Intelligent control two-stage coiled tubing under-pressure lifting system

Abstract

The invention relates to the technical field of petroleum machinery, in particular to an intelligent control two-stage type coiled tubing under-pressure lifting system which comprises a two-stage automatic hydraulic lifting system, a guide pipe righting and positioning system, a double-safety sealing system and an automatic operation control system. An upper-stage hydraulic lifting oil cylinder and a lower-stage hydraulic lifting oil cylinder are fixedly installed on the device frame body, and a lower moving cross beam is fixedly installed at the output end of the lower-stage hydraulic lifting oil cylinder through a plurality of locking nuts. The high-elasticity and double-tightness composite material has high elasticity and double tightness; a two-stage automatic hydraulic lifting system is adopted, multifunctional operation is achieved, and time saving and efficiency increasing are achieved; a guide pipe righting and positioning system is arranged, and rolling righting and flexible positioning are achieved; the stability of the system is intelligently and automatically operated and controlled; unloading is stable, and safety and reliability are achieved; the continuous operation is high-frequency; energy conservation and environmental protection are achieved, and safe operation is long-lasting.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum machinery, and in particular to an intelligently controlled two-stage coiled tubing pressure lifting system. Background Art

[0002] The intelligent controlled two-stage coiled tubing pressurized lifting system is a system device for the continuous lifting or lowering of coiled tubing with high efficiency for wellhead repair operations at surface pressure. It is mainly used for various operations such as downhole sand flushing, well washing, and well repair for wellheads with pressure. The pressure inside and outside the well is stable during normal operation. If the continuous lifting or lowering speed of the coiled tubing downhole is too fast, the pressure in the well will increase, which may affect the operation progress. On the contrary, if the continuous lifting or lowering speed of the coiled tubing downhole is too slow, the operation effect in the well will be unclear and the work efficiency is low. It mainly depends on the working efficiency of the wellbore coiled tubing pressurized lifting system. In order to improve the working efficiency of the coiled tubing pressurized lifting system, an intelligent controlled two-stage coiled tubing pressurized lifting system is specially designed. It is an intelligent controlled, efficient and safe system device that ensures continuous operation of the coiled tubing downhole under pressure.

[0003] The specific requirements of an intelligent two-stage continuous tubing pressurized lifting system are generally speaking: first of all, safe construction should be considered, secondly, cost should be reduced, and finally, operation should be convenient and fast to improve work efficiency.

[0004] When an existing intelligent two-stage continuous oil pipe pressurized lifting system is in use, the sealing performance of its safety sealing system is insufficient, making it difficult to implement multi-functional operations, save time and increase efficiency, lacking a catheter straightening and positioning system, and having unstable performance, not safe and reliable enough, and insufficient work efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligently controlled two-stage coiled tubing pressurized lifting system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: 1. The jack-up mechanism of the hydraulic cylinder and the control mechanism of the hydraulic cylinder is a key factor in the jack-up of the hydraulic cylinder. The hydraulic cylinder is connected to the control mechanism of the hydraulic cylinder and the control mechanism of the hydraulic cylinder. The hydraulic cylinder is connected to the control mechanism of the hydraulic cylinder by a button. The control mechanism of the hydraulic cylinder is connected to the control mechanism of the hydraulic cylinder by a button. The control mechanism of the hydraulic cylinder is connected to the control mechanism of the hydraulic cylinder by a button. The control mechanism of the hydraulic cylinder is connected to the control mechanism of the hydraulic cylinder by a button. An annular blowout preventer and a semi-closed gate blowout preventer installed on a two-stage automated hydraulic lifting system, wherein the semi-closed gate blowout preventer is arranged below the annular blowout preventer, and the two-stage automated hydraulic lifting system is fixedly installed with a connecting spool in Shanghai, and the automated operation control system comprises a pressure source control area, and the upper and lower ends of the connecting spool are respectively fixedly installed with a first well pressure sensor and a second well pressure sensor, and the pressure source control area is installed with an intelligent control display area and an intelligent operation control area, and the intelligent control display area comprises an in-well pressure display 1, an in-well pressure display 2, a hydraulic source system pressure display, a lifting system pressure display and a blowout preventer system pressure display, and the intelligent operation control area comprises an upper lifting cylinder operation switch, an upper cava device operation switch, a lower lifting cylinder operation switch, a lower cava device operation switch, an annular blowout preventer operation switch, an annular blowout preventer operation switch, a gate blowout preventer operation switch, a load relief valve operation switch and a circulating valve operation switch.

[0007] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: a unloading and pressure stabilizing system is fixedly installed on the two-stage automatic hydraulic lifting system, and the unloading and pressure stabilizing system includes an unloading valve and a circulating valve, and the unloading valve and the circulating valve are respectively installed at the left and right ends of the connecting four-way.

[0008] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the arc-shaped conduit groove is connected to the upper hydraulic lifting cylinder and the lower hydraulic lifting cylinder through a continuous oil pipe.

[0009] The advantages of the present invention are: the present invention has high elasticity and double tightness; a two-stage automatic hydraulic lifting system, which implements multifunctional operations and saves time and increases efficiency; it has a catheter righting and positioning system and flexible rolling righting and positioning; the stability of the intelligent and automatic operation control system; unloading and voltage stabilization, safety and reliability; continuous operation and high frequency; energy saving and environmental protection, and long-term safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the main structure of an intelligently controlled two-stage coiled tubing pressurized lifting system proposed by the present invention; Figure 2 This is a schematic structural diagram of an automatic control system for an intelligently controlled two-stage coiled tubing pressurized lifting system proposed by the present invention.

[0011] In the figure: 1 two-stage automatic hydraulic lifting system, 1.1 device frame, 1.2 upper hydraulic lifting cylinder, 1.3 lower hydraulic lifting cylinder, 1.4 upper moving beam, 1.5 upper moving clamping slip, 1.6 lower moving clamping slip, 1.7 locking nut, 1.8 lower moving beam, 2 catheter straightening and positioning system, 2.1 catheter bracket, 2.2 arc catheter groove, 2.3 catheter positioning roller, 2.4 roller fixing shaft, 2.5 catheter straightener, 3 double safety sealing system, 3.1 annular blowout preventer, 3.2 semi-closed gate blowout preventer, 3.3 connecting spool, 4 automatic operation control system, 4.1 first well pressure sensor, 4.2 second well pressure sensor, 4.3 intelligent control display area ,4.3.1 Well pressure display one,4.3.2 Well pressure display two,4.3.3 Hydraulic source system pressure display,4.3.4 Lifting system pressure display,4.3.5 BOP system pressure display,4.4 Intelligent operation control area,4.4.1 Upper lifting cylinder operation switch,4.4.2 Upper slip operation switch,4.4.3 Lower lifting cylinder operation switch,4.4.4 Lower slip operation switch,4.4.5 Annular blowout preventer operation switch,4.4.6 Gate blowout preventer operation switch,4.4.7 Unloading valve operation switch,4.4.8 Circulating valve operation switch,4.5 Pressure source control area,5 Unloading and pressure stabilizing system,5.1 Unloading valve,5.2 Circulating valve. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0013] Reference Figure 1-Figure 2As shown, an intelligent two-stage coiled tubing pressure lifting system comprises: a two-stage automatic hydraulic lifting system 1, a catheter straightening and positioning system 2, a double safety sealing system 3 and an automatic operation control system 4. The two-stage automatic hydraulic lifting system 1 comprises a device frame 1.1, on which an upper hydraulic lifting cylinder 1.2 and a lower hydraulic lifting cylinder 1.3 are fixedly installed, and a lower moving crossbeam 1.8 is fixedly installed at the output end of the lower hydraulic lifting cylinder 1.3 through a plurality of locking nuts 1.7, and a lower moving clamping slip 1.6 is fixedly connected to the lower moving crossbeam 1.8, and an upper moving crossbeam 1.4 is slidably connected to the two-stage automatic hydraulic lifting system 1. 4 is provided with an upper movable clamping slip 1.5; a catheter straightening and positioning system 2, which includes a catheter support 2.1, on which an arc-shaped catheter groove 2.2 is fixedly installed; a catheter straightener 2.5 is installed on the upper movable clamping slip 1.5, and the top of the catheter straightener 2.5 is rotatably connected to a catheter positioning roller 2.3 through a roller fixing shaft 2.4; a double safety sealing system 3 includes an annular blowout preventer 3.1 and a semi-closed gate blowout preventer 3.2 fixedly installed on the double-stage automatic hydraulic lifting system 4, and the semi-closed gate blowout preventer 3.2 is arranged below the annular blowout preventer 3.1, and the double-stage automatic hydraulic lifting system 1 is fixedly provided with a connecting cross 3. 3; the automatic operation control system 4 includes a pressure source control area 4.5, the upper and lower ends of the connecting cross 3.3 are respectively fixedly installed with a first well pressure sensor 4.1 and a second well pressure sensor 4.2, the pressure source control area 4.5 is installed with an intelligent control display area 4.3 and an intelligent operation control area 4.4, the intelligent control display area 4.3 includes a well pressure display 1 4.3.1, a well pressure display 2 4.3.2, a hydraulic source system pressure display 4.3.3, a lifting system pressure display 4.3.4 and a blowout preventer system pressure display 4.3.5; the intelligent operation control area 4.4 includes an upper lifting cylinder operation switch 4.4.1 and an upper slip operation switch 4.4. 2. Lower lifting cylinder operation switch 4.4.3, lower slip operation switch 4.4.4, annular blowout preventer operation switch 4.4.5, annular blowout preventer operation switch 4.4.5, gate blowout preventer operation switch 4.4.6, unloading valve operation switch 4.4.7 and circulating valve operation switch 4.4.8; the two-stage automatic hydraulic lifting system 1 is fixedly installed with an unloading and pressure stabilizing system 5, which includes an unloading valve 5.1 and a circulating valve 5.2, which are respectively installed at the left and right ends of the connecting four-way 3.3; the arc-shaped guide tube groove 2.2 is connected with the upper hydraulic lifting cylinder 1.2 and the lower hydraulic lifting cylinder 1.3 through a continuous oil pipe.

[0014] When the present invention is in normal operation, the lower part 3.3 of the coiled tubing pressurized lifting system is tightly and sealedly connected to the wellhead to be operated, so that the coiled tubing is lowered from the ground into the well or lifted from the well to the ground. During the whole operation, the coiled tubing is carried out in a completely sealed state with the well, and the whole operation process is controlled by both intelligence and automation. Before operation, the power switch of the 4.3 intelligent control display area in the 4 intelligent and automated operation control system should be turned on, and the start button should be pressed to check whether all the indicator lights in the upper row of the display area are normal, and to check whether the well pressure display 1 4.3.1, the well pressure display 2 4.3.2, the hydraulic source system pressure display 4.3.3, the lifting system pressure display 4.3.4 and the blowout prevention system in the lower row of the display area are normal. Check whether the pressure value of the pressure display 4.3.5 of the pressure sensor system meets the operation requirements. The well pressure display uploads pressure data in real time through the first well pressure sensor 4.1 and the second well pressure sensor 4.2; the hydraulic source display uploads pressure data in real time through the sensors of each part of the pressure source control area 4.5. After checking that all display lights and displayed pressures meet the operation requirements, turn on the main power switch of the intelligent operation control area 4.4, first turn on the annular blowout preventer operation switch 4.4.5 and the gate blowout preventer operation switch 4.4.6, and the intelligent system center will transmit the signal to the pressure source control area 4.5 according to the program, so that it automatically closes the annular blowout preventer 3.1 and the semi-closed gate blowout preventer 3.2 in the double safety sealing system 3, so that the rubber core is tight. Hold the coiled tubing to achieve the effect of annular sealing; then open the unloading valve operation switch 4.4.7 and the circulation valve operation switch 4.4.8, the intelligent system center will transmit the signal to the pressure source control area 4.5 according to the program, so that it will automatically close the unloading valve 5.1 and the circulation valve 5.2 in the unloading and pressure stabilizing system 5. At this time, the coiled tubing is in a safe and closed space; at this time, check the well pressure, and when the pressure displayed by the well pressure display 1 4.3.1 and the well pressure display 2 4.3.2 in the intelligent control display area 4.3 meets the operation requirements; continue to open the upper lifting cylinder operation switch 4.4.1, the upper tile slip operation switch 4.4.2, the lower lifting cylinder operation switch 4.4.3, and the lower tile slip operation switch 4.4.4, the intelligent system The center will transmit the signal to the pressure source control area 4.5 according to the program, so that it automatically closes the lower moving clamping slip 1.6 in the two-stage automatic hydraulic lifting system 1 to clamp the coiled tubing, and at the same time opens the upper moving clamping slip 1.5 to put it in a loose state; at this time, the intelligent system center will automatically start the lower hydraulic lifting cylinder 1.3 to carry the coiled tubing down the well, and the coiled tubing will enter the catheter positioning roller 2.3 fixed by the roller fixing shaft 2.4 through the 2.2 arc-shaped catheter groove above the catheter bracket 2.1 in the catheter straightening and positioning system 2, and finally be clamped down the well after being straightened by the catheter straightener 2.5, and at the same time, the upper hydraulic lifting cylinder 1.2 rises without load (the upper moving clamping slip 1.5 and the lower moving clamping slip 1.6 are separated by the locking nut 1.7 are fastened to the upper moving crossbeam 1.4 and the lower moving crossbeam 1.8, and finally fixed to the upper hydraulic lifting cylinder 1.2 and the lower hydraulic lifting cylinder 1.3, and the hydraulic lifting cylinder is fastened to the device frame 1.1 by bolts).

[0015] When the lower hydraulic lifting cylinder 1.3 reaches the lower limit and the upper hydraulic lifting cylinder 1.2 reaches the upper limit, the upper movable clamping slip 1.5 is closed to clamp the coiled tubing; at the same time, the lower movable clamping slip 1.6 is opened to release it; at this time, the intelligent system center will automatically start the upper hydraulic lifting cylinder 1.2 to continue to go down the well with the coiled tubing, and at the same time, the lower hydraulic lifting cylinder 1.3 rises without load. In this way, the up and down movement is completed by continuous alternating movements. If the tubing needs to be lifted from the well, the opposite procedure is used.

[0016] In order to keep track of the ever-changing well pressure during operation and to promptly perform ground operation control, the well pressure data is transmitted to the intelligent control center in real time through the first well pressure sensor 4.1 and the second well pressure sensor 4.2. After data analysis and processing, it is transmitted to the pressure source control area 4.5, which controls and adjusts the operating speed of the upper hydraulic lifting cylinder 1.2 and the lower hydraulic lifting cylinder 1.3 in the two-stage automatic hydraulic lifting system 1, and selects single-stage or two-stage lifting cylinder operation; when the well pressure is stable and does not change much, the intelligent system center can use the two-stage hydraulic lifting cylinder to operate simultaneously and at an appropriate speed to ensure continuous operation progress in the well to achieve the effect of saving time and increasing efficiency.

[0017] When the pressure in the well increases significantly but is not higher than the set pressure value, the intelligent system center can reduce the speed or use a single-stage hydraulic lifting cylinder to ensure stable pressure in the well; when the pressure in the well is too high and exceeds the set pressure value and is about to reach the limit value, the well pressure alarm on the 4.3 intelligent control display area will sound an alarm, and the intelligent system center will automatically stop the operation. At the same time, the intelligent system center will transmit the signal to the 4.5 pressure source control area according to the program to automatically open the 5.1 unloading valve in the 5 unloading and pressure stabilizing system to unload the pressure to a safe pressure pool. When the well pressure drops to the set pressure value, the 5.1 unloading valve in the intelligent system will automatically close and the entire system will operate normally. If the operation process requires water circulation in the well, the intelligent system center will transmit the signal to the 4.5 pressure source control area according to the program to stop the continuous tubing lifting operation, and automatically open the 5.2 circulation valve in the 5 unloading and pressure stabilizing system to perform water circulation operations.

[0018] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligently controlled two-stage coiled tubing pressure lifting system, characterized in that: include: A two-stage automated hydraulic lifting system (1), a catheter straightening and positioning system (2), a double safety sealing system (3) and an automated operation control system (4), wherein the two-stage automated hydraulic lifting system (1) comprises a device frame (1.1), an upper hydraulic lifting cylinder (1.2) and a lower hydraulic lifting cylinder (1.3) are fixedly mounted on the device frame (1.1), a lower movable crossbeam (1.8) is fixedly mounted on the output end of the lower hydraulic lifting cylinder (1.3) via a plurality of locking nuts (1.7), a lower movable clamping slip (1.6) is fixedly connected to the lower movable crossbeam (1.8), and an upper movable clamping slip (1.6) is slidably connected to the upper movable crossbeam (1). A movable crossbeam (1.4), wherein an upper movable clamping slip (1.5) is installed on the upper movable crossbeam (1.4); a catheter straightening and positioning system (2), wherein the catheter straightening and positioning system (2) comprises a catheter support (2.1), wherein the catheter support (2.1) is fixedly installed with an arc-shaped catheter groove (2.2), a catheter straightener (2.5) is installed on the upper movable clamping slip (1.5), and the top end of the catheter straightener (2.5) is rotatably connected to a catheter positioning roller (2.3) through a roller fixing shaft (2.4), and the double safety sealing system (3) comprises an annular blowout preventer (3.1) and a semi-closed gate blowout preventer fixedly installed on a double-stage automatic hydraulic lifting system (4). The semi-closed gate blowout preventer (3.2) is arranged below the annular blowout preventer (3.1); the two-stage automated hydraulic lifting system (1) is fixedly installed with a connecting spool (3.3); the automated operation control system (4) comprises a pressure source control area (4.5); the upper and lower ends of the connecting spool (3.3) are respectively fixedly installed with a first well pressure sensor (4.1) and a second well pressure sensor (4.2); the pressure source control area (4.5) is installed with an intelligent control display area (4.3) and an intelligent operation control area (4.4); the intelligent control display area (4.3) comprises an in-well pressure display 1 (4.3.1), an in-well pressure Display 2 (4.3.2), hydraulic source system pressure display (4.3.3), lifting system pressure display (4.3.4) and blowout preventer system pressure display (4.3.5), the intelligent operation control area (4.4) includes an upper lifting cylinder operation switch (4.4.1), an upper slip operation switch (4.4.2), a lower lifting cylinder operation switch (4.4.3), a lower slip operation switch (4.4.4), annular blowout preventer operation switch (4.4.5), annular blowout preventer operation switch (4.4.5), gate blowout preventer operation switch (4.4.6), unloading valve operation switch (4.4.7) and circulating valve operation switch (4.4.8).

2. The intelligent controlled two-stage coiled tubing pressure lifting system according to claim 1 is characterized in that: A load-relief pressure-stabilizing system (5) is fixedly installed on the two-stage automated hydraulic lifting system (1), wherein the load-relief pressure-stabilizing system (5) comprises a load-relief valve (5.1) and a circulation valve (5.2), wherein the load-relief valve (5.1) and the circulation valve (5.2) are respectively installed at the left and right ends of the connecting four-way valve (3.3).

3. The intelligent controlled two-stage coiled tubing pressure lifting system according to claim 1 is characterized in that: The arc-shaped conduit groove (2.2) is connected to the upper hydraulic lifting cylinder (1.2) and the lower hydraulic lifting cylinder (1.3) via a continuous oil pipe.

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