Cnpc USA Corporation

Beijing Huamei Inc.

China National Petroleum Corporation

Kevin Waddell

Chris X Cheng

Xiongwen Yang

Jiaqing Yu

Chi Ma

Jinjun Wang

Xin Zhang

Xu Wang

Xu Zhao

Yanping Zhang

Yong Luo

Jayson Byrd

Qi Peng

Xiaohua Ke

Weixiong Wang

Fuxiang Hou

David He

Tito Zabala

Hems Mada

Ning Li

Ming Yi

The present invention is a hydraulic control apparatus that activates and deactivates a downhole tool, such as a reamer, at a desired downhole location in a borehole. The apparatus includes a piston, a housing, a coil spring, and a guide pin. The piston has a cam portion with a continuous slotted groove. There is a slide member and a force member within the slotted groove so that the piston moves longitudinally and rotationally within the housing according to the guide pin within the slotted groove. At the desired downhole location, drilling fluid pressure passes a pressure threshold to move a front outlet of the piston to an opened position past an end of the housing, while rotating the piston according to the slide member and force member in the slotted groove. The apparatus alternately extends and retracts the reamer by opening and closing the front outlet by hydraulic control.

Hydraulic control apparatus and method for a downhole tool

The drilling system withstands downhole conditions at the bottom of the borehole and drilling conditions due to the constant movement and vibration. The drilling system includes a drill bit and a sensor system with a system housing, a primary power supply and interior sensor. The primary power supply includes piezoelectric panels for converting radial vibration into energy. The interior sensor is locally powered by the primary power supply at the remote downhole location at the bottom of the borehole. The interior sensor collects data related to a downhole condition and is in communication with the primary power supply to generate confirmed data based on the amount of energy generated by the primary power supply. The confirmed data is more accurate and reliable than the data collected by the interior sensor and can be used to guide the path of the drill bit through the rock formation in drilling operations.

Sensor system with an interior sensor and a piezoelectric power supply

A drill bit for cutting formation comprises a bit body, a plurality of cutters, and a plurality of blades with pockets to accommodate the cutters, respectively. In an embodiment, the plurality of cutters comprise a substrate, an ultra-hard layer, a concave surface on the top of the ultra-hard layer, wherein the concave surface comprises a plurality of planar and curved surfaces.

Cutting elements with reduced variable back rake angle

Growing community of inventors

HOUSTON, TX, United States of America

Kevin Waddell