Flexible wellbore broach

Details Flexible wellbore broach Flexible wellbore broach

2007-12-18

2007-12-18

Bagnell, David (Department: 3672)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S055700

Reexamination Certificate

active

11037793

ABSTRACT:
A method and apparatus for milling and/or broaching within a wellbore. A flexible broach runs into the wellbore and is located adjacent a portion of the wellbore to be broached. The broach reciprocates axially within the wellbore and removes at least part of the portion to be broached. Weight may be coupled to the broach, thereby applying a resultant side load for broaching an offset portion of the wellbore. The broach comprises a flexible member that may be a bare cable. When an abrasive material is disposed on an outer surface of the flexible member, the flexible member may be a cable, a continuous rod, or pressurized coiled tubing. Alternatively, sleeves positioned on the flexible member may have an abrasive material on their outer surface. A rotational mill that is either coupled to the broach or run in separately from the broach can further mill the wellbore.

REFERENCES:
patent: 2716542 (1955-08-01), Goble
patent: 5109924 (1992-05-01), Jurgens et al.
patent: 5148877 (1992-09-01), MacGregor
patent: 5657820 (1997-08-01), Bailey et al.
patent: 6155349 (2000-12-01), Robertson et al.
patent: 6668945 (2003-12-01), Ohmer
U.K. Search Report, Application No. GB0500651.5, dated Mar. 14, 2005.
CA Office Action, Application No. 2,492,626, Dated Sep. 15, 2006.

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