Early gas detection system for a drill stem test

Details Early gas detection system for a drill stem test Early gas detection system for a drill stem test

1981-09-28

1983-07-12

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

E21B 4700

Patent

active

043923771

ABSTRACT:
A method for testing earth formations informs the operator of the density of the formation fluid being produced before it reaches the surface. In the method, a bypass sub is secured to the drill string. The bypass sub has a bore for receiving a wireline tool that has sensing instruments. The wireline tool also has arms that will shift a sleeve to open and close the bypass sub. The wireline tool has a density measuring device for measuring the density of the formation fluid and providing a concurrent surface indication. A reversing valve is located above the bypass sub and is of a type that provides a port for reverse circulation while the wireline tool is still downhole. Preferably, the reversing valve is shifted by the wireline tool to the open position.

REFERENCES:
patent: 3258963 (1966-07-01), Bryant et al.
patent: 4083401 (1978-04-01), Rankin
patent: 4094359 (1978-06-01), King
patent: 4108243 (1978-08-01), King et al.

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