Wellhead blowout wrecking device for petroleum well

Abstract

The utility model relates to a petroleum well mouth blowout wrecking device which is provided with a rotatable fixing mechanism and a blowout prevention control mechanism, an upper chuck and a lower chuck are arranged in the rotatable fixing mechanism, nut sleeving holes and device fixing holes are formed in the upper chuck and the lower chuck, and the upper chuck is connected with a rotating support through a connecting pin shaft; the nut sleeving hole can be connected with a nut of a wellhead bolt in a large four-way flange plate in a sleeving mode, and the upper chuck and the lower chuck are fixed to the outer face of the large four-way flange plate through the device fixing hole and a bolt. The blowout prevention control mechanism is mainly composed of a longitudinal adjusting rod and a plug valve, and the longitudinal adjusting rod is fixedly connected with the plug valve and connected with the rotary support through a transverse telescopic rod. According to the device, the work efficiency of replacement due to damage and piercing leakage of the sleeve gate is greatly improved, various defects in emergency repair due to blowout risks in the past are overcome, and the device has the advantages of being high in installation speed and safe and reliable in work and is remarkable in use effect.

Description

Technical Field

[0001] The utility model relates to a quick-spraying maintenance device for casing gates in the petroleum industry, in particular to a quick-spraying device for a wellhead of an oil well. Background Art

[0002] In the oil industry, if the casing gate at the wellhead is punctured or leaked, it is very likely to cause a blowout accident and must be replaced in time. At present, the most commonly used casing gate replacement device at the production site is the HK-4 rush-blow device. Because the rush-blow distance cannot be adjusted, its application range is relatively narrow and can only be used for the replacement of casing gates. In addition to the casing gates that are easily damaged or stolen and lost, which may cause blowouts, the large four-way without casing gates installed is also a wellhead component that is prone to cause blowouts.

[0003] The existing HK-4 spraying device is composed of a mounting seat, a fork head assembly, a guide column assembly, a longitudinal guide cylinder seat, a horizontal adjustment screw, a longitudinal adjustment nut, a longitudinal guide cylinder, a fixed clamp head and other components. However, there are the following disadvantages during use:

[0004] 1. Since the distance between the horizontal pipe of the riser guide tube in the wellhead Christmas tree and the casing gate is too small, the emergency spraying device cannot be turned up, resulting in the failure of replacing the casing gate; 2. The body of the belt pumping unit and the intelligent electric drum pumping unit is too close to the wellhead, leaving no operating space for the existing emergency spraying device; 3. During the use of the existing emergency spraying device, it is necessary to remove the bolts of the large four-way in the wellhead device, hereinafter referred to as the wellhead bolts, and install the device on the large four-way at the wellhead, which poses a major safety hazard and is time-consuming and laborious to disassemble; 4. During the installation and use of the existing emergency spraying device, at least two wellhead bolts must be removed. In the face of the on-site situation where a blowout is about to or is occurring, this is an extremely unsafe operating behavior with major risks. safety hazards; 5. When installing and using the existing emergency spraying device, it is necessary to replace the original wellhead bolts with extended bolts, and the wellhead bolts must be removed for each installation; due to long-term use and rust, it is time-consuming and laborious to remove the wellhead bolts of the wellhead to be repaired, and the wellhead bolts are not easy to be removed from the original wellhead bolt holes, which delays the emergency spraying time and increases the risk of uncontrolled blowout; 6. The existing emergency spraying device is bulky and heavy, and at least three people are required to complete the installation operation at the emergency spraying site; the above-mentioned installation operation time for the emergency spraying device takes an average of at least 30 minutes for three people to complete the installation; the installation operation time is long, the workload is large, and the labor intensity of the workers is high, which seriously affects the work efficiency of the emergency spraying operation and increases the safety risks of the operating workers.

[0005] The current spraying devices have high safety risks, long installation time, high labor intensity and major safety hazards.

[0006] In order to solve the above problems, after searching, there are currently the following patent technologies related to the vertical pipe spraying device of the oil well: Patent application number CN200620018269.3 discloses a casing head spraying device, which is connected from top to bottom by a blowout preventer, a blowout preventer and a large four-way flange, and a casing buckle making device is installed at the bottom of the large four-way flange. When using the above casing head spraying device, first connect the above casing head spraying device, then lift the device with a lifting device and center it with the wellhead, and at the same time guide the oil and gas flow sprayed out of the well upward through the nozzle, and fix the casing head spraying device with a ground anchor for easy operation at the wellhead, use the weight of the spraying device to pressurize the casing head at the wellhead, rotate the spraying device through the booster rod, and use the casing buckle making device at its lower part to make a buckle on the exposed end of the casing head at the wellhead. The casing buckle making device can be a casing male cone buckle making device or a casing female cone buckle making device, which depends on the wellhead casing conditions. The material hardness of the buckle making device should be greater than the material hardness of the casing. After the buckle is made, the blowout preventer is closed and the squeeze well system is established to complete the rush blowout operation. The diameter of the above-mentioned buckle making device should match the diameter of the wellhead casing head.

[0007] When using the utility model, if the casing head at the wellhead is seriously damaged and cannot meet the conditions for making a buckle, the buckle making device at the bottom of the rush spray device can be replaced with a nylon sealing nipple, and the nylon sealing nipple is squeezed into the casing head under pressure through the rush spray device to achieve well killing and sealing. The diameter of the nylon sealing nipple should match the diameter of the wellhead casing head.

[0008] The above invention only solves the problem of rapid blowout when the wellhead casing head is damaged, and cannot effectively solve the problem of replacing the casing gate when the wellhead casing gate is missing or damaged.

[0009] Patent application number CN201020115852.2 discloses a wellhead switch plugging and spraying prevention device, which is applied to the oilfield production wellhead four-way special switch plugging and spraying prevention device. It mainly consists of three parts: a hydraulic cylinder assembly, a blowout preventer assembly and a valve internal leak-proof packer assembly; the hydraulic cylinder assembly is fixed to the flange of the blowout preventer assembly by stud bolts, and there is a leak-proof packer in the blowout preventer of the blowout preventer assembly, and the outer pipe end of the leak-proof packer is fixed in the center hole of the anti-rotation flange.

[0010] The use effect of the above invention is: mainly rely on the plugging packer to anchor and seal at the casing four-way outlet, compress the sealant tube to seal the outlet to achieve the purpose of rushing to spray and plug the leak. After the leak forms a blowout, rushing to spray can be carried out. At the initial stage of valve leakage, pressure plugging is implemented.

[0011] However, the above invention can only be used to replace and seal the blowout when the pressure is low or there is no pressure. During the blowout repair work under high pressure, the above device cannot be normally inserted into the inner cavity of the large four-way of the wellhead, and cannot effectively seal the wellhead or complete the blowout rescue work under high pressure. Summary of the invention

[0012] In order to solve the above problems, the utility model provides an oil wellhead emergency blowout device, which can be used for different wellheads, different models and categories of oil pumps, overcomes the problems of existing emergency blowout devices due to small wellhead space and inconvenient installation, avoids the safety hazards and possible safety accidents caused by disassembling the bolts of the blowout wellhead, and improves the working efficiency of the wellhead emergency blowout device.

[0013] The technical solution of the utility model is: an oil well wellhead blowout prevention device, which is provided with a rotatable fixing mechanism and a blowout prevention control mechanism, wherein: an upper chuck and a lower chuck are provided in the rotatable fixing mechanism, a nut sleeve hole and a device fixing hole are provided in the upper chuck and the lower chuck, the upper chuck is connected with a rotating bracket through a connecting pin; the nut sleeve hole can be sleeved with the nut of the wellhead bolt in a large four-way flange, and the upper chuck and the lower chuck are fixed to the outside of the large four-way flange through the device fixing hole and the bolt; the blowout prevention control mechanism is mainly composed of a longitudinal adjustment rod and a plug valve, the longitudinal adjustment rod is fixedly connected to the plug valve and is connected to the rotating bracket through a transverse telescopic rod.

[0014] Preferably, the rotating bracket is an arc-shaped bracket, and a bracket placement plate is also installed below the rotating bracket and between the lower chuck, and the upper chuck, the rotating bracket and the bracket placement plate are all connected through the connecting pin hole and the connecting pin therein.

[0015] Preferably, the bracket placement plate is a semicircular disc-shaped body that matches the outer circle of the rotating bracket and the large four-way flange, and one or more connecting pin holes are arranged in the semicircular disc-shaped body; the connecting pin hole in the upper chuck is placed between the two device fixing holes.

[0016] Preferably, the unfolded length of the rotating bracket is half of the unfolded length of the bracket placement plate and connecting pin holes are provided at both ends.

[0017] Preferably, the upper chuck is a fan-shaped disc, and the nut sleeve hole, the device fixing hole and the connecting pin hole are arranged from the inside to the outside.

[0018] Preferably, the lower chuck is a fan-shaped disk and the outer edge disk body is provided with a clamping step higher than the inner edge disk body, the nut sleeve hole is arranged in the inner edge disk body of the lower chuck, and the device fixing hole is arranged in the clamping step of the lower chuck.

[0019] Preferably, the front end of the plug valve is connected to the spray clamp head 12 through the outer thread of the valve body.

[0020] Preferably, the transverse telescopic rod is composed of an outer telescopic tube and an inner telescopic rod, the inner telescopic rod is installed in the outer telescopic tube, the inner telescopic rod and the outer telescopic tube are connected by a thread, and an adjustment square is provided at the outer end of the inner telescopic rod.

[0021] Preferably, the longitudinal adjustment rod is mainly composed of a connecting short section, a fixing ring, a plug valve fixing hoop and a connecting seat. Both ends of the connecting short section are provided with external threads and the rotation directions of the external threads at both ends are opposite. The upper end of the connecting short section is threadedly connected to the connecting seat, and the lower end is threadedly connected to the fixing ring provided with a plug valve fixing hoop.

[0022] Preferably, an adjusting handle is provided on the outside of the main body of the connecting short section; the connecting seat is provided with an internal thread and can be threadedly connected to the inner telescopic rod, and the plug valve fixing hoop is provided with an internal thread and fixed to the lower end of the fixing ring.

[0023] The utility model has the following significant use effects: in view of the situation that the casing gate of the existing wellhead is damaged or missing, the utility model installs and uses a small and light plug valve, which can quickly replace and install the gate in a narrow space; because the clamp head of the casing gate in the wellhead device and the clamp head of the large four-way wellhead are common components, the utility model can make the plug valve installed therein conveniently connected with the clamp head of the wellhead component under the adjustment action of the rotating bracket, the horizontal telescopic rod and the longitudinal adjustment rod. The wellhead component clamp head referred to here includes the casing gate clamp head and the large four-way clamp head, so as to achieve the purpose of rapid spraying.

[0024] The device directly installs the upper chuck and the lower chuck on the nuts of the large four-way flange bolts in the original wellhead device through the nut sleeve holes. The device can be fixed on the large four-way flange by using the device fixing holes processed in the upper chuck and the lower chuck and the bolts installed therein. The installation of the device and the replacement of the gate can be completed without removing the bolts in the large four-way flange of the original well.

[0025] This emergency spraying device greatly improves the efficiency of replacing casing gates due to damage and puncture leakage, and significantly changes the previous emergency repairs that rely on manual removal of bolts in the original wellhead large four-way, which is time-consuming and labor-intensive, and has a small operating space. The original emergency repair device is inconvenient to use, the casing gate is difficult to replace, and safety is not guaranteed. This emergency spraying device has the characteristics of fast installation speed and safe and reliable operation. It effectively avoids the safety hazards and possible safety accidents caused by removing the bolts in the wellhead of a blowout, and significantly improves the efficiency of emergency spraying when the wellhead casing gate and the large four-way in the wellhead are damaged. The casing gate can be quickly replaced by one person, and the installation is quick, safe, reliable, convenient and fast. Its main effects are as follows:

[0026] The utility model mainly consists of an upper chuck, a lower chuck and a bracket fixing plate and other components. The upper chuck and the lower chuck are respectively placed on the upper and lower bolt caps of the large four-way flange plate, and then are fastened with bolts in the device fixing holes in the upper chuck and the lower chuck. There is no need to remove the original wellhead bolts, which effectively improves the installation speed of the emergency blowout device and significantly reduces or avoids the risk of blowout.

[0027] (2) The utility model provides a connecting pin between the upper chuck and the device fixing hole of the bracket placement plate, and a rotating bracket is installed through the connecting pin. The rotating bracket is an arc-shaped frame with the same arc as the bracket placement plate, which can rotate left and right. It can rotate outward and align the plug valve with the wellhead component clamp head through the adjustment of the longitudinal adjustment rod, and the plug valve is installed in the wellhead component clamp head to control the blowout; it can rotate inward to fit with the outer edge of the bracket placement plate, which is convenient for storage and storage.

[0028] (3) The rotating bracket in the utility model is supported by the bracket placement plate and the lower chuck at the bottom, which can well bear the weight of the rotating bracket and the plug valve.

[0029] (4) The utility model can control and replace casing gates located at different positions of the wellhead by replacing the position of the nut sleeve hole and changing the installation position of the device in the large four-way flange.

[0030] (5) The position between the plug valve and the clamp head of the wellhead component in the utility model can be adjusted by means of the transverse telescopic rod and the longitudinal adjustment rod. Under the action of the rotating bracket, the clamp head at the front of the plug valve or the tubular thread of the plug valve is connected to the failed casing gate or plug for plugging and replacement.

[0031] In summary, the utility model changes the current replacement method of casing gates in casing gate leakage wells and casing gate failure wells, has significant use effect and can produce good economic benefits, and has good application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 It is a top view of the schematic structural diagram of the utility model.

[0034] Figure 2 yes Figure 1 Bottom view of .

[0035] Figure 3 It is the assembly diagram of the rotating bracket.

[0036] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle lateral adjustment rod.

[0037] Figure 5 yes Figure 1 Schematic diagram of the structure of the longitudinal adjustment rod.

[0038] In the figure: bracket placement plate 1, nut socket hole 2, wellhead bolt 3, device fixing hole 4, large four-way flange 5, wellhead component clamp head 6, rotating bracket 7, outer telescopic cylinder 8, inner telescopic rod 9; longitudinal adjustment rod 10, connecting short circuit 10-1, adjusting handle 10-2, fixing ring 10-3, plug valve fixing hoop 10-4, connecting seat 10-5; plug valve 11, spray clamp head 12, upper chuck 13, lower chuck 14, connecting pin 15. DETAILED DESCRIPTION

[0039] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of the present utility model. The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0041] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0042] See also Figure 1 - Figure 5, a wellhead blowout prevention device for an oil well, provided with a rotatable fixing mechanism and a blowout prevention control mechanism, wherein: an upper chuck 13 and a lower chuck 14 are provided in the rotatable fixing mechanism, a nut sleeve hole 2 and a device fixing hole 4 are provided in the upper chuck 13 and the lower chuck 14, the upper chuck 13 is connected to a rotating bracket 7 through a connecting pin 15; the nut sleeve hole 2 can be sleeved with the nut of the wellhead bolt 3 in the large four-way flange 5, and the upper chuck 13 and the lower chuck 14 are fixed to the outside of the large four-way flange 5 through the device fixing hole 4 and bolts;

[0043] The blowout prevention control mechanism is mainly composed of a longitudinal adjustment rod 10 and a plug valve 11. The longitudinal adjustment rod 10 is fixedly connected to the plug valve 11 and is connected to the rotating bracket 7 through a transverse telescopic rod.

[0044] The device directly mounts the upper chuck 13 and the lower chuck 14 on the nut of the original wellhead bolt through the nut sleeve hole 2. The device fixing hole 4 processed in the upper chuck 13 and the lower chuck 14 and the bolts installed therein can be used to fix the device on the wellhead, and the wellhead bolts in the large four-way flange 5 of the original wellhead can be removed to complete the installation of the device and the replacement of the casing gate. The rotating bracket 7 is connected to the upper chuck 13 and installed between the upper chuck 13 and the lower chuck 14. The lower chuck 14 serves as a supporting component of the rotating bracket 7 and can meet the use requirements of the blowout prevention control mechanism.

[0045] The utility model can well cope with the situation that the casing gate of the wellhead is damaged or missing. In a narrow space, by rotating the bracket 7, the transverse telescopic rod and the longitudinal adjusting rod 10, the position and direction between the plug valve 11 and the wellhead component clamp head 6 can be quickly adjusted, and the damaged and missing casing gate can be replaced and installed, or the clamp head in the large four-way without casing gate can be blocked, so as to conveniently and quickly achieve the purpose of emergency blowout of the wellhead device, and can greatly reduce the risk of blowout and all adverse consequences caused by blowout.

[0046] Based on the above embodiment 1, the utility model also has the following embodiments:

[0047] A preferred embodiment: the rotating bracket 7 is an arc-shaped bracket, and a bracket placement plate 1 is also installed between the lower part of the rotating bracket 7 and the lower chuck 14. The upper chuck 13, the rotating bracket 7 and the bracket placement plate 1 are all connected through the connecting pin hole and the connecting pin therein. After adding the bracket placement plate 1, the supporting effect of the rotating bracket 7 can be well enhanced, and it is also convenient to store the rotating bracket 7 when in use. If the bracket placement plate 1 is not provided, it is sufficient to increase the thickness of the rotating bracket 7.

[0048] A preferred embodiment: the bracket placement plate 1 is a semicircular disc-shaped body that matches the outer circle of the rotating bracket 7 and the large four-way flange 5, and more than one connecting pin hole is arranged in the semicircular disc-shaped body; the connecting pin hole in the upper chuck 13 is placed between the two device fixing holes 4. Three connecting pin holes are evenly distributed in the bracket placement plate 1 in the drawings of the specification, the middle connecting pin hole is used for connecting with the upper chuck 13, and the connecting pin holes at both ends can be used as temporary connecting pin holes of the rotating bracket 7, which is convenient for storage and storage.

[0049] A preferred embodiment: the unfolded length of the rotating bracket 7 is half of the unfolded length of the bracket placement plate 1 and connecting pin holes are provided at both ends.

[0050] A preferred embodiment: the upper chuck 13 is a sector-shaped disk, and the nut sleeve hole 2, the device fixing hole 4 and the connecting pin hole are arranged from the inside to the outside.

[0051] A preferred embodiment: the lower chuck 14 is a fan-shaped disk and the outer edge disk body is provided with a clamping step higher than the inner edge disk body, the nut socket hole 2 is arranged in the inner edge disk body of the lower chuck 14, and the device fixing hole 4 is arranged in the clamping step of the lower chuck 14.

[0052] A preferred embodiment: the front end of the plug valve 11 is connected to the spray clamp head 12 through the outer thread of the valve body. When spraying at the wellhead, the plug valve 11 can be connected to the clamp head of the casing gate or the clamp head of the large four-way through the spray clamp head 12 according to the on-site situation.

[0053] A preferred embodiment: the transverse telescopic rod is composed of an outer telescopic tube 8 and an inner telescopic rod 9, the inner telescopic rod 9 is installed in the outer telescopic tube 8, the inner telescopic rod 9 and the outer telescopic tube 8 are connected by threads, and an adjustment square is provided at the outer end of the inner telescopic rod 9. By rotating the adjustment square of the inner telescopic rod 9, the inner telescopic rod 9 can be extended and retracted in the outer telescopic tube 8, and the distance between the inner telescopic rod 9 and the wellhead component clamp head 6 can be adjusted, so as to facilitate the docking of the plug valve 11 with the wellhead component clamp head 6.

[0054] A preferred embodiment: the longitudinal adjustment rod 10 is mainly composed of a connecting short section 10-1, a fixing ring 10-3, a plug valve fixing hoop 10-4 and a connecting seat 10-5. Both ends of the connecting short section 10-1 are provided with external threads and the rotation directions of the external threads at both ends are opposite. The upper end of the connecting short section 10-1 is threadedly connected to the connecting seat 10-5, and the lower end is threadedly connected to the fixing ring 10-3 provided with a plug valve fixing hoop 10-4.

[0055] A preferred embodiment: the outside of the main body of the connecting short section 10-1 is provided with an adjustment handle 10-2, which is convenient for rotation and longitudinal adjustment; the connecting seat 10-5 is provided with an internal thread and can be threadedly connected with the inner telescopic rod 9, and the plug valve fixing hoop 10-4 is provided with an internal thread and fixed at the lower end of the fixing ring 10-3. The internal thread of the plug valve fixing hoop 10-4 can be threadedly connected with the external thread of the plug valve 11, so that the connecting seat 10-5 with the plug valve 11 installed can adjust the lateral distance between the wellhead component clamp head 6 under the drive of the inner telescopic rod 9. The longitudinal distance between the plug valve 11 and the wellhead component clamp head 6 can be adjusted by rotating the connecting short section 10-1 through the adjustment handle 10-2.

[0056] The embodiments described above are only typical embodiments, but the utility model is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and enlightenment of the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the creative spirit and creative concept of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope is not limited to the above description.

Claims

1. A device for spraying oil wellhead, characterized in that: A rotatable fixing mechanism and a blowout prevention control mechanism are provided, wherein: an upper chuck and a lower chuck are provided in the rotatable fixing mechanism, a nut sleeve hole and a device fixing hole are provided in the upper chuck and the lower chuck, the upper chuck is connected to the rotating bracket through a connecting pin; the nut sleeve hole can be sleeved with the nut of the wellhead bolt in the large four-way flange, and the upper chuck and the lower chuck are fixed to the outside of the large four-way flange through the device fixing hole and bolts; The blowout prevention control mechanism is mainly composed of a longitudinal adjustment rod and a plug valve. The longitudinal adjustment rod is fixedly connected to the plug valve and is connected to the rotating bracket through a transverse telescopic rod.

2. A petroleum wellhead emergency spraying device as claimed in claim 1, characterized in that: The rotating bracket is an arc-shaped bracket, and a bracket placement plate is arranged between the lower part of the rotating bracket and the lower chuck. The upper chuck, the rotating bracket and the bracket placement plate are all connected through the connecting pin hole and the connecting pin therein.

3. A petroleum wellhead emergency spraying device as claimed in claim 2, characterized in that: The bracket placement plate is a semicircular disc-shaped body that matches the outer circle of the rotating bracket and the large four-way flange, and more than one connecting pin hole is arranged in the semicircular disc-shaped body; the connecting pin hole in the upper chuck is placed between the two device fixing holes.

4. A petroleum wellhead emergency spraying device as claimed in claim 3, characterized in that: The unfolded length of the rotating bracket is half of the unfolded length of the bracket placement plate, and connecting pin holes are provided at both ends.

5. The oil well head spraying device as claimed in claim 3, characterized in that: The upper chuck is a fan-shaped disc, and the nut sleeve hole, the device fixing hole and the connecting pin hole are arranged from the inside to the outside.

6. A petroleum well head spraying device as claimed in claim 2, characterized in that: The lower chuck is a fan-shaped disc and the outer edge disc body is provided with a clamping step higher than the inner edge disc body, the nut sleeve hole is arranged in the inner edge disc body of the lower chuck, and the device fixing hole is arranged in the clamping step of the lower chuck.

7. The oil well head spraying device as claimed in claim 1, characterized in that: The front end of the plug valve is connected to the spray clamp head through the outer thread of the valve body.

8. The oil well head spraying device as claimed in claim 1, characterized in that: The transverse telescopic rod is composed of an outer telescopic tube and an inner telescopic rod. The inner telescopic rod is installed in the outer telescopic tube. The inner telescopic rod and the outer telescopic tube are connected by threads. An adjustment square is arranged at the outer end of the inner telescopic rod.

9. The oil well head spraying device as claimed in claim 1, characterized in that: The longitudinal adjustment rod is mainly composed of a connecting short section, a fixing ring, a plug valve fixing hoop and a connecting seat. Both ends of the connecting short section are provided with external threads and the rotation directions of the external threads at both ends are opposite. The upper end of the connecting short section is threadedly connected to the connecting seat, and the lower end is threadedly connected to the fixing ring provided with a plug valve fixing hoop.

10. The oil well head spraying device as claimed in claim 9, characterized in that: The main body of the connecting short section is provided with an adjusting handle outside; the connecting seat is provided with an internal thread and can be threadedly connected with the inner telescopic rod; the plug valve fixing hoop is provided with an internal thread and fixed to the lower end of the fixing ring.

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