US1594668A - Hydraulic wall hook - Google Patents

Description

Aug. 3 1926. 1,594,668

- P. G. GATES ET AL HYDRAULIC WALL HOOK Filed Sept. 8, 1925 5 Sheets-Sheet 1' v Aug. 3, 1926. 1,594,668

P. G. GATES ET AL YDRAULIC WALL HOOK Filed p 1925 5 Sheets-Sheet 5 a x 1 ga i I 4 i i Patented Aug. 3, 1926.

STATES PAUL e. earns Ann EARL-H.

REEDER, OF LONG BEACH, MONEIA, AND ROY W. YOUNG, OF LONG BEACH,

CALIFORNIA.

HYDRAULIC WALL HOOK.

Application filed September 18, 1925. Serial Nb. 57,144.

This invention relates to improvements in tlons.

The primary object of the invention is to provide an improved form of fishing tool which is' primarily designed to recover the broken off or twisted off sections of drill pipe and the like from the bottom of the well hole. In well drilling by means of a rotary drilling outfit, it not infrequently happens that the lower end of the drillpipe breaks or twists off. If the well hole is straight there is usually but comparatively small dilfi'culty in recovering the fish which is the remaining section of drill pipe. However, in many infis ing tools employed in well drilling operastances there are cave-ins or. cavities in the the fish under sides of -the well hole, and when the drill pipe twists or breaks ofi,'it often leans against the side of the well hole and extends upwardly into the cavity. In such cases it is extremely difiicult to recover the section of drill pipe. The improved fishing tool or Wall hook is primarily designed to recover such circumstances. \Vith the foregoing and other objects in view which will be made manifest in the following detailed description'and specifically pointed out in the appended claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein Figure 1 is a side elevation, parts being broken away and shown in vertical section, through the improved fishing tool or wall hook,

Fig. 2 is a rear elevation of the improved fishing tool, parts being broken away and shown in section,

Fig. 3 is a side elevation of the tool from the opposite side from that shown in Fig. 1,

1g. 4 1s a view in elevation of the arm constituting the moving part of the tool,

Fig. 5 is a partial perspective view illustrating the form of the .hook provided on the lower'end of the arm shown in Fig. 4,

Fig. 6 isa front view in elevation of the body of the hook, parts being shown in section v Fig. 7 is a side elevation of the body shown in Fig. 6,

body,

Fig. 9 is a vertical hole, illustrating the fish therein and the trating the manner in which Fig. 8 is a vertical section through the section through a well manner in which it is first improved tool, a

F 1g. 10 1s a view slmllar engaged by the to Fig. 9, illusthe fish is handled after it is engaged,

Fig. 11 is a view through the well hole, illustrating the manner in which the tool engages the fish preparatory to lifting the fish from Within the well hole,

Fig. 12 is a section view illustratin a modified form of hook on the lower em? of the arm.

Fig. 13 is a horizontal sectiontaken on the line 13-13 of Fig. 12, and

Fig. 14 is a perspective view of the slidable slip employed in the modification shown in Fig. 12.

Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout, the improved tool consists of a. body 10, the upper portion 2 of which is cylindrical in form and which is s provided a flat face 15. A horizontal aperture 16 is formed through the body and, which is internally threaded. This aperture has its ends enlarged, as indicated at 17,

CLARENCE 1a round, or"

and is arranged adjacent the forward side 5 15. Below the aperture 16 the forward side 15 is straight but downwardlyinclined t0- Ward-the axis of the body, as indicated at 18. A bore 19 is formed longitudinally through the body 10 and has its upper end enlarged and its lower end of reduced diameter,'a-s indicated at 19, providing a valve seat 20. A horizontal bore 21 is formed in the body immediately above the valve seat 20 and provides a chamber for the ball check valve 22. Theforward or outer end of the horizontal bore 21 is enlarged, as indicated at 23, and a plunger 24 having its outer end enlarged, as at 25, is slidable within the bore 21. A groove is formed in the forward face .15 of the body, this groove being indicated at 26, and communicates with the enlarged portion 23 of the horizontal bore 21.

Adjacent the upper ends of the'parallel side faces 13 and 14 there are formed arcuate slots'27. Depending flanges or guides 28 ex-' tend downwardly from the upper cylindrical portion of the bodylO over the straight parallel sides 13 and 14. These flanges 28 are undercut to provide grooves which are arcuate in form and which are indicated at 29. An arm 30 has its upper end provided with a back wall 31 and parallel side walls 32 and 33. This arm is pivotally connected to the body 10 by means of pins or screws 34, which extend through apertures in the sides 32 and 33 and the aperture 16. The upper ends of the sides 32 and 33 are provided with offsets 35 and 36' which are receivable within the grooves 29.beneath the depending flanges 28. Pins 37 are mounted upon the upper ends of the sides 32 and 33 and have their heads slidable within the slots 27. On the face of the back Wall 31 of the arm 30, which is positioned against the front face of the body, there is formed a groove 38 which communicates with the groove or slot 26 on the forward face of the body. The arm 30 extends a considerable distance downwardly from the bottom of the body, and on its lower end there is provided a semi-circular, horizontally arranged hook 39 which may be provided with a depending finger 40. The top surface of the hook 39 provides a shoulder which is continued, as indicated at 41, around against the inner face of the arm 30. In the bottom of the body 10 there is formed an internally threaded recess 42 which receives the threaded pin of a tap 43, this tapbeing provided with a safety joint connection with the body, as indicated at 44. The tap 43 has a bore 45 forming a continuation of the reduced sec-' tion 19 of the longitudinally arranged bore 19. Across the top of the bore 19 there is driven an inclined pin 46 which limits the upward movement of the ball check valve 22 within the bore 19.

The operation of the device is as follows: In Figures 9, 10 and 11 the well hole is illustrated at W, there being a cavity C formed in one side thereof. The fish is indicated at F and consists of the broken off or twisted off section of drill pipe. This fish is shown as leaning against the sides of the well hole and having its upper end disposed within the cavity C. For purposes of illustration, the fish shown has been so broken off that a collar or tool joint T is left on its upper end. The improved tool is secured to the lower end of the drill pipe D and is lowered into the well hole, the arm 30 assuming a position hanging vertically downwardly from the body 10. Byinspecting the recovered section of threaded pipe, which was removed from thehole after the fish F was twisted off, the location of the upper end of the fish F canbe approximately determined within the well hole. The drill pipe D is lowered the required distance and during the lowering operation the fluid within .D is released and the drill the well hole passes upwardly through the bores 45, 19 and 19 into the drill tube D,

so that the pressures on the inside and on the outside of the tool will be equalized. As clearly shown. in Fig. 8, when the plunger 24 is in its innermost position, which is when the arm hangs vertically, the check valve is maintained'otf from its seat, so that the well fluid may readily pass through the bores in the body. \Vhen the drill pipe D has been lowered the required distance, so that the lower end of the arm 30'is below the upper end of the fish, pressure is applied within the drill pipe by starting up the mud or circulation pump. At first the fluid flows downwardly through the bores 19, 19 and 45, but as the pressure is increased, some pressure is developed within the end of the horizontal bore 21, forcing the lunger 24 outwardly from the body, and allowing the ball 22 to seat and thus increasing the pressure developed within the end of the bore 21. The end of the plunger engages the upper end of the backwall 31 on the arm 30, as clearly shown in Fig. 1, and when it moves outwardly, it swings the arm from the position shown in Fig. 1 to the inclined position shown in Fig. 9. The drill pipe D is then rotated and the hook 39 on the bottom of the arm sweeps around the walls of the well hole WV or adjacent to them. The semi-circular hook 39 can enter the cavity C and can engage uponthe fish F, receiving the fish within the hook. When the fish has been engaged, the pressure within the drill pipe pipe is slightly elevated, causing the tool jolnt or collar T to be engaged by the top face of the hook 39 and the shoulder 41. The arm 30 will again assume a vertical position and will lift the fish F from the bottom of the well hole, thus straightening the fish up within the well hole. The drill pipe D can then be lowered preferably rather quickly so as to cause the fish F to stickup in an approximately vertical position within the well hole. When in such osition the drill pipe can be lowered and tiie tap 43 can be caused to threadedly engage the upper end of the fish and the-fish can then be removed from the well hole. The offsets 35 and 36 together with the pins 37 assist the pins 34 in transmitting the weight of the fish F from thearm 30 to the body. construction operates The above described very satisfactorily when it so happens that the lower end of.

drill pipe breaks intermediate its ends, so that there is no shoulder on its upper end,

which may be engaged by the top of the hook 39 and the shoulder 41. In such instances instead of using the arm 30, as shown end, on one vside of which teeth 47 are,

formed. On the opposite side of the semicircular hook there is formed a groove 48 which is dove-tailed inform to receive the dove-tail 49 on a slidable slip 50., In using this arm, when the hook engages the fish, the slip 49 will slide downwardly in the inclined groove 48 and engage the cylindrical surface of the fish, tightening upon it and permitting it to be lifted so as to be set up straight and then lowered as before.

If it should so happen that the drill pipe has been partially collapsed at its upper end, so that it is diificult to cause the tap 43 to enter it, a die collar may be substituted for the tap 43 and caused to threadedly engage the upper end of the fish. The question as to whether there is a tool joint T adjacent the upper end of the fish or not can be readily determined from an inspection of the bottom end of the drill pipe, which was removed from the well after the fish was lost, so that the drill crew can ascertain whether to use the arm having the shoulder 41 or the arm having the teeth 4? and the slip 50.

The purpose of the slot 26 and the groove 38 is to allow any circulation fluid which might collect beneath the enlarged portion 25 of the plunger 24 to escape when the arm assumes its vertical position shown a the fluid within the drill in Fig. 10. Because of the fact that the plunger 24seats the ball'22 when in its innermost position, it will be readily appreciated that on lifting the fish out of the well, pipe may readily drain therefrom through the bores 19, 19 and i5.

From the above it will be appreciated that an improved form Offishing tool or wall hook is provided which has a hydraulically operated arm adapted to engage the walls of the well and sweep thereagainst so as to encounter the fish which may be leaning against the walls of the well. By the improved construction it is possible to easily and quickly recover the fish from the well whereas heretofore when the fish leaned within a cavity, such as C, great difficulty has been experienced, often requiring side tracking and sometimes an abandonment of the well hole.

It will be understood that various changes in the detail of construction may be made without departing from the spirit or scope of the invention as defined by the appended claims.

We claim:

1. A wall hook comprising a body, an arm pivotally connected to said body, said arm having a semi-circular hook formed thereon, and means including a hydraulically operated piston for swinging the arm relatively arm relatively to the body,

to the body, so that it may be caused to engage the walls of a well hole.

2. A wall hook comprising a body, an

arm pivotally connected to said body, said arm having a semi-circular hook formed thereon, means for swinging the arm relatively to the body so that it may be caused to engage the walls of a Well hole, and threaded means mounted upon said body adapted to be caused to threadedly engage a fish after the fish has been straightened up in the well hole by said arm.

3. A wall hook comprising a body, an arm pivotally connected to said body, hydraulically operated means for moving the so that it may engage the walls of a well hole, and means carried by the arm engageable upon a fish so that the fish-may be elevated thereby.

4. A wall hook comprising a body, an arm pivotally connected to said body, hydraulically operated means for moving the arm relatively to the body, engage the walls of a well hole, and means carried by the arm engageable upon a fish so that the fish may be elevated thereby, and threaded means mounted upon the body adapted to be caused to threadedly engage the fish after the fish has been straightened up by means of said arm.

5. A wall hook comprising a body, an arm pivotally connected to the body and normally hanging vertically therefrom, means so that it may carried by the arm engageable upon a fish, I

and hydraulically operated means for causing the arm to assume an inclined position with respect to the body, whereby upon rotation of the body, the arm may be caused to sweep adjacent or against the walls of the well hole.

6. A wall hook comprising a body, an arm pivotally connected to the body and normally hanging vertically therefrom, means carried by the arm engageable upon a fish, hydraulically operated means for causing the arm to assume an inclined position with respect to the body, whereby upon rotation of the body, the arm may be caused to sweep adjacent or against the walls of the well hole, and threaded means carried by the body adapted to be caused to threadedly engage the fish.

7. A fishing tool comprising a body having a longitudinal bore therein and a horizontal bore communicating therewith, a plunger slidably disposed within said horizontal bore, and a fish engaging member pivoted to said bodyand engageable by said plunger, whereby when fluid pressure is 'ap plied within said longitudinal bore, said plunger may be forced outwardly within said horizontal bore and be caused to swing said fish engaging member relatively to said body.

iao I ing a longitudinal bore therein and a horizontal bore communicating therewith, a plunger slidably disposed within said horizontal bore, and a fish engaging member pivoted to said body and engageable by said plunger, whereby when fluid pressure is applied within said longitudinal bore, said plunger may be forced outwardly within said horizontal bore and be caused to swing said fish engaging member relatively to said body, said fish engaging member having a semi-circular hook formed upon its lower end.

9. A fishing tool comprising a body having a longitudinal bore therein and a horizontal bore communicating therewith, a

I plunger slidably disposed within said horiing a bore formed longitudinally therethrough, the lower end of the bore being reduced to form a valve seat, there being a horizontal bore formed in the body s;ightly above the valve seat, a ball disposed wlthin said longitudinal bore adapted to seat upon said valve seat, a plunger slidable within said horizontal bore adapted to move outwardly therein when pressure is applied 'within the body, means limiting the inward movement of the plunger, said plunger serving to unseat the ball from its seat when in its innermost position, and an arm pivoted upon said body engageable by said plunger so as to swing in avertical plane, said arm having a horizontally arranged, semi-circular hook formed on its lower end.

11. A fishing tool comprising a body having a bore formed longitudinally therethrough, thedower end of the'bore being reduced to form'a valve seat, there being a horizontal boreformed in the body slightly above the valve seat, a ball disposed within said longitudinal bore adapted to seat upon said valve seat, a plunger slidable within said horizontal bore adapted to move outwardly therein when pressure is applied within the body, means limiting the inward movement of the plunger, said plunger serving to unseat the ball from its seat-when in its innermost position, an arm pivoted upon said body engageable by said plunger so as to swing in a vertical plane, said arm having a horizontally arranged, semi-circular hook formed on its lower end, and threaded means detachably secured to the body adapted to be caused to threadedly engage a fish.

12. A wall hook comprising a body, an arm pivotally connected to the body, and means operable by fiuid pressure to swing said arm outwardly with respect to the body so that it may engage the walls of a well hole, said arm being provided with an approximately semi-circular lateral extension adapted to be caused to engage and tolift a fish.

13. A wall hook comprising a body, an

arm pivotally connected to the body, means operable by fluid pressure to swing said arm outwardly with respect to the body so that it may engage the walls of a well hole, said arm being provided with an approximately semi-circular lateral extension adapted to be caused to engage and to lift a fish, and means carried by the body adapted to engage upon the fish after it has been straightened up in the well hole by said arm.

14. A wall hook comprising. a body, an arm pivotally connected to the bcdy, means operable by fluid pressure to swing said arm outwardly with respect to the body so that it may engage the walls of a well hole, said arm being provided with an approximately semi-circular lateral extension adapted to be caused to engage and to lift a fish, and threaded means carried by the body adapted to be threadedly connected to the fish after it has been straightened up in the well hole by said arm.

In testimony whereof we have signed our names to this specification.

'ROY W. YOUNG.

C. P. YOUNG.

EARL H. REHDER. PAUL G. GATES.

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