Apparatus for positioning a liner on a tubular member in a well bore with a retrievable pack off bushing therebetween
AssigneeTexas Iron Works, Inc.
InventorsBritt O. Braddick, Hiram E. Lindsey
Life of this patent
Estimating the term…
Abstract
A method and apparatus for positioning and bonding a liner in a casing in a well bore wherein a pack off bushing is provided between the liner and the well string on which the liner is lowered into the well bore for discharge of a bonding agent through the well string and around the liner in the well bore. The seal or pack off bushing is constructed and arranged so that it may be retrieved after the positioning and bonding operations are completed along with the well string upon which the liner is initially lowered into the well bore.
Claims25
A retrievable pack off bushing for sealing between a liner and tubular member in a well string during bonding operations in a well bore comprising:
- (a) body means for fitting between the liner and tubular member;
- (b) seal means on said body for engaging the liner and tubular member for sealing therebetween;
- (c) cooperating surface means on the liner, tubular member and said body means engagable with each other to lock said body means to the liner for sealing between the liner and tubular member while accommodating axial movement of the tubular member;
- and
- (d) means to unlock said cooperating surface means from each other upon a predetermined amount of further relative longitudinal movement between the tubular member and said body means whereby said body means may be retrieved with the tubular member and well string from the well bore.
Apparatus for cementing a liner in a well bore including:
- (a) a setting string which extends longitudinally in the liner;
- (b) seal means releasably locked to the liner and sealingly engaging between said setting string and liner permitting at least limited axial movement of said setting string without movement of said seal means;
- and
- (c) cooperating means on said seal means, setting string and the liner to releasably lock said seal means against axial displacement while accommodating limited axial movement of said setting string, said cooperating means operable upon predetermined longitudinal movement of the setting string to unlock said seal means from the liner for removal with said setting string from the well bore.
A retrievable pack off bushing for sealing between a liner and tubular member in a well string during bonding operations in a well bore comprising:
- (a) body means for fitting between the liner and tubular member;
- (b) hanger means carried by said setting string operable to engage and hang the liner in the well bore;
- (c) connector means connecting the liner to said setting string and operable upon rotation of said setting string to release said setting string from the liner for axial movement of said setting string;
- (d) seal means on said body means for engaging the liner and tubular member for sealing therebetween;
- (e) cooperating surface means on the liner, tubular member and said body means engagable with each other to lock said body means to the liner for sealing between the liner and tubular member upon axial movement of the tubular member;
- and
- (f) means to unlock said cooperating surface means from each other upon a predetermined amount of further relative longitudinal movement between the tubular member and said body means whereby said body means may be retrived with the tubular member and well string from the well bore.
Apparatus for cementing a liner in a well bore comprising:
- (a) a setting tool having a tubular mandrel connected in a pipe string for extension through said liner;
- (b) seal means releasably attached to said liner and sealingly engaging the exterior of said mandrel and the interior of said liner permitting at least limited axial movement of said mandrel without movement of said seal means;
- (c) latch means included with said seal means engagable with corresponding groove means within said liner to releasably hold said seal means against axial displacement therein;
- and
- (d) said mandrel comprising a first portion and an axially spaced second portion of less diameter than said first portion, said first portion when in registration with said latch means preventing disengagement of said latch means from said groove means, said second portion when in registration with said latch means allowing disengagement of said latch means from said groove means.
Apparatus for cementing a liner in a well bore comprising:
- (a) a setting tool having a tubular mandrel connected in a pipe string for extension through said liner;
- (b) seal means releasably attached to said liner and sealingly engaging the exterior of said mandrel and the interior of said liner permitting at least limited axial movement of said mandrel without movement of said seal means;
- (c) said seal means comprising a first sleeve carrying a first annular seal for sealing and sliding engagement with said mandrel and a second sleeve carrying a second annular seal for sealing engagement with said liner;
- (d) said seal means comprising latch means engageable with corresponding groove means within said liner to releasably hold said seal means against axial displacement therein.
Dependencies are inferred from the claim text.