An antifreeze device and antifreeze method for a dual-medicine oil well head dosing pipeline

A technology of antifreeze device and pipeline, which is applied in wellbore/well components, earthwork drilling, cleaning equipment, etc., can solve the problems of large construction volume, low degree of automation, and large manual workload of electric tracing cables, and reduce construction costs. , the effect of simplifying the structure and saving energy

Active Publication Date: 2022-03-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an antifreeze device and antifreeze method for the wellhead dosing pipeline of a dual-medicine oil well. The second purpose is to overcome the problems of large manual workload and low degree of automation in the traditional antifreeze method

Method used

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  • An antifreeze device and antifreeze method for a dual-medicine oil well head dosing pipeline
  • An antifreeze device and antifreeze method for a dual-medicine oil well head dosing pipeline
  • An antifreeze device and antifreeze method for a dual-medicine oil well head dosing pipeline

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no. 1 approach

[0039] refer to figure 1 , the first embodiment of the present invention relates to an antifreeze device for the wellhead dosing pipeline of a dual-medicine oil well, which includes an electrically connected upper computer 1 and a lower computer 2, and also includes a No. 1 medicine tank 3 and a No. 2 medicine tank 7. The No. 1 medicine tank 3 is connected to the suction port of the same metering plunger pump 5 through the No. 1 solenoid valve 4, and the No. 2 medicine tank 7 is respectively connected to the same metering plunger pump 5 through the No. 2 solenoid valve 8, and the discharge port of the metering plunger pump 5 passes through the wellhead The solenoid valve 6 is connected to the target well 9;

[0040] The No. 1 solenoid valve 4 , the metering plunger pump 5 , the wellhead solenoid valve 6 , and the No. 2 solenoid valve 8 are respectively electrically connected to the lower computer 2 .

[0041] It should be noted that in this embodiment, No. 1 medicine tank 3 i...

no. 2 approach

[0047] The second embodiment of the present invention relates to an antifreeze device for the dosing pipeline at the wellhead of a dual-agent oil well, which includes an electrically connected upper computer 1 and a lower computer 2, and also includes a No. 1 medicine tank 3 and a water-based hydrogen sulfide inhibitor. There is the No. 2 medicine tank 7 of the oil-based paraffin-repellent agent, the No. 1 medicine tank 3 is connected to the same metering plunger pump 5 through the No. 1 solenoid valve 4, and the No. 2 medicine tank 7 is respectively connected to the same metering plunger pump 5 through the No. 2 solenoid valve 8 The suction port of the metering plunger pump 5 is connected to the target well 9 through the wellhead solenoid valve 6;

[0048] The No. 1 solenoid valve 4 , the metering plunger pump 5 , the wellhead solenoid valve 6 , and the No. 2 solenoid valve 8 are respectively electrically connected to the lower computer 2 .

[0049] Specifically, the upper co...

no. 3 approach

[0053] This embodiment provides an antifreeze method for the antifreeze device of the wellhead dosing pipeline of a dual-medicine oil well, such as figure 2 shown, including the following steps:

[0054] Step S1, estimate the purge duration in advance, set the purge time and purge duration of the oil-based wax remover and anti-wax agent on the upper computer 1, and send the purge time and purge duration to the lower computer 2;

[0055] Step S2, the lower computer 2 controls the No. 2 solenoid valve 8 to close, and at the same time controls the No. 1 solenoid valve 4, the metering plunger pump 5, and the wellhead solenoid valve 6 to open, and the water-based hydrogen sulfide inhibitor in the No. 1 medicine tank 3 is metered. The plug pump 5 sucks and discharges into the oil casing annulus of the target well 9 to complete the injection of the water-based hydrogen sulfide inhibitor;

[0056] Step S3, the lower computer 2 controls the No. 1 solenoid valve 4 and the metering plu...

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Abstract

The invention provides an anti-freezing device and an anti-freezing method for the wellhead dosing pipeline of a double-medicine oil well. During operation, only a purging time needs to be set on a remote control terminal, and an oil-based wax and anti-wax agent with anti-freezing properties is used to purge the entire dosing. In the pipeline system, after the entire dosing pipeline is filled with oil-based wax remover, RTU controls the metering plunger pump and other solenoid valves to close to complete antifreeze. The invention overcomes the disadvantages of using electric tracing tape for antifreeze and heat preservation in the previous dosing pipeline from the dosing device to the wellhead. Anti-freeze blocking, simple operation, greatly simplifying the structure of the dosing device, saving energy consumption, reducing construction costs, and ensuring the reliable operation of the dosing device on site in winter.

Description

technical field [0001] The invention belongs to the technical field of oil recovery, and in particular relates to an antifreeze device and an antifreeze method for a wellhead chemical dosing pipeline of a dual-medicine oil well. Background technique [0002] In the process of oil production in the oil field, the downhole tubing string and oil gathering pipeline of the oil well may be affected by wax deposition, causing many problems such as abnormal production of the oil well or high back pressure at the wellhead. At the same time, some oil wells are also accompanied by hydrogen sulfide overflow. The health of employees on site poses a serious threat. In order to effectively avoid the harm of hydrogen sulfide to the wellbore and personnel and prevent the formation of wellbore wax scale, thereby reducing the back pressure of the wellhead and maintaining the normal production of the oil well, the most used method at present is chemical anti-wax, that is, adding oil-based anti-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/06
CPCE21B37/06
Inventor 田殿龙李永长杨仓海樊晨于洋魏小林白晓红李丽
Owner PETROCHINA CO LTD
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