Percussive Drill String Assemblies And Systems And Methods Of Using Same
AssigneeBly IP Inc.
InventorsJEFFREY HOGAN, CHRISTOPHER L. DRENTH, TUSHAR MATKAR
Life of this patent
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Abstract
A percussive drill string assembly including a drill bit and a drill rod. The drill bit has a body having: a circumferential wall; a crown extending distally from the circumferential wall; and a threaded portion extending proximally from the circumferential wall. The threaded portion has an outer surface that defines at least one thread having a tapered thread profile. The drill rod has a box end portion having an inner surface that defines: a receptacle configured to receive the threaded portion of the bit; and at least one thread having a tapered profile complementary to the tapered thread profile of the threaded portion of the bit.
Claims21
A single-rod percussive drill string assembly having a longitudinal axis and comprising:
- a drill bit having:
- a body having:
- a circumferential wall;
- and
- a crown extending distally from the circumferential wall;
- and
- a threaded portion extending proximally from the circumferential wall, wherein the threaded portion has an outer surface that defines at least one thread having a tapered thread profile;
- and
- a drill rod having:
- a box end portion having an inner surface that defines:
- a receptacle configured to receive the threaded portion of the bit;
- and
- at least one thread having a tapered profile complementary to the tapered thread profile of the threaded portion of the bit,
- wherein the drill rod is the only drill rod of the percussive drill string assembly.
A drilling method comprising:
- penetrating a formation using a single-rod percussive drill string assembly having a longitudinal axis and comprising:
- a drill bit having:
- a body having:
- a circumferential wall;
- and
- a crown extending distally from the circumferential wall;
- and
- a threaded portion extending proximally from the circumferential wall, wherein the threaded portion has an outer surface that defines at least one thread having a tapered thread profile;
- and
- a drill rod having:
- a box end portion having an inner surface that defines:
- a receptacle configured to receive the threaded portion of the bit;
- and
- at least one thread having a tapered profile complementary to the tapered thread profile of the threaded portion of the bit
- wherein the drill rod is the only drill rod of the percussive drill string assembly.
Dependencies are inferred from the claim text.