Three-dimensional steering tool for controlled downhole...

Details Three-dimensional steering tool for controlled downhole... Three-dimensional steering tool for controlled downhole...

2005-09-13

2005-09-13

Gray, Jennifer H (Department: 3672)

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

C175S026000, C175S074000, C166S255200

Reexamination Certificate

active

06942044

ABSTRACT:
A steering tool for extended-reach directional drilling in three dimensions comprises a mud pulse telemetry section, a rotary section, and a flex section assembled as an integrated system in series along the length of the tool. The flex section comprises a flexible drive shaft and a deflection actuator for applying hydraulic pressure along the length of the shaft for bending the shaft when making inclination angle adjustments during steering. The rotary section comprises a rotator housing coupled to the deflection housing for rotating the deflection housing for making azimuth angle adjustments during steering. The onboard mud pulse telemetry section receives inclination and azimuth angle steering commands together with actual inclination and azimuth angle feedback signals during steering for use in controlling operation of the flex section and rotary section for steering the tool along a desired course. The steering tool can change inclination and azimuth angles either simultaneously or incrementally while rotary drilling.

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