Wellhead sealing device of pumping well

Abstract

The utility model discloses a pumping well mouth sealing device which comprises a supporting mechanism, the supporting mechanism comprises a sealing sleeve, a plurality of dispatching holes are sequentially formed in the surface of the top of the sealing sleeve, the dispatching holes are connected with a pipe opening in a fastening mode through fastening screws, and the top end of a guide pipe is communicated with a fastening screw. The top surface of the guide pipe is sequentially provided with a plurality of triangular blocking pieces, the top ends of the triangular blocking pieces are connected with conical pipe connectors in a sleeved mode, and two oil sealing modes are adopted, one mode is that overturning of the sealing cover is adjusted through the adjusting motor, plugging of an oil well opening is changed according to needs, and the triangular blocking pieces and the conical pipe connectors are adopted to achieve well opening sealing; the adjusting screw and the disc face of the pipe connecting disc are adopted to complete communication and connection of pipe openings, oil liquid is conveyed according to the connecting pipe, the oil liquid transferring efficiency is improved, and regional oil pipe blockage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of oil well development technology, specifically to a wellhead sealing device for oil wells. Background Technology

[0002] An oil well is a hole drilled using drilling methods. Generally, after drilling to the oil layer, an oil layer casing is run into the well, and oil well cement is injected into the annular space between the casing and the well wall to maintain the well wall and seal the oil, gas, and water layers. Then, according to the requirements of oilfield development, a perforating gun is used to open the oil layer, forming a channel. A tubing is then run into the well, and an appropriate flow-inducing method is used to raise the oil from the bottom of the well to the wellhead.

[0003] Patent application number CN201821746747.1 discloses a wellhead sealing box packing filling tool for oil wells. This utility model is a tool for quickly adding sealing packing to the wellhead sealing box of oil wells in the petroleum industry, and is easy to operate. The packing filling tool includes a support, a threaded protective sleeve, a connecting fork, and a connecting rod. The connecting fork is connected to the support via the connecting rod, and the fork body is bolted to the packing pressure plate. The support sits on the outer platform of the wellhead sealing box, and the threaded protective sleeve is placed inside the support and threadedly connected to the wellhead sealing box. The packing pressure plate can be inserted into the wellhead sealing box through the threaded protective sleeve. This tool has a simple structure, low processing cost, and is easy to use. It eliminates the need for hammering or axeing, preventing injury to workers' hands and bodies, and avoiding damage to the polished rod. It can quickly add packing to the wellhead sealing box, and the packing inside the sealing box is compacted, effectively improving the sealing effect between the sealing box and the polished rod.

[0004] Traditional oil wells have poor sealing at the ends, which can lead to poor adjustability of the wellhead and make it impossible to adjust the sealing characteristics of the wellhead according to actual needs. Furthermore, the sealing characteristics between the upper and lower ends are not good. Utility Model Content

[0005] The purpose of this invention is to provide a sealing device for the wellhead of an oil well.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wellhead sealing device for oil wells, comprising a support mechanism, the support mechanism comprising a sealing sleeve, the top surface of the sealing sleeve having a plurality of adjustment holes sequentially formed, the plurality of adjustment holes being fastened to the pipe opening by fastening screws, a guide pipe being fitted at the middle of the top end of the sealing sleeve, the top surface of the guide pipe having a plurality of triangular baffles sequentially formed, and a tapered pipe head being fitted at the top end of the triangular baffles;

[0007] An adjusting motor is installed on the side wall of the sealing sleeve, and the output end of the adjusting motor is driven and hinged to the cap embedded in the sealing sleeve.

[0008] As a preferred embodiment of this utility model: an adjustment mechanism is installed at the top of the tapered connector, the adjustment mechanism includes an adjustment screw, a transfer oil pipe is connected to the top of the tapered connector, a pipe fitting plate is provided at the top of the transfer oil pipe, a connecting pipe sleeve is installed at the top of the pipe fitting plate, and a pipe fitting sleeve is provided at the end of the connecting pipe sleeve.

[0009] As a preferred embodiment of this utility model: an access sleeve is installed at the end of the connecting sleeve, and an oil discharge mechanism is provided at the top of the access sleeve;

[0010] The oil discharge mechanism includes a cross-shaped sealing tube disposed at the top of the inlet sleeve. A valve seat is installed on the front surface of the cross-shaped sealing tube. The end of the valve seat is connected to a sleeve, and a gas connection valve is provided at the top of the sleeve.

[0011] As a preferred embodiment of this utility model: an access sleeve is installed at the middle of the top of the air valve, a valve stem is provided at the end of the access sleeve, a connecting rod for cross-shaped intersection is provided at the top of the valve stem, and a connecting sleeve is provided at the middle of the top of the connecting rod.

[0012] As a preferred embodiment of this utility model: the top end of the connecting sleeve is provided with a square box, the end side wall of the square box is connected to an adjusting valve rod, the end of the adjusting valve rod is connected to a sleeve rod, and the end of the sleeve rod is provided with a fastening valve.

[0013] As a preferred embodiment of this utility model, the side wall end of the square box is provided with an access sleeve.

[0014] As a preferred embodiment of this utility model: a connecting mechanism is installed at the top of the square box.

[0015] The connecting mechanism includes an access base installed at the top of the square box, a pressure regulating valve at the top of the access base, a detector at the top of the valve head of the pressure regulating valve, a drain valve at the end of the access base, an adjusting base installed at the top of the drain valve, and a pipe connection valve installed at the top of the adjusting base.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1) Two sealing methods are adopted. One is to use the adjusting motor to adjust the flipping of the sealing cover and change the sealing of the wellhead according to the needs. The triangular baffle and conical pipe head are used to achieve wellhead sealing. The adjusting screw and the plate of the pipe connection are used to achieve transfer. The oil is transferred according to the connecting pipe, which improves the oil transfer and delivery speed.

[0018] 2) The gas-connecting valve cross seal tank, connecting sleeve, and multi-directional oil delivery are adopted to avoid relying on a single independent oil outlet, thus reducing the risk of oil leakage and preventing sludge accumulation. The square box and connecting sleeve allow the oil to be injected into the connecting sleeve from the square box to achieve gas transfer. The rod structure of the regulating valve stem seals the other end of the liquid outlet. The pipe-connecting valve and regulating base change the desired oil outlet pressure according to the oil speed. Attached Figure Description

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model;

[0021] Figure 3 This is a structural view of the detector of this utility model;

[0022] Figure 4 This is a schematic diagram of the adjusting motor structure of this utility model;

[0023] Figure 5 This is a structural view of the guide tube of this utility model.

[0024] In the diagram: 1. Support mechanism; 11. Sealing sleeve; 12. Adjustment hole; 13. Guide tube; 14. Fastening screw; 15. Triangular baffle; 16. Conical connector head; 17. Adjusting motor; 18. Cover;

[0025] 2. Adjusting mechanism; 21. Adjusting screw; 22. Transfer oil pipe; 23. Pipe connector; 25. Connecting sleeve; 26. Pipe sleeve; 27. Connecting sleeve;

[0026] 3. Oil discharge mechanism; 31. Cross seal pipe; 32. Air valve seat; 33. Pipe sleeve; 34. Air connection valve; 35. Inlet pipe sleeve; 36. Valve stem; 37. Connecting rod; 38. Connecting sleeve; 39. Square box; 391. Adjusting valve stem; 392. Sleeve rod; 393. Fastening valve; 394. Inlet sleeve;

[0027] 4. Connecting mechanism; 41. Connecting base; 42. Pressure regulating valve; 43. Detector; 44. Drain valve; 45. Adjusting base; 46. Pipe connection valve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 5 This utility model provides a technical solution:

[0030] A wellhead sealing device for an oil well includes a support mechanism 1. The support mechanism 1 includes a sealing sleeve 11. A plurality of adjustment holes 12 are sequentially opened on the top surface of the sealing sleeve 11. The plurality of adjustment holes 12 are fastened to the pipe opening by fastening screws 14. A guide pipe 13 is sleeved in the middle of the top end of the sealing sleeve 11. A plurality of triangular baffles 15 are sequentially provided on the top surface of the guide pipe 13. A tapered pipe head 16 is sleeved on the top end of the triangular baffles 15.

[0031] An adjusting motor 17 is installed on the side wall of the sealing sleeve 11, and the output end of the adjusting motor 17 is connected to the cap 18 embedded in the sealing sleeve 11 via a transmission hinge.

[0032] In this embodiment: an adjustment mechanism 2 is installed at the top of the tapered connector 16. The adjustment mechanism 2 includes an adjustment screw 21. The top of the tapered connector 16 is connected to a transfer oil pipe 22. The top of the transfer oil pipe 22 is provided with a pipe fitting plate 23. The top of the pipe fitting plate 23 is provided with a connecting pipe sleeve 25. The end of the connecting pipe sleeve 25 is provided with a pipe fitting sleeve 26.

[0033] The transfer oil pipe 22 and pipe sleeve 26 are mainly used to transfer and transport the liquid from the end of the transfer oil pipe 22 when the oil is transferred.

[0034] In this embodiment: an access sleeve 27 is installed at the end of the connecting sleeve 25, and an oil discharge mechanism 3 is provided at the top of the access sleeve 27;

[0035] The oil discharge mechanism 3 includes a cross-shaped sealing tube 31 installed at the top of the inlet sleeve 27. A valve seat 32 is installed on the front surface of the cross-shaped sealing tube 31. The end of the valve seat 32 is connected to a sleeve 33. A gas connection valve 34 is provided at the top of the sleeve 33.

[0036] The air valve seat 32 and the sleeve 33 are used. The sleeve 33 is used to detect the pressure inside the air valve seat 32 by the air valve 34.

[0037] In this embodiment: an access sleeve 35 is installed at the middle of the top of the air valve 34, a valve stem 36 is provided at the end of the access sleeve 35, a connecting rod 37 for cross-shaped connection is provided at the top of the valve stem 36, and a connecting sleeve 38 is provided at the middle of the top of the connecting rod 37.

[0038] The connecting rod 37 and the connecting sleeve 38 are used to transfer the gas connection structure.

[0039] In this embodiment: a square box 39 is provided at the top of the connecting sleeve 38, an adjusting valve rod 391 is connected to the end side wall of the square box 39, a sleeve rod 392 is connected to the end of the adjusting valve rod 391, and a fastening valve 393 is provided at the end of the sleeve rod 392.

[0040] The valve body configuration of the sleeve rod 392 and the fastening valve 393 facilitates liquid transfer.

[0041] In this embodiment: the side wall end of the square box 39 is provided with an access sleeve 394.

[0042] The 394 access sleeve is used to facilitate the classified transfer of oil.

[0043] In this embodiment: A connecting mechanism 4 is installed at the top of the square box 39.

[0044] The connecting mechanism 4 includes an access base 41 installed at the top of the square box 39. A pressure regulating valve 42 is provided at the top of the access base 41. A detector 43 is provided at the top of the valve head of the pressure regulating valve 42. A drain valve 44 is provided at the end of the access base 41. An adjusting base 45 is installed at the top of the drain valve 44. A pipe connection valve 46 is installed at the top of the adjusting base 45.

[0045] The detector 43 used changes the position of the adjustment base 45.

[0046] In practical use: Step 1: Connect to the wellhead;

[0047] During installation, the regulating motor 17 is started to drive the in-situ rotation of the cover 18. Based on the liquid connected to the sealing sleeve 11 and the guide pipe 13, the liquid substance is transferred from here. The deflection position of the cover 18 is changed, and the weight is distributed according to the scheduling hole 12 and the triangular baffle 15 at the top. The tapered pipe head 16 is used to connect and gather the pipes, so as to realize the connection between the oil well and the external delivery pipe.

[0048] Step 2: Connecting the well casing;

[0049] The connection is achieved by using one end of the connecting sleeve 25, and the oil is transferred through the connecting sleeve 26. The oil is transported and extracted from underground. The connecting sleeves 26 on both sides of the connecting sleeve 25 are used to disperse the transfer, ensuring that the air pressure in the valve body is within a suitable range and avoiding leakage or hidden leakage. Therefore, the valve body of the gas valve 34 is connected, and the wellhead is produced through the connecting sleeve 394. The air pressure is sensed by the connecting sleeve 38 and the regulating valve rod 391, which serve as the oil transportation channel. The oil is transported through the connecting sleeve 394.

[0050] Step 2: Additional well pipe connection control;

[0051] First, by utilizing the connection between the valve bodies of the drain valve 44 and the pipe connection valve 46, the oil well pipe connection is achieved based on the connection of the adjusting base 45, thereby improving the tightness of the oil transfer stage.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wellhead sealing device for an oil well, comprising a support mechanism (1), characterized in that, The support mechanism (1) includes a sealing sleeve (11), the top surface of the sealing sleeve (11) is sequentially provided with a plurality of scheduling holes (12), a plurality of scheduling holes (12) are tightly connected with the pipe orifice through a fastening screw (14), the top end of the sealing sleeve (11) is sleeved with a guide pipe (13), the top surface of the guide pipe (13) is sequentially provided with a plurality of triangular flaps (15), the top end of the triangular flap (15) is sleeved with a tapered pipe head (16). The side wall of the sealing sleeve (11) is provided with an adjusting motor (17), and the output end of the adjusting motor (17) is drivingly connected with a cover (18) embedded in the sealing sleeve (11).

2. A wellhead seal apparatus for an oil well as defined in claim 1, wherein: The top end of the tapered pipe head (16) is provided with an adjusting mechanism (2), the adjusting mechanism (2) includes an adjusting screw (21), the tapered pipe head (16) is connected with a transfer oil pipe (22), the top end of the transfer oil pipe (22) is provided with a pipe joint disc (23), the top end of the pipe joint disc (23) is provided with a connecting pipe sleeve (25), and the end of the connecting pipe sleeve (25) is provided with a pipe joint sleeve (26).

3. A wellhead seal apparatus for an oil well as defined in claim 2, wherein: The end of the connecting pipe sleeve (25) is provided with an access sleeve (27), and the top end of the access sleeve (27) is provided with an oil discharge mechanism (3). The oil discharge mechanism (3) includes a cross sealing pipe (31) arranged at the top end of the access sleeve (27), a gas valve seat (32) is arranged on the front surface of the cross sealing pipe (31), a pipe sleeve (33) is communicated with the end of the gas valve seat (32), and a gas joint valve (34) is arranged at the top end of the pipe sleeve (33).

4. A wellhead seal apparatus for an oil well as defined in claim 3, wherein: The top end of the gas joint valve (34) is provided with an access pipe sleeve (35), the end of the access pipe sleeve (35) is provided with a valve rod (36), the top end of the valve rod (36) is provided with a cross connecting rod (37), and the top end of the cross connecting rod (37) is provided with a connecting sleeve (38).

5. A wellhead seal apparatus for an oil well as defined in claim 4, wherein: The top end of the connecting sleeve (38) is provided with a square box (39), the end of the square box (39) is provided with an adjusting valve rod (391), the end of the adjusting valve rod (391) is provided with a sleeve rod (392), and the end of the sleeve rod (392) is provided with a fastening valve (393).

6. A wellhead seal apparatus for an oil well as defined in claim 5, wherein: The end of the square box (39) is provided with an access sleeve (394).

7. A wellhead seal apparatus for an oil well as defined in claim 6, wherein: The top end of the square box (39) is provided with a connecting mechanism (4): The connecting mechanism (4) includes an access base (41) arranged at the top end of the square box (39), the top end of the access base (41) is provided with a pressure regulating valve (42), the valve head of the pressure regulating valve (42) is provided with a detector (43), the end of the access base (41) is provided with a liquid discharge valve (44), the top end of the liquid discharge valve (44) is provided with an adjusting base (45), and the top end of the adjusting base (45) is provided with a pipe joint valve (46).

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