CN-116015016-B - High-temperature thick oil submersible linear motor and high-temperature thick oil well exploitation equipment

Abstract

The invention discloses a high-temperature thick oil submersible linear motor which comprises a stator, a rotor and a sliding guide sleeve which are coaxially arranged, wherein the sliding guide sleeve is fixedly arranged in a cavity in the center of the stator, the rotor penetrates through a center hole of the sliding guide sleeve and can axially move relative to the stator and the sliding guide sleeve, the sliding guide sleeve comprises a guide sleeve seat of a sleeve structure, the outer side surface of the guide sleeve seat is in contact with the inner side surface of the stator and is relatively fixed, a hard alloy layer is metallurgically bonded on the inner side surface of the guide sleeve seat, the hard alloy layer is in contact with the outer side surface of the rotor and relatively slides, a plurality of cutting gaps which are arranged around the center are formed in the guide sleeve seat, and the cutting gaps circumferentially divide the inner side surface of the guide sleeve seat and the hard alloy layer. The radial limiting capacity of the rotor is guaranteed, large thermal stress generated on the joint surface of the hard alloy layer and the guide sleeve seat at high temperature can be avoided, the hard alloy layer is prevented from being stripped, and the reliability and stability of the device are improved. The invention also discloses high-temperature thick oil well exploitation equipment comprising the high-temperature thick oil submersible linear motor.

Inventors

• ZHOU SHI
• CHEN WEI
• TANG JIAN
• HU HONGYI
• FAN CUNLI
• JIN HAISHAN
• LIU HUAN
• YAN CAISONG
• WU SHUNHAI
• CHEN PU
• TANG SHENGQING
• WANG HONGJI
• WANG HU
• ZENG CHUN
• HUANG SONGHAI

Assignees

• 湖南中车尚驱电气有限公司

Dates

Publication Date

20260508

Application Date

20221230

Claims (5)

1. 1. The utility model provides a high temperature viscous oil submersible linear motor, includes stator (1), active cell (2) and slip guide pin bushing (3) of coaxial arrangement, slip guide pin bushing (3) are fixed to be set up in the cavity at stator (1) center, active cell (2) pass the centre bore of slip guide pin bushing (3) to can be relative stator (1) and slip guide pin bushing (3) axial displacement, characterized in that, slip guide pin bushing (3) include sleeve structure's guide pin bushing seat (31), the lateral surface of guide pin bushing seat (31) with stator (1) medial surface contact and relatively fixed, the medial surface metallurgical bonding of guide pin bushing seat (31) has carbide layer (32), carbide layer (32) medial surface and the lateral surface of active cell (2) contact and relatively slide, be provided with on guide pin bushing seat (31) around the central a plurality of cutting gap (33) that arrange, cut gap (33) cut apart along circumference carbide layer (31) medial surface and carbide layer (32), under high temperature carbide layer (31) the lateral surface of avoiding the carbide layer (32) to take place the thermal stress of the carbide layer (32) with the guide pin bushing seat (31); The guide sleeve seat (31) is of a cylindrical sleeve structure, the depth direction of the cutting gap (33) is the radial direction of the guide sleeve seat (31), and the length direction of the cutting gap (33) is the axial direction of the guide sleeve seat (31); The plurality of cutting slits (33) are uniformly distributed along the inner peripheral side surface of the guide sleeve seat (31); The two end openings of the cutting gap (33) are positioned at the two end surfaces of the guide sleeve seat (31) and the hard alloy layer (32), the inner side opening of the cutting gap (33) is positioned at the inner side surface of the hard alloy layer (32), and the bottom of the cutting gap (33) is positioned in the guide sleeve seat (31); the depth of the cutting gap (33) is greater than or equal to half of the thickness from the outer side to the inner side of the sliding guide sleeve (3); The spacing between adjacent cutting slits (33) is less than or equal to three times the thickness of the cemented carbide layer (32).
2. 2. The high temperature thick oil submersible linear motor according to claim 1, characterized in that the cutting slit (33) is shaped by wire cutting.
3. 3. The high-temperature thick oil submersible linear motor according to claim 1, characterized by comprising a plurality of sliding guide sleeves (3) which are sequentially arranged in the hollow of the center of the stator (1) along the axis.
4. 4. The high-temperature thick oil submersible linear motor according to claim 1, wherein an upper connecting pipe (4) and an outgoing line (5) are connected to the upper end of the stator (1), and a lower connecting pipe (6) is connected to the lower end of the stator (1).
5. 5. A high temperature thick oil well exploitation device, comprising the high temperature thick oil submersible linear motor according to any one of claims 1 to 4.

Description

High-temperature thick oil submersible linear motor and high-temperature thick oil well exploitation equipment Technical Field The invention relates to the field of thickened oil exploitation, in particular to a high-temperature thickened oil submersible linear motor. In addition, the invention also relates to high-temperature thick oil well exploitation equipment comprising the motor. Background Thick oil is one of the important alternative energy sources in the future, has the advantages of high viscosity and large reserves, but has high exploitation difficulty. One current recovery method is to inject high temperature and high pressure steam into the well, hold it for a period of time, called "stuffy well", let the viscosity of the thick oil decrease at high temperature, and then recover the thick oil. The high temperature of the water vapor is very high, up to 370 ℃, which presents a significant challenge for oil recovery equipment. In the prior art, a reciprocating type submersible electric pump is generally adopted for exploitation, the power equipment is that the submersible linear motor is a cylindrical linear motor, the rotor is positioned at the center of the cylinder and reciprocates along the axial direction of the cylinder, and the stator is in a circular ring shape and is sleeved outside the rotor. In order to ensure that the rotor does not abrade the stator during movement, a sliding guide sleeve is arranged in the stator to radially limit the rotor. The sliding guide sleeve comprises a guide sleeve seat and an inner alloy layer, and the guide sleeve seat and the inner alloy layer are in interference fit, so that fixation is realized. The alloy layer adopts brittle material, and self coefficient of thermal expansion is very little, and the guide pin bushing seat generally adopts stainless steel, and coefficient of thermal expansion is great, and in the high temperature well, because ambient temperature differs greatly with ground temperature, if the interference between guide pin bushing seat and the alloy layer is little, then there is great clearance between underground guide pin bushing seat and the alloy layer, and the slip guide pin bushing loses fixedly, weakens the spacing effect to the active cell. If the interference between the guide sleeve seat and the alloy layer is large, the internal stress of the sliding guide sleeve is too large, and the sliding guide sleeve is easy to crack. Therefore, how to provide a high-temperature thick oil submersible linear motor capable of ensuring a limiting effect and preventing breakage is a technical problem that needs to be solved by those skilled in the art at present. Disclosure of Invention The invention aims to provide a high-temperature thick oil submersible linear motor, wherein a guide sleeve seat and a hard alloy layer are integrated in a metallurgical bonding mode, so that the limiting effect on a rotor is ensured, the inner side surface of the guide sleeve seat and the hard alloy layer are divided through cutting gaps, and excessive thermal stress is avoided. The invention also aims to provide high-temperature thick oil well exploitation equipment comprising the high-temperature thick oil submersible linear motor. In order to solve the technical problems, the invention provides a high-temperature thick oil submersible linear motor, which comprises a stator, a rotor and a sliding guide sleeve which are coaxially arranged, wherein the sliding guide sleeve is fixedly arranged in a cavity in the center of the stator, the rotor passes through a center hole of the sliding guide sleeve and can axially move relative to the stator and the sliding guide sleeve, the sliding guide sleeve comprises a guide sleeve seat with a sleeve structure, the outer side surface of the guide sleeve seat is in contact with and relatively fixed with the inner side surface of the stator, the inner side surface of the guide sleeve seat is metallurgically bonded with a hard alloy layer, the hard alloy layer is in contact with and relatively slides against the outer side surface of the rotor, a plurality of cutting gaps which are arranged around the center are formed in the guide sleeve seat, and the cutting gaps circumferentially divide the inner side surface of the guide sleeve seat and the hard alloy layer. Preferably, the guide sleeve seat is of a cylindrical sleeve structure, the depth direction of the cutting gap is the radial direction of the guide sleeve seat, and the length direction of the cutting gap is the axial direction of the guide sleeve seat. Preferably, the plurality of cutting slits are uniformly distributed along the inner peripheral side surface of the guide sleeve seat. Preferably, openings at two ends of the cutting gap are located at two end surfaces of the guide sleeve seat and the hard alloy layer, an opening at the inner side of the cutting gap is located at the inner side of the hard alloy layer, and the bottom of the cutting gap is located