Method of and apparatus for measuring bottom hole well pressure

Details Method of and apparatus for measuring bottom hole well pressure Method of and apparatus for measuring bottom hole well pressure

1978-07-31

1979-07-03

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

166250, E21B 4706

Patent

active

041596439

ABSTRACT:
A method of and apparatus for measuring bottom hole pressure in the tubing of a well by installing an isolation assembly in the tubing by a locking and sealing device in which the assembly includes first and second ports in communication between the interior of the assembly and the interior of the tubing. A sensor prong is releasably installed in the isolation assembly and includes a pressure measuring instrument releasably connected thereto. After the well is flowed through the first port, the first port is closed by actuation of the prong, and pressure measurements are taken through the second port by the pressure measuring instrument. After completion of the measurement, the measuring instrument may be released from the prong and retrieved. The prong is thereafter retrieved. The first port, which is larger than a second port, is initially releasably held open. The isolation assembly includes seals above and below the second port for sealingly engaging the prong and may be covered by a protective fluid for protecting the seals from the well fluid. The second port may include a check valve normally closed but opened by insertion of the prong.

REFERENCES:
patent: 3051243 (1962-08-01), Grimmer et al.
patent: 4051897 (1977-10-01), Kingelin
patent: 4083401 (1978-04-01), Rankin

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