Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing
Patent
1979-03-08
1981-03-24
Schwadron, Martin P.
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Cleaning or steam sterilizing
13732902, 13732903, 13732904, 166320, 175 38, 251 63, 251324, 251333, F16K 500
Patent
active
042574420
ABSTRACT:
This apparatus disclosed in its preferred form is a choke for controlling the flow of drilling mud which is highly abrasive. The abrasive drilling mud is introduced through a lateral port and an elongate, tubular body. In the tubular body, a fluid actuated, double acting piston is forced to a choke control position. The piston has appended to it a centralized, tubular extension which receives a sleeve of wear resistant material. The sleeve is positioned in a circular chamber communicated to the lateral port where the drilling mud is introduced. It travels toward a seat downstream of the body. The seat is formed of hardened material. The downstream outlet of the body is additionally lined with a wear resistant sleeve. An alternate embodiment is also disclosed. A hydraulic control system for operation of the choke is also disclosed.
REFERENCES:
patent: 662249 (1900-11-01), Cadman
patent: 855517 (1907-06-01), Nicodemus
patent: 1006564 (1911-10-01), Kinsey, Jr.
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patent: 2634754 (1953-04-01), Rahn
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patent: 3703908 (1972-11-01), Tellier
Schwadron Martin P.
Walton G. L.
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