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:
Sep. 04, 2012
Filed:
Aug. 02, 2010
Toru Terabayashi, Sagamihara, JP;
Tsutomu Yamate, Yokohama, JP;
Hideki Kinjo, Sagamihara, JP;
Akihito Chikenji, Machida, JP;
Takeaki Nakayama, Machida, JP;
Oliver C Mullins, Houston, TX (US);
Soraya Sofia Betancourt, Cambridge, MA (US);
Michael O'keefe, Tasmania, AU;
Chengli Dong, Sugar Land, TX (US);
Toru Terabayashi, Sagamihara, JP;
Tsutomu Yamate, Yokohama, JP;
Hideki Kinjo, Sagamihara, JP;
Akihito Chikenji, Machida, JP;
Takeaki Nakayama, Machida, JP;
Oliver C Mullins, Houston, TX (US);
Soraya Sofia Betancourt, Cambridge, MA (US);
Michael O'Keefe, Tasmania, AU;
Chengli Dong, Sugar Land, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A downhole characterization apparatus for formation fluids is provided. The apparatus comprises a downhole tool including a flowline for flowing the formation fluids capable of isolating a quantity of the formation fluids in a portion thereof; and a pump unit for depressurizing the isolated formation fluids; and a measurement controller which controls the downhole tool. The measurement controller includes a rough value estimation unit which estimates a rough value of the bubble point pressure of the formation fluids; and a speed controller which controls the depressurizing speed of the pump unit such that the isolated formation fluids are depressurized at a first speed to a certain pressure which is a predetermined value higher than said estimated rough value, and the isolated fluids are depressurized at a second speed which is slower than said first speed in order to measure a precise value of the bubble point pressure.