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    Method to optimize drilling efficiency while reducing stick slip
    33.
    发明授权
    Method to optimize drilling efficiency while reducing stick slip 有权
    优化钻井效率同时减少滑移的方法

    公开(公告)号：US09388681B2

    公开(公告)日：2016-07-12

    申请号：US14431071

    申请日：2013-08-17

    Applicant: Halliburton Energy Services, Inc.

    Inventor： Jason Dykstra ,  Zhijie Sun

    IPC: G06F19/00 ,  E21B44/00 ,  G05D17/02

    CPC classification number: E21B44/005 ,  E21B44/00 ,  G05D17/02

    Abstract: Reducing or eliminating stick-slip and vibrations downhole may include controlling top drive torque in order to adjust drill bit angular speed in a manner that prevents, eliminates, or reduces stick-slip and vibration. Control methods and systems may include solving one or more optimization problems including an objective function. The objective function may be subject to conditions including a physical model of the drilling system. The objective function may be minimized without reference to a model, but instead by reference to estimated stick-slip frequency based upon a drill bit angular speed profile. In addition, actual downhole measurements for use in control methods and systems, such as drill bit angular speed, may be estimated using an observer.

    Abstract translation: 降低或消除井下的粘滑和振动可能包括控制顶部驱动扭矩，以便以防止，消除或减少粘滑和振动的方式调节钻头角速度。 控制方法和系统可以包括解决包括目标函数在内的一个或多个优化问题。 目标函数可以受到包括钻井系统的物理模型的条件的约束。 可以在不参考模型的情况下最小化目标函数，而是参考基于钻头角速度分布的估计的粘滑点频率。 此外，可以使用观察者来估计用于控制方法和系统的实际井下测量，例如钻头角速度。

    Method to optimize hydraulic fracturing spread with electric pumps
    34.
    发明授权
    Method to optimize hydraulic fracturing spread with electric pumps 有权

    公开(公告)号：US12281555B2

    公开(公告)日：2025-04-22

    申请号：US17864750

    申请日：2022-07-14

    Applicant: Halliburton Energy Services, Inc.

    Inventor： Zhijie Sun ,  Tirumani Swaminathan ,  Ian Mitchell

    IPC: E21B43/26 ,  E21B43/267 ,  F04B17/03 ,  F04B17/05 ,  F04B23/04 ,  F04B49/00 ,  F04B49/06

    Abstract: A method of controlling a pumping stage of a fracturing fleet at a wellsite with a set of diesel pumps and at least one electric pump to reduce the total operating cost by decreasing the flowrate to the pump units with the higher operating cost and increasing the flowrate to the pump units with the lower operating costs. An optimization process on a computer system communicatively connected to the plurality of pumping units can communicate a first interim setpoint to each pumping unit. The optimization process can calculate an operating cost for the diesel frac pumps based on sensor measurements of pressure, flowrate, and motor speed. The optimization process can calculate an operating cost for the electric frac pumps based on the measured power usage and cost of the power. The optimization process can lower the operating cost of fracturing fleet below a threshold operating cost value.

    Monitoring drilling vibrations based on rotational speed
    35.
    发明授权
    Monitoring drilling vibrations based on rotational speed 有权

    公开(公告)号：US12055031B2

    公开(公告)日：2024-08-06

    申请号：US17369597

    申请日：2021-07-07

    Applicant: Halliburton Energy Services, Inc.

    Inventor： Zhijie Sun ,  Ketan C. Bhaidasna ,  Ganesh Ramakrishnan

    IPC: E21B44/04 ,  E21B3/02

    CPC classification number: E21B44/04 ,  E21B3/022 ,  E21B2200/20 ,  E21B2200/22

    Abstract: The disclosure provides a solution for monitoring stick-slip vibrations without using any surface torque measurements. Instead, the disclosure provides a method to monitor stick-slip vibrations based on rotational speed. A stick-slip monitor, a top drive controller and a method of operating a drill string are provided herein that use rotational speed for monitoring stick-slip vibrations. In one example, the method of operating a drill string includes: (1) performing a frequency domain analysis of an RPM signal associated with a top drive that is used to rotate a drill string, and (2) determining a presence of torsional oscillations of the drill string based on the frequency domain analysis of the RPM signal.

    SYSTEM AND METHOD FOR MITIGATING STICK-SLIP
    36.
    发明申请
    SYSTEM AND METHOD FOR MITIGATING STICK-SLIP 有权

    公开(公告)号：US20210079781A1

    公开(公告)日：2021-03-18

    申请号：US16822944

    申请日：2020-03-18

    Applicant: Halliburton Energy Services, Inc.

    Inventor： Zhijie Sun ,  Sujian Huang

    IPC: E21B44/04 ,  E21B47/024 ,  E21B3/035 ,  G05D19/02

    Abstract: A method for drilling a well. The method may include detecting stick-slip vibrations at a frequency via a downhole sensor. The method may further include determining a reflection coefficient of a drill bit for the frequency based on at least one of a rotational speed of the drill bit or a torque of the drill bit. The method may also include determining a reflection coefficient of a top drive for the frequency based on at least one of a rotational speed of the top drive or a torque produced by the top drive. The method may further include adjusting a control system in electronic communication with the top drive based on the reflection coefficient of the drill bit for the frequency and the reflection coefficient of the top drive for the frequency.

    Structure for fluid flowback control decision making and optimization
    37.
    发明授权
    Structure for fluid flowback control decision making and optimization 有权

    公开(公告)号：US10941642B2

    公开(公告)日：2021-03-09

    申请号：US15577380

    申请日：2015-07-17

    Applicant: Halliburton Energy Services, Inc.

    Inventor： Qiuying Gu ,  Jason D. Dykstra ,  Zhijie Sun

    IPC: G06G7/48 ,  E21B43/267 ,  G06F30/20 ,  E21B49/00

    Abstract: Methods and systems are presented in this disclosure for evaluating whether to apply fluid flowback during a fracture closure stage of a hydraulic fracturing operation of a reservoir formation. Information collected prior to the fracture closure stage of the hydraulic fracturing operation can be first gathered. Based on the collected information, it can be determined whether to perform fluid flowback during the fracture closure stage following a treatment stage of the fracturing operation. Based on the determination, a rate of the fluid flowback can be adjusted and optimized in real-time during the fracture closure stage.

    Reducing microseismic monitoring uncertainty
    39.
    发明授权
    Reducing microseismic monitoring uncertainty 有权

    公开(公告)号：US10429528B2

    公开(公告)日：2019-10-01

    申请号：US15518572

    申请日：2014-11-19

    Applicant: Halliburton Energy Services, Inc.

    Inventor： Jason D. Dykstra ,  Zhijie Sun

    IPC: E21B43/26 ,  G01V1/28 ,  G01V1/42 ,  G01V1/50 ,  E21B47/12 ,  E21B41/00 ,  E21B49/00

    Abstract: Uncertainty of microseismic monitoring results can be reduced to improve hydraulic fracture modeling. A computing device can use a fracture model to determine a predicted geometry of a hydraulic fracture in a subterranean formation based on properties of a fracturing fluid that is introduced into the subterranean formation. An uncertainty index of the predicted geometry of the hydraulic fracture can be determined based on an uncertainty value of the predicted geometry and a trend of uncertainty values. When the injection flow rate of the fracturing fluid is less than a maximum flow rate, it can be increased from an initial injection flow rate to an increased injection flow rate in response to determining the uncertainty index exceeds a pre-set maximum.

    Optimizing completion operations
    40.
    发明授权
    Optimizing completion operations 有权

    公开(公告)号：US10329882B2

    公开(公告)日：2019-06-25

    申请号：US15517131

    申请日：2014-12-31

    Applicant: HALLIBURTON ENERGY SERVICES, INC.

    Inventor： Jason D. Dykstra ,  Zhijie Sun

    IPC: E21B33/14 ,  E21B41/00 ,  E21B44/00 ,  G05B19/02 ,  G05B13/04 ,  E21B43/04 ,  E21B43/00 ,  E21B43/26

    Abstract: A system for optimizing a completion operation includes an interface to equipment and sensors for performing the completion operation. The interface supplies control signals to the equipment and obtains measurement signals from the sensors. The system further includes a short-term optimizer that derives a current job state based at least in part on the measurement signals, and that further adjusts the control signals to optimize a short-term cost function. The short-term cost function includes a difference between the current job state and a desired job state derived from optimized values of a set of decision variables. The system further includes a long-term optimizer module that determines the optimized values based on a long-term cost function, the long-term cost function accounting for at least a long-term reward and a final state cost.

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