Rotary drilling apparatus and method

Details Rotary drilling apparatus and method Rotary drilling apparatus and method

1974-12-12

1976-03-16

Leppink, James A.

Wells

Processes

Cleaning or unloading well

134 15, 134151, 166 90, 175422, E21B 3700, E21B 3303, E21B 718

Patent

active

039439976

ABSTRACT:
A rotary drilling apparatus and method are disclosed in which well tools are washed as they are pulled from the well bore and large pieces of formation are broken into pieces small enough to pass through the mud return line by directing a plurality of streams of drilling mud against the tools and the pieces of formation as they pass through the bell nipple. The material washed off the tools and the pieces of the broken up larger pieces of formation are carried from the bell nipple laterally with the mud through the mud return line. A plurality of nozzles are mounted on the bell nipple for this purpose and each nozzle includes a flow restricting member that can be easily removed and replaced when it becomes fluid cut.

REFERENCES:
patent: 1521390 (1924-12-01), Reynolds
patent: 1566419 (1925-12-01), O'Neill et al.
patent: 2041394 (1936-05-01), Belcher
patent: 3763936 (1973-10-01), Menage

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