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:
Dec. 12, 1989
Filed:
Jun. 23, 1988
Denver K Kimberlin, Norman, OK (US);
Engineering Enterprises, Inc., Norman, OK (US);
Abstract
A downhole bladder pump for pumping ligher-than-water liquids. The pump includes an outer tube closed at its bottom and top, but having slots adjacent its upper end to admit the liquid to be pumped. Positioned concentrically within the outer tube is a cylindrical bladder chamber. A cylindrical bladder is mounted within the bladder chamber and registers with the internal surface of such chamber. A cyclically-operated pneumatic control system periodically delivers pressurized air to the space between the bladder and the bladder chamber to collapse the bladder and pump liquid which has flowed into the bladder. At other times during the cycle, the control system draws the bladder outwardly against the internal surface of the bladder housing by the application of vacuum. The liquid to be pumped is then forced into the bladder through a check valve subassembly positioned in the lower end of the bladder housing. This liquid is next expressed or discharged through an upper check valve system located in the upper end of the bladder housing.