The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1999
Filed:
Jul. 22, 1997
Edward A Wells, Corpus Christi, TX (US);
Paul S Barter, Jr, Georgewest, TX (US);
Other;
Abstract
A method and apparatus for pumping formation liquids provides a reciprocating down hole pump on the end of a coiled tubing string. In one embodiment, one fluid flow path is provided through the inside of the coiled tubing and another flow path is provided in an annulus between the coiled tubing and a, production string. In one embodiment, pressure delivered down the annulus to the pump moves a piston in a direction to move formation liquids upwardly to the surface. When pressure in the annulus is reduced, the hydrostatic weight of the pumped liquid moves the piston in a retracting direction to prepare for the next stroke. In other embodiments, the piston is moved downwardly, in retracting direction, by fluid pressure applied from the surface.