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Alloy for scale prevention of oilfield pipe string and pipe nipple device made of same

An alloy and pipe string technology, applied in the field of short joint devices, can solve the problems of corrosion, oil field pipe string scaling, etc.

Inactive Publication Date: 2019-01-29
陕西速源节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an alloy used for oilfield pipe string anti-scaling and a pup joint device made of it in order to solve the above problems, so as to solve the problems of oil field pipe string fouling and serious corrosion, and realize stable oil production without additional source of power, energy saving and environmental protection

Method used

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  • Alloy for scale prevention of oilfield pipe string and pipe nipple device made of same
  • Alloy for scale prevention of oilfield pipe string and pipe nipple device made of same
  • Alloy for scale prevention of oilfield pipe string and pipe nipple device made of same

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the present invention will be further described: a kind of alloy that is used for the anti-scaling of oilfield tubing column, and its chemical formula of described alloy is Ti x Ni x-3 Nb 9 , where X=43~50, according to the composition ratio of Ti, Ni, Nb, select the elemental titanium, nickel, and Ni with a purity of more than 99wt.% to smelt into a cylindrical shape.

[0013] Such as figure 1 As shown, a short joint device made of the alloy in the above technical solution, the short joint device includes a short joint (1), the front end of the short joint (2) has a number of screen holes (3), and the rear end of the short joint (4) is solid, the front end (2) of the short joint has a notch, and the rear end (4) of the short joint has a protrusion, and the notch is matched with the protrusion.

[0014] In one embodiment, Ti 47 Ni 44 Nb 9 , where X=47, according to the composition ratio of Ti, Ni, Nb, the elemental t...

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Abstract

The invention provides an alloy for scale prevention of an oilfield pipe string. The alloy has a chemical formula of Ti<x>Ni<x-3>Nb<9>, wherein X is equal to 43-50. According to the invention, elemental titanium, nickel and niobium with purity of more than 99 wt.% are selected according to the composition proportions of Ti, Ni and Nb and are smelted into a cylindrical shape. The invention also provides a pipe nipple device made of the alloy. In use, the pipe nipple device is installed on both ends of the oilfield pipe string to overcome the problems of severe scaling and corrosion of the oilfield pipe string and the like and to achieve stable oil recovery; and no additional power source is needed, so energy conservation and environmental protection are realized.

Description

technical field [0001] The invention relates to the technical field of oil field equipment, in particular to an alloy used for anti-scaling of oil field pipe strings and a pup joint device made thereof. Background technique [0002] During the use of oilfield pipe strings, especially in the middle and late stages, scaling at the pipe strings is becoming more and more serious. After waxing and scaling of the pipe strings, the diameter of the pipe strings will shrink, and the flow cross-sectional area will become smaller, resulting in pressure loss and displacement. Reduction and pipeline blockage, the descaling methods currently used include mechanical scraping, hot washing, electric heating and chemical descaling methods. The disadvantages are high cost, heavy workload and frequent descaling, which seriously affect production efficiency. At the same time, when the temperature When the temperature allowed by the metal is exceeded, it will cause bulging and pipe burst accident...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C19/03E21B17/02E21B37/00
CPCC22C19/03C22C30/00E21B17/02E21B37/00
Inventor 陈育通郑相军
Owner 陕西速源节能科技有限公司