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:
Apr. 07, 1987
Filed:
Feb. 19, 1985
Applicant:
Inventor:
Edward T Wood, Kingwood, TX (US);
Assignee:
CTC Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166285 ; 166184 ; 166185 ; 166187 ; 166191 ; 166289 ; 166325 ; 166386 ; 166387 ;
Abstract
A method for cementing a casing or a liner traversing earth formations comprising the supplemental injection of cement at a pressure greater than the pore pressure in the earth formations during a cementing operation to enchance the effectiveness of the cement integrity by maintaining hydrostatic pressure in an annulus between the pipe and the borehole at a location where the pore pressure of the earth formations is apt to impair the cement integrity in the annulus thereby preventing annular migration of gas or liquids in the cement seal between the earth formations and a liner or casing.