公开(公告)号：US4307395A

公开(公告)日：1981-12-22

申请号：US137108

申请日：1980-04-03

Applicant: Thomas R. Standish

Inventor： Thomas R. Standish

IPC: G06F17/40 ,  G06F3/04 ,  G08C19/28 ,  G11B5/02 ,  H04Q9/02

CPC classification number: G06F3/13

Abstract: A method and apparatus for accepting analog voltage signals from a reciprocating liquid well pump and digitizing the signals and storing the signals for playback at a later time. A receiving circuit accepts two analog signals, one of which is proportional to the load in the polished rod, the other of which is proportional to the displacement of the polished rod. Simultaneously the two analog signals are digitized by means of an analog to digital converter and the digital data is stored on a digital memory integrated circuit. The digital memory may be replayed through a digital to analog converter into an x-y plotter. Digital latches and counters detect the start and end of a pumping cycle to insure that one full cycle of the reciprocating pump is stored in the digital memory. Timing circuitry strobes the load and displacement data into the digital memory in equal time increments to allow time related methematics to be performed by a computer. A circuit which accepts the digital memory, which may be separate from the recording device, formats the data and serially transmits the data in a form acceptable to a computer.

Abstract translation: 一种用于从往复式液体井泵接收模拟电压信号并数字化信号并将信号存储在稍后再现的方法和装置。 接收电路接受两个模拟信号，其中一个模拟信号与抛光棒中的负载成比例，另一个与抛光棒的位移成正比。 同时，两个模拟信号通过模数转换器进行数字化，数字数据存储在数字存储器集成电路中。 数字存储器可以通过数模转换器重播成x-y绘图仪。 数字锁存器和计数器检测泵送循环的开始和结束，以确保往复泵的一个完整循环被存储在数字存储器中。 定时电路以相等的时间增量将负载和位移数据选通到数字存储器中，以便计算机执行与时间相关的数学运算。 接受可能与记录装置分离的数字存储器的电路格式化数据，并以计算机可接受的形式串行发送数据。

公开(公告)号：US4286925A

公开(公告)日：1981-09-01

申请号：US89844

申请日：1979-10-31

Applicant: Thomas R. Standish

Inventor： Thomas R. Standish

IPC: F04B49/06 ,  F04B49/10 ,  F04B49/00

CPC classification number: F04B49/065 ,  F04B49/10 ,  F04B2201/121 ,  F04B2201/1211

Abstract: A control circuit for turning off the electrical power to the drive motor, which reciprocates a polished rod of a pump, when the pump has exhausted the supply of liquid in the well. Simultaneously measuring the polished rod load and rod position and turning off the power when the load is greater than or equal to a preset load and the position is equal to a preset position on the downstroke of the well. A first comparator measures the polished rod load relative to a preset load, and a second comparator measures the polished rod position relative to a preset point so that the power is shut off when the load is greater than or equal to the preset load and the position is equal to the preset point on the downstroke. A set of digital latches act to insure that the load is greater than the preset load for two consecutive strokes before the power is shut off. Measuring when the polished rod load is less than a preset load and the polished rod position is equal to a preset point on the upstroke and turning off power to the well and signalling that an abnormal condition exists at the well. Connections are provided for an external plotter so that a plot of load versus position can be plotted to give a visual representation of the well activity.

Abstract translation: 一种控制电路，用于当泵已经耗尽了井中的液体供应时，关闭驱动马达的电力，该驱动马达使泵的抛光杆往复运动。 同时测量抛光杆的负载和杆位置，并在负载大于或等于预设负载时关闭电源，并且该位置等于井下行程的预设位置。 第一比较器测量相对于预设负载的抛光杆负载，并且第二比较器相对于预设点测量抛光的杆位置，使得当负载大于或等于预设负载时的功率被切断，并且位置 等于下行程中的预设点。 一组数字锁存器用于确保在电源关闭之前两次连续行程的负载大于预设负载。 测量抛光杆载荷是否小于预设载荷，抛光杆位置等于上冲程中的预设点，并关闭井的功率，并指示井处存在异常情况。 为外部绘图仪提供连接，以便绘制负载与位置的关系图以给出井活动的视觉表示。