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Hydrogen removal system of continuous oil pipe and method for removing hydrogen of continuous oil pipe by using system

A hydrogen system and oil pipe technology, which is applied in the field of hydrogen removal system of coiled tubing, can solve problems such as technical difficulty, and achieve the effects of increasing safety risk, reducing operation risk and reducing service life.

Active Publication Date: 2019-09-03
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for coiled tubing, due to its long length (generally thousands of meters) and large volume, the heat treatment process of heating and heat preservation in an oven is technically difficult.

Method used

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  • Hydrogen removal system of continuous oil pipe and method for removing hydrogen of continuous oil pipe by using system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The hydrogen removal system of embodiment 1 coiled tubing

[0030] The dehydrogenation system of coiled tubing described in this embodiment, see figure 1 , including an inverted pipe rack 1, a hydraulic press 2, a gas buffer tank 3, a nitrogen generator 4, a pressure regulating pump 5 and a nitrogen heater 6; the hydraulic press 2 is connected to a water tank 21, and the inverted pipe rack 1 is provided with a reel 11. Coiled tubing 12 to be dehydrogenated is wound on the reel 11, the periphery of the coiled tubing 12 wound on the reel 11 is covered with thermal insulation cotton 13, and one end of the coiled tubing 12 is connected to the three-way valve 7, The other two connection ports of the three-way valve 7 are respectively connected with the hydraulic press 2 and the nitrogen heater 6, the nitrogen heater 6 is connected with the nitrogen generator 4, and the other end of the coiled tubing 12 is connected with the gas buffer tank 3 , the gas buffer tank 3 is conne...

Embodiment 2

[0032] Embodiment 2 The method for dehydrogenating the coiled tubing using the dehydrogenation system of the coiled tubing described in Embodiment 1

[0033] The method for dehydrogenating the coiled tubing by using the dehydrogenation system of the coiled tubing described in Embodiment 1 described in this embodiment comprises the following steps:

[0034]1) Union welding process: take out the coiled tubing 12 to be dehydrogenated after working in a hydrogen sulfide environment, wind it on the reel 11, and install the reel 11 on which the coiled tubing 12 has been wound on the inverted tube stand 1 , welding the first union 121 at one end of the coiled tubing 12, and welding the second union 122 at the other end;

[0035] 2) System connection process: connect each component according to the dehydrogenation system of the coiled tubing;

[0036] 3) Flushing process: disconnect the connection between the second union 122 and the sixth pipeline 86, close the stop valve 10 on the ...

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Abstract

The invention belongs to a steel pipe corrosion prevention process, and relates to a hydrogen removal system of a continuous oil pipe and a method for removing hydrogen of the continuous oil pipe by using the system. The hydrogen removal system of the continuous oil pipe comprises an inverted pipe frame, a hydraulic press, a gas buffer tank, a nitrogen making machine, a pressure adjusting pump anda nitrogen heater, wherein a winding drum is arranged on the inverted pipe frame, the continuous oil pipe with the hydrogen to be removed is wound around the winding drum, one end of the continuous oil pipe is connected with a three-way valve, the other two connecting ports of the three-way valve are connected with the hydraulic press and the nitrogen heater correspondingly, the nitrogen heater is connected with the nitrogen making machine, the other end of the continuous oil pipe is connected with the gas buffer tank, the gas buffer tank is connected with the pressure adjusting pump, and thepressure adjusting pump is connected with the nitrogen heater. By adopting the method, effective dehydrogenation treatment can be carried out on a carbon steel or low-alloy steel continuous oil pipewhich each reaches a kilometer and is subjected to operation in the hydrogen sulfide environment, so that hydrogen embrittlement is prevented, the service life of the pipe is prolonged, and the operation risk is reduced.

Description

technical field [0001] The invention belongs to steel pipe anti-corrosion technology, relates to a coiled tubing hydrogen removal system and a method for using the system to remove hydrogen from the coiled tubing, in particular to a coiled tubing hydrogen removal system and using the system for operating in an environment containing hydrogen sulfide After the coiled tubing for dehydrogenation method. Background technique [0002] Coiled tubing is a pipe made of low-carbon alloy steel. It has good flexibility. It is also called flexible tubing. A coil of coiled tubing is several kilometers long and can replace conventional tubing for many operations. Coiled tubing operation equipment It has the characteristics of working under pressure and continuous lifting. The equipment is small in size, fast in operation cycle and low in cost. [0003] In the acidic working environment containing hydrogen sulfide, hydrogen sulfide reacts with coiled tubing materials to generate hydrogen ...

Claims

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Application Information

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IPC IPC(8): B08B9/032B08B9/057B08B13/00
CPCB08B9/0321B08B9/057B08B13/00
Inventor 毕宗岳李博锋李旭阳田小江赵勇马佼佼王一岑刘新成张君赵西岐王涛施宜君任永峰董超赵斌孙文盛张高兰
Owner BC P INC CHINA NAT PETROLEUM CORP