Measuring and testing – With fluid pressure – Leakage
Patent
1998-05-05
2000-04-04
Larkin, Daniel S.
Measuring and testing
With fluid pressure
Leakage
73 491, 16625008, G01M 328
Patent
active
060446900
ABSTRACT:
A shearable multi-gage blowout preventer test tool for testing different size ram and annular BOP's in one trip has an inner tube and an outer test tube assembly connected in telescoping relation. The inner tube is connected to a bottom sub and a release sub connected to the bottom end of the outer test tube assembly is slidably mounted on the inner tube. The outer tube assembly has a plurality of pipe gage diameters corresponding to different drill pipe sizes. A top sub at the top end of the outer tube assembly connects to the drill string. The release sub and outer tube assembly is connected to the bottom sub in the collapsed position. The bottom sub is connected to a test plug and tail pipe assembly and the tool is lowered through the riser pipe and BOP stack to set the test plug in the well. A wireline retrievable dart is engaged in the inner tube and drilling fluid flow bypasses the inner tube through fluid passageways between the inner and outer tube assemblies and is vented through ports in the release sub. Ram and annular BOPs are tested against a first set of the pipe gage diameters with the tool in its collapsed condition, and then the outer tube assembly is uncoupled from the bottom sub and lifted to its extended position such that another set of the pipe gage diameters are positioned within the BOP stack and the rams and annular BOPs are then tested against the second axially positioned set of corresponding pipe gage diameters.
REFERENCES:
patent: 2982125 (1961-05-01), Gilreath
patent: 3071960 (1963-01-01), Knapp et al.
patent: 4152924 (1979-05-01), Mayo
patent: 4373380 (1983-02-01), Mayo
patent: 4554976 (1985-11-01), Hynes et al.
patent: 4881598 (1989-11-01), Stockinger et al.
Larkin Daniel S.
Roddy Kenneth A.
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