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:
Feb. 23, 1988
Filed:
Sep. 22, 1986
George M Raulins, Farmers Branch, TX (US);
Other;
Abstract
Apparatus is disclosed for use in testing a formation of and/or performing remedial work within a subsea well by means of a pipe string which is lowered through a conductor depending from a drilling vessel at the water surface and releasably connected at its lower end to a blowout preventor stack mounted on the head of the well. The string is landed within the well head for depending from the wellhead into the well bore, and a connected as part of the pipe string is adapted to open and close the string in response to the supply and exhaust of control fluid from a source at the surface, whereby the well may be controlled upon closing the string and raising of the upper end of the string above the means for opening and closing it and closing of the blowout preventor thereabove.