Underreamer cutter block
AssigneeSchlumberger Technology Corporation
InventorPhilip G. TRUNK
Life of this patent
Estimating the term…
Abstract
A downhole cutting apparatus includes a cutter block. The cutter block includes a formation facing surface with cutting elements coupled thereto. The cutting elements are arranged in rows that may extend at an angle across a width of the formation facing surface. Mud flutes may optionally be located between rows of cutting elements. A gauge portion of the formation facing surface may be adjacent a leading edge having reinforcement members coupled thereto.
Claims23
A cutting apparatus, comprising:
- a cutter block having a formation facing surface, a leading edge, and a trailing edge;
- and
- a plurality of cutting elements coupled to the formation facing surface of the cutter block, extending outwardly from the formation facing surface of the cutter block, and arranged in rows that are angled relative to the formation facing surface.
A cutting apparatus, comprising:
- a cutter block having:
- a formation facing surface;
- a leading edge;
- a trailing edge;
- and
- at least one mud flute in the formation facing surface and extending at least partially between the leading edge and the trailing edge;
- and
- a plurality of cutting elements coupled to the formation facing surface of the cutter block and extending in an angled row that is parallel to the at least one mud flute.
(canceled)
The apparatus of claim 23, the at least one reinforcement member being aligned with a gauge portion of the formation facing surface and including at least one diamond enhanced insert having a rounded top and at least one planar cutting element.
(canceled)
(canceled)
The apparatus of claim 23, the formation facing surface defining an underreaming portion, a backreaming portion, and a gauge pad between the underreaming portion and the backreaming portion, the at least three angled rows and the at least two angled mud flutes being located on the underreaming portion, and the plurality of cutting elements including at least two longitudinal rows of cutting elements that are about parallel to a longitudinal axis of the expandable cutter block.
A downhole cutting apparatus, comprising:
- an expandable cutter block having:
- a formation facing surface;
- leading and trailing edges on opposite sides of the formation facing surface;
- and
- a plurality of angled mud flutes in the formation facing surface and extending between the leading and trailing edges;
- a plurality of cutting elements coupled to the formation facing surface and arranged in at least three angled rows each including at least four non-planar cutting elements extending outwardly from the formation facing surface, at least two of the plurality of angled mud flutes being positioned between the at least three angled rows;
- and
- at least one reinforcement member coupled to the leading edge and aligned with a gauge portion of the formation facing surface.
Dependencies are inferred from the claim text.