and the exterior of .the inner barrel. means aifording communication between the interior of the outer barrel and the exterior thereofka core catcher assembly mounted on th lower end. of said innig-emi. said core catcher assembly having an a substantially equal in size to the bitopening. said aperture being of less size than the untel-leapt the inner barrel, and a rubber.sleev vulcanized in said core catching assembly.

3. In a core barrel. a bit having a central core opening therethrough. an outer core barrel mounted on said bit and extending thereabove, a cap cn said outer gore barrel, a coupling memvber supported by said cap, an anti-friction member engaging said oo upling member. a post engaging said. lami-friction member to rotatably support said post. an inner barrel secured on said post. said inner barrel being spaced from said outer barrl, means affording commlmication between the interior and the exterior of the inner barrel at the top thereof; and a core catcher assembly including a part inserted in the elower end of said inner barrell said core catcher asembly having artaperture substantially equal in size to the bitopening. said aperture being of less size than the interior of the inner barrel.

4. In a-core barrel, a bit. having a central core opening therethrough.' an .outer core barre] mounted on said bit and-extending thereabove, a cap secured on the upper end of the outer core barrel, an inner barrel rotatably moimted on said cap, said inner barrel being spaced from said outer barrel. means aifording communication between the interior and the exterior of the inner barrel, iiieans aording'ccmmunication between the interior of the outer barrel and the exterior thereof, a core catcher assembly mounted on the inner barrel, said core catcher assembly having -an aperture therethrough which is of substantially the same diameter as that of the'bit core opening. said aperture being of less size than that ofthe interior of the inner barrel and a rubber sleeve in said core catcher assembly.

' 5. In a core barrel, a bit having a central core opening therethrough, an outerl core barrel mounted on said bit and extending thereabove. a cap secured on the upper end of said outer core and the exterior oi the inner barrel at'the-top' thereof, a core catcher assembly including-aV part. l inserted in the lower end of said inner barreLvsaid core catcher assembly having an aperture sub..

st antially equal in size to the. bit opening. Said aperture b'eing oi less size than the-interior of inner barrel. a plurality ot spring pressed dogs-in said ogre catcher assembly, a plurality or spring iingers in said core'catcher assembly and a rubber sleeve vulcanized in said core catcherassembly. A

c. 1n s ooge barrel, afbit having a central ooe opening therethrough; an outer core mounted on said blt and 'extending-thereabovei 'an inner barrel rotatably'mountedon said outer barrel. said inner barrel being spaged iromsaid outer barrel. means aiiording communication be- V tweenthe interiorandtheexterior of the inner' barrel. said bit havinga plurality of reamer blades thereon-said bit also having a plurality oi apertures wardly therethrough.A said apertures being disposedadiacenttotherear ofsaidreamerblades and comnnmicating with the'space surroundingthe outer barrel.- saxi bit having a second plurality of apertures therein1 said second plurality of apertures intersecting 'said nrst -apertures and 85 being disposedadiaqent the lower end ot. the bit and aiiording communication between the space betweensaid inn'er and outer barrels and the exu '1. In s eore barrel. anu having 5.' central open- 40 ing 'therethrougina shell on which said' bit is 'sup-- ported. an outer core barrel thfreadedlymoimted securedon theupperendoi saidoutercorebarrel, said cap .having threaded apertures in ',its end 4.5 yall, a stem having-threads' thereon and fitting said-cap aperture, a lock cap engagingsaid stem and'said cap. said 'stem-having adependmg'skirt thereon. a threadedly engagsald skirt, an anti-friction membere'ngaging j .so said coupling membea'a -post through said. anti-friction member and having a nut member thereon engaging Said anti-friction member to rotatably support said post, said post having a depending skirt thereon. an inner barrel-`se cured to said depending skirt, said.l inner barrel being spaced from said outer barrel, said skirtv having a plurality, of radial' apertures aitording communication "between the-interior and the exterior oi the the lower poroo tion of said inner barrel being o'f reduced diameter.a core catcher; assembly including 'a paft inserted in said portion of reduced'diameter, said core catcher assembly having core engaging means .8.- In a core banel, a bithaving a central core opening therethrough. an outer core barrel mounted on said.

inner barrel rotatably mounted onthe outer barrel, said inner barrel being spaced from said outer 7o brrel. means aiiording communication. between the interior and the exterior of the inner barrel,

a core catcherassembly ncluding'a part'inserted -in'said inner barrel. said core catcher assembly having a'core .aperture therein, said inner barrel being oi less internal diameter than said bit core therein and extending downwardly and outto said depending skirtysgiid bit and extending thereabove. ari

opening, ma nt having s plurality of mmablades thereon, said'bit also having a plurality of apertures therein and extending downwardly andoutwardly therethrough, said apertures being disposed adjacent to the rear oi said reamerblades and communicating withthe space surrounding the guter barrel, said bit having a second plurality oi' apertures ein, said second plurality bt apertures intersecting said ilrst apertures and being disposed adjacent the lower 5nd of the bit and aiiordirg communication between the space between said er and'outer barrels and the ein:-v

serior of the b' t. A 9. In a core barrel,a bit'having a central core opening therethrqugh. 'an outer core barrel mountedon sind bis and yextending tnereabove,

acapsecuredontheupperendoisaidoutercore .n

barrel, a 'coupling member' adiltstably supported by .said cap. an-antiiricti on member engaging said coupling member. a post engaging said antifriction member to rotatably support said post, an inner barrel on said post. said inner barrel being spaced rom said outer means aiiording commimication between e interior and the exterior of the inner barrel at'the top thereof. a' core catcher assembly including a" part inserted in said inner barrel. said core catcher assembly having a plurality of spring pressed dogs therein. a plurality or spring iingerspn said core catcher assembly and arubbersleeve in said core catcher assembly, said .score -catcher assembly having score-aperture therein, said inner' barrel being of less internal diameter than said bit core openingfsaid bit hfvins a pluralityoi reamer blades ihereonrsaid blt also having a 'plurality and outwardly therethrough. said apertures being o! apertures therein and extending'hdownwardly -disposed adjacent to the rearor saidreamer blades and commimicating with the space sur rounding Ythe outer-barrel. said bit having a sec: ond plurality oi apertura therein. said second .pluralityoi apertures intersecting said nrstmaper- -.tures and beingdisposed adiacentthe lower 'end .'of the bit and aiiording communication between the space between said linner and outer barrels' "secured on -the upper end of said outer'core barrel, said cap having threaded apertures in its end wall,- a stem having threads thereonand ilttin saidv cap aperturi a lockeap engaging said ste and said cap, aai

stem having s depending skirt thereon. a coupling member threadedly engaging said skirt. an antiQfriction member engaging said 'coupling member. a post passing through said anti-friction member and 'having a-nut member thereon englng said anti-friction member to rotatably @Port saidpost. Seid Sthavlng a de pending akiit"thereon', an inner barrelsecured inner barrel being -spaced from said outer barre. said 'skirt having a plurality oi radial apertures therein affording communication between the interior 'and the exterlor oi the inner barrel, a core catcher assembly including a part inserted in said inner barrel. said core catcher assembly having core engaging means therein. said bit having a plurality; of aperturesl therein and extengling downwardly therethrough, and communicating -with the'space surrounding the outerbarreL'sa d bit having asecond pm.

rality of apertures' ereimsaid second plurality 0f apeltlllealbeing disposed thenlowgr indo: me bn and communicating s: thenouter end with the outlet from said iirst menfioned apertures and communicating at the inner ends with the space between said inner and outer barreis.

1l. In a core barrel, a bit having a central peiling therewroush.a sneu on which said bit is supported. an outer core barrel threadedly mounted on :saidA bit and extending'thereabove, a cap secured on the upper end oi' said outer core barrel. said cap having threaded apertures in its end wall. a stem having threads'thereon and iitbarrel being spaced from said outer barrel, saidl skirt having a plurality of radial apertures therein aiording communication between the interior and the exterior oi the inner barrel, a. core catch er assembly including a part 'inserted in said inner barrel. said core catcher assemblyshaving a plurality of spring pressed dogs thegein, a plurality oi spring ngers on said core catcher assembly and a rubber sleeve in said core catcher assembly. said bit having a plurality of mamar.

blades thereon. said -bit having -a pluralityoi apertures therein and extending downwardly therethrough, said aperturesx being disposed in the rear oi said reamer blades and communicai; lng with the space surrounding the outer barrel. said bit having a second plurality ot apertures therein. said second plurality of hpertxn-es being 5,

disposed adjacent the lower end of the bit andv communicating at their outer end with the outlet from said iirst mentioned apertures and communicating at the inner ends with the space between said inner and outer barrels. '1'0 12..In a core barrel. a bit having a shell ae- -Zeured thereto. a core barrel mounted on said bit and spaced from said shell, said core barrel having a cap thereon. an inner core barrel rotatably mounted on said cap and adjustable therealong. 15

said inner core barrel including a core catcher assembly, means to provide gircuiation between th core barrels and other means to provide circ ation between the exterior oi the outer core barrel and the shell.

13. In al core barrel. a blt having an outer core barrel mounted thereon. closure means for the end of said outer core barrel which is remote tromthe bit, an inner core barrel within said outer core barrel. means to rotatably support said its inner core barrel on said closure. means disposed between said closure and said bit to ailord communication between the interior ot said inner core barrel and the space between said inner core barrel and monter core barrel. said bu; mf?- ing an aperture therein leading from -the outer surface thereof to the space between said inner and outer core barrels.

GUY C'. OLIVER.

l Disclaimer A 2,073,87siqw a: oliva, Glendale, Calif. cons Bmw.; Parent dated M ar. 16,A

Disclaimer lod Dec.

2?-, 1948, by the inventor au'l the ussignccs,

Jack E. Talbot and Robert Farley Hereby enter this disclaimer to claim 13 in said specification.

[Qoil Gazette Februar-u 8, 1949.]

indo: me bn and communicating s: thenouter end with the outlet from said iirst menfioned apertures and communicating at the inner ends with the space between said inner and outer barreis.

1l. In a core barrel, a bit having a central peiling therewroush.a sneu on which said bit is supported. an outer core barrel threadedly mounted on :saidA bit and extending'thereabove, a cap secured on the upper end oi' said outer core barrel. said cap having threaded apertures in its end wall. a stem having threads'thereon and iitbarrel being spaced from said outer barrel, saidl skirt having a plurality of radial apertures therein aiording communication between the interior and the exterior oi the inner barrel, a. core catch er assembly including a part 'inserted in said inner barrel. said core catcher assemblyshaving a plurality of spring pressed dogs thegein, a plurality oi spring ngers on said core catcher assembly and a rubber sleeve in said core catcher assembly. said bit having a plurality of mamar.

blades thereon. said -bit having -a pluralityoi apertures therein and extending downwardly therethrough, said aperturesx being disposed in the rear oi said reamer blades and communicai; lng with the space surrounding the outer barrel. said bit having a second plurality ot apertures therein. said second plurality of hpertxn-es being 5,

disposed adjacent the lower end of the bit andv communicating at their outer end with the outlet from said iirst mentioned apertures and communicating at the inner ends with the space between said inner and outer barrels. '1'0 12..In a core barrel. a bit having a shell ae- -Zeured thereto. a core barrel mounted on said bit and spaced from said shell, said core barrel having a cap thereon. an inner core barrel rotatably mounted on said cap and adjustable therealong. 15

said inner core barrel including a core catcher assembly, means to provide gircuiation between th core barrels and other means to provide circ ation between the exterior oi the outer core barrel and the shell.

13. In al core barrel. a blt having an outer core barrel mounted thereon. closure means for the end of said outer core barrel which is remote tromthe bit, an inner core barrel within said outer core barrel. means to rotatably support said its inner core barrel on said closure. means disposed between said closure and said bit to ailord communication between the interior ot said inner core barrel and the space between said inner core barrel and monter core barrel. said bu; mf?- ing an aperture therein leading from -the outer surface thereof to the space between said inner and outer core barrels.

GUY C'. OLIVER.

l Disclaimer A 2,073,87siqw a: oliva, Glendale, Calif. cons Bmw.; Parent dated M ar. 16,A

Disclaimer lod Dec.

2?-, 1948, by the inventor au'l the ussignccs,

Jack E. Talbot and Robert Farley Hereby enter this disclaimer to claim 13 in said specification.

[Qoil Gazette Februar-u 8, 1949.]

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