Baker Hughes Corporation

Baker Hughes, a Ge Compnay, LLC

Baker Hughes Holdings LLC

Ulterra Drilling Technologies, L.p.

Mitchell A Rothe

Rudolf Carl Pessier

Gregory Prevost

Anton F Zahradnik

Chaitanya K Vempati

Don Quy Nguyen

Robert J Buske

Michael Steven Damschen

Karlos B Cepeda

John F Bradford

Johnathan Walter Howard

Gregory L Ricks

Floyd C Felderhoff

Nathaniel R Adams

Ben Chrest

Kendrick D McGee

Mitchell F Marks

Karlos Cepeda

Michael S Damschen

Rolf C Pessier

Johnathan Howard

A hybrid rotary drill bit having at least one fixed blade and at least one rolling cutter assembly is configured for reverse fluid flow from an annulus, through junk slots and into a fluid pathway system located substantially centrally to a bit body. The fluid pathway system may be located underneath a portion of the at least one fixed blade.

Reverse circulation hybrid bit

A bladeless polycrystalline diamond compact (PDC) drill bit includes a head having a plurality of knots protruding from a drilling face of the head. Each of the plurality of knots includes a single cutter. Each of the cutters is arranged about a central axis of the head such that each cutter has a unique radial position and angular position relative to the central axis. The head defines at least one fluid port extending through the drilling surface.

No blade bit

An earth-boring tool includes a body, at least one blade, and at least one rotatable cutting structure. The blade extends axially from the body and extends radially outward from a center longitudinal axis of the earth-boring tool to less than an outer diameter of the earth-boring tool. The blade defines a first cutting profile. The at least one rotatable cutting structure assembly is coupled to the body and includes a leg extending axially from the body and a rotatable cutting structure rotatably coupled to the leg. The rotatable cutting structure defines a second cutting profile extending to the outer diameter of the earth-boring tool. The first cutting profile overlaps with the second cutting profile in a radial direction in an amount that is less than 20% of the outer diameter of the earth-boring tool. A method of making an earth-boring tool.

Earth-boring tools having fixed blades and rotatable cutting structures and related methods

Reamer for earth-boring applications may include a body having a longitudinal axis and a blade carried by the body. The blade may include at least one cutting element located at a first radial distance from the longitudinal axis and a gage pad located at a second, smaller radial distance from the longitudinal axis. Methods of enlarging pilot holes in earth formations utilizing reamers may involve removing earth material from a sidewall of the pilot hole utilizing at least one cutting element located at a first radial distance from a longitudinal axis of a body of the reamer on a blade of a reamer. The reamer may be stabilized by placing a gage pad located on the blade in sliding contact with a portion of the sidewall of the pilot hole, the gage pad located at a second, smaller radial distance from the longitudinal axis.

Reamers for earth-boring applications having increased stability and related methods

An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from a center of the bit outward toward a gage region of the bit but do not include a gage cutting region, and wherein at least one roller-cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, an apex of the roller-cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.

Hybrid drill bits having increased drilling efficiency

An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from a center of the bit outward toward a gage region of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, an apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.

Hybrid drill bits

An earth boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drillstring; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from the center of the bit outward toward the gage of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, the apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.

Growing community of inventors

Spring, TX, United States of America

Mitchell A Rothe