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. 15, 2007
Filed:
May. 19, 2005
Malcolm D. Mcgregor, The Woodlands, TX (US);
Gregory N. Gilbert, Sugar Land, TX (US);
Mark A. Proett, Missouri City, TX (US);
James M. Fogal, Houston, TX (US);
David Welshans, Damon, TX (US);
Glenn C. Gray, Austin, TX (US);
Svetozar Simeonov, Houston, TX (US);
Laban M. Marsh, Houston, TX (US);
Jean Michel Beique, Katy, TX (US);
James E. Stone, Porter, TX (US);
Malcolm D. McGregor, The Woodlands, TX (US);
Gregory N. Gilbert, Sugar Land, TX (US);
Mark A. Proett, Missouri City, TX (US);
James M. Fogal, Houston, TX (US);
David Welshans, Damon, TX (US);
Glenn C. Gray, Austin, TX (US);
Svetozar Simeonov, Houston, TX (US);
Laban M. Marsh, Houston, TX (US);
Jean Michel Beique, Katy, TX (US);
James E. Stone, Porter, TX (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown piston then creates a volume within a cylinder to draw formation fluid into the volume through the probe assembly. The pressure of the fluid within the cylinder is monitored. The formation test procedure may then be adjusted. The test procedure may be adjusted to account for the bubble point pressure of the fluid being monitored. The pressure may monitored to verify a proper seal is formed or is being maintained. The test procedure may also be performed by maintaining a substantially constant drawdown rate using a hydraulic threshold or a variable restrictor.