Sub surface safety valve block, particularly suitable for the ri

Details Sub surface safety valve block, particularly suitable for the ri Sub surface safety valve block, particularly suitable for the ri

1989-02-24

1990-11-06

Neuder, William P.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166348, 166363, 166367, E21B 33038

Patent

active

049678426

ABSTRACT:
An underwater sub-surface safety valve block is connected between a well head located at the sea bottom, and the lower end of a riser. This allows the production tube and/or the service tube of the completion string to be closed by means of gate valves. This sub-surface safety valve block comprises a valve body provided with a vertical through-bore tightly closed at its upper end by a packer to which the upper portion of the completion string is connected. The bottom is tightly closed by a tubing hanger to which the lower portion of the completion string is connected. The packer and the tubing hanger are fastened inside the through-bore by means of a mechanical hooking which can be disengaged by means of a hydraulic controlled action. They are each provided with a through-channel in order to connect the respective production tubes with the central region of the through-bore, which can be closed by means of a gate valve. The through-bore is also connected to two branched channels to connect the relevant service tube and the relevant hydraulic-drive lines used to drive the SCSSV safety valve, respectively with a service channel and a control channel provided inside said valve body, with a further gate valve to allow this latter service channel to be closed.

REFERENCES:
patent: 3137348 (1964-06-01), Ahlstone et al.
patent: 4403658 (1983-09-01), Watkins

Affiliated with

Also associated with

Rating

Sub surface safety valve block, particularly suitable for the ri does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sub surface safety valve block, particularly suitable for the ri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sub surface safety valve block, particularly suitable for the ri will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1301840