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Double Bend Motor for Straight Performance Drilling With Sliding Correction Capability

IP.com Disclosure Number: IPCOM000240940D
Publication Date: 2015-Mar-12
Document File: 1 page(s) / 51K

Publishing Venue

The IP.com Prior Art Database

Abstract

Double bend motor for straight performance drilling with sliding correction capability. Key Benefit is that the new bit plus motor geometry is better suited for straight rotary drilling, which is the primary mode of operation, for example, in vertical section of US land shale plays. In rotating mode, the bit is aligned with the drilling direction, as opposed to conventional steerable motors where the bit is tilted towards the drilling direction in rotating mode. Sliding corrections are still possible.

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Title:

Double Bend Motor for Straight Performance Drilling With Sliding Correction Capability

Abstract:

Double bend motor for straight performance drilling with sliding correction capability.  Key Benefit is that the new bit plus motor geometry is better suited for straight rotary drilling, which is the primary mode of operation, for example, in vertical section of US land shale plays.  In rotating mode, the bit is aligned with the drilling direction, as opposed to conventional steerable motors where the bit is tilted towards the drilling direction in rotating mode.  Sliding corrections are still possible.

Description:

The motor could in principle also be used for directional drilling where the amount of sliding time is much higher than in straight drilling.  The sidecutting ability of this motor design needs to be evaluated.  It may be smaller than conventional directional motors sidecutting ability.  This is not a concern for straight or vertical drilling where only minor corrections are required.

The double bend can be achieved with various means like fixed bends, AKOs, DTUs or any other means that creates the required parallel offset between main motor section and lower drive shaft.

CONVENTIONAL DIRECTIONAL MOTOR WITH AKO

  • Sliding Operation
    • AKO motors are best suited for sliding operations, bit is aligned with the sliding drilling direction
  • Rotating Operation
    • Bit is misaligned when drilling straight in rotating mode
    • Bit offset is fairly large
    • This can poor hole quality, oversiz...