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. 28, 1985
Filed:
Aug. 01, 1983
Applicant:
Inventor:
Rudolf Roper, Dortmund, DE;
Assignee:
Norton Christensen, Inc., Salt Lake City, UT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251 31 ; 251 24 ; 251 37 ; 251 635 ; 251127 ; 137219 ; 137599 ; 138 40 ; 166319 ; 367 85 ;
Abstract
An auxiliary controlled valve including a valve body (8) displaceable against a valve seat (9) disposed in a drilling string (6) to produce pressure pulses in drilling fluid renders possible a selective closing or opening of a low-resistance transmission section (12) which lies parallel to a main throttle section (10). The valve has a central passage which permits the passage of measuring instruments through the valve regardless of the particular position of a valve body (8). The valve body (8) is largely balanced out with regard to dynamic flow forces so that only a comparatively small actuating force is necessary.