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    • 1. 发明申请
    • A METHOD FOR SUPPLY CHAIN DECOMPOSITION
    • 一种供应链分解方法
    • US20050171826A1
    • 2005-08-04
    • US10707977
    • 2004-01-29
    • Brian DentonJohn Forrest
    • Brian DentonJohn Forrest
    • G06Q10/00G06F17/60
    • G06Q10/087G06Q10/063
    • The invention provides a method and system for solving a linear program having constraints in a production planning system. The invention first determines which of the constraints can be temporarily relaxed based on stocking point criteria. The stocking point criteria relates to time dependent stocking points that include part numbers, locations of parts identified by the part numbers, and the time periods when the parts will be available. The invention relaxes the constraints that can be relaxed and decomposes the linear program into smaller independent linear programs. The invention initially solves the smaller independent linear programs with relaxed constraints (simultaneously in parallel) to produce an initial solution. Next, the invention replaces variables in the linear program with constants based on this initial solution. After this the invention restores the material balance and sourcing constraints and finally solves (re-solves) the linear program using the constants and with all constraints in place to obtain a complete solution of the linear program.
    • 本发明提供了一种用于解决在生产计划系统中具有约束的线性程序的方法和系统。 本发明首先确定哪些约束可以基于放养点标准暂时放宽。 放样点标准涉及时间依赖的放样点,其包括部件号,由部件号识别的部件的位置以及部件可用的时间段。 本发明放松了可以放宽的约束,并将线性程序分解成较小的独立线性程序。 本发明最初解决了具有放宽约束(同时并行)的较小的独立线性程序以产生初始解决方案。 接下来,本发明基于该初始解替换线性程序中的变量。 在此之后,本发明恢复了物料平衡和采购约束,并最终通过使用常数和所有约束来解决(重新解决)线性程序,以获得线性程序的完整解决方案。
    • 2. 发明申请
    • A METHOD FOR CONSIDERING HIERARCHICAL PREEMPTIVE DEMAND PRIORITIES IN A SUPPLY CHAIN OPTIMIZATION MODEL
    • 一种考虑供应链优化模型中分层预测需求优先级的方法
    • US20050171828A1
    • 2005-08-04
    • US10707979
    • 2004-01-29
    • Brian DentonJohn ForrestRobert Milne
    • Brian DentonJohn ForrestRobert Milne
    • G06Q10/00G06F17/60
    • G06Q10/087G06Q10/0631G06Q10/06312G06Q10/06314G06Q10/06315G06Q10/06375
    • The invention comprises a method for achieving consideration of preemptive priorities within a supply chain optimization model. More specifically, the invention provides a method of allocating resources to a hierarchy of demand priorities in a linear programming production planning system. In particular, the invention aggregates the demand priorities into different priority groups and allocates the resources to the highest priority group of demand priorities using a first linear programming model. Next, the invention allocates remaining resources to the next highest priority group of demand priorities using a second linear programming model. The second linear programming model uses results from the first linear programming model. The invention continues this process by iteratively repeating the process of allocating remaining resources to the remaining groups of demand priorities, in order of priority. The system and method were employed to integrate the consideration of preemptive prioritization of customer demands with an advanced planning system for optimizing established planning objectives (e.g. customer service, short lead times, low inventory, and prioritized allocation of supply and capacity) to compute a feasible production plan for the division.
    • 本发明包括一种在供应链优化模型中实现对抢占优先级的考虑的方法。 更具体地,本发明提供了一种在线性规划生产计划系统中将资源分配给需求优先级的层级的方法。 特别地,本发明将需求优先级集中到不同的优先级组中,并且使用第一线性规划模型将资源分配给最优先级的需求优先级组。 接下来,本发明使用第二线性规划模型将剩余资源分配给下一个最高优先级的需求优先级组。 第二个线性规划模型使用第一个线性规划模型的结果。 本发明通过重复地按照优先次序重复将剩余资源分配给剩余的需求优先级组的过程来继续该过程。 采用系统和方法将客户需求先发优先考虑的考虑与先进的规划系统结合起来,以优化既定的规划目标(例如客户服务,交货期短,库存量低,供应和容量的优先配置),以计算可行 生产计划部门。
    • 3. 发明申请
    • METHOD FOR SIZING PRODUCTION LOT STARTS WITHIN A LINEAR SYSTEM PROGRAMMING ENVIRONMENT
    • 在线性系统编程环境中生产最大起点的方法
    • US20050096771A1
    • 2005-05-05
    • US10605854
    • 2003-10-31
    • Brian DentonJohn ForrestRobert Milne
    • Brian DentonJohn ForrestRobert Milne
    • G06F19/00G06Q10/00
    • G06Q10/087G06Q10/06
    • Allocating limited manufacturing resources to achieve a feasible production plan that is consistent with customer demand is a difficult and common problem faced in many manufacturing industries. For large-scale multi-stage manufacturing systems, existing methods are typically based either on allocating limited resources sequentially, according to a priority ranked list of production starts, or on linear programming based models. The output of such planning models is a production plan which specifies the quantity of each part to produce at each plant, using resources available to the enterprise. Typically there are lot-sizing rules defining the permissible production start quantities. The invention disclosed herein is a method for applying these rules to the lot-sizing of production starts within a linear program. It employs advanced heuristics that consider both established operational objectives (e.g. customer service, short lead times, low inventory, and prioritized allocation of supply and capacity) and lot-size rules to efficiently compute a feasible production plan for the division.
    • 分配有限的制造资源,实现符合客户需求的可行的生产计划是许多制造业面临的一个困难和常见的问题。 对于大型多级制造系统,现有方法通常基于依次分配有限资源,根据优先排序的生产启动列表,或基于线性规划的模型。 这种规划模型的产出是一个生产计划,其中规定了每个工厂生产的每个部件的数量,使用企业可用的资源。 通常,定义许可生产开始数量的批量规则。 本文公开的发明是一种将这些规则应用于在线性程序内的生产开始批量生产的方法。 它采用先进的启发式方法,考虑既定的经营目标(例如客户服务,交货时间短,库存量低,供应和容量优先分配)和批量规则,以有效地计算出该部门的可行生产计划。
    • 6. 发明授权
    • Navigable downhole drilling system
    • 可导航的井下钻井系统
    • US5269383A
    • 1993-12-14
    • US822359
    • 1992-01-15
    • John Forrest
    • John Forrest
    • E21B4/02E21B7/06E21B41/00E21B44/00E21B47/022E21B7/04
    • E21B47/022E21B4/02E21B41/0085E21B44/005E21B7/068
    • A navigable downhole drilling system incorporating a drilling motor having a system of sensors and information processors for determining the depth, inclination, direction and thrust of the drilling motor. Accordingly, the drilling operation can be continuously monitored and adjusted to ensure desired directional drilling. A programmed processor may be incorporated into the drilling system to guide the drilling motor along a predetermined course. A generator assembly provides power to the processors and sensors as a result of the precessional rotation of the rotor within the stator of the drilling motor. The overall length of the drilling system is minimized by piggybacking the thrust bearings with the power generation unit and siamesing the transmission assembly for the drilling motor with the power section of the motor. As a result, a downhole drilling system of navigable length is created which can be readily directed along the desired course.
    • 一种可导航的井下钻井系统,其包括具有用于确定钻井马达的深度,倾斜度,方向和推力的传感器和信息处理器系统的钻井马达。 因此,可以连续地监视和调整钻孔操作,以确保期望的定向钻孔。 可以将编程的处理器并入到钻井系统中以沿着预定的过程引导钻井马达。 由于转子在钻孔马达的定子内的进动旋转的结果,发电机组件向处理器和传感器提供动力。 通过用发电单元搭载推力轴承,并利用电动机的动力部分将钻井电机的变速器组件分开,使钻井系统的总长度最小化。 结果,产生可导航长度的井下钻井系统,其可以沿着期望的路线容易地引导。
    • 7. 发明授权
    • Thermal shield for drilling motors
    • 用于钻孔电机的防护罩
    • US4926949A
    • 1990-05-22
    • US281153
    • 1988-12-07
    • John Forrest
    • John Forrest
    • E21B4/02E21B21/00E21B36/00
    • E21B4/02E21B21/00E21B36/003
    • A thermal jacket shield for a drilling motor which permits drilling operations in high temperature wells without failure of the motor. The thermal shield includes a multiple passageway casing to shroud the motor and through which is circulated drilling fluid used to operate the drilling motor. The motor is positioned within concentric inner and outer shells which form a fluid annulus through which the fluid is circulated. An intermediate housing sub connected to the lower end of the drilling motor includes a nozzle through which a controlled quantity of drilling fluid is passed into the annulus formed by the inner and outer annular shells. Outlet ports in the outer shell allow the drilling fluid to flow to the exterior of the tool. As a result, cooling fluid is continuously passed through the jacket shield to maintain the operating temperature of the motor at an acceptable temperature.
    • 用于钻井电机的热套护罩,允许在高温井中进行钻孔操作,而不会损坏电机。 热屏蔽包括多个通道壳体,用于覆盖电动机,并且通过该多通道壳体是用于操作钻井马达的循环钻井液。 电动机位于同心的内外壳中,形成流体环,流体通过该环流动。 连接到钻孔马达的下端的中间壳体子包括一个喷嘴,通过该喷嘴将受控量的钻井流体通过该喷嘴进入由内外壳形成的环形空间。 外壳中的出口端口允许钻井液流向工具外部。 结果,冷却流体连续地通过护套罩,以将电动机的工作温度保持在可接受的温度。
    • 8. 发明授权
    • Directional drilling of a drill string
    • 钻柱的定向钻孔
    • US4807708A
    • 1989-02-28
    • US79780
    • 1986-10-01
    • John ForrestRoger CatherallWilliam StewartRandall J. Pounds
    • John ForrestRoger CatherallWilliam StewartRandall J. Pounds
    • E21B7/06E21B17/10E21B7/08
    • E21B17/1078E21B7/068
    • A method of controlling the direction of a drill bit (3) at the downhole end of a drill string (2) drilling from a surface comprises providing two steerable stabilizers (4, 5) at the downhole end of the drill string (2) at locations spaced apart in the drilling direction and adjusting the orientation of the stabilizers to create reactive forces from the bore hole (6) to deflect the course of the bit (3) in a desired direction. The stabilizers (4, 5) are suitably arranged eccentrically and circumferentially offset by 180.degree..+-.60.degree.. In normal drilling the drill string (2) is rotated such that stabilizers (4, 5) engage the bore hole (6) to support a downhole motor (1) against tilting. When off course drilling is sensed the stabilizers are rotated to a position and stopped from rotation such that drilling forces generate reaction forces to cause a desired change of direction.
    • PCT No.PCT / GB86 / 00727 Sec。 371日期:1987年10月1日 102(e)日期1987年10月1日PCT申请日1986年11月28日PCT公开号 公开号WO87 / 03329 日期:1987年6月4日。一种用于控制钻杆(3)在钻柱(2)从井下钻孔的井下端的方向的方法包括在井下端处提供两个可转向稳定器(4,5) 所述钻柱(2)位于沿钻孔方向间隔开的位置处,并且调节所述稳定器的方向以产生来自所述钻孔(6)的反作用力,以使所述钻头(3)的路线在期望的方向偏转。 稳定器(4,5)适当地偏心地偏置180°+/- 60°。 在正常钻孔中,钻柱(2)旋转,使得稳定器(4,5)与钻孔(6)接合,以支撑井下马达(1)以防止倾斜。 当感测到离心钻井时,稳定器被旋转到一个位置并且停止旋转,使得钻井力产生反作用力以引起期望的方向变化。
    • 9. 发明授权
    • Power generation from a multi-lobed drilling motor
    • 多叶钻机的发电
    • US5248896A
    • 1993-09-28
    • US973602
    • 1992-11-09
    • John Forrest
    • John Forrest
    • E21B4/02F03B13/02
    • E21B4/02F03B13/02
    • A power generation unit associated with a downhole drilling motor capable of producing sufficient rotational speeds to produce power for operating downhole devices associated with the drilling operation. The power generation unit takes advantage of the high speed precessional rotation of the rotor within the stator to drive the generator. The assembly includes a multi-lobed rotor displaceable within a stator using drilling fluid pumped therethrough. A crankshaft, mounted at one end concentric with the rotor and at its high speed take-off end concentric with the stator, transfers the rotor center precession to the shaft of the generator. In a preferred embodiment, the generator will include a socket for simply connecting downhole devices requiring electrical power.
    • 与井下钻井电机相关联的发电单元,其能够产生足够的转速以产生用于操作与钻井操作相关联的井下装置的动力。 发电单元利用定子内的转子的高速进动旋转来驱动发电机。 该组件包括可在定子内使用从其中泵出的钻井液置换的多叶片转子。 安装在与转子同心的一端并且与定子同心的高速起飞端的曲轴将转子中心进动转移到发电机的轴上。 在优选实施例中,发电机将包括用于简单地连接需要电力的井下装置的插座。
    • 10. 发明授权
    • Apparatus for controlled absorption of axial and torsional forces in a
well string
    • 用于受控吸收井筒中的轴向和扭转力的装置
    • US4901806A
    • 1990-02-20
    • US223461
    • 1988-07-22
    • John Forrest
    • John Forrest
    • E21B17/07E21B44/00
    • E21B17/073E21B44/005
    • A drill string apparatus for the controlled absorption of both axial and torsional forces exhibited on the well string during drilling operations. The device is adapted to be connected in the drill string above the drilling tool in order to control the forces acting on the bit and to arrange the mean weight on bit for the selected drilling operation. Generally, the apparatus includes an outer casing coupled at its upper end to the drill string and an inner assembly telescopically received within the outer casing and connected at its lower end to the lower part of the bottom hole assembly or the drilling tool. Rotational torque is transferred from the drill string and outer casing to the inner assembly and drill bit by a series of helical splines. The mean weight on bit is controlled through an interchangeable pressure control nozzle mounted at the top of the inner assembly. Dual pistons with corresponding fluid chambers dampen axial forces while the helical splines decouple the torsional forces from axial vibrations to ensure proper control of the drill bit. In addition to attenuating vibration in conventional drilling operations, the present invention can be utilized in highly deviated holes and in drill strings using coiled tubes.
    • 用于在钻井操作期间在井筒上显示的轴向和扭转力的受控吸收的钻柱装置。 该装置适于连接在钻具上方的钻柱中,以便控制作用在钻头上的力,并将平均重量排列在钻头上用于选定的钻孔操作。 通常,该装置包括在其上端连接到钻柱的外壳和可伸缩地容纳在外壳内并且在其下端处连接到底孔组件或钻孔工具的下部的内部组件。 旋转扭矩通过一系列螺旋花键从钻柱和外壳传递到内组件和钻头。 钻头的平均重量通过安装在内部组件顶部的可互换压力控制喷嘴来控制。 具有相应流体室的双活塞抑制轴向力,而螺旋花键将扭转力与轴向振动分离,以确保钻头的适当控制。 除了在常规钻孔操作中衰减振动之外,本发明可以用于高度偏斜的孔和使用螺旋管的钻柱中。