Wells – Processes – Disassembling well part
Reexamination Certificate
2006-09-05
2006-09-05
Bagnell, David (Department: 3672)
Wells
Processes
Disassembling well part
C166S242600, C285S004000
Reexamination Certificate
active
07100696
ABSTRACT:
The present invention generally relates to a disconnect for use in a wellbore to separate a tubular string from a stuck wellbore component. In one aspect, the invention includes a disconnect with a first portion and a second portion and a lock nut preventing the separation of the two portions. When a predetermined fluid force is applied to a piston in the disconnect, a tensile sleeve fails and the first and second portions of the disconnect separate, thereby leaving a portion of the disconnect in the wellbore with the stuck component. In one embodiment, the tensile sleeve's failure permits an annular piston to dislodge a wedge sleeve from the lock nut, thereby permitting separation of the first and second portion of the disconnect.
REFERENCES:
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PCT International Search Report, International Application No. PCT/GB 02/04341, dated Dec. 27, 2002.
Bagnell David
Coy Nicole A
Patterson & Sheridan LLP
Weatherford / Lamb, Inc.
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