CN-121994694-A - Stator shell and rubber bonding effect detection process method, system and equipment

Abstract

The invention discloses a process method, a system and equipment for detecting the bonding effect of a stator shell and rubber, which belong to the technical field of downhole tools for petroleum drilling and production, and comprise the following steps of preparing a metal and rubber material assembly; the method comprises the steps of assembling a metal and rubber material assembly and a detection sample fixing device in a combined mode, installing the assembly and the detection sample fixing device on a tensile testing machine, setting test parameters, detecting the bonding effect of a stator shell and rubber, and judging whether the bonding effect of the stator shell and the rubber is qualified or not according to a detection result. The invention can effectively identify the effectiveness of the bonding process of the motor stator, avoid unqualified parts from flowing into tools, avoid motor faults in drilling and oil extraction operation, solve the technical problem that the bonding of the stator shell and the rubber has no effective detection means, and determine the unified detection standard of the bonding effect of the stator shell and the rubber.

Inventors

• GUO TIANMING
• ZHANG HONGLIN
• SONG JIAN
• SUN XIAOLIANG
• GAO YE
• ZHANG LIGANG
• LI XINGJIE
• WANG RUIXIAO
• SUN YIDI
• LI XIANYI
• ZHANG GUOTIAN
• ZHAO YUJUN
• Huang Xidai
• GONG ZIQING
• LUO XICHAO
• GUO CHEN
• LIU FENG

Assignees

• 中国石油天然气集团有限公司
• 北京石油机械有限公司
• 中国石油集团昆仑制造有限公司

Dates

Publication Date

20260508

Application Date

20241106

Claims (10)

1. 1. The technical method for detecting the bonding effect of the stator shell and the rubber is characterized by comprising the following steps: preparing a metal and rubber material assembly (1); Assembling the metal and rubber material assembly (1) and the detection sample fixing device (2) in a combined way, and installing the assembly on a tensile testing machine; setting test parameters, and detecting the bonding effect of the stator shell and the rubber; and judging whether the bonding effect of the stator shell and the rubber is qualified or not according to the detection result.
2. 2. The method for detecting the bonding effect between the stator housing and the rubber according to claim 1, wherein the preparation of the metal-rubber material assembly (1) comprises the following steps: sawing, namely sawing different parts of the motor stator to obtain motor stator sawing parts with the length of 250-300 mm; turning nonmetallic materials, namely leveling the end surface of a sawing part of a motor stator; turning the metal material, namely turning the metal material with the length of 80-100mm at one end of the motor stator sawing part to expose the nonmetallic material, and cutting the nonmetallic material at a preset length reserved by the nonmetallic material to obtain a long barrel; horizontal milling, namely milling a test piece with the set arc length along the axial direction; Cutting, namely cutting nonmetallic materials along the milling arc length to be broken to obtain the metal and rubber material assembly (1).
3. 3. The process for detecting the bonding effect between the stator housing and the rubber according to claim 1 or 2, wherein the length of the rubber material in the metal-rubber material assembly (1) is 120-160mm, and the thickness is 5.5-6.5mm; the length of the metal shell in the metal and rubber material assembly (1) is 60-100mm, and the thickness is 4-30 mm.
4. 4. The process for detecting the bonding effect between the stator housing and the rubber according to claim 2, wherein the arc length of the metal shell of the metal-rubber material assembly (1) is 23-26mm.
5. 5. The process for detecting the bonding effect between the stator shell and the rubber according to claim 1, wherein the metal shell and the rubber material of the metal-rubber material assembly (1) have an included angle a during detection.
6. 6. The process for detecting the bonding effect of the stator shell and the rubber according to claim 1, wherein the tensile force of the tensile testing machine ranges from 1900N to 5100N, and the speed ranges from 0.5 mm/s to 10mm/s.
7. 7. The process for detecting the bonding effect between a stator housing and rubber according to claim 6, wherein the test parameters are as follows: when the outer diameter of the motor stator is less than or equal to 43mm and less than 80mm, the tension range of the tension tester is 1900-2100N, and the speed range is 0.5-1.5mm/s; When the motor stator outer diameter is less than or equal to 80mm and less than 120mm, the tensile force range of the tensile force tester is 2100-2300N, and the speed range is 1.5-2.5mm/s; when the motor stator outer diameter is less than or equal to 120mm and less than 172mm, the tension range of the tension tester is 2900-3100N, and the speed range is 2.5-3.5mm/s; when the outer diameter of the motor stator is less than or equal to 172mm and less than 216mm, the tension range of the tension tester is 3900-4100N, and the speed range is 2.5-3.5mm/s; When the motor stator outer diameter is less than or equal to 216mm and less than or equal to 286mm, the tensile force range of the tensile force tester is 4900-5100N, and the speed range is 3.5-4.0mm/s.
8. 8. The utility model provides a stator casing and rubber bonding effect detection process system which characterized in that includes: a preparation unit for preparing a metal and rubber material assembly (1); The assembly unit is used for assembling the metal and rubber material assembly (1) and the detection sample fixing device (2) in a combined way and is arranged on the tensile testing machine; The bonding effect detection unit is used for setting test parameters and detecting the bonding effect of the stator shell and the rubber; and the judging unit is used for judging whether the bonding effect of the stator shell and the rubber is qualified or not according to the detection result.
9. 9. The process system for detecting the bonding effect between the stator housing and the rubber according to claim 8, wherein the preparation unit is specifically configured to: sawing, namely sawing different parts of the motor stator to obtain motor stator sawing parts with the length of 250-300 mm; turning nonmetallic materials, namely leveling the end surface of a sawing part of a motor stator; turning the metal material, namely turning the metal material with the length of 80-100mm at one end of the motor stator sawing part to expose the nonmetallic material, and cutting the nonmetallic material at a preset length reserved by the nonmetallic material to obtain a long barrel; horizontal milling, namely milling a test piece with the set arc length along the axial direction; Cutting, namely cutting nonmetallic materials along the milling arc length to be broken to obtain the metal and rubber material assembly (1).
10. 10. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of detecting the adhesion effect between the stator housing and the rubber as defined in any one of claims 1 to 7.

Description

Stator shell and rubber bonding effect detection process method, system and equipment Technical Field The invention belongs to the technical field of petroleum drilling and production downhole tools, and particularly relates to a process method, a system and equipment for detecting the bonding effect of a stator shell and rubber. Background Deep water deep oil gas drilling and geothermal drilling have the problems of high formation temperature, strong rock grinding property, high plasticity and the like, and the traditional rotary table rotary drilling mode is adopted, so that the torque loss is large, the abrasion of a drill rod and a sleeve is serious, and the drilling speed is extremely low during drilling and development. The traditional screw drilling tool is used as a downhole power drilling tool, and a motor assembly as a core component of the traditional screw drilling tool is a key for converting hydraulic energy into kinetic energy. The motor assembly is composed of a stator and a rotor, and is used as a positive displacement motor, and a sealing cavity is formed by the rubber cavity in the stator of the traditional screw drilling tool and the rotor, so that the rotor performs planetary motion in the stator. Because of the existence of the motor stator rubber component, the service life of the motor stator rubber component is difficult to ensure when facing to the conditions of high temperature, high pressure and the like of the ground, especially when working under the working conditions of an ultra-deep well, a geothermal well, an ultra-high temperature well and the like, the phenomena of block falling, tearing, degumming and the like of the rubber component can finally occur, the downhole working time is relatively short, and frequent tool lifting and replacement are caused. The motor stator is made up of stator shell and rubber, and is made up by co-vulcanizing rubber and metal by special bonding technique. The bonding effect of the metal shell and the rubber material becomes an important factor for guaranteeing the safety of the tool. The co-vulcanization of rubber and metal materials is a special process, can only be monitored by process control, and effective finished product detection is a destructive test. Failure to detect by standard tests results in the safety of the tool not being effectively controlled. The stator comprises a screw drilling tool stator and a screw pump stator, and is prepared from a stator shell and rubber materials in the inner cavity of the shell through co-vulcanization. The stator (whether a motor stator or a screw pump stator) is a core component of a downhole tool and is an irreplaceable mainstream tool for downhole operations, and the stability of performance, particularly adhesion between metal and nonmetal, directly affects the service efficiency and service life of the tool. Meanwhile, along with the improvement of oil production and speed of drilling, the rigidity of nonmetallic materials used in the tool is higher and higher. The tool has high frequency impact on the adhesive layer during operation, which presents a serious challenge to the adhesive layer. The bonding between the metal and non-metal materials of the stator housing is an interfacial progression process that typically involves metal surface treatment, adhesive coating, non-metal material filling, and co-vulcanization. The bonding effect between rubber and metal materials is usually verified by a stripping method, and the bonding effect is mainly two test methods of GB/T7760 and GB/T15254, but the test method is only applied to a standard test, and the bonding effect of a stator is not verified. The Chinese patent (patent number: ZL 201810895975.3) discloses a detection device and a detection method for the rubber bonding effect of a stator motor, and the proposed detection device and detection process method verify the bonding effectiveness of components to a certain extent, but the detection process method is only on the end face of a tool, does not have integrity, and the detection process method does not form a unified standard. The bonding effect between the metal and non-metal materials of the stator housing lacks industry accepted test methods. Therefore, development of a new method for detecting the adhesion effect between the stator housing and the rubber is needed. Disclosure of Invention Aiming at the problems, the invention discloses a process method for detecting the bonding effect of a stator shell and rubber, which comprises the following steps: Preparing a metal and rubber material assembly; assembling the metal and rubber material assembly and the detection sample fixing device in a combined way, and installing the assembly on a tensile testing machine; setting test parameters, and detecting the bonding effect of the stator shell and the rubber; and judging whether the bonding effect of the stator shell and the rubber is qualified or not according to the detection result. St