Circulation tool

Details Circulation tool Circulation tool

2004-06-30

2008-10-28

Tsay, Frank S (Department: 3676)

Wells

Processes

Placing or shifting well part

C166S321000, C175S231000

Reexamination Certificate

active

07441607

ABSTRACT:
A downhole tool for circulating fluid in a well bore. The tool includes an axial inlet and outlet with radial second outlets. A sleeve moves over the second outlets to control circulation of fluid. The sleeve can be selectively locked in an opened or closed configuration while the tool is in tension or compression. Variation of fluid pressure in the work string and stroking the tool move the sleeve between the operating positions. Cyclic operation of the tool is also described.

REFERENCES:
patent: 5890540 (1999-04-01), Pia et al.
patent: 6152228 (2000-11-01), Carmichael
patent: 6173795 (2001-01-01), McGarian et al.
patent: 6520257 (2003-02-01), Allamon et al.
patent: 2003/0024706 (2003-02-01), Allamon
patent: 0251543 (1988-01-01), None
patent: 2 272 923 (1994-06-01), None

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