E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 34/16 (2006.01) E21B 23/00 (2006.01) E21B 34/00 (2006.01) E21B 34/04 (2006.01) E21B 34/10 (2006.01) E21B 47/06 (2006.01)
Patent
CA 2221406
A retainer valve provides increased safety in wellsite operations. In a preferred embodiment, operation of the retainer valve may be responsive to control line pressure or to tubing pressure. The retainer valve response is controlled by several factors, among which are relative tubing and balance line pressures, and axial positions of a number of pistons relative to a tubular J-slot member. If the control and balance lines are disconnected, or otherwise unavailable for operation of the valve, it may still be operated by manipulation of the tubing pressure at the earth's surface. Thus, the valve may be opened in emergency situations in which the control and balance lines are unavailable, but operation of the valve is still needed in order to safely relieve trapped pressure in the tubing string and/or to kill the well, unlatch a subsea test tree, etc. The retainer valve is also useful as a lubricator valve.
Garcia-Soule Virgilio
Schwendemann Kenneth L.
Towers Darrin N.
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Power Well Services Canada Ulc
LandOfFree
Normally closed retainer valve with fail-safe pump through... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Normally closed retainer valve with fail-safe pump through..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Normally closed retainer valve with fail-safe pump through... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1783487