Down hole shock absorber
Patent
·
OSTI ID:5434389
This patent describes a well pump system. It comprises: a sucker rod string; a pump reciprocable in response to the string; a cylinder; a piston disposed for vertical reciprocal motion within the cylinder; means for biasing the cylinder and the piston against compressive motion; means for pneumatically relieving pressure in the cylinder during compressive motion; and means for preventing relative rotational motion and for limiting relative expansive motion between the cylinder and the piston; the cylinder and the piston being coaxially mounted in the sucker rod string proximate and above the pump to buffer forces transmitted through the string.
- Assignee:
- NOV; NOV-91-018055; EDB-91-121737
- Patent Number(s):
- US 4997037; A
- Application Number:
- PPN: US 7-385814
- OSTI ID:
- 5434389
- Resource Relation:
- Patent File Date: 26 Jul 1989
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pneumatic pump actuator for oil wells
Oil well sucker rod shock absorber
Hydraulic well pumping apparatus
Patent
·
Tue Jul 16 00:00:00 EDT 1991
·
OSTI ID:5434389
Oil well sucker rod shock absorber
Patent
·
Tue Feb 18 00:00:00 EST 1986
·
OSTI ID:5434389
Hydraulic well pumping apparatus
Patent
·
Tue Mar 03 00:00:00 EST 1987
·
OSTI ID:5434389