Formation testing instrument having extensible housing
AssigneeSchlumberger Technology Corporation
InventorsAndrew L. Kurkjian, John B. Elmer, William B. Underhill
Life of this patent
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Abstract
A well logging instrument is disclosed which includes a housing operatively coupled to a well logging conveyance and movable within the wellbore. The housing has therein a formation testing system and an axial extension mechanism. The axial extension mechanism controllably extends and retracts to allow the formation testing system to perform tests and take samples in an axially fixed position in the wellbore while the housing moves through the wellbore.
Claims22
A well logging instrument, comprising:
- a lower housing having therein a wellbore testing system adapted to be operated in an axially fixed position in a wellbore;
- an upper housing adapted to be operatively coupled to a well logging conveyance;
- and
- an axial extension mechanism operatively coupled between the lower housing and the upper housing, the extension mechanism adapted to controllably extend and retract so as to controllably lengthen and shorten the instrument, respectively.
A well logging instrument, comprising:
- a housing disposable in a wellbore, the housing having axial slots therethrough;
- an axial mechanism positioned within the housing;
- and
- a wellbore testing system movably positionable along the axial mechanism, the testing system adapted to extend through the slots of the housing and perform wellbore tests as the housing advances through the wellbore.
A method for testing an earth formation, comprising:
- (a) moving a logging instrument axially along a wellbore by operating a logging conveyance coupled to an upper end of the instrument;
- (b) deploying a testing system adapted to test formation parameters at a fixed axial position along the wellbore;
- (c) extending a length of the logging instrument by operating an axial extension mechanism disposed between the conveyance and the testing system;
- (d) testing the formation;
- (c) retracting the testing system;
- and
- (f) retracting the axial extension mechanism, wherein the deploying, extending the length, testing the formation and retracting the testing system and extension mechanism are performed while continuing to move the conveyance along the wellbore.
Dependencies are inferred from the claim text.