Cnpc USA Corporation

China National Petroleum Corporation

Beijing Huamei Inc.

Hongtao Liu

Xu Wang

Chris X Cheng

Xiongwen Yang

Marvin Allen Gregory

Jianpeng Yue

Zhenzhou Yang

Javier Davila

Xiangtong Yang

Yuxin Wang

The present disclosure provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth comprises a base, a table connected to a top of the base. a concave shaped surface on the center portion of a top surface of the table; three cutting ridges with each extending from a vertex of the concave shaped surface to an outer edge of the top surface; three cutting bevels with each locating between two cutting ridges of the three cutting ridges; each of the three cutting ridges has a fillet.

Polycrystalline diamond cutter with improved geometry for cooling and cutting evacuation and efficiency and durability

A millable bridge plug system includes a mandrel having an upper portion and a lower portion with an interlock, a shearing member attached at the upper portion, a sealing member, ring members, cone assemblies, slip devices, and an interlocking drill member at a lower portion of the mandrel. The interlock of the mandrel and the interlocking drill member are modular so that one bridge plug interchangeably connects to another bridge plug. The interlocks are compatible with interlocking drill members of other bridge plugs and vice versa. The interlocking drill member has rotatable cutting blades to drill through sand and other debris between the interlocking drill member and the next bridge plug to be removed. A milling unit can drive rotation of the interlocking drill member to reach the next bridge plug for removal, until the interlocking drill member engages the adjacent interlock of the next bridge plug to be removed.

Millable bridge plug system

Growing community of inventors

Xinjiang, China

Hongtao Liu