公开(公告)号：WO2015057773A1

公开(公告)日：2015-04-23

申请号：PCT/US2014/060593

申请日：2014-10-15

Applicant: SMITH INTERNATIONAL, INC.

Inventor： TEDESCHI, Luca ,  PORTWOOD, Gary ,  ZHANG, Zhehua

IPC: E21B10/08 ,  G06F17/50

CPC classification number: E21B10/083

Abstract: A method including of manufacturing a drill bit includes inputting bit characteristics into a simulator. The bit characteristics may include a drill bit mass, coordinates of the bit center of gravity, and an inertia tensor of the bit. The bit center of gravity and a vector of the inertia tensor may be aligned with a bit axis in the simulator. Based on the alignment of the center of gravity and the inertia tensor with the bit axis, new bit characteristics may be determined. A drill bit with the new bit characteristics may be produced.

Abstract translation: 包括制造钻头的方法包括将钻头特性输入到模拟器中。 钻头特性可以包括钻头质量，钻头重心的坐标和钻头的惯性张量。 比特重心和惯性张量的向量可以与模拟器中的位轴对齐。 基于重心和惯性张量与位轴的对准，可以确定新的位特性。 可能产生具有新位特性的钻头。

公开(公告)号：WO2019226505A1

公开(公告)日：2019-11-28

申请号：PCT/US2019/033035

申请日：2019-05-20

Applicant: SMITH INTERNATIONAL, INC.

Inventor： PORTWOOD, Gary R. ,  TEDESCHI, Luca ,  BERTINI, Alessandro ,  PALLESI, Simone ,  OBERMAIR, Johann ,  LARSEN, James Layne ,  CECHI, Alessio

IPC: E21B10/60 ,  E21B17/18 ,  E21B41/00

Abstract: A cutting bit includes a bit body and high-pressure body with a high-pressure fluid conduit therethrough. The high-pressure body and bit body are joined together. The high-pressure fluid conduit is configured to convey a fluid at greater than 14.5 ksi, and in some embodiments greater than 40 ksi. The high-pressure fluid conduit may direct the fluid through a nozzle in a fluid jet to weaken material, such as an earth formation. The cutting bit includes at least one roller cone and/or blades with cutting elements thereon to remove the weakened material. A cutting bit includes both high and low-pressure fluid conduits, and high and low-pressure fluid nozzles. The high-pressure nozzles receive fluid flow from a downhole pressure intensifier, and a connection between the bit and the downhole pressure intensifier includes rigid connectors, flexible connectors, or a combination thereof.