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:
Apr. 10, 2001
Filed:
Aug. 11, 1998
Stig Bakke, Ålgård, NO;
Transocean Petroleum Technology AS, Tananger, NO;
Abstract
Hydraulically releasable coupling (,) of the kind arranged to releasably connect a tool to a coiled tube, and which coupling (,) is provided with two or more hydraulic channels (,) and (,), arranged to convey hydraulic fluid from hydraulic lines, arranged in the coiled tube, to the tool; and in which the coupling (,) is held in coupled position by a locking device (,) which is secured by means of an axially displaceable sleeve (,), which again is fixed in locking position by shear pins (,). The sleeve (,) is arranged to work as a sleeve-shaped hydraulic piston, the sleeve (,) being provided with annular seals (,) of different seal diameters, whereby the seals (,) define annular areas, each assigned to a hydraulic channel (,) and (,). The sleeve (,) is subjected to an axially acting force equaling the sum of the products of the pressure in each of the hydraulic channels and the thereto assigned annular area. The shear pins (,) are arranged to break, whenever both annular areas are subject to hydraulic working pressure.