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:
Oct. 14, 2003
Filed:
Feb. 05, 2002
John Self, Stavanger, NO;
Rolf Dirdal, Sola, NO;
Den Norske Stats Oljeselskap A.S., Stavanger, NO;
Abstract
A method and a system for testing a borehole in an underground formation by the use of so-called closed chamber testing. When carrying out the method, a test or production pipe ( ) is carried down the borehole, where the test pipe can be closed at its upper end and at its lower end is provided with a downhole assembly ( ) comprising equipment for testing of fluid flow from the formation ( ), the annulus ( ) between the test pipe ( ) and a casing ( ) in the borehole being shut off during the test by a gasket ( ) at a desired depth, and fluid from the formation being allowed to flow through the test pipe ( ) to a collecting tank ( ) coupled to the test pipe via a flow head ( ) at the upper end of the test pipe ( ). In the downhole assembly ( ) at the lower end of the test pipe ( ) there is releasably retained a pig ( ) forming a barrier between formation fluid and a lightweight damping fluid ( ) filling the test pipe above the pig, the pig ( ) being released at the start of the test and being moved in a controlled manner upwards in the pipe ( ) as a result of a positive pressure difference between the fluids below and above the pig.