Evaluation device and method for measuring working capacity of slips of under-pressure operation machine based on wear height of slips

Abstract

The invention provides an evaluation device and method for measuring the working capacity of slips of an under-pressure operation machine based on the abrasion height of the slips, and the device comprises a press device, an under-pressure operation machine slip testing device and a control and data transmission device.The method comprises the steps that firstly, the abrasion height of different slips is measured through a die cutting measurement method; then the device is used for carrying out a simulation experiment on the measured slip, and a formula of a mapping relation between the slip abrasion height and the slip working capacity is fitted through a least square method according to a simulation experiment result, so that the method for evaluating the working capacity of the slip of the under-pressure working machine is formed. According to the scheme, the aim of quantitatively evaluating the working capacity of the slips of the under-pressure operation machine at any stage in the field use process is achieved based on slip abrasion height measurement, the use safety of the slips is greatly improved, and the practical value and the popularization value are very high.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas well pressure drilling and production, and in particular, relates to an evaluation device and method for measuring the working capacity of slips of a pressure operation machine based on slip wear height. Background Art

[0002] Pressure operation technology plays a vital role in the oil and gas industry, especially when operating the oil and gas pipe string with pressure operation equipment while maintaining the pressure state in the wellbore. The application of this technology significantly reduces the potential pollution to the oil layer, while protecting the formation and the operating environment to the maximum extent, laying a solid foundation for the sustainable development of oil and gas resources. In this process, slips are one of the key equipment, and their working frequency is extremely high. The main function of slips is to clamp, lift and lower the pipe string, which requires it to prevent slipping and damage to the oil pipe while keeping the pipe string firm. In order to meet these stringent requirements, the slips are equipped with tooth plates inside, which have many tooth plate teeth that are in direct contact with the oil and gas pipe string. However, these teeth will inevitably wear out during long-term use, which will affect the pressure operation ability of slips.

[0003] It is very important to evaluate and improve the operating capacity of the slips of the pressurized operation machine, because the risk of pressurized operation in oil and gas wells is extremely high, and the operating conditions are complex and harsh, which places extremely high demands on the safety and reliability of the equipment. If the performance of the slips is reduced, it may cause safety hazards such as slipping, increase the risk of accidents such as blowouts and natural gas leaks, which will not only threaten the safety of the operators, but also cause huge economic losses.

[0004] Therefore, accurate assessment of the working capacity of slips and taking appropriate measures to improve and maintain them are the key to ensuring safe and efficient operation of oil and gas wells under pressure. By accurately assessing the working capacity of slips, operational risks can be minimized and sustainable development of oil and gas resources can be guaranteed.

[0005] At present, the evaluation of the pressure-carrying operation capability of the cava in China is mainly based on the degree of wear of the cava teeth. For example, when manufacturing the cava, a row of limit teeth with a lower tooth tip height than the other teeth is set at the bottom of the teeth to judge the wear height of the cava teeth and whether it can continue to work. For example, the Chinese utility model patent application with Chinese patent authorization announcement number CN217518614U applies for a patent for a tooth plate structure for predicting tooth wear and a safety cava. The article proposes that "a plurality of rows of tooth plate teeth with a serrated structure are arranged on the tooth plate, and a row of limit teeth for judging the wear height of the tooth plate teeth is arranged at the lower end of the bottom row of the tooth plate teeth, and the tooth tip height of the limit teeth is lower than the inter-tooth height of the tooth plate teeth". This technology cannot evaluate the safety of the cava that has not been processed using this technology, nor can it evaluate the operating capacity of the old cava that has been working, and this technology increases the processing cost of the cava. In order to avoid safety accidents during the operation of slips, it is urgent to explore the evaluation method of the operating capacity of slips under pressure in service, study the detection method of slips, and evaluate the operating capacity of slips. To this end, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an evaluation device and method for measuring the working capacity of slips of a pressure-operating machine based on the slip wear height. The technical solution adopted by the present invention to solve its technical problems is to use the device to conduct experiments to obtain the mapping relationship between the slip wear height and the working capacity, thereby realizing the evaluation of the pressure-operating capacity of new and old slips, thereby saving costs and preventing direct safety accidents.

[0007] Furthermore, the evaluation device for measuring the working capacity of the slips of a belt pressure working machine based on the slip wear height is characterized by comprising a press device, a slip testing device for the belt pressure working machine, and a control and data transmission device.

[0008] Furthermore, the press device has the ability to apply a compressive load downward to an object, and the press device includes a base platform of the press device for supporting the entire experimental device, a frame welded on the base platform of the press device, a top cover welded on the frame, and a movable pressure arm installed between the frames;

[0009] Furthermore, the slip test device for the pressure-operating machine, by supporting and welding on the base platform of the pressure device, has the ability to convert the downward compressive load applied by the pressure device into a downward tensile load, and has the ability to install and replace the slip tooth plate and clamp the oil pipe. The slip test device for the pressure-operating machine includes an oil pipe running through the entire device, a plug connected by a thread at the bottom of the oil pipe, a pressure rod placed on the countersunk hole of the plug, a slip for clamping the oil pipe, a pressure-operating machine slip seat for installing the slip, a support column connected by a thread to the pressure-operating machine slip seat, and a hydraulic oil pump connected by a thread to the pressure-operating machine slip seat through a hydraulic pipe;

[0010] Furthermore, the control and data transmission device communicates in parallel with the press device to achieve signal transmission, and the control and data transmission device has the ability to control the load size of the press device and record it in real time.

[0011] Furthermore, the evaluation method for measuring the working capacity of the slips of a belt pressure machine based on the slip wear height comprises the following steps:

[0012] The first step is to mix the molding materials, cover the molding materials on the slips, and fill the gaps between the slip teeth for molding. At the same time, the slips with different wear heights are molded in the same way. After standing for ten minutes, demoulding is performed. The molds with different wear heights after demoulding are cut into slices with a thickness of 0.2 mm according to the number of rows of slip teeth distribution, and the wear height of the slips is measured, recorded and numbered on a projection measuring instrument.

[0013] The second step is to install the pressure working machine slip test device on the base of the pressure machine device, use a hydraulic oil pump to connect with the pressure working machine slip seat, and control the pressure working machine slip seat to open, select a slip after measurement and install it on the pressure working machine slip seat, put the oil pipe in the pressure working machine slip test device, and use a 0.5-meter-high cushion block to raise the oil pipe, and use the hydraulic oil pump to control the pressure working machine slip seat to close, so that the slip clamps the oil pipe;

[0014] The third step is to use the control and data transmission device to control and record the load of the press device as described above, gradually increase the load of the press device until the oil pipe suddenly slips and drops, stop increasing the load, determine that the slip has failed at this time, and record the press load at this time, which is the maximum axial load capacity of the slip, that is, the maximum working capacity, and then use the hydraulic oil pump to open the slip seat of the pressure working machine and take out the slip;

[0015] Step 4: Replace the measured slips and repeat the second and third steps. After completing the slip tests for all different wear heights, the mapping relationship between the slip wear height and the working capacity in different wear states is fitted by the least squares method. The formula for the slip wear height and working capacity is as follows: F = 400h 5 -4300h 4 +19300h 3 -46500h 2 +61700h-35800, F is the working capacity of the slips, h is the wear height of the slips;

[0016] Step 5: Use the die-cutting measurement method in step 1 to measure the wear height h of the slip to be used. 1 , h 1 Substitute F=400h from step 4 5 -4300h 4 +19300h 3 -46500h 2 +61700h-35800 formula, through F 1 =400h 1 5 -4300h 1 4 +19300h 1 3 -46500h 1 2 +61700h 1 -35800 can be calculated to get F 1 , F 1 That is, the working capacity of the slips to be used. This method is used to evaluate the working capacity of the slips of the pressure working machine.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention characterizes and measures the wear height of the slip by die-cutting measurement method.

[0019] (2) The present invention simulates actual operating conditions by building a simulation experimental device, so as to accurately obtain the working performance data of new and old slips, thereby accurately evaluating the pressure-carrying operating capability of the slips, which helps to improve the safety of using the pressure-carrying slips.

[0020] (3) The present invention measures the working capacity of slips with different wear heights and establishes a mapping relationship between the wear height of the slips and the working capacity, so that the working capacity of the slips can be evaluated by measuring the wear height of the slips during on-site operations.

[0021] (4) The present invention evaluates the working capacity of the belt pressure machine slips by measuring the wear height of the slips, which greatly reduces the need to replace the slips with new ones in advance because the working capacity of the slips worn out after use is unclear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the press device of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the slip testing device of the belt pressure working machine of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the present invention.

[0025] Figure 4 The present invention is a schematic diagram of the implementation process of the method.

[0026] Figure 5 The figure is a schematic diagram of the measuring principle of the die-cutting measurement method of the present invention for measuring the slip wear height.

[0027] Figure 6 It is a schematic diagram of the mapping relationship between different wear heights and working capacities of the slips of the present invention.

[0028] In the above drawings, the component names corresponding to the reference numerals are as follows:

[0029] 1-pressing machine device, 11-top cover, 12-frame, 13-pressure arm, 14-base platform of press machine device, 2-slip test device of pressure working machine, 21-pressure rod, 22-oil pipe, 23-slip, 24-slip seat of pressure working machine, 25-plug, 26-support column, 27-hydraulic pump station, 3-control and data transmission equipment. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and examples. The embodiments of the present invention include but are not limited to the following examples.

[0031] Example

[0032] like Figures 1 to 3 As shown, an evaluation device for measuring the working capacity of slips of a belt pressure machine based on slip wear height, the device comprising:

[0033] Press device 1, slip testing device of pressure working machine 2, control and data transmission device 3.

[0034] The press device 1 comprises: a base platform 14 for supporting the entire experimental device, a pressure arm 13 of the press device 1 hydraulically driven to apply a compressive load downward, a frame 12 mounted on the base platform 14 of the press device, a top cover 11 on the frame, and a movable pressure arm 13 mounted between the frames 12;

[0035] The pressure working machine slip test device 2 is installed on the base platform 14 of the press machine device 1, and the pressure working machine slip test device 2 includes a pressure rod 21 in contact with the movable pressure arm 13, the bottom of the oil pipe 22 is connected to the plug 25 by a thread to achieve a downward tensile load on the oil pipe 22, a slip 23 for clamping the oil pipe 22, a pressure working machine slip seat 24 for fixing the slip 23, a support column 26 for supporting the pressure working machine slip test device 2, and a hydraulic oil pump 27 for providing the pressure working machine slip seat 24 with an initial working pressure;

[0036] The control and data transmission device 3 is connected in parallel with the press device 1 to realize signal transmission. The control and data transmission device 3 has the ability to control the load size of the press device 1 and record it in real time.

[0037] like Figures 4 to 6 As shown, a method for evaluating the working capacity of slips of a belt pressure machine based on the slip wear height is provided, and the specific steps are as follows:

[0038] The first step is to mix the molding materials, cover the molding materials on the slips 23, and fill the gaps between the slip teeth for molding. At the same time, the slips with different wear heights are molded in the same way. After standing for ten minutes, demoulding is performed. The molds with different wear heights after demoulding are cut into slices with a thickness of 0.2 mm according to the number of rows of slip teeth distribution, and the wear height of the slips 23 is measured, recorded and numbered on the projection measuring instrument.

[0039] The second step is to install the pressure working machine slip test device 2 on the pressure machine device base 14, use the hydraulic pump station 27 to connect with the pressure working machine slip seat 24, and control it to open, select a slip 23 after measurement and install it on the pressure working machine slip seat 24, put the oil pipe 22 in the pressure working machine slip test device 2, and use a 0.5-meter-high cushion block to raise the oil pipe 22, and use the hydraulic pump station 27 to control the pressure working machine slip seat 24 to close, so that the slip 23 clamps the oil pipe 22;

[0040] The third step is to use the control and data transmission device 3 to control and record the load of the press device 1, gradually increase the load of the press device 1 until the oil pipe 22 suddenly slips and falls, stop increasing the load, and determine that the slip 23 has failed at this time, and record the press load 1 at this time, which is the maximum axial bearing capacity of the slip 23, that is, the maximum working capacity, and then use the hydraulic pump station 27 to open the slip seat 24 of the belt pressure operation machine and take out the slip 23;

[0041] Step 4: Replace the measured slip 23 and repeat the second and third steps. After completing the experiments on all slips 23 with different wear heights, the mapping relationship between the wear height and working capacity of slips 23 in different wear states is fitted by the least square method. The formula between the wear height and working capacity of slips 23 is as follows: F = 400h 5 -4300h 4 +19300h 3 -46500h 2 +61700h-35800, F is the working capacity of Slip 23, h is the wear height of Slip 23;

[0042] Step 5: Use the die-cutting measurement method in step 1 to measure the wear height h of the slip to be used. 1 , h 1 Substitute F=400h from step 4 5 -4300h 4 +19300h 3 -46500h 2 +61700h-35800 formula, through F 1 =400h 1 5 -4300h 1 4 +19300h 1 3 -46500h 1 2 +61700h 1 -35800 can be calculated to get F 1 , F 1 That is, the working capacity of the slips to be used. This method is used to evaluate the working capacity of the slips of the pressure working machine.

[0043] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any changes made by adopting the design principles of the present invention and performing non-creative work on this basis should fall within the protection scope of the present invention.

Claims

1. An evaluation device for measuring the working capacity of slips of a belt pressure machine based on slip wear height, characterized in that: The device comprises a press device (1), a pressure working machine slip test device (2), and a control and data transmission device (3); the pressure working machine slip test device (2) is connected to the press device (1) using threads, and the control and data transmission device (3) is connected to the press device (1) using optical fibers.

2. The device for evaluating the working capacity of slips of a belt pressure machine based on the slip wear height as claimed in claim 1, characterized in that: The press device (1) includes a press device base (14) supporting the entire press device (1), a frame (12) welded on the press device base (14), a top cover (11) welded on the frame (12), a movable pressure arm (13) installed between the frames (12), and the control and data transmission device (3), wherein the control and data transmission device (3) uses parallel communication to realize signal transmission with the press device (1).

3. The evaluation device for measuring the working capacity of slips of a belt pressure machine based on slip wear height as claimed in claim 1, characterized in that: The pressure-operating machine slip test device (2) comprises an oil pipe (22) running through the entire pressure-operating machine slip test device (2), a plug (25) threadedly connected at the bottom of the oil pipe (22), a pressure rod (21) placed on a countersunk hole of the plug (25), a slip (23) for clamping the oil pipe, a pressure-operating machine slip seat (24) for installing the slip (23), a support column (26) threadedly connected to the pressure-operating machine slip seat (24), and a hydraulic pump station (27) threadedly connected to the pressure-operating machine slip seat (24) via a hydraulic pipe.

4. An evaluation method for an evaluation device for measuring the working capacity of slips of a belt pressure machine based on slip wear height as claimed in claim 3, characterized in that: The specific steps of the evaluation method are as follows: The first step is to mix the molding materials, cover the molding materials on the slips (23), and fill the gaps between the slip teeth for molding. At the same time, the same method is used to mold slips with different wear heights. After standing for ten minutes, demoulding is performed. After demoulding, the molds with different wear heights are cut into thin slices with a thickness of 0.2 mm according to the number of rows of slip teeth distribution. The thin slices are placed on a projection measuring instrument to measure the wear height of the slips, record them, and number them. The second step is to install the pressure working machine slip test device (2) on the pressure machine device base (14), use the hydraulic pump station (27) to connect with the pressure working machine slip seat (24), and control the pressure working machine slip seat (24) to open, select a slip after measurement and install it on the pressure working machine slip seat (24), put the oil pipe (22) in the pressure working machine slip test device (2), and use a cushion block with a height of 0.5 meters to raise the oil pipe (22), and use the hydraulic pump station (27) to control the pressure working machine slip seat (24) to close, so that the slip (23) clamps the oil pipe (22); The third step is to use the control and data transmission device (3) to control and record the load of the press device (1), gradually increase the load of the press device (1) until the oil pipe (22) suddenly slips and falls, stop increasing the load, and determine that the slip (23) has failed at this time, and record the load of the press device (1) at this time. The load is the maximum axial load capacity of the slip (23), that is, the maximum working capacity, and then use the hydraulic pump station (27) to open the slip seat (24) of the belt pressure operation machine and remove the slip (23); In the fourth step, the measured slip (23) is then replaced, and the second and third steps are repeated. After completing the experiments on all slips (23) with different wear heights, the mapping relationship between the slip wear height and the working capacity in different wear states is fitted by the least square method, and the formula of the slip wear height and the working capacity is obtained as follows: F = 400h 5 -4300h 4 +19300h 3 -46500h 2 +61700h-35800, F is the working capacity of the slip (23), h is the wear height of the slip (23); The fifth step is to use the die-cutting measurement method in the first step to measure the wear height h1 of the cava to be used, substitute h1 into the formula described in the fourth step, and calculate F1. F1 is the working capacity of the cava to be used, thus completing the evaluation of the working capacity of the cava of the belt pressure operation machine.

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