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Downhole drilling assembly orienting device

Patent ·
OSTI ID:6998161
;
This patent describes a method for indicating at the earth's surface when a steering assembly connected to a drill string located in a wellbore is in a preselected orientation with respect to the earth. It comprises: pumping drilling fluid down the drill string while rotating the drill string in a first direction; and changing resistance to the flow of the drill fluid in the drill string to create a constant increase in said resistance to indicate that the steering assembly is in a preselected orientation relative to the earth. Also described is an apparatus for indicating at the earth's surface when a downhole steering assembly connected to a drill string is in a given orientation relative to the earth.
Assignee:
Amoco Corp., Chicago, IL
Patent Number(s):
US 4899833; A
Application Number:
PPN: US 7-281293A
OSTI ID:
6998161
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL EQUIPMENT
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
DRILLS
EQUIPMENT
FLUIDS
NATURAL GAS WELLS
ORIENTATION
PIPES
ROTARY DRILLING
ROTARY DRILLS
WELLS