US1797632A - Automatic pipe puller - Google Patents

Description

24, 1931. R. D. BRANNON 1,797,632.

AUTOMATIC PIPE FULLER Filed June 25, 1930 2'Sheets-Sheet 1 March 1931- R. D. BRANNON 1,797,632

' AUTOMATIC PIPE FULLER Filed June 25, 1950 2 Shegts-Sheet 2 l \g Q Patented Mar. 24, 1931 UNITED STATES- ROBERT D. IBRANNON, F SULPHUR, LOUISIANA AUTOMATIC rirn PULLER Application fi1e g1 .Tune 23,

This invention relates to a device designed for pulling or removing pipe sections which have become wedged in well bores, the primary object of the invention being to provide a device of this character which may be readily and easily positioned and removed.

An important object of the invention is to provide a device of this character which may be contracted, means being provided for expanding the body portion of the device into close engagement with the pipe to be removed, to securely grip the pipe under operation.

Another object of the invention is to pro- 1 Vide means for releasing the grip on the pipe under operation, by directing a downward pressure on the mandrel, eliminating the necessity of rotating the mandrel to release it, thereby providing a quick acting tool.

lVith the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings:

Figure l is a side elevational view of a pipe pulling tool constructed in accordance with the invention.

Figure 2 is an elevational view of the mandrel, forming a part of the tool.

Figure 3 is a longitudinal sectional view through the tool.

Figure 4 is a sectional view taken on line H of Figure 3.

Figure 5 is a sectional view taken on line 5-5 of Figure 3.

Figure 6 is a sectional view taken on line 6-6 of Figure 3.

Figure 7 is an elevational view illustrating the inner side of one of the ratchet memers.

Figure 8 is an elevational view illustrating the outer surface of one of the ratchet mem- 5 bers.

1930. S eria1No. 463,1 58.

Referring to the drawings in detail, the reference character 5 designates the mandrel of the tool, which is formed with cut out portions 6, disposed in the periphery thereof, the out out portions having inclined surfaces 7, against which the springs 8 of the ratchet members 9 engage.

These ratchet members 9 are mounted within the cut out portions 6, and are formed with teeth that cooperate with the teeth 10 of the sleeve or body portion 11, through which the mandrel 5 extends Longitudinal slots '12 are formed in the sleeve 11 and extend from the lower end of the sleeve, to points substantially intermediate the ends of the sleeve or body portion 11, thereby providing an expansible section. Teeth 13 are formed exteriorly of the sleeve. and extend upwardly so that an upward pull on the sleeve will causethe teeth to bite into the pipe section being pulled, the pipe section in the present drawings being indicated by the reference'character 14.

As clearly shown by Figure 3 of the drawings, the inner surface of the body portion or sleeve 11, is inclined to cooperate with the inclined or tapered outer surface of the expanding member 15 that is shown as positioned on the mandrel 5, at the lower end thereof. The lower extremity of the man drel is threaded to receive the tapered head 16 which contacts with the lower end of the expanding member 15 to hold the expanding member on the mandrel 5.

In the use of the device, the tool is dropped into the pipe to be pulled, whereupon the mandrel is rotated in a clockwise direction, causing'the mandrel to move upwardly into the sleeve or body portion 11-.

With the upward movement of the mandrel, the expanding member 15 is moved over theinclined inner surfaces of the expansible section of the sleeve or body portion 11, moving the 'expansible section to expand the same, causing the teeth 13 thereof to move outwardly into engagement with the pipe being pulled.

Should it be desired to increase the grip on the pipe section being removed, the mandrel is rotated further in a clockwise direction to increase the pressure against the expansible section.

To release the tool, it is only necessary to force the mandrel downwardly, whereupon the ratchet members slide over the teeth or threads 10, and the expanding member 15 moves out of contact with the expansible section of the sleeve, allowing the expansible section to contract and disengage the pipe being removed.

Due to this construction it will be obvious that the tool may be readily and easily released from the pipe Without the necessity of rotating the mandrel in an anti-clockwise direction.

' Iclaim: I r

1. A pipe pulling tool comprising a mandrel, a sleevethrough which the mandrel extends, an expansible section forming a part of the sleeve, an expanding member on the mandrel and engaging the expansible section to expand the expansible section into engagement with a pipe to be removed, said mandrel having cut out portions formed with inclined inner surfaces, ratchet members mounted Within the out out portions, threads formed within the sleeve and engaged by the ratchet members to move the mandrel longitudinally of the sleeve when the mandrel is rotated, said mandrel and ratchet members adapted to slide longitudinally of the sleeve independently of the threads of the sleeve, and means for urging the ratchet members laterally. r

2. A pipe pulling tool comprising a mandrel, a sleeve having an expansible section, an expanding member on the mandrel and contacting with the expansible section to move the expansible section into engagement with a pipe to be removed, ratchet members carried by the mandrel and engaging the sleeve to move the mandrel longitudinally of the sleeve when the mandrel is rotated, and

said ratchets adapted to move over the sleeve when the mandrel is forced downwardly through the sleeve.

3. A pipe pulling tool comprising a mandrel,-asleeve in which the mandrel is positioned, an expanding member on the mandrel for moving the sleeve laterally to engage a pipe in which the sleeve is positioned, spring pressed ratchets on the mandrel, said sleeve having internal teeth engaged by the ratche'ts to feed the mandrel through the sleeve when the mandrel is rotated, and said ratchets permittingthe mandrel to slide longitudinally through the sleeve to release the sleeve.

In testimony that I claim the foregoing as my own, I have hereto ailixed my signature.

ROBERT D. BRANNON.

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