NL2032006B1 - A drill string drive to impart rotational power to a top end of drill string for drilling of a wellbore - Google Patents

A drill string drive to impart rotational power to a top end of drill string for drilling of a wellbore Download PDF

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Publication number
NL2032006B1
NL2032006B1 NL2032006A NL2032006A NL2032006B1 NL 2032006 B1 NL2032006 B1 NL 2032006B1 NL 2032006 A NL2032006 A NL 2032006A NL 2032006 A NL2032006 A NL 2032006A NL 2032006 B1 NL2032006 B1 NL 2032006B1
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Netherlands
Prior art keywords
drill string
drive
hydraulic
motor
drilling
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NL2032006A
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Dutch (nl)
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Alexander De Mul Arthur
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Itrec Bv
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Priority to NL2032006A priority Critical patent/NL2032006B1/en
Priority to PCT/EP2023/064012 priority patent/WO2023227704A1/en
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Publication of NL2032006B1 publication Critical patent/NL2032006B1/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • E21B3/022—Top drives

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

A drill string drive, e.g. a top drive, configured to impart rotational power to an upper end of drill string for drilling of a wellbore. The drive comprises one or more main drive motors and a 5 torsional vibrations reducing auxiliary hydraulic drive motor. A transmission couples the drive motors to a rotary torque output member of the drill string drive that is configured to be coupled to the drill string. The auxiliary hydraulic drive motor is a swash plate hydraulic motor. A controller assembly for the swash plate angle is configured to receive data related to the occurrence of torsional vibrations in the drill string and to control the swash plate 10 hydraulic motor so as to counter the torsional vibrations.

Description

P35755NL00
A DRILL STRING DRIVE TO IMPART ROTATIONAL POWER TO A TOP END OF DRILL
STRING FOR DRILLING OF A WELLBORE.
The present invention relates to the drilling of a wellbore, e.g. for drill hydrocarbon wells, geothermal wells, etc. For example, wellbore depth can exceed 500 metres, e.g. multiple kilometres.
When drilling a wellbore, in particular of significant depth so involving the use of a lengthy drill string that makes the drill bit at the lower end of the drill string rotate, a well-known cause of loss of drilling efficiency and downtime due to equipment failure, e.g. drill bit failure, is the occurrence of torsional vibrations in the drill string, e.g. induced by stick-slip while rotary drilling.
In the field, top drive devices are known that have one or more electric top drive motors, often electric motors with a variable frequency drive controller, e.g. digitally controlled. In order to reduce these undesirable torsional vibrations it is known to employ a so-called soft torque control system. Herein basically dedicated software is run on a computerized controller of the one or more electric top drive motors allowing to vary the speed of the one or more electric motors. For example, the relation between torque load on the top drive and the speed of the motors is actively controlled.
For example, reference is made to US9624762. Here the occurrence of torsional vibrations in the drill string induced by stick-slip is discussed, as well as various strategies to counter this undesirable phenomenon.
In US10927657 a top drive is disclosed wherein multiple electric drive motors are connected via a transmission to a rotary torque output member of the top drive that is coupled to the top end of the drill string. Each of the top drive motors has an operable clutch device configured to selectively connect and disconnect upon command the rotor relative to the transmission of the top drive. Use is made of a computerized electronic controller comprising a processor, and a program is executed by the processor so as to control the multiple electric top drive motors of the top drive device and to selectively control the clutch devices individually so as to selectively connect and disconnect the rotor of each top drive motor relative to the transmission by operating the respective clutch device and thereby varying and controlling said total inertial moment as a control parameter in order to reduce occurrence of drill string torsional vibration.
The present invention aims to provide an approach to counter torsional vibrations in the drill string that is highly effective and can be implemented in a compact and structurally attractive manner in a drill string drive.
According to the invention a drill string drive is provided that is configured to impart rotational power to an upper end of drill string for drilling of a wellbore, which drill string drive comprises: - one or more main drive motors, preferably one or more hydraulic main drive motors, - a torsional vibrations reducing auxiliary hydraulic drive motor, - a transmission coupling the drive motors to a rotary torque output member of the drill string drive that is configured to be coupled to the drill string, wherein the auxiliary hydraulic drive motor is a swash plate hydraulic motor having a variable swash plate angle, wherein the drill string drive comprises a controller assembly for the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor, which controller is configured to receive data related to the occurrence of torsional vibrations in the drill string and to control the swash plate hydraulic motor so as to counter the torsional vibrations.
The invention is based on the insight that a swash plate hydraulic motor can effectively be controlled at an attractive frequency in view of the occurring torsional vibrations in a drill string. Also the inertia of such a hydraulic motor is relatively small, e.g. compared to an electric motor of the same maximum power, so that the inertia of the motor itself does not further exacerbate the problem. The swash plate hydraulic motor itself is relatively compact and light as well compared to an electric motor, e.g. beneficial for integrating the motor in a top drive.
Itis noted that in the field of hydraulic drives, swash plate motors are often used in a secondary control circuit.
Speed and torque of the swash plate hydraulic motor can be controlled highly dynamic and with high accuracy.
In practical embodiments, the torsional vibrations reducing auxiliary hydraulic drive motor and related hydraulic circuit may be embodied and controlled so that it provides at some point extra drive power in addition to the main drive motor(s) and at another point in time it acts as a power sink counter to the main drive motor(s). For example, the circuit may comprise an accumulator.
In an advantageous embodiment, each main drive motor is embodied as a hydraulic motor.
These main drive hydraulic motor(s) have the advantage of a relatively low inertia compared to an electric main drive motor, which is beneficial in view of countering the torsional vibrations of the drill string. These one of more main drive hydraulic motor(s) are also more compact that electric main drive motor(s) of the same maximum power output. The latter may be of relevance when the motors are integrated in a top drive. For example, each main drive motor is embodied as a swash plate type hydraulic motor, wherein the variable swash plate angle of the main drive motor is primarily controlled to adjust the torque.
In embodiments, the drill string drive has a single main drive motor, preferably a hydraulic main drive motor, and a single torsional vibrations reducing auxiliary hydraulic drive motor.
In an embodiment, the controller assembly is configured to control the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor at a frequency of at least 1
Hz, e.g. at most 14 Hz. These fairly low frequencies can be implemented in the control of such hydraulic motors and are effective for reducing torsional drill string vibrations.
In an embodiment, the controller assembly is configured to control the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor at a frequency of between 2 and 5 Hz, which is considered practical for effectively countering torsional vibrations in a drill string during drilling of a wellbore.
In an embodiment, the one or more main drive motors are configured to provide at least 65% of a maximum power output of the drill string drive, e.g. between 75% and 85%, the remainder being provided by the auxiliary hydraulic drive motor. Preferable, there is a single main drive motor and a single auxiliary hydraulic drive motor.
In embodiments, the drive is configured and operated such that the one or more main drive motors deliver most of the torque required to drive the drill string and such that the speed of the drill string drive, and thus of the drill string, is primarily governed by the torsional vibrations reducing auxiliary hydraulic drive motor.
The transmission couples all drive motors, so that main drive motor(s) and the torsional vibrations reducing auxiliary hydraulic drive motor, to the rotary torque output member of the drill string drive that is configured to be coupled to the drill string.
In an embodiment, the drill string drive device is a top drive. In another embodiment, the drill string drive is a rotary table.
In an embodiment, the drill string drive device is a top drive, wherein the drive motors are configured to be fed via one or more hydraulic hoses from a main pump device that is located remote from the top drive.
In embodiments, as known in the art, the swash plate angle controller comprises a control cylinder controlled by a servo valve.
In an embodiment, the circuit comprises an accumulator associated with the torsional vibrations reducing auxiliary hydraulic drive motor.
In an embodiment, the torsional vibrations reducing auxiliary hydraulic drive motor is arranged in a constant pressure hydraulic circuit, possible the one or more main hydraulic drive motors being arranged in the same constant pressure hydraulic circuit.
In an embodiment, the torsional vibrations reducing auxiliary hydraulic drive motor is arranged in an associated secondary-control circuit, e.g. embodied as a closed loop circuit.
In an embodiment, the secondary-control circuit comprises a boost pump and boost pressure valve.
The invention also relates to a drilling system for drilling a wellbore, wherein the system comprises drill string drive as discussed herein and a monitoring system configured to provide data related to the occurrence of torsional vibrations in the drill string, wherein the monitoring system provides said data to the controller assembly for the swash plate angle for control of the swash plate hydraulic motor so as to counter the torsional vibrations.
The invention also relates to a method for drilling a wellbore, wherein use is made of a drill string drive as discussed herein.
In an embodiment, the controller assembly controls the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor at a frequency of at least 1 Hz, e.g. at most 14 Hz.
In an embodiment, the controller assembly controls the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor at a frequency of between 2 and 5 Hz.
In an embodiment, the one or more main drive motors provide at least 65% of a maximum power output of the drill string drive, e.g. between 75% and 85%, the remainder being provided by the torsional vibrations reducing auxiliary hydraulic drive motor.
The invention will now be discussed with reference to the drawings. In the drawings: - fig. 1 shows a mobile land rig for drilling of wellbores, - fig. 2 shows the top drive of the land rig of figure 1, - fig. 3 illustrates schematically the top drive of figure 2.
Figure 1 shows the mobile land 1 with a drilling tower 3 thereof in a working position and with a loader 17 thereof for drill string joints in a hand-off position thereof.
The mobile land rig 1 comprises a road vehicle, a trailer 4 in this figure, having a chassis 4 with a front end 5 and a rear end 6. The chassis 4 of the road vehicle is an elongated chassis 4.
Stabilizers 7 are provided near the rear end 6 of the chassis to support the chassis 4 when the drilling tower 3 is in the working position, as depicted. In embodiments, the stabilizers 7 are slidable connected to the chassis 4 to allow movement of the mobile land rig 1 relative to the wellbore, e.g. to slightly adjust the position of the mobile land rig 1 relative to the wellbore.
The drilling tower 3 is provided at the rear end 6 of the chassis 4 and is pivotally, e.g. by a hydraulic cylinder, relative to the road vehicle 2 between a substantial horizontal transport position and the vertical working position.
The mobile land rig 1 comprises a top drive system 8 comprising a traveling carriage 15 which is vertically mobile along the drilling tower 3 when in the working position by means of a motion drive. In this figure the motion drive 9 is a rack and pinion drive 9 with hydraulic pinion drive motors which allows precise movement of the top drive system 8 along the drilling tower 3.
The carriage 15 supports a top drive 40 as will be discussed in more detail below, having a main drive motor and a rotary torque output member adapted to be engaged with a top end of a drilling tubular 13.
The motion drive 9 is adapted to cause motion of the top drive system 8 parallel to the longitudinal axis of the drilling tower 1 in order to perform drilling and tripping operations.
The top drive 40 is pivotally supported by the traveling carriage 15 around a top drive pivot axis which extends parallel to the longitudinal axis of the drilling tower 3. The top drive 40 may be pivoted between a transfer position and a drilling position, when the drilling tower 3 is in the working position. The top drive system 8 is provided with an actuator assembly adapted to cause said pivot motion of the top drive 40. In this figure the top drive 40 is pivoted away from a drilling line 14 through a wellbore and is suspended in a transfer position above a drill string joint receiving line 20.
The mobile land rig 1 further comprises a drill floor 10 supported by the drilling tower 3 with a well center 11 positionable above a wellbore.
A slip device 12 adapted to suspend a drill string 20 in the wellbore is supported by the drill floor 10 and centered around the well center 11.
In embodiments, as shown, the drill floor 10 is supported by a motion drive allowing vertical motion of the drill floor 10. This allows repositioning of the drill floor 10 relative to the drilling tower 10 and the wellbore.
The drill floor 10 further comprises a slidable storage carrier 29 and mouse holes.
The drilling line 14 extends through the well center 11 parallel to the longitudinal axis of the drilling tower 3. In operations a drill string 20 extends along the drilling line 14, e.g. from the slip device 12 into the wellbore.
Figures 2 and 3 serve to illustrate the present invention, by way of an example.
The top drive 40 forms the drill string drive that is configured to impart rotational power to an upper end of drill string 20 for drilling of a wellbore.
The depicted top drive 40 (represented by a simple box in figure 3) has a single main drive motor 41, that is embodied as a hydraulic main drive motor.
The depicted top drive 40 has a single torsional vibrations reducing auxiliary hydraulic drive motor 50.
A transmission, e.g. a gear reducer transmission 60, couples the drive motors 41, 50 to a rotary torque output member 45 that is configured to be coupled to the drill string. In practical embodiments, the transmission has a fixed gear reduction ratio.
The auxiliary hydraulic drive motor 50 is a swash plate hydraulic motor.
As shown schematically in figure 3, this motor 50 is integrated in a hydraulic circuit that here is embodied (by way of example only) as a constant pressure, secondary-control hydraulic circuit that further comprises a pump 55 that is driven by an electric motor 56.
Figure 3 further schematically shows a controller assembly 70 for the swash plate angle of the motor 50.
The assembly 70 is configured to receive data related to the occurrence of torsional vibrations in the drill string and to control the swash plate hydraulic motor 50 so as to counter the torsional vibrations. The data is generated by a monitoring system 65 that is configured to provide data related to the occurrence of torsional vibrations in the drill string 20. The monitoring system 65 provides said data to the controller assembly 70.
By way of example, as known in the art, the swash plate angle controller assembly 70 comprises a control cylinder 71 that is controlled by a servo valve 72. The servo valve 72 is controlled by a further part of the controller assembly 70 on the basis of data related to the occurrence of torsional vibrations.
By way of example, the secondary-control circuit is a closed loop circuit.
By way of example, the secondary-control circuit comprises an accumulator 57.
By way of example, the secondary-control circuit comprises a boost pump 58 and boost pressure valve 59.
As discussed, the controller assembly 70 is configured to control the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor 50 at a frequency of at least 1 Hz, e.g. at most 14 Hz.
As discussed, the controller assembly 70 is, preferably, configured to control the swash plate angle of the torsional vibrations reducing auxiliary hydraulic drive motor 50 at a frequency of between 2 and 5 Hz.
The single main drive motor 41 is configured to provide at least 65% of a maximum power output of the drill string drive, e.g. between 75% and 85%, the remainder being provided by the single auxiliary hydraulic drive motor 50.
It is shown in figure 3, by way of example, that the main drive motor 41 is configured to be fed via one or more hydraulic hoses 42 from a main pump 43 that is located remote from the top drive 40, e.g. on the chassis of the land rig. For example, the main pump is driven by an electric motor.
It is shown in figure 3 that the swash plate hydraulic motor 50 in the secondary-control hydraulic circuit including the pump 55 driven by the electric motor 56 are mounted on the top drive 40. This allows for a small secondary-control circuit, which enhances its responsiveness and accuracy.
In other embodiments the hydraulic circuit may differ. For example, the swash plate hydraulic motor 50 could also be fed via the hoses 42 from the main pump, e.g. a single pair of hoses 42 being provided for all hydraulic motors of the top drive. For example, this arrangement provides for a constant pressure circuit for all hydraulic motors of the top drive.

Claims (12)

CONCLUSIESCONCLUSIONS 1. Boorstrengaandrijving, bijvoorbeeld een topaandrijving, ingericht om rotatievermogen aan te brengen aan een bovenste einde van een boorstreng voor het boren van een boorgat, welke boorstrengaandrijving omvat: - een of meer hoofdaandrijfmotoren, bij voorkeur een of meer hydraulische hoofdaandrijfmotoren, - een hydraulische torsietrillingen reducerende hulpaandrijfmotor, - een transmissie die de aandrijfmotoren koppelt met een uitgangsorgaan voor draaitorsie van de boorstrengaandrijving, welk orgaan is ingericht om te worden gekoppeld met de boorstreng, waarbij de hydraulische torsietrillingen reducerende hulpaandrijfmotor een hydraulische tuimelschijfmotor is met een tuimelschijf die een variabele tuimelschijfhoek heeft, waarbij de boorstrengaandrijving een regelsamenstel voor de tuimelschijfhoek van de hydraulische torsietrillingen reducerende hulpaandrijfmotor omvat, welk regelsamenstel is ingericht om data die verband houdt met het optreden van torsietrillingen in de boorstreng te ontvangen en om de hydraulische tuimelschijfmotor te regelen om torsietrillingen tegen te gaan.1. Drill string drive, for example a top drive, adapted to apply rotational power to an upper end of a drill string for drilling a borehole, which drill string drive comprises: - one or more main drive motors, preferably one or more hydraulic main drive motors, - a hydraulic torsional vibration reducing auxiliary drive motor, - a transmission coupling the drive motors to a rotational torque output member of the drill string drive, which member is adapted to be coupled to the drill string, wherein the hydraulic torsional vibration reducing auxiliary drive motor is a hydraulic swashplate motor having a swashplate having a variable swashplate angle, wherein the drill string drive comprises a control assembly for the swashplate angle of the hydraulic torsional vibration-reducing auxiliary drive motor, which control assembly is adapted to receive data related to the occurrence of torsional vibrations in the drill string and to control the hydraulic swashplate motor to counteract torsional vibrations. 2. Boorstrengaandrijving volgens conclusie 1, waarbij het regelsamenstel is ingericht voor het regelen van de tuimelschijfhoek van de hydraulische torsietrillingen reducerende hulpaandrijfmotor met een frequentie van tenminste 1 Hz, bijvoorbeeld ten hoogste 14 Hz.2. Drill string drive according to claim 1, wherein the control assembly is adapted to regulate the swashplate angle of the hydraulic torsional vibration-reducing auxiliary drive motor with a frequency of at least 1 Hz, for example at most 14 Hz. 3. Boorstrengaandrijving volgens conclusie 1 or 2, waarbij het regelsamenstel is ingericht voor het regelen van de tuimelschijfhoek van de hydraulische torsietrillingen reducerende aandrijfmotor met een frequentie van tussen 2 en 5 Hz.3. Drill string drive according to claim 1 or 2, wherein the control assembly is adapted to control the swashplate angle of the hydraulic torsional vibration-reducing drive motor with a frequency of between 2 and 5 Hz. 4. Boorstrengaandrijving volgens een of meer of conclusies 1 - 3, waarbij de een of meer hoofdaandrijfmotoren hydraulische motoren zijn.4. Drill string drive according to one or more of claims 1 - 3, wherein the one or more main drive motors are hydraulic motors. 5. Boorstrengaandrijving volgens een of meer of conclusies 1 - 4, waarbij de een of meer hoofdaandrijfmotoren zijn ingericht om tenminste 65% van een maximaal leverbaar vermogen van de boorstrengaandrijving te verschaffen, bijvoorbeeld tussen 75% en 85%, waarbij de rest wordt verschaft door de hydraulische torsietrillingen reducerende hulpaandrijfmotor.5. Drill string drive according to one or more of claims 1 - 4, wherein the one or more main drive motors are arranged to provide at least 65% of a maximum deliverable power of the drill string drive, for example between 75% and 85%, with the remainder being provided by the hydraulic torsional vibration reducing auxiliary drive motor. 6. Boorstrengaandrijving volgens een of meer of conclusies 1 - 5, waarbij de boorstrengaandrijfinrichting een topaandrijving is.6. Drill string drive according to one or more of claims 1 - 5, wherein the drill string drive device is a top drive. 7. Boorstrengaandrijving volgens conclusie 6, waarbij de een of meer hoofdaandrijfmotoren en de hydraulische tuimelschijfmotor zijn ingericht om te worden gevoed via een of meer hydraulisch slangen vanuit een hoofdpompinrichting die op een afstand verwijderd van de topaandrijving is opgesteld.7. Drill string drive according to claim 6, wherein the one or more main drive motors and the hydraulic swash plate motor are arranged to be supplied via one or more hydraulic hoses from a main pumping device arranged at a distance from the top drive. 8. Boorsysteem voor het boren van een boorgat, waarbij het systeem een boorstrengaandrijving volgens een of meer of conclusies 1 — 7 omvat en een monitoring systeem dat is ingericht om data te verschaffen die verband houden met het optreden van torsietrillingen in de boorstreng, waarbij het monitoring systeem die data levert aan het regelsamenstel voor de tuimelschijfhoek voor het regelen van de hydraulische tuimelschijfmotor om zo torsietrillingen tegen te gaan.8. Drilling system for drilling a borehole, wherein the system comprises a drill string drive according to one or more of claims 1 - 7 and a monitoring system designed to provide data relating to the occurrence of torsional vibrations in the drill string, wherein it monitoring system that provides data to the swashplate angle control assembly to control the hydraulic swashplate motor to counteract torsional vibration. 9. Werkwijze voor het boren van een boorgat, waarbij gebruik wordt gemaakt van een boorstrengaandrijving volgens een of meer of de conclusies 1 — 7 of van een boorsysteem volgens conclusie 8.9. Method for drilling a borehole, using a drill string drive according to one or more of claims 1 to 7 or a drilling system according to claim 8. 10. Werkwijze volgens conclusie 9, waarbij het regelsamenstel de tuimelschijfhoek van de hydraulische torsietrillingen reducerende hulpaandrijfmotor regelt met een frequentie van tenminste 1 Hz, bijvoorbeeld ten hoogste 14 Hz.10. Method according to claim 9, wherein the control assembly controls the swashplate angle of the hydraulic torsional vibration-reducing auxiliary drive motor with a frequency of at least 1 Hz, for example at most 14 Hz. 11. Werkwijze volgens conclusie 10, waarbij het regelsamenstel de tuimelschijfhoek van de hydraulische torsietrillingen reducerende hulpaandrijfmotor regelt met een frequentie van tussenz2en 5 Hz.11. Method according to claim 10, wherein the control assembly controls the swashplate angle of the hydraulic torsional vibration-reducing auxiliary drive motor at a frequency of between 2 and 5 Hz. 12. Werkwijze volgens een of meer of conclusies 9 — 11, waarbij de een of meer hoofdaandrijfmotoren tenminste 65% van een maximaal leverbaar vermogen van de boorstrengaandrijving verschaffen, bijvoorbeeld tussen 75% en 85%, waarbij de rest wordt verschaft door de hydraulische torsietrillingen reducerende hulpaandrijfmotor.12. Method according to one or more of claims 9 - 11, wherein the one or more main drive motors provide at least 65% of a maximum deliverable power of the drill string drive, for example between 75% and 85%, the remainder being provided by the hydraulic torsional vibration reducing auxiliary drive motor.
NL2032006A 2022-05-27 2022-05-27 A drill string drive to impart rotational power to a top end of drill string for drilling of a wellbore NL2032006B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2032006A NL2032006B1 (en) 2022-05-27 2022-05-27 A drill string drive to impart rotational power to a top end of drill string for drilling of a wellbore
PCT/EP2023/064012 WO2023227704A1 (en) 2022-05-27 2023-05-25 A drill string drive to impart rotational power to a top end of drill string for drilling of a wellbore

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NL2032006A NL2032006B1 (en) 2022-05-27 2022-05-27 A drill string drive to impart rotational power to a top end of drill string for drilling of a wellbore

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2266248A1 (en) * 1999-03-22 2000-09-22 Kenneth C. Jensen Method and apparatus for controlling drill string torsional vibration
US20060000643A1 (en) * 2004-06-30 2006-01-05 Schlumberger Technology Corporation Top drive torsional baffle apparatus and method
US9624762B2 (en) 2012-01-24 2017-04-18 National Oilwell Varco Norway As System and method for reducing drillstring oscillations
US20190284924A1 (en) * 2016-12-09 2019-09-19 Halliburton Energy Services, Inc. Downhole drilling methods and systems with top drive motor torque commands based on a dynamics model
US10927657B2 (en) 2016-06-15 2021-02-23 Itrec B.V. Wellbore drilling with a top drive device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2266248A1 (en) * 1999-03-22 2000-09-22 Kenneth C. Jensen Method and apparatus for controlling drill string torsional vibration
US20060000643A1 (en) * 2004-06-30 2006-01-05 Schlumberger Technology Corporation Top drive torsional baffle apparatus and method
US9624762B2 (en) 2012-01-24 2017-04-18 National Oilwell Varco Norway As System and method for reducing drillstring oscillations
US10927657B2 (en) 2016-06-15 2021-02-23 Itrec B.V. Wellbore drilling with a top drive device
US20190284924A1 (en) * 2016-12-09 2019-09-19 Halliburton Energy Services, Inc. Downhole drilling methods and systems with top drive motor torque commands based on a dynamics model

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