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US 2014/0196910 A1Published application
Apparatus and methods of running casing
AssigneeWeatherford/Lamb, Inc.
InventorTuong Thanh LE
Life of this patent
Estimating the term…
Abstract
In one embodiment, the first casing string is releasably coupled to a second casing string using a latch assembly. The second casing string is released from the conductor after the first casing string is properly positioned in the wellbore. The latch assembly is configured to release the coupling by manipulating the second casing string relative to the first casing string.
Claims20
A method of coupling a first tubular to a second tubular, comprising:
- disposing the second tubular in the first tubular, wherein the first tubular includes a latch member and the second tubular includes a second latch member;
- engaging the first latch member with the second latch member by extending the first latch member toward the second latch member;
- maintaining engagement of the first latch member to the second latch member;
- and
- applying a downward force to retract the first latch member, thereby disengaging the first latch member from the second latch member.
2 more elements
A latch assembly, comprising:
- a latch housing having a first latch member;
- a latch mandrel having a second latch member, wherein the latch mandrel is disposed in the latch housing;
- and
- an elevator for extending and retracting the first latch member relative to the second latch member for engaging or disengaging the first latch member to the second latch member, wherein the first latch member is rotatable relative to the elevator to lock the first latch member in an engaged position with the second latch member.
1 more element
A casing assembly comprising:
- a first casing having a first latch member;
- a second casing having a second latch member, wherein the second casing is disposed in the first casing;
- and
- an elevator for extending and retracting the first latch member relative to the second latch member, wherein the first latch member is rotatable relative to the elevator to lock the first latch member in an engaged position with the second latch member.
1 more element
Dependencies are inferred from the claim text.