Wellhead seal unit

Details Wellhead seal unit Wellhead seal unit

2007-10-29

2010-06-22

Beach, Thomas A (Department: 3671)

Wells

Processes

Cleaning or unloading well

C166S360000, C166S174000, C166S085400, C166S082100

Reexamination Certificate

active

07740073

ABSTRACT:
A wellhead seal unit for sealing a subsea oil and/or gas well at the wellhead. The unit comprises a sleeve, sealingly engaged to the workstring and to which, blow out preventer rams can engage. The unit allows the workstring to be rotated and reciprocated within the wellbore without releasing the seal. Methods of cleaning the sealed well and performing an inflow test are described.

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