Apparatus for securing a measurement-while-drilling (MWD) instru

Details Apparatus for securing a measurement-while-drilling (MWD) instru Apparatus for securing a measurement-while-drilling (MWD) instru

1985-11-12

1987-07-21

Goldberg, Howard N.

Wells

Expansible anchor or casing

Fluid pressure actuated

166217, 175325, 29700, E21B 2300, E21B 2304

Patent

active

046811605

ABSTRACT:
A system for securing a measurement-while-drilling (MWD) instrument in a generally centralized position within a protective drill collar. The system includes a pressure responsive slidable contact pad member in combination with a plurality of fixed contact pad members. As the instrument is subjected to an increase in pressure, above atmospheric, a slidable contact pad member moves longitudinally along an inclined angle face of a base member into contact with the inner wall of the drill collar to thereby centralize and secure the instrument within the drill collar.

REFERENCES:
patent: 3011558 (1961-12-01), Conrad
patent: 3223170 (1965-12-01), Mott
patent: 3456723 (1969-07-01), Current et al.
patent: 4141413 (1979-02-01), Morris et al.
patent: 4423777 (1984-01-01), Mullins et al.

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