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Publication numberUS1952652 A
Publication typeGrant
Publication dateMar 27, 1934
Filing dateNov 5, 1932
Priority dateNov 5, 1932
Publication numberUS 1952652 A, US 1952652A, US-A-1952652, US1952652 A, US1952652A
InventorsBrannon Robert D
Original AssigneeBrannon Robert D
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Well pipe cutter
US 1952652 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

March 27, 1934. R. D. BRANNON 1,952,652

WELL PIPE CUTTER Filed Nov. 5. 1932 2 Sheets-Sheet l i f 1 V Z0 1 I ,17

r j g- 3nnentor Bu l r I 4 7 Gttorncgs,

March 27; 1934. R D. BRANNON WELL PIPE CUTTER Filed Nov. 5, 1932 2 Sheets-Sheet 2 cm H.

Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE This invention relates to a tool designed for use in cutting well pipes, well tubing or the like, the primary object of the invention being toprovide a tool which may be lowered into a well and expanded to move cutters into engagement with the pipe, tubing, or liner in which the tool has been positioned, to the end that the pipe, tubing or liner may be cut into predetermined lengths and removed with facility.

An important object of the invention is to provide a tool of this character which will exert a continuous pressure on the knives of the cutter While in operation, causing the knives to cut into the pipe.

A further object of the invention is to provide a tool which may be readily removed by reversing the direction of rotation of the tool, thereby drawing the knives into and out of contact with the pipe, tube or liner under treatment.

A still further object of the invention is to provide a cutter having pipe gripping means which will securely grip the pipe, tubing or liner, holding certain sections of the tool against rotation, as the tool is being operated.

With 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 device constructed in accordance with the invention.

Figure 2 is a longitudinal sectional view through the tool.

Figure 3 is a sectional view taken on line 3-3 of Figure 2.

Figure 4 is a sectional view taken on line 4-4 of Figure 2.

Figure 5 is a sectional view taken on line 5-5 of Figure 2.

Figure 6 is a perspective view of the upper section or knife carrying section of the tool.

Referring to the drawings in detail, the device includes a body portion comprising an upper section 5 and a lower section 6, the sections being mounted on the central or supporting tube 7, which is provided so that it will not only hold the sections together, but will permit of the circulation of liquid through the tool. The upper end of the supporting tube '7 is threaded at 8, the

threaded portion being fitted in a threaded opening of the upper section 5.

The upper section 5 has its lower end formed with cut out portions 10 arranged directly opposite to each other, in which cut out portions rotary knives 11 are positioned, the knives being mounted on the movable blocks 12, that carry pins 13, depending therefrom.

Movable blocks 14 are mounted in cut out portions formed in the upper section 5 which cut out portions are arranged at right angles to the out out portions 10, the last mentioned blocks supporting knife blades 15. These blades carry pins 16 that depend therefrom, for purposes to be hereinafter more fully described.

Cooperating with the blocks 12 and 14, is a feed disk 17, that is formed with curved slots 18, in which the pins 13 and 16 operate, to the end that as the upper section 5 is rotated, the pins contacting with the edges of the slots, cause the knives 11 and blades 15, to move laterally, according to the direction of rotation of the upper section 5.

'As clearly shown by Figure 2 of the drawings, the lower section 6 is formed with an extension 19 at its upper end, the portion of the section 6 adjacent to the extension 19, being tapered as at 20, the tapered portion of the lower section 6 providing a surface against which the tapered surface 21 of the friction ring 22 engages.

This ring 22 is supplied with pins 23, that are fitted in openings in the feed disk 17, securing the ring 22 and disk together so that movement of the upper section 5 of the tool will result in the feed disk operating to accomplish the lateral movement of the knives and blades, as described.

Cut out portions 24 are formed in the sides of the lower section 6, and provide recesses or seats for the movable gripping jaws 25 which are formed with curved outer surfaces that are provided with teeth 26 constructed by providing vertical grooves, the teeth being pitched in a direction to bite into the tubing, in which the tool is positioned, when the tool is rotated in one direction.

Thus it will be seen that due to the construction of the teeth the tool may be moved vertically within the pipe being cut, with little resistance.

Openings are formed centrally of the jaws 25, and accommodate the screws 27, that hold the jaws in position on the tool. Springs 28 are fitted between the jaws and the inner surfaces of the out out portions 26, and act to normally urge the jaws laterally to contact with the tubing.

wise direction.

When the tool is lowered into well tubing, the jaws will securely grip the wall of the tubing and hold the lower section of the tool against rotation, beyond a predetermined point.

An enlarged cut out portion is formed central- IV of the lower section and provides a housing for the spring 29, which has its lower end resting on the disk 30 formed with a groove to receive the ball bearings 31, which also rest in a groove formed in the plate 32. This plate 32 is held in position by means of the nut 33 fitted on the threaded portion 34 of the supporting tube 7.

Due to this construction, the tension of the spring 29 may be regulated. The adjustment of the spring may be maintained by means of the lock nut 35, which is also positioned on the threaded portion 34 of the tube 7.

The lower end of the section 6 is capped by the section 36, which fits into the lower end of the section 6, the section 36 being formed with a threaded opening to accommodate the lower threaded extremity of the tube '7. A nut indicated at 3'7 is mounted on the tube '7 and engages the section 36, holding the section 36 in position.

It might be further stated that the openings in which the screws 2'? are positioned, are elongated, as clearly shown by Figure 1 of the drawings, thereby permitting lateral movement of the movable gripping jaws 25, to cause them to better grip or release, when the tool is rotated.

Disposed at the upper end of the tool, and fitted in a tapered opening of the upper section 5, is a pipe 38, which affords means for operating the 4 tool.

In the operation of the tool, it is to be understood that the tool is lowered into the well tubing, pipe or liner to be cut, and when it reaches the proper depth, the tool is rotated in a clock- This movement results in the gripping jaws 25, biting into the inner surface of the pipe, tubing or liner under operation, securely holding the lower section of the tool against rotation.

Upon further pressure directed to the tool to rotate the tool, the upper section and tube 7 will rotate, causing the knives 11 and blades 15 to be extended into engagement with the pipe, liner or tubing.

As the upper section rotates, the knives will cut into the article under operation, cutting the same. During the cutting operation, the spring 29 acts to exert a holding pressure on the feed disk 17, the feed disk continuing to force the cutters outwardly until the article is cut.

When the tool is rotated in the reverse direction, the jaws 25 return to their innermost positions, releasing the tool, so that it may again be positioned for cutting another section.

Having thus described the invention what is claimed is:

A pipe cutting tool comprising a body portion including an upper section and a lower section, a supporting tube secured to the upper section and extended through the lower section, a bearing plate mounted on the supporting tube, a bearing disk mounted on the tube above the bearing plate, ball bearings between the bearing plate and bearing disk, yieldable means engaging the bearing disk and lower section, normally urging the sections of the body portion together, but permitting rotary movement of the upper section under excessive pressure, means on the lower section for gripping a pipe in which the tool is positioned, cutting knives carried by the upper sec tion for cutting the pipe in which the tool is positioned, and means for moving the knives outwardly into engagement with the pipe being cut, when the tool is rotated.

ROBERT D. BRANNON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2803301 *Sep 11, 1953Aug 20, 1957Warner William DInside cutter
US6598678Nov 13, 2000Jul 29, 2003Weatherford/Lamb, Inc.Apparatus and methods for separating and joining tubulars in a wellbore
US6851475Mar 14, 2003Feb 8, 2005Weatherford/Lamb, Inc.Apparatus and methods for separating and joining tubulars in a wellbore
US6851476Aug 2, 2002Feb 8, 2005Weather/Lamb, Inc.Dual sensor freepoint tool
US6899181Jan 22, 2003May 31, 2005Weatherford/Lamb, Inc.Methods and apparatus for expanding a tubular within another tubular
US7004257Nov 29, 2004Feb 28, 2006Weatherford/Lamb, IncApparatus and methods for separating and joining tubulars in a wellbore
US7383876Feb 8, 2005Jun 10, 2008Weatherford/Lamb, Inc.Cutting tool for use in a wellbore tubular
US7398832May 5, 2003Jul 15, 2008Enventure Global Technology, LlcMono-diameter wellbore casing
US7410000May 20, 2005Aug 12, 2008Enventure Global Technology, Llc.Mono-diameter wellbore casing
US7438132Apr 23, 2003Oct 21, 2008Shell Oil CompanyConcentric pipes expanded at the pipe ends and method of forming
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US7513313Sep 22, 2003Apr 7, 2009Enventure Global Technology, LlcBottom plug for forming a mono diameter wellbore casing
US7552776Oct 13, 2005Jun 30, 2009Enventure Global Technology, LlcAnchor hangers
US7559365Nov 12, 2002Jul 14, 2009Enventure Global Technology, LlcCollapsible expansion cone
US7712522Apr 3, 2007May 11, 2010Enventure Global Technology, LlcExpansion cone and system
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US7819185Aug 12, 2005Oct 26, 2010Enventure Global Technology, LlcExpandable tubular
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US20030192705 *Apr 23, 2003Oct 16, 2003Shell Oil Co.Forming a wellbore casing while simultaneously drilling a wellbore
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WO2003014526A1 *Aug 5, 2002Feb 20, 2003Weatherford / Lamb, Inc.Dual sensor freepoint tool
Classifications
U.S. Classification166/55.7
International ClassificationE21B29/00
Cooperative ClassificationE21B29/005
European ClassificationE21B29/00R2