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:
Jun. 26, 2001
Filed:
Feb. 01, 1999
Than Shwe, Houston, TX (US);
Mike Flecker, Houston, TX (US);
Steve Thompson, Houston, TX (US);
Roy Torrance, Houston, TX (US);
Wood Group Logging Services Holdings, Inc., Houston, TX (US);
Abstract
A method of determining the real time bubble point pressure of a fluid originating from a subsurface earth formation using an adjustable choke positioned downhole adjacent to the formation. The adjustable choke is placed into communication with the wellbore fluid flowing from the formation to the surface. The adjustable choke has a remotely adjustable choke opening for selectively restricting the flowrate of the fluid flowing through the choke. The adjustable choke has a pressure sensor for measuring the fluid pressure downstream of the choke opening. The method includes obtaining downstream fluid pressure data as a function of choke size for generating a plot of downstream pressure versus choke size data which exhibits substantially linear behavior having two different slopes. Extrapolating a best-fit line through the set of data having a first slope so as to intersect an extrapolation of a best-fit line through the set of data having a second slope thereby provides the bubble point pressure of the fluid as the pressure corresponding to the intersection of the two lines.