Liner hanger/packer apparatus with pressure balance feature on anchor slips to facilitate removal

Patent metadata

Field	Value
Publication number	US-8997858-B2
Application number	US-201313740908-A
Country	US
Kind code	B2
Filing date	Jan 14, 2013
Priority date	Jan 14, 2013
Publication date	Apr 7, 2015
Grant date	Apr 7, 2015

Abstract

A liner hanger/packer apparatus operates by sequential expansion of a slip ring and then a sealing element. The hanger slips are set by pressure on a seated ball actuating anchor slips to grip followed by a stroker assembly and a swage making a first movement. The ball seat is defeated and the liner is cemented. A pickup force extends landing dogs so that a subsequent set down force releases a flapper to close and closes off fluid ports associated with the anchor slips so that pressure on the closed flapper sets the anchor and strokes the swage a second stroke to set the sealing element. A rupture disc breaks in the flapper after further relative movement of mandrel components to open the fluid displacement ports so that the anchor is in pressure balance to backpressure developed from fluid moving through the now broken disc as the running tool is removed.

First claim

I claim:

1. A running tool for delivery and sequential expansion into an existing tubular of a hanger mounted to a tubular string followed by expansion of a sealing assembly mounted to the tubular string, comprising:
a mandrel having an upper end and a passage therethrough;
an anchor assembly on said mandrel selectively engageable to the tubular string;
a stroker assembly on said mandrel to selectively drive a swage assembly into the tubular string while said anchor assembly s…

Assignees

• Baker Hughes Inc

Inventors

• Tom Andy

Classifications

• E21B43/105 Primary

  Fixed Constructions · mapped topic

• E21B33/12

  Fixed Constructions · mapped topic

• E21B17/046

  Fixed Constructions · mapped topic