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Hydraulic release running tool

a running tool and hydraulic technology, applied in the direction of drilling pipes, drilling casings, borehole/well accessories, etc., can solve the problems of non-trivial challenges and increased difficulty in relying on mechanical manipulation for running tools, and achieve the effect of avoiding accidental actuation of secondary mechanical release apparatus

Inactive Publication Date: 2005-06-16
INNICOR SUBSURFACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] In one embodiment of the invention, apparatus is provided for hydraulic release of a running tool from a downhole tool such as a liner hanger. In another embodiment, secondary apparatus is provided for mechanical release actuation of components of the hydraulic release as a backup. In yet another embodiment, a latch for releasably supporting a mandrel in a tubular tool is provided In yet another embodiment, a clutch is provided and in another embodiment the clutch is integrated with a running tool for avoiding accidental actuation of the secondary mechanical release apparatus. In an embodiment of the clutch, a ratchet is provided.

Problems solved by technology

Hydraulic running tools are often preferred for high angle and horizontal wells due to increased difficulty in relying on mechanical manipulation to release the running tool from the liner hanger once properly located.
The conditions of liner installation introduce non-trivial challenges for a running tool.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0042] Running Tool

[0043] In one embodiment of the invention, and shown generally in FIG. 1a, running tool 5 is provided featuring hydraulic release with optional backup mechanical release and a uni-directional torque clutch that provides premature release protection by dampening anti-backlash and over-rotation as shown in FIG. 1b. Such features are applied in downhole operational circumstances, including for releasable coupling with and running in and release of a liner hanger (not shown). Running tools incorporating the present invention can be applied for releasable connection tubular portions of other downhole tools and to greatest effect with tools that would be rotated and released and preferably rotated once released. The preferred embodiment is described in the context of running in, release and rotation, such as during the process of cementing of a liner hanger.

[0044] The running tool 5, liner hanger and depending new liner are run downhole to a setting depth, typically w...

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PUM

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Abstract

A running tool for a liner hanger has a mandrel supported by latch segments housed in a latch cage, the latch segments being engaged in the tubular portion of the hanger. In one mode, the latch cage is supported on latch shoulders temporarily restrained to the mandrel by a locking cylinder. Support of the latch cage ensures the latch segments remain engaged. Hydraulic actuation of the locking cylinder releases the latch shoulders, releasing the latch cage to move axially and disengage the latch segments. The mandrel is also supported using a drive housing axially engaging the liner hanger. If the hydraulic actuation fails, an indexed and relative reverse rotation of the mandrel releases the mandrel to lower through the drive housing and through the latch cage housing to the disengaged position. A barrel ratchet enables transmission of driving torque in one direction and ratcheting in a reverse direction.

Description

FIELD OF INVENTION [0001] The invention relates to hydraulic release running tools for setting rotatable liner hangers; and more particularly to running tools having a secondary mechanical release and backlash relief. BACKGROUND OF THE INVENTION [0002] Running tools are used in combination with liner hangers in wellbore drilling and completion operations. Following drilling of at least a segment of a wellbore, casing is positioned into the open hole and cemented into place. Drilling is continued below the cemented casing to extend the depth of the wellbore. At least a second length of smaller diameter casing is lowered into the extended wellbore on a tubing string equipped with a releasable running tool and a liner hanger. Mechanical release running tools are often used for vertical wellbores. Hydraulic running tools are often preferred for high angle and horizontal wells due to increased difficulty in relying on mechanical manipulation to release the running tool from the liner han...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B17/06E21B23/04E21B43/10
CPCE21B17/06E21B43/10E21B23/04
Inventor CRAM, BRUCE A.O'DWYER, KEVIN
Owner INNICOR SUBSURFACE TECH
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