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Automatic lowering control system and control method of swabbing operation

A technology of control system and control method, which is applied to the automatic control system of drilling, earthwork drilling and production, drilling equipment, etc., and can solve problems such as complex implementation methods, and achieve the effects of easy implementation, improved control accuracy, and accelerated exhaust

Inactive Publication Date: 2017-12-22
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned existing technical solutions, the implementation method is relatively complicated, and its purpose is not to solve the problem of automatic decentralization control in oilfield wells

Method used

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  • Automatic lowering control system and control method of swabbing operation
  • Automatic lowering control system and control method of swabbing operation
  • Automatic lowering control system and control method of swabbing operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 , an automatic lowering control system for pumping operations, including a system control center with a touch-type integrated machine, a suction tensiometer, a suction encoder and a hand-held operator through an A / D input module, a high-speed counting module and a digital signal respectively The input module is connected to the communication input terminal of the system control center; the output terminal of the system control center is respectively connected to the deceleration mechanism and the alarm control through the D / A output module and the digital output module.

[0034] This is a kind of most basic embodiment of the control system of the present invention. The swabbing tensiometer is used to collect the tension change data of the cable of the lowering equipment, and judge the lowering state by obtaining the tension change data when it reaches the liquid surface to realize real-time control on site; Decentralization depth, touch-type all-in-one...

Embodiment 2

[0036] Such as Figure 1 to Figure 3 , an automatic lowering control system for pumping operations, including a system control center with a touch-type integrated machine, a suction tensiometer, a suction encoder and a hand-held operator through an A / D input module, a high-speed counting module and a digital signal respectively The input module communicates with the input terminal of the communication of the system control center; the output terminal of the system control center is respectively connected with the deceleration mechanism and the alarm control through the D / A output module and the digital output module; the system control center is written with a control program PLC controller; the touch-type all-in-one machine and the hand-held operator have manual / automatic switching keys; the deceleration mechanism includes a brake device controlled by a brake air circuit, and the brake air circuit is provided with a quick discharge valve The control cylinder; its power system...

Embodiment 3

[0039] Such as Figures 1 to 4 , an automatic control method for swabbing operations, comprising the following steps:

[0040] In the initialization step, the operator selects and confirms the model through the touch-type all-in-one machine or the hand-held operator, and completes the initialization of the corresponding model of the control system. The initialization content includes the preset constant-speed lowering speed value Vs;

[0041] A lowering control step, the lowering control step includes depth and speed control, cable tension control and automatic lowering control in the liquid surface;

[0042] The depth and speed control, that is, after the lowering action starts, the swabbing encoder collects the pulse signal output by the photoelectric encoder installed on the ground pulley and sends it back to the system control center through the high-speed counting module for processing, and calculates the lowering value. Real-time depth H and speed V, by comparing the re...

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Abstract

The invention discloses an automatic lowering control system and control method of swabbing operation, and relates to the technical field of oil field equipment and facilities. The control system comprises a system control center with a touch all-in-one machine, and a swabbing tensiometer, a swabbing encoder and a handheld operator are connected with the input end of the system control center in a communicational mode through an A / D input module, a high-speed counting module and a digital signal input module respectively; the output end of the system control center is connected with a decelerating mechanism and an alarm in a controlling mode through a D / A output module and a digital output module respectively. Rotating pulse signals of a hay pulley of lowering equipment and the tension of a cable are collected and analyzed, and automatic lowering of oil well equipment is achieved through a central control unit.

Description

technical field [0001] The invention belongs to the technical field of oilfield equipment and facilities, and in particular relates to an automatic decentralization control system and control method for swabbing operations. Background technique [0002] The traditional method of swabbing liquid drainage is to use workover rig or well hoist as the power source, and through the swabbing wire rope wound on the drum, the pump in the wellbore is driven to reciprocate up and down to realize the swabbing operation. The operator realizes the lowering of the swabbing tool through manual operation and brake. The swabbing depth and the depth of the dynamic liquid surface are judged by the operator’s experience. The degree of automation is low, the operation is inconvenient, and the depth error is large. Concentration, the work intensity of the workers is high; manual operation requires a high level of technical skills of the operators, if the operators are not skilled, the speed of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B44/00
CPCE21B44/00
Inventor 宫玉明吴德银聂靖雯刘景成蒋常春
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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