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:
May. 16, 2000
Filed:
Dec. 10, 1997
Applicant:
Inventors:
Ashley Bernard Johnson, Milton, GB;
David Scott, Huntingdon, GB;
David M Eslinger, Broken Arrow, OK (US);
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166312 ; 166223 ;
Abstract
An apparatus for cleaning subterranean wellbores is described. The apparatus comprises a sleeve member which is fixed to a part of the drillstring and a rotatable jet head with nozzles through which an abrasive fluid is discharged. The nozzles are mounted such that the fluid jet is directed to an area of the wellbore immediately adjacent to a leading edge of the sleeve. The nozzle head is restricted in its protrusion out of the sleeve.