CN216772848U - Load-bearing heating throwing and fishing cable - Google Patents

Abstract

The utility model discloses a load-bearing heating casting and fishing cable which comprises a conductor, an insulating layer, an inner sheath layer, a metal shielding layer, a heat-conducting plastic layer, a resistance wire, a temperature measuring wire, a load-bearing steel wire layer and an outer sheath layer. The utility model has reasonable design, compact structure and safe and convenient operation, is suitable for underground suspension and power supply of an oil-submersible electric pump oil production system, can directly go into the well in an oil pipe, and saves the trouble that the traditional cable goes into the well outside the oil pipe and is fixed by a cable clamp; and can realize providing the heating for the heavy oil well condition, wax deposit well condition, very big improvement oil recovery efficiency.

Description

Load-bearing heating throwing and fishing cable

Technical Field

The utility model relates to the technical field of submersible cables, in particular to a load-bearing heating throwing and fishing cable.

Background

In the petroleum industry, with the increasing severity of the problem of eccentric wear of pipes and rods in a sucker rod oil production system, an electric submersible pump is applied to a great extent, but cables of the traditional electric submersible pump are often damaged and failed in the process of entering a well or lifting a casing; meanwhile, when the air temperature is reduced due to seasonal changes, the oil extraction efficiency of a heavy oil well and a wax precipitation well is greatly reduced due to poor flowability of crude oil, and then the flowability of the crude oil is improved by adding a heating cable or injecting steam, hot water, medicaments and the like, so that the operation cost is greatly increased, the risk is increased, and the efficiency is reduced; however, the cable of the conventional submersible pump cannot meet the requirements, so that the service life of the cable is shortened, and the operation cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a load-bearing heating throwing and fishing cable aiming at the defects in the prior art, which is suitable for underground suspension and power supply of an oil-submersible electric pump oil production system, can be directly put into a well in an oil pipe, and saves the trouble that the traditional cable is put into the well outside the oil pipe and is fixed by a cable clamp; and can realize providing heating for the heavy oil well condition, wax deposit well condition, very big improvement oil recovery efficiency.

The utility model provides a load-bearing heating throwing and fishing cable, which adopts the technical scheme that: comprises a conductor (1), an insulating layer (2), an inner sheath layer (3), a metal shielding layer (4) and an outer sheath layer (9), wherein the insulating layer (2) is respectively extruded outside a multi-strand conductor (1), the inner sheath layer (3) is extruded outside the insulating layer (2), the metal shielding layer (4) is wrapped outside the inner sheath layer (3), it is characterized by also comprising a temperature measuring wire (5), a resistance wire (6), a heat-conducting plastic layer (7) and a load-bearing steel wire layer (8), wherein the heat-conducting plastic layer (7) is extruded outside the metal shielding layer (4), a plurality of resistance wires (6) and temperature measuring wires (5) are wound outside the heat-conducting plastic layer (7), a heat-conducting plastic layer (7) is extruded outside the resistance wire (6) and the temperature measuring wire (5), the heat-conducting plastic layer (7) is externally provided with an armored load-bearing steel wire layer (8), and the load-bearing steel wire layer (8) is externally extruded with an outer sheath layer (9).

Preferably, the conductor (1) is a round conductor formed by drawing an oxygen-free copper rod, and is tightly coated by the insulating layer (2).

Preferably, the insulating layer (2) is an insulating material formed by combining a polyimide FEP composite film and fluoroplastic, and is coated on the surface of the conductor (1) to form the power cable core.

Preferably, the metal shielding layer (4) is made of a copper strip and tightly wrapped outside the inner sheath layer (3).

Preferably, the load bearing steel wire layer (8) is reversely twisted and sheathed on the heat conducting plastic layer (7) by the inner high-carbon galvanized steel wire and the outer high-carbon galvanized steel wire.

Preferably, the outer sheath layer (9) is extruded outside the load-bearing steel wire layer (8) by a cross-linked polyethylene sheath material.

Preferably, two temperature measuring lines (5) are used.

The utility model has the beneficial effects that: the inner sheath layer plays a role in sealing, underground gas and liquid are prevented from entering the cable core, heat generated by external heating can be isolated, and the cable core can be effectively protected; the upper end of the resistance wire is connected with the heating temperature control device, a loop is formed by the metal shielding layer, and the temperature measuring wire is connected with the temperature control device, so that the functions of temperature measurement and temperature control are realized; the lower part of the load bearing steel wire layer is connected with an electric motor pump in a suspension way, can bear 20 tons of pulling force and can completely bear the weight of the underground oil extraction device, and the weight does not exceed 1 ton; the outer sheath layer can effectively isolate the erosion of severe well conditions such as underground acid, alkali, silt and the like to the load-bearing steel wire layer, and is convenient for the sealing operation of a well mouth, so that the service life of the cable is prolonged, and the use requirement of the electric submersible pump is met.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the upper diagram: the temperature measuring device comprises a conductor 1, an insulating layer 2, an inner sheath layer 3, a metal shielding layer 4, a temperature measuring wire 5, a resistance wire 6, a heat conducting plastic layer 7, a load bearing steel wire layer 8 and an outer sheath layer 9.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Embodiment 1, referring to fig. 1, the load-bearing heating fishing cable provided by the utility model comprises a conductor 1, an insulating layer 2, an inner sheath layer 3, a metal shielding layer 4 and an outer sheath layer 9, wherein the insulating layer 2 is respectively extruded outside a plurality of conductors 1, the inner sheath layer 3 is extruded outside the insulating layer 2, the metal shielding layer 4 is wrapped outside the inner sheath layer 3 in a winding manner, and the load-bearing heating fishing cable is characterized by further comprising a temperature measuring wire 5, a resistance wire 6, a heat-conducting plastic layer 7 and a load-bearing steel wire layer 8, the heat-conducting plastic layer 7 is extruded outside the metal shielding layer 4, the resistance wire 6 and the temperature measuring wire 5 are wound outside the heat-conducting plastic layer 7, the heat-conducting plastic layer 7 is further extruded outside the resistance wire 6 and the temperature measuring wire 5, the load-bearing steel wire layer 8 is externally sheathed on the heat-conducting plastic layer 7, and the outer sheath layer 9 is extruded outside the load-bearing steel wire layer 8.

Wherein, the conductor 1 is a round conductor which is formed by drawing a No. 1 oxygen-free copper rod and can meet the load power requirement, and is tightly coated by the insulating layer 2; the insulating layer 2 is a polyimide FEP composite film and fluoroplastic combined insulating material, and uniformly and tightly coats the surface of the conductor 1 to form a power cable core of the load-bearing throwing and fishing cable; the inner sheath layer 3 is made of a cross-linked polyethylene sheath material, and the insulating cable core is tightly filled and coated; the metal shielding layer 4 is made of copper strips and is tightly wrapped outside the inner sheath layer 3. The heat-conducting plastic layer 7 is made of a heat-conducting plastic material and is extruded outside the metal shielding layer 4; the resistance wire 6 and the temperature measuring wire 5 are wound and twisted outside the heat conducting plastic layer 7, and then the heat conducting plastic layer 7 is extruded, so that the inner layer and the outer layer of heat conducting plastic are bonded into the integral heat conducting plastic layer 7; the load-bearing steel wire layer 8 is armored on the heat-conducting plastic layer 7 by the inner high-carbon galvanized steel wire and the outer high-carbon galvanized steel wire in a reverse direction according to a regular twisting mode; the outer sheath layer 9 is evenly and tightly extruded outside the load-bearing steel wire layer 8 by the cross-linked polyethylene sheath material.

When the cable is used, the conductor and the insulating layer form a cable core, the upper end of the cable core is connected with the power distribution cabinet, and the lower end of the cable core is connected with the motor electric pump to provide a power supply for the motor; the inner sheath layer plays a role in sealing, underground gas and liquid are prevented from entering the cable core, heat generated by external heating can be isolated, and the cable core can be effectively protected; the upper end of the resistance wire is connected with a heating temperature control device, a loop is formed by a metal shielding layer, and a temperature measuring wire is connected with the temperature control device, so that the functions of temperature measurement and temperature control are realized; the lower part of the load bearing steel wire layer is connected with an electric motor pump in a suspension way, can bear 20 tons of pulling force and can completely bear the weight of the underground oil extraction device, and the weight does not exceed 1 ton; the outer sheath layer can effectively isolate the corrosion of severe well conditions such as underground acid, alkali, silt and the like to the load bearing steel wire layer, and is convenient for the sealing operation of a well mouth, thereby prolonging the service life of the cable.

Embodiment 2, utility model provides a hold lotus heating and drag for cable, including conductor 1, insulating layer 2, inner sheath layer 3, metallic shield layer 4, oversheath layer 9, the insulating layer 2 is crowded package insulating layer 2 respectively outward to stranded conductor 1, the outer crowded package inner sheath layer 3 of insulating layer 2, inner sheath layer 3 is outer around wrapping metallic shield layer 4, characterized by still includes temperature measurement line 5, resistance wire 6, heat conduction plastic layer 7 and holds lotus steel wire layer 8, metallic shield layer 4 outer crowded package heat conduction plastic layer 7, twine many resistance wires 6 and temperature measurement line 5 outside heat conduction plastic layer 7 resistance wire 6 and temperature measurement line 5 extrude a layer heat conduction plastic layer 7 again outside, hold lotus steel wire layer 8 outside 7 outer crowded package oversheath layer 9 of armoring of plastic layer 8.

The difference from the embodiment 1 is that: the load bearing steel wire layer 8 can be armored on the heat conducting plastic layer 7 by a plurality of layers of high-carbon galvanized steel wires and a plurality of layers of high-carbon galvanized steel wires, and can bear more weight of the underground oil extraction device.

Compared with the prior art, the underground suspension and power supply device is particularly suitable for underground suspension and power supply of an oil-submersible electric pump oil production system, can be directly put into the well in the oil pipe, and saves the trouble that the traditional cable is put into the well outside the oil pipe and is fixed by a cable clamp; and can realize providing heating for the heavy oil well condition, wax deposit well condition, very big improvement oil recovery efficiency. Moreover, the device has the advantages of reasonable design, convenient operation, environmental protection, energy conservation, cost saving and great improvement on the working efficiency.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent changes made according to the technical solution of the present invention shall fall within the scope of the present invention as claimed.

Claims (7)

1. A load-bearing heating throwing and fishing cable is characterized in that: comprises a conductor (1), an insulating layer (2), an inner sheath layer (3), a metal shielding layer (4) and an outer sheath layer (9), wherein the insulating layer (2) is respectively extruded outside a multi-strand conductor (1), the inner sheath layer (3) is extruded outside the insulating layer (2), the metal shielding layer (4) is wrapped outside the inner sheath layer (3), it is characterized by also comprising a temperature measuring wire (5), a resistance wire (6), a heat-conducting plastic layer (7) and a load-bearing steel wire layer (8), wherein the heat-conducting plastic layer (7) is extruded outside the metal shielding layer (4), a plurality of resistance wires (6) and temperature measuring wires (5) are wound outside the heat-conducting plastic layer (7), a heat-conducting plastic layer (7) is extruded outside the resistance wire (6) and the temperature measuring wire (5), the heat-conducting plastic layer (7) is externally provided with an armored load-bearing steel wire layer (8), and the load-bearing steel wire layer (8) is externally extruded with an outer sheath layer (9).

2. The load-bearing heating casting and fishing cable of claim 1, wherein: the conductor (1) is a round conductor formed by drawing an oxygen-free copper rod and is tightly coated by the insulating layer (2).

3. The load-bearing heating casting and fishing cable of claim 2, wherein: the insulating layer (2) is coated on the surface of the conductor (1) to form the power cable core.

4. The load-bearing heating casting and fishing cable of claim 3, wherein: the metal shielding layer (4) is made of a copper strip material and is tightly wrapped outside the inner sheath layer (3).

5. The load-bearing heating casting and fishing cable of claim 4, wherein: the load-bearing steel wire layer (8) is formed by reversely twisting and armoring inner-layer high-carbon galvanized steel wires and outer-layer high-carbon galvanized steel wires on the heat-conducting plastic layer (7).

6. The load-bearing heating casting and fishing cable of claim 5, wherein: the outer sheath layer (9) is extruded outside the load-bearing steel wire layer (8) by a cross-linked polyethylene sheath material.

7. The loaded heating fishing cable of claim 6, wherein: the two temperature measuring lines (5) are adopted.

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