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Special alloy wax-proofing tool

A technology for preventing wax and alloys, which is used in cleaning appliances, drilling compositions, drilling equipment, etc.

Active Publication Date: 2012-10-10
NAIR ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used method of well cleaning is thermal washing or chemical paraffin removal, which is effective, but the oil production operation must be stopped and drained for several days before the oil pumping operation can be restarted. At the same time, a large amount of chemical substances are discharged, which seriously affects crude oil production. efficiency and pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A pipeline-type special alloy wax-proof tool (see figure 1 ), consisting of an alloy tube 11, an outer sleeve 12 and a convex combiner 13; the outer sleeve 12 is set on the outside of the alloy tube 11, and then fixedly connected with a convex combiner 13; the alloy tube 11 is made of wax-resistant alloy A , divided into upper section 111 and lower section 112, with a plug 113 in the middle, and the outer walls of the upper section 111 and lower section 112 of the alloy tube have multiple connected grooves 114, and a large number of small holes 115 are opened at the bottom of the groove 114.

[0042]

Embodiment 2

[0044] A coating type special alloy wax-proof tool (see figure 2 ), consisting of an inner tube 21, an outer tube 22 and a convex combiner 23; the outer tube 22 is set outside the inner tube 21, and then fixedly connected with the convex combiner 23; the inner tube 21 is a metal material matrix, and the tube wall There are a large number of small holes, and the inner wall and outer wall of the inner pipe 21 and the inner wall of the outer pipe 22 are sprayed with a wax-proof metal B surface layer.

[0045]

Embodiment 3

[0047] A combined special alloy anti-wax tool, in which the pipeline-type special alloy anti-wax tool (the specific structure is the same as in Example 1) and the coating-type special alloy anti-wax tool (the specific structure is the same as in Example 2) are respectively passed through the joint It is connected in series in the oil well pipeline, located 10 meters and 20 meters below the oil well pump. Among them, the specific composition of the anti-wax alloy A in the pipeline-type special alloy anti-wax tool is (by weight percentage): Ni 23.3, Cu 54.7, Zn 15.1, Sn 1.3, Pb 3.1, Co 1.4, Gd 0.5, Ti 0.5, B 0.10; the metal material substrate in the coated special alloy wax-proof tool is a stainless steel substrate, and the wax-proof alloy formed on the substrate by flame spraying method B surface layer, the thickness of the surface layer is 30 microns, the specific composition of alloy B is (by weight percentage): Cu 88.0, Ni 10.5, Co 1.0, Gd 0.5;

[0048] The depth of the oil ...

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Abstract

The invention provides a special alloy wax-proofing tool; the wax-proofing tool changes the electronic structures of wax molecules through electrochemical action so as to change the aggregation action of wax, efficiently inhibit and retard the coagulation blocking of wax and promote analyzed wax to suspend in liquid in the form of small crystals and flow along with the liquid, thereby efficientlypreventing and retarding the coagulation of wax on a tube wall and a sucker rod; and therefore, the flushing working period of an oil well is prolonged. As the application of a new technology of producing wax removal by crude oil, the special alloy wax-proofing tool avoids the pollution caused by thermal washing or chemical washing besides improving the production efficiency of crude oil, and hasobvious social and economic values.

Description

technical field [0001] The invention relates to downhole machinery for oil exploitation, and in particular provides a special alloy wax-proof tool. Background technique [0002] Crude oil generally contains wax, and there are many oil fields with high wax content in my country. During the oil production operation, the temperature of the crude oil is continuously lowered during the process from the underground to the surface, and the wax in the crude oil will precipitate and condense on the sucker rod and the pipe wall after the temperature reaches the wax precipitation point (generally around 40°C). As a result, the oil pumping operation stopped, and the solidified wax must be removed by "well flushing" to continue oil pumping. Wax removal and prevention have become an important technical link in crude oil production. The most commonly used method of well cleaning is thermal washing or chemical paraffin removal, which is effective, but the oil production operation must be s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/06E21B17/00C09K8/524
Inventor 吕曼棋张海峰胡壮麒
Owner NAIR ENERGY EQUIP
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