Sucker rod and oil pipe coating friction simulation testing machine

Abstract

The utility model discloses a sucker rod and oil pipe coating friction simulation testing machine, and relates to the technical field of oil extraction in the oil industry. The testing machine comprises a control cabinet, a test piece working groove, a lever mechanism, a counterweight box, an equipment mounting rack, a driving mechanism, a transmission mechanism, a reciprocating linear push rod, a sucker rod friction test head, a heating rod, an oil pipe test piece, a pressure sensor and a counting sensor, the heating rod and the oil pipe test piece are arranged in the test piece working groove, the other end of the reciprocating linear push rod is connected with the sucker rod friction test head through the pressure sensor, the oil pipe test piece is arranged at the bottom in the test piece working groove, and the sucker rod friction test head is located above the oil pipe test piece; and a control device is arranged in the control cabinet. The heating rod is arranged in the test piece working groove, and a friction experiment in a high-temperature environment can be carried out, so that the friction and wear mechanism of a test piece coating can be accurately and efficiently analyzed and evaluated, and the experiment cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil extraction in the oil industry, and particularly relates to an oil pumping rod and oil pipe coating friction simulation testing machine. BACKGROUND

[0002] In the sucker rod pumping system, whether it is a vertical well or an inclined well, the sucker rod coupling and the oil pipe are in relative motion in contact, so there is inevitable wear between the sucker rod coupling and the oil pipe. After wear, the oil pipe and the sucker rod cannot be used, causing oil well operation, short oil well maintenance period, increased operation cost, increased rod and pipe consumption, more oil well downtime, and reduced crude oil production. In order to solve this problem, the oil field uses various wear-resistant sucker rod couplings and oil pipes, but at present, whether they are wear-resistant or not can only be observed after they are used in the well. This blind field test makes it take a long time to get the test results. Due to different well conditions or changes in well conditions or changes in oil well operating parameters, it is difficult to observe the accurate wear resistance of the designed wear-resistant sucker rod coupling and oil pipe after they are put into the well, causing some sucker rod couplings and oil pipes that are not wear-resistant to be put into the well, resulting in poor anti-deviation wear effect and the problem of sucker rod coupling wear on the oil pipe.

[0003] The current friction and wear testing device cannot simulate the high-temperature lubricated fatigue friction and wear environment, the test accuracy is not high, and the sealing wear-resistant coating in the high-temperature lubricated fatigue friction and wear environment cannot be subjected to simulation environment evaluation. The analysis of the coating friction and wear mechanism based thereon is not accurate. In order to meet the test needs, multiple friction and wear testing machines with different motion forms, environmental conditions and loading force ranges are usually purchased, which causes a substantial increase in experimental time cost, waste of resources and one-sidedness of research results. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an oil pumping rod and oil pipe coating friction simulation testing machine, which has a heating rod in the test piece working groove, can perform friction experiments in a high-temperature environment, and can accurately and efficiently analyze and evaluate the friction and wear mechanism of the test piece coating, thereby effectively reducing the experimental cost.

[0005] The present application provides an oil pumping rod and oil pipe coating friction simulation testing machine, which comprises a control cabinet, a test piece working groove, a lever mechanism, a counterweight weight box, an equipment mounting rack, a driving mechanism, a transmission mechanism, a reciprocating straight push rod, an oil pumping rod friction test head, a heating rod, an oil pipe test piece, a pressure sensor and a counting sensor.

[0006] The control cabinet is connected with the equipment mounting rack, the driving mechanism is arranged on one side of the equipment mounting rack, one end of the transmission mechanism is in transmission connection with the output end of the driving mechanism, the other end of the transmission mechanism is arranged on the equipment mounting rack and is connected with the input end of the reciprocating straight push rod, the reciprocating straight push rod is arranged on the equipment mounting rack, the test piece working groove is arranged on one end of the lever mechanism, the counterweight weight box is arranged on the other end of the lever mechanism, the heating rod and the oil pipe test piece are arranged in the interior of the test piece working groove, the other end of the reciprocating straight push rod is connected with the sucker rod friction test head through the pressure sensor, the oil pipe test piece is arranged at the bottom in the test piece working groove, the sucker rod friction test head is located above the oil pipe test piece, and the counting sensor is connected with the reciprocating straight push rod.

[0007] The control cabinet is connected with the equipment mounting rack, the driving mechanism is arranged on one side of the equipment mounting rack, one end of the transmission mechanism is in transmission connection with the output end of the driving mechanism, the other end of the transmission mechanism is arranged on the equipment mounting rack and is connected with the input end of the reciprocating straight push rod, the reciprocating straight push rod is arranged on the equipment mounting rack, the test piece working groove is arranged on one end of the lever mechanism, the counterweight weight box is arranged on the other end of the lever mechanism, the heating rod and the oil pipe test piece are arranged in the interior of the test piece working groove, the other end of the reciprocating straight push rod is connected with the sucker rod friction test head through the pressure sensor, the oil pipe test piece is arranged at the bottom in the test piece working groove, the sucker rod friction test head is located above the oil pipe test piece, and the counting sensor is connected with the reciprocating straight push rod.

[0008] According to some embodiments of the present application, a pressure control display screen, a temperature control display screen and a reciprocating frequency counting display are arranged on the control cabinet, and the control device is connected with the pressure control display screen, the temperature control display screen and the reciprocating frequency counting display respectively.

[0009] According to some embodiments of the present application, a motor speed controller is further arranged on the control cabinet, and the motor speed controller is connected with the driving mechanism and the control device respectively.

[0010] According to some embodiments of the present application, the transmission mechanism comprises a chain transmission mechanism and a crank connecting rod mechanism, one end of the chain transmission mechanism is in transmission connection with the output end of the driving mechanism, the other end of the chain transmission mechanism is in transmission connection with the input end of the crank connecting rod mechanism, and the output end of the crank connecting rod mechanism is connected with one end of the reciprocating straight push rod away from the pressure sensor.

[0011] According to some embodiments of the present application, the driving mechanism is a rotary servo motor.

[0012] According to some embodiments of the present application, the lever mechanism comprises a support base, a support column, a first cross beam and a second cross beam, the support column is arranged on the support base, the first cross beam is sleeved with a first lever rotating bearing, a second lever rotating bearing and a third lever rotating bearing, the first lever rotating bearing and the third lever rotating bearing are arranged at two ends of the first cross beam respectively, the second lever rotating bearing is arranged between the first lever rotating bearing and the second lever rotating bearing, the first cross beam is connected with the support column through the first lever rotating bearing and the third lever rotating bearing, the first cross beam is connected with the second cross beam through the second lever rotating bearing, the counterweight box is arranged at one end of the second cross beam, and the test piece working groove is arranged at the other end of the second cross beam and close to the control cabinet and the equipment mounting rack.

[0013] According to some embodiments of the present application, the lever mechanism further comprises a connecting column, the connecting column is arranged at the other end of the second cross beam, and the test piece working groove is arranged on the connecting column.

[0014] In the present application, the tubing test piece is fixed in the test piece working groove, a certain amount of friction medium is added, and the heating rod is heated to a preset temperature by the control device, the driving mechanism is driven by the control device to drive the transmission mechanism to drive the reciprocating linear push rod to move linearly, the reciprocating linear push rod is used to drive the sucker rod friction test head to reciprocate against the tubing test piece, and the counting sensor is used to count the friction times of the sucker rod friction test head by measuring the movement times of the reciprocating linear push rod and transmit the measured friction times to the control device; the test piece working groove is fixed on the lever mechanism, the pressure size is controlled by adding weights to the counterweight box at the other end of the lever mechanism, and the pressure value can be monitored in real time by the pressure sensor installed on the top of the sucker rod friction test head and sent to the control mechanism. Through the above arrangement, the heating rod is arranged in the test piece working groove, the friction experiment under high temperature environment can be carried out, and the test piece coating friction and wear mechanism can be accurately and efficiently analyzed and evaluated, and the experimental cost is effectively reduced.

[0015] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by practicing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Additional aspects and advantages of the present application will become apparent and easily understood by the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A top view structural schematic diagram of the sucker rod and tubing coating friction simulation test machine provided by the embodiments of the present application is shown in the figure;

[0018] Figure 2 The main structure of the oil rod and oil pipe coating friction simulation test machine provided by the embodiment of the application is shown in the figure.

[0019] Reference signs:

[0020] Control cabinet 100, pressure control display screen 110, temperature control display screen 120, reciprocating frequency count display 130, motor speed controller 140;

[0021] Device mounting rack 200, driving mechanism 210, chain transmission mechanism 220, crank connecting rod mechanism 230, reciprocating straight push rod 240, pressure sensor 250, counting sensor 260;

[0022] Test piece working groove 300, heating rod 310, oil rod friction test head 320, counterweight weight box 330;

[0023] Lever mechanism 400, support base 410, support column 420, first cross beam 430, first lever rotating bearing 431, second lever rotating bearing 432, third lever rotating bearing 433, second cross beam 440, connecting column 450. DETAILED DESCRIPTION

[0024] The embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the application, and cannot be understood as limiting the application.

[0025] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the purpose of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0026] In the description of the application, if the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0027] In the description of the application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the application in combination with the specific content of the technical solution.

[0028] In the sucker rod pumping system, whether it is a vertical well or an inclined well, the sucker rod coupling and the oil pipe are in relative motion in contact, therefore, there is inevitable wear between the sucker rod coupling and the oil pipe, which makes the oil pipe and the sucker rod cannot be used after wear, causes the oil well operation, the oil well free repair period is short, increases the operation cost, increases the rod pipe consumption, the oil well downtime is more, reduces the crude oil production. In order to solve this problem, the oil field uses a variety of wear-resistant sucker rod couplings and oil pipes, but at present, whether it is wear-resistant can only be observed after being used in the well, this blind field test makes it take a long time to get the test result. Due to different well conditions, or well conditions change, or oil well working parameters change, it is difficult to observe the accurate wear-resistant performance of the designed wear-resistant sucker rod coupling and oil pipe after being put into the well, causing some not wear-resistant sucker rod coupling and oil pipe to be put into the well for use, causing poor anti-deviation wear effect, the problem of sucker rod coupling deviation wear oil pipe still exists.

[0029] The current friction and wear test device cannot simulate the high temperature lubrication fatigue friction and wear environment, the test accuracy is not high, and the sealing wear-resistant coating in the high temperature lubrication fatigue friction and wear environment cannot be simulated and tested. The analysis of the coating friction and wear mechanism based on this is not accurate. In order to meet the test needs, usually a plurality of friction and wear testing machines with different motion forms, environmental conditions and loading force ranges are purchased, which causes a large increase in experimental time cost, waste of resources and one-sidedness of research results.

[0030] In order to solve the above problems, the present application provides a kind of oil rod and oil pipe coating friction simulation test machine, the embodiment of the present application is further described below with reference to the drawings.

[0031] Referring to Figures 1 to 2The application provides an oil sucker rod and oil pipe coating friction simulation testing machine, which comprises a control cabinet 100, a test piece working groove 300, a lever mechanism 400, a counterweight weight box 330, an equipment mounting rack 200, a driving mechanism 210, a transmission mechanism, a reciprocating linear push rod 240, an oil sucker rod friction test head 320, a heating rod 310, an oil pipe test piece, a pressure sensor 250 and a counting sensor 260. The control cabinet 100 is connected with the equipment mounting rack 200. The driving mechanism 210 is arranged on one side of the equipment mounting rack 200. One end of the transmission mechanism is in transmission connection with the output end of the driving mechanism 210. The other end of the transmission mechanism is arranged on the equipment mounting rack 200 and is connected with the input end of the reciprocating linear push rod 240. The reciprocating linear push rod 240 is arranged on the equipment mounting rack 200. The test piece working groove 300 is arranged at one end of the lever mechanism 400. The counterweight weight box 330 is arranged at the other end of the lever mechanism 400. The heating rod 310 and the oil pipe test piece are arranged in the interior of the test piece working groove 300. The other end of the reciprocating linear push rod 240 is connected with the oil sucker rod friction test head 320 through the pressure sensor 250. The oil pipe test piece is arranged at the bottom in the test piece working groove 300. The oil sucker rod friction test head 320 is located above the oil pipe test piece. The counting sensor 260 is connected with the reciprocating linear push rod 240. The interior of the control cabinet 100 is provided with a control device, and the control device is connected with the driving mechanism 210, the counting sensor 260, the pressure sensor 250 and the heating rod 310 respectively.

[0032] Specifically, when the mutual friction experiment between the oil sucker rod friction test head 320 and the oil pipe test piece needs to be carried out, a certain weight of weight is added in the counterweight weight box 330. The weight will drive the oil pipe test piece arranged in the test piece working groove 300 to be close to the oil sucker rod friction test head 320 and in parallel contact with the oil sucker rod friction test head 320. After that, the oil pipe test piece remains stationary. The oil sucker rod friction test head 320 will make reciprocating linear motion under the driving of the reciprocating linear push rod 240 to mutually abrade the oil pipe test piece. When the friction and wear test is finished, the weight in the counterweight weight box 330 is removed. The oil pipe test piece will be away from the oil sucker rod friction test head 320, that is, the experiment is finished. The size of the friction loading force between the oil sucker rod friction test head 320 and the oil pipe test piece can be adjusted by changing the weight added to the counterweight weight box 330. Based on this, the application can repeatedly rub between the oil sucker rod friction test head 320 and the oil pipe test piece by the reciprocating linear push rod 240, so as to generate friction between the oil sucker rod friction test head 320 and the oil pipe test piece, and simulate the working condition of the oil sucker rod and the oil pipe in the well.

[0033] In the application, the tubing test piece is fixed in the test piece working groove 300, a certain amount of friction medium is added, and the heating rod 310 is controlled by the control device to heat the friction medium to a preset temperature. The control device controls the driving mechanism 210 to drive the transmission mechanism to drive the reciprocating linear push rod 240 to move linearly and reciprocally. The reciprocating linear push rod 240 is used to drive the sucker rod friction test head 320 to reciprocally rub the tubing test piece. The counting sensor 260 is used to count the number of rubs of the sucker rod friction test head 320 by measuring the number of movements of the reciprocating linear push rod 240 and transmit the measured number of rubs to the control device. The test piece working groove 300 is fixed on the lever mechanism 400. The size of the pressure is controlled by adding weights to the counterweight weight box 330 at the other end of the lever mechanism 400. The size of the pressure value can be monitored in real time by the pressure sensor 250 installed at the top of the sucker rod friction test head 320 and sent to the control mechanism. Through this setting, the test piece working groove 300 is provided with the heating rod 310, and the friction experiment under high temperature environment can be carried out, and the friction and wear mechanism of the test piece coating can be accurately and efficiently analyzed and evaluated, and the experimental cost is effectively reduced.

[0034] Referring to Figure 1 It can be understood that the control cabinet 100 is provided with a pressure control display screen 110, a temperature control display screen 120 and a reciprocating frequency counting display 130, and the control device is connected with the pressure control display screen 110, the temperature control display screen 120 and the reciprocating frequency counting display 130 respectively.

[0035] It should be noted that the pressure control display screen 110 is used to display the pressure value detected by the pressure sensor 250 and transmitted to the control device through the control device; and the reciprocating frequency counting display 130 is used to display the friction value detected by the counting sensor 260 and transmitted to the control device through the control device.

[0036] In some embodiments, the test piece working groove 300 is provided with a temperature measuring sensor, which is used to detect the temperature in the test piece working groove 300 in real time, and transmit the temperature detection value to the control device, and display the temperature detection value on the temperature control display screen 120 through the control device.

[0037] Referring to Figure 1 It can be understood that the control cabinet 100 is further provided with a motor speed controller 140, and the motor speed controller 140 is connected with the driving mechanism 210 and the control device respectively.

[0038] It should be noted that the control device controls the rotation speed of the driving mechanism 210 through the motor speed controller 140, thereby realizing accurate control of the rotation speed of the driving mechanism 210.

[0039] With reference to Figure 1 It can be understood that the transmission mechanism includes a chain transmission mechanism 220 and a crank linkage mechanism 230, one end of the chain transmission mechanism 220 is in transmission connection with the output end of the driving mechanism 210, the other end of the chain transmission mechanism 220 is in transmission connection with the input end of the crank linkage mechanism 230, and the output end of the crank linkage mechanism 230 is connected with one end of the reciprocating linear push rod 240 away from the pressure sensor 250.

[0040] In some embodiments, the chain transmission mechanism 220 includes a first sprocket, a second sprocket and a transmission chain, the first sprocket is connected with the output end of the driving mechanism 210, the second sprocket is connected with the input end of the crank linkage mechanism 230, and the transmission chain is meshed with the first sprocket and the second sprocket respectively.

[0041] It should be noted that the crank linkage mechanism 230 is used to convert the rotary motion of the driving mechanism 210 into reciprocating linear motion and drive the reciprocating linear push rod 240 to move reciprocating linearly. The chain transmission mechanism 220 is used to realize the connection between the driving mechanism 210 and the crank linkage mechanism 230.

[0042] It can be understood that the driving mechanism 210 is a rotary servo motor.

[0043] With reference to Figure 2 It can be understood that the lever mechanism 400 includes a support base 410, a support column 420, a first cross beam 430 and a second cross beam 440, the support column 420 is arranged on the support base 410, the first cross beam 430 is sleeved with a first lever rotating bearing 431, a second lever rotating bearing 432 and a third lever rotating bearing 433, the first lever rotating bearing 431 and the third lever rotating bearing 433 are arranged at two ends of the first cross beam 430 respectively, the second lever rotating bearing 432 is arranged between the first lever rotating bearing 431 and the second lever rotating bearing 432, the first cross beam 430 is connected with the support column 420 through the first lever rotating bearing 431 and the third lever rotating bearing 433, the first cross beam 430 is connected with the second cross beam 440 through the second lever rotating bearing 432, the counterweight weight box 330 is arranged at one end of the second cross beam 440, and the test piece working groove 300 is arranged at the other end of the second cross beam 440, and the test piece working groove 300 is arranged close to the control cabinet 100 and the equipment mounting rack 200.

[0044] With reference to Figure 2It can be understood that the lever mechanism 400 further comprises a connecting column 450, which is arranged at the other end of the second cross beam 440 and on which the test piece working groove 300 is arranged.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements also regarded as the protection scope of the present application.

[0047] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. A simulated test machine for coating friction of sucker rod and tubing, characterized in that, The utility model relates to a kind of oil pipe friction test device, including: The control cabinet is connected with the equipment mounting rack, the driving mechanism is arranged on one side of the equipment mounting rack, one end of the transmission mechanism is in driving connection with the output end of the driving mechanism, the other end of the transmission mechanism is arranged on the equipment mounting rack and is connected with the input end of the reciprocating linear push rod, the reciprocating linear push rod is arranged on the equipment mounting rack, the test piece working groove is arranged on one end of the lever mechanism, the counterweight weight box is arranged on the other end of the lever mechanism, the heating rod and the oil pipe test piece are arranged in the inside of the test piece working groove, the other end of the reciprocating linear push rod is connected with the sucker rod friction test head through the pressure sensor, the oil pipe test piece is arranged at the bottom in the test piece working groove, the sucker rod friction test head is located above the oil pipe test piece, and the counting sensor is connected with the reciprocating linear push rod. The inside of the control cabinet is provided with a control device, and the control device is connected with the driving mechanism, the counting sensor, the pressure sensor, the heating rod respectively. A pressure control display screen, a temperature control display screen and a reciprocating frequency counting display are arranged on the control cabinet, and the control device is connected with the pressure control display screen, the temperature control display screen and the reciprocating frequency counting display respectively.

2. The sucker rod and tubing coating friction simulation tester of claim 1, wherein, A motor speed controller is further arranged on the control cabinet, and the motor speed controller is connected with the driving mechanism and the control device respectively.

3. The sucker rod and tubing coating friction simulation tester of claim 1, wherein, The transmission mechanism includes a chain transmission mechanism and a crank connecting rod mechanism, one end of the chain transmission mechanism is in driving connection with the output end of the driving mechanism, the other end of the chain transmission mechanism is in driving connection with the input end of the crank connecting rod mechanism, and the output end of the crank connecting rod mechanism is connected with one end of the reciprocating linear push rod away from the pressure sensor.

4. The sucker rod and tubing coating friction simulation tester of claim 1, wherein, The driving mechanism is a rotary servo motor.

5. The sucker rod and tubing coating friction simulation tester of claim 1, wherein, The lever mechanism includes a support base, a support column, a first cross beam and a second cross beam, the support column is arranged on the support base, a first lever rotating bearing, a second lever rotating bearing and a third lever rotating bearing are sleeved on the first cross beam, the first lever rotating bearing and the third lever rotating bearing are arranged at two ends of the first cross beam respectively, the second lever rotating bearing is arranged between the first lever rotating bearing and the second lever rotating bearing, the first cross beam is connected with the support column through the first lever rotating bearing and the third lever rotating bearing, the first cross beam is connected with the second cross beam through the second lever rotating bearing, the counterweight weight box is arranged on one end of the second cross beam, and the test piece working groove is arranged on the other end of the second cross beam, and the test piece working groove is arranged close to the control cabinet and the equipment mounting rack.

6. The sucker rod and tubing coating friction simulation tester of claim 1, wherein, ​ 7. The sucker rod and tubing coating friction simulation tester of claim 6, wherein, The lever mechanism further comprises a connecting column, which is arranged at the other end of the second cross beam, and the test piece working groove is arranged on the connecting column.

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