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Oil-submersible cable butt joint device used in oil pipe and oil-submersible cable butt joint splitting method

A technology of submersible cable and docking device, applied in cable installation device, cable joint, cable installation and other directions, can solve problems such as damage, reduce production costs, reduce operating costs, and improve pump inspection efficiency.

Pending Publication Date: 2021-11-23
LIAONING HAIDISHENG MECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The beneficial effect of this equipment: the cable is no longer attached to the outside of the oil pipe, but is located in the oil pipe, and through the docking and splitting of the upper cable connector and the lower cable connector, the docking and splitting of the upper cable and the lower cable are realized. It effectively solves the problem of damage to the cable during the lifting and lowering of the operation, greatly reduces the production cost of the submersible electric pump well, reduces the operating cost and improves the pump inspection efficiency

Method used

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  • Oil-submersible cable butt joint device used in oil pipe and oil-submersible cable butt joint splitting method
  • Oil-submersible cable butt joint device used in oil pipe and oil-submersible cable butt joint splitting method
  • Oil-submersible cable butt joint device used in oil pipe and oil-submersible cable butt joint splitting method

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Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a submersible cable docking device used in oil pipes, which includes a cable upper connector 39 and a cable lower connector 40 . Such as figure 1As shown, the cable upper connector 39 includes a weighted rod 1, a female connector 2, a snap ring lock sleeve 3, a snap ring 4, a female connector cylinder 5, a female body 6, a packing ring 9 and an electrical connection ring 10 . The weighting rod 1, the female connecting body 2, the female connecting cylinder 5 and the female body 6 are respectively provided with an inner cavity through up and down, and the weighting rod 1, the female connecting body 2, the female connecting cylinder 5 and the female The bodies 6 are connected in sequence, so that the weighting rod 1 , the female connecting body 2 , the female connecting cylinder 5 and the inner cavity of the female body 6 communicate with each other. Specifically, one end of the weighting rod 1 has a pin thread so as to be threadedly connected t...

Embodiment 2

[0044] Embodiment 2 provides a method for docking and splitting submersible cables in downhole pressurized tubing, which is applied to the docking device for submersible cables in tubing in Embodiment 1, including the following steps:

[0045] S1: Install the lower end cable 38 in the cable lower connector 40, the upper end of the lower end cable 38 extends from the cable hole 26 into the inner cavity of the connection sleeve 29 or the inner cavity of the fixed body 23, passes through the male head assembly 17, and finally the lower end cable 38 is electrically connected with three conductive rings 18;

[0046] S2: The lower joint 25 of the short joint 12 of the cable oil pipe is electrically connected to the upper joint 22 of the oil pipe of the electric submersible pump unit 37, the lower end of the lower end cable 38 is electrically connected to the electric submersible pump unit 37, and the cables fixed together are connected under the The body 40 and the submersible elect...

Embodiment 3

[0052] Embodiment 3 provides a method for connecting and splitting submersible cables in downhole atmospheric pressure tubing. Embodiment 3 is mostly the same as Embodiment 2. A valve, when the oil pipe is lowered, the well fluid is kept under the valve. After the docking, the pump is powered on, and the valve is opened by the pressure generated by the oil well pump to start production. The purpose of normal pressure docking is mainly to ensure the success of docking. Butting under normal pressure can reduce the impact of impurities on the surface of the male connector during docking, reduce the downward resistance of the cable, and improve the success rate of docking.

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Abstract

The invention discloses an oil-submersible cable butt joint device used in an oil pipe and an oil-submersible cable butt joint splitting method. The oil-submersible cable butt joint device used in the oil pipe comprises a cable upper connector and a cable lower connector. The cable upper connector comprises a weight bar, a female connector, a snap ring lock sleeve, a snap ring, a female connecting cylinder, a female body, a packing ring and a power connection ring. Three packing rings and three power connection rings are arranged in the female head body, and the three packing rings and the three power connection rings are distributed alternately. The cable lower connector comprises a cable passing oil pipe nipple, a female head locking body, a lock hook, a male head assembly, conducting rings and a fixed base; the number of the conducting rings is three, and the three conducting rings are distributed at intervals in an insulating mode in the vertical direction. The cable upper connector is inserted into the female head locking body of the cable lower connector, so that the locking hook clamps the clamping ring, and the three power connection rings are in one-to-one correspondence contact with the three conductive rings. Damage to the cable is reduced, the operation cost is reduced, and the pump inspection operation efficiency is improved.

Description

technical field [0001] The invention relates to the field of petroleum equipment, in particular to an oil-submersible cable docking device used in oil pipes and a method for docking and splitting the oil-submersible cable. Background technique [0002] For electric submersible pump wells, the integrity of the cables used to transmit electric energy is the key to ensuring the normal operation of electric submersible pumps. However, in the existing oilfield technology, when these cables are used in the oil well, they are usually fixed on the outer surface of the oil pipe by cable clips. In actual use, it is found that the cable is easily damaged and scratched by the tubing collar during lifting and lowering, especially in inclined wells. Therefore the cables need to be replaced frequently. Because the price of the downhole cable is very expensive, the production cost of the submersible electric pump well is greatly increased. In addition, with the above method of fixing cab...

Claims

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Application Information

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IPC IPC(8): H02G15/08H02G15/18H02G1/14H02G1/00
CPCH02G15/08H02G15/18H02G1/14H02G1/00
Inventor 乔学征王洪阳乔振博王佳琪张宁
Owner LIAONING HAIDISHENG MECHANICAL
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