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121.发明授权公开(公告)号：US11320474B2
公开(公告)日：2022-05-03
申请号：US17344895
申请日：2021-06-10
Applicant: Merlin Technology Inc.
Inventor： Loc Viet Lam , Albert W. Chau
Abstract: A portable device is described for use with a system in which a transmitter signal is transmitted by a transmitter from within the ground during an operational procedure. The transmitter signal includes a transmission frequency that is selectable as one of a group of discrete transmission frequencies and the region includes electromagnetic noise that varies. The portable device includes a receiver that measures noise continuously along a path, with the transmitter inactive, to generate one or more indications for each discrete frequency at each location and continuously update the one or more indications for use in selecting one of the discrete frequencies as a selected transmission frequency to avoid local interference.
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公开(公告)号：US20220106872A1
公开(公告)日：2022-04-07
申请号：US17552226
申请日：2021-12-15
Applicant: Merlin Technology, Inc.
Inventor： Rudolf Zeller , Gary Garrabrant , Timothy Bayliss , John E. Mercer
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.
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123.发明申请公开(公告)号：US20220099700A1
公开(公告)日：2022-03-31
申请号：US17546850
申请日：2021-12-09
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , John E. Mercer , Scott Phillips
Abstract: An accelerometer arrangement and method are described for determining accelerations of an inground tool. First and second triaxial accelerometers are supported such that a normal sensing axis of the first triaxial accelerometer is at least generally orthogonal to the normal sensing axis of the second triaxial accelerometer for determining the accelerations along the three orthogonal axes based on a combination of sensing axis outputs from one or both of the triaxial accelerometers. A weaker sensing axis of one triaxial accelerometer can be supported at least approximately normal to a weaker sensing axis of another triaxial accelerometer such that the weaker axes are not used. The triaxial accelerometers can be supported such that one axis of one accelerometer can be redundant with respect to another axis of another accelerometer. One triaxial accelerometer can be mounted on a tilted plane with respect to another triaxial accelerometer.
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124.发明申请公开(公告)号：US20210302485A1
公开(公告)日：2021-09-30
申请号：US17344895
申请日：2021-06-10
Applicant: Merlin Technology Inc.
Inventor： Loc Viet Lam , Albert W. Chau
Abstract: A portable device and associated method are described for use with a system in which a locating signal is transmitted from within the ground during an operational procedure. The locating signal includes a transmission frequency that is selectable from a group of discrete transmission frequencies in a frequency range and the region includes electromagnetic noise that can vary. The portable device includes a receiver having a bandwidth that includes the transmission frequency range and is operable for measuring the electromagnetic noise in the transmission frequency range to establish a frequency content of the electromagnetic noise for use in selecting one of the discrete transmission frequencies that is subsequently transmitted as the locating signal during the operational procedure. The locating signal can be transmitted from a boring tool, a pullback arrangement or an inground cable. A predicted maximum operational depth for a transmitter can be determined prior to the operational procedure.
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公开(公告)号：US11105161B2
公开(公告)日：2021-08-31
申请号：US16600352
申请日：2019-10-11
Applicant: Merlin Technology Inc.
Inventor： Albert W. Chau , Benjamin John Medeiros
IPC: E21B17/02 , E21B17/00 , E21B7/04 , E21B7/30 , E21B47/0232 , E21B17/042
Abstract: A coupling adapter is insertable in at least one joint of a drill string as the drill string is extended from a drill rig. The coupling adapter includes an arrangement for receiving a data signal that is generated by an inground tool and for electromagnetically coupling the data signal onto at least a portion of the drill string that extends from the adapter to the drill rig such that at least some of the drill pipe sections cooperate as an electrical conductor for carrying the data signal to the drill rig. In another feature, a current transformer is resiliently supported to isolate the current transformer from mechanical shock and vibration that is produced by an inground operation that is performed using the drill string. In another feature, a drill string repeater is described.
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Patent Agency Ranking
126.发明申请公开(公告)号：US20210179264A1
公开(公告)日：2021-06-17
申请号：US17176864
申请日：2021-02-16
Applicant: Merlin Technology, Inc.
Inventor： Mark Marvin , John E. Mercer , Derek Vetter
Abstract: An emergency collective actuator includes an actuator motor to produce an actuation force and an actuator linkage that directly engages a friction control lever that is pivotally supported on the collective stick of a helicopter to apply the actuation force directly to the friction control lever such that the actuation force initially disengages the friction control and then reduces the adjustable pitch toward a minimum collective pitch position. The actuator can include a clutch that slips to allow the pilot to overcome the actuation force and that slips responsive to an engagement of the friction control by the pilot, but otherwise the clutch co-rotates with the motor shaft to bias the adjustable pitch toward a minimum collective pitch position.
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公开(公告)号：US11035221B2
公开(公告)日：2021-06-15
申请号：US16450778
申请日：2019-06-24
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , Kenneth J. Theimer
IPC: E21B47/013 , E21B47/017 , E21B47/01 , E21B17/00 , E21B47/024 , E21B7/04
Abstract: A housing defines a through passage along its length and is configured to support a group of electrical isolators surrounding the through passage to form an electrically isolating break in a drill string such that each isolator of the group of isolators is subject to no more than a compressive force responsive to extension and retraction of the drill string. The housing defines a housing cavity to receive an electronics package having a signal port and is configured for electrical connection of the signal port across the electrically isolating break. A housing lid can cooperate with a main housing body to define elongated slots for purposes of enhancing the emanation of a locating signal. A housing arrangement can support electrical connections from an electronics package to bridge an electrically isolating gap.
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公开(公告)号：US20210140304A1
公开(公告)日：2021-05-13
申请号：US17151612
申请日：2021-01-18
Applicant: Merlin Technology Inc.
Inventor： Guenter W. Brune , John E. Mercer , Albert W. Chau
IPC: E21B47/024 , E21B47/0232 , E21B7/04 , E21B44/00
Abstract: A boring tool that is moved by a drill string to form an underground bore. A transmitter transmits a time varying dipole field as a homing field from the boring tool. A pitch sensor detects a pitch orientation of the boring tool. A homing receiver is positionable at a target location for detecting the homing field to produce a set of flux measurements. A processing arrangement uses the pitch orientation and flux measurements with a determined length of the drill string to determine a vertical homing command for use in controlling depth in directing the boring tool to the target location such that the vertical homing command is generated with a particular accuracy at a given range between the transmitter and the homing receiver and which would otherwise be generated with the particular accuracy for a standard range, different from the particular range. An associated system and method are described.
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129.发明授权公开(公告)号：US10919622B2
公开(公告)日：2021-02-16
申请号：US15926972
申请日：2018-03-20
Applicant: Merlin Technology, Inc.
Inventor： Mark Marvin , John E. Mercer , Derek Vetter
Abstract: An emergency collective actuator includes an actuator motor to produce an actuation force and an actuator linkage that directly engages a friction control lever that is pivotally supported on the collective stick of a helicopter to apply the actuation force directly to the friction control lever such that the actuation force initially disengages the friction control and then reduces the adjustable pitch toward a minimum collective pitch position. The actuator can include a clutch that slips to allow the pilot to overcome the actuation force and that slips responsive to an engagement of the friction control by the pilot, but otherwise the clutch co-rotates with the motor shaft to bias the adjustable pitch toward a minimum collective pitch position.
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公开(公告)号：US20210025273A1
公开(公告)日：2021-01-28
申请号：US16520182
申请日：2019-07-23
Applicant: Merlin Technology, Inc.
Inventor： Rudolf Zeller , Timothy Shaw , Timothy Bayliss , Craig Caswell
IPC: E21B47/024 , E21B7/04 , G01B3/12 , G01S19/13 , G01S19/49
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.
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