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公开(公告)号：US20240287894A1
公开(公告)日：2024-08-29
申请号：US18655324
申请日：2024-05-06
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , Loc Viet Lam
IPC: E21B47/12 , E21B7/04 , E21B7/30 , E21B47/095 , E21B47/125 , G01V3/30
CPC classification number: E21B47/12 , E21B7/046 , E21B7/30 , E21B47/095 , E21B47/125 , G01V3/30
Abstract: A drill string communication system is described. An uphole transceiver can couple a signal onto the drill string at a power that is always greater that a selectable power for a downhole signal. Communication from a drill rig to an inground tool can be re-initiated using a maximum uphole transmit power of an uphole transceiver. A procedure can establish a new set of transmission parameters for a drill string signal to establish communication between the drill rig and the inground tool. The system can include a walkover locator that receives an active/inactive status-controlled electromagnetic locating signal. Responsive to a locating signal degradation, a reconfiguration command can modify the locating signal. The uphole transceiver and a downhole transceiver can automatically modify at least one parameter of a downhole signal. An uphole receiver can apply a compensation response to a transferred signal to compensate for a drill string channel transfer function.
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公开(公告)号：US11906685B2
公开(公告)日：2024-02-20
申请号：US17157106
申请日：2021-01-25
Applicant: Merlin Technology Inc.
Inventor： John E. Mercer , Albert W. Chau
Abstract: Discriminating between a cable locating signal and a false cable locating signal is described. A reference signal, which contains a locating signal frequency impressed on it, is transmitted in a way which provides for detection of a phase shift between the locating signal and the false locating signal. Based on the phase shift, a receiver is used to distinguish the locating signal from the false locating signal.
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公开(公告)号：US11136881B2
公开(公告)日：2021-10-05
申请号：US13946611
申请日：2013-07-19
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , Benjamin John Medeiros , Craig Caswell
IPC: E21B47/13 , E21B47/024 , G01V3/18 , E21B21/08 , E21B47/12 , E21B44/00 , E21B7/04 , E21B47/02 , E21B47/06 , E21B47/10
Abstract: Systems, apparatus and methods are described for purposes of initiating a response to detection of an adverse operational condition involving a system including a drill rig and an inground tool. The response can be based on an uphole sensed parameter in combination with a downhole sensed parameter. The adverse operational condition can involve cross-bore detection, frac-out detection, excessive downhole pressure, a plugged jet indication and drill string key-holing detection. A communication system includes an inground communication link that allows bidirectional communication between a walkover detector and the drill rig via the inground tool. Monitoring of inground tool depth and/or lateral movement can be performed using techniques that approach integrated values. Bit force based auto-carving is described in the context of an automated procedure. Loss of locator to drill rig telemetry can trigger an automated switch to a different communication path within the system.
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公开(公告)号：US11015441B2
公开(公告)日：2021-05-25
申请号：US16298988
申请日：2019-03-11
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , Loc Viet Lam , Scott Phillips
IPC: E21B47/13 , E21B47/024 , E21B7/04
Abstract: A transmitter is carried proximate to an inground tool for sensing a plurality of operational parameters relating to the inground tool. The transmitter customizes a data signal to characterize one or more of the operational parameters for transmission from the inground tool based on the operational status of the inground tool. A receiver receives the data signal and recovers the operational parameters. Advanced data protocols are described. Pitch averaging and enhancement of dynamic pitch range for accelerometer readings are described based on monitoring mechanical shock and vibration of the inground tool.
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公开(公告)号：US11002623B2
公开(公告)日：2021-05-11
申请号：US16400771
申请日：2019-05-01
Applicant: Merlin Technology Inc.
Inventor： Albert W. Chau , Rudolf Zeller , John E. Mercer , Charles Yu Yat Tsang
Abstract: Tension monitoring is described using a sensor which may exhibit an offset for which compensation may be provided to produce a zero voltage amplified output or to increase dynamic range. An arrangement determines whether a power reset is responsive to a battery bounce such that an initially-measured system start-up parameter can be retained. The start-up parameter is automatically saved at start-up if the power reset is responsive to a start-up from a shut-down condition. The start-up parameter may be a zero tension amplified output responsive to the sensor offset at zero tension. Protection of a tension data set is provided such that no opportunity for altering the data set is presented prior to transfer of the data set. A housing configuration forms part of an electrical power circuit for providing electrical power to an electronics package from a battery.
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Patent Agency Ranking
公开(公告)号：US20210010828A1
公开(公告)日：2021-01-14
申请号：US17015680
申请日：2020-09-09
Applicant: Merlin Technology, Inc.
Inventor： Rudolf Zeller , Guenter W. Brune , Albert W. Chau , John E. Mercer
IPC: G01D5/20 , G01V3/08 , E21B47/0232 , G01V3/38
Abstract: A device rotates at least one static magnetic field about an axis, producing a rotating magnetic dipole field, and is movable in relation to the surface of the ground. The field is periodically sensed using a receiver to produce a receiver output responsive to the field. A positional relationship between the receiver and the device is monitored using the output. In one aspect, changing the positional relationship, by moving the device nearer to a boring tool which supports the receiver, causes an increase in accuracy of depth determination. In another aspect, determination of an actual overhead position of the boring tool, and its application, are described. Use of a plurality of measurements over at least one-half revolution of each magnet is disclosed. Establishing a surface radial direction toward a boring tool and resolution of multi-valued parameters is described. Calibration techniques, as well as a three transmitter configuration are also described.
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公开(公告)号：US10809099B2
公开(公告)日：2020-10-20
申请号：US16579795
申请日：2019-09-23
Applicant: Merlin Technology, Inc.
Inventor： Rudolf Zeller , Guenter W. Brune , Albert W. Chau , John E. Mercer
IPC: G01D5/20 , G01V3/38 , G01V3/08 , E21B47/022 , E21B47/0232
Abstract: A device rotates at least one static magnetic field about an axis, producing a rotating magnetic dipole field, and is movable in relation to the surface of the ground. The field is periodically sensed using a receiver to produce a receiver output responsive to the field. A positional relationship between the receiver and the device is monitored using the output. In one aspect, changing the positional relationship, by moving the device nearer to a boring tool which supports the receiver, causes an increase in accuracy of depth determination. In another aspect, determination of an actual overhead position of the boring tool, and its application, are described. Use of a plurality of measurements over at least one-half revolution of each magnet is disclosed. Establishing a surface radial direction toward a boring tool and resolution of multi-valued parameters is described. Calibration techniques, as well as a three transmitter configuration are also described.
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公开(公告)号：US20200165912A1
公开(公告)日：2020-05-28
申请号：US16775276
申请日：2020-01-29
Applicant: Merlin Technology Inc.
Inventor： Guenter W. Brune , Albert W. Chau , Rudolf Zeller , John E. Mercer
IPC: E21B44/02 , G01V3/15 , E21B47/022 , E21B7/04
Abstract: A steering tool is movable by a drill string to form an underground bore along an intended path. A sensing arrangement of the steering tool detects its pitch and yaw orientations at a series of spaced apart positions along the bore, each position is characterized by a measured extension of the drill string. The steering tool further includes a receiver. At least one marker is positioned proximate to the intended path, for transmitting a rotating dipole field to expose a portion of the intended path to the field for reception by the receiver. The detected pitch orientation, the detected yaw orientation and the measured extension of the drill string are used in conjunction with magnetic information from the receiver to locate the steering tool. The steering tool may automatically use the magnetic information when it is available. A customized overall position determination accuracy can be provided along the intended path.
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公开(公告)号：US20200040667A1
公开(公告)日：2020-02-06
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 , E21B47/022 , E21B7/04 , E21B7/30 , 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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公开(公告)号：US10513919B2
公开(公告)日：2019-12-24
申请号：US15006504
申请日：2016-01-26
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , Loc Viet Lam
Abstract: A drill string communication system is described. An uphole transceiver can couple a signal onto the drill string at a power that is always greater that a selectable power for a downhole signal. Communication from a drill rig to an inground tool can be re-initiated using a maximum uphole transmit power of an uphole transceiver. A procedure can establish a new set of transmission parameters for a drill string signal to establish communication between the drill rig and the inground tool. The system can include a walkover locator that receives an active/inactive status-controlled electromagnetic locating signal. Responsive to a locating signal degradation, a reconfiguration command can modify the locating signal. The uphole transceiver and a downhole transceiver can automatically modify at least one parameter of a downhole signal. An uphole receiver can apply a compensation response to a transferred signal to compensate for a drill string channel transfer function.
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