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. 16, 2001
Filed:
Aug. 06, 1999
John E. Nelson, Houston, TX (US);
Lionel J. Milberger, Houston, TX (US);
Amin Radi, Houston, TX (US);
Norman Brammer, Aberdeen, GB;
ABB Vetco Gray Inc., Houston, TX (US);
Abstract
A running tool is used to install a load shoulder and a wear bushing in a subsea wellhead. A subsea wellhead has a locator shoulder, and grooved upper and lower profiles. The running tool has a cylindrical wear bushing that lands on a locator shoulder provided in the bore above a grooved lower profile in a wellhead housing. The running tool also carries a load shoulder ring and a split lock ring. The installation process consists of preparing the tool before running the tool subsea. Flowby ports on the running tool remain open during installation to speed the trip-in operation. The flowby ports are closed by lowering the central mandrel after the running tool lands. Then a portion of the wear bushing is moved downward, which in turn pushes the load shoulder out into the lower grooved profile to retain the load shoulder ring and wear bushing with the wellhead.