阅读说明：本技术 一种高温电机潜油电缆连接装置 (High-temperature motor oil-submersible cable connecting device ) 是由 季文纲 彭兵 张义顺 孙兴革 王健康 高洪丰 赵金磊 于 2020-06-23 设计创作，主要内容包括：本发明公开一种高温电机潜油电缆连接装置,涉及石油开采潜油电泵电缆联接配套设施技术领域,包括引接电缆、动力电缆和冷压套管；引接电缆与动力电缆分别包括三根电缆芯,每根电缆芯均包括由内向外的导电体、绝缘层和护套层,三根电缆芯的外部还设置有金属铠；冷压套管将引接电缆与动力电缆的导电体连接成一体；冷压套管、导电体和绝缘层外部设置有绝缘填充层；绝缘填充层外部设置有内层热收缩套管；内层热收缩管外设置有外层热收缩管；外层热收缩管的两端分别设置有一补偿卡箍,补偿卡箍与外层热收缩管之间设置有密封圈。解决了传统电缆密封装置在高温下运行下不可靠,造成井液或气体进入电缆密封装置导致电缆短路击穿的缺陷。(The invention discloses a high-temperature motor submersible cable connecting device, which relates to the technical field of cable connection supporting facilities of oil exploitation submersible electric pumps, and comprises a leading cable, a power cable and a cold-pressed sleeve; the leading cable and the power cable respectively comprise three cable cores, each cable core comprises an electric conductor, an insulating layer and a sheath layer from inside to outside, and metal armoring is arranged outside the three cable cores; the cold-pressed sleeve connects the lead cable and the electric conductor of the power cable into a whole; an insulating filling layer is arranged outside the cold-pressed sleeve, the conductor and the insulating layer; an inner heat shrinkable sleeve is arranged outside the insulating filling layer; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; and two ends of the outer heat-shrinkable tube are respectively provided with a compensation clamp, and a sealing ring is arranged between the compensation clamp and the outer heat-shrinkable tube. The defect that the traditional cable sealing device is unreliable in operation at high temperature, so that well liquid or gas enters the cable sealing device to cause short-circuit breakdown of a cable is overcome.)

1. A high-temperature motor oil-submersible cable connecting device is characterized by comprising a leading cable, a power cable and a cold-pressed sleeve; the leading cable and the power cable respectively comprise three cable cores, each cable core comprises an electric conductor, an insulating layer and a sheath layer from inside to outside, and metal armoring is arranged outside the three cable cores; the cold-pressed sleeve connects the lead cable and the conductor of the power cable into a whole; an insulating filling layer is arranged outside the cold-pressed sleeve, the conductor and the insulating layer; an inner heat shrinkable sleeve is arranged outside the insulating filling layer; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; the two ends of the outer heat-shrinkable tube are respectively provided with a compensation clamp, and a sealing ring is arranged between the compensation clamp and the outer heat-shrinkable tube.

2. The high temperature motor submersible cable connection device of claim 1 where the outer heat shrink tube and the compensation clamp have reinforcement layers disposed on the outside.

3. The high temperature motor submersible cable connection device of claim 2 where the reinforcement layer is a braided glass ribbon or a polytetrafluoroethylene ribbon.

4. The high temperature motor submersible cable connection device of claim 1 where the cold pressed casing is a copper tubing.

5. The high-temperature motor submersible cable connection device according to claim 1, wherein the insulating filler layer is a polyimide film, a pressure sensitive adhesive tape, or a polytetrafluoroethylene tape.

6. The high-temperature motor submersible cable connection device according to claim 1, wherein the inner heat shrinkable tube and the outer heat shrinkable tube are teflon heat shrinkable tubes.

7. The high-temperature motor submersible cable connection device according to claim 1, wherein the sealing ring is a viton ring and the compensation clamp is a constant pressure clamp with compensation capability.

8. The high temperature motor submersible cable connection device of claim 1 where the outer heat shrink tube and the compensation collar are externally provided with a shroud.

9. The high-temperature motor submersible cable connection device as claimed in claim 8, wherein a fixing clip is provided at each end of the shield, and the fixing clips are used for fixing the shield to the metal armor.

Technical Field

The invention relates to the technical field of cable connection supporting facilities of an oil exploitation electric submersible pump, in particular to a high-temperature motor electric submersible cable connecting device.

Background

The high-temperature electric submersible pump is efficient and reliable lifting equipment in a Steam Assisted Gravity Drainage (SAGD) mining technology, a high-temperature electric submersible cable is an electric energy transmission channel of the high-temperature electric submersible pump, and the underground part of an electric submersible pump unit and the high-temperature electric submersible cable work in a high-temperature environment at about 250 ℃. In order to facilitate the transportation of the electric submersible pump unit and improve the field operation efficiency, the high-temperature submersible motor in the high-temperature electric submersible pump unit is provided with a lead cable with a length of tens of meters during production and manufacturing. In the well operation of the submersible electric pump, a power cable is required to be connected with a lead cable. The existing high-temperature oil-submersible cable is a three-phase wire and comprises three cable cores, wherein a multi-layer insulating layer and a jacket layer are sequentially wrapped outside the core wire of each cable core, and the three cable cores are wrapped by stainless steel armors. When the power cable is connected with the leading cable, a certain length of steel armor needs to be stripped, and then a special high-temperature cable joint sealing device is adopted. The cable joint sealing structure of the high-temperature electric submersible pump mentioned in patent No. CN201510632986.9 is a structure adopted in domestic production at present, although the mechanism adopts a double sealing technology of compensation sealing and insulating oil filling, the phenomenon of short circuit failure is caused when well liquid or gas enters the cable joint sealing mechanism in the production process, equipment damage is brought, and crude oil production reduction is further caused; meanwhile, two ends of the high-temperature cable joint sealing mechanism are provided with three exposed cable cores with the lengths of about 300mm-400mm, stainless steel armor protection is not adopted, and the exposed cable cores are subjected to insulation cracking under the multiple actions of electrical stress, thermal stress and chemical substances.

Therefore, a reliable and simple high-temperature cable connection mechanism needs to be designed, which not only ensures the insulation sealing performance of the connection part, but also ensures that the cable at the connection part has high enough mechanical strength to resist multiple actions of electrical stress, thermal stress and chemical substances, so that the high-temperature electric submersible pump can normally work.

Disclosure of Invention

In order to solve the technical problems, the invention provides a high-temperature motor submersible cable connecting device, which is used for overcoming the problems of liquid leakage and gas leakage of the existing high-temperature cable joint sealing mechanism, improving the insulating sealing performance of the connecting part of a high-temperature cable and ensuring that the cable at the connecting part has high enough mechanical strength to resist electric shock stress and thermal stress and has multiple functions of chemical substances.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a high-temperature motor submersible cable connecting device, which comprises a leading cable, a power cable and a cold-pressed sleeve; the leading cable and the power cable respectively comprise three cable cores, each cable core comprises an electric conductor, an insulating layer and a sheath layer from inside to outside, and metal armoring is arranged outside the three cable cores; the cold-pressed sleeve connects the lead cable and the conductor of the power cable into a whole; an insulating filling layer is arranged outside the cold-pressed sleeve, the conductor and the insulating layer; an inner heat shrinkable sleeve is arranged outside the insulating filling layer; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; the two ends of the outer heat-shrinkable tube are respectively provided with a compensation clamp, and a sealing ring is arranged between the compensation clamp and the outer heat-shrinkable tube.

Optionally, the outer heat shrinkable tube and the compensation clamp are externally provided with a reinforcing layer.

Optionally, the reinforcing layer is a woven glass ribbon or a polytetrafluoroethylene ribbon.

Optionally, the cold-pressed sleeve is a copper tube.

Optionally, the insulating filling layer is a polyimide film, or a pressure sensitive adhesive tape, or a polytetrafluoroethylene tape.

Optionally, the inner heat-shrinkable tube and the outer heat-shrinkable tube are teflon heat-shrinkable tubes.

Optionally, the sealing washer is the fluorine rubber circle, the compensation clamp is the constant pressure clamp of area compensation ability.

Optionally, a protective cover is arranged outside the outer heat-shrinkable tube and the compensation clamp.

Optionally, two ends of the shield are respectively provided with a fixing clip, and the fixing clips are used for fixing the shield on the metal armor.

Compared with the prior art, the invention has the following technical effects:

according to the high-temperature motor submersible cable connecting device, the two ends of the outer layer heat-shrinkable tube are respectively provided with the compensation clamp, and the sealing ring is arranged between the compensation clamp and the outer layer heat-shrinkable tube, so that well liquid or gas can be effectively prevented from entering, and the defect that the traditional cable sealing device is unreliable in operation at high temperature, and the short circuit breakdown of a cable is caused because the well liquid or the gas enters the cable sealing device is overcome.

The high-temperature motor submersible cable connecting device is simple in structure, can coat exposed insulation, and can enhance mechanical strength and resist electric stress, thermal stress and damage caused by chemical substances.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a three-dimensional view of the junction of the high temperature submersible cable of the present invention;

FIG. 2 is a schematic view of a high temperature motor submersible cable connection arrangement of the present invention;

FIG. 3 is a schematic view of the connection of the lead in cable of the present invention to the cable core of the power cable;

fig. 4 is a schematic cross-sectional view of the high temperature motor submersible cable connection of the present invention;

description of reference numerals:

1. the high-temperature submersible motor comprises a high-temperature submersible motor, 2. a lead cable, 3. a power cable, 4. a cable core, 5, a cold-pressed sleeve, 6, an insulating filling layer, 7. an inner-layer heat-shrinkable sleeve, 8. an outer-layer heat-shrinkable sleeve, 9. a reinforcing layer, 10. a shield, 11. a sealing ring, 12. a compensation clamp, 13. a fixing clamp, 14. a metal armor, 341. an electric conductor, 342. an insulating layer, 343. a sheath layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.