Working device for testing petroleum drilling machine and testing method

Abstract

The invention discloses a working device for testing a petroleum drilling machine and a testing method, and the method comprises the steps: providing pressure for a pedestal of the petroleum drilling machine through a pressure testing device, and obtaining the stress strain condition of each key part of the pedestal of the petroleum drilling machine under a certain pressure load; the tensile test device provides tensile force for the petroleum drilling machine base and the derrick, obtains stress-strain conditions of key parts of the petroleum drilling machine base and the derrick under a certain pressure load, and judges whether design requirements are met or not according to the strain conditions. The device has the advantages of being easy to operate, convenient and fast, the problem that labor and time are wasted when actual drilling testing is carried out is solved, meanwhile, multi-point detection is adopted, the real stress state of the petroleum drilling machine base and the derrick can be comprehensively fed back, and especially for a petroleum drilling machine working in the sea, the design risk of products is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to a working device and a testing method for oil drilling rig testing, and belongs to the technical field of engineering machinery testing. BACKGROUND

[0002] The oil drilling rig belongs to large operation machinery, and working conditions are very complex, and safety requirements are very high; according to standard requirements, product sales should be authenticated, wherein, tension test is needed for the mast, the base and the crown block, actual stress conditions of the oil drilling rig base and the mast are detected to see whether the actual stress conditions meet design requirements, and only after relevant authentication is passed, product sales can be carried out.

[0003] Since the oil drilling rig belongs to large operation machinery, according to the traditional detection method, the stress conditions of the oil drilling rig base and the mast and other structural parts are detected by simply taking several points, the actual stress conditions of the oil drilling rig base and the mast cannot be truly fed back, and great risk is brought to the oil drilling rig product, therefore, it is imperative to design a working device and a testing method for oil drilling rig testing.

[0004] The applicant has found that, when the oil drilling rig is tested by using the existing device, the following problems exist:

[0005] 1. Actual drilling test, that is, after the oil drilling rig is installed, actual drilling operation is carried out, and the stress state of the oil drilling rig base and the mast is detected, but if the maximum hook load of the oil drilling rig is detected, the maximum hook load is reflected in that the number of drill pipes is large, the drilling hole is very deep, and even reaches several thousand meters in depth, and the work amount is large, and it is time-consuming and labor-consuming.

[0006] 2. According to the traditional design method, when the oil drilling rig is designed, the stress analysis of the oil drilling rig base and the mast is carried out by using simulation software, but the analysis result is influenced by the quality of mesh division, the determination of boundary conditions and the simplification of loading, and the result of analysis will have certain error, and the decision of the designer is influenced.

[0007] 3. The test bed foundation adopts a concrete structure, is connected with a ground anchor steel structural part through a foundation bolt, the concrete foundation can bear a load demand of 450t, but the excavation amount of the foundation pit is large, and the amount of poured concrete is also large, and the cost is high. SUMMARY

[0008] Purpose: In order to overcome the deficiencies in the prior art, the application provides a working device and a testing method for oil drilling rig testing, which has the advantages of convenient operation, does not need actual drilling test, and can meet the stress and strain test of the oil drilling rig base and the mast.

[0009] Technical scheme: In order to solve the above technical problems, the technical scheme adopted by the application is:

[0010] The first aspect is a working device for oil drilling rig testing, comprising: a pressure testing device, the pressure testing device comprising: a pressure box body, the bottom of the pressure box body being connected with a plurality of pull rods in sequence, the last pull rod being connected with the top of a cylinder connecting seat, the bottom of the cylinder connecting seat being connected with the piston rod of an oil cylinder, the cylinder body of the oil cylinder being connected with the top of a ground anchor base, the bottom of the ground anchor base being connected with the top of a counterweight box body.

[0011] Optionally, the working device further comprises: a tension testing device, the tension testing device comprising: a traveling block, the bottom of the traveling block being connected with one end of a traveling block connecting seat, the other end of the traveling block connecting seat being connected with a plurality of pull rods in sequence, the last pull rod being connected with the top of a cylinder connecting seat, the bottom of the cylinder connecting seat being connected with the piston rod of an oil cylinder, the cylinder body of the oil cylinder being connected with the top of a ground anchor base, the bottom of the ground anchor base being connected with the top of a counterweight box body.

[0012] Optionally, the bottom of the ground anchor base is connected with the top of the counterweight box body through bolts, washers and nuts.

[0013] Optionally, the counterweight box body is used for placing counterweights.

[0014] Optionally, the ground anchor base comprises: long webs, cross webs, a cover plate, an oil cylinder ear seat, an upper cover plate, a bottom plate, a vertical plate one and a vertical plate three.

[0015] The plurality of long webs are connected with each other through a plurality of cross webs, the bottom of the long web is connected with the bottom plate, the oil cylinder ear seat is arranged on the bottom plate at the middle of the two outermost long webs, the mutually intersecting vertical plate three is clamped on the oil cylinder ear seat, the bottom of the vertical plate three is connected with the bottom plate, and the top of the vertical plate three is provided with the upper cover plate. The bottom of each cross web and the bottom plate are provided with the vertical plate one, and the two cross webs are provided with the detachable cover plate.

[0016] Optionally, the working device further comprises: a web plate, the top of the oil cylinder ear seat being provided with the web plate connected with the upper cover plate.

[0017] Optionally, the working device further comprises: a vertical plate two, the mutually intersecting vertical plate three being fixed with the vertical plate two.

[0018] The second aspect is a testing method of a working device for oil drilling rig testing, specifically comprising:

[0019] Obtaining the tension of the derrick of the oil drilling rig and the pressure of the oil drilling rig base. According to the tension of the derrick and the pressure of the oil drilling rig base, the load of the oil cylinder is set.

[0020] Performing force analysis on the oil drilling rig base and the derrick to obtain the stress values of each position of the oil drilling rig base and the derrick, and marking the force point positions with stress values greater than a threshold value.

[0021] The strain gauges are attached to the stress points corresponding to the base and derrick of the oil drilling rig.

[0022] When testing the tensile force on the derrick, the tensile testing device is loaded according to the various working conditions of the design load.

[0023] Adjust the working pressure of the hydraulic cylinder of the tensile testing device according to the loading tension during loading.

[0024] The maximum strain value at each stress point is obtained using strain gauges.

[0025] The measured maximum strain value is compared with the yield strength and safety factor requirements of the materials selected for the oil drilling rig base and derrick to determine whether it meets the design requirements.

[0026] Optionally, it also includes: when testing the pressure of the oil drilling rig base, loading the pressure testing device according to various working conditions under which the base bears pressure when the drill pipe is fully loaded.

[0027] Adjust the working pressure of the hydraulic cylinder of the pressure testing device according to the loading pressure during loading.

[0028] The maximum strain value at each stress point is obtained using strain gauges.

[0029] The measured maximum strain value is compared with the yield strength and safety factor requirements of the material selected for the oil drilling rig base to determine whether it meets the design requirements.

[0030] Optionally, it also includes displaying the strain value, maximum strain value, corresponding position, and comparison results of each stress point in the form of curves and reports.

[0031] Beneficial effects: The present invention provides a working device and testing method for testing oil drilling rigs. The pressure testing device provides pressure to the oil drilling rig base to obtain the stress and strain of each key part of the oil drilling rig base under a certain pressure load; the tensile testing device provides tensile force to the oil drilling rig base and derrick to obtain the stress and strain of each key part of the oil drilling rig base and derrick under a certain pressure load, and then determines whether the design requirements are met based on the strain.

[0032] This invention has the advantages of simple operation and convenience, solving the problem of labor-intensive and time-consuming testing through actual drilling. It also solves the inconvenience of using wired stress-strain testing, and even the situation where incorrect wiring can lead to inaccurate testing. At the same time, by using multi-point detection, it can comprehensively reflect the true stress state of the oil drilling rig base and derrick, which reduces the design risk of the product, especially for oil drilling rigs operating at sea. Attached Figure Description

[0033] Figure 1 Figure 1 is a structural schematic diagram of one embodiment of a pressure testing device for a working device of a petroleum drilling rig test.

[0034] Figure 2 Figure 2 is a structural schematic diagram of one embodiment of a tension testing device for a working device of a petroleum drilling rig test.

[0035] Figure 3 Figure 3 is a partial enlarged schematic diagram of a ground anchor base and a counterweight box connection.

[0036] Figure 4 Figure 4 is a structural schematic diagram of a ground anchor base.

[0037] Figure 5 Figure 5 is an internal structural schematic diagram of a ground anchor base.

[0038] Figure 6 Figure 6 is an installation schematic diagram of a petroleum drilling rig base during pressure testing.

[0039] Figure 7 Figure 7 is an installation schematic diagram of a petroleum drilling rig base and a derrick during tension testing.

[0040] Figure 1 is a structural schematic diagram of one embodiment of a pressure testing device for a working device of a petroleum drilling rig test. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0042] The present application will be further described below with reference to specific embodiments.

[0043] Embodiment 1:

[0044] The embodiment introduces an embodiment of a working device for testing a petroleum drilling machine, which comprises a pressure testing device 2, as shown in the figure. Figure 1 The pressure testing device 2 comprises a pressure box 201, the bottom of the pressure box 201 is connected to one end of a pull rod 1 212 through a pin shaft 1 202 and a conical pin 1 203, the other end of the pull rod 1 212 is connected to one end of a transition connecting piece 204 through the pin shaft 1 202 and the conical pin 1 203, the other end of the transition connecting piece 204 is connected to one end of a pull rod 2 205 through the pin shaft 1 202 and the conical pin 1 203, the other end of the pull rod 2 205 is connected to the top of a cylinder connecting seat 208 through a pin shaft 2 206 and a conical pin 2 207, the bottom of the cylinder connecting seat 208 is connected to the piston rod of a cylinder 211 through a pin shaft 3 209 and a conical pin 3 210, the cylinder body of the cylinder 211 is connected to the top of an anchor base 213 through the pin shaft 3 209 and the conical pin 3 210, and the bottom of the anchor base 213 is connected to the top of a counterweight box 214.

[0045] The embodiment is used for loading a petroleum drilling machine base through a pressure testing device to provide pressure load for stress testing of the petroleum drilling machine base.

[0046] Further, the embodiment further comprises a tension testing device 5, as shown in the figure. Figure 2 The tension testing device 5 comprises a traveling block 8, the bottom of the traveling block 8 is connected to one end of a traveling block connecting seat 601, the other end of the traveling block connecting seat 601 is connected to one end of a pull rod 3 602 through the pin shaft 1 202 and the conical pin 1 203, the other end of the pull rod 3 602 is connected to the transition connecting piece 204 through the pin shaft 1 202 and the conical pin 1 203, the other end of the transition connecting piece 204 is connected to one end of the pull rod 1 212 through the pin shaft 1 202 and the conical pin 1 203, the other end of the pull rod 1 212 is connected to one end of the transition connecting piece 204 through the pin shaft 1 202 and the conical pin 1 203, the other end of the transition connecting piece 204 is connected to one end of the pull rod 2 205 through the pin shaft 1 202 and the conical pin 1 203, the other end of the pull rod 2 205 is connected to the top of the cylinder connecting seat 208 through the pin shaft 2 206 and the conical pin 2 207, the bottom of the cylinder connecting seat 208 is connected to the piston rod of the cylinder 211 through the pin shaft 3 209 and the conical pin 3 210, the cylinder body of the cylinder 211 is connected to the top of the anchor base 213 through the pin shaft 3 209 and the conical pin 3 210, and the bottom of the anchor base 213 is connected to the top of the counterweight box 214.

[0047] Further, one embodiment, as shown in the figure. Figure 3As shown, the bottom of the ground anchor base 213 is connected to the top of the counterweight box 214 by the bolt 215, the washer 216 and the nut 217.

[0048] The connection strength of the counterweight box and the ground anchor base meets the pressure requirement of the hook load of 450t.

[0049] Further, the counterweight box 214 is used to place the counterweight.

[0050] In order to reduce the cost, the counterweight is used to provide the load force, instead of the ground anchor of the reinforced concrete structure to provide the load force, the weight of the counterweight is 450t, and the gravity is provided during the pressure test, and the weight of the counterweight meets the requirement of the pressure test.

[0051] Further, one embodiment, as shown in Figure 4 、 Figure 5 The ground anchor base 213 includes a long web plate 2131, a transverse web plate 2132, a cover plate 2133, a cylinder ear seat 2134, an upper cover plate 2136, a bottom plate 2137, a vertical plate one 2138 and a vertical plate three 21310.

[0052] The long web plates 2131 are connected to each other by the transverse web plates 2132, the bottom of the long web plate 2131 is connected to the bottom plate 2137, the cylinder ear seat 2134 is arranged on the bottom plate 2137 at the middle of the two outermost long web plates 2131, the vertical plate three 21310 is cross-connected on the cylinder ear seat 2134, the bottom of the vertical plate three 21310 is connected to the bottom plate 2137, and the top of the vertical plate three 21310 is provided with the upper cover plate 2136. The vertical plate one 2138 is arranged between the bottom of each transverse web plate 2132 and the bottom plate 2137, and the cover plate 2133 is arranged between the two transverse web plates 2132.

[0053] During loading, the force is transmitted to the vertical plate three through the cylinder ear seat, and then to the entire ground anchor base, so as to avoid that only the cylinder ear seat is stressed during loading, and the reliability is improved. The cover plate is in the form of assembly, and when the connecting bolt between the ground anchor base and the counterweight box is loose, the cover plate is removed for bolt, washer and nut maintenance.

[0054] Further, one embodiment further includes a rib plate 2135, and the top of the cylinder ear seat 2134 is provided with the rib plate 2135 connected to the upper cover plate 2136.

[0055] Further, one embodiment further includes a vertical plate two 2139, and the vertical plate two 2139 is fixed between the cross-connected vertical plate three 21310.

[0056] Further, one embodiment, the pull rod 212 is a basic component, and the pull rod 212 is a basic component for each model of the oil drilling rig test, and the pull rod 212 is a selected component. According to the size of the oil drilling rig base, the size of the pull rod 212 is adjusted to meet the pressure test requirements of different models of oil drilling rigs.

[0057] Further, one embodiment, the oil cylinder 211 is provided as four, the oil cylinder connecting seat 208 is provided with four oil cylinder connecting holes, and the anchor base is provided with four oil cylinder connecting holes.

[0058] For meeting the test requirements and the manufacturing cost of the oil cylinder.

[0059] Further, it also includes: stress sheet, hydraulic system, electric control system. The stress sheet is used to obtain the shear strain value of the test object, the hydraulic system is used to control the oil cylinder pressure. The electric control system is used to control the pressure of the pressure tank or the tension of the walking beam.

[0060] Embodiment 2:

[0061] This embodiment introduces a test method for a working device for testing an oil drilling rig, as shown in Figure 6 、 Figure 7 Before testing, the pressure tank 201 of the pressure test device is placed on the rotary beam of the oil drilling rig base 1, the oil drilling rig base 1 is placed on the anchor base 213 of the pressure test device 2, the electric control system is composed of cables, display screens and electric control cabinets, the hydraulic system is composed of hydraulic hoses, hydraulic pump stations and solenoid valves, and then the pressure test system is formed.

[0062] The derrick is installed on the oil drilling rig base, connected with the walking beam 8 of the tension test device 5 through the steel wire rope, the electric control system is composed of cables, display screens and electric control cabinets, the hydraulic system is composed of hydraulic hoses, hydraulic pump stations and solenoid valves, and then the tension test system is formed.

[0063] The test bench adopts the counterweight mode, 450t counterweight, the material is scrap iron, placed in the counterweight tank 214, avoids using the concrete structure foundation, if the test bench is relocated, the counterweight tank and the scrap iron can be relocated together, avoids pouring concrete again, reduces resource waste, if the test bench is abandoned, the scrap iron can be sold, the cost is recovered, and the cost is saved.

[0064] The test steps specifically include:

[0065] 1. Loading process:

[0066] The tension of the derrick of the oil drilling rig and the pressure of the oil drilling rig base are obtained. According to the tension of the derrick and the pressure of the oil drilling rig base, the load of the oil cylinder is set.

[0067] The tension of the derrick is determined by the weight of the drill pipe lifted by the derrick plus the friction between the drill pipe and the borehole, and the tension of the derrick is 4500000N.

[0068] The pressure of the oil rig base is determined by bearing the weight of the drill pipe itself, and the pressure of the oil rig base is 3600000N.

[0069] In the design of the device, the tension of the derrick is designed to be 4500000N, and the force is mainly realized through four hydraulic cylinders. The load of each hydraulic cylinder is 1125000N. Considering the safety factor, a hydraulic cylinder with a bearing tension of 2000000N is selected.

[0070] When testing the tension of the derrick, the tension test device is loaded according to 25%, 50%, 75% and 100% of the design load.

[0071] Among them, the tension test conditions of the derrick are divided into four conditions, that is, according to the loading of 25%, 50%, 75% and 100% of the design load 450t, because the device selects four hydraulic cylinders, that is, according to f=1125000N / 4, 2250000N / 4, 3375000N / 4, 4500000N / 4.

[0072] When testing the pressure of the oil rig base, the pressure test device is loaded according to 25%, 50%, 75% and 100% of the pressure of the base bearing when the drill pipe is fully loaded.

[0073] Among them, the pressure test of the oil rig base is divided into four conditions, that is, according to the loading of 25%, 50%, 75% and 100% of the pressure of the base bearing when the drill pipe is fully loaded, and the loading of each cylinder is f=900000N / 4, 1800000N / 4, 2700000N / 4, 3600000N / 4.

[0074] The hydraulic system adjusts the working pressure of the cylinder of the tension test device or the pressure test device according to the loading tension during loading.

[0075] Among them, according to the formula f=a*p, in the formula, f is the tension of the hydraulic cylinder, a is the effective area of the hydraulic cylinder retraction, a=π*(D²-d²) / 4, where D is the area of the cylinder barrel, and d is the area of the cylinder lever.

[0076] Through the above formula, p=f / a is calculated, p is the working pressure of the hydraulic system, that is, when loading, the corresponding loading tension f is adjusted by adjusting the working pressure p of the hydraulic system.

[0077] 2. Stress test process:

[0078] Before the oil drilling rig test, the stress analysis is carried out on the oil drilling rig base and the derrick, the stress values of each position of the oil drilling rig base and the derrick are obtained, and the stress point positions with stress values greater than the threshold value are marked out for better reflecting the stress state of the oil drilling rig base and the derrick.

[0079] The strain gauges are pasted to the stress point positions corresponding to the oil drilling rig base and the derrick.

[0080] The strain gauge principle is to transmit the internal strain of the structural member through the electrical signal, and the stress point position cannot have rust, otherwise the measurement accuracy of the strain gauge is affected.

[0081] The formula τ=G*Υ is used, where τ is the shear stress, G is the elastic modulus, is the elastic modulus of the material selected for the oil drilling rig base and the derrick, and Υ is the shear strain, which is the shear strain value measured by the strain gauge.

[0082] Therefore, the formula τ=G*Υ is used to compile the program and display it on the display, so as to measure the τ value.

[0083] During the oil drilling rig test, the maximum τ value of each stress point position is obtained by the strain gauge.

[0084] Among them, multiple points need to be measured, and multiple τ values are measured at the same time. When the program is compiled, the τ measurement program of multiple points is reflected, and the report and curve forms are displayed on the display. At the same time, the maximum τ value of multiple points can be displayed on the display.

[0085] The measured maximum τ value is compared with the yield strength and safety factor requirement of the material selected for the oil drilling rig base and the derrick to determine whether it meets the design requirement value.

[0086] Among them, the formula τ=F / A is used, where F is the measured force, A is the stress area, and the material is the material cross-sectional area of the oil drilling rig base measurement position and the material cross-sectional area of the derrick measurement position.

[0087] Therefore, the formula F=τ*A= G*Υ* A is used to compile the program, where F and G can be edited on the program and displayed on the display, so as to measure the F value, i.e. the maximum bearing capacity.

[0088] 3. Application of test results:

[0089] The actual stress of the oil drilling rig base and the derrick is measured, and multiple measurement points required are reflected in the form of curve and report. The stress value and the corresponding position of the oil drilling rig base and the derrick, as well as the maximum stress point and the corresponding position, are reflected. Then, the data error is compared with the design calculation value and the simulation analysis result to determine whether it meets the design requirement.

[0090] Example 3:

[0091] This embodiment describes the working process of a working device for testing oil drilling rigs, specifically including:

[0092] During the pressure test, the pressure regulating valve of the hydraulic system is adjusted to adjust the hydraulic system pressure to the design required pressure value, and the pressure value is displayed on the pressure gauge. The electronic control system is turned on, the lever of cylinder 211 retracts, and under the system pressure, the system pressure is applied to the oil drilling rig base through the pressure box.

[0093] The testing system includes strain gauges that collect stress and strain data and transmit it wirelessly to a wireless static strain test and analysis system. The wireless static strain test and analysis system analyzes and processes the strain gauge data and transmits it to a wireless communication controller via a wireless network. The wireless communication controller is connected to a computer via a USB interface, and the computer software presents the collected strain gauge data in the form of reports or graphs and outputs a test report.

[0094] To meet the needs of measurement data processing, multiple strain gauges are used, and a certain number of strain gauges are set as one channel. The strain gauges are then assigned to multiple channels, and the data is transmitted to the wireless static strain test and analysis system for data analysis and processing. This greatly expands the data collected by the strain gauges and truly reflects the stress state.

[0095] The oil drilling rig base is subjected to static loads, and given its large size, wireless static strain testing is used to measure stress and strain at multiple points to determine whether the stress conditions of the oil drilling rig base meet the design requirements.

[0096] First, based on the working conditions and load of the oil drilling rig, several key stress points on the oil drilling rig base 1 are identified. Stress strain gauges are then attached to these stress points. Under stress conditions, the stress and strain at these key stress points are detected by the strain gauges and input into the computer via the acquisition module channel. After computer processing, the data is output as a report or curve. Based on the material properties of the oil drilling rig base 1, the data is input into the computer and compared with the actual detected stress and strain. An inspection report for the oil drilling rig base 1 is then output to determine whether the oil drilling rig base meets the design requirements.

[0097] During the tensile test, the pressure regulating valve of the hydraulic system is adjusted to adjust the hydraulic system pressure to the design required pressure value, and the pressure value is displayed on the pressure gauge. The electronic control system is turned on, the lever of the oil cylinder 211 is retracted, and under the system pressure, the system tensile force is applied to the derrick 6 through the wire rope 7 and the traveling carriage 8.

[0098] Based on the working conditions and load of the oil drilling rig, several key stress points on the derrick were identified. Stress strain gauges were then attached to these stress points. Under stress conditions, the stress and strain at these key stress points were detected by the strain gauges and input into the computer via the acquisition module channel. After computer processing, the data was output as a report or curve. Based on the material properties of the derrick, the data was input into the computer and compared with the actual detected stress and strain. An inspection report for the derrick was then output to determine whether the derrick meets the design requirements.

[0099] The stress-strain test uses a multi-channel acquisition module, that is, one module corresponds to multiple stress-strain gauges for testing. By using multiple acquisition modules for testing at the same time, it is possible to test as many key points as possible on the oil base 1 and the derrick 6, reducing the occurrence of judgment errors due to insufficient test points.

[0100] The stress-strain test uses a wireless module, where stress-strain gauges transmit signals wirelessly to the acquisition module via a wireless network. Multiple modules are integrated together and connected to a computer via a USB port, making the test convenient and fast. The oil base 1 test uses a wireless stress-strain test system with 132 stress-strain gauges, 64 channels, and a total of 4 modules.

[0101] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A working device for testing oil drilling rigs, characterized in that: include: A pressure testing device, comprising: a pressure chamber, with a plurality of pull rods sequentially connected to the bottom of the pressure chamber, the last pull rod being connected to the top of a cylinder connecting seat, the bottom of the cylinder connecting seat being connected to the piston rod of a cylinder, the cylinder body being connected to the top of a ground anchor base, and the bottom of the ground anchor base being connected to the top of a counterweight box.

2. The working device for testing oil drilling rigs according to claim 1, characterized in that: Also includes: A tensile testing device, comprising: a traveling trolley, the bottom of which is connected to one end of a traveling trolley connecting seat, the other end of which is sequentially connected to a plurality of pull rods, the last pull rod being connected to the top of a hydraulic cylinder connecting seat, the bottom of the hydraulic cylinder connecting seat being connected to the piston rod of a hydraulic cylinder, the cylinder body being connected to the top of a ground anchor base, and the bottom of the ground anchor base being connected to the top of a counterweight box.

3. A working device for testing oil drilling rigs according to claim 1 or 2, characterized in that: The bottom of the ground anchor base is connected to the top of the counterweight box by bolts, washers and nuts.

4. A working device for testing oil drilling rigs according to claim 1 or 2, characterized in that: The counterweight box is used to hold the counterweight.

5. A working device for testing oil drilling rigs according to claim 1 or 2, characterized in that: The ground anchor base includes: a long web plate, a horizontal web plate, a cover plate, a cylinder lug seat, an upper cover plate, a bottom plate, a vertical plate one, and a vertical plate three; Several long webs are connected in pairs by several transverse webs. The bottom of each long web is connected to a base plate. The base plate in the middle of the two outermost long webs is provided with a cylinder lug seat. Intersecting vertical plates are snapped onto the cylinder lug seats. The bottom of the vertical plates is connected to the base plate. The top of the vertical plates is provided with a top cover plate. Each transverse web is provided with a vertical plate between its bottom and the base plate. A detachable cover plate is provided between each pair of transverse webs.

6. The working device for testing oil drilling rigs according to claim 5, characterized in that: Also includes: The top of the cylinder lug is provided with a stiffening rib that is connected to the upper cover plate.

7. A working device for testing oil drilling rigs according to claim 6, characterized in that: Also includes: The second upright plate is fixed between the intersecting third upright plates.

8. The test method for the working device according to any one of claims 1-7, characterized in that: Specifically, it includes: Obtain the tension of the derrick and the pressure of the derrick base; set the load on the hydraulic cylinder based on the tension of the derrick and the pressure of the derrick base. Stress analysis was performed on the oil drilling rig base and derrick to obtain the stress values ​​at various locations on the oil drilling rig base and derrick, and the locations of stress points with stress values ​​greater than the threshold were marked. Attach the strain gauges to the stress points corresponding to the base and derrick of the oil drilling rig. When testing the tensile force on the derrick, the tensile testing device is loaded according to various working conditions of the design load; Adjust the working pressure of the hydraulic cylinder of the tensile testing device according to the loading tension during loading; The maximum strain value at each stress point is obtained using strain gauges. The measured maximum strain value is compared with the yield strength and safety factor requirements of the materials selected for the oil drilling rig base and derrick to determine whether it meets the design requirements.

9. The test method according to claim 8, characterized in that: Also includes: When testing the pressure of the oil drilling rig base, the pressure testing device is loaded according to various working conditions under which the base bears pressure when the drill pipe is fully loaded; Adjust the working pressure of the hydraulic cylinder of the pressure testing device according to the loading pressure during loading; The maximum strain value at each stress point is obtained using strain gauges. The measured maximum strain value is compared with the yield strength and safety factor requirements of the material selected for the oil drilling rig base to determine whether it meets the design requirements.

10. The test method according to claim 8 or 9, characterized in that: Also includes: The strain value, maximum strain value, corresponding position, and comparison results of each stress point are displayed in the form of curves and reports.

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