Pumps – Motor driven – Fluid motor
Patent
1979-03-21
1981-10-06
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
91329, 91319, F04B 4708, F01L 2506
Patent
active
042932874
ABSTRACT:
A reversing control valve for a fluid operated downhole oil well pump having reciprocating pistons that is constructed to control the velocity and reversing of the pistons. The control valve functions to control the piston velocity and prevent damage to the pump components due to shock stresses induced by pressure impulses typically associated with pumped well fluids. The reversing control valve is constructed to regulate the piston velocity in response to the sensing of several pressure conditions in the well and in the pump.
REFERENCES:
patent: 2081220 (1937-05-01), Coberly
patent: 2311157 (1943-02-01), Coberly
patent: 2935953 (1960-05-01), Coberly
patent: 2949857 (1960-08-01), Coberly
patent: 3082749 (1963-03-01), Coberly
patent: 3849030 (1974-11-01), McArthur et al.
patent: 3922116 (1975-11-01), Pugh
Dresser Industries Inc.
Hazelwood J. N.
Peoples W. R.
Smith Leonard E.
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