US1342870A - Pipe-puller - Google Patents

Description

s. Roman/aux AND 0. PAGGI.

PIPE FULLER. A'PPLICATION FlLED MAR. 15, 1919.

Patented June 8, 1920.

2 SHEETS-SHEET I- Fgl f WITNESSES d R Obie M m W A TTORNEYS INVENTOR s. ROBICHAUX AND 0. PAGGI.

PIPE lULLER. Ll ATION FILED MAR.

1,342,870. I PatentedJune8, 1920. 2 SNEETHIIIT 1- WI TNESSES Siam" I TIURNEYS UNITED STATES S OSTHENE ROBICI-IAUX AND CHARLES PAGGI, OF SARATOGA, TEXAS.

PIPE-FULLER.

Specification of Letters Patent.

Patented June 8, 1920.

Application filed March 15, 1919. Serial No. 282,840.

To all whom it may concern:

Be it known that we, SOSTHENE ROBI- CHAUX and CHARLns Pacer, citizens of the United States, and residents of Saratoga, in the county of Hardin and State of Texas, have made certain new and useful Improvements in Pipe-Pullers, of which the following is a specification.

Our invention is an improvement in pipe pullers, and has for its object to provide mechanism for use in connection with pulling mechanism for pipe casings of wells of the character shown and described in our prior Patent No. 1,280,850, Oct. 8, 1918, and adapted to be used in connection with the said mechanism for gripping the pipe and threading or cutting the same as it is pulled.

In the drawings Figure l is a top plan view of the improved cutter and threader;

Fig. 2 is a perspective view of one of the gripping-sections or slips;

Fig. 3 is a similar view of one of the die holding sections;

Fig. 4: is a perspective view of the other section;

Fig. 5 is a vertical section through the mechanism for operating the cutter and threader;

Fig. 6 is a perspective view of another form of threading section;

Fig. 7 is a similar view of a form of cutting section;

Fig. 8 is a perspective view of the mounting for the gear wheel, and,

Fig. 9 is a similar view of the gear wheel and its connection.

In the present embodiment of the invention a frame is provided consisting of longitudinally extending bars 1 connected at one end by a yoke 2, and at the other by cross plates 3, and each of these longitudinal bars 1 is provided on its inner face with a groove forming a guide 4. extending longitudinally of the frame. A sectional die holder is arranged within the frame, the said holder consisting of a section 5 having an opening 6 at one end within which is arranged the section 7. The end of the section adjacent to the opening 6 has a threaded opening 8 through which passes a threaded stem 9 in the adjacent end of the section 7.

A sleeve 10 is threaded through the opening 8 the said sleeve being externally threaded to engage the opening and being internally threaded to engage the stem 9 and the outer end of this sleeve which is plain is passed through a central opening in the yoke. Outside of the yoke the sleeve has a head 11, provided with radial pins 12 or the like for turning the sleeve. The thread of the stem 9 and the external thread of the sleeve 10 are opposite, so that when the sleeve is turned in one direction, the section 5 will be drawn toward the yoke and the section 7 will be moved away from the yoke, while when the sleeve is turned in the opposite direction the sections 5 and 7 will be moved away from each other. Each sec tion 5 and 7 is recessed at its inner face, as indicated at 12 to receive slips for gripping the pipe or to receive dies for cutting or threading the pipe.

The recesses 12 taper from above down ward, and the outer faces of the die sections, one of which is indicated in Fig. 2, are shaped to fit these tapering surfaces. Each die section 13 is arc-shaped, the inner face being in the case of the slips, corrugated transversely to afford a firm grip on the pipe, and the die sections 13 have extensions 14 which are adapted to engage recesses 15 in the holder sections. Each of these recess axes is perpendicular to the plane of the holder section, is substantially circular in cross section and is connected to the die section by a web. Because of the configuration of the die section, the web is of greater width at the bottom than at the top of the section, and it will be evident that when the extensions 14: are engaged with the recesses 15, the die sections will be firmly held in the holder section.

When the slips shown in Fig. 2 are used there are two slips for each holder section. When threading dies .are used, each die 16 which is substantially semi-circular, has thread cutting ribs 17 on its inner concave face, and has extensions 18 on its convex face for engaging the recesses 15. Thus with threading dies each holding section supports a die, while with the gripping dies each holding section supports two dies.

The cutting die sections 19 shown in Fig. 7 are also arc-shaped, being approximately semi-circular, and have extensions 20 corresponding to extensions 18 of Fig. 6. These die sections have transverse openings 21, in which are journaled cutting wheels 22 of usual construction, the said wheels extending beyond the concave face of the die to engage the pipe 23 to be cut.

end of the hub.

In pulling the pipe the frame 1-23 is placed about the pipe in a manner shown in Fig. 1', with the pipe passing up between the holder sections, said sections being moved apart to permit the passage of the pipe. The pipe is pulled now until the joint is above the frame 1-23 after which the sleeve 10 is turned until the slips 13 grip the pipe, the turning of the sleeve moving the holder sections toward each other. With the pipe now gripped the pulling mechanism may be released, after which the mechanism shown in Figs. 5-8 and 9 is brought into play to unthread the topmost joint. This mechanism has a beveled gear ring 24: arranged above the frame 1-2-3 and coaxial with the center of the opening between the holder sections. The ring 24 has bevel gear teeth on its lower face and these teeth mesh with the teeth 25 on the bevel gear on a driving shaft 26, which is journaled in sectional bearings in the plates 3. V

The ring is mounted on a hub 2. the underface of the ring having a rabbet 28 coaxial with the ring for receiving the upper The hub is annularly grooved as indicated at 29, near its top, and dowel pins 30 extend through the hub of the gearing, and engage the groove, the dowel pins being held by pins or set screws, as shown. Thus the ring 24- is rotatably connected with the hub and the hub is secured to the frame 123 in any suitable manner.

Standards or posts 31 extend upward from radial arm 32, the links being adapted to engage over the free ends of the gripping jaws to lock them on the pipe.-

It will be noticed that the free end of each jaw has a notch 36 for engagement by the sired to rethread the pipe or to cut-the same the dies 16 or 19, as the case maybe, re place the slips.

A device of the characterspecified comprising a frame adapted to seat over a well casing and having an opening through which the casing may extend, means for clamping the casing to hold it from rotation and to prevent downward movement thereof, and means for engaging the sections, said means comprising a gear wheel having an opening throughwhich the casing extends and mounted to rotate on the frame, posts on the gear wheel at the opposite sides of the opening, each post carrying means for gripping the casing and the said gripping means cooperating to grip the caslng to the wheel when the wheel is turned, said clamping means comprising slips, and holder sections for the slips, one of-the sections having an opening in which the other-is movable, the sections having vertically extending undercut grooves and the slip sections having ribs fitting the grooves, the adjacent ends of the slip sections and the holder sections being inclined to :limit the downward movement of the slip sections with respect to the holder sections and to tighten the ribs in the grooves.

SOSTHENE ROBTCliAUXJ CHAS. PAGGI.

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