Wellhead under-pressure operation device detection system and working method

Abstract

The invention provides a wellhead under-pressure operation device and a working method. A detection system is composed of a derrick, a test mandrel, a lifting nipple, a circulating throttling device, an under-pressure operation device to be detected, a rotating assembly, a hydraulic system and a data acquisition and control system. The rotating assembly, the testing mandrel, the under-pressure operation device to be tested and the lifting short section are all installed on the derrick, the upper portion of the testing mandrel is connected with a flange on the lower portion of the rotating assembly through bolts, a lower flange of the lifting short section is connected with a blind flange, and an upper flange of the lifting short section is connected with the under-pressure operation device to be tested. The circulating throttling device and the under-pressure device to be tested form a circulating channel, the rotating assembly is driven by hydraulic power provided by the hydraulic system to drive the test mandrel to rotate, and the data acquisition and control system realizes real-time acquisition, display, storage and playback of data and videos of the detection system. According to the invention, one set of detection system can complete detection of multiple detection items and different types of under-pressure devices.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling, and in particular relates to a detection system and a working method of a wellhead pressure operation device. Background Art

[0002] Underbalanced drilling and managed pressure drilling require precise control of wellbore pressure during the drilling process to maintain a reasonable pressure difference between bottomhole pressure and formation pressure in order to increase drilling speed and protect oil and gas layers. For this purpose, a variety of new wellhead pressure operation devices have been developed on the market, such as RCD rotary blowout preventers and pressure-operated blowout preventers. These pressure-operated devices can effectively seal the wellhead annular space pressure during drill string rotation or drilling and tripping operations to achieve dynamic pressure control. These devices need to be fully functionally confirmed before they are put into service, otherwise they cannot be effectively sealed or pressure controlled, resulting in the risk of fluid leakage in the well, causing blowout accidents, seriously threatening personnel life safety, damaging the environment and causing huge economic losses. Therefore, a complete detection system is needed.

[0003] Most of the existing technologies use different devices to perform rotary dynamic pressure tests or tripping tests on rotary blowout preventers or other types of blowout preventers. Such multiple sets of test devices are costly and have low test efficiency. In addition, the existing technology cannot effectively simulate the drilling process, that is, the existing test devices cannot drill while rotating. Summary of the invention

[0004] The purpose of the present invention is to solve the defects of the above-mentioned prior art and to provide a wellhead pressurized operation device detection system and working method to solve the installation of the product to be tested, rotational dynamic pressure detection, rated drilling and lowering detection and simulated drilling detection, so that a set of detection system can complete multiple detection items and different types of pressurized device detection.

[0005] The present invention adopts the following technical solution: A detection system for a wellhead pressure working device, the detection system is composed of a derrick, a test mandrel, a lifting short section, a circulation throttling device, a pressure working device to be tested, a rotating assembly, a hydraulic system, and a data acquisition and control system. The rotating assembly, the test mandrel, the pressure working device to be tested, and the lifting short section are all installed on the derrick. The upper part of the test mandrel is connected to the lower flange of the rotating assembly by bolts. The lower flange of the lifting short section is connected to the blind flange, and the upper flange of the lifting short section is connected to the pressure working device to be tested. The circulation throttling device and the pressure working device to be tested form a circulation channel. The rotating assembly drives the test mandrel to rotate under the hydraulic power provided by the hydraulic system. The data acquisition and control system realizes the real-time acquisition, display, storage and playback of data and video of the detection system.

[0006] Furthermore, the data acquisition and control system includes an equipment-side operating console, a detection system control room and a cross-regional command center, all of which are connected to the host computer and are interlocked with each other, so that the detection system can be controlled at any location as needed.

[0007] Furthermore, the derrick is composed of a mandrel installation assembly, a drilling beam, a drilling assembly, a transfer device, a base, a derrick back steel frame, a derrick column and a top support. The mandrel installation assembly is installed on the outside of the derrick column, the top support is installed on the upper side of the mandrel installation assembly, and the lower side is installed on the flange of the middle step of the derrick column. The upper part of the drilling beam supports the rotating assembly, and the two sides of the drilling beam are connected to the drilling assembly. The drilling beam is provided with a guide wheel, so that the drilling beam moves up and down along the guide plate of the derrick column. The drilling assembly has a drilling cylinder.

[0008] The transport device can move the elevated short section and the pressurized operating device to be tested along the guide rail direction. When the transport device moves to the wellhead sensing block position, the centers of the rotating assembly, the test mandrel and the pressurized operating device to be tested coincide. When the transport device moves to the clamping sensing block position, the mandrel installation assembly coincides with the center of the pressurized operating device to be tested.

[0009] The guide rail assembly of the transport device is fixed on the base, and the slider of the guide rail is connected to the bolts of the transport device. The base is fixed to the prefabricated foundation by anchor bolts. The derrick back steel frame is connected to the derrick column with the positioning pin as a whole. The top support connects the top of the derrick column into a whole.

[0010] Furthermore, the mandrel installation assembly is composed of a mandrel installation beam, a pin shaft I, a mandrel installation cylinder, a bottom mounting seat, a guide shaft, a top mounting seat and a locking nut I. The guide shaft is assembled between the bottom mounting seat and the top mounting seat and fixed with a locking nut I. The guide seat in the mandrel installation beam is installed on the guide shaft and can slide up and down freely. The test mandrel is hoisted into the mandrel installation beam and locked. The mandrel installation beam is connected to the mandrel installation cylinder through the pin shaft I. The mandrel installation cylinder extends and moves the mandrel installation beam and the test mandrel along the guide shaft to an appropriate height. When the transfer device moves to the clamping sensing block, the mandrel installation cylinder retracts and presses down with the mandrel installation beam, pressing the test mandrel into the predetermined height in the pressure-carrying device to be tested, and completing the clamping.

[0011] Furthermore, the mandrel installation crossbeam is composed of an ear seat, a welding assembly, a guide seat, a clamping cylinder, a locking block, a pin shaft II, and a bearing device. The ear seat and the mandrel installation cylinder are connected together by a pin shaft I. The ear seat, the guide seat and the bearing device are all installed on the welding assembly. The pin shaft II connects the clamping cylinder and the locking block into a whole. When the test mandrel is installed in place along the guide surface of the bearing device, the piston rods of the two clamping cylinders extend, and the locking block is driven by the pin shaft II to clamp the test mandrel in the bearing device. Under the action of the mandrel installation cylinder, the test mandrel moves up and down stably as needed.

[0012] Furthermore, the guide seat is composed of a support seat I, a pressure plate, a bearing V, and a bearing seat. The support seat is fixed on the core shaft mounting crossbeam by bolts, the bearing V is installed on the bearing seat, and the pressure plate is tightened by bolts to fix the bearing V on the bearing seat.

[0013] Furthermore, the drilling beam is composed of a guide wheel assembly, a beam welding assembly, a welding flange I and a double-ear seat for the drilling cylinder. The guide wheel is fixed to the beam welding assembly with bolts. The double-ear seat for the drilling cylinder is installed on both sides of the beam welding assembly, the double-ear seat for the drilling cylinder is connected to the drilling cylinder, the welding flange I is installed on the beam welding assembly, and the welding flange I is used to install and fix the rotating assembly.

[0014] Furthermore, the guide wheel assembly is composed of 16 guide wheels.

[0015] Furthermore, the guide wheel assembly is composed of a guide wheel, a locking nut II, a shaft, a support seat II, a bearing IV, and a spacer. The bearing IV is assembled into the inner cavity of the guide wheel to form a guide wheel assembly, the shaft is assembled with the spacer and the guide wheel assembly in sequence on one side of the support seat II, and the locking nut II is installed on the other end of the shaft to lock it.

[0016] Furthermore, the drilling assembly is composed of an adjustment pup joint, a drilling cylinder and a pin shaft III. The lower part of the adjustment pup joint is fixed to the base with bolts, the drilling cylinder and the adjustment pup joint are connected with bolts, the drilling cylinder piston rod ear plate and the drilling cylinder double ear seat are assembled together with the pin shaft III, and the drilling cylinder telescopes to drive the drilling beam to move up and down.

[0017] Furthermore, the transport device is composed of a clamping induction block, a wellhead induction block, a locking plate, a translation cylinder, a slider, a pin shaft IV, a guide rail, a support seat III, a flange II, a locking ear plate I, a translation cylinder double-ear seat and a positioning sensor. The clamping induction block, the wellhead induction block and the guide rail are all installed on the base, and the flange II, the locking ear plate I and the translation cylinder double-ear seat are welded on the support seat III to form a transport module, and the transport module is connected to the multiple sliders of the guide rail by bolts. One end of the translation cylinder is connected to the translation cylinder double-ear seat by a pin shaft IV, and the other end is installed on the translation cylinder mounting seat of the base and locked by a locking plate and bolts. When the translation cylinder drives the transport device to reach the position of the clamping induction block or the wellhead induction block, the positioning sensor will sense it and send a signal, and the translation cylinder stops moving to complete the transport function.

[0018] Furthermore, the base is composed of a guide rail mounting seat, a base box, anchor bolts, a positioning pin I, a translation cylinder mounting seat, a locking ear plate II, a square flange I and a welding flange II. The guide rail mounting seat, the translation cylinder mounting seat, the locking ear plate II, the square flange I and the welding flange II are installed on the base box, and the positioning pin I is installed on the square flange I. The base is fixed with prefabricated anchor bolts, and the welding flange II is used to fix the drilling cylinder and adjust the short section; the square flange I and the positioning pin I are installed in conjunction with the positioning hole of the derrick column; the locking ear plate II is matched with the locking ear plate I and the pin shaft.

[0019] Furthermore, the derrick back steel frame is composed of a connection plate I, a welded steel frame, and a positioning pin II. The connection plate I is installed on the welded steel frame, and the positioning pin II is installed on the connection plate I. The four positioning pins of the derrick back steel frame cooperate with the positioning holes of the derrick column, and the connection plate I of the derrick back steel frame and the connection plate II of the derrick column are fixed as a whole by bolts.

[0020] Furthermore, the four positioning pins II of the derrick back steel frame cooperate with the positioning holes of the derrick column mounting back steel frame.

[0021] Furthermore, the derrick column is composed of a left column, a cylinder fixing card, a cylinder fixing seat, a flange II, a flange III, a right column, a connecting plate II, a flange III, a positioning pin III, and a guide plate. Two flanges III and a cylinder fixing card are respectively arranged on the left column and the right column; the cylinder fixing seat is symmetrically arranged on the left column and the right column; four flanges III and four positioning pins III are designed on the upper end faces of the left column and the right column, and the positioning pins III are installed on the flange III; six flanges II are designed on the lower end faces of the left column and the right column, and the flange II has a positioning hole, which cooperates with the positioning pin I of the base. Guide plates are also installed on the left column and the right column.

[0022] Further, the top support is composed of a support column, a flange IV, a top support beam, a ladder and a handrail. The support column, the ladder and the handrail are installed on the upper part of the top support beam, and the flange IV is installed on the bottom.

[0023] Further, the test mandrel is composed of a top short section, a short section I, a short section II, a short section III, a drill pipe joint I, a drill pipe joint II and a bottom short section. The test mandrel is composed of a top short section and a bottom short section in combination with a short section I, a short section II, a short section III, a drill pipe joint I and a drill pipe joint II to form various combinations required for testing.

[0024] Furthermore, the circulation throttling device is composed of a storage tank, a pump, a high-pressure pipeline A, a high-pressure pipeline B, a throttle valve, a low-pressure pipeline, a flow meter, an electric switch valve, a safety valve, a switch valve control cabinet, a sewage tank, an energy storage device group, an electric pump and an electric pump control cabinet. The pump sucks clean water, or oil-based mud, or water-based mud from the storage tank, and outputs high-pressure fluid through the pump. The high-pressure fluid enters the pressure-carrying device to be tested through the high-pressure pipeline A, passes through the rising short section and enters the throttle valve along the high-pressure pipeline B. The pressure in the pressure-carrying device to be tested is adjustable by adjusting the throttle valve. After passing through the throttle valve, the fluid returns to the storage tank through the low-pressure pipeline and the flow meter.

[0025] When performing the drilling inspection task, close the above-mentioned pump and throttle valve circuit, operate the button of the electric pump control cabinet, start the electric pump to pressurize the inner cavity of the pressurized working device to be tested, and when the pressure in the inner cavity of the pressurized working device to be tested reaches the target value, operate the closing valve control cabinet to open the electric switch valve and connect it to the energy storage device group. A safety valve is configured in the drilling fluid supply circuit. When abnormally high pressure occurs under the drilling condition and exceeds the set value of the safety valve, the safety valve automatically opens and the fluid enters the sewage pool.

[0026] Furthermore, the rotating assembly is composed of a bracket, a bearing seal I, a sealing gland, a transmission box, a key, a bearing seal II, a center shaft, a flange IV, a transmission key, an oil cup, a bearing III, a bearing II, a bearing I, a compression screw sleeve, a speed torque sensor I, a coupling, a locking screw and a motor. The bracket is fixed to the flange of the transmission box, the motor is mounted on the upper end face of the bracket with bolts, the transmission box is mounted on the welding flange of the tripping beam with bolts, the motor is connected to the speed torque sensor I with a coupling and a locking screw, the speed torque sensor I and the center shaft use a key to transmit torque, the center shaft and flange IV are fixed together with a transmission key, and the rotation of the motor will rotate with the speed torque sensor I, the center shaft and flange IV.

[0027] The center shaft is supported by two layers of bearings II, so that it can withstand both pressure and tension while rotating. Bearings III and I align the center shaft, and bearing seals I and II seal the four layers of bearings up and down to form a lubrication cavity, and grease is added through the oil cup.

[0028] Furthermore, the hydraulic system is powered by a dedicated transformer, and is equipped with a main motor soft starter and an auxiliary motor soft starter respectively; the main motor soft starter drives the main hydraulic pump to provide hydraulic power to the motor and the drilling cylinder. The auxiliary motor soft starter drives the auxiliary hydraulic pump to provide hydraulic power to the translation cylinder, the clamping cylinder, and the mandrel installation cylinder. The main hydraulic pump and the auxiliary hydraulic pump are also connected to the hydraulic oil tank, and the hydraulic oil tank is connected to the hydraulic cooling system.

[0029] Furthermore, the data acquisition and control system consists of a hydraulic system, a sensor detection device, a camera, a lower computer, a host computer, an equipment-side console, a detection system control room, and a cross-regional command center. The sensor detection device consists of various required displacement, pressure, temperature, flow and force sensors. The sensor is connected to the junction box, and the signal is sent from the junction box to the lower computer using a multi-core cable to complete data acquisition. The data is further uploaded to the host computer. The required camera is configured according to the monitoring needs, and the camera network cable is connected to the router and then connected to the host computer.

[0030] Furthermore, the sensor detection device is composed of a liquid level sensor, an inlet pressure sensor, an outlet pressure sensor, a displacement sensor I, a displacement sensor II, a temperature sensor, a force sensor I, a speed torque sensor II, a displacement sensor III and a force sensor II. The temperature sensor is installed on the outside of the shell of the pressure device to be tested, the liquid level sensor is installed on the reserve tank, the inlet pressure sensor and the outlet pressure sensor are installed at the outlet and inlet of the pressure device to be tested respectively; the displacement sensor I, the displacement sensor II and the displacement sensor III are installed on the drilling cylinder, the mandrel installation cylinder and the clamping cylinder respectively, the force sensor I and the force sensor II are installed on the end of the test mandrel, and the speed torque sensor II is installed on the rotating assembly.

[0031] The present invention provides a working method of a detection system for a wellhead pressure operation device, comprising: When performing a rotational dynamic pressure test, follow these steps: Step 1. Install the lifting nipple; Step 2. Install the pressure-carrying device to be tested onto the lifting nipple; Step 3. Adjust the position of the transport device so that the transport device is at the position where the sensing block is clamped, ensuring that the center of the pressure-carrying device to be tested coincides with the center of the mandrel installation assembly; Step 4. Lift the test mandrel and clamp it with the clamping cylinder, and operate the mandrel installation cylinder to press the test mandrel into the pressure-carrying device to be tested; Step 5. Operate the transport device to move the installed pressure-operated device to be tested to the wellhead, and then connect the lower flange of the rotating assembly to the flange of the test mandrel; Step 6. Close high-pressure pipeline A, close high-pressure pipeline B, and close the electric switch valve; Step 7. Use an electric pump to pressurize the pressure-carrying device to be tested to the test pressure, and reduce the pressure to zero after completing the static pressure test; Step 8. Start the electric pump again to pressurize the pressure-carrying device to be tested to the target value of the dynamic pressure test pressure, start the hydraulic system, and operate the upper computer to start the rotating assembly motor to gradually increase the test mandrel speed to the test target value; Step 9. After the pressure-carrying device to be tested completes the predetermined test time under the target pressure and target speed conditions, the pressure of the pressure-carrying device to be tested is reduced to zero, and the electric pump is used to pressurize the device again for static pressure test. After the static pressure test is completed, the pressure is reduced to zero, and the rotational dynamic pressure test is completed. When performing the tripping test, follow the steps below:

[0032] Step 1. Complete the above-mentioned rotational dynamic pressure test steps 1 to 5, that is, complete the installation of the pressure-carrying working device to be tested; Step 2. Close high-pressure pipeline A, close high-pressure pipeline B, start the electric pump to pressurize to the target pressure value, open the electric switch valve, ensure that the pressure-carrying device to be tested is connected to the energy storage device, and use the electric pump to pressurize to the target value of the tripping test again; Step 3. Start the hydraulic system, operate the upper computer to control the stroke and speed of the drilling cylinder, gradually adjust the stroke and speed of the drilling cylinder to the test target value, and start counting the number of joints passed by the drilling; Step 4. When the number of tripping joints reaches the predetermined target value, the test is terminated, the electric switch valve is closed, and the pressure of the pressurized operating device to be tested is reduced to zero to complete the test.

[0033] When conducting a simulated drilling test, the following steps are included: Step 1. Complete the above-mentioned rotational dynamic pressure test steps 1 to 5, that is, complete the installation of the pressure-carrying working device to be tested; Step 2. Open high-pressure pipeline A, open high-pressure pipeline B, keep the throttle valve fully open, and close the electric switch valve; Step 3. Start the hydraulic system, operate the upper computer to control the rotating assembly so that the motor drives the test mandrel to rotate, and control the tripping cylinder so that the test mandrel can move up and down; after completing the above operations, the test mandrel can also achieve rotary drilling while moving up and down; Step 4. Start the pump, and the circulating fluid enters the pressure-carrying device to be tested through the high-pressure pipeline A, flows back to the high-pressure pipeline A through the pressure-carrying device to be tested, and returns to the pump reserve tank after passing through the throttle valve. The throttle valve opening is adjusted to achieve the drilling target pressure; Step 5. After completing the above operations, complete the simulation of drilling pressure, rotation speed, and drilling speed conditions, and complete the test after reaching the predetermined test time.

[0034] Beneficial effects of the present invention: The present invention is a modular design and a quick-installation positioning design. It can be transported as a whole or disassembled into modules, which is convenient for quick moving and quick installation. The detection system can realize the quick installation of the test mandrel, and the detection system can realize the high-speed rotation of the test mandrel to simulate constant speed or constant torque drilling. The detection system can realize the adjustable pressure of the inner cavity of the pressure-carrying operation device to be tested, simulating the pressure of the circulating fluid in the drilling annulus.

[0035] The detection system can realize tripping and rotary drilling, simulating rotary drilling and tripping; the detection system is equipped with a data acquisition system that can display, record, save and play back relevant detection data and videos on the same time axis in real time; the detection system is equipped with a remote control system, which is away from high-pressure fluids and can be remotely controlled in a control room or command center to achieve inherent safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the derrick structure; Figure 3 This is a schematic diagram of the structure of the mandrel installation assembly; Figure 4 Schematic diagram of the mandrel installation beam structure, (a) is the general diagram of the mandrel installation beam assembly; (b) is the principle diagram of the test mandrel clamping; Figure 5 It is a schematic diagram of the guide seat structure; Figure 6 This is a schematic diagram of the drilling beam structure; Figure 7 Schematic diagram of the guide wheel structure; Figure 8 The figure is a schematic diagram of the structure of the tripping assembly; Fig. 9 Schematic diagram of the structure of the transport device, (a) is a cross-sectional view of the transport device assembly, and (b) is a partial enlarged view of the parts; Fig.10 is a schematic diagram of the base structure; Fig.11 This is a schematic diagram of the derrick back steel frame; Fig.12 This is a schematic diagram of the derrick column structure; Fig.13 is a schematic diagram of the top support structure; Fig.14Schematic diagram of the test mandrel structure, (a) is a schematic diagram of the test mandrel double joint combination, (b) is a schematic diagram of the test mandrel single joint combination, (c) is a schematic diagram of the test mandrel single joint dynamic pressure test shaft combination, (d) is the top short section parts drawing, (e) short section I parts drawing, (f) is the short section II parts drawing, (g) drill pipe joint I parts drawing, (h) is the short section III parts drawing, (i) is the drill pipe joint II parts drawing, (j) is the bottom short section parts drawing; Fig.15 It is a schematic diagram of a circulation throttling device; Fig.16 It is a schematic diagram of the rotating assembly structure; Fig.17 This is the schematic diagram of the hydraulic system; Fig.18 This is the schematic diagram of the data acquisition and control system; Fig.19 It is a schematic diagram of the structure of the sensor detection device.

[0037] In the figure: 1-derrick, 2-test mandrel, 3-elevation sub, 4-circulation throttling device, 5-pressure operation device to be tested, 6-rotating assembly, 7-hydraulic system, 8-data acquisition and control system, 9-equipment end operating table, 10-detection system control room, 11-cross-regional command center; A1- mandrel installation assembly, A2- tripping beam, A3- tripping assembly, A4- transport device, A5- base, A6- derrick back steel frame, A7- derrick column, A8- top support; B1-spindle mounting crossbeam, A101-pin shaft Ⅰ, A102-spindle mounting cylinder, A103-bottom mounting seat, A104-guide shaft, A105-top mounting seat, A106-locking nut Ⅰ; B101-ear seat, B102-welding assembly, C1-guide seat, B103-clamping cylinder, B104-locking block, B105-pin shaft II, B106-bearing device; C101-support seat Ⅰ, C102-pressure plate, C103-bearing Ⅴ, C104-bearing seat; D1-guide wheel assembly, A201-crossbeam welding assembly, A202-welding flange I, A203-drilling cylinder double ear seat; D101-guide wheel, D102-locking nut Ⅱ, D103-shaft, D104-support seat Ⅱ, D105-bearing Ⅳ, D106-spacer; A301-adjustment nipple, A302-drilling cylinder, A303-pin shaft III; A401- clamping induction block, A402- wellhead induction block, A403- locking plate, A404- translation cylinder, A405- slide block, A406- pin shaft Ⅳ, A407- guide rail, A408- support seat Ⅲ, A409- flange Ⅱ, A410- locking ear plate Ⅰ, A411- translation cylinder double ear seat, A412- positioning sensor; A501-guide rail mounting seat, A502-base box, A503-anchor bolt, A504-locating pin Ⅰ, 505-translation cylinder mounting seat, A506-locking ear plate Ⅱ, A507-square flange Ⅰ, A508-welding flange Ⅱ; A601-connecting plate Ⅰ, A602-welded steel frame, A603-locating pin Ⅱ; A701-left column, A702-cylinder fixing card, A703-cylinder fixing seat, A704-square flange Ⅱ, A705-flange Ⅲ, A706-right column, A707-connecting plate Ⅱ, A708-square flange Ⅲ, A709-locating pin Ⅲ, 710-guide plate; A801-support column, A802-Flange IV, A803-top support beam, A804-ladder and railing; 201-top short section, 202-short section I, 203-short section II, 204-short section III, 205-drill pipe joint I, 206-drill pipe joint II, 207-bottom short section; 401-reserve tank, 402-pump, 403-high-pressure pipeline A, 404-high-pressure pipeline B, 405-throttle valve, 406-low-pressure pipeline, 407-flow meter, 408-electric switch valve, 409-safety valve, 410-switch valve control cabinet, 411-sewage tank, 412-accumulator group, 413-electric pump, 414-electric pump control cabinet; 601- bracket, 602- bearing seal Ⅰ, 603- sealing gland, 604- transmission box, 605- key, 606- bearing seal Ⅱ, 607- center shaft, 608- flange Ⅳ, 609- transmission key, 610- oil cup, 611- bearing Ⅲ, 612- bearing Ⅱ, 613- bearing Ⅰ, 614- compression screw sleeve, 615- speed torque sensor Ⅰ, 616- coupling, 617- locking screw, 618- motor; 801-liquid level sensor, 802-inlet pressure sensor, 803-outlet pressure sensor, 804-displacement sensor I, 805-displacement sensor II, 806-temperature sensor, 807-force sensor I, 808-speed torque sensor II, 809-displacement sensor III, 810-force sensor II. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1 As shown, a detection system for a wellhead pressure working device of the present invention is composed of a derrick 1, a test mandrel 2, a lifting short section 3, a circulation throttling device 4, a pressure working device to be tested 5, a rotating assembly 6, a hydraulic system 7, and a data acquisition and control system 8. The rotating assembly 6, the test mandrel 2, the pressure working device to be tested 5 and the lifting short section 3 are all installed on the derrick 1. The derrick 1 is the main mechanical mechanism of the entire detection system, the force support of the system, and bears the load of drilling and drilling, provides motion guidance for drilling and drilling, and bears the rotation torque. The upper part of the test mandrel 2 is connected to the lower flange of the rotating assembly 6 by bolts. The test mandrel 2 is used to transmit the torque of the rotating assembly 6, bear the inner cavity pressure of the pressure working device to be tested 5, and realize the simulation of the drilling site drill pipe. The lifting short section 3 can be composed of short sections of different specifications and different numbers according to the needs of the lower flange interface of the pressure working device to be tested 5. The lower flange of the lifting short section 3 is connected to the blind flange, and the upper flange of the lifting short section 3 is connected to the pressure working device to be tested 5. The lifting short section 3 is used to simulate the wellhead so that the test mandrel 2 has enough movement stroke to meet the detection system's simulated drilling conditions and simulated rotary drilling conditions. The circulating throttling device 4 is composed of a pump and a throttle valve, and forms a circulation channel with the pressure device 5 to be tested, providing a flowing and pressure-adjustable circulating fluid for the inner cavity of the pressure device 5 to be tested, and also realizes the cooling of the pressure device 5 to be tested. The rotating assembly 6 drives the test mandrel 2 to rotate under the hydraulic power provided by the hydraulic system 7. The data acquisition and control system 8 realizes the real-time acquisition, display, storage and playback of data and video of the detection system. The data acquisition and control system 8 includes an equipment-side operating console 9, a detection system control room 10 and a cross-regional command center 11, all of which are connected to the host computer (server), and the control interlocks between them, so that the detection system can be controlled at any place as needed.

[0040] like Figure 2As shown, the derrick 1 is composed of a mandrel installation assembly A1, a drilling beam A2, a drilling assembly A3, a transport device A4, a base A5, a derrick back steel frame A6, a derrick column A7 and a top support A8. The mandrel installation assembly A1 is installed on the outside of the derrick column A7, the top support A8 is installed on the upper side of the mandrel installation assembly A1, and the flange at the middle step of the derrick column A7 is installed on the lower side, that is, the mandrel installation cylinder flange is bolted and fixed to the flange III of the derrick column A705. The mandrel installation assembly A1 is used to clamp the test mandrel 2, and the test mandrel 2 is installed in the pressure device 5 to be tested, or the test mandrel 2 is taken out from the pressure device 5 to be tested. The upper part of the drilling beam A2 supports the rotating assembly 6, and the two sides of the drilling beam A2 are connected to the drilling assembly A3. The drilling beam A2 is provided with a guide wheel, so that the drilling beam A2 can move up and down along the guide plate of the derrick column A7. The drilling assembly A3 has a drilling cylinder A302, which is driven by the hydraulic power provided by the hydraulic system 7 to move up and down to simulate the drilling condition. The transport device A4 can move the elevated short section 3 and the pressure-carrying device 5 to be tested along the guide rail direction. When the transport device A4 moves to the position of the wellhead sensing block A402, the centers of the rotating assembly 6, the test mandrel 2 and the pressure-carrying device 5 to be tested coincide. When the transport device moves to the position of the clamping sensing block A401, the mandrel installation assembly A1 coincides with the center of the pressure-carrying device 5 to be tested. The guide rail assembly of the transport device A4 is fixed on the base A5, and the slider A405 of the guide rail assembly is connected to the bolts of the transport device A4 to provide a reaction force support for drilling and rotating drilling. The base A5 is fixed to the prefabricated foundation by anchor bolts A503 to provide load support for the detection system. The derrick back steel frame A6 connects the derrick columns A7 into a whole through positioning pins and bolts, which enhances the stability of the derrick columns A7. The derrick columns A7 are important supports for the derrick 1 and provide guide plates for the drilling beam A2, which can ensure that the drilling beam A2 moves up and down smoothly along the guide plates; the top support A8 connects the top of the derrick columns A7 into a whole to maintain structural stability.

[0041] like Figure 3As shown, the mandrel installation assembly A1 consists of the mandrel installation beam B1, the pin IA101, the mandrel installation cylinder A102, the bottom mounting seat A103, the guide shaft A104, the top mounting seat A105 and the locking nut IA106. The guide shaft A104 is assembled between the bottom mounting seat A103 and the top mounting seat A105 and fixed with the locking nut IA106. The guide seat in the mandrel installation beam B1 is installed on the guide shaft A104 and can slide up and down freely. The guide shaft A104 ensures the smooth up and down movement of the mandrel installation beam B1. The test mandrel 2 is hoisted into the mandrel mounting beam B1 and locked. The mandrel mounting beam B1 is connected to the mandrel mounting cylinder A102 through the pin IA101. The mandrel mounting cylinder A102 extends out and moves the mandrel mounting beam B1 and the test mandrel 2 along the guide shaft A104 to an appropriate height. When the transfer device A4 moves to the clamping sensing block A401, the mandrel mounting cylinder A102 retracts and presses down with the mandrel mounting beam B1, pressing the test mandrel 2 into the predetermined height in the pressure-bearing operating device 5 to complete the clamping.

[0042] like Figure 4 As shown, the mandrel mounting crossbeam B1 is composed of an ear seat B101, a welding assembly B102, a guide seat C1, a clamping cylinder B103, a locking block B104, a pin II B105, and a bearing device B106. The ear seat B101 is connected to the mandrel mounting cylinder A102 through a pin I A101. The ear seat B101, the guide seat C1, and the bearing device B106 are all installed on the welding assembly B102, and the welding assembly B102 provides mechanical support for the two ear seats B101, the two guide seats C1, and the bearing device B106. The pin shaft Ⅱ B105 connects the clamping cylinder B103 and the locking block B104 into a whole. When the test mandrel 2 is installed in place along the guide surface of the load-bearing device B106, the piston rods of the two clamping cylinders B103 extend out, and drive the locking block B104 through the pin shaft Ⅱ B105 to clamp the test mandrel 2 in the B106 load-bearing device. Under the action of the mandrel installation cylinder A102, the test mandrel 2 can be stably moved up and down as needed.

[0043] like Figure 5 As shown, the guide seat C1 is composed of a support seat I C101, a pressure plate C102, a bearing V C103, and a bearing seat C104. The support seat C101 is fixed to the core shaft mounting crossbeam B1 by bolts, and the bearing V C103 is installed in the inner cavity of the bearing seat C104. The pressure plate C102 is tightened by bolts to fix the bearing V C103 on the bearing seat C104. The guide seat C1 can slide up and down along the guide shaft A104 to maintain the stability of the core shaft mounting assembly A1.

[0044] like Figure 6As shown, the drilling beam A2 is composed of a guide wheel assembly D1, a beam welding assembly A201, a welding flange IA202, and a drilling cylinder double-ear seat A203. The guide wheel assembly is composed of 16 guide wheels, each of which is bolted to the beam welding assembly A201 to ensure that the drilling beam A2 can move up and down smoothly. The drilling cylinder double-ear seat A203 is installed on both sides of the beam welding assembly A201. The drilling cylinder double-ear seat A203 is used to connect the drilling cylinder. The welding flange IA202 is installed on the beam welding assembly A201. The welding flange IA202 is used to install and fix the rotating assembly 6.

[0045] like Figure 7 As shown, the guide wheel assembly D1 is composed of a guide wheel D101, a locking nut II D102, a shaft D103, a support seat II D104, a bearing IV D105, and a spacer D106. The bearing IV D105 is assembled to the inner cavity of the guide wheel D101 to form a guide wheel assembly. The shaft D103 is passed through one side of the support seat II D104, and then the spacer D106 and the guide wheel assembly are assembled in sequence. Then the locking nut II D102 is installed to the other end of the shaft D103 and locked. The guide wheel D101 can then rotate freely around the axis D103.

[0046] like Figure 8 As shown, the drilling assembly A3 is composed of an adjustment subsection A301, a drilling cylinder A302 and a pin shaft III A303. The different lengths of the adjustment subsection A301 can adjust the initial height of the drilling beam A2 to adapt to the pressure working device 5 to be tested at different heights. The lower part of the adjustment subsection A301 is fixed to the base A5 with bolts. The drilling cylinder A302 and the adjustment subsection A301 are connected with bolts. The drilling cylinder piston rod ear plate and the drilling cylinder double ear seat A203 are assembled together with the pin shaft III A303. The drilling cylinder A302 is extended and retracted to drive the drilling beam A2 to move up and down.

[0047] like Fig. 9As shown, the transport device A4 is composed of a clamping sensing block A401, a wellhead sensing block A402, a locking plate A403, a translation cylinder A404, a slider A405, a pin shaft IV A406, a guide rail A407, a support seat III A408, a flange II A409, a locking ear plate I A410, a translation cylinder double-ear seat A411 and a positioning sensor A412. The clamping sensing block A401, the wellhead sensing block A402 and the guide rail A407 are all installed on the base A5, and the flange II A409, the locking ear plate I A410 and the translation cylinder double-ear seat A411 are welded on the support seat III A408 to form a transport module, and the transport module is connected to multiple sliders A405 of the guide rail A407 by bolts. One end of the translation cylinder A404 is connected to the translation cylinder double-ear seat A411 by a pin shaft IV A406, and the other end is installed on the translation cylinder mounting seat A505 of the base A5, and locked with a locking plate A403 and bolts; when the translation cylinder A404 drives the transfer device A4 to reach the position of the clamping sensing block A401 or the wellhead sensing block A402, the positioning sensor A412 will sense it and send a signal, and the translation cylinder A404 will stop moving, completing the transfer function.

[0048] like Fig.10 As shown, the base A5 is composed of a guide rail mounting seat A501, a base box A502, an anchor bolt A503, a positioning pin Ⅰ504, a translation cylinder mounting seat A505, a locking ear plate ⅡA506, a square flange ⅠA507 and a welding flange ⅡA508. The guide rail mounting seat 501, the translation cylinder mounting seat A505, the locking ear plate ⅡA506, the square flange ⅠA507 and the welding flange ⅡA508 are installed on the base box A502, and the positioning pin ⅠA504 is installed on the square flange ⅠA507. The base A5 is fixed with prefabricated anchor bolts A503 to prevent the detection system from overturning. The welding flange IA508 is used to fix the drilling cylinder A302 or the adjustment short section A301. The method flange IA507 and the positioning pin IA504 are installed in conjunction with the positioning holes of the derrick column to achieve precise positioning and ensure that the drilling beam A2 slides smoothly on the guide plate of the derrick column. The locking ear plate IA506 cooperates with the locking ear plate IA410 and the pin shaft to achieve safe load locking.

[0049] like Fig.11 As shown, the derrick back steel frame A6 is composed of a connecting plate IA601, a welded steel frame A602, and a positioning pin IA603. The connecting plate IA601 is installed on the welded steel frame A602, and the positioning pin IA603 is installed on the connecting plate IA601. The four positioning pins IA603 of the derrick back steel frame A6 cooperate with the positioning holes of the derrick column A7 to realize the rapid assembly of the derrick back steel frame A6 and the derrick column A7. The connecting plate IA601 of the derrick back steel frame A6 and the connecting plate IA707 of the derrick column A7 are fixed into a whole with bolts to keep the derrick structure stable.

[0050] like Fig.12 As shown, the derrick column A7 is composed of a left column A701, a cylinder fixing card A702, a cylinder fixing seat A703, a flange Ⅱ704, a flange ⅢA705, a right column A706, a connecting plate ⅡA707, a flange ⅢA708, a positioning pin ⅢA709, and a guide plate A710. The left column A701 and the right column A706 are the load-bearing bodies of the derrick. Two flanges III A705 and cylinder fixing cards A702 are respectively arranged on the left and right columns for fixing the mandrel installation cylinder A102; cylinder fixing seats A703 are symmetrically arranged on the left column A701 and the right column A706 for fixing the drilling cylinder A302; four square flanges III 708 and four locating pins III A709 are designed on the upper end faces of the left column A701 and the right column A706. The locating pins III 709 are installed on the square flanges III 708 for cooperating with the top support locating holes to realize the rapid installation of the top support; six square flanges II A704 are designed on the lower end faces of the left column 701 and the right column 706. The square flanges II A704 have locating holes and cooperate with the locating pins I A504 of the base A5 to realize the rapid installation of the derrick column A7. A guide plate A710 is also installed on the left column A701 and the right column A706, and the guide plate A710 ensures that the guide wheel assembly D1 slides up and down along the guide plate A710 stably and reliably.

[0051] like Fig.13 As shown, the top support A8 is composed of a support column A801, a flange IV A802, a top support beam A803, and a ladder and a handrail A804. The support column A801, the ladder and the handrail A804 are installed on the top of the top support beam A803, and the flange IV A802 is installed on the bottom. The support column A801 ​​is used to fix the top mounting seat A105, and the top support beam A803 is used to connect the left column A701 and the right column A706 together through the flange A802 to keep the derrick stable. The ladder and handrail A804 are convenient for later personnel to maintain the equipment.

[0052] like Fig.14 As shown, the test mandrel 2 is used to simulate a drill pipe, the test mandrel joint and the drill pipe joint have the same geometric dimensions, and the test mandrel 2 uses multiple short sections connected by threads. The test mandrel 2 is composed of a top short section 201, a short section I 202, a short section II 203, a short section III 204, a drill pipe joint I 205, a drill pipe joint II 206, and a bottom short section 207. The test mandrel 2 can be combined into various combinations required for testing by the top short section 201 and the bottom short section 207 in conjunction with other short sections and joints, such as a double joint combination, a single joint combination, a single joint dynamic pressure test shaft combination, etc.

[0053] like Fig.15As shown, the circulation throttling device 4 consists of a storage tank 401, a pump 402, a high-pressure pipeline A403, a high-pressure pipeline B404, a throttle valve 405, a low-pressure pipeline 406, a flow meter 407, an electric switch valve 408, a safety valve 409, a switch valve control cabinet 410, a sewage tank 411, an accumulator group 412, an electric pump 413 and an electric pump control cabinet 414. The pump 402 sucks clean water, or oil-based mud, or water-based mud from the reserve tank 401, and outputs high-pressure fluid through the pump 402. The high-pressure fluid enters the pressure-carrying device 5 to be tested through the high-pressure pipeline A403, and further enters the throttle valve 405 along the high-pressure pipeline B404 through the lifting short section 3. The pressure in the pressure-carrying device 5 to be tested can be adjusted by adjusting the throttle valve 405. After passing through the throttle valve 405, the fluid returns to the reserve tank 401 through the low-pressure pipeline 406 and the flow meter 407. This circulation loop realizes the simulation of drilling mud circulation and can also cool the pressure-carrying device to be tested. When performing the drilling and drilling detection task, the above-mentioned pump and throttle valve circuit are closed, and the button of the control cabinet of the electric pump 414 is operated. , start the electric pump 413 to pressurize the inner cavity of the pressurized working device 5 to be tested. When the inner cavity pressure of the pressurized working device 5 to be tested reaches the target value, operate the closing valve control cabinet 410 to open the electric switch valve 408 and connect it with the energy storage device group 412. This fluid circuit can ensure that the pressure fluctuation of the inner cavity of the pressurized working device 5 to be tested during drilling is less than 10%, which meets the standard requirements of the product to be tested; a safety valve 409 is configured in the drilling and drilling fluid supply circuit, that is, a safety valve 409 is installed on the pipeline behind the electric switch valve 408. When abnormally high pressure occurs under drilling and drilling conditions and exceeds the set value of the safety valve, the safety valve 409 automatically opens, and the fluid enters the sewage pool 411, thereby realizing the inherent safety of the detection system.

[0054] like Fig.16As shown, the rotating assembly 6 consists of a bracket 601, a bearing seal I602, a sealing cover 603, a transmission box 604, a key 605, a bearing seal II606, a center shaft 607, a flange IV608, a transmission key 609, an oil cup 610, a bearing III611, a bearing II612, a bearing I613, a locking screw sleeve 614, a speed torque sensor I615, a coupling 616, a locking screw 617 and a motor 618. The bracket 601 is fixed on the upper flange of the transmission box 604, and the motor 618 is installed on the upper end surface of the bracket 601 with bolts. The transmission box 604 is installed on the welding flange A202 of the drilling beam A2 with bolts, and the rotating assembly 6 and the drilling beam A2 are assembled. The motor 618 and the speed torque sensor I615 are connected together with the coupling 616 and the locking screw 617. The speed torque sensor I615 and the center shaft 607 use the key 605 to transmit the torque. The transmission key 609 is used to fix the center shaft 607 and the flange IV608 together. The rotation of the motor 618 will rotate with the speed torque sensor I615, the center shaft 607, and the flange IV608. Under the action of two layers of bearings II 612, the center shaft 607 can withstand both pressure and tension while rotating; bearings III 611 and bearings I 613 align and straighten the center shaft 607, and bearing seals I 602 and II 606 seal the four layers of bearings up and down to form a lubrication cavity, and grease is added through the oil cup 610.

[0055] like Fig.17 As shown, the hydraulic system 7 is powered by a dedicated transformer, and is equipped with a main motor soft starter and an auxiliary motor soft starter respectively; the main motor soft starter drives the main hydraulic pump to provide hydraulic power to the motor 618 and the drilling cylinder A302, respectively realizing rotation and drilling under the control system. The auxiliary motor soft starter drives the auxiliary hydraulic pump to provide hydraulic power to the translation cylinder A404, the clamping cylinder B103, and the mandrel installation cylinder A102, realizing the functions of telescopic movement of the transport device A4, mandrel clamping and mandrel installation. The hydraulic system 7 is also equipped with a hydraulic oil tank and a hydraulic cooling system to ensure the normal operation of the system.

[0056] like Fig.18As shown, the data acquisition and control system 8 is composed of a hydraulic system 7, a sensor detection device, a camera, a lower computer, a host computer, an equipment-side console 9, a detection system control room 10, and a cross-regional command center 11. The sensor detection device is composed of various required displacement, pressure, temperature, flow and force sensors. The sensor is counted into the junction box, and the signal is sent from the junction box to the lower computer with a multi-core cable to complete data acquisition. The data is further uploaded to the host computer (server). The required camera is configured according to the monitoring needs, and the camera network cable is connected to the router and then connected to the host computer; the host computer implements control interlocking for the received data and video at the equipment-side console 9, the detection system control room 10, and the cross-regional command center 11. The three places issue instructions to the lower computer through the upper computer to form a closed-loop control.

[0057] like Fig.19 As shown, the sensor detection device is composed of a positioning sensor A412, a liquid level sensor 801, an inlet pressure sensor 802, an outlet pressure sensor 803, a displacement sensor I 804, a displacement sensor II 805, a temperature sensor 806, a force sensor I 807, a speed torque sensor II 808, a displacement sensor III 809 and a force sensor II 810. The positioning sensor A412 is responsible for the movement and positioning of the transport device. The temperature sensor 806 is installed on the outside of the shell of the pressure-carrying device 5 to be tested, the liquid level sensor 801 detects the liquid level of the reserve tank 401, the inlet pressure sensor 802 and the outlet pressure sensor 803 detect the changes in the inlet and outlet pressures of the pressure-carrying device 5 to be tested; the displacement sensor I 804, the displacement sensor II 805, and the displacement sensor III 809 respectively monitor the real-time displacement data of the drilling cylinder A302, the core shaft installation cylinder A102, and the clamping cylinder B103, and provide data support for the synchronous closed-loop control of the cylinders. The force sensor I 807 and the force sensor II 810 are used to detect the force conditions of the test core shaft 2 respectively. The speed torque sensor II 808 provides real-time torque and speed data of simulated rotary drilling to realize simulated constant speed or constant torque drilling.

[0058] The present invention provides a working method of a detection system for a wellhead pressure operation device, comprising: When performing a rotational dynamic pressure test, follow these steps: The method comprises the steps of 1. installing a lifting short section 3; Step 2. Install the pressure-carrying device 5 to be tested onto the lifting short section 3; Step 3. Adjust the position of the transport device A4 so that the transport device A4 is at the position of the clamping sensing block A401, ensuring that the center of the pressure-carrying device 5 to be tested coincides with the center of the mandrel installation assembly A1; Step 4. Hoist the test mandrel 2 and clamp it with the clamping cylinder B103, and operate the mandrel installation cylinder A102 to press the test mandrel 2 into the pressure-carrying device 5 to be tested; Step 5. Operate the transport device A4 to move the installed pressure-operated device 5 to the wellhead, and then connect the lower flange of the rotating assembly to the flange of the test mandrel; Step 6. Close the high-pressure pipeline A403, close the high-pressure pipeline B404, and close the electric switch valve 408; Step 7. Use the electric pump 413 to pressurize the pressure-carrying device 5 to be tested to the test pressure, and reduce the pressure to zero after the static pressure test is completed; Step 8. Start the electric pump 413 again to pressurize the pressure-carrying device 5 to be tested to the target pressure value of the dynamic pressure test, start the hydraulic system 7, and operate the upper computer to start the rotating assembly motor to gradually increase the speed of the test mandrel 2 to the test target value; Step 9. After the pressurized operating device 5 to be tested completes the predetermined test time under the target pressure and target speed conditions, the pressure of the pressurized operating device 5 to be tested is reduced to zero, and the electric pump 413 is used to pressurize it again for a static pressure test. After the static pressure test is completed, the pressure drops to zero, and the rotational dynamic pressure test is completed.

[0059] When performing a trip test, follow these steps: Step 1. Complete the above-mentioned rotational dynamic pressure test steps 1 to 5, that is, complete the installation of the pressure-carrying working device 5 to be tested; Step 2. Close the high-pressure pipeline A403, close the high-pressure pipeline B404, start the electric pump 413 to pressurize to the target pressure value, open the electric switch valve 408, ensure that the pressure-carrying device 5 to be tested is connected with the energy storage group 412, and use the electric pump 413 to pressurize to the target value of the tripping test again; Step 3. Start the hydraulic system 7, operate the upper computer to control the stroke and speed of the drilling cylinder A302, gradually adjust the stroke and speed of the drilling cylinder A302 to the test target value, and start counting the number of joints passed by the drilling; Step 4. When the number of tripping joints reaches a predetermined target value, the test is terminated, the electric switch valve 408 is closed, and the pressure of the pressure-carrying device 5 to be tested is reduced to zero to complete the test.

[0060] When conducting simulated drilling inspections, include: Step 1. Complete the above-mentioned rotational dynamic pressure test steps 1 to 5, that is, complete the installation of the pressure-carrying working device 5 to be tested; Step 2. Open the high-pressure pipeline A403, open the high-pressure pipeline B404, keep the throttle valve 405 fully open, and close the electric switch valve 408; Step 3. Start the hydraulic system 7, operate the upper computer to control the rotating assembly 6 so that the motor drives the test mandrel 2 to rotate, and control the drilling cylinder A302 so that the test mandrel 2 can move up and down; after completing the above operations, the test mandrel 2 can also realize rotary drilling while moving up and down; Step 4. Start the pump 402, and the circulating fluid enters the pressure-carrying device 5 to be tested through the high-pressure pipeline A403, flows back to the high-pressure pipeline A403 through the pressure-carrying device 5 to be tested, and returns to the reserve tank 401 of the pump 402 after passing through the throttle valve 405. Adjust the opening of the throttle valve 405 to achieve the drilling target pressure; Step 5. After completing the above operations, complete the simulation of drilling pressure, rotation speed and drilling speed conditions, and complete the test after reaching the predetermined test time.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection system for a wellhead pressure operation device, characterized in that: The detection system consists of a derrick, a test mandrel, a lifting short section, a circulation throttling device, a pressure-carrying device to be tested, a rotating assembly, a hydraulic system and a data acquisition and control system. The rotating assembly, the test mandrel, the pressure-carrying device to be tested and the lifting short section are all installed on the derrick. The upper part of the test mandrel is connected to the lower flange of the rotating assembly by bolts, the lower flange of the lifting short section is connected to the blind plate flange, the upper flange of the lifting short section is connected to the pressure-carrying device to be tested, the circulation throttling device and the pressure-carrying device to be tested form a circulation channel, the rotating assembly drives the test mandrel to rotate under the hydraulic power provided by the hydraulic system, and the data acquisition and control system realizes real-time acquisition, display, storage and playback of data and video of the detection system.

2. The system according to claim 1, characterized in that The derrick is composed of a mandrel installation assembly, a drilling beam, a drilling assembly, a transport device, a base, a derrick back steel frame, a derrick column and a top support. The mandrel installation assembly is installed on the outside of the derrick column. The top support is installed on the upper side of the mandrel installation assembly, and the lower side is installed on the middle step flange of the derrick column. The upper part of the drilling beam supports the rotating assembly. Both sides of the drilling beam are connected to the drilling assembly. The drilling beam is provided with a guide wheel so that the drilling beam can move up and down along the guide plate of the derrick column. The drilling assembly has a drilling cylinder. The transport device can move the lifting nipple and the pressurized working device to be tested along the guide rail direction. When the transport device moves to the wellhead sensing block position, the centers of the rotating assembly, the test mandrel and the pressurized working device to be tested coincide with each other. When the transport device moves to the clamping sensing block position, the mandrel installation assembly coincides with the center of the pressurized working device to be tested. The guide rail of the transport device is fixed on the base, the slider of the guide rail is connected to the bolt of the transport device, the base is fixed to the prefabricated foundation by anchor bolts, the derrick back steel frame connects the derrick columns into a whole through positioning pins and bolts, and the top support connects the top of the derrick columns into a whole.

3. The system according to claim 2, characterized in that The mandrel installation assembly consists of a mandrel installation beam, a pin shaft I, a mandrel installation cylinder, a bottom mounting seat, a guide shaft, a top mounting seat and a locking nut I. The guide shaft is assembled between the bottom mounting seat and the top mounting seat and fixed with a locking nut I. The guide seat in the mandrel installation beam is installed on the guide shaft and can slide up and down freely. The test mandrel is hoisted into the mandrel installation beam and locked. The mandrel installation beam is connected to the mandrel installation cylinder through the pin shaft I. The mandrel installation cylinder extends out and moves the mandrel installation beam and the test mandrel along the guide shaft to an appropriate height. When the transfer device moves to the clamping sensing block, the mandrel installation cylinder retracts and presses down the mandrel installation beam, pressing the test mandrel into the predetermined height in the pressure-bearing operating device to be tested, and completing the clamping.

4. The system according to claim 3, characterized in that The mandrel mounting crossbeam is composed of an ear seat, a welding assembly, a guide seat, a clamping cylinder, a locking block, a pin shaft II and a bearing device. The ear seat and the mandrel mounting cylinder are connected together through a pin shaft I. The ear seat, the guide seat and the bearing device are all installed on the welding assembly. The pin shaft II connects the clamping cylinder and the locking block into a whole. When the test pin shaft is installed in place along the guide surface of the bearing device, the piston rods of the two clamping cylinders extend out, and the locking block is driven by the pin shaft II to clamp the test mandrel in the bearing device. Under the action of the clamping cylinder, the test mandrel moves up and down stably as needed.

5. The system according to claim 2, characterized in that The transport device is composed of a clamping sensing block, a wellhead sensing block, a locking plate, a translation cylinder, a slider, a pin shaft IV, a guide rail, a support seat III, a flange II, a locking ear plate I, a translation cylinder double-ear seat and a positioning sensor. The clamping sensing block, the wellhead sensing block and the guide rail are all installed on the base. The flange II, the locking ear plate I and the translation cylinder double-ear seat are welded to the support seat III to form a transport module. The transport module is connected to multiple sliders of the guide rail by bolts. One end of the translation cylinder is connected to the translation cylinder double-ear seat by a pin shaft VI, and the other end is installed on the translation cylinder mounting seat of the base and locked by a locking plate and bolts. When the translation cylinder drives the transport device to reach the position of the clamping sensing block or the wellhead sensing block, the positioning sensor will sense it and send a signal, and the translation cylinder stops moving to complete the transport function.

6. The system according to claim 2, characterized in that The base is composed of a guide rail mounting seat, a base box, anchor bolts, a locating pin Ⅰ, a translation cylinder mounting seat, a locking ear plate Ⅱ, a square flange Ⅰ and a welding flange Ⅱ. The guide rail mounting seat, the translation cylinder mounting seat, the locking ear plate Ⅱ, the square flange Ⅰ and the welding flange Ⅱ are welded to the base box. The locating pin Ⅰ is installed on the square flange Ⅰ. The base is fixed with prefabricated anchor bolts. The welding flange Ⅱ is used to fix the drilling cylinder or adjust the short section. The square flange Ⅰ and the locating pin Ⅰ are installed in conjunction with the locating hole of the derrick column. The locking ear plate Ⅱ cooperates with the locking ear plate Ⅰ and the pin shaft.

7. The system according to claim 1, characterized in that The circulation throttling device is composed of a storage tank, a pump, a high-pressure pipeline A, a high-pressure pipeline B, a throttle valve, a low-pressure pipeline, a flow meter, an electric switch valve, a safety valve, a switch valve control cabinet, a sewage tank, an accumulator group, an electric pump and an electric pump control cabinet. The pump sucks clean water, or oil-based mud, or water-based mud from the storage tank and outputs high-pressure fluid through the pump. The high-pressure fluid enters the pressure-carrying working device to be tested through the high-pressure pipeline A, passes through the rising short section and enters the throttle valve along the high-pressure pipeline B. The pressure in the pressure-carrying working device to be tested is adjustable by adjusting the throttle valve. After the throttle valve, the fluid passes through the low-pressure pipeline and the flow meter and then returns to the storage tank; When performing the drilling inspection task, close the pump and throttle valve circuit, operate the button of the electric pump control cabinet, start the electric pump to pressurize the inner cavity of the pressurized working device to be tested, and when the pressure in the inner cavity of the pressurized working device to be tested reaches the target value, operate the closing valve control cabinet to open the electric switch valve and connect it to the energy storage device group. A safety valve is configured in the drilling fluid supply circuit. When abnormally high pressure occurs under the drilling condition and exceeds the safety valve setting value, the safety valve automatically opens and the fluid enters the sewage pool.

8. The system according to claim 1, characterized in that The data acquisition and control system consists of a hydraulic system, a sensor detection device, a camera, a lower computer, a host computer, an equipment-side operating table, a detection system control room, and a cross-regional command center. The sensor detection device consists of various required displacement, pressure, temperature, flow and force sensors. The sensor is connected to the junction box, and the signal is sent from the junction box to the lower computer with a multi-core cable to complete data acquisition. The data is further uploaded to the host computer. The required camera is configured according to monitoring needs. The camera network cable is connected to the router and then connected to the host computer. The host computer will receive the data and video at the equipment-side operating table, the detection system control room, and the cross-regional command center. Control interlocking is implemented in three places. Any one of them can issue instructions to the lower computer through the upper computer to form a closed-loop control.

9. The system according to claim 8, characterized in that The sensor detection device is composed of a liquid level sensor, an inlet pressure sensor, an outlet pressure sensor, a displacement sensor I, a displacement sensor II, a temperature sensor, a force sensor I, a speed torque sensor II, a displacement sensor III and a force sensor II. The temperature sensor is installed on the outside of the shell of the pressure device to be tested, the liquid level sensor is installed on the reserve tank, the inlet pressure sensor and the outlet pressure sensor are respectively installed at the outlet and the inlet of the pressure working device to be tested, the displacement sensor I, the displacement sensor II and the displacement sensor III are respectively installed on the drilling cylinder, the core shaft installation cylinder and the clamping cylinder, the force sensor I and the force sensor II are installed on the end of the test core shaft, and the speed torque sensor II is installed on the rotating assembly.

10. A working method of a wellhead pressure operation device detection system, characterized in that: include: When performing a rotational dynamic pressure test, follow these steps: Step 1. Install the lifting nipple; Step 2. Install the pressure-carrying device to be tested onto the lifting nipple; Step 3. Adjust the position of the transport device so that the transport device is at the position where the sensing block is clamped, ensuring that the center of the pressure-carrying device to be tested coincides with the center of the mandrel installation assembly; Step 4. Lift the test mandrel and clamp it with the clamping cylinder, and operate the mandrel installation cylinder to press the test mandrel into the pressure-carrying device to be tested; Step 5. Operate the transport device to move the installed pressure-operated device to be tested to the wellhead, and then connect the lower flange of the rotating assembly to the flange of the test mandrel; Step 6. Close high-pressure pipeline A, close high-pressure pipeline B, and close the electric switch valve; Step 7. Use an electric pump to pressurize the pressure-carrying device to be tested to the test pressure, and reduce the pressure to zero after completing the static pressure test; Step 8. Start the electric pump again to pressurize the pressure-carrying device to be tested to the target value of the dynamic pressure test pressure, start the hydraulic system, and operate the upper computer to start the rotating assembly motor to gradually increase the test mandrel speed to the test target value; Step 9. After the pressure-carrying device to be tested completes the predetermined test time under the target pressure and target speed conditions, the pressure of the pressure-carrying device to be tested is reduced to zero, and the electric pump is used to pressurize the device again for a static pressure test. After the static pressure test is completed, the pressure is reduced to zero, and the rotational dynamic pressure test is completed; When performing a trip test, follow these steps: Step 1. Complete the above-mentioned rotational dynamic pressure test steps 1 to 5, that is, complete the installation of the pressure-carrying working device to be tested; Step 2. Close high-pressure pipeline A, close high-pressure pipeline B, start the electric pump to pressurize to the target pressure value, open the electric switch valve, ensure that the pressure-carrying device to be tested is connected to the energy storage device, and use the electric pump to pressurize to the target value of the tripping test again; Step 3. Start the hydraulic system, operate the upper computer to control the stroke and speed of the drilling cylinder, gradually adjust the stroke and speed of the drilling cylinder to the test target value, and start counting the number of joints passed by the drilling; Step 4. When the number of tripping joints reaches the predetermined target value, the test is terminated, the electric switch valve is closed, and the pressure of the pressurized working device to be tested is reduced to zero to complete the test; When conducting a simulated drilling test, the following steps are included: Step 1. Complete the above-mentioned rotational dynamic pressure test steps 1 to 5, that is, complete the installation of the pressure-carrying working device to be tested; Step 2. Open high-pressure pipeline A, open high-pressure pipeline B, keep the throttle valve fully open, and close the electric switch valve; Step 3. Start the hydraulic system, operate the upper computer to control the rotating assembly so that the motor drives the test mandrel to rotate, and control the tripping cylinder so that the test mandrel can move up and down; after completing the above operations, the test mandrel can also realize rotary drilling while moving up and down; Step 4. Start the pump, and the circulating fluid enters the pressure-carrying device to be tested through the high-pressure pipeline A, flows back to the high-pressure pipeline A through the pressure-carrying device to be tested, and returns to the pump reserve tank after passing through the throttle valve. The throttle valve opening is adjusted to achieve the drilling target pressure; Step 5. After completing the above operations, complete the simulation of drilling pressure, rotation speed, and drilling speed conditions, and complete the test after reaching the predetermined test time.

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