US434860A

US434860A - Device for removing casing-tubes in rock and earth drilling

Info

Publication number: US434860A
Authority: US
Publication date: 1890-08-19
Anticipated expiration: 1907-08-19

Description

uw Model.) 2 sheets-sheen 1n M. C. BULLOGK. DEVICE FOR REMOVING GASING TBES IN ROOK AND EARTH DRILLING.

Patentd Aug. 19, 1890.

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(No Model.) 2 Sheets-Sheet 2.

M. O. BULLOCK.

DEVICE EUR REMOVING GASING TUBES IN ROCK AND EARTH DRILLING.

No. 434,860, Patented Aug. 19, 1890..

l i I l UNITED STATES PATENT Crrrcn.

MILAN C. BULLOCK, OF CHICAGO, ILLINOIS.`

i DEVICE FOR REMOVING CASING-TUBES IN ROCK AND EARTH DRlLLlNG.

SPECFICATON forming part of Letters Patent No. 434,860, dated August 19, 1890.

Application filed August 20, 1889. Serlal No. 321,423. (No model.)

To all whom t may concern:

Be it known that I, MILAN C. BULLocK, of Chicago, in the county of Cook and. State of Illinois, have invented certain new and useful Improvements in Devices for Removing Casing-Tubes Used in Rock and Earth Drilling; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being' had to the accompanying drawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to novel devices adapted for use in connection withV rockdrilling apparatus employed for boring wells, prospecting, and similar purposes, and more particularly to an improved device by means of which the removal of a casing-tube from a bored hole may be more easilT accomplished. It often occurs in drilling a hole and after inserting therein a casing-tube that the said casing-tube must be lifted outof the hole or removed-as, for instance, when it is desired to substitute a larger casing-tube. After the hole has reached a considerable depth, the length and consequent weight of the casing-tube often become too great for its tensile strength, especially with the added resistance opposed to its withdrawal by the friction and other obstructions within the hole. In suoli cases it becomes impossible to remove said casing by drawing it out by power applied to its upper end. To overcome this objection, I have devised the construction set forth in this application, and by means of which the lower end of the casing may be supported and power applied thereto, so as to wholly or partially sustain the casing-tube and thereby enable it to be removed from the hole without danger of breakage.

The invention consists in the details of construction and combinations of parts, hereinafter fully described, and pointed out in the appended claims.

In the drawings, Figures 1, 2, and 3 illustrate in central vertical section the lower end of a casing-tube and the lower portion of my improved devices for sustaining and lifting said casing-tube, said parts being in operative position therein. Figs. 4 and 5 are horizontal sectional views taken, respectively, on the lines 4 et and 5 5 of Fig. l. Figs. 6 and 7 are horizontal sectional views taken, respectively, on the lines 6 6 and 7 7 of Fig. 2. Fig. 8 is a detail view, in side elevation and partly iu vertical section, on the line 8 8 of Fig. 4, of the devices for engaging the lower end of the casing-tube to be removed. Fig. 9 is a detail view, in side elevation, of one of the gripping-dogs. Fig. lO is a view in central vertical section, illustrating the parts shown in Fig. 2 in different positions. Fig. ll is a horizontal sectional view taken on the line ll ll of Fig. l0.

In said drawings, Aindicates a casing-tube, which is provided at its lower end with a casing-shoe a of familiar construction.

B indicates, as a whole, a grapple adapted to be passed downwardly within the casingtube and to engage the lower end thereof by means of devices forming part of the same, hereinafter described. rlhe said grapple B embraces a relatively heavy plunger B', preferably formed of steel and provided betweenv its ends with a contracted portion or spindle4 h and at opposite ends with enlargements or heads B2 B3, provided with conical surfaces h b2 adjacent to the spindle, said surfaces tapering outwardly from said spindle. The' enlargement or head B5 is rounded upon its lower or advance end, and is provided with a shoulder h3 adjacent to the conical part b2.

The plunger B is provided with a central longitudinal axial recess or passage o5, which extends from the upper end of the same to a point about opposite the upper end of the enlargement B3. b5 is a longitudinal slot formed in the contracted portion b of said plunger. A cross bar hl is passed through and is adapted to slide in said slot, said cross-bar o7 being connected with the lower end of a rod B4, located within the recess b5 and extending outwardly above or beyond the same. Attached to the ends of said cross-bar bl and surrounding the plunger B is a supporting ring or collar hs, which is provided interiorly with a series of vertical slots b9 o, which in their lower parts extend entirely through said collar hs, thereby forming fingers bw blo, Fig. 8. The said collar ha is adapted to slide upon the plunger B and is formed with a central aperture tapered outwardly at either end, whereby it may fit over or receive the inner ends of the conical enlargements before mentioned.

B5 B5 indicate a series of expansible gripping-dogs pivoted within the said slots Z2 Z29 by means of pivot-pins Z211 Z211 and extending above and below said pivots, the said pins being inserted at their ends within the iingers Z210 Z210 of the said ring or collar Z251. The rear faces of the gripping-dogs B5 B5 are so located within the collar that they will bear against the plunger B and will be expanded or contracted by reason of the contact of the said rear faces with the said conical enlargement at either end of the plunger as said dogs are brought opposite the same in their sliding movement upon the plunger. Those portions of the dogs above their pivotal points rest Within the slots in the collar 128, but in their lower portions they extend solliewhat below the ends of the iingers Z210 Z210 and are provided on their outer faces with shoulders Z212 Z212, which are adapted when expanded to pass under the lower end of the casing to be removed, as will be more fully described. The length of the gripping-dogs is such that when the collar Z2S is at the lower limit of its movement the lower end of said dogs will rest upon the shoulder Z211 of the' plunger B, so that any weight coming upon the shoulders Z212 Z212 is brought finally upon the plunger.

For convenience in construction it is preferable to form the collar Z2S in sections comprising an upper cylindric shell Z214, provided interiorly with segmental pieces Z210 Z210, Fig. 4, which are held in positionby means of two screws Z213 Z213, which secure two of said segmental pieces to the upper cylindric shell,`

and these, in connection with the pivot-pins Z211 Z211, which rest at one end in said segmental pieces, which are secured to the shell Z211 and at their opposite ends in the detached segmental pieces, hold said latter pieces in position. The cross-bar Z27, which is attached to the lower end of the actuating-rod, as above described, is secured at its extremities to the said sections, which are secured to the ring Z2111 by the screws Z213 Z213.

The upper head B2 of the plungerB is cylyndric and is provided with screw-threads, by means of which the lower end of a liftingtube C is secured thereto. Z215 Z215 are spanner-holes formed in said head B2, whereby a spanner may be engaged therewith for disconnecting the same from the lifting-tube C. The said liftingtube C extends upwardly through the hole to a point above the surface of the ground, and is there connected with a suitable machine by means of which it may be lifted out of the hole. Near the lower end of said lifting-tube is located a screw-threaded tubular coupling C, which serves to connect two sections of said lifting-tube, and is provided interiorly with a spline or feather c', Fig. 7. To the upper end of the rod B4 is secured an actuating-rod C2, said parts being connected by suitable means, which in the present instance consist of keys adapted tol enter key-seats formed on the rods Bu1 and C2 in the manner illustrated. The actuatingrod C2 extends upwardly within the liftingtube through and above the coupling C', and is of suitable size to fit closely within said coupling. Said rod is solid in its lower portion, and is there provided with a longitudinal slot or groove c2, into which projects the spline or feather c of the coupling C. Said spline c prevents said rod from turning within the coupling, but allows a relative endwise or vertical movement of said parts. The upper portion of said actuating-rod is hollow or tubular and is provided with a recess or aperture c3. A spring-actuated detent c1 is arranged upon the coupling C', and is adapted to engage said aperture c3 when the rod C2 and parts connected therewith are lifted. The said detent c4 is pivoted between its ends within a recess c5, formed in the upper end of the coupling C', and is provided on its inner face above its pivotal point with alug c6, which is adapted to .enter said aperture c3. c7 is a spring arranged to bear against the lower end of said detent to force its upper end inwardly, or into position to engage with the rod C2. In Fig. l0 Ihave'shown the several parts in the positions they will assume when said detent is in engagement with the aperture of the rod C2. In said Fig. l0' is also shown an unlocking key or plunger C3, which is adapted to fit within the tubular upper end of the lifting-rod, so that when the lug c6 of the detent c1 projects through the perforation c3, and thus locks said rod in its elevated position and the gripping-dogs in their contracted position by lowering the said unlocking key or plunger C3 within the upper end of said rod the lug will be pressed outwardly so that its rounded end onlystands in the said aperture, so that it may be disengaged from the said perforation when the actuating-rod is Vertically moved. C1 is a harpoon-sheath, within which the upper end of the said actuatingrod is secured by a screw-threaded joint, at which is formed an annular shoulder 010. Said harpoon-sheath C1 extends upwardly within the lifting-tube, and is provided near its upper end with an internal annular shoulder or flange cS-for engagement with a lifting imple- -ment or harpoon, hereinafter to be described.

The upper end portion of the actuating-rod C2 is enlarged and provided with spanner-holes cJ e9, whereby a spanner may be engaged therewith to unscrew and disconnect said parts.

The endwise or upward movement of the gripping-dogs is accomplished by means of a harpoon or lifting implement D, having expansible jaws CZ CZ, capable of being automatically locked together or in their retracted position when they are compressed.

In two pending applications for Letters Patent filedv by me JuneA 29,1889, Serial Nos. 27 8,57 l and 278,572, I have shown and deloc IIO

scribed harpoons embodying this construction, and which may be used in connection with the device herein shown.

The several parts of my invention being constructed and arranged as described, the operation and manner of using the same are as follows: The parts being in the position just described-that is to say, the gripping-dogs are retracted and held in their elevated position by the engagement of the detent c4 with the actuating-rod-the grapple is lowered into a casing-tube to be removed by means of the lifting-tube, which is connected with suitable machinery at the surface of the ground, by which said lifting-tube may be lowered and raised. The grapple is lowered until the shoulders 1112 B12 of the dogs B5 Breach a point below the lower end of the casing-shoe a. The unlocking-key G3 is then lowered within the lifting-tube and harpoon-sheath by means of a rope until it enters the tubular portion of the actuating-rod and forces the lug eG of the detent outwardly from engagement with the perforation c3, after which said key is lifted out of the tube. The disengagement of the detent from the actuating-rod allows the said rod and gripping-dogs connected therewith to fall by gravity, and as said dogs fall their lower ends will be expanded by the lower enlargement b2 of the plunger 3. This movement will bring the shoulders U2 Z212 under the casing'- v shoe a, while the lower ends of said dogs rest upon the annular shoulder b3 of the plunger. In this position'power is applied to the lifting-tube to raise the same, and also the casing A, as may be necessary, until the casing can be finally lifted out of the hole by force applied to the upper end thereof. Thereupon the casing is secured in place by any means desired and the lifting-tube lowered a sufricient distance to permit the gri pping-dogs to be raised relative to the plunger to retract them, which is accomplished as follows: Said implement is dropped through the liftingtube (by meansof a rope connected with an eye CZ on its upper end) until it enters the liarpoon-sheath and by the expansion of its jaws engages with the flange cs. As said implement is drawn upwardly the harpoonsheath will be lifted, carrying with it the actuating-rod C2, rod B2, and the dogs B5 B5, and thereby retracting the lower ends of said dogs by reason of the upper enlargement h of the plunger. It will be manifest that as the actuating-rod is lifted within the coupling c the lug c6 on the det-ent c4 pivoted therein will enter the perforation c3 in said actuating-rod Iand thus hold the dogs in their elevated position. The harpoon is then further lowered within the harpoon sheath until its jaws are compressed by contact of the annular shoulder 010, formed therein, with the upper end of the tubular portion of the actuating-rod C3, and the jaws being automatically locked together the harpoon can be drawn upwardly through the mouth of the harpoon-sheath and out of the lifting-tube.

The lifting-tube and grapple are then withdrawn, after which the casing is removed from the hole.

I claim as my inventionl. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, expansible gripping-dogs provided on their outer faces with shoulders adapted to engage the lower end of the casing to be removed, an actuating-core attached to the lower end of the lifting-tube and engaging the said dogs, and an actuating-rod connected with said gripping-dogs, substantially as described.

2. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, an actuating core or plunger attached to the lower end of said lifting-tube and having a shoulder near its lower end, eXpansible gripping-dogs engaging said core and arranged for contact with the shoulder thereof, said gripping-dogs being provided with shoulders adapted to engage the lower end of the casing-tube to be removed, and an actuatingrod connected with said gripping-dogs, substantially as described.

3. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, an actuating core or plunger attached to the lower end of the said lifting-tube and having an intermediate contracted portion with outwardly-tapering ends, a collar surrounding said core or plunger, a series of gri pping-dogs pivoted to said collar and bearing against the said core or plunger, and an actuating-rod connected with said collar, substantially as described.

4. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, an actuating core or plunger attached to the lower 'end of said lifting-tube and having a central aperture and a longitudinal slot, a sliding actuating-rod arranged within said aperture, a cross-bar located near the lower end of said rod and passing through the said slot, and a series of expansible gripping-dogs surrounding said core or plunger and connected with said cross-bar, substantially as described.

5. The herein-described apparatus for removing casing-tubes, -comprising a liftingtube, an actuating core or plunger attached to the lower end of said lifting-tube and having an intermediate contracted portion and outwardly-tapering ends, and provided with a longitudinal slot, a series of gripping-dogs adapted to engage the lower end of the casing to be removed, surrounding and bearing against said core or plunger, a longitudinallysliding collar affording pivotal support for said dogs, an actuating-rod arranged within a central aperture in said core or plunger and connected with said sliding collar through the said longitudinal slot in said plunger, and

`a detent arranged upon said lifting-tube and adapted to engage said rod when at the upward limit of its movement, whereby the dogs IOO IIO

will be held in their retracted position, substantially as described.

6. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, a core or plunger attached to the lower end of said lifting-tube, a plurality of longitudinally-movable expansible gripping-dogs engaging said plunger, an actuating-rod conend of said lifting-tube, a plurality of longitudinally-movable expansible gripping-dogs engaging said plunger, an actuating-rod connected with said gripping-dogs, said actuating-rod being provided with a tubular upper portion having a perforation therein, a harpoon-sheath connected with the said actuating-rod, by means of which said rod and dogs can be lifted, and a spring-actuated detent pivoted to the lifting-tube and. adapted to engage and pass through the said perforation when the actuating-rod is at the upward limit of its movement, said tubular part of the actuating-rod being adapted to receive a suitable tool for pressing said detent outwardly to unlock said rod, substantially as described.

8. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, a spline or feather located therein, a core or plunger attached to the lower end of said lifting-tube, a plurality of longitudinallytube and adapted to engage and pass through the said perforation when the actuating-rod is at the upward limit of its movement, said tubular part of the actuating-rod being adapted to receive a suitable tool for pressing said detent outwardly to unlock said rod, substantially as described.

9. The herein-described apparatus for removing casing-tubes, comprising a liftingtube, a coupling located therein and formed with a guide-aperture, a core or plunger attached to the lower end of said lifting-tube, a plurality of longitudinally-movable expansible gripping-dogs engaging said plunger, an actuating-rod connected with said grippingdogs and'passing upwardly through the guideaperture in said coupling, said actuating-rod being provided with a tubular upper portion having a perforation therein, and a springactuated detent pivoted to said coupling and adapted to engage and pass through the said perforation when the actuating-rod is at the upward limit of its movement, said tubular part of the actuating-rod, being adapted to receive a suitable tool for pressing said detent outwardly to unlock said rod, substan- C. CLARENCE PooLE, HARRY COBB KENNEDY.