公开(公告)号：US3918843A

公开(公告)日：1975-11-11

申请号：US45285174

申请日：1974-03-20

Applicant: DRESSER IND

Inventor： DOUGLAS BOBBY L ,  WILLIAMS ROBERT C

IPC: E21B47/00 ,  F04B47/02 ,  F04B49/02 ,  F04B49/06 ,  F04B49/10 ,  F04B49/00

CPC classification number: F04B49/106 ,  E21B47/0008 ,  F04B47/02 ,  F04B49/02 ,  F04B49/065 ,  F04B2201/02071 ,  F04B2205/13 ,  F04B2205/16

Abstract: A valve in the production flow line of an oil well closes a reed switch indicative of fluid being pumped through the line. The switch closure activates a first oscillator whose count is compared with a variable frequency oscillator having a frequency of approximately one half that of the first oscillator. The comparison is made over a given period of time to ascertain the percentage of time the valve has been open and passing fluid. Theoretically, the valve should be open 50 percent of the time because 50 percent of the time is taken on the downstroke of the pumping assembly when no production is occurring. The integrated timer is adjusted to shut down the system when the percentage of time the valve is open drops to the preselected amount, usually equal to or less than 50 percent. In response to the integration timer producing a signal, a shutdown timer is turned on which restarts the cycle after a preselected amount of time. When the system is restarted by the shutdown timer, a pump-up timer is turned on which is adjusted to allow for a desired pump-up time. As the pump-up timer is allowing the system to recycle, the integration timer is reset and the recycling is completed if the requirements of the integration timer are met. Otherwise, the unit is shut down again and the system recycled. A variable electronic scaler is connected to the output of the integration timer which monitors the output signals from the integrator timer. After the preset number of times the integration timer produces a signal, the scaler turns off the whole system. It can then be restarted manually. This provides a safety device for equipment failure such as breaking of the sucker rod. Means are also provided for recording the various timed cycles and also for monitoring the number of signals transmitted to the scaler, thus being indicative of the number of times the system has automatically shut down.

Abstract translation: 油井生产流水线中的阀门关闭一个指示流经泵管的流体的簧片开关。 开关闭合激活第一振荡器，其计数与具有大约是第一振荡器的一半频率的可变频率振荡器进行比较。 在给定的时间内进行比较，以确定阀门打开和通过流体的时间百分比。 理论上，阀门应该打开50％的时间，因为在没有生产的时候，50％的时间是在泵组件的下冲程中进行的。 当阀门打开的时间百分比下降到预先选定的数量时，通常调节关闭系统的时间，通常等于或小于50％。 响应于产生信号的积分定时器，关闭定时器被打开，在预选的时间量之后重新启动循环。 当系统由关机定时器重新启动时，启动一个抽油定时器，该定时器被调节以允许期望的泵送时间。 由于抽油机定时器允许系统回收，如果满足积分计时器的要求，则积分计时器被复位，并且回收完成。 否则，本机再次关闭，系统回收。 可变电子缩放器连接到积分计时器的输出，该定时器监视来自积分器定时器的输出信号。 在集成定时器产生信号的预设次数之后，缩放器关闭整个系统。 然后可以手动重启。 这提供了用于设备故障的安全装置，例如抽油杆的断裂。 还提供了用于记录各种定时周期并且还用于监视发送到缩放器的信号的数量的装置，因此指示系统自动关闭的次数。

公开(公告)号：US3701382A

公开(公告)日：1972-10-31

申请号：US3701382D

申请日：1971-06-02

Applicant: DRESSER IND

Inventor： WILLIAMS ROBERT C

IPC: E21B33/129 ,  E21B33/12

CPC classification number: E21B33/1294

Abstract: A packer is provided, one or more of which may be used to seal between a well casing and a tubing string placed inside the well casing. The well packer is provided with a bypass valve to permit flow of fluid through the packer inside the packing element to facilitate lowering the packer into the well and to facilitate lifting the packer out of the well. The pipe below the packer must be anchored to withstand upstrain exerted in tubing above the packer to cause setting of the packer, closing of the bypass valve and holding force to hold the packer in position in the casing after setting. The packer may be held in a retracted position, while lowering into the well, by screws or pins which shear when the setting upstrain is applied to the packer. A latch is provided to lock the packer in retracted position to hold the bypass valve open while the packer is being lifted from the well.

公开(公告)号：US3517742A

公开(公告)日：1970-06-30

申请号：US3517742D

申请日：1969-04-01

Applicant: DRESSER IND

Inventor： WILLIAMS ROBERT C

IPC: E21B33/12 ,  E21B33/129

CPC classification number: E21B33/1293 ,  E21B33/1216 ,  E21B33/129

公开(公告)号：US3926409A

公开(公告)日：1975-12-16

申请号：US45223474

申请日：1974-03-18

Applicant: DRESSER IND

Inventor： ABNEY DAVE L ,  WILLIAMS ROBERT C ,  GILBERT HORACE E

IPC: E21B33/12 ,  E21B34/12 ,  E21B43/04 ,  F16K31/44

CPC classification number: E21B33/12 ,  E21B34/12 ,  E21B43/045

Abstract: The apparatus and method provides the ability to selectively treat a producing zone in a well and to gravel pack an annulus in the well casing outside a screen type liner pipe. A tubing string extending from the surface of the well bore is connected to a packer by a crossover valve. Flow down the tubing string is directed to an annulus below the packer, then inwardly through the screen type liner, then upward through the crossover into the annulus above the packer and then to the earth''s surface. Communication from the crossover to the annulus above the packer may be selectively closed to permit a treating pressure to be exerted down the tubing to force a treating fluid into the producing zone. The treating pressure is isolated from the casing above the packer to protect the casing above the packer.

公开(公告)号：CA910810A

公开(公告)日：1972-09-26

申请号：CA910810D

Applicant: DRESSER IND

Inventor： WILLIAMS ROBERT C

IPC: E21B33/12 ,  E21B33/129

公开(公告)号：CA970682A

公开(公告)日：1975-07-08

申请号：CA172852

申请日：1973-05-31

Applicant: DRESSER IND

Inventor： WILLIAMS ROBERT C

IPC: E21B17/07

Abstract: Disclosed herein is an improved borehole shock absorber for use between down hole well tools such as between a hydraulic pump and packer to absorb the shock loading created by the pump and, thereby, avoid damage to the packer. The shock absorber includes at least two relatively moveable members, one of which is connected to the packer and one to the pump with a shock absorbing material located therebetween arranged to absorb the shock created by the pump. One of the members is to be provided with a plurality of circumferentially spaced, elongated slots. The slots are located in the member adjacent the rubber so that when the shock absorbing material has been loaded, deformation in the slotted member can occur to permit additional deformation of the rubber and absorb shocks of a magnitude beyond the normal loading.

公开(公告)号：CA948555A

公开(公告)日：1974-06-04

申请号：CA140965

申请日：1972-05-01

Applicant: DRESSER IND

Inventor： WILLIAMS ROBERT C

IPC: E21B33/129