Fracturing wellhead device not prone to inclination

Abstract

The invention relates to the technical field of fracturing well mouths, in particular to a difficult-to-incline fracturing well mouth device which comprises a concrete bearing body, an oil conveying pipeline is embedded in the concrete bearing body, fracturing well mouth equipment is installed on the oil conveying pipeline, and a bottom plate is detachably installed at the upper end of the concrete bearing body. Fixing plates are fixed to the two sides of the upper end of the bottom plate, tensioning mechanisms are connected between the two sides of the fixing plates and the concrete bearing body, and the fixing plates and the bottom plate are connected through reinforcing mechanisms. The device is suitable for complex working conditions such as shale gas and ultrahigh-pressure oil and gas wells, especially for the environment where sand-containing fluid easily causes wellhead deviation, stable mounting and clamping of fracturing wellhead equipment can be achieved, mounting firmness and stability of the fracturing wellhead equipment are guaranteed, the periphery of the fracturing wellhead equipment can be fully tensioned and stably supported, mounting perpendicularity of the fracturing wellhead equipment is guaranteed, and the service life of the fracturing wellhead equipment is prolonged. And in addition, full protection on the connecting position can be effectively guaranteed, the supporting strength is improved, and the connecting firmness of fracturing wellhead equipment is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of fracturing wellheads, and in particular to a fracturing wellhead device that is not prone to tilting. Background Art

[0002] The fracturing wellhead device is an efficient production-increasing technology that increases the permeability of oil and gas reservoirs by injecting high-pressure liquid at the wellhead, thereby increasing oil and gas production. Most of the bottom of the fracturing wellhead device uses a fixed seat to connect to the wellhead device with bolts, which firmly fixes it to the wellhead equipment.

[0003] The tilting of the fracturing wellhead device is a common problem during its installation. This is mainly because after long-term use, the fracturing wellhead device may be fixed only with a fixed seat, and lacks corresponding adjustable protective support structures on both sides, which makes it easy to tilt. Therefore, we proposed a fracturing wellhead device that is not easy to tilt to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a fracturing wellhead device that is not prone to tilting.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A fracturing wellhead device that is not easy to tilt comprises a concrete carrier, an oil pipeline is buried in the concrete carrier, a fracturing wellhead equipment is installed on the oil pipeline, a bottom plate is detachably installed on the upper end of the concrete carrier, fixing plates are fixed on both sides of the upper end of the bottom plate, a tensioning mechanism is connected between the two sides of the fixing plate and the concrete carrier, the fixing plate and the bottom plate are connected by a reinforcement mechanism, the oil pipeline passes through the bottom plate and extends between the two fixing plates, a U-shaped carrier frame is commonly fixed at the upper ends of the two fixing plates, slide grooves are provided on both sides of the upper end of the U-shaped carrier frame, an adjusting mechanism is installed in the slide groove, one end of the adjusting mechanism is connected to a clamping mechanism, a clamping mechanism on the same side is clamped on one side of the fracturing wellhead equipment, and hydraulic stabilization components are connected on both sides of the fracturing wellhead equipment.

[0006] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: through holes are provided at the four corners of the upper end of the base plate, screws are passed through the through holes, the lower ends of the screws are connected to the upper end of the concrete carrier, and a mounting port is provided in the middle of the upper end of the base plate, and the oil pipeline passes through the mounting port and extends to the upper end of the base plate.

[0007] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the tensioning mechanism includes a second connecting ring fixed on both sides of the fixed plate, four L-shaped bolts are buried in the concrete bearing body, the upper end of the L-shaped bolt passes through the side wall of the base plate and extends to the upper end of the base plate, the upper end of the L-shaped bolt is fixed with a first connecting ring, and a reinforcing cable is connected between a first connecting ring on the same side and a second connecting ring on the same side.

[0008] In order to better achieve the above purpose, the present invention adopts a further technical solution: two embedded rods are embedded in the concrete bearing body, and one embedded rod on the same side is clamped with two L-shaped bolts on the same side.

[0009] In order to better achieve the above purpose, the present invention adopts a further technical solution: the reinforcement mechanism includes two fixing parts fixed on both sides of the upper end of the bottom plate, and the fixing parts are connected to a reinforcing rod, and one end of the reinforcing rod is fixed on one side of the fixing plate.

[0010] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the adjustment mechanism includes a slider arranged in a slide groove, one side of the slide groove is rotatably connected to a stud, one end of the stud passes through the side wall of the supporting frame and extends to one side of the supporting frame, one end of the stud is fixed with a rotating wheel, the slider is threaded on the stud, and the upper end of the slider is rotatably connected to a pull rod.

[0011] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the clamping mechanism includes a rotating block rotatably connected to both sides of the upper end of the supporting frame, one end of the rotating block is rotatably connected to a connecting rod, one end of a pull rod on the same side is rotatably connected to one end of the rotating block, both sides of the U-shaped supporting frame are rotatably connected to clamping rods, a connecting rod on the same side is rotatably connected to one end of a clamping rod on the same side, a first clamping ring is fixed to one end of the clamping rod, and a first clamping ring on the same side abuts against one side of the fracturing wellhead equipment.

[0012] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: a second clamping ring is fixed to one side of the bearing frame, and one end of the second clamping ring abuts against one side of the fracturing wellhead equipment.

[0013] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the hydraulic stabilization assembly includes mounting blocks fixed on both sides of the upper end of the U-shaped supporting frame, a hydraulic cylinder is fixedly installed on the mounting block, a push block is fixed at the end of the piston rod of the hydraulic cylinder, and the two push blocks respectively abut on both sides of the fracturing wellhead equipment.

[0014] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the fracturing wellhead equipment adopts a double sealing mechanism, and the fracturing wellhead equipment is made of nickel-chromium alloy.

[0015] In the present invention, a double sealing mechanism is adopted. For ultra-high pressure environment, a combination of metal sealing ring and high-pressure gasket is adopted, and the rubber sealing strip is compressed by elastic steel strip to ensure that the connection between the tubing head and the casing head can maintain sealing even if it is loose. It is made of nickel-chromium alloy material to enhance the ability to resist high pressure and corrosion, especially to reduce erosion in the sand-containing fracturing fluid environment.

[0016] In the present invention, when installation is required, the base plate is fixed on the concrete bearing body in advance, and then the reinforcing cables are connected between the embedded L-shaped bolts and the fixing plate, and then the rotating wheels are rotated to drive the studs to rotate, so as to realize the movement of the slider. As the slider moves, the pull rod is driven to adjust the rotating block, and the rotating block drives the connecting rod to adjust the clamping rod, so that the fracturing wellhead equipment is firmly and stably clamped by the clamping ring, and the reinforcing rods on both sides are further tightened and reinforced to keep it stable and vertical.

[0017] The present invention has the following advantages: 1. The combination of the clamping mechanism and the adjusting mechanism realizes the stable installation and clamping of the fracturing wellhead equipment, ensuring the firmness and stability of its installation; 2. Through the combination of the tensioning mechanism and the reinforcement mechanism, full tensioning and stable support are achieved around it, ensuring the verticality of its installation and achieving the adequacy of the installation; 3. The installation of the base plate combined with the concrete bearing body greatly improves the support stability and protection of the pipeline, effectively ensures the full protection of the connection, and improves the strength of the support; 4. Through the linkage structure of the fixed plate and the base plate, the support angle and displacement can be adjusted to adapt to different installation terrains, simplify the disassembly and assembly process, and reduce maintenance downtime; 5. Through the hydraulic stabilization component, the hydraulic compensation system can be automatically triggered when the wellhead inclination angle exceeds 2° to adjust the difference in support force on both sides; In summary, the present invention is suitable for complex working conditions such as shale gas and ultra-high pressure oil and gas wells, especially for environments where sand-containing fluids can easily cause wellhead deviation. It can not only achieve stable installation and clamping of fracturing wellhead equipment, ensuring the firmness and stability of its installation, but also fully tighten and stably support it all around, ensuring the verticality of its installation. In addition, it can effectively ensure sufficient protection of the connection, improve the strength of the support, and greatly improve the firmness of the connection of the fracturing wellhead equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present invention; Figure 2 It is a connection structure diagram of the clamping mechanism and the adjusting mechanism of the present invention; Figure 3 A structural diagram of the installation port of the present invention; Figure 4 This is a diagram of the L-shaped bolt embedding structure of the present invention; Figure 5 for Figure 1 A magnified view of the structure at A; Figure 6 for Figure 2 A magnified view of the structure at B; Figure 7 This is a structural diagram of the hydraulic stabilization component of the present invention.

[0019] In the figure: 1 first clamping ring, 2 connecting rod, 3 clamping rod, 4 reinforcing cable, 5 oil pipeline, 6 bottom plate, 7 fixing part, 8 concrete bearing body, 9 screw, 10 L-shaped bolt, 11 reinforcing rod, 12 fixing plate, 13 U-shaped bearing frame, 14 second clamping ring, 15 fracturing wellhead equipment, 16 mounting port, 17 first connecting ring, 18 embedded rod, 19 second connecting ring, 20 slider, 21 rotating wheel, 22 stud, 23 slide groove, 24 pull rod, 25 rotating block, 26 pushing block, 27 hydraulic cylinder, 28 mounting block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-6 A fracturing wellhead device that is not easy to tilt includes a concrete bearing body 8, an oil pipeline 5 is buried in the concrete bearing body 8, and a fracturing wellhead device 15 is installed on the oil pipeline 5. The upper end of the concrete bearing body 8 is detachably installed with a bottom plate 6, and the four corners of the upper end of the bottom plate 6 are provided with through holes, and screws 9 are penetrated in the through holes. The lower end of the screw 9 is connected to the upper end of the concrete bearing body 8, and the bottom plate 6 is firmly installed on the concrete bearing body 8 to ensure the overall strength. The concrete bearing body 8 adopts a prefabricated high-strength concrete bearing body, and a hole is reserved inside and a pressure anchor is embedded The plate, combined with the steel strand and the pile concrete, forms a compressive core, which significantly improves the anti-floating performance. The high-strength concrete bearing body is prefabricated in the factory to ensure strength stability. In the collapsible loess area, the soil layer needs to be penetrated and vibrated to compact it. The construction of the anchor system needs to be combined with directional components (such as steel pipes and angle steels) to ensure the verticality of the hammer to avoid hammer jamming or casing cracking. The construction of the pressurized water and soil layer requires anti-surge measures, such as grouting reinforcement or the setting of drainage channels. The pouring of large-volume concrete requires the laying of cooling pipes (50mm inner diameter steel pipes, horizontal spacing of 0.6m) and layered vibration to prevent temperature cracks.

[0022] A fixing plate 12 is fixed on both sides of the upper end of the base plate 6, and a tensioning mechanism is connected between the two sides of the fixing plate 12 and the concrete bearing body 8. The tensioning mechanism includes a second connecting ring 19 fixed on both sides of the fixing plate 12. Four L-shaped bolts 10 are buried in the concrete bearing body 8. The upper ends of the L-shaped bolts 10 penetrate the side wall of the base plate 6 and extend to the upper end of the base plate 6. A first connecting ring 17 is fixed to the upper end of the L-shaped bolt 10. A reinforcing cable 4 is connected between a first connecting ring 17 on the same side and a second connecting ring 19 on the same side. The tensile strength of the reinforcing cable 4 is 500-2000 Newtons / square millimeters, and the strength grade of the reinforcing cable 4 is 1770MPa. The two ends of the fixing plate 12 can be fully tightened and reinforced to fully improve the overall strength.

[0023] The reinforced cable 4 is made of a combination of steel core and PVC material. The steel core is used as the skeleton material, which significantly improves the compressive and tensile strength of PVC, and can withstand the pressure and weight in complex environments; the support of the steel core enables the material to have excellent impact resistance, which is suitable for scenes with high strength requirements. At the same time, the PVC outer layer can effectively resist friction and wear; the PVC outer layer has strong resistance to chemical substances such as acids, alkalis, and salts, protecting the steel core from corrosion, and is especially suitable for chemical and underground pipeline environments; the PVC material remains stable in the range of -30°C to 80°C, and combined with the support of the steel core, it can adapt to cold or high temperature environments.

[0024] The fixed plate 12 and the base plate 6 are connected by a reinforcement mechanism, which includes two fixing members 7 fixed on both sides of the upper end of the base plate 6, and a reinforcing rod 11 is connected to the fixing member 7, one end of the reinforcing rod 11 is fixed on one side of the fixed plate 12, and the setting of the reinforcing rod 11 can further support and reinforce both sides to ensure the stability of the support; the oil pipeline 5 passes through the base plate 6 and extends between the two fixed plates 12, and a mounting opening 16 is provided in the middle of the upper end of the base plate 6. The oil pipeline 5 passes through the mounting opening 16 and extends to the upper end of the base plate 6. Mounting openings 16 of different diameters are selected according to the diameter of the oil pipeline 5.

[0025] A U-shaped supporting frame 13 is commonly fixed at the upper ends of the two fixed plates 12. Slide grooves 23 are provided on both sides of the upper end of the U-shaped supporting frame 13. An adjustment mechanism is installed in the slide groove 23. The adjustment mechanism includes a slider 20 arranged in the slide groove 23. A stud 22 is rotatably connected to one side of the slide groove 20. One end of the stud 22 penetrates the side wall of the supporting frame 13 and extends to one side of the supporting frame 13. A rotating wheel 21 is fixed to one end of the stud 22. The slider 20 is threadedly screwed on the stud 22. The upper end of the slider 20 is rotatably connected to a pull rod 24. The movement of the slider 20 drives the pull rod 24 to move, thereby making adjustments.

[0026] One end of the adjusting mechanism is connected to a clamping mechanism, which includes a rotating block 25 rotatably connected to both sides of the upper end of the bearing frame 13, one end of the rotating block 25 is rotatably connected to a connecting rod 2, one end of a pull rod 24 on the same side is rotatably connected to one end of the rotating block 25, both sides of the U-shaped bearing frame 13 are rotatably connected to a clamping rod 3, a connecting rod 2 on the same side is rotatably connected to one end of a clamping rod 3 on the same side, one end of the clamping rod 3 is fixed with a first clamping ring 1, a first clamping ring 1 on the same side abuts against one side of the fracturing wellhead equipment 15, through the first clamping ring 1 and The combination of the second clamping ring 14 greatly improves the clamping and fixing of the fracturing wellhead equipment 15. The connection rod 2 is adjusted by rotating the rotating block 25. The two adjusting mechanisms respectively adjust the two clamping mechanisms, and a support block can be padded on one side of the clamping ring as needed; a clamping mechanism on the same side is clamped on one side of the fracturing wellhead equipment 15, and two embedded rods 18 are embedded in the concrete bearing body 8. The embedded rod 18 on the same side is clamped with the two L-shaped bolts 10 on the same side, which further improves the installation strength of the L-shaped bolts 10 and ensures the stability and firmness of the tightening thereof.

[0027] A second clamping ring 14 is fixed to one side of the supporting frame 13, and one end of the second clamping ring 14 abuts against one side of the fracturing wellhead equipment 15. The fracturing wellhead equipment 15 adopts a double sealing mechanism. For ultra-high pressure environments (such as 175MPa), a combination of a metal sealing ring and a high-pressure gasket is used, and the rubber sealing strip is compressed by an elastic steel strip to ensure that the connection between the tubing head and the casing head can maintain sealing even if it is loose. It is made of nickel-chromium alloy to enhance the ability to resist high pressure and corrosion, especially to reduce erosion in a sand-containing fracturing fluid environment.

[0028] Reference Figure 7 The hydraulic stabilization component includes a mounting block 28 fixed on both sides of the upper end of the U-shaped bearing frame 13, a hydraulic cylinder 27 is fixedly installed on the mounting block 28, and a push block 26 is fixed at the end of the piston rod of the hydraulic cylinder 27. The two push blocks 26 are respectively in contact with the two sides of the fracturing wellhead equipment 15. A three-axis gyroscope sensor (accuracy 0.01°) is built into the bottom plate of the fracturing wellhead equipment 15. When the inclination angle exceeds the safety threshold (set value 3°), the sound and light alarm is automatically triggered and the hydraulic stabilization component is started; by introducing the hydraulic stabilization component, when it is detected that the wellhead inclination angle exceeds 2°, the hydraulic compensation system is automatically triggered to adjust the support force difference on both sides (adjustment accuracy ±0.5kN); in the present invention, the anti-tilting ability of the entire device can be improved by more than 40%, and the service life is extended by 30%. In the 175MPa ultra-high pressure test, the sealing mechanism can still maintain effective sealing when the bolts are loose, and the leakage rate is lower than the industry standard.

[0029] In the present invention, when installation is required, the base plate 6 is fixed on the concrete bearing body 8 in advance, and then the reinforcing cable 4 is connected between the embedded L-shaped bolts 10 and the fixing plate 12, and then the rotating wheels 21 are rotated to drive the studs 22 to rotate, so as to realize the movement of the slider 20. As the slider 20 moves, the pull rod 24 is driven to adjust the rotating block 25, and the rotating block 25 drives the connecting rod 2 to adjust the clamping rod 3, so that the fracturing wellhead equipment 15 is firmly and stably clamped by the clamping ring, and the reinforcing rods on both sides are further tightened and reinforced to keep it stable and vertical, which can simplify the disassembly and assembly process and reduce maintenance downtime. It is suitable for complex working conditions such as shale gas and ultra-high pressure oil and gas wells, especially for environments where sand-containing fluids are prone to wellhead deviation.

[0030] 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. A fracturing wellhead device that is not easy to tilt, comprising a concrete bearing body (8), characterized in that: An oil pipeline (5) is buried in the concrete carrier (8), and a fracturing wellhead equipment (15) is installed on the oil pipeline (5). A bottom plate (6) is detachably installed on the upper end of the concrete carrier (8), and fixing plates (12) are fixed on both sides of the upper end of the bottom plate (6). A tensioning mechanism is connected between the two sides of the fixing plate (12) and the concrete carrier (8), and the fixing plate (12) and the bottom plate (6) are connected via a reinforcement mechanism. The oil pipeline (5) passes through the bottom plate (6) and extends between the two fixing plates (12). A U-shaped carrier frame (13) is fixed to the upper ends of the two fixing plates (12). Slide grooves (23) are provided on both sides of the upper end of the U-shaped carrier frame (13), and an adjustment mechanism is installed in the slide groove (23). One end of the adjustment mechanism is connected to a clamping mechanism, and a clamping mechanism on the same side is clamped on one side of the fracturing wellhead equipment (15). Both sides of the fracturing wellhead equipment (15) are connected to hydraulic stabilization components.

2. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: Through holes are provided at the four corners of the upper end of the base plate (6), screws (9) are inserted into the through holes, the lower ends of the screws (9) are connected to the upper end of the concrete carrier (8), a mounting opening (16) is provided in the middle of the upper end of the base plate (6), and the oil pipeline (5) passes through the mounting opening (16) and extends to the upper end of the base plate (6).

3. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: The tensioning mechanism comprises a second connecting ring (19) fixed on both sides of the fixing plate (12); four L-shaped bolts (10) are embedded in the concrete bearing body (8); the upper ends of the L-shaped bolts (10) penetrate the side wall of the bottom plate (6) and extend to the upper end of the bottom plate (6); the upper ends of the L-shaped bolts (10) are fixed with a first connecting ring (17); and a reinforcing cable (4) is connected between a first connecting ring (17) on the same side and a second connecting ring (19) on the same side.

4. The non-tiltable fracturing wellhead device according to claim 3, characterized in that: Two embedded rods (18) are embedded in the concrete bearing body (8), and one embedded rod (18) on the same side is clamped with two L-shaped bolts (10) on the same side.

5. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: The reinforcement mechanism comprises two fixing members (7) fixed to both sides of the upper end of the bottom plate (6), the fixing members (7) being connected to a reinforcing rod (11), one end of the reinforcing rod (11) being fixed to one side of the fixing plate (12).

6. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: The adjustment mechanism comprises a slider (20) arranged in a slide groove (23), one side of the slide groove (20) is rotatably connected to a stud (22), one end of the stud (22) penetrates the side wall of the supporting frame (13) and extends to one side of the supporting frame (13), one end of the stud (22) is fixed with a rotating wheel (21), the slider (20) is threadedly screwed on the stud (22), and the upper end of the slider (20) is rotatably connected to a pull rod (24).

7. The non-tiltable fracturing wellhead device according to claim 6, characterized in that: The clamping mechanism comprises a rotating block (25) rotatably connected to both sides of the upper end of the supporting frame (13); one end of the rotating block (25) is rotatably connected to a connecting rod (2); one end of a pull rod (24) on the same side is rotatably connected to one end of the rotating block (25); both sides of the U-shaped supporting frame (13) are rotatably connected to clamping rods (3); a connecting rod (2) on the same side is rotatably connected to one end of a clamping rod (3) on the same side; a first clamping ring (1) is fixed to one end of the clamping rod (3); and the first clamping ring (1) on the same side abuts against one side of the fracturing wellhead equipment (15).

8. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: A second clamping ring (14) is fixed to one side of the bearing frame (13), and one end of the second clamping ring (14) abuts against one side of the fracturing wellhead equipment (15).

9. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: The hydraulic stabilization assembly comprises mounting blocks (28) fixed on both sides of the upper end of the U-shaped bearing frame (13), a hydraulic cylinder (27) being fixedly mounted on the mounting blocks (28), a push block (26) being fixed at the end of the piston rod of the hydraulic cylinder (27), and the two push blocks (26) respectively abutting against both sides of the fracturing wellhead equipment (15).

10. The non-tiltable fracturing wellhead device according to claim 1, characterized in that: The fracturing wellhead equipment (15) adopts a double sealing mechanism, and the fracturing wellhead equipment (15) is made of a nickel-chromium alloy material.

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