A self-sealing blowout-proof wellhead Christmas tree device

Abstract

The present invention relates to the technical field of Christmas trees, and discloses a self-sealing blowout-proof wellhead Christmas tree device, comprising a mounting frame, wherein a lifting threaded rod is rotatably connected in the mounting frame, wherein the outer surface of the lifting threaded rod is threadedly matched with a transmission plate, and the bottom of the transmission plate is fixedly connected with a plurality of shock-absorbing and damping telescopic rods. The self-sealing blowout-proof wellhead Christmas tree device is configured by inserting a wellhead oil outlet pipe into a mounting pipe on the Christmas tree, and then sealing and fixing the two together through a fixed connection mechanism, and then oil is transported to the Christmas tree through the wellhead oil outlet pipe, and then the self-sealing sealing mechanism in the mounting pipe is driven to work under the action of oil pressure, and the self-sealing sealing mechanism performs a tight and automatic sealing between the mounting pipe and the wellhead oil outlet pipe, thereby improving the sealing performance of the connection between the Christmas tree and the wellhead oil outlet pipe, further improving the stability of the Christmas tree after connection, and effectively preventing leakage and oil spraying at the connection caused by excessive oil outlet pressure.

Description

Technical Field

[0001] The invention relates to the technical field of Christmas trees, and in particular to a self-sealing blowout-proof wellhead Christmas tree device. Background Art

[0002] The Christmas tree is a wellhead device used to extract oil. It is one of the main equipment for controlling and regulating oil and gas production in oil and gas wells. The Christmas tree is located at the opening at the top of the oil well and is connected to the production pipeline and oil outlet pipeline downhole. The Christmas tree is an important barrier that isolates the top of the oil well from the external environment. The existing Christmas tree mainly includes the Christmas tree body, flanges, and valves used to regulate or prevent crude oil vapor, natural gas and liquid from gushing out of the well, such as production valves, wax removal valves, etc. In the crude oil production process, it is necessary to fix the installation pipe on the Christmas tree with the wellhead oil outlet pipe.

[0003] At present, during the installation of the Christmas tree, the flanges on the installation pipe and the wellhead oil outlet pipe are usually used for sealing and fixing the connection, and the sealing type is poor. After the connection, due to the high pressure of the oil outlet pipe from the wellhead, under the action of long-term pressure, the connection between the installation pipe and the wellhead oil outlet pipe will leak, resulting in oil spray leakage at the connection. At the same time, when the Christmas tree is connected and installed, due to the large size and heavy weight of the Christmas tree, multiple people are required to carry and align the Christmas tree before installation, or the Christmas tree is hoisted by hoisting equipment and then installed with the wellhead oil outlet pipe, which makes it inconvenient for the staff to install the Christmas tree and the installation efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a self-sealing blowout-proof wellhead Christmas tree device to solve the deficiencies in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A self-sealing blowout-proof wellhead Christmas tree device comprises a mounting frame, wherein a lifting threaded rod is rotatably connected inside the mounting frame, wherein the outer surface of the lifting threaded rod is threadedly matched with a transmission plate, wherein a plurality of shock-absorbing and damping telescopic rods are fixedly connected to the bottom of the transmission plate, wherein the bottom ends of the shock-absorbing and damping telescopic rods are fixedly connected to a connecting ring plate, wherein the inner surface of the connecting ring plate is fixedly connected to a Christmas tree body, and wherein the outer surface of the shock-absorbing and damping telescopic rod is fixedly sleeved with a spring fixedly connected to the connecting ring plate;

[0007] The outer surface of the lifting threaded rod is transmission-connected with a transmission mechanism connected to the mounting frame, and the transmission mechanism is used to drive the lifting threaded rod to rotate. The input end of the oil production tree body is fixedly connected with a mounting pipe, and a wellhead oil outlet pipe is slidably connected in the mounting pipe. A self-sealing sealing mechanism connected to the wellhead oil outlet pipe is arranged in the mounting pipe, and the self-sealing sealing mechanism is used to tightly seal between the mounting pipe and the wellhead oil outlet pipe. The bottom end of the mounting pipe is fixedly connected with a fixed connection mechanism connected to the wellhead oil outlet pipe, and the fixed connection mechanism is used to fixedly connect the mounting pipe and the wellhead oil outlet pipe.

[0008] As a further solution of the present invention: the self-sealing sealing mechanism includes two mounting ring plates fixedly connected to the mounting tube, the inner surface of the mounting ring plate is fixedly connected to a first rubber sealing ring, a transmission ring plate slidably connected to the mounting tube is arranged below the mounting ring plate, the top of the transmission ring plate is fixedly connected to a second rubber sealing ring, the outer surface of the second rubber sealing ring is beveled, a transmission circular plate is slidably connected inside the mounting tube, a plurality of filter ports are opened on the top of the transmission circular plate, a plurality of transmission rubber strips slidably connected to the mounting ring plate are fixedly connected to the bottom of the transmission circular plate, and the transmission rubber strips are fixedly connected to the transmission ring plate.

[0009] As a further solution of the present invention: a mounting plate is fixedly connected inside the mounting tube, a transmission shaft is rotatably connected to the mounting plate, a turbofan is fixedly sleeved on the outer surface of the transmission shaft, a mounting block is fixedly connected to the outer surface of the transmission shaft, and a plurality of crushing blades are fixedly connected to the outer surface of the mounting block.

[0010] As a further solution of the present invention: a push column is fixedly connected to the top of the transmission circular plate, a contact switch fixedly connected to the mounting tube is arranged above the push column, and an output end of the contact switch is electrically connected to an alarm fixedly connected to the mounting tube through an electric wire.

[0011] As a further solution of the present invention: the fixed connection mechanism includes a first flange highly connected to the mounting pipe, the outer surface of the wellhead oil outlet pipe is fixedly connected to a second flange, and the first flange and the second flange are fixedly connected to opposite sides with sealing gaskets.

[0012] As a further solution of the present invention: the transmission mechanism includes two transmission boxes fixedly connected to the mounting frame, the transmission box is rotatably connected to the lifting threaded rod, a first rotating shaft is rotatably connected in the transmission box, one end of the first rotating shaft is fixedly connected to a first bevel gear, the outer surface of the first bevel gear is meshingly connected to a second bevel gear fixedly sleeved with the lifting threaded rod, a transmission motor is fixedly connected to the mounting frame, the output end of the transmission motor is fixedly connected to the second rotating shaft via a coupling, and the second rotating shaft is connected to the outer surface of the first rotating shaft via a transmission wheel and a transmission belt.

[0013] As a further solution of the present invention: a universal wheel is fixedly connected to the bottom of the mounting frame.

[0014] As a further solution of the present invention: the mounting frame is internally threaded with a plurality of fixing bolts, the bottoms of the fixing bolts are fixedly connected with a fixing support plate, and the fixing support plate is provided with a plurality of fixing holes.

[0015] Beneficial effects of the present invention:

[0016] (1) The wellhead oil outlet pipe is inserted into the installation pipe on the Christmas tree, and then the two are sealed and fixedly connected by a fixed connection mechanism. Then, oil is transported to the Christmas tree through the wellhead oil outlet pipe. Then, the self-sealing sealing mechanism in the installation pipe is driven to work under the action of oil pressure. The self-sealing sealing mechanism automatically and tightly seals the installation pipe and the wellhead oil outlet pipe, thereby improving the sealing performance of the connection between the Christmas tree and the wellhead oil outlet pipe, further improving the stability of the Christmas tree after connection, and effectively preventing leakage and oil spraying at the connection caused by excessive oil pressure.

[0017] (2) The oil entering the installation pipe is filtered by the transmission disc on the self-sealing sealing mechanism, and larger impurities in the oil are filtered to prevent larger impurities from causing pipeline blockage or internal damage to the valve, thereby filtering the oil and reducing the damage of impurities to the Christmas tree. At the same time, the turbofan and the transmission shaft are driven to rotate during the oil intake process, and the transmission shaft drives the installation block and the crushing blade to rotate. The crushing blade crushes the larger impurities into smaller impurities so that they do not affect the normal operation of the Christmas tree. At the same time, the transmission disc is prevented from being blocked, thereby realizing automatic filtering of impurities in the oil and automatically cleaning the filtered impurities, thereby improving the stability and practicality of the Christmas tree.

[0018] (3) When larger impurities cannot be crushed, the filter port on the transmission disc is blocked. At this time, the transmission disc will continue to move upward due to greater resistance. At this time, the transmission rubber strip will be pulled to undergo a greater tensile deformation, and the driving column on the transmission disc will move upward. At this time, the driving column begins to press against the contact switch, triggering the contact switch, thereby driving the alarm to sound an alarm, promptly reminding the staff to carry out timely maintenance, thereby effectively preventing the risk of pipeline blockage.

[0019] (4) The mounting frame is moved to the top of the wellhead outlet pipe, and then the lifting threaded rod is driven to rotate by the transmission mechanism. The lifting threaded rod drives the transmission plate, the shock-absorbing and damping telescopic rod, the connecting ring plate and the main body of the Christmas tree to move downward, so that the wellhead outlet pipe is inserted into the mounting pipe. Then, the mounting pipe is fixedly connected to the wellhead outlet pipe by the fixed connecting mechanism. After the connection, the pressure of the oil flowing out of the wellhead outlet pipe drives the self-sealing sealing mechanism to seal the mounting pipe and the wellhead outlet pipe, thereby realizing the portable installation of the Christmas tree without manual handling and docking, which greatly improves the installation efficiency of the Christmas tree. At the same time, the mounting frame is fixed after installation. Then, when the oil pressure is unstable when the wellhead outlet pipe is flowing out, the Christmas tree is driven to vibrate up and down. At this time, the vibration is buffered by the expansion and contraction of the shock-absorbing and damping telescopic rod and the spring, so as to prevent the long-term vibration from causing the bolts connecting the Christmas tree and the wellhead outlet pipe and other connecting bolts on the Christmas tree to loosen, effectively reducing the impact of vibration on the Christmas tree and improving the stability of the Christmas tree after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is several first stereoscopic views of the exterior of the present invention;

[0022] Figure 2 is a second stereoscopic diagram of the external structure of the present invention;

[0023] Figure 3 is a first stereogram of the internal structure of the present invention;

[0024] Figure 4 is a second stereoscopic view of the internal structure of the present invention;

[0025] Figure 5 It is a front view of the internal structure of the transmission box of the present invention;

[0026] Figure 6 The present invention Figure 1 A magnified view of middle;

[0027] Figure 7 The present invention Figure 3 Enlarged view of middle B;

[0028] Figure 8 The present invention Figure 4 Enlarged view of C in the middle.

[0029] In the figure: 1, mounting frame; 2, lifting threaded rod; 3, transmission plate; 4, shock-absorbing and damping telescopic rod; 5, connecting ring plate; 6, Christmas tree body; 7, mounting pipe; 8, wellhead oil outlet pipe; 9, spring; 11, mounting ring plate; 12, first rubber sealing ring; 13, transmission ring plate; 14, second rubber sealing ring; 15, transmission circular plate; 16, filter port; 17, transmission rubber strip; 21, mounting plate; 22, transmission shaft; 23, turbofan; 24, mounting block; 25, crushing blade; 31, push column; 32, contact switch; 33, alarm; 41, first flange; 42, second flange; 43, sealing pad; 51, transmission box; 52, first rotating shaft; 53, first bevel gear; 54, second bevel gear; 55, transmission motor; 56, second rotating shaft; 61, universal wheel; 71, fixing bolt; 72, fixing support plate; 73, fixing hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0031] See also Figure 1-Figure 8 As shown, the present invention is a self-sealing blowout-proof wellhead Christmas tree device, a self-sealing blowout-proof wellhead Christmas tree device, comprising a mounting frame 1, a lifting threaded rod 2 is rotatably connected inside the mounting frame 1, a transmission plate 3 is threadedly matched with the outer surface of the lifting threaded rod 2, a plurality of shock-absorbing and damping telescopic rods 4 are fixedly connected to the bottom of the transmission plate 3, a connecting ring plate 5 is fixedly connected to the bottom end of the shock-absorbing and damping telescopic rod 4, a Christmas tree body 6 is fixedly connected to the inner surface of the connecting ring plate 5, and a spring 9 fixedly connected to the connecting ring plate 5 is fixedly sleeved on the outer surface of the shock-absorbing and damping telescopic rod 4;

[0032] The outer surface of the lifting threaded rod 2 is transmission-connected with a transmission mechanism connected to the mounting frame 1, and the transmission mechanism is used to drive the lifting threaded rod 2 to rotate. The input end of the oil production tree body 6 is fixedly connected with a mounting tube 7, and a wellhead oil outlet pipe 8 is slidingly connected inside the mounting tube 7. A self-sealing sealing mechanism connected to the wellhead oil outlet pipe 8 is arranged inside the mounting tube 7. The self-sealing sealing mechanism is used to tightly seal between the mounting tube 7 and the wellhead oil outlet pipe 8. The bottom end of the mounting tube 7 is fixedly connected with a fixed connection mechanism connected to the wellhead oil outlet pipe 8, and the fixed connection mechanism is used to fix the mounting tube 7 and the wellhead oil outlet pipe 8.

[0033] The transmission mechanism includes two transmission boxes 51 fixedly connected to the mounting frame 1, the transmission box 51 is rotatably connected to the lifting threaded rod 2, a first rotating shaft 52 is rotatably connected in the transmission box 51, one end of the first rotating shaft 52 is fixedly connected to a first bevel gear 53, the outer surface of the first bevel gear 53 is meshedly connected to a second bevel gear 54 fixedly sleeved with the lifting threaded rod 2, a transmission motor 55 is fixedly connected to the mounting frame 1, the transmission motor 55 is controlled by a PLC programming program, and the transmission motor 55 can be controlled to rotate forward and backward and the rotation angle, the output end of the transmission motor 55 is fixedly connected to the second rotating shaft 56 through a coupling, and the second rotating shaft 56 is connected to the outer surface of the first rotating shaft 52 through a transmission wheel and a transmission belt.

[0034] The fixed connection mechanism includes a first flange 41 highly connected to the mounting pipe 7 , a second flange 42 is fixedly connected to the outer surface of the wellhead oil outlet pipe 8 , and sealing gaskets 43 are fixedly connected to the opposite sides of the first flange 41 and the second flange 42 .

[0035] The first flange 41 and the second flange 42 are fixedly connected by bolts, and the sealing gasket 43 is used to squeeze and seal during the connection, so that the installation pipe 7 and the wellhead production pipe 8 are tightly connected.

[0036] The second rotating shaft 56 is driven to rotate by the transmission motor 55 , and the second rotating shaft 56 drives the first rotating shaft 52 to rotate through the transmission wheel and the transmission belt. The first rotating shaft 52 drives the lifting threaded rod 2 to rotate through the first bevel gear 53 and the second bevel gear 54 .

[0037] A universal wheel 61 is fixedly connected to the bottom of the mounting frame 1 .

[0038] The universal wheels 61 facilitate movement of the mounting bracket 1 .

[0039] The mounting frame 1 is internally threaded with a plurality of fixing bolts 71 , the bottom of the fixing bolts 71 is fixedly connected with a fixing support plate 72 , and the fixing support plate 72 is provided with a plurality of fixing holes 73 .

[0040] After the Christmas tree in the mounting frame 1 is fixedly mounted to the wellhead oil outlet pipe 8, the fixing bolts 71 are then rotated, and the fixing bolts 71 drive the fixing support plate 72 to move downward, so that the fixing support plate 72 contacts the ground, and then the fixing nails are inserted into the fixing holes 73 on the fixing support plate 72, and the fixing support plate 72 is fixedly connected by the fixing nails, thereby achieving the fixing connection of the mounting frame 1.

[0041] By moving the mounting frame 1 to the top of the wellhead oil outlet pipe 8, and then driving the lifting threaded rod 2 to rotate through the transmission mechanism, the lifting threaded rod 2 drives the transmission plate 3, the shock-absorbing and damping telescopic rod 4, the connecting ring plate 5 and the oil production tree body 6 to move downward, so that the wellhead oil outlet pipe 8 is inserted into the mounting pipe 7, and then the mounting pipe 7 is fixedly connected to the wellhead oil outlet pipe 8 through the fixed connection mechanism. After the connection, the pressure of the oil outlet from the wellhead oil outlet pipe drives the self-sealing sealing mechanism to seal the mounting pipe 7 and the wellhead oil outlet pipe 8, thereby realizing the portable installation of the oil production tree, without the need for manual handling and docking, and greatly improving the installation efficiency of the oil production tree. At the same time, after the installation, the self-sealing sealing mechanism cooperates to self-seal the connected mounting pipe 7 and the wellhead oil outlet pipe 8, which greatly improves the sealing between the oil production tree and the wellhead oil outlet pipe 8 after installation, and effectively reduces the risk of leakage at the connection. After fixed installation, by rotating the fixing bolt 71, the fixing bolt 71 drives the fixing support plate 72 to move downward, so that the fixing support plate 72 contacts the ground, and then the fixing nail is inserted into the fixing hole 73 on the fixing support plate 72, and the fixing nail is used to fix the fixing support plate 72. The fixing connection of the mounting frame 1 is realized. When the oil pressure of the wellhead oil outlet pipe 8 is unstable, the large oil pressure will impact the Christmas tree, and the Christmas tree will vibrate up and down. At this time, the vibration is buffered by the expansion and contraction of the shock-absorbing and damping telescopic rod 4 and the spring 9, preventing the long-term vibration from causing the bolts connecting the Christmas tree and the wellhead oil outlet pipe 8 and other connecting bolts on the Christmas tree to loosen, effectively reducing the impact of vibration on the Christmas tree and improving the stability of the Christmas tree after installation. Example

[0042] Based on Example 1, please refer to Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the self-sealing sealing mechanism includes two mounting ring plates 11 fixedly connected to the mounting tube 7, the inner surface of the mounting ring plate 11 is fixedly connected to a first rubber sealing ring 12, a transmission ring plate 13 slidably connected to the mounting tube 7 is arranged below the mounting ring plate 11, a second rubber sealing ring 14 is fixedly connected to the top of the transmission ring plate 13, and the outer surface of the second rubber sealing ring 14 is beveled, a transmission circular plate 15 is slidably connected inside the mounting tube 7, a plurality of filter ports 16 are provided on the top of the transmission circular plate 15, a plurality of transmission rubber strips 17 slidably connected to the mounting ring plate 11 are fixedly connected to the bottom of the transmission circular plate 15, and the transmission rubber strips 17 are fixedly connected to the transmission ring plate 13.

[0043] By inserting the wellhead oil outlet pipe 8 into the installation pipe 7, and then sealing and fixing the installation pipe 7 and the wellhead oil outlet pipe 8 through the fixed connection mechanism, the wellhead oil outlet pipe 8 then discharges oil from the installation pipe 7, and then the oil enters the transmission circular plate 15, and flows out through the filter port 16 on the transmission circular plate 15. Since the oil has a certain speed when flowing, the transmission circular plate 15 blocks the flow of oil at this time, and at this time, the transmission circular plate 15 is driven to move upward under the damping effect, and the transmission circular plate 15 drives the transmission ring plate 13 to move upward through the transmission rubber strip 17, and the transmission ring plate 13 drives the second rubber sealing ring 14 to move upward, and at this time, the second rubber sealing ring 14 is inserted into the gap between the first rubber sealing ring 12 and the wellhead oil outlet pipe 8. Due to the chamfered design of the outer surface of the second rubber sealing ring 14, the second rubber sealing ring 14 squeezes the first rubber sealing ring 12 during the insertion process. The first rubber sealing ring 12 squeezes the second rubber sealing ring 14 under the action of the interaction force, so that the second rubber sealing ring 14 is tightly squeezed on the surface of the wellhead oil outlet pipe 8, thereby achieving the sealing between the installation pipe 7 and the wellhead oil outlet pipe 8. At the same time, as the pressure of the wellhead oil outlet increases, the first rubber sealing ring 12 is driven to squeeze the second rubber sealing ring 14 more, and the sealing is stronger, thereby achieving a self-sealing tight connection between the installation pipe 7 and the wellhead oil outlet pipe 8, greatly improving the stability of the Christmas tree after connection, effectively preventing the connection from leaking and spraying due to excessive oil outlet pressure, and filtering larger impurities in the oil through the filter port 16 on the transmission circular plate 15 to prevent larger impurities from causing pipeline blockage or internal damage to the valve, thereby filtering the oil, reducing the damage of the impurities to the Christmas tree, and further improving the stability of the Christmas tree. Example

[0044] Based on Example 2, please refer to Figure 1 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, a mounting plate 21 is fixedly connected inside the mounting tube 7, a transmission shaft 22 is rotatably connected to the mounting plate 21, a turbofan 23 is fixedly sleeved on the outer surface of the transmission shaft 22, a mounting block 24 is fixedly connected to the outer surface of the transmission shaft 22, and a plurality of crushing blades 25 are fixedly connected to the outer surface of the mounting block 24.

[0045] When the wellhead oil outlet pipe 8 supplies oil to the installation pipe 7, the oil flows upward, driving the turbofan 23 on the transmission shaft 22 to rotate, the turbofan 23 drives the transmission shaft 22 to rotate, the transmission shaft 22 drives the installation block 24 and the crushing blade 25 to rotate, the crushing blade 25 crushes the larger impurities to be filtered into smaller impurities, so that they do not affect the normal operation of the oil tree, and prevents the transmission circular plate 15 from being blocked, thereby realizing automatic filtering of impurities in the oil and automatic cleaning of the filtered impurities, thereby improving the stability and practicality of the collection tree.

[0046] A push column 31 is fixedly connected to the top of the transmission circular plate 15, and a contact switch 32 fixedly connected to the mounting tube 7 is arranged above the push column 31. The output end of the contact switch 32 is electrically connected to an alarm 33 fixedly connected to the mounting tube 7 through an electric wire.

[0047] When larger impurities cannot be crushed, the filter port 16 on the transmission disc 15 is blocked. At this time, the transmission disc 15 will continue to move upward due to greater resistance, and the transmission rubber strip 17 will be pulled to undergo a greater tensile deformation. The driving column 31 on the transmission disc 15 will move upward. At this time, the pushing column 31 begins to abut against the contact switch 32, triggering the contact switch 32, thereby driving the alarm 33 to sound an alarm, promptly reminding the staff to carry out timely maintenance, thereby effectively preventing the risk of pipeline blockage.

[0048] The working principle of the present invention is as follows: the wellhead oil outlet pipe 8 is inserted into the mounting pipe 7, and then the mounting pipe 7 and the wellhead oil outlet pipe 8 are sealed and fixedly connected through a fixed connection mechanism, and then the wellhead oil outlet pipe 8 discharges oil from the mounting pipe 7, and then the oil enters the transmission circular plate 15, and flows out through the filter port 16 on the transmission circular plate 15. Since the oil has a certain speed when flowing, the transmission circular plate 15 blocks the flow of oil at this time, and at this time, the transmission circular plate 15 is driven to move upward under the damping effect, and the transmission circular plate 15 drives the transmission ring plate 13 to move upward through the transmission rubber strip 17, and the transmission ring plate 13 drives the second rubber sealing ring 14 to move upward, and at this time, the second rubber sealing ring 14 is inserted into the gap between the first rubber sealing ring 12 and the wellhead oil outlet pipe 8. Due to the chamfered design of the outer surface of the second rubber sealing ring 14, the second rubber sealing ring 14 is inserted into the gap between the first rubber sealing ring 12 and the wellhead oil outlet pipe 8. During the process, the first rubber sealing ring 12 is squeezed, and at the same time, under the action of the interaction force, the first rubber sealing ring 12 squeezes the second rubber sealing ring 14, so that the second rubber sealing ring 14 is tightly squeezed on the surface of the wellhead oil outlet pipe 8, thereby achieving the sealing between the installation pipe 7 and the wellhead oil outlet pipe 8. At the same time, as the pressure of the wellhead oil outlet increases, the first rubber sealing ring 12 is driven to squeeze the second rubber sealing ring 14 more, and the sealing is stronger, thereby achieving a self-sealing tight connection between the installation pipe 7 and the wellhead oil outlet pipe 8, greatly improving the stability of the Christmas tree after connection, effectively preventing the connection from leaking and spraying due to excessive oil outlet pressure, and filtering larger impurities in the oil through the filter port 16 on the transmission circular plate 15 to prevent larger impurities from causing pipeline blockage or internal damage to the valve, thereby filtering the oil, reducing the damage of the impurities to the Christmas tree, and further improving the stability of the Christmas tree.

[0049] When the wellhead oil outlet pipe 8 supplies oil to the installation pipe 7, the oil flows upward, driving the turbofan 23 on the transmission shaft 22 to rotate, the turbofan 23 drives the transmission shaft 22 to rotate, the transmission shaft 22 drives the installation block 24 and the crushing blade 25 to rotate, the crushing blade 25 crushes the larger impurities to be filtered into smaller impurities, so that they do not affect the normal operation of the oil tree, and prevents the transmission circular plate 15 from being blocked, thereby realizing automatic filtering of impurities in the oil and automatic cleaning of the filtered impurities, thereby improving the stability and practicality of the collection tree.

[0050] A push column 31 is fixedly connected to the top of the transmission circular plate 15, and a contact switch 32 fixedly connected to the mounting tube 7 is arranged above the push column 31. The output end of the contact switch 32 is electrically connected to an alarm 33 fixedly connected to the mounting tube 7 through an electric wire.

[0051] When larger impurities cannot be crushed, the filter port 16 on the transmission disc 15 is blocked. At this time, the transmission disc 15 will continue to move upward due to greater resistance, and the transmission rubber strip 17 will be pulled to undergo a greater tensile deformation. The driving column 31 on the transmission disc 15 will move upward. At this time, the pushing column 31 begins to abut against the contact switch 32, triggering the contact switch 32, thereby driving the alarm 33 to sound an alarm, promptly reminding the staff to carry out timely maintenance, thereby effectively preventing the risk of pipeline blockage.

[0052] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A self-sealing blowout-proof wellhead Christmas tree device, comprising a mounting frame (1), characterized in that: A lifting threaded rod (2) is rotatably connected inside the mounting frame (1); a transmission plate (3) is threadedly matched on the outer surface of the lifting threaded rod (2); a plurality of shock-absorbing and damping telescopic rods (4) are fixedly connected to the bottom of the transmission plate (3); a connecting ring plate (5) is fixedly connected to the bottom end of the shock-absorbing and damping telescopic rod (4); a Christmas tree body (6) is fixedly connected to the inner surface of the connecting ring plate (5); and a spring (9) fixedly connected to the connecting ring plate (5) is fixedly sleeved on the outer surface of the shock-absorbing and damping telescopic rod (4); The outer surface of the lifting threaded rod (2) is transmission-connected with a transmission mechanism connected to the mounting frame (1), and the transmission mechanism is used to drive the lifting threaded rod (2) to rotate; the input end of the Christmas tree body (6) is fixedly connected with a mounting pipe (7), and a wellhead oil outlet pipe (8) is slidably connected inside the mounting pipe (7); a self-sealing sealing mechanism connected to the wellhead oil outlet pipe (8) is arranged inside the mounting pipe (7), and the self-sealing sealing mechanism is used to tightly seal between the mounting pipe (7) and the wellhead oil outlet pipe (8); the bottom end of the mounting pipe (7) is fixedly connected with a fixed connection mechanism connected to the wellhead oil outlet pipe (8), and the fixed connection mechanism is used to fixedly connect the mounting pipe (7) and the wellhead oil outlet pipe (8); The self-sealing sealing mechanism comprises two mounting ring plates (11) fixedly connected to the mounting tube (7); a first rubber sealing ring (12) is fixedly connected to the inner surface of the mounting ring plate (11); a transmission ring plate (13) slidably connected to the mounting tube (7) is arranged below the mounting ring plate (11); a second rubber sealing ring (14) is fixedly connected to the top of the transmission ring plate (13); the outer surface of the second rubber sealing ring (14) is beveled; a transmission circular plate (15) is slidably connected inside the mounting tube (7); a plurality of filter ports (16) are provided on the top of the transmission circular plate (15); a plurality of transmission rubber strips (17) slidably connected to the mounting ring plate (11) are fixedly connected to the bottom of the transmission circular plate (15); the transmission rubber strips (17) are fixedly connected to the transmission ring plate (13).

2. A self-sealing blowout-proof wellhead Christmas tree device according to claim 1, characterized in that: A mounting plate (21) is fixedly connected inside the mounting tube (7), a transmission shaft (22) is rotatably connected to the mounting plate (21), a turbofan (23) is fixedly sleeved on the outer surface of the transmission shaft (22), a mounting block (24) is fixedly connected to the outer surface of the transmission shaft (22), and a plurality of crushing blades (25) are fixedly connected to the outer surface of the mounting block (24).

3. A self-sealing blowout-proof wellhead Christmas tree device according to claim 1, characterized in that: A push column (31) is fixedly connected to the top of the transmission circular plate (15), a contact switch (32) fixedly connected to the mounting tube (7) is arranged above the push column (31), and an output end of the contact switch (32) is electrically connected to an alarm (33) fixedly connected to the mounting tube (7) via an electric wire.

4. A self-sealing blowout-proof wellhead Christmas tree device according to claim 1, characterized in that: The fixed connection mechanism comprises a first flange (41) which is highly connected to the mounting pipe (7); a second flange (42) is fixedly connected to the outer surface of the wellhead oil outlet pipe (8); and sealing gaskets (43) are fixedly connected to opposite sides of the first flange (41) and the second flange (42).

5. The self-sealing blowout-proof wellhead Christmas tree device according to claim 1, characterized in that: The transmission mechanism comprises two transmission boxes (51) fixedly connected to the mounting frame (1), the transmission boxes (51) being rotationally connected to the lifting threaded rod (2), a first rotating shaft (52) being rotationally connected inside the transmission box (51), one end of the first rotating shaft (52) being fixedly connected to a first bevel gear (53), an outer surface of the first bevel gear (53) being meshingly connected to a second bevel gear (54) fixedly sleeved on the lifting threaded rod (2), a transmission motor (55) being fixedly connected to the mounting frame (1), an output end of the transmission motor (55) being fixedly connected to a second rotating shaft (56) via a coupling, and the second rotating shaft (56) being transmission-connected to the outer surface of the first rotating shaft (52) via a transmission wheel and a transmission belt.

6. The self-sealing blowout-proof wellhead Christmas tree device according to claim 1, characterized in that: A universal wheel (61) is fixedly connected to the bottom of the mounting frame (1).

7. The self-sealing blowout-proof wellhead Christmas tree device according to claim 1, characterized in that: The mounting frame (1) is internally threadedly connected to a plurality of fixing bolts (71), the bottoms of the fixing bolts (71) are fixedly connected to a fixing support plate (72), and the fixing support plate (72) is provided with a plurality of fixing holes (73).

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