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:
Nov. 29, 1977
Filed:
Jun. 28, 1976
Applicant:
Inventor:
Joseph I Hart, Pointe-a-Pierre, TD;
Assignee:
Texaco Trinidad, Inc., Pointe-a-Pierre, TD;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166312 ; 166267 ;
Abstract
A cleanout procedure for use in a well with low bottom hole pressure that has become filled with sand. It employs a conductor string of pipe and a wash string of pipe inside the conductor string, both inserted in the well. A high pressure gas is applied to the inner annulus formed by the conductor and wash string, and the workover wash fluid is circulated down the wash string up the outer annulus formed by the well casing and the conductor string, to be joined by the gas and so wash out the sand through the outer annulus. Sand is separated at the surface.