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:
Aug. 01, 1995
Filed:
Jul. 27, 1994
Louis M Gambertoglio, The Woodlands, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A liner cementing system and method provide for a landing collar 10 with a bypass passageway 45. Circulation port 62 in collar 10 permits initial circulation through the liner 17 until a pump down plug P1 is pumped therein to seal off circulation therethrough. An increase in pressure in the liner bore 51 acts on a piston 50 until shear ring 48 is sheared at a selected pressure. Cement 90 may then flow through the bypass passageway 45 into a cement shoe 104 and into an annulus 74 to cement the liner 17 in place. Pump down plug P2 seals off the bypass passageway 45 to stop flow into the annulus 74. The closing of circulation port 62, the opening of bypass port 53, and the closing of bypass port 53 produce pressure signals at the surface which may be used to analyze cement job success.