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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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公开(公告)号：US20190226316A1
公开(公告)日：2019-07-25
申请号：US16370702
申请日：2019-03-29
Applicant: Merlin Technology Inc.
Inventor： James W. Burrows , Guenter W. Brune , John E. Mercer
IPC: E21B44/00 , E21B7/10 , E21B7/04 , E21B47/024 , E21B47/022
Abstract: A boring tool moves having a pitch orientation, a yaw orientation and a roll orientation and is steerable underground using the roll orientation. A maximum drill string curvature is established for steering. The boring tool is advanced over a path segment. An averaged roll characteristic is determined for movement of the boring tool along the path segment. A path segment pitch orientation is established based on at least one measured pitch orientation along the path segment. Using the maximum drill string curvature in combination with the averaged roll characteristic and the path segment pitch orientation, the yaw orientation is determined. The averaged roll characteristic is determined based on a series of incremental roll measurements that are spaced across the path segment. A set of coupled ordinary differential equations is used to characterize movement of the boring tool.
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公开(公告)号：US10281347B2
公开(公告)日：2019-05-07
申请号：US15719239
申请日：2017-09-28
Applicant: Merlin Technology Inc.
Inventor： Albert W. Chau , Rudolf Zeller , John E. Mercer , Charles Yu Yat Tsang
Abstract: A tension monitoring apparatus is used for installing an underground utility by retraction that is applied to the utility. The tension monitoring apparatus includes a sensor for inground sensing of the tension force that is applied to the utility to produce a sensor signal. A processor monitors the tension force in a series of measurement intervals such that a plurality of tension force readings is generated for each of the measurement intervals. The processor stores a data set including a maximum tension force selected from the plurality of tension force readings for each one of the measurement intervals and copies the data set to a different location to create a copied data set after installation of the utility for subsequent selection and presentation of an overall maximum tension force.
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Patent Agency Ranking
公开(公告)号：US20190127057A1
公开(公告)日：2019-05-02
申请号：US16137318
申请日：2018-09-20
Applicant: Merlin Technology Inc.
Inventor： John E. Mercer , Mark H. Marvin
Abstract: A helicopter includes a rotor system having a rotor with an adjustable pitch that is controlled at least in part by a pilot using a collective control and which helicopter generates a Low RPM signal that is indicative of a threshold low rotational speed of the rotor. An actuator arrangement can move the collective control by exerting a force on the collective control such that the pilot is able to overcome the actuator force but which otherwise can move the collective control from a current operational position toward a minimum pitch position. A clutch can co-rotate with a motor to serve in transferring the actuation force to reduce the adjustable pitch and can slip relative to the actuator shaft assembly responsive to an application of a counterforce applied by the pilot to the collective control such that the counterforce overcomes the actuation force.
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公开(公告)号：US10273796B2
公开(公告)日：2019-04-30
申请号：US15720865
申请日：2017-09-29
Applicant: Merlin Technology Inc.
Inventor： Guenter W. Brune , Albert W. Chau , Rudolf Zeller , John E. Mercer
IPC: G01V3/08 , E21B7/04 , E21B44/02 , G01V3/15 , E21B47/022
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：US10072489B2
公开(公告)日：2018-09-11
申请号：US15231782
申请日：2016-08-09
Applicant: Merlin Technology, Inc.
Inventor： Albert W. Chau , Scott Phillips , Benjamin J. Medeiros
IPC: E21B44/00 , H02J17/00 , H02J1/00 , H02J50/80 , E21B47/01 , E21B47/09 , E21B47/12 , E21B7/04 , E21B41/00 , E21B47/024
CPC classification number: E21B44/005 , E21B7/046 , E21B41/00 , E21B47/01 , E21B47/024 , E21B47/09 , E21B47/121 , E21B47/122 , H02J1/00 , H02J17/00 , H02J50/80
Abstract: A transmitter is powered by a regulated battery voltage and is installable in one of a plurality of different housings, each housing is characterized by a different design and each can form part of an inground tool for performing an inground operation in which a drill string extends from a drill rig to the inground tool. An antenna driver drives an antenna based on the regulated voltage to emanate an electromagnetic signal for remote reception. A controller limits power consumption from the regulated voltage so as not to exceed a power consumption threshold, irrespective of installation of the transmitter in any one of the housings when the transmitter would otherwise exhibit a different power consumption for each housing design. A corresponding method is described. Features relating to power consumption threshold modification based on temperature as well as mechanical shock and vibration are described.
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公开(公告)号：US20180038982A1
公开(公告)日：2018-02-08
申请号：US15785986
申请日：2017-10-17
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：US09810053B2
公开(公告)日：2017-11-07
申请号：US15187917
申请日：2016-06-21
Applicant: Merlin Technology Inc.
Inventor： John E. Mercer
IPC: E21B47/024 , E21B44/00 , E21B7/04 , E21B7/06 , E21B47/022 , E21B47/12
CPC classification number: E21B44/005 , E21B7/046 , E21B7/06 , E21B7/068 , E21B44/00 , E21B47/02224 , E21B47/024 , E21B47/122
Abstract: A drilling system performs underground boring using a drill rig and a boring tool which is configured for moving through the ground under control of the drill rig to form an underground bore. A monitoring arrangement, forming part of the system, includes a detection arrangement at the drill rig for monitoring at least one operational parameter to produce a data signal relating to at least one of a utility to be installed in the underground bore, the drill rig and the boring tool. A portable device forms another part of the system for receiving the data signal relating to the operational parameter for use by the portable device. A communication arrangement, for example using telemetry, transfers the data signal from the drill rig to the portable device. The operational parameter may be monitored for the purpose of preventing equipment failure.
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