Rotary drilling apparatus and method

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 th...

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Bibliographic Details
Main Author DAVIS; HAGGAI D
Format Patent
LanguageEnglish
Published 16.03.1976
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary: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.
Bibliography:Application Number: US19740531903