Smith International, Inc.

Jonan Fulenchek

Gregory Thomas Lockwood

Youhe Zhang

Yuelin Shen

Yuri Y Burhan

Bala Durairajan

Jiaqing Yu

A drill bit that includes a body having a lower end face for engaging a rock formation, the end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween; and at least one of the plurality of ribs having a cutting portion of the at least one rib comprising a first diamond impregnated matrix material and at least a portion of a gage surface region thereof comprising a second diamond impregnated matrix material, the gage surface region backed by a third matrix material is disclosed.

Diamond impregnated bits and method of using and manufacturing the same

A cutting element has a sleeve with a first inner diameter and a second inner diameter, where the second inner diameter is larger than the first inner diameter and located at a lower axial position than the first inner diameter. A rotatable cutting element having an axis of rotation extending therethrough is at least partially disposed within the sleeve. The rotatable cutting element has a cutting face and a body extending axially downward from the cutting face, at least one hole extending from an outer surface of the body toward the axis of rotation, and a locking device disposed in each hole. The locking device protrudes from the hole to contact the second inner diameter of the sleeve, thereby retaining the rotatable cutting element within the sleeve.

Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s)

A drill bit that includes a body having a lower end face for engaging a rock formation. The end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween At least one of the plurality of ribs has a varying width along at least a portion of a rib height.

Impregnated drill bit

A drill bit has a matrix bit body with a lower end face for engaging a rock formation, wherein the end face has a plurality of raised impregnated ribs extending from the face of the bit body and separated by a plurality of channels therebetween. At least one of the plurality of ribs has a leading or trailing portion thereof comprising the same the matrix material as the bit body forming a continuous body matrix.

Impregnated drill bits and methods of manufacturing the same

A drill bit that includes a body having a lower end face for engaging a rock formation is disclosed. The end face has a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween. At least one of the plurality of ribs has a leading portion and a trailing portion, the leading portion comprising a first matrix material impregnated with super abrasive particles and the trailing portion comprising a second matrix material impregnated with super abrasive particles, wherein the first and second matrix materials differ from each other.

Growing community of inventors

Tomball, TX, United States of America

Jonan Fulenchek