Oil well testing string bypass valve

Details Oil well testing string bypass valve Oil well testing string bypass valve

1979-05-16

1981-03-31

Leppink, James A.

Wells

Valves, closures or changeable restrictors

137535, 166323, 166326, 251318, 251337, E21B 3310, E21B 4700

Patent

active

042587930

ABSTRACT:
An improved bypass valve for use with an oil well testing string is disclosed which includes a check valve means for allowing fluid flow from the interior of the test string to the well annulus when the interior pressure exceeds the well annulus pressure. The bypass valve further includes a blocking means which blocks interior communication with the check valve means when the well annulus pressure exceeds the string interior pressure. A delay means is included which delays the action of the blocking means for a predetermined length of time. The improved bypass valve is intended for use in a testing string for an oil well, and is to be placed in the testing string below a normally closed tester valve and above a seal assembly for insertion into sealing engagement with a preset production type packer. The time delay allows the seal assembly to be removed from the packer after the packer location is determined without activating the blocking means to move to its locked closed position.

REFERENCES:
patent: 2251977 (1941-08-01), Burt
patent: 2644526 (1953-07-01), Lee
patent: 3053322 (1962-09-01), Kline
patent: 3193016 (1965-07-01), Knox
patent: 3583481 (1971-06-01), Vernotzy
patent: 3750752 (1973-08-01), Mott
patent: 3814182 (1974-06-01), Giroux
patent: 3858649 (1975-01-01), Wray et al.
patent: 4063593 (1977-12-01), Jessup
patent: 4064937 (1977-12-01), Barrington

Affiliated with

Also associated with

Rating

Oil well testing string bypass valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oil well testing string bypass valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil well testing string bypass valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2238702