Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2007-04-17
2007-04-17
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S073000, C175S230000, C175S325100
Reexamination Certificate
active
11061339
ABSTRACT:
A steering tool for use in a well bore is disclosed. The tool includes at least one extendable and retractable blade deployed thereon. The blade is elastically spring biased radially inwards towards the tool such that upon removal of an actuating force, the blade retracts. In exemplary embodiments, the blade includes at least one spring-like, elastically deformable member disposed to elastically spring bias the blade. The spring-like member may include first and second elongated leg portions located on opposing sides of a sprung hairpin portion. Tools embodying this invention may be advantageous for small diameter applications.
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Moody Michael J.
Paluch William C.
Song Haoshi
PathFinder Energy Services, Inc.
Thompson Kenneth
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