초록 ▼

Disclosed is a wireline well servicing system for underwater wells utilizing a lubricator stack having upper and lower sections connected by a remotely operable connector. The lower lubricator section includes a remotely operable valve connectable to a wellhead and a stress joint connected on the va

Disclosed is a wireline well servicing system for underwater wells utilizing a lubricator stack having upper and lower sections connected by a remotely operable connector. The lower lubricator section includes a remotely operable valve connectable to a wellhead and a stress joint connected on the valve. The valve may be closed to retain pressure control of the well if the stress joint is fractured in bending by side loading on the lubricator stack. The upper lubricator section includes a remotely operable wireline clamp and cutter unit on a stuffing box. The clamp and cutter are remotely operable by the same control conduit to quickly clamp and cut the wireline to permit emergency removal of the surface service vessel. After the service vessel has moved back into working position above the underwater well, wireline servicing operations may be continued by latching onto the clamp cutter unit with a pulling tool on wireline from the vessel, and lifting the clamp cutter unit while pulling the cut wireline through the stuffing box until the tools attached to the wireline reach top in the upper lubricator section. The upper lubricator section is disconnected from the lower section and lifted to the vessel to prepare the clamp and cutter unit for further operation and replace the cut wireline with continuous line.

대표청구항 ▼

A system for conducting wireline operations in an underwater well comprising: (a) remotely operable valve means connectable to a wellhead for closing the well; (b) remotely operable blowout preventer means connected to said valve means for maintaining pressure control of the well; (c) lubricator sta

A system for conducting wireline operations in an underwater well comprising: (a) remotely operable valve means connectable to a wellhead for closing the well; (b) remotely operable blowout preventer means connected to said valve means for maintaining pressure control of the well; (c) lubricator stack means connected to said blowout preventer means, said stack means having a wireline tool string therein and includes a lower section having a remotely operable section connector member therein, and an upper section including a remotely operable section connector member therein, said upper section connector member releasably connectable to said lower section connector member, at least one lubricator section, remotely operable wireline stuffing box means for sealing around the wireline, and remotely operable hydraulic actuated wireline clamp means and cutter means for clamping and cutting the wireline; (d) a floating vessel having mounted thereon lift line winch means for raising and lowering said lubricator stack means, wireline winch means for operating said wireline tool string in the well, a source of pressured fluid; and (e) control conduits for conducting pressured fluid from said pressured fluid source to said valve means, blowout preventer means, stuffing box, and one of said remotely operable section connector members, one of said control conduits conducting pressured fluid to said clamp means and said cutter means.