Wells – Above ground apparatus – Fluid catcher around pipe coupling
Patent
1998-01-16
2000-09-19
Tsay, Frank
Wells
Above ground apparatus
Fluid catcher around pipe coupling
175215, E21B 3302
Patent
active
061197726
ABSTRACT:
Apparatus and methods are disclosed for maintaining drilling fluid circulation while attaching joints of pipe to a drill string during the operation of drilling a well borehole. A chamber is clamped over a thread joint connecting two joints of drill string pipe. An inlet valve is opened to flow drilling fluid into the chamber under pressure. The thread joint is then broken, the chamber is partitioned with a ram thereby forming an upper and lower sub chambers, and drilling fluid circulation is continued through the lower sub chamber and down the borehole through the drill string. The thread joint of another joint of drill string to be added is positioned in the upper sub chamber, pressure is equalized between the upper and lower sub chambers, the ram is opened, the thread joint is made, and drilling fluid is reestablished through the drill string without interruption.
REFERENCES:
patent: 2214429 (1940-09-01), Miller
patent: 2224657 (1940-12-01), Rodgers
patent: 2505282 (1950-04-01), Endsley
patent: 2522444 (1950-09-01), Grable
patent: 2610690 (1952-09-01), Beatty
patent: 3559739 (1971-02-01), Hutchison
patent: 4315553 (1982-02-01), Stallings
patent: 5857518 (1999-01-01), Vinson, Sr.
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