Deviated wellbore drilling system and apparatus

Patent · Tue Jun 11 00:00:00 EDT 1991

OSTI ID:5873577

Maurer, W C; McDonald, W J

This patent describes a system of apparatus for the drilling of a deviated wellbore into the earth. It comprises a drill string extending into a well bore in the earth, a fluid operated drill motor and drill bit operatively secured on the bottom end of the drill string, the drill motor being connected at its upper end to the drill string and at its lower end to the drill bit for rotating the drill bit independently of rotation of the drill string, the drill motor having a tubular drive section housing with the longitudinal axis of its upper end angularly displaced from the longitudinal axis of its lower end for directing the axis of rotation of the drill bit such that is angularly displaced from the axis of the drill string for effecting a curved path for the wellbore, the motor comprises a rubber stator in the housing and a steel rotor rotatable therein, the stator fits the angular configuration of the housing, and the drill motor drive section housing directs the axis of the drill bit to effect a curved path having a radius of curvature of from approximately 10 to approximately 1,000 feet relative to a vertical or near vertical wellbore, the flexibility of the rotor and compressibility of the stator permitting rotation of the rotor without undue binding.

• Assignee: Maurer Engineering, Inc., Houston, TX (United States)
• Patent Number(s): US 5022471; A
• Application Number: PPN: US 7-461741
• OSTI ID: 5873577
• Resource Relation: Patent File Date: 8 Jan 1990
• Country of Publication: United States
• Language: English

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