公开(公告)号：WO2021016376A1

公开(公告)日：2021-01-28

申请号：PCT/US2020/043114

申请日：2020-07-22

Applicant: MERLIN TECHNOLOGY, INC.

Inventor： ZELLER, Rudolf ,  SHAW, Timothy ,  BAYLISS, Timothy ,  CASWELL, Craig

IPC: E21B17/02 ,  E21B7/02 ,  E21B17/00 ,  E21B47/02

Abstract: A planning tool plans movement of a boring tool for an underground drilling operation. The planning tool includes one or more wheels for rolling on a surface of the ground along a path responsive to movement by an operator to characterize the surface contour and to generate guidance for the boring tool to reach a target position. Planning can additionally be based on waypoints. The planning tool can be rolled unidirectionally or bidirectionally to characterize the surface contour. Bidirectional movement cancels accelerometer fixed bias. Path stitching is used to plan around obstacles. The planning tool can facilitate tracker placement. The planning tool can collect noise information for frequency selection purposes. A described technique maximizes linear drilling in an underground plan. Compensation and/or warnings are provided for unsteady, fast and slow movement of the planning tool while measuring the surface contour.

公开(公告)号：WO2019005343A1

公开(公告)日：2019-01-03

申请号：PCT/US2018/034207

申请日：2018-05-23

Applicant: MERLIN TECHNOLOGY, INC.

Inventor： ZELLER, Rudolf ,  GARRABRANT, Gary ,  BAYLISS, Timothy ,  PHILLIPS, Scott

IPC: E21B47/12

Abstract: A transmitter for inground use controls a depth signal transmit power in relation to a data signal transmit power such that one reception range of the depth signal at least approximately matches another, different reception range of the data signal. A portable device can form a system with the transmitter in which the portable device scans a plurality of frequencies within at least one low frequency depth signal range to measure the electromagnetic noise at each one of the plurality of frequencies and identify at least one of the frequencies as a potential depth frequency for the transmitter. The portable device can include a dual mode filter having a rebar mode and a normal mode filter. The depth signal frequency is dynamically positionable in relation to low frequency noise.

公开(公告)号：WO2016037135A1

公开(公告)日：2016-03-10

申请号：PCT/US2015/048692

申请日：2015-09-04

Applicant: MERLIN TECHNOLOGY, INC.

Inventor： ZELLER, Rudolf ,  GARRABRANT, Gary ,  BAYLISS, Timothy ,  MERCER, John E.

IPC: E21B47/12 ,  E21B47/024 ,  E21B47/13 ,  E21B7/04 ,  H04B1/02 ,  H04B1/06 ,  H04B13/02

CPC classification number: E21B47/122 ,  E21B7/046 ,  G01S11/06

Abstract: A system includes a transmitter for use in conjunction with a horizontal directional drilling system that transmits a multi-bit symbol stream that characterizes sensor symbols for receipt by an aboveground portable device. The portable device receives the symbol stream for aboveground recovery of the sensor signals. The transmitter can precisely place the symbol frequencies at least to avoid a noise environment, as well as to avoid powerline harmonics, and can utilize wave shaping for transmitted symbols at least to provide for transmission power control, spectral content control and wideband antenna matching. The receiver can measure the noise environment to identify the symbol frequencies used by the transmitter. The noise can be scanned at an incremental resolution across a wide frequency bandwidth for display or automatic symbol frequency selection.

Abstract translation: 一种系统包括与水平定向钻井系统一起使用的发射机，其传输表征传感器符号的多比特符号流，以便由地上便携式设备接收。 便携式设备接收用于传感器信号的地面恢复的符号流。 发射机可以至少精确地将符号频率放置到避免噪声环境以及避免电力线谐波，并且可以利用发射符号的波形整形来至少提供传输功率控制，频谱内容控制和宽带天线匹配。 接收机可以测量噪声环境，以识别发射机使用的符号频率。 可以在宽频带宽度上以增量分辨率扫描噪声，以进行显示或自动符号频率选择。