Balanced high-pressure oil-gas-water well drilling device

Abstract

The utility model relates to the field of pressure drilling device, concretely relates to a balanced high pressure oil gas well pressure drilling device, including hydraulic balance mechanism, drilling mechanism and drill feed mechanism, the drilling mechanism includes hydraulic motor, and the output shaft coaxially fixed connection has the central rod at the bottom of hydraulic motor, and the bottom end of central rod is connected with the drill bit for drilling to the flow process pipeline, the hydraulic balance mechanism includes sending in liquid cylinder, balance liquid cylinder and four -way connecting plate, the piston rod of sending in liquid cylinder bottom is connected with hydraulic motor, the top end of balance liquid cylinder is connected with sending in liquid cylinder, and the bottom is connected with four -way connecting plate, four -way connecting plate is set up in the outside of central rod, is used for realizing the intercommunication of balance liquid cylinder and drilling, and the piston is slidably connected in balance liquid cylinder, and the dynamic balance of the hydraulic pressure in sending in liquid cylinder and drilling place well pressure is realized through the piston, the drill feed mechanism is used for controlling the downward movement of drill bit.

Description

Technical Field

[0001] This utility model relates to the field of pressurized drilling devices, specifically to a balanced high-pressure oil, gas and water well pressurized drilling device. Background Technology

[0002] In oil, gas, and water well production, damage to wellhead valves often prevents the establishment of an effective pressure communication channel between the wellbore or the inside of the wellhead and the outside. Currently, the industry commonly uses live drilling technology as a solution to establish new fluid channels without depressurization.

[0003] In engineering practice, the selection of pressurized drilling equipment needs to take into account the well pressure parameters: low-pressure wells have low well pressure and have little impact on drilling, so simple manual devices can be used for drilling; high-pressure wells have high well pressure and high well pressure during drilling, making it difficult to manually adjust the drill bit position using manual devices, so hydraulic cylinders can be used to pressurize and feed the drill bit to ensure construction safety and work efficiency.

[0004] Currently, the design of high-pressure well drilling equipment both domestically and internationally generally adopts a technical approach that enhances the overall structural strength. While this design concept can ensure pressure resistance, it inevitably leads to a large equipment size and increased weight, causing many inconveniences for on-site construction operations. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a balanced high-pressure oil, gas and water well pressurized drilling device, which solves the problem that in the prior art, the well pressure of high-pressure wells is high, the pressure inside the well is large during drilling, and it is difficult to manually adjust the position of the drill bit through manual devices. The only way is to use a hydraulic cylinder to pressurize and feed the drill bit, so as to ensure construction safety and operation efficiency.

[0006] A balanced high-pressure oil, gas and water well drilling device includes a hydraulic balancing mechanism, a drilling mechanism and a drill bit feeding mechanism;

[0007] The drilling mechanism includes a hydraulic motor, and a central rod is coaxially fixedly connected to the output shaft at the bottom of the hydraulic motor. A drill bit for drilling the process pipeline is connected to the bottom end of the central rod.

[0008] The hydraulic balancing mechanism includes a feed cylinder, a balancing cylinder, and a four-way connecting plate; the piston rod at the bottom of the feed cylinder is connected to a hydraulic motor; the top of the balancing cylinder is connected to the feed cylinder, and the bottom is connected to the four-way connecting plate; the four-way connecting plate is sleeved on the outside of the central rod to achieve communication between the balancing cylinder and the borehole; a piston is slidably connected inside the balancing cylinder to achieve dynamic balance between the hydraulic pressure in the feed cylinder and the well pressure at the borehole.

[0009] The drill bit feed mechanism is used to control the downward movement of the drill bit.

[0010] Furthermore, the hydraulic balancing mechanism includes a hydraulic pump, with the outlet end of the hydraulic pump connected to the inlet end of the feed cylinder, and the inlet end of the hydraulic pump connected to the outlet end of the feed cylinder.

[0011] Furthermore, valves are respectively provided at the inlet and outlet ends of the hydraulic pump and the inlet and outlet ends of the balance cylinder.

[0012] Furthermore, the drilling device includes a mounting frame; the mounting frame includes a horizontally arranged first plate, which is fixedly connected to the feed cylinder, and both ends of the first plate are respectively connected to the top end of a vertically arranged pull rod; a four-way connecting plate is provided below the first plate, with both ends fixedly connected to the bottom end of the pull rod.

[0013] Furthermore, a third plate is provided below the first plate, with both ends of the third plate slidably connected to the pull rod, and the third plate is fixedly connected to the hydraulic motor.

[0014] Furthermore, the drill bit feeding mechanism includes a threaded rod, a second plate, and a feed nut; the bottom end of the piston rod is provided with a threaded rod, the bottom end of which is fixedly connected to a hydraulic motor, and a second plate is sleeved on the outside of the threaded rod, with both ends fixedly connected to a pull rod respectively. A feed nut is threadedly connected to the threaded rod, and the feed nut is used to cooperate with the second plate to move the drill bit downward.

[0015] Furthermore, the top of the four-way connecting plate is equipped with multiple rotating sealing rings that are fitted onto the central rod.

[0016] Furthermore, one end of the four-way connecting plate is connected to the bottom of the balance liquid cylinder, and the other end of the four-way connecting plate is connected to a pressure gauge.

[0017] Furthermore, a control gate valve is provided at the bottom end of the four-way connecting plate. The control gate valve is used to control whether the balance liquid cylinder is connected to the borehole.

[0018] Furthermore, the drilling device includes a sealing clamp, which is connected to the bottom end of the control gate valve and is used to clamp the process pipeline.

[0019] Beneficial effects: The hydraulic balancing mechanism keeps the pressure on both sides of the center rod dynamically balanced, avoiding the influence of well pressure on drill bit position adjustment. This eliminates the need to force the drill bit in through hydraulic or gear-driven mechanisms. The drill bit position can be finely adjusted by using the feed nut, simplifying the device structure, reducing the weight of the equipment, and facilitating safe and efficient use. It also avoids the problem of excessive drill bit feed pressure causing damage to the drill bit due to hydraulic or gear-driven mechanisms. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0022] In the diagram: 1. Hydraulic pump; 2. Feed cylinder; 3. Balance cylinder; 4. Piston; 5. Tie rod; 6. First plate; 7. Second plate; 8. Third plate; 9. Four-way connecting plate; 10. Feed nut; 11. Hydraulic motor; 12. Center rod; 13. Rotary sealing ring; 14. Control gate valve; 15. Drill bit; 16. Sealing clamp; 17. Process pipeline. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] It should be noted that the embodiments and features involved in the embodiments of this utility model can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] like Figure 1 The apparatus shown is a balanced high-pressure oil, gas and water well drilling device, which includes a hydraulic balancing mechanism, a drilling mechanism and a drill bit feeding mechanism.

[0026] The drilling mechanism includes a hydraulic motor 11, and a central rod 12 is coaxially fixedly connected to the output shaft at the bottom of the hydraulic motor 11. A drill bit 15 for drilling the process pipeline 17 is connected to the bottom end of the central rod 12.

[0027] The hydraulic balancing mechanism includes a feed cylinder 2, a balancing cylinder 3, and a four-way connecting plate 9; the piston rod at the bottom of the feed cylinder 2 is connected to the hydraulic motor 11; the top of the balancing cylinder 3 is connected to the feed cylinder 2, and the bottom is connected to the four-way connecting plate 9; the four-way connecting plate 9 is sleeved on the outside of the central rod 12 to realize the communication between the balancing cylinder 3 and the borehole; a piston 4 is slidably connected inside the balancing cylinder 3, and the piston 4 realizes the dynamic balance between the hydraulic pressure in the feed cylinder 2 and the well pressure at the borehole.

[0028] The feed mechanism of drill bit 15 is used to control the downward movement of drill bit 15.

[0029] In this embodiment, the hydraulic balancing mechanism ensures that the pressure on the upper and lower sides of the center rod 12 remains dynamically balanced, avoiding the influence of the well pressure on the position adjustment of the drill bit 15. This eliminates the need to forcibly feed the drill bit 15 through hydraulic or gear-driven mechanisms. The position of the drill bit 15 can be finely adjusted by using the feed nut 10, simplifying the structure of the device, reducing the weight of the equipment, and facilitating safe and efficient use of the device. At the same time, it avoids the problem of excessive feed pressure on the drill bit 15 causing damage to the drill bit 15 due to hydraulic or gear-driven mechanisms.

[0030] The hydraulic balancing mechanism includes a hydraulic pump 1, the outlet of which is connected to the inlet of the feed cylinder 2, and the inlet of the hydraulic pump 1 is connected to the outlet of the feed cylinder 2. Valves are respectively provided at the inlet and outlet of the hydraulic pump 1 and at the inlet and outlet of the balancing cylinder 3.

[0031] In this embodiment, the hydraulic pump 1 is used to adjust the hydraulic pressure in the feed cylinder 2, thereby adjusting the position of the piston rod at the bottom of the feed cylinder 2.

[0032] The drilling device includes a mounting frame; the mounting frame includes a horizontally arranged first plate 6, which is fixedly connected to the feed cylinder 2, and the two ends of the first plate 6 are respectively connected to the top of the vertically arranged pull rod 5; a four-way connecting plate 9 is provided below the first plate 6, with both ends fixedly connected to the bottom of the pull rod 5.

[0033] A third plate 8 is provided below the first plate 6. The two ends of the third plate 8 are slidably connected to the pull rod 5, and the third plate 8 is fixedly connected to the hydraulic motor 11.

[0034] In this embodiment, the mounting bracket has a simple structure, making it easy to install and use. At the same time, its high structural strength ensures the stability of the device's normal operation. The third plate 8 is designed to prevent the central rod 12 from tilting.

[0035] The four-way connecting plate 9 has a channel for the center rod 12 to move up or down. The top of the four-way connecting plate 9 is provided with multiple rotating sealing rings 13 that are sleeved on the center rod 12. One end of the four-way connecting plate 9 is connected to the bottom end of the balance liquid cylinder 3, and the other end of the four-way connecting plate 9 is connected to a pressure gauge. The bottom end of the four-way connecting plate 9 is provided with a control gate valve 14, which is used to control whether the balance liquid cylinder 3 is connected to the borehole.

[0036] In this embodiment, the opening and closing of the control valve can determine whether the balance cylinder 3 is connected to the borehole, thereby adjusting the pressure difference between the upper and lower parts of the center rod 12.

[0037] The drill bit 15 feed mechanism includes a threaded rod, a second plate 7, and a feed nut 10. A threaded rod is provided at the bottom end of the piston rod, and the bottom end of the threaded rod is fixedly connected to the hydraulic motor 11. A second plate 7, with both ends fixedly connected to the pull rod 5, is sleeved on the outside of the threaded rod. A feed nut 10 is threadedly connected to the threaded rod, and the feed nut 10 is used to cooperate with the second plate 7 to move the drill bit 15 downwards. Preferably, the threaded rod and the piston rod are integrally formed.

[0038] In this embodiment, the feed nut 10 can cooperate with the second plate 7 to finely adjust the downward position of the drill bit 15. The fine adjustment can reduce the possibility of damaging the drill bit 15 due to excessive pressure.

[0039] The drilling device includes a sealing clamp 16, which is connected to the bottom end of the control gate valve 14. The sealing clamp 16 is used to clamp the process pipeline 17.

[0040] In this embodiment, the sealing clamp 16 fixes the process pipeline 17, which can reduce the possibility of the drill bit 15 shifting position during drilling and facilitate the drill bit 15 drilling holes in the process pipeline 17.

[0041] Working principle: The process pipeline 17 is fixed by the sealing clamp 16, and then the hydraulic pump 1 injects liquid into the feed cylinder 2. The piston rod of the feed cylinder 2 moves downward, and the drill bit 15 moves downward. Then the drill bit 15 comes into contact with the process pipeline 17. The hydraulic motor 11 starts, and the drill bit 15 moves downward through the feed nut 10 to drill a hole in the process pipeline 17. After the outlet is drilled on the process pipeline 17, the channel in the process pipeline 17 is connected to the balance cylinder 3 by the control gate valve 14. Under the action of well pressure, the piston 4 moves to maintain the dynamic balance of pressure on the upper and lower sides of the piston 4. Then the feed nut 10 controls the drill bit 15 to continue drilling downward until the drilling is completed.

[0042] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A balanced high-pressure oil, gas and water well drilling device, characterized in that, Includes a hydraulic balancing mechanism, a drilling mechanism, and a drill bit feed mechanism; The drilling mechanism includes a hydraulic motor, and a central rod is coaxially fixedly connected to the output shaft at the bottom of the hydraulic motor. A drill bit for drilling the process pipeline is connected to the bottom end of the central rod. The hydraulic balancing mechanism includes a feed cylinder, a balancing cylinder, and a four-way connecting plate; the piston rod at the bottom of the feed cylinder is connected to a hydraulic motor; the top of the balancing cylinder is connected to the feed cylinder, and the bottom is connected to the four-way connecting plate; the four-way connecting plate is sleeved on the outside of the central rod to achieve communication between the balancing cylinder and the borehole; a piston is slidably connected inside the balancing cylinder to achieve dynamic balance between the hydraulic pressure in the feed cylinder and the well pressure at the borehole. The drill bit feed mechanism is used to control the downward movement of the drill bit.

2. The balanced high-pressure oil, gas and water well drilling device according to claim 1, characterized in that, The hydraulic balancing mechanism includes a hydraulic pump, with the outlet end of the hydraulic pump connected to the inlet end of the feed cylinder, and the inlet end of the hydraulic pump connected to the outlet end of the feed cylinder.

3. A balanced high-pressure oil, gas and water well drilling device according to claim 2, characterized in that, The hydraulic pump is equipped with valves at its inlet and outlet ends, and the balance cylinder is equipped with valves at its inlet and outlet ends.

4. A balanced high-pressure oil, gas and water well drilling device according to claim 1, characterized in that, The drilling device includes a mounting frame; the mounting frame includes a horizontally arranged first plate, which is fixedly connected to the feed cylinder, and both ends of the first plate are respectively connected to the top of a vertically arranged pull rod; a four-way connecting plate is provided below the first plate, with both ends fixedly connected to the bottom of the pull rod.

5. A balanced high-pressure oil, gas and water well drilling device according to claim 4, characterized in that, A third plate is provided below the first plate. The two ends of the third plate are slidably connected to the pull rod, and the third plate is fixedly connected to the hydraulic motor.

6. A balanced high-pressure oil, gas and water well drilling device according to claim 4 or 5, characterized in that, The drill bit feeding mechanism includes a threaded rod, a second plate, and a feed nut; the bottom end of the piston rod is provided with a threaded rod, the bottom end of which is fixedly connected to a hydraulic motor, and a second plate is sleeved on the outside of the threaded rod, with both ends fixedly connected to a pull rod respectively. A feed nut is threadedly connected to the threaded rod, and the feed nut is used to cooperate with the second plate to move the drill bit downward.

7. A balanced high-pressure oil, gas and water well drilling device according to claim 1, characterized in that, The top of the four-way connecting plate is equipped with multiple rotating sealing rings that are fitted onto the central rod.

8. A balanced high-pressure oil, gas and water well drilling device according to claim 7, characterized in that, One end of the four-way connecting plate is connected to the bottom of the balance liquid cylinder, and the other end of the four-way connecting plate is connected to a pressure gauge.

9. A balanced high-pressure oil, gas and water well drilling device according to claim 1, characterized in that, The bottom end of the four-way connecting plate is equipped with a control gate valve, which is used to control whether the balance liquid cylinder is connected to the borehole.

10. A balanced high-pressure oil, gas and water well drilling device according to claim 9, characterized in that, The drilling device includes a sealing clamp, which is connected to the bottom end of a control gate valve and is used to clamp the process pipeline.

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