Auxiliary controlled valve disposed in a drilling string

Details Auxiliary controlled valve disposed in a drilling string Auxiliary controlled valve disposed in a drilling string

1983-08-01

1985-05-28

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 24, 251 37, 251 635, 251127, 137219, 137599, 138 40, 166319, 367 85, F16K 3112

Patent

active

045195749

ABSTRACT:
An auxiliary controlled valve including a valve body (8) displaceable against a valve seat (9) disposed in a drilling string (6) to produce pressure pulses in drilling fluid renders possible a selective closing or opening of a low-resistance transmission section (12) which lies parallel to a main throttle section (10). The valve has a central passage which permits the passage of measuring instruments through the valve regardless of the particular position of a valve body (8). The valve body (8) is largely balanced out with regard to dynamic flow forces so that only a comparatively small actuating force is necessary.

REFERENCES:
patent: 1763286 (1930-06-01), Wilman
patent: 2651325 (1953-09-01), Lusignan
patent: 2772691 (1956-12-01), Hoffman
patent: 2898088 (1959-08-01), Alder
patent: 3212521 (1965-10-01), Jean
patent: 3693428 (1972-09-01), Peuvedic et al.
patent: 3976100 (1976-08-01), Souslin
patent: 4336564 (1982-06-01), Wisniewski et al.

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