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:
Feb. 11, 1992
Filed:
Apr. 02, 1991
Applicant:
Inventors:
Kirk L Harris, Duncan, OK (US);
Clyde Cook, Jr, Duncan, OK (US);
Assignee:
Halliburton Company, Duncan, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175 61 ; 166290 ; 166291 ; 166292 ;
Abstract
This invention relates to a method of changing the direction of drilling a well bore wherein a cement plug is formed in the well bore at a location therein where the direction of drilling is to be changed and a pilot hole is drilled in the plug. The cement plug is formed using a slurry containing hydraulic cement consisting of discrete particles having a particle size not greater than about 30 microns. The use of such finely divided hydraulic cement significantly reduces the waiting time required for the slurry to develop sufficient compressive strength.