Wells – Processes – Assembling well part
Patent
1986-05-06
1987-08-11
Novosad, Stephen J.
Wells
Processes
Assembling well part
1661176, 166146, 166186, 166387, E21B 2303
Patent
active
046855238
ABSTRACT:
Downhole apparatus for converting conventional petroleum wells to gas lift or chemical injection operation by perforating the well tubing at the desired depth and thereafter installing a packoff anchor within the well tubing, without disturbing the setting thereof, to bridge the perforation, the packoff anchor having an elongate tubular body with a lateral flow port in its wall, seals above and below the flow port for sealing with the well tubing above and below the perforation, and a receptacle for receiving a flow control device, such as a gas lift valve or injection valve for controlling flow through the lateral port. Fluids, such as lift gas or treating fluids injected into the annulus at the surface enter the flow stream inside the well tubing through the perforation and lateral flow port but under control of the flow control device. Preferably this elongate tubular body is a side pocket mandrel, and that preferably of the orienting type. Any number of such packoff anchors may be installed in a well and flow control devices may be installed in or removed from them in any desired order. Means are disclosed for removably securing the packoff anchors in the tubing. Installations utilizing such packoff anchors are disclosed together with various methods for completing such installations.
REFERENCES:
patent: 2393404 (1946-02-01), Otis
patent: 2687775 (1954-08-01), Baker
patent: 3215208 (1965-11-01), Tamplen
patent: 3278192 (1966-10-01), Tamplen
patent: 3496953 (1970-02-01), Garrett
patent: 3626969 (1971-12-01), Garrett
patent: 3844352 (1974-10-01), Garrett
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patent: 4333527 (1982-06-01), Higgins et al.
Freiman Oscar H.
Kernal Dickie L.
Paschal, Jr. James H.
Carroll Albert W.
Melius Terry Lee
Novosad Stephen J.
Otis Engineering Corporation
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