Patent ID: 6367553
Filing Date: 2002-04-09
Classification: E21B

Abstract:
A method of conducting wireline operations in deep subsea environment, comprising the following steps:a. providing a rig having a riser extending between the rig floor and the floor of the body of water; b. providing at least a hydril and BOP stack secured to the lower end of the riser; c. lowering a drill string down the annulus of the riser; d. positioning a wireline subsea blowout preventer control head assembly at the end of the drill string; e. securing a length of pipe to the lower end of a wireline entry apparatus; f. sealingly engaging the length of pipe by the hydril and BOP stack; g. lowering a tool on the end of a wireline through the wireline entry apparatus so as to conduct wireline operations below the hydril, while being able to maintain pressure on the drill string.