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:
Jan. 14, 1992
Filed:
Nov. 28, 1990
Martin Thompson, Histon, GB;
Schlumberger Technology Corporation, Houston, TX (US);
Abstract
A method of real time analysis and control of a fluid influx from an underground formation into a wellbore being drilled with a drill string, a drilling and circulating from the surface down to the bottomhole into the drill string and flowing back to the surface in the annulus defined between the wall of the wellbore and the drill string, the method comprising the steps of shutting-in the well, when the influx is detected; measuring the inlet pressure P.sub.i or outlet pressure P.sub.o of the drilling mud as a function of time at the surface; determining, from the increase of the mud pressure measurement, the time t.sub.c corresponding to the minimum gradient in the increase of the mud pressure and controlling the well from the time t.sub.c.