Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Patent
1994-07-05
1995-10-17
Schoeppel, Roger J.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Tool position direction or inclination measuring or...
175 61, 175 74, 175107, E21B 47022
Patent
active
054582083
ABSTRACT:
A method of directional drilling including the steps of affixing a bit, a motor housing, a MWD, and a sub to an end of a drillstring, forming a hole in the earth by rotating the bit as the drillstring lowers into the earth, actuating the sub such that the MWD is stationary as the drillstring rotates, and measuring a position of the bit as the MWD is stationary and as the drillstring rotates. The motor housing and the MWD are connected to the drillstring such that the MWD rotates in correspondence with the motor housing. The step of measuring includes measuring an inclination and an azimuth of the hole at the location of the MWD in the hole. A tool face orientation is adjusted relative to the position of the bit within the hole. The sub has a first portion connected to the drillstring and a second portion connected to the motor housing. The step of actuating includes indexing a gear member within the sub such that the first portion rotates independently of the second portion.
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