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Gathering and transportation pipe bundles, fouling cores, gathering and transportation agglomeration and descaling devices and systems

A core tube, gathering and transportation technology, which is applied in the direction of drill pipe, casing, wellbore/well parts, etc., can solve the problem that the scaling in the pipeline cannot be fundamentally eliminated, so as to improve the efficiency of accumulation and descaling and simplify the maintenance work , The effect of reducing the scaling tendency

Active Publication Date: 2019-12-06
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a collection and transportation tube bundle, a scale accumulation core barrel, a collection and transportation coalescing and descaling device and system, so as to solve the problem of descaling methods used in oil-water wells and gathering and transportation pipelines in oil fields in the prior art Unable to fundamentally eliminate the problem of fouling in the pipeline

Method used

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  • Gathering and transportation pipe bundles, fouling cores, gathering and transportation agglomeration and descaling devices and systems
  • Gathering and transportation pipe bundles, fouling cores, gathering and transportation agglomeration and descaling devices and systems
  • Gathering and transportation pipe bundles, fouling cores, gathering and transportation agglomeration and descaling devices and systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Take the low-pressure water supply pipeline with an inner diameter of 200mm, an outer diameter of 205mm, and a rated pressure of 2.5MPa to implement agglomeration and scale removal process as an example. The system uses oilfield purified sewage as the water injection source.

[0085] Step 1: Analyze and test the water quality of the injected water, and its salinity is 43912.85mg / L, the alkalinity is relatively large, it is sodium bicarbonate water type; the SI (saturation index) index is 2.31, and there is a strong tendency to scale; Scaling ion Ca 2+ The concentration is 104.56mg / L, and the Mg2+ concentration is 82.41mg / L. The laboratory analyzes the fouling tendency at different flow rates. When the flow rate is less than 2m / s, the fouling trend becomes obviously larger, and the smaller the flow rate, the more obvious the trend .

[0086] Step 2: Use a three-stage collection tube bundle for the gathering and transportation tube bundle. The inner and outer diameters of the ...

Embodiment 2

[0092] Take the low-pressure water supply pipeline with an inner diameter of 200mm, an outer diameter of 205mm, and a rated pressure of 2.5MPa to implement agglomeration and scale removal process as an example. The system uses oilfield purified sewage as the water injection source.

[0093] Step 1: Analyze and test the water quality of the injected water, and its salinity is 43912.85mg / L, the alkalinity is relatively large, it is sodium bicarbonate water type; the SI (saturation index) index is 2.31, and there is a strong tendency to scale; Scaling ion Ca 2+ The concentration is 104.56mg / L, Mg 2+ The concentration is 82.41mg / L. The laboratory analyzes the fouling trend under different flow rates. The fouling trend becomes obvious when the flow rate is less than 2m / s, and the smaller the flow rate, the more obvious the trend.

[0094] Step 2: Use a four-stage collection tube bundle for the gathering and transportation bundles, the shunt pipe 10, the diversion pipe 20, the bottom bran...

Embodiment 3

[0100] Take the low-pressure inlet pipeline of the crude oil processing system with an inner diameter of 150mm, an outer diameter of 155mm, and a rated pressure of 2.5MPa to implement the process of agglomeration and scale removal as an example, and the incoming liquid contains 80% water.

[0101] Step 1: Analyze and test the quality of the free water in the incoming liquid. The salinity is between 10000 and 20000 mg / L, and the Ph value is weakly alkaline. There is a strong tendency to fouling, and the final standing rate of calcium loss is 80%; the laboratory analyzes the fouling trend at different flow rates, and the fouling trend becomes significantly larger when the flow rate is less than 2m / s, and the flow rate decreases. The more obvious.

[0102] Step 2: The four-stage gathering pipe bundle is selected as the gathering pipe bundle, and two sets of parallel processes are used. The inner and outer diameters of the shunt pipe 10, the draft pipe 20 and the bottom branch pipe 30,...

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Abstract

The invention provides a collecting and transporting pipe bundle, a scale-gathering core cylinder, and a collecting and transporting coalescence scale removing device and system. According to the technical scheme, the collecting and transporting pipe bundle comprises a flow dividing pipe, a flow guiding pipe, a plurality of bottom branch pipes, a plurality of top branch pipes and a plurality of sets of vertical pipes; the flow dividing pipe communicates with a liquid coming pipeline, the flow dividing pipe communicates with a liquid discharging pipeline, the multiple bottom branch pipes communicate with the flow dividing pipe, and the multiple top branch pipes communicate with the flow guiding pipe; one end of the each set of vertical pipe communicates with the corresponding bottom branchpipe, and the other end of the each set of vertical pipe communicates with the corresponding top branch pipe; the optimum environment of scale formation of the pipeline is accelerated by artificiallycreating a medium fluid, various scales can be quickly and efficiently precipitated and taken out timely, quickly and conveniently in the collecting and transporting pipe bundle, finally, the medium fluid passes through the collecting and transporting pipe bundle, and then the scale formation trend of the pipeline is greatly reduced. The problem that scale formation in the pipeline cannot be eliminated fundamentally through a scale removing method adopted in an oil-water well and a collecting and transporting pipeline in an oilfield in the prior art is solved.

Description

Technical field [0001] The invention relates to the field of oilfield mining equipment, in particular to a gathering and transporting pipe bundle, a fouling core tube, a gathering and fouling fouling device and system. Background technique [0002] In the process of crude oil exploitation, after the oilfield enters the water injection development stage, water scaling of oil wells and gathering pipelines has become a common problem in oilfield water injection blocks. [0003] Water scaling is a huge hazard. Scaling can occur in surface pipelines and wellbore, causing pipeline blockage and corrosion, limiting the normal use of pipelines, reducing the service life of pipelines, and greatly increasing the maintenance cost of oilfield pipelines; scaling can also occur Occurs in the formation, causing blockage in the area near the well, reducing the permeability of the oil layer and reducing the water absorption capacity of the well. [0004] Descaling is an effective way to ensure stable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B37/00
CPCE21B17/00E21B37/00
Inventor 梁爱国李军强魏永宽刘德国史建英
Owner PETROCHINA CO LTD