Quarter turn torque anchor and catcher

a quarter-turn torque and catcher technology, applied in the direction of tubing catchers, fluid removal, drilling accessories, etc., can solve the problems of affecting the use effect, the cost of manufacturing the threaded parts, and the prone to breakage of the stop pin during us

Inactive Publication Date: 2015-02-12
TAZCO HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0031]The unsetting of said tubing anchor comprises reversing the steps to extend said slips and set said anchor. A secondary unsetting of said tubing anchor comprises increasing said further pull on said mandrel until the failure shear resistance of said pins is exceeded.

Problems solved by technology

Disadvantages of such tubing anchors include the expense of manufacturing the threaded portions, and the stop pins are vulnerable to breakage during use.

Method used

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  • Quarter turn torque anchor and catcher
  • Quarter turn torque anchor and catcher
  • Quarter turn torque anchor and catcher

Examples

Experimental program
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Effect test

Embodiment Construction

[0055]Referring first to FIGS. 1 to 5, a preferred embodiment of a tubing anchor, generally indicated by reference numeral 10, is shown inserted within a well conduit 12, such as a wellbore casing. The tubing anchor is shown in an unset, or “run-in”, orientation in which it can be run inside the well conduit on a tubing string, along with other well equipment 14, such as a safety sub, attached above and below. In particular, the well equipment is attached to a cylindrical mandrel 20 having attachment means, such as an inner threaded lower end 22 and an outer threaded upper end 24. In this embodiment, the tubing anchor is run down the well conduit on the tubing string in the direction indicated by arrow 16. It is noted, however, that terms such as “up”, “down”, “forward”, “backward” and the like used to identify certain features of the tubing anchor when placed in a well conduit is not intended to limit the tubing anchor's use or orientation. Further, when describing the invention, a...

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PUM

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Abstract

A tubing anchor for anchoring and catching well equipment in a well conduit to arrest movement in both longitudinal directions and rotation in a first direction. A mandrel connected to the equipment has in one embodiment C or reverse C-shaped grooves when viewed in front elevation for slideably receiving respective pins from a drag body on the mandrel. A slip retainer on the mandrel houses slips for selectively engaging and disengaging the conduit. An initial pull of the mandrel causes the pins to move the drag body toward the slip retainer driving the slips outward to grip the conduit. Rotation of the mandrel in the first direction sets the anchor to arrest movement. Further pulling and a reversed turn of the mandrel maintains the set position. A spring biases the slips outward to maintain their set to catch the well equipment in the event of a break in the string above the anchor.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from Canadian Patent Application No. ______ filed Jun. 14, 2014 entitled Quarter Turn Torque Anchor and Catcher. This application is a continuation in-part of U.S. patent application Ser. No. 13 / 716,075 filed ______ and entitled Quarter Turn Tension Torque Anchor.FIELD OF THE INVENTION[0002]The present invention relates to tools for oil and gas wells generally, including wells accessing heavy crude, and in particular relates to a ¼ turn tension torque or tubing anchor (collectively herein a tubing anchor) and catcher for anchoring from rotation and linear movement, and catching well equipment, such as a progressive cavity or rod pump, and related tubing string in a well conduit.BACKGROUND OF THE INVENTION[0003]Known tubing anchors, also referred to as anchor catchers, use either a combination of right and left hand threads, or are limited to one thread orientation.[0004]Examples of such tubing anchors are ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B19/16E21B17/02
CPCE21B17/021E21B19/16E21B23/01E21B17/02E21B33/12
Inventor MOORE, EDWARD L.MCARTHUR, CHRISTOPHER S.HOFFMAN, JASEN L.KELM, KEVIN D.
Owner TAZCO HLDG
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