CN102305042A - Antifreeze technology of blowout preventer and cable for water injection well test - Google Patents

Abstract

The invention relates to the technical field of oil field water well operation, and belongs to an anti-freezing process for a blowout prevention pipe and a cable for testing an oil field water injection well. The anti-freezing device is designed for solving the problems that the cable is easy to freeze and the anti-freezing and anti-blocking pipes are easy to freeze and block during testing construction in winter of the oil field water injection well. The invention mainly comprises a blowout prevention pipe 1, an integrated coil 2, a cable 3, a multi-core wire 4, a heating power supply 5, a generator 6, a cable deicing device 7 and a cable vehicle 8, and the blowout prevention pipe 1 and the cable 3 are matched with the water injection well test for antifreezing and unfreezing processes. The invention is used in the operation of oil field and water well, and has the advantages of low cost, high efficiency and fast cable deicing, anti-freezing and unfreezing of the blowout prevention pipe, and the like.

Description

Antifreeze technology of blowout preventer and cable for water injection well test

Technical field:

The invention relates to the technical field of oilfield water well operation, and belongs to a technique for testing a blowout preventer and a cable antifreeze for an oilfield water injection well.

Background technique:

At present, when oilfield water injection wells are tested and constructed in winter, the problems of cable freezing and nozzle pipe freezing and blockage are prone to occur. The method of overflowing the nozzle pipe is mainly adopted on site. Using this method, after a long period of application, it is found that there are several problems in the following aspects: firstly, the overflow has a great impact on the environment, which is easy to pollute the environment and is not conducive to environmental protection; secondly, it affects the safety of the test construction of the on-site operators . Because, during the test construction in winter, the overflow released from the lubricator is easy to condense into ice quickly, which is very unfavorable for the test workers to climb the lubricator and operate on the well site, and it is easy to slip or fall, and there is a greater safety hazard. Hidden danger; Again, it is difficult to control the size of the overflow, and the overflow is too large, resulting in waste. If the overflow is too small, it will not be able to prevent freezing and blockage, and the anti-nozzle pipe is prone to freezing and blocking.

Invention content:

In order to solve the problem that the cable freezes and the blowout preventer pipe freezes and blocks easily during the winter test construction of the water injection well in the oil field, the present invention provides a low-cost, safe and efficient fast cable deicing, and can make the blowout preventer Antifreeze process of blowout preventer and cable for water injection well test with pipe antifreeze and thaw.

The present invention is realized by the following devices: a blowout preventer, an integrated coil, a cable, a multi-core wire, a heating power supply, a generator, a cable deicing device and a cable car, wherein the integrated coil surrounds the blowout preventer, The integrated coil is connected to the output end of the heating power supply through a multi-core wire, the input end of the heating power supply is connected to the generator, and the cable deicing device is fixed at the position where the cable is retracted and released in the cable car; the present invention is realized through the following steps:

a. First, the heating power supply converts the DC power provided by the generator into a high-frequency current, and supplies it to the integrated coil. The integrated coil and the nozzle form an electromagnetic induction effect, and convert the high-frequency current provided by the heating power supply into a high-frequency electromagnetic field. Through the integrated coil, high-frequency eddy currents are generated around the anti-nozzle pipe, and the anti-nozzle pipe is heated to thaw the anti-nozzle pipe;

b. Then the cable car controls the retraction and release of the cable, and the cable deicing device is fastened to the cable, so that the floating ice of the cable is removed by the cable deicing device during the traveling process;

c. Finally, the cable deicing device heats the treated cable with hot air to remove the ice on the cable.

Compared with the prior art, the present invention has the following advantages:

1) The cable deicing device is simple in structure, low in cost and light in weight, and can achieve the effect of quickly deicing the cable;

2), the process is easy to implement, ensures the safety of the operation, and has a good thawing effect on the blowout preventer.

Description of drawings:

Fig. 1 is a schematic diagram of field application of the present invention.

Detailed ways:

Below in conjunction with accompanying drawing, the present invention is described further: the present invention is realized by following device: blowout preventer 1, integrated coil 2, cable 3, multicore electric wire 4, heating power supply 5, generator 6, cable deicing The device 7 and the cable car 8 are composed of the integrated coil 2 surrounding the blowout preventer 1, the integrated coil 2 is connected to the output end of the heating power supply 5 through a multi-core wire 4, and the input end of the heating power supply 5 is connected to the generator 6 , the cable deicing device 7 is fixed on the position of the cable 3 in the cable car 8; the present invention is achieved through the following steps:

a. First, the heating power supply 5 converts the direct current provided by the generator 6 into a high-frequency current, and then provides it to the integrated coil 2. The integrated coil 2 and the nozzle 1 form an electromagnetic induction effect, and the high-frequency current provided by the heating power supply 5 It is transformed into a high-frequency electromagnetic field, through the integrated coil 2, a high-frequency eddy current is generated around the nozzle 1, and the nozzle 1 is heated, so that the nozzle 1 is thawed;

b. Then the cable car 8 controls the retraction and release of the cable 3, and the cable deicing device 7 is fastened on the cable 3, so that the floating ice of the cable 3 is removed by the cable deicing device 7 during the traveling process;

c. Finally, the cable deicing device 7 heats the treated cable 3 with hot air to remove the ice debris on the cable 3 .

Claims (1)

1. the supporting antifreeze technology of injection well testing with lubricator and cable; Above-mentioned technology is through realizing with lower device: lubricator (1); Integrated coil (2); Cable (3); Multiple core cord (4); Heating power supply (5); Generator (6); Cable ice remover (7) and cable car (8) are formed; Wherein integrated coil (2) is centered around lubricator (1) on every side; Integrated coil (2) links to each other through multiple core cord (4) with the output of heating power supply (5); The input of heating power supply (5) is connected with generator (6), and cable ice remover (7) is fixed on the position of the interior folding and unfolding cable of cable car (8) (3); It is characterized in that: above-mentioned technology realizes through following steps:

A, after at first heating power supply (5) direct current that generator (6) is provided is converted into high frequency electric; Offer integrated coil (2); Integrated coil (2) forms electromagnetic induction effect with lubricator (1); The high frequency electric that heating power supply (5) is provided is converted into the electromagnetic field of high frequency; Make lubricator (1) upwards produce high-frequency vortex on every side through integrated coil (2); To lubricator (1) heating, lubricator (1) is thawed;

B, the folding and unfolding of cable car (8) control cables (3) then, cable ice remover (7) is held on the cable (3), and cable (3) its floating ice in traveling process is removed by cable ice remover (7);

C, last, cable de-icing device (7) carries out the hot blast heating again to the cable (3) after handling, and removes the ice quarrel on the cable (3).

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