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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.:

US 9982816 B1

PDFFull Text
Date of Patent:
May. 29, 2018

Filed:

Nov. 20, 2013

Pup joint for releasing sidewall contact of stratigraphic test device and apparatus

Applicants:

China National Offshore Oil Corp., Beijing, CN;

China Oilfield Services Limited, Beijing, CN;

Inventors:

Xiaofei Qin, Sanhe, CN;

Yongren Feng, Sanhe, CN;

Wanguang Song, Sanhe, CN;

Xiaodong Chu, Sanhe, CN;

Lei Wang, Sanhe, CN;

Assignees:

China National Offshore Oil Corporation, Beijing, CN;

China Oilfield Services Limited, Beijing, CN;

Attorneys:

Ling Wu

Stephan Yang

Ling and Yang Intellectual Property

Primary Examiner:

David Bochna

Int. Cl.
CPC ...
E21B 49/10 (2006.01); F16L 19/02 (2006.01); E21B 49/00 (2006.01); E21B 49/08 (2006.01);
U.S. Cl.
CPC ...
F16L 19/02 (2013.01); E21B 49/00 (2013.01); E21B 49/08 (2013.01); E21B 49/10 (2013.01);
Abstract

A pushing and jam-releasing pup joint of a formation tester comprises a first jam-releasing arm (), a first three-way reversing valve (V), a two-way reversing valve (V) and a third three-way reversing valve (V), a withdrawal cavity (Q) of the first jam-releasing arm () is connected with the first three-way reversing valve (V) which can communicate with an energy accumulation cavity (NQ) of an energy accumulator and the two-way reversing valve (V), the two-way reversing valve (V) can be communicated with a pressure oil main line (G) of a hydraulic system, and an extension cavity (Q) of the first jam-releasing arm () is connected with the third three-way reversing valve (V) which can communicate with the pressure oil main line (G) and a return oil main line (G) of hydraulic system. Jam-releasing pup joint effectively solves the problem of jam release when mud adheres to EFDT and makes same jammed.

Find Patent Forward Citations

Qin, Xiaofei. (2018). Pup joint for releasing sidewall contact of stratigraphic test device and apparatus (U.S. Patent No. 9982816). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9982816

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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