公开(公告)号：US06246831B1

公开(公告)日：2001-06-12

申请号：US09334337

申请日：1999-06-16

Applicant: David E. Seitz ,  David Paul Sharp ,  Thomas Lamson Harman ,  Louis J. Everett ,  Rodney H. Neumann

Inventor： David E. Seitz ,  David Paul Sharp ,  Thomas Lamson Harman ,  Louis J. Everett ,  Rodney H. Neumann

IPC: F24H110

CPC classification number: H05B1/0283 ,  F24H9/2021 ,  G05D23/1931 ,  H05B3/10 ,  H05B2203/021

Abstract: An improved system, method and apparatus for control of an instantaneous flow-through fluid heater system is disclosed. The control incorporates a logic control method providing modulation of power in small steps to a plurality of heating elements retaining responsiveness to closed-loop control needs without inducing light flicker. Further, the life of the coils of heating circuit electromechanical relays are extended by energizing the coils with a pulse-width-modulated drive decreasing in duty cycle and thus the latent coil heat when an increase in mains voltage is sensed. The life of the contacts of same relays are extended by inhibiting heating element triac drive immediately upon sensing loss of relay coil power, such as by an over temperature limit switch opening, thus ensuring that relay contacts open with zero heating element current. In addition to the software “watchdog timer” internal to the microcontroller, a redundant fail-safe circuit external to the microcontroller prevents a program lockup condition from leaving any heating element triac or relay drive in an energized state. A combination of control hardware and program provide self-diagnostic detection of an inoperative thermistor, stuck relay, or a failed triac or heating element. An improved means of sensing water level is disclosed incorporating a low-level, high frequency signal, allowing detection of non-conducting distilled water and the reliable detection of water in the presence of main-frequency currents as would exist in ungrounded sheathed heating elements with electrical leakage or as would exist with bare-elements.

Abstract translation: 公开了一种用于控制瞬时流通流体加热器系统的改进的系统，方法和装置。 该控制包括逻辑控制方法，其将小功率的功率调制提供给保持对闭环控制需求的响应性而不引起光闪烁的多个加热元件。 此外，加热电路机电继电器的线圈的寿命通过以占空比递减的脉宽调制驱动器来激励线圈而延长，并且因此当检测到电源电压的增加时潜在线圈的热量。 通过在感测到继电器线圈电力的损失（例如通过过温限制开关开路）时，通过禁止加热元件三端双向可控硅开关来延长同一继电器的触点的寿命，从而确保继电器触点以零加热元件电流打开。 除了微控制器内部的软件“看门狗定时器”之外，单片机外部的冗余故障保护电路防止程序锁定状态使任何加热元件三端双向可控硅或继电器驱动器处于通电状态。 控制硬件和程序的组合提供了对不可操作的热敏电阻，卡住继电器或失效的三端双向可控硅开关或加热元件的自诊断检测。 公开了一种改进的感测水位的方法，其结合了低水平的高频信号，允许检测非导电蒸馏水和在存在主频电流的情况下可靠地检测水，如将存在于未接地的护套加热元件中， 漏电或裸线存在。

公开(公告)号：US06581700B2

公开(公告)日：2003-06-24

申请号：US10097038

申请日：2002-03-12

Applicant: Harry B. Curlett ,  David Paul Sharp ,  Marvin Allen Gregory

Inventor： Harry B. Curlett ,  David Paul Sharp ,  Marvin Allen Gregory

IPC: E21B716

CPC classification number: E21B7/18 ,  E21B7/16

Abstract: A method and system for drilling or cutting a subterranean well or formation 52 using a drilling rig 5, a drill string 55, a plurality of solid material impactors 100, a drilling fluid and a drill bit 60 is disclosed. This invention may have particular utility in drilling wells for the petroleum industry and for cutting formation in the mining and tunnel boring industries. In a preferred embodiment, a plurality of solid material impactors are introduced into the drilling fluid and pumped through the drill string and drill bit to impact the formation ahead of the bit. At the point of impact, a substantial portion by weight of the impactors may have sufficient energy to structurally alter, excavate, and/or fracture the impacted formation. The majority by weight of the plurality of solid material impactors may have a mean diameter of at least 0.100 inches, and may structurally alter the formation to a depth of at least twice the mean diameter of the particles comprising the impacted formation. Impactor mass and/or velocity may be selected to satisfy a mass-velocity relationship in the respective impactor sufficient to structurally alter the formation. Rotational, gravitational, kinetic and/or hydraulic energy available at the bit in each of the bit, the impactors and the fluid may thereby more efficiently effect the generation and removal of formation cuttings ahead of the bit.

公开(公告)号：US06386300B1

公开(公告)日：2002-05-14

申请号：US09665586

申请日：2000-09-19

Applicant: Harry B. Curlett ,  David Paul Sharp ,  Marvin Allen Gregory

Inventor： Harry B. Curlett ,  David Paul Sharp ,  Marvin Allen Gregory

IPC: E21B716

CPC classification number: E21B7/18 ,  E21B7/16

Abstract: A method and system for drilling or cutting a subterranean well or formation 52 using a drilling rig 5, a drill string 55, a plurality of solid material impactors 100, a drilling fluid and a drill bit 60 is disclosed. This invention may have particular utility in drilling wells for the petroleum industry and for cutting formation in the mining and tunnel boring industries. In a preferred embodiment, a plurality of solid material impactors are introduced into the drilling fluid and pumped through the drill string and drill bit to impact the formation ahead of the bit. At the point of impact, a substantial portion by weight of the impactors may have sufficient energy to structurally alter, excavate, and/or fracture the impacted formation. The majority by weight of the plurality of solid material impactors may have a mean diameter of at least 0.100 inches, and may structurally alter the formation to a depth of at least twice the mean diameter of the particles comprising the impacted formation. Impactor mass and/or velocity may be selected to satisfy a mass-velocity relationship in the respective impactor sufficient to structurally alter the formation. Rotational, gravitational, kinetic and/or hydraulic energy available at the bit in each of the bit, the impactors and the fluid may thereby more efficiently effect the generation and removal of formation cuttings ahead of the bit.

Abstract translation: 公开了一种使用钻机5，钻柱55，多个固体材料冲击器100，钻井液和钻头60来钻取或切割地下井或地层52的方法和系统。 本发明可以在用于石油工业的钻井和在采矿和隧道掘进工业中的切割成形方面具有特殊的用途。 在优选实施例中，将多个固体材料冲击器引入钻井液中并通过钻柱和钻头泵送以冲击钻头前方的地层。 在冲击点，大部分重量的冲击器可能具有足够的能量来结构地改变，挖掘和/或破坏受冲击的地层。 多个固体材料冲击器的大部分重量可以具有至少0.100英寸的平均直径，并且可以在结构上将结构改变为包含受冲击地层的颗粒的平均直径的至少两倍的深度。 可以选择冲击物质量和/或速度以满足各个冲击器中的质量 - 速度关系，足以在结构上改变地层。 钻头，冲击器和流体中的钻头处的旋转，重力，动能和/或液压能量可以更有效地影响钻头前方的地层切屑的产生和移除。