An electric intelligent control plug-in adapter

Abstract

This invention provides an electrically powered intelligent control plug-in device, including a plug-in connector and an electric hydraulic control system. The plug-in connector includes a plug-in body and a lower plug-in connector. The plug-in body includes a housing and an outer cylinder, with the outer cylinder slidably fitted onto the outside of the housing. An upper oil chamber and a lower oil chamber are formed between the outer cylinder and the housing, and the upper and lower oil chambers are respectively provided with an upper hydraulic control pipe and a lower hydraulic control pipe. The electric hydraulic control system is connected to the upper and lower hydraulic control pipes to supply hydraulic pressure to the upper and lower oil chambers. A slip is provided in the middle of the housing; when the outer cylinder slides down to the slip body, the outer cylinder presses the slip body to connect the lower plug-in connector to the plug-in body. The advantages of this invention are: it can be installed in frequently disassembled parts of the wellhead; it adopts electric remote control and hydraulic drive, enabling rapid opening and connection; it realizes remote wellhead alignment connection of the blowout preventer string; and it is equipped with a video display system, allowing for remote pressure relief and safe operation.

Description

Technical Field

[0001] This invention relates to the field of coiled tubing operation technology, and more specifically, to an electrically powered intelligent control plug-in device. Background Technology

[0002] With the increase in horizontal wells for shale gas and tight gas, the application of coiled tubing fracturing and perforation operations has also increased. During these operations, the connection between the coiled tubing blowout preventer and the wellhead Christmas tree requires personnel to install and dismantle it at height. If multiple tool strings need to be replaced during the operation, multiple installations and dismantlings at height will be necessary. High-altitude connections require close coordination between the crane and the installation personnel; improper coordination can easily lead to safety accidents. Wellheads are high-pressure areas, posing certain potential safety risks to personnel during operation; the frequent high-altitude work also presents significant safety risks.

[0003] The current solution is to use a plug-in connector to address the above issues. This connector is installed at frequently disassembled parts of the wellhead (e.g., between the blowout preventer pipe and the blowout preventer), and is hydraulically driven for quick opening and connection. This enables remote wellhead alignment of the blowout preventer string, replacing the traditional manual union connection method.

[0004] The hydraulic control system of the inserter / puller is separately configured. The person in the coiled tubing control room is usually responsible for operating this type of equipment, but they cannot leave the control room, so another person has to be assigned to operate it. At night or in the rain, wellhead alignment is difficult, and it is hard to observe and confirm that the inserter / puller and locking are in place.

[0005] Manual depressurization at the wellhead typically involves manually climbing up the wellhead and turning the stopcock valve on the side of the blowout preventer. This process is loud and can be frightening, posing a safety hazard. Summary of the Invention

[0006] The purpose of this invention is to address at least one of the aforementioned deficiencies in the prior art. For example, one objective of this invention is to provide an electrically powered intelligent control plug-in device, installed at a frequently disassembled part of the wellhead, employing electric remote control and hydraulic drive for rapid opening and connection, enabling remote wellhead alignment and connection of the blowout preventer string; it is also equipped with a video display system for real-time monitoring of the plug-in status and assistance in plug-in operations; and it allows for remote pressure relief, ensuring safe operation.

[0007] To achieve the above objectives, the present invention provides an electrically powered intelligent control plug-in device for operating the disconnection and connection of a coiled tubing blowout preventer and a wellhead Christmas tree, comprising a plug-in connector and an electric hydraulic control system; the plug-in connector comprises a plug-in device body and a plug-in lower connector; the plug-in device body is connected to the lower end of the coiled tubing blowout preventer, and the plug-in lower connector is connected to the wellhead Christmas tree.

[0008] The inserter body includes a housing and an outer cylinder. The outer cylinder is slidably fitted onto the outside of the housing. An upper oil chamber and a lower oil chamber are formed between the outer cylinder and the housing. The upper oil chamber and the lower oil chamber are respectively provided with an upper hydraulic control pipe and a lower hydraulic control pipe. An electric hydraulic control system is connected to the upper hydraulic control pipe and the lower hydraulic control pipe respectively to supply hydraulic pressure to the upper oil chamber and the lower oil chamber. When the hydraulic pressure in the lower oil chamber is greater than that in the upper oil chamber, the outer cylinder can slide upward under hydraulic drive, and vice versa. A slip is provided in the middle of the housing. The slip includes a slip body fitted onto the outside of the housing. Multiple elastic connectors are provided on the inner side of the slip body. The elastic connectors are inserted into the housing and connected to male locking teeth. A female locking tooth is provided at the top of the inserter lower connector. When the outer cylinder slides down to the slip body, the outer cylinder presses the slip body to make the male locking tooth insert into the female locking tooth, thereby realizing the connection between the inserter lower connector and the inserter body.

[0009] In a preferred embodiment of this solution, the electric hydraulic control system includes a hydraulic oil tank, an oil supply line, an oil return line, and a reversing valve; a pneumatic hydraulic pump is provided on the oil supply line; the input end of the oil supply line and the output end of the oil return line are respectively connected to the outlet and return port of the hydraulic oil tank; the upper hydraulic control pipe and the lower hydraulic control pipe are connected to the output end of the oil supply line and the input end of the oil return line through the reversing valve.

[0010] In a preferred embodiment of this solution, the hydraulic oil tank is provided with an oil suction filter and an oil return filter at its outlet and return port, respectively.

[0011] In a preferred embodiment of this solution, the lower connector is further provided with a pressure relief port in the middle, and a hydraulic plug valve is provided at the pressure relief port to control the opening and closing of the pressure relief port; the oil supply line output end is connected to branch line one and branch line two in parallel, and the oil return line input end is connected to branch line three and branch line four in parallel; the upper hydraulic control pipe and the lower hydraulic control pipe are connected to branch line one and branch line three through reversing valve one; the electric hydraulic control system also includes reversing valve two, and branch line two and branch line four are connected to the two ports of the hydraulic plug valve through reversing valve two, so as to drive the hydraulic plug valve to open and close by a pneumatic hydraulic pump.

[0012] In a preferred embodiment of this solution, the electric intelligent control plug-in device further includes an intelligent control display system; the intelligent control display system includes a control panel, a control system is provided in the control panel, and a display screen is provided on the control panel; the hydraulic plug valve is electrically connected to the control system.

[0013] In a preferred embodiment of this solution, both the first reversing valve and the second reversing valve are three-position four-way valves, and both the first reversing valve and the second reversing valve are electrically connected to the control system.

[0014] In a preferred embodiment of this solution, a pneumatic control valve is provided at the front end of the oil supply line between the pneumatic hydraulic pump and the hydraulic oil tank, and the pneumatic control valve is electrically connected to the control system.

[0015] In a preferred embodiment of this solution, the first reversing valve, the second reversing valve, and the pneumatic manual control valve are all control valves that can be operated by both electric and manual means.

[0016] In a preferred embodiment of this solution, a proportional pressure reducing valve and a sensor for detecting pressure and transmitting the detected pressure value to the control system are provided on the oil supply line, located behind the pneumatic hydraulic pump; the proportional pressure reducing valve and the sensor are electrically connected to the control system. The pressure of the hydraulic control system can be adjusted through the proportional pressure reducing valve.

[0017] In a preferred embodiment of this solution, the hydraulic oil tank is equipped with a level gauge and an electronic level gauge for monitoring the liquid level; the electronic level gauge is electrically connected to the control system.

[0018] In a preferred embodiment of this solution, one end of the oil supply line is also connected to a pressure relief line, and the other end of the pressure relief line is connected to the return oil line and branch line two. The pressure relief line is equipped with a pressure relief valve and a safety valve; the pressure relief valve and the safety valve are electrically connected to the control system. The pressure relief valve enables electric pressure relief, releasing system pressure. If the pressure exceeds the set pressure of the safety valve, overflow will occur, ensuring that the system hydraulic pressure does not exceed the limit value.

[0019] In a preferred embodiment of this solution, the air circuit interface of the pneumatic hydraulic pump is connected to an air source via an air pipe; an electric pneumatic control valve is provided on the air pipe to control the opening and closing of the air pipe; the electric pneumatic control valve is electrically connected to the control system to facilitate remote control of the opening and closing of the air circuit.

[0020] In a preferred embodiment of this solution, the oil supply line is also connected to one end of a backup line, the other end of which is connected to a hydraulic oil tank; the backup line is equipped with a check valve and a hand pump. By manually pressing the hand pump head, hydraulic pressure is provided, which can control the plug-in switch.

[0021] In a preferred embodiment of this solution, the coiled tubing blowout preventer includes two plug-in connectors connected to the same wellhead tree; the plug-in body can be hoisted by a crane to either of the two plug-in connectors and connected to them in a corresponding position.

[0022] In a preferred embodiment of this solution, a video monitoring device is provided at the docking point of the plug-in device, and the crane's operator's cab is equipped with a wireless video receiver. Both the video monitoring device and the wireless video receiver are electrically connected to the control system. The control panel also includes a "gas source control" knob, a "system pressure adjustment" knob, a "hydraulic system pressure relief" knob, a "plug-in device switch" knob, and a "well pressure release" knob. The "gas source control" knob controls the opening and closing of the pneumatic hydraulic pump; the "system pressure adjustment" knob adjusts the proportional pressure reducing valve; the hydraulic system pressure relief knob controls the opening and closing of the pressure relief valve; the "plug-in device switch" knob controls the first reversing valve, thereby controlling the upward and downward sliding of the outer cylinder; and the "well pressure release" knob controls the second reversing valve, thereby controlling the opening and closing of the hydraulic plug valve.

[0023] In a preferred embodiment of this solution, the electric hydraulic control system further includes an electrical control box to provide power to each component. The electrical control box, hydraulic oil tank, pneumatic hydraulic pump, hand pump, and each control valve group are all mounted on a skid.

[0024] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0025] (1) This invention provides an electrically powered intelligent control plug-in device, installed at a frequently disassembled part of the wellhead (e.g., between the blowout preventer pipe and the blowout preventer), employing electric remote control and hydraulic drive to quickly open and connect, achieving remote wellhead alignment and connection of the blowout preventer string. Specifically:

[0026] The electric intelligent control plug-in device includes a plug-in connector, an intelligent control display system, and an electric hydraulic control system. The plug-in connector includes a plug-in body connected to the lower end of the coiled tubing blowout preventer and a plug-in lower connector connected to the wellhead tree. The plug-in body and the plug-in lower connector are locked together by slips. The slips body is fitted onto the housing of the plug-in body. The slips body has an outer cylinder with a hydraulic cylinder structure. The downward sliding of the outer cylinder structure presses the slips body to lock the plug-in lower connector.

[0027] The outer cylinder of the hydraulic cylinder structure is hydraulically driven by an electric hydraulic control system. The electric hydraulic control system includes a hydraulic oil tank, which provides hydraulic pressure to the outer cylinder through an oil supply line, and realizes the switching of the upper and lower sliding of the outer cylinder through the switching adjustment of a three-position four-way valve (reversing valve one).

[0028] In this solution, the intelligent control display system is combined with the electric hydraulic control system to achieve electric remote control. It can be quickly opened and connected by turning the "plug switch" knob on the control panel.

[0029] (2) The intelligent control display system is also equipped with a video display system, which can monitor the plugging and unplugging status in real time and assist in plugging and unplugging operations;

[0030] (3) Configure remote pressure relief, allowing remote control of the hydraulic plug valve on / off via the control panel to relieve pressure. This ensures safe operation. Specifically:

[0031] A hydraulic plug valve is provided at the plug-in connector. The electric hydraulic control system also includes a second directional valve for controlling the opening and closing of the hydraulic plug valve. The second directional valve is connected in parallel to the oil supply line via a branch line. During operation, the opening and closing of the hydraulic plug valve can be controlled by the "well pressure release" knob to release the well pressure. Attached Figure Description

[0032] The above and other objects and / or features of the present invention will become clearer from the following description taken in conjunction with the accompanying drawings, in which:

[0033] Figure 1 A schematic diagram of the wellhead installation of an electrically powered intelligent control plug-in connector, an exemplary embodiment of the electrically powered intelligent control plug-in device of the present invention, is shown.

[0034] Figure 2 A schematic diagram of a plug-in connector structure is shown, illustrating another exemplary embodiment of an electrically powered intelligent control plug-in device according to the present invention.

[0035] Figure 3 A schematic diagram of an electric hydraulic control system structure of an exemplary embodiment of an electric intelligent control plug-in device of the present invention is shown.

[0036] Figure 4 A schematic diagram of an electric hydraulic control system is shown, illustrating another exemplary embodiment of an electric intelligent control plug-in device according to the present invention.

[0037] Figure 5 A schematic diagram of the control panel and display screen of another exemplary embodiment of an electrically powered intelligent control plug-in device of the present invention is shown.

[0038] Key reference numerals in the attached drawings: 1. Lifting joint; 2. Housing; 3. Limiting ring; 4. Indexing ring; 5. Outer cylinder; 6. Slip; 7. Guide head; 8. Hydraulic plug valve; 9. Lower plug-in connector; 10. Indicator plate; 11. Position sensor; 12. Lower hydraulic control pipe; 13. Upper hydraulic control pipe; 14. Well pressure locking valve; 101. Electrical control box; 102. Check valve; 103. Hydraulic oil tank; 104. 105. Pneumatic hydraulic pump; 106. Electric pneumatic control valve; 107. Hand pump; 108. Directional control valve one; 109. Directional control valve two; 110. Pneumatic hand control valve; 111. Proportional pressure reducing valve; 112. Sensor; 113. Pressure relief valve; 114. Safety valve; a. Oil supply line; b. Oil return line; c. Branch line one; d. Branch line two; e. Branch line three; f. Branch line four; g. Spare line; h. Pressure relief line. Detailed Implementation

[0039] In the following description, an electrically powered intelligent control plug-in device of the present invention will be explained in detail with reference to exemplary embodiments.

[0040] It should be noted that terms such as "first," "second," "third," and "fourth" are merely for ease of description and distinction, and should not be interpreted as indicating or implying relative importance. Terms such as "up," "down," "front," "back," "left," "right," "inner," and "outer" are merely for ease of description and to establish relative orientations or positional relationships, and do not indicate or imply that the component referred to must have that specific orientation or position.

[0041] Example

[0042] An electric intelligent control plug-in device mainly consists of a plug-in connector, an electric hydraulic system, and an intelligent control display system; wherein, the plug-in connector includes a plug-in device body and a plug-in lower connector 9.

[0043] During operation, the inserter body is connected to the lower end of the coiled tubing blowout preventer, and the inserter connector 9 is connected to the upper end of the wellhead Christmas tree. (See...) Figure 1 The electric hydraulic control system can be placed near the continuous tubing unit, approximately 30 meters from the wellhead. The intelligent control and display system is located in the coiled tubing control room, with all components connected by cables and hydraulic lines. The intelligent control and display system is operated from the coiled tubing control room to control the opening and closing of the slips 6 of the inserter, and a crane is used to operate the disconnection and connection of the inserter. No personnel are required to go to the wellhead tree for connection operations. Specifically:

[0044] See Figure 3 As shown, in this solution, the plug-in / plug body includes a housing 2 and an outer cylinder 5. The outer cylinder 5 is slidably fitted onto the outside of the housing 2. An upper oil chamber is formed between the upper part of the outer cylinder 5 and the housing 2, and a lower oil chamber is formed between the lower part of the outer cylinder 5 and the housing 2. The upper oil chamber and the lower oil chamber are respectively connected to an upper hydraulic control pipe and a lower hydraulic control pipe. The electric hydraulic control system is connected to the upper hydraulic control pipe and the lower hydraulic control pipe respectively to supply hydraulic pressure to the upper oil chamber and the lower oil chamber, thereby driving the outer cylinder 5 to slide up and down.

[0045] In this embodiment, a slip 6 is provided in the middle of the housing 2. The slip 6 includes a slip body sleeved on the outside of the housing 2. Multiple elastic connectors are provided on the inner side of the slip body. After the elastic connectors pass through the housing 2, they are connected to male locking teeth. The top of the plug-in lower connector 9 is provided with female locking teeth. When the outer cylinder 5 slides down to the slip body, the outer cylinder 5 presses the slip body to make the male locking teeth insert into the female slip teeth, thereby realizing the connection between the plug-in lower connector 9 and the plug-in device body. Then, the outer cylinder 5 is driven to slide down by the electric hydraulic control system, thereby realizing the connection between the plug-in device body and the plug-in lower connector 9.

[0046] See Figure 1As shown, optionally, in this scheme, the coiled tubing blowout preventer can be equipped with two plug-in lower connectors 9 connected to the same wellhead tree, and the plug-in device body can be hoisted to either of the two plug-in lower connectors 9 by a crane.

[0047] Further, see Figure 2 As shown, the electric hydraulic control system includes a hydraulic oil tank 103, an oil supply line a, an oil return line b, and a reversing valve 107. An oil suction filter and a return filter are respectively installed at the outlet and return port of the hydraulic oil tank 103. A pneumatic hydraulic pump 104 is installed on the oil supply line a. The input end of the oil supply line a and the output end of the oil return line b are respectively connected to the outlet and return port of the hydraulic oil tank 103. The upper hydraulic control pipe and the lower hydraulic control pipe are connected to the output end of the oil supply line a and the input end of the oil return line b through the reversing valve 107.

[0048] See Figure 2 , Figure 3 As shown, in this embodiment, a pressure relief port is provided in the middle of the plug-in lower connector 9, and a hydraulic plug valve 8 is provided at the pressure relief port to control the opening and closing of the pressure relief port; the output end of the oil supply line a is connected in parallel with branch line one c and branch line two d, and the input end of the oil return line b is connected in parallel with branch line three e and branch line four f. The upper hydraulic control pipe and the lower hydraulic control pipe are connected to branch line one c and branch line three e through the reversing valve one 107; that is, the two pipes of the reversing valve one 107 (three-position four-way valve) are respectively connected to the upper hydraulic control pipe and the lower hydraulic control pipe. By switching the working position of the reversing valve one 107, the upper hydraulic control pipe or the lower hydraulic control pipe can be selectively pressurized, or kept in the neutral position, and neither pipe is pressurized, so that the sliding direction of the outer cylinder 5 can be controlled.

[0049] In this embodiment, the electric hydraulic control system also includes a second directional valve 108. Branch 2d and branch 4f are connected to the two ports of the hydraulic plug valve 8 through the second directional valve 108, so as to drive the hydraulic plug valve 8 to open and close by the pneumatic hydraulic pump 104.

[0050] Furthermore, the intelligent control display system includes a control panel, which contains a control system and a display screen; the hydraulic plug valve 8 is electrically connected to the control system.

[0051] See Figure 2 As shown, in this embodiment, both the first reversing valve 107 and the second reversing valve 108 are three-position four-way valves, and both the first reversing valve 107 and the second reversing valve 108 are electrically connected to the control system; at the front end of the oil supply line a, between the pneumatic hydraulic pump 104 and the hydraulic oil tank 103, a pneumatic manual control valve 109 is also provided, which is electrically connected to the control system for remote electric or manual control of the opening and closing of the oil supply line a.

[0052] To facilitate the adjustment of the hydraulic control system pressure, in this embodiment, the oil supply line a is equipped with a proportional pressure reducing valve 110 and a sensor 111 that can detect the pressure and transmit the detected pressure value to the control system; the proportional pressure reducing valve 110 and the sensor 111 are electrically connected to the control system.

[0053] In this embodiment, the hydraulic oil tank 103 is equipped with a level gauge and an electronic level gauge for monitoring the liquid level; the electronic level gauge is electrically connected to the control system to transmit liquid level information to the control system, and the operator can view the liquid level information in real time on the display screen.

[0054] Furthermore, in this embodiment, the oil supply line a is connected to one end of the backup line g, and the other end of the backup line g is connected to the hydraulic oil tank 103; the backup line g is also equipped with a check valve 102 and a hand pump 106 for backup in case of power failure; the oil supply line a is also connected to one end of the pressure relief line h, and the other end of the pressure relief line h is connected to the return line b and the second branch line d; the pressure relief line h is equipped with a pressure relief valve 112 and a safety valve 113; the pressure relief valve 112 and the safety valve 113 are electrically connected to the control system to realize electric pressure relief, relieve system pressure, and ensure safety.

[0055] In this embodiment, the pneumatic hydraulic pump 104 is controlled to open and close via an air source. Specifically, the air circuit interface of the pneumatic hydraulic pump 104 is connected to an air source via an air pipe, and an electric pneumatic control valve 105 is installed on the air pipe to control the opening and closing of the air pipe. The electric pneumatic control valve 105 is electrically connected to the control system to facilitate remote control of the opening and closing of the air circuit. In addition, the pneumatic manual control valve 109, the first reversing valve 107, and the second reversing valve 108 are all dual-purpose electric and manual control valves, which can be remotely electric controlled or manually operated on-site.

[0056] refer to Figure 4 As shown, the electric hydraulic control system also includes an electrical control box 101 to provide power to various components. The electrical control box 101, hydraulic oil tank 103, pneumatic hydraulic pump 104, hand pump 106, and various control valve groups are all mounted on the skid.

[0057] In this embodiment, a video monitoring device is provided at the docking point of the plug-in device, and the crane's operating cab is equipped with a wireless video receiver. Both the video monitoring device and the wireless video receiver are electrically connected to the control system, and the plug-in status can be observed on both the display screen and the wireless video receiver.

[0058] See Figure 5As shown, the control panel also includes a "gas source control" knob, a "system pressure regulation" knob, a "hydraulic system pressure relief" knob, a "plug switch" knob, and a "well pressure release" knob. The "gas source control" knob controls the opening and closing of the pneumatic hydraulic pump 104; the "system pressure regulation" knob adjusts the proportional pressure reducing valve 110; the hydraulic system pressure relief knob controls the opening and closing of the pressure relief valve 112; the "plug switch" knob controls the first directional valve 107, thereby controlling the upward and downward sliding of the outer cylinder 5; and the "well pressure release" knob controls the second directional valve 108, thereby controlling the opening and closing of the hydraulic plug valve 8.

[0059] In a preferred embodiment, the plug-in connector body includes a lifting joint 1, a housing 2, a limiting ring 3, a rotation ring 4, an outer cylinder 5, a slip 6, a guide head 7, a lower hydraulic control pipe 12, an upper hydraulic control pipe 13, a well pressure locking valve 14, and two position sensors 11. The lower plug-in connector 9 has an indicator plate 10, and a pressure relief port is located on the right side of the lower plug-in connector 9, which also has a hydraulic stop valve 8. The two position sensors 11 are mounted on the guide head 7. One sensor senses the outer cylinder 5 of the plug-in connector; when the outer cylinder 5 descends to its final position, it contacts this position sensor 11, indicating "locked" in place. The other position sensor 11 senses the indicator plate 10. The specific structure of the plug-in connector is as follows... Figure 1 As shown, its structural principle can be found in the existing patent with publication number CN115711104A entitled "A Split Trapezoidal Locking Connector and Its Usage Method" and the existing patent with publication number CN220015097U entitled "Anti-misoperation Mechanical Locking Device and Anti-misoperation Operating System for Wellhead Plug-in Connector".

[0060] The operating principle of this invention:

[0061] The wellhead installation process is as follows:

[0062] During field operations, the plug-in connector is installed in two parts: the plug-in body connects to the lower end of the coiled tubing blowout preventer, and the plug-in lower connector connects to the upper end of the wellhead Christmas tree. (See...) Figure 1 .

[0063] Homework preparation process:

[0064] On the intelligent control display interface of the intelligent control system, the "Gas Source Control" button is turned to the "On" position; the "System Pressure Regulation" button is turned to 10-21MPa; the "Hydraulic System Pressure Relief" knob is in the "Pressure Holding" position; the "Well Pressure Release" knob is in the neutral position; and the "Plug-in Switch" knob is in the neutral position.

[0065] The plug-in / plug-out process is as follows:

[0066] With the slips 6 inside the main body in the open position, a crane is used to hoist the blowout preventer and align the inserter body with the lower connector. Once the inserter body is in place (guide head 7 and indicator plate 10 are in contact, and the indicator light on the positioning sensor 11 illuminates), the "inserter switch" on the intelligent control display interface is rotated to the "lock" position. The electro-hydraulic system controls the "outer cylinder 5" of the inserter to descend. As the "outer cylinder 5" descends, it squeezes the slips 6, causing them to move towards the center and clamp the outer wall of the "lower connector 9," achieving a locking effect. Visually, the yellow paint indicator ring on the upper part of the inserter is gradually obscured until it is completely covered. At this point, the locking positioning sensor illuminates, confirming that the locking is in place. Construction work can then begin. A well pressure locking valve 14 is also provided. In the presence of well pressure, the hydraulic circuit for opening the slips 6 is locked by the well pressure, preventing the outer cylinder 5 from opening and ensuring safety by preventing accidental operation.

[0067] The process of unlocking and disengaging the plug-in / plug-out device is as follows:

[0068] After the operation is completed, close the inlet valve, turn the "well pressure relief" knob to the "open" position to release the internal pressure of the tubing string, and the well pressure locking valve 14 will automatically open. Turn the "plug switch" knob to the "unlock" position, and the electric hydraulic control system will control the "outer cylinder 5" of the plug to move upward. After reaching the limit ring locking position, close the outer cylinder 5 once, and then reopen it a second time. You can visually observe that the yellow paint indicator ring on the upper part of the plug gradually leaks out. Under the action of the spring, the slip 6 is fully opened. Then pull out the plug body and turn the "hydraulic system pressure relief" knob to the "pressure relief" position to release the hydraulic system pressure.

[0069] Intelligent control display system principle:

[0070] The intelligent remote control system consists of a control panel, a display screen, and control circuitry. The control panel houses the control system, and both the control panel and display screen are located in the operator's room. The control circuitry is installed on the hydraulic control system and connected by control cables. This allows all operations of the connector to be performed from within the operator's room, and the on / off actions of the connector and the status of the positioning sensors can be observed on the display screen. The upper part of the display system has five physical knobs, with functions for: connector on / off, well pressure release, system pressure regulation, gas source control, and hydraulic system depressurization. These are operated by rotating left and right. The lower part is the display screen. The left side displays a video feed showing real-time video of the connector operation. A wireless video receiver is also included, allowing the crane operator to easily observe the connector status, adjust crane movements, and receive better assistance during low visibility conditions such as at night or in rainy weather. The right side displays a simulated animation of the connector's on / off action, providing the operator with a clear understanding of its status. The lower left side displays the connector status, including the positioning sensors and locking sensors. This accurately reflects the connector's docking status, facilitating the next step of the operation.

[0071] Locking position sensor:

[0072] Two positioning sensors 11 are mounted on the guide head 7. One sensor senses the outer cylinder 5 of the plug-in / plug-out device. When the outer cylinder 5 descends to its final position, it contacts this positioning sensor 11, indicating "locked" is in place. The other positioning sensor 11 senses the indicator plate 10. When the plug-in / plug-out device body is aligned with the lower connector, it contacts the other positioning sensor 11, indicating "plug-in / plug-out" is in place. These sensors reflect the execution result of the action, compensating for the inaccuracies of visual observation.

[0073] Video system:

[0074] The docking status of the plug-in device can be observed through video. The docking of the plug-in device is completed by a crane. The crane operation of the plug-in device docking is a relatively technical operation. The equipped wireless video receiver can be placed in the crane operator's cab, so that the crane operator can observe the docking status and make adjustments at any time. It is especially useful when working at night or in poor lighting conditions such as rain.

[0075] Pressure relief system:

[0076] A hydraulic plug valve 8 is installed at the lower flange of the inserter. The hydraulic plug valve 8 is connected to the electric hydraulic control system via hydraulic lines (supply line a and return line b). After the operation is completed, the wellhead pressure is shut off, and the pressure in the through-hole must be released before the inserter can be opened. During operation, turn the "Well Pressure Release" knob on the intelligent control display system to the "Open" position. The electric hydraulic control system can remotely open the plug valve. After the pressure is released, turn the "Well Pressure Release" knob to the "Close" position.

[0077] Although the present invention has been described above in conjunction with exemplary embodiments and accompanying drawings, those skilled in the art should understand that various modifications can be made to the above embodiments without departing from the spirit and scope of the claims.

Claims

1. An electrically powered intelligent control plug-in device for operating the disconnection and connection of the coiled tubing blowout preventer and the wellhead Christmas tree, characterized in that: Including pluggable connectors and electro-hydraulic control systems; The plug-in connector includes a plug-in body and a plug-in lower connector (9); The plug-in / plug body is connected to the lower end of the coiled tubing blowout preventer, and the plug-in / plug lower connector (9) is connected to the wellhead tree. The plug-in / plug body includes a housing (2) and an outer cylinder (5). The outer cylinder (5) is slidably fitted onto the outside of the housing (2). An upper oil chamber and a lower oil chamber are formed between the outer cylinder (5) and the housing (2). The upper oil chamber and the lower oil chamber are respectively provided with an upper hydraulic control tube and a lower hydraulic control tube. The electric hydraulic control system is connected to the upper hydraulic control pipe and the lower hydraulic control pipe respectively, so as to deliver hydraulic pressure to the upper oil chamber and the lower oil chamber respectively. When the hydraulic pressure in the lower oil chamber is greater than the hydraulic pressure in the upper oil chamber, the outer cylinder (5) can slide upward under hydraulic drive, and vice versa. The shell (2) is provided with a slip (6) in the middle. The slip (6) includes a slip body sleeved on the outside of the shell (2). Multiple elastic connectors are provided on the inner side of the slip body. After the elastic connectors are inserted into the shell (2), they are connected to male teeth. The top of the plug-in connector (9) is provided with a female locking tooth. When the outer cylinder (5) slides down to the slip body, the outer cylinder (5) presses the slip body so that the male locking tooth is inserted into the female locking tooth, thereby realizing the connection between the plug-in connector (9) and the plug-in body.

2. The electrically powered intelligent control plug-in device according to claim 1, characterized in that: The electric hydraulic control system includes a hydraulic oil tank (103), an oil supply line (a), an oil return line (b), and a reversing valve (107); A pneumatic hydraulic pump (104) is installed on the oil supply line (a); The oil supply line (a) input end and the oil return line (b) output end are respectively connected to the outlet and return port of the hydraulic oil tank (103); The upper hydraulic control pipe and the lower hydraulic control pipe are connected to the output end of the oil supply line (a) and the input end of the oil return line (b) through the reversing valve (107).

3. The electrically powered intelligent control plug-in device according to claim 2, characterized in that: The hydraulic oil tank (103) is equipped with an oil suction filter and an oil return filter at its outlet and return port, respectively.

4. The electrically powered intelligent control plug-in device according to claim 2, characterized in that: The plug-in connector (9) is also provided with a pressure discharge port in the middle, and a hydraulic plug valve (8) is provided at the pressure discharge port to control the opening and closing of the pressure discharge port; The oil supply line (a) has branch line 1 (c) and branch line 2 (d) connected in parallel at the output end, and the return line (b) has branch line 3 (e) and branch line 4 (f) connected in parallel at the input end. The upper hydraulic control pipe and the lower hydraulic control pipe are connected to branch line 1 (c) and branch line 3 (e) through the reversing valve 1 (107). The electric hydraulic control system also includes a second reversing valve (108). Branch two (d) and branch four (f) are connected to the two ports of the hydraulic plug valve (8) through the second reversing valve (108) so that the hydraulic plug valve (8) can be opened and closed by the pneumatic hydraulic pump (104).

5. The electrically powered intelligent control plug-in device according to claim 4, characterized in that: The electric intelligent control plug-in device also includes an intelligent control display system; The intelligent control display system includes a control panel, which contains a control system and a display screen. The hydraulic plug valve (8) is electrically connected to the control system.

6. The electrically powered intelligent control plug-in device according to claim 5, characterized in that: Both the first reversing valve (107) and the second reversing valve (108) are three-position four-way valves, and both the first reversing valve (107) and the second reversing valve (108) are electrically connected to the control system.

7. The electrically powered intelligent control plug-in device according to claim 6, characterized in that: At the front end of the oil supply line (a), a pneumatic control valve (109) is also provided between the pneumatic hydraulic pump (104) and the hydraulic oil tank (103), and the pneumatic control valve (109) is electrically connected to the control system.

8. The electrically powered intelligent control plug-in device according to claim 7, characterized in that: The first reversing valve (107), the second reversing valve (108), and the pneumatic manual control valve (109) are all control valves that can be operated by both electric and manual means.

9. The electrically powered intelligent control plug-in device according to claim 8, characterized in that: On the oil supply line (a), a proportional pressure reducing valve (110) is provided on the rear side of the pneumatic hydraulic pump (104), and a sensor (111) is provided for detecting pressure and transmitting the detected pressure value to the control system. The proportional pressure reducing valve (110) and the sensor (111) are electrically connected to the control system.

10. An electrically powered intelligent control plug-in device according to claim 8, characterized in that: The hydraulic oil tank (103) is equipped with a level gauge and an electronic level gauge for monitoring the liquid level; The electronic level gauge is electrically connected to the control system.

11. An electrically powered intelligent control plug-in device according to claim 8, characterized in that: The oil supply line (a) is also connected to one end of the pressure relief line (h), and the other end of the pressure relief line (h) is connected to the return oil line (b) and the second branch line (d); The pressure relief pipeline (h) is equipped with a pressure relief valve (112) and a safety valve (113); The pressure relief valve (112) and safety valve (113) are electrically connected to the control system.

12. The electrically powered intelligent control plug-in device according to claim 8, characterized in that: The pneumatic hydraulic pump (104) has an air supply via an air pipe at its air circuit interface. The air pipe is equipped with an electric air control valve (105) to control the opening and closing of the air pipe; The electric pneumatic control valve (105) is electrically connected to the control system to facilitate remote control of the opening and closing of the air circuit.

13. The electrically powered intelligent control plug-in device according to claim 8, characterized in that: The oil supply line (a) is also connected to one end of the backup line (g), and the other end of the backup line (g) is connected to the hydraulic oil tank (103); The backup pipeline (g) is equipped with a one-way valve (102) and a hand pump (106).

14. An electrically powered intelligent control plug-in device according to any one of claims 1 to 13, characterized in that: The coiled tubing blowout preventer includes two plug-in connectors (9), which are connected to the same wellhead tree. The plug-in / plug body can be hoisted by a crane to either of the two plug-in / plug connectors (9) and connected to them in a relative position.

15. An electrically powered intelligent control plug-in device according to claim 14, characterized in that: The connector of the plug-in device is equipped with a video monitoring device, and the crane's operator's cab is equipped with a wireless video receiver. Both the video monitoring device and the wireless video receiver are electrically connected to the control system.

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