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:
Sep. 02, 1997
Filed:
May. 02, 1996
Stanley Hosie, Aberdeenshire, GB;
ABB Vetco Gray Inc., Houston, TX (US);
Abstract
A wellhead system has features which allow the injection of drilling cuttings in an annulus between first and second strings of casing. A wellhead assembly has an outer wellhead housing connected to a string of conductor pipe. An outer port is located in the sidewall of an extension member located below the outer wellhead housing. An inner wellhead housing lands in the outer wellhead housing. An inner port is located in an extension member below the inner wellhead housing. An internal landing shoulder is located within the conductor pipe. An external landing shoulder is located on a swivel connector joint mounted on the upper end of a first string of casing. The connector joint is secured to the inner wellhead housing extension member. Once landed, the landing shoulder on the connecting joint supports the weight of casing, allowing the inner wellhead housing to be rotated to orient the inner port with the outer port. The inner wellhead housing then may be moved downward a short distance to lock it into engagement with the outer wellhead housing.