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. 16, 1994
Filed:
Jun. 17, 1993
Roger Tailby, Algard, NO;
Den Norske Stats Oljeselskap A.S., Stavanger, NO;
Abstract
Washing tool for removing internal deposits in tubing parts and components in wells for oil or gas production, wherein the tool is to be run on coiled tubing and to be operated by fluid pressure. The tool comprises a main body (10) provided with discharge nozzles for discharging a washing fluid, and a valve member (12) which is axially movable within the main body (10) under pressure actuation and against a spring force (24), for opening one or more of the discharge nozzles. An external valve member (14) at an upper portion of the main body (10) is arranged for axial movement against the action of a spring (15A) urging the external valve member towards a position for blocking the fluid pressure from above. An actuation sleeve (15) on the external valve member (14) has lateral dimensions related to the dimensions of deposits to be removed, so that the actuation sleeve (15) will move the external valve member (14) to admit the fluid pressure from above, when the sleeve is pressed against a deposit to be removed. The valve member (12) within the main body (10) can be moved by fluid pressure in reciprocating movement between upper and lower positions as long as the fluid pressure from above is present.