US2197062A - Orienting core barrel - Google Patents

Description

2 Sheets-Sheet 1 IA/vE/vTaRs. C. H. SWEET. L. S. iHH/11155115.

Apnl 16, 1940.v

C. H. SWEET ET AL ORIENTING CORE BARREL Fil'ed June 1l, 1937 April 16, 1940. c. H. swEl-:T E-r A1. y 2,197,062

ORIENTINGv CORE BARREL Filed June 11,-1937 2 sheets-sheet 2 '2% 4 IH l 14V?? "nu nl".

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l A Y gfx/vigna /7 7' TOR/VE] Patented'Apr. 16, 1940 Y y a UNITED sTATEsPATENT OFFICE ORIENTING CORE BARREL Cecil Howard Sweet, Huntington Park, and

Lawrence Shiner Chambers, Los Angeles, Calif.

Application June 11, 1937, Serial No. 147,704

Claims. (Cl. Z55-J2) This invention relates to an orienting core catcher or fingers 3.l A plug 4 is mounted in the barrel. The prime object of which is to enable head 2 and this plug is provided with an annuthe operator to determine the strike or direction lar shoulder 5 at the upper end, to be engaged of the formation from which the core is taken. by the lingers 3. The plug is held in position 5 An object of our invention is to provide al at the core head 2 by lmeans of a plurality of 5 novel orienting core barrel in which a mark on shear pins 6. Acore marking pin I extends into the formation is aligned with a survey instrument a bore 8 in the bottom of the plug 4. The pin is in such a manner that the picture taken by the held in position by a, shear pin 9 and a coil survey instrument will impart knowledge to the spring I0 bears against the top of the pin for 10 operator, relative to the strike or direction of the the purpose of urging the pin outwardly as will l0 formation, be further described; The pin 'l has a peculiar Still another object is to provide a novel orientshape or conformation, for example, it might be ing core barrel of the character stated in which fiat on one side. A second coil spring II enthe survey instrument is always positioned in a circles the pin 'l and extends slightly below the l5 known relation to a marker arranged at the tip of this pin. When the core barrel is dropped l5 lower end of the core barrel. v or spudded in the formation, the pin 9 is rst Stillv another object is to provide a core barrel sheared, whereupon thespring I0 presses the pin of the character stated in which a survey indownwardly so that it remains vin the formastrument is lowered into the barrel, after the tion. The spring II iscompressed. vThe pins Ii barrel has been run into a well, thereafter takare sheared oif as additional weight is exerted, 20 ing a picture with the survey instrument, said and when these pins shear,` the recoil of the spring picture giving'information relative tothe strike II will throw the plug 4 upwardly into the core or direction of the formation. Thereafter raisbarrel I, thus leaving thebarrel free to receive ing the survey instrument to the surface and the core as the barrelis subsequently rotated to then continuing the coring operation with the recover asample of the formation. To the upper 25 core barrel. end of the barrel I, weattach a pipe section I2 A feature of our invention resides in the ability and the drill pipe is attached to the' upper end touse a standard core barrel and to arrange in of the pipe I2 by the usual joint or coupling I3. 4 that barrel a punching block and super-impos- A non-magnetic sleeve I4 is xedly secured Withing on the barrel, a receiver for the survey inin the pipe section I2. A means of securing the 30 strument and thus orient the core which is resleeve might be anannular nut I5 which screwsV covered in the standard or usual core barrel. into the pipe and against aA shoulder I6 on lthe Other objects, advantages and features of insleeve. The sleeve is provided with a longitudivention` may appear from the accompanying nal slot or groove I1 'and the upper end is tapered drawings, the subjoineddetailed description and as 4shown at I8 forthewpurpose of?A guiding the 35 the appended claims. a survey instrument as'will be further'described.

In the drawings-y f I 1 A survey instrument I9; preferably of any well Figure 1 is a diagrammaticA longitudinalsecknown single shot.ty`pe,i`s lowered into the tional viewv of our orientingv core barrel. drill pipe von a cab1e`g20.l yAug orroller' 2l pro- 40 Figure 2 is a fragmentary longitudinal sectional .jects from lthe shellof thsurvey'in'strument and 40 view of the upper portion ofthe core barrel. as the instrument"` is lowered into thefts/ell,r this Figure 3 is ra fragmentary longitudinal sec- ,roller engages thetapered surface `Iil'and is gu'id-ftional view of the lower part ofthe core barrel. ed into the' i slot I1'. This slot"-l lt'lfl isy arrangedv Figure -4 `is a longitudinal sectional View of the in a fixed'and known-position,` relative' tothe pin y 45 non-magnetic sleeve showing the survey instru- 1. For example, the/slot can be aligned with the 45 ment in side elevation. flat side of the pin. When vthe suri'reyinstrumentY Figure 5 is a fragmentary longitudinal sectional is in position, aslshown in Figure 2, it will vthen view of the lower part of a punch core barrel. be in a known position relative" to.` vv'the pin'` 1.'

Figure 6 is a, fragmentary longitudinal sectional The Survey instrument IIS -COIIGaS "2Q COm'pass' `j view of still another type-of punch core barrel. which is photographed Aasthevinstrument comesf 50 Referring more particularly to the drawings, to rest within our oorewbarrel. The compass; p the numeral I indicates .a-core barrel of usual as well as the photographic mechanism,l is not and well known construction. The core barrel Shown Since it iS usualand Well'kIlOWni The P- carries the usual core header -cutter 2. Within eration of the barrelzpreviously described is as the core head, there is provided the usual core follows: a 55 i The barrel is lowered into the well on the drill pipe in the usual and well known manner. When bottom is reached, the barrel is raised above the bottom of the hole, a distance of several feet6 'I'he tool is allowed to remain in this position until the timing mechanism of the survey instrument has operated and a picture is taken of the compass. The survey instrument is then withdrawn from the hole and the coring operation continues in the usual and well known manner. After the core has been taken, it is raised to the surface. The pin l either remains in the top of the core or the peculiar imprint of the pin will be evident in the top of the core. From the developed picture in the survey instrument, which can be aligned with the roller 2| simply by marking the survey instrument in the usual and well known manner, it is possible to place the core and the picture from the survey instrument in exactly the position they occupied when the core barrel was rst spudded down. Thus, the exact strike or position geographically that it occupied in its natural state, will be shown, thereby permitting the operator to observe carefully and accurately the angle of inclination and the magnetic bearing of the axis or plane'of the formation.

It is obvious that the survey instrument may also include an inclinometer for the purpose of determining the inclination at the bottom of the hole, so that the core can be straightened when on the surface to accurately conform to its positiony when in its natural state.

In Figures 5 and 6, we have illustrated a punch core type of barrel in which a sub 22 is attached to the lower end of the pipe section l2. punch core barrel 23 is secured to the lower end of the sub 22. The sub isy provided with a central uid passage 24 and with iluid outlets 2,5 at the lower end. The barrel 23 is provided with a marker 26, either on the inside or outside of the barrel and preferably the outside as shown. marker may, consist of a Single rib or the like and this rib is aligned or arranged in a. knownv position relative to the .Slot .Il in the non-magnetic sleeve [4. Relief ports 2,1 are provided at the upper' end ot the. barrel 23.

In 6 the punch core barrel 2.8 is at: tached to the plug- 2,9 which ts into the lower Aoud of the usualoore barrel. '111e plus, 2Q. is' held in. position br the baile@ whieh normally.. 4reati iu ndenta'oious. in the wall o1? the core barrel ehoe al. einer the cere, taken in the barrel ze..

rotation ofv the 'shoe a|..w'i.11jreuac.tthe. balls 3io and. thereafterthe nlug y2o and` the barrel man Slide upwardly .into the.' stadard oore barrel. above tbeehoo. 3|, s o'that a regular core eau be taker1 after. the runen .oo're Sample has.. heee reoovered-, '111e barrel 2.6.1 ie. provided with relief.. ports 3.2; at the. upper. ejud. thereof. so thatv a. full ore can. be taken th ein.

1.a operation. the fool. lowered into me. wen.,

together'. with the'. survex? ioetuimeao I9- @he tool is So.. ed down. aafla Puueh ooreis tatoutlie, too1is. in this IDoeitio.11,. the time. meohf aaien.; iu the Survey instrument. takes. 'its pile ure.

The 'entire tool.. is thou `rotu`rued to the Surface and the. Sample recovered in the punch coreba'rrel and arranged in known relation to each plus. compressed by other and thus the strike or axis of the cored formation can be determined.

When a standard core barrel is then run into the hole and the rregular corevtaken, the mark made by the punch core barrel will be apparent 5 in the core and again the regular core can be compared with the picture of the survey instrument to determine its strike.

In the modication shown in Figure @theA punch core is rst taken and the regular core is next taken without having to remove the instrument from the well'. 'Ihe method of aligning the punch core with the survey instrument is the same as previously described.

Having described our invention, we claim:

1. In an orienting corel barrel, a pipe section at the upper end of the core'barrel adapted to receive a survey instrument lowered from the surface on a line, aligning means in the pipe section engageable by the survey instrument where- 20 by the survey instrument is positioned in a known c position in the core barrel and core marking means on the core barrel and means releasably holding the core marking means inthe lower end of the core barrel, said core marking means being adapted and arranged to move upwardly into the core barrel when released, and a spring on the lower end of the core marking means compressed by contact with the top of the uncut core to cause said upward movement of the core markingmeans in a sudden manner when the -releasable means is released.

2. In an orienting core barrel, a pipe section arranged at the upper end of the core barrel, said pipe section beingr adapted and arranged to receive a survey instrument lowered from the surface on a line, mounting means in the pipe section to receive the survey instrument and core marking means on the lower end of the core barrel, aligning means in the pipe section engageable by the. Survey flu. .1r\u1,1e1.1t.wherebyA the' by oontaetwuh. the fori ofthe Said upward. ,movement 'of means in ar sudden manner when the` reeas means` is. fel

receiving r'har el. upper endo; thev ba yto thi? P1115 an@ A plus, said. release including. Shear ripe. iuto. the Plug; aud SP Surface on. aline. alig.. t. v section venegagealirle by the survey i whereby the survey instument isv positioned-in known position in the core barrel, a plug re leasably mounted in the lower end o1' ,the core barrel, said plug projecting below the core barrel, core marking means carried by the plug and shear pins extending into the plug, said pins, when sheared, releasing the plug Afor upward movement into the core barrel, and a spring on the lower end of the plug compressed by contact with the top of the uncut core to' cause said upward movement of the plug in a sudden manner when said pins shear.

5. In an orientlng core barrel, a plug mounted in the lower end of the core barrel, said plug extending below the core barrel, shear pins extending finto the plug, said pins, when sheared, permitting upward movement of the plug into the core barrel, and a. spring on the lower end o f the plug compressed by contact with the top of the uncut coreto cause said upward movement of the plug in a sudden manner when said pins shear n CECIL HOWARD SWEET.

LAWRENCE SHINER. CHAMBERS.

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