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Title: Down hole shock absorber

Abstract

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.

Inventors:
Publication Date:
OSTI Identifier:
5434389
Patent Number(s):
US 4997037; A
Application Number:
PPN: US 7-385814
Assignee:
NOV; NOV-91-018055; EDB-91-121737
Resource Type:
Patent
Resource Relation:
Patent File Date: 26 Jul 1989
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; ROD PUMPS; SHOCK ABSORBERS; DESIGN; NATURAL GAS WELLS; OIL WELLS; PUMPS; WELLS; 020300* - Petroleum- Drilling & Production; 030300 - Natural Gas- Drilling, Production, & Processing

Citation Formats

Coston, H A. Down hole shock absorber. United States: N. p., 1990. Web.
Coston, H A. Down hole shock absorber. United States.
Coston, H A. 1990. "Down hole shock absorber". United States.
@article{osti_5434389,
title = {Down hole shock absorber},
author = {Coston, H A},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5434389}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 05 00:00:00 EST 1990},
month = {Mon Mar 05 00:00:00 EST 1990}
}