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Skid-mounted water injection well circulating well washing device and circulating well washing technique

A technology for water injection and well cleaning, which is applied in the directions of flushing wellbore, wellbore/well components, and earth-moving drilling, etc., and can solve the problems of large water consumption, long construction period, environmental pollution, etc.

Active Publication Date: 2015-12-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of large water consumption, numerous steps, long construction period and easy environmental pollution when cleaning the existing water injection wells

Method used

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  • Skid-mounted water injection well circulating well washing device and circulating well washing technique
  • Skid-mounted water injection well circulating well washing device and circulating well washing technique
  • Skid-mounted water injection well circulating well washing device and circulating well washing technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a skid-mounted water injection well circulation well cleaning device includes an oil sludge water separation tank 1, an integrated coarse filter tank 2 connected with the oil sludge water separation tank 1, and an integrated fine filter tank connected with the integrated coarse filter tank 2 3. There is a first water inlet 101 on the side wall of the sludge-water separation tank 1, a first water outlet 102 on the top, a second water inlet 201 on the top of the integrated coarse filter tank 2, and a second outlet on the bottom. The water port 202, the top of the integrated fine filter tank 3 is provided with a third water inlet 301, and the bottom end is provided with a third water outlet 302;

[0035] The first water inlet 101 is connected to the wellhead drainage pipeline 4, the first water outlet 102 and the second water inlet 201 are connected through the first pipeline 103, and the second water outlet 202 and the third water inlet 301 are ...

Embodiment 2

[0041] On the basis of Example 1, it needs to be further explained that, as figure 2 As shown, the sludge water separation tank 1 is provided with a silt barrel 111 coaxial with the oil sludge water separation tank 1, and the surface of the silt bucket 111 is provided with a plurality of flow holes, and the bottom of the silt bucket 111 is a sand collecting tank. Zone 115, the top of the sediment bucket 111 is covered with an oil removal filler layer 117, and the top axial center of the sediment bucket 111 is connected with a water outlet conduit 116, and the water outlet conduit 116 extends out of the top of the sludge-water separation tank 1 and the second water outlet. 202 connected.

[0042] Concretely, the sludge water separation tank 1 is provided with a sediment bucket 111 coaxial with the sludge water separation tank 1, and the sediment bucket 111 consists of a top cover 112 with a trapezoidal cross section and a rectangular retaining ring with a cross section from to...

Embodiment 3

[0046] On the basis of Example 2, such as image 3 , Figure 4 As shown, in order to further purify the well washing water so that it reaches the standard of recycling, the integrated coarse filter tank 2 and the integrated fine filter tank 3 are all provided with a filter material layer 10 along the radial direction, and the filter material layer 10 The top is covered with an oil removal filter material layer 6.

[0047] The well washing water enters the integrated coarse filter tank 2 through the water outlet conduit 116 after passing through the vortex, micro vortex, inertia, centrifugal force, buoyancy and gravity of the oil sludge water separation tank 1, and enters the integrated coarse filter tank 2. After the filter material layer 10 absorbs and removes the large particle impurities in the well washing water, the oil and gas in the well washing water are removed through the oil removal filter material layer 6, and then enters the integrated fine filter tank 3, and in ...

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Abstract

The invention provides a skid-mounted water injection well circulating well washing device and a circulating well washing technique. Well washing water returned by a water injection well is treated by an oil-mud-water separation tank, and the treated well washing water is transmitted to an integrated coarse filtering tank and an integrated fine filtering tank in sequence, and well washing water whose water quality meets standards is transmitted to a mouth of a well again, so that the well washing water is recycled.

Description

Technical field [0001] The present invention belongs to the technology field of oil field water -injection wells, which involves a cycle -looping well washing device and circulating well washing process method. Background technique [0002] Watering well washing well is an effective means to purify the well. Therefore, it is a daily main task of water injection of oil fields. When routine washing well, the pressure of the water injection well is first leaked to 0, and then the cement pump truck is used to pull the pull.The water is injected into the water injection well, and the water in the well in the well is replaced on the ground. The entire process requires a lot of water resources. At the same time, it is discharged into the ground washing water containing crude oil and other debris, which can easily cause environmental pollution. Invention content [0003] The purpose of the present invention is to solve the problem of large water consumption, many steps, long constructio...

Claims

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Application Information

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IPC IPC(8): E21B21/00
Inventor 宋昭杰常彦荣陆红军姚斌王守虎张随望陆小兵王勇隋蕾胡改星
Owner PETROCHINA CO LTD
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