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Method and Apparatus for Selective Shifting of Valves

IP.com Disclosure Number: IPCOM000243832D
Publication Date: 2015-Oct-19
Document File: 3 page(s) / 113K

Publishing Venue

The IP.com Prior Art Database

Abstract

A system and method is described enabling the activation of multiple downhole valves with pumped dropped objects of similar size and shape The approach is an improvement over conventional ball and sleeve completions because larger internal diameters are maintained over multiple valves The approach also represents an alternative to ball counter mechanisms which enable similar functionality though at some elevated risk

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Method and Apparatus for Selective Shifting of Valves

A system and method is described enabling the activation of multiple downhole valves with pumped/dropped objects of similar size and shape.  The approach is an improvement over conventional ball and sleeve completions, because larger internal diameters are maintained over multiple valves.  The approach also represents an alternative to ball-counter mechanisms which enable similar functionality though at some elevated risk.

US 8,590,628 describes a shifting tool and sleeve combination that limits the risk of unintended sleeve shift.  The approach employs a shifting collet with tabs/dogs that feature helically shaped protrusions.  The corresponding sleeve features a fixed component that contains helical grooves on the interior surface of the part intended to mate the helically shaped protrusions on the shifting collet in both number and width.  The sleeve also features a shift-able insert retained in place by a shear-able member, and includes grooves and a landing profile on the interior surface aligned with the helical slots in the fixed component.  In use, the shifting collet is mounted on a mandrel allowing rotation.  As the collet is moved axially through the sleeve, there is at least one position along that length where the helically shaped protrusions will snap into the helical grooves in the interior of the fixed portion of the sleeve by nature of the pitch and length of the helix.  Once this has happened, continued axial motion of the collet causes it to rotate relative to the mandrel.  Motion in the direction of the shift-able portion of the sleeve will allow the collet protrusions to move into the grooves in the shift-able portion of the sleeve, contact the mating profile in the grooves, and ultimately enable sleeve shift through continued axial motion with sufficient force to shear the shear-able member.  The invention is to build on this selective concept for use in multi-zone completion systems that traditionally employ dropped balls into specifically sized ball seats. ...