Small hydraulic pressure drilling device

Abstract

The application relates to the technical field of pressure operation equipment, and discloses a small liquid-driven pressure drilling equipment, which comprises a drill rod, a main shaft, a first connecting part, a second connecting part and a feeding driving mechanism, the drill rod is installed at the front end of the main shaft, the first connecting part comprises left upper connecting plates, left lower connecting plates, left three-way pipes and clamps which are sequentially arranged and internally communicated, the clamps are provided with communication openings which are communicated with the left three-way pipes, the second connecting part comprises right upper connecting plates, right lower connecting plates, right three-way pipes and high-pressure protection pipes which are sequentially arranged and internally communicated; the small liquid-driven pressure drilling equipment provided by the application solves the problems that the existing design structure is complex and high in cost, and if the parts are damaged in the later period, the maintenance and replacement are extremely inconvenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure operation equipment, in particular to a small liquid pressure drilling equipment. BACKGROUND

[0002] After years of exploitation, a large number of wellhead gate valves of production wells appear corrosion leakage, tightness, etc., which exist huge well control and environmental protection risks; some old wells without production capacity are in the state of shut-in for a long time, the gate valves are severely corroded, cannot be opened and closed, the well pressure is unknown, and the personal and property safety of the surrounding people is greatly threatened.

[0003] In view of the above problems, the traditional treatment method is to first pressure the well, but the pressure operation cycle is long, the construction cost is high, the environmental protection problem of pressure fluid recovery process is prominent, and the reservoir damage is large. For the case of severe corrosion of the wellhead, the general method cannot be used to open or replace the gate valve, which is easy to produce external leakage, leading to the loss of control of the wellhead, therefore, the pressure drilling technology is needed.

[0004] The pressure drilling technology is a technology for drilling the gate valve or pipe string of the wellhead device of the oil and gas well under pressure to establish a pressure relief or circulation channel. The existing pressure drilling equipment, such as the practical new type patent application No. CN200520092064.5, patent name pressure drilling machine, adopts multi-gear transmission to realize the rotation and movement of the driving spindle, which has complex structure design, high cost, and inconvenient maintenance and replacement of damaged parts in the later period. SUMMARY

[0005] The purpose of the present application is to provide a small liquid pressure drilling equipment to solve at least one of the above problems in the prior art.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A small liquid pressure drilling equipment, comprising a drill pipe, a main shaft, a first connecting part, a second connecting part and a feeding driving mechanism, the drill pipe is installed at the front end of the main shaft, the first connecting part comprises left upper connecting plate, left lower connecting plate, left tee pipe and clamp which are sequentially arranged and internally communicated, the clamp is provided with a communication port communicated with the left tee pipe, the second connecting part comprises right upper connecting plate, right lower connecting plate, right tee pipe and high pressure protection pipe which are sequentially arranged and internally communicated;

[0008] The feeding driving mechanism comprises a motor, a transmission mechanism, a screw rod, a connecting rod, a nut seat and an intermediate connecting plate, the connecting rod is fixedly arranged between the left upper connecting plate and the right upper connecting plate, the two ends of the screw rod are rotationally connected with the left lower connecting plate and the right lower connecting plate respectively, one end of the screw rod extending out of the right lower connecting plate is a rotary driving end, the nut seat is threadedly matched with the screw rod, the motor is fixedly arranged on the nut seat, the motor drives the main shaft to rotate through the transmission mechanism, the transmission mechanism comprises a first chain wheel, a second chain wheel and a chain, the first chain wheel is fixedly installed on the driving end of the motor, the second chain wheel is fixedly installed on the main shaft, the chain is connected with the first chain wheel and the second chain wheel respectively, the first end of the intermediate connecting plate is fixedly connected with the nut seat, the second end of the intermediate connecting plate is rotationally matched with the main shaft, and the second end of the intermediate connecting plate is rotationally connected with the second chain wheel.

[0009] The main shaft sequentially passes through the left three-way pipe, the left lower connecting plate, the left upper connecting plate, the right upper connecting plate, the right lower connecting plate, the right three-way pipe and the high-pressure protection pipe, the end of the high-pressure protection pipe is a closed end, the left three-way pipe and the right three-way pipe are communicated through an external balance pipe line, high-pressure sealing members are arranged between the left lower connecting plate and the main shaft and between the right lower connecting plate and the main shaft, and the main shaft is slidingly matched with the left lower connecting plate and the right lower connecting plate respectively.

[0010] In the technical scheme, the motor drives the drill bit to rotate, and the driving screw rod is rotated to realize the footage. Specifically, the motor drives the first chain wheel to rotate, the first chain wheel drives the second chain wheel to rotate through the chain, since the second chain wheel is fixedly installed on the main shaft, the second chain wheel drives the main shaft to rotate, at the same time, since one end of the screw rod extending out of the right lower connecting plate is a rotary driving end, the screw rod is driven through the rotary driving end, since the nut seat is threadedly matched with the screw rod, and the first end of the intermediate connecting plate is fixedly connected with the nut seat, and the second end of the intermediate connecting plate is rotationally matched with the main shaft, the screw rod is rotated, and the nut seat drives the intermediate connecting plate to move at the same time, since the second end of the intermediate connecting plate is rotationally connected with the second chain wheel, the second chain wheel is linearly driven in the movement process of the intermediate connecting plate, the main shaft is linearly driven at the same time, and finally the main shaft can feed in and back while rotating, so that the effect of pressure drilling is realized. Compared with the prior art, the design has the advantages of simple structure, low cost, convenient use and easy maintenance, the screw rod driving is adopted for the footage, the screw rod feeding is stable, the speed is fast, and the drilling efficiency is high.

[0011] Further, the communication port is provided with an arc surface sealing block, the sealing structure solves the pipe string curved surface high-pressure sealing problem, and realizes the need of pipe string pressure drilling under pressure of 70MPa, and the high-pressure sealing member is a V-shaped cloth clamping sealing ring, and the multiple V-shaped cloth clamping sealing rings solve the main shaft high-pressure dynamic sealing problem, and the working pressure can reach 105MPa.

[0012] Further, in order to facilitate the installation between the left lower connecting plate and the left tee pipe, and the installation between the right lower connecting plate and the right tee pipe, the left lower connecting plate is threadedly connected with the left tee pipe, and the right lower connecting plate is threadedly connected with the right tee pipe.

[0013] Further, in order to facilitate the rotational cooperation between the intermediate connecting plate and the main shaft, the second end of the intermediate connecting plate is provided with a connecting sleeve, the connecting sleeve is rotationally cooperated with the main shaft, and the connecting sleeve is rotationally connected with the second sprocket.

[0014] Further, in order to facilitate the coaxial rotational cooperation between the connecting sleeve and the main shaft, the connecting sleeve is provided with an annular groove, the central shaft of the second sprocket is located in the annular groove and rotationally connected with the annular groove.

[0015] Further, in order to ensure the smoothness of the rotation between the connecting sleeve and the main shaft, and to improve the axial support effect, a rotating bearing is arranged between the connecting sleeve and the main shaft, and a pressure bearing is arranged between the central shaft and the annular groove.

[0016] Further, in order to reduce the volume of the device as much as possible, the connecting rod is located directly above the screw rod.

[0017] Further, in order to facilitate the manual operation of the screw rod rotation, the rotating driving end is provided with a footage rod for driving the screw rod to rotate.

[0018] Further, in order to realize the fixed installation of the motor, the nut seat is provided with a fixing seat, and the motor is fixedly installed on the fixing seat.

[0019] Further, in order to realize the pressure relief of the left tee pipe and / or the right tee pipe, the left tee pipe and / or the right tee pipe is connected with a plug valve.

[0020] The beneficial effects of the present application are: in the technical scheme, the drill bit is rotated by the motor, and the footage is realized by rotating the screw rod. Specifically, the motor drives the first sprocket to rotate, the first sprocket drives the second sprocket to rotate through the chain, and since the second sprocket is fixedly installed on the main shaft, the second sprocket drives the main shaft to rotate. At the same time, since one end of the screw rod extending from the right lower connecting plate is a rotary driving end, the screw rod is driven through the rotary driving end. Since the nut seat is threadedly connected with the screw rod, and the first end of the intermediate connecting plate is fixedly connected with the nut seat, and the second end of the intermediate connecting plate is in rotary connection with the main shaft, the nut seat drives the intermediate connecting plate to move while the screw rod rotates. Since the second end of the intermediate connecting plate is in rotary connection with the second sprocket, the second sprocket is linearly driven in the movement of the intermediate connecting plate, and the main shaft is linearly driven at the same time. Finally, the main shaft can advance and retreat while rotating, thereby realizing the effect of pressure drilling. Compared with the prior art, the present application has the advantages of simple structure, low cost, convenient use and easy maintenance. The footage is realized by the screw rod transmission, the screw rod feeding is stable, the speed is fast, and the drilling efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the present application;

[0022] Figure 2 It is Figure 1 It is a sectional view structural schematic diagram of A-A in the present application;

[0023] Figure 3 It is Figure 2 It is a local enlarged structural schematic diagram of A in the present application;

[0024] Figure 4 It is Figure 2 It is a local enlarged structural schematic diagram of B in the present application.

[0025] In the figure: drill rod 1; main shaft 2; left upper connecting plate 3; left lower connecting plate 4; clamp 5; communication port 6; right upper connecting plate 7; right lower connecting plate 8; right tee pipe 9; high-pressure protection pipe 10; motor 11; screw rod 12; connecting rod 13; nut seat 14; intermediate connecting plate 15; first sprocket 16; second sprocket 17; chain 18; external balance pipe line 19; arc surface sealing block 20; V-shaped cloth clamping sealing ring 21; connecting sleeve 22; annular groove 23; center shaft 24; rotary bearing 25; pressure bearing 26; footage rod 27; fixed seat 28; plug valve 29; left tee pipe 30. DETAILED DESCRIPTION

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0027] Example 1:

[0028] like Figures 1-4 As shown, this embodiment provides a small hydraulic live drilling device, including a drill rod 1, a spindle 2, a first connecting part, a second connecting part, and a feed drive mechanism. The drill rod 1 is installed at the front end of the spindle 2. The first connecting part includes a left upper connecting plate 3, a left lower connecting plate 4, a left tee pipe 30, and a clamp 5 arranged sequentially and internally connected. The clamp 5 is provided with a connecting port 6 that communicates with the left tee pipe 30. The drill rod 1 extends into the clamp 5 from the connecting port 6. The second connecting part includes a right upper connecting plate 7, a right lower connecting plate 8, a right tee pipe 9, and a high-pressure protective pipe 10 arranged sequentially and internally connected.

[0029] The feed drive mechanism includes a motor 11, a transmission mechanism, a screw 12, a connecting rod 13, a nut seat 14, and an intermediate connecting plate 15. The connecting rod 13 is fixedly disposed between the upper left connecting plate 3 and the upper right connecting plate 7. The two ends of the screw 12 are rotatably connected to the lower left connecting plate 4 and the lower right connecting plate 8, respectively. The end of the screw 12 extending out of the lower right connecting plate 8 is the rotary drive end. The nut seat 14 is threadedly engaged with the screw 12. The motor 11 is fixedly disposed on the nut seat 14. The motor 11 drives the main shaft 2 to rotate through the transmission mechanism. The transmission mechanism includes a... The system includes a sprocket 16, a second sprocket 17, and a chain 18. The first sprocket 16 is fixedly mounted on the drive end of the motor 11, the second sprocket 17 is fixedly mounted on the main shaft 2, and the chain 18 is connected to the first sprocket 16 and the second sprocket 17 respectively. The first end of the intermediate connecting plate 15 is fixedly connected to the nut seat 14, and the second end of the intermediate connecting plate 15 is rotatably engaged with the main shaft 2. In order to facilitate the layout design of the transmission mechanism, the intermediate connecting plate 15 is located near the second connecting part, and the second end of the intermediate connecting plate 15 is rotatably connected to the second sprocket 17.

[0030] The main shaft 2 passes through the left tee pipe 30, the lower left connecting plate 4, the upper left connecting plate 3, the upper right connecting plate 7, the lower right connecting plate 8, the right tee pipe 9, and the high-pressure protective pipe 10 in sequence. The end of the high-pressure protective pipe 10 is a closed end. The left tee pipe 30 and the right tee pipe 9 are connected by an external balance line 19. High-pressure seals are provided between the lower left connecting plate 4 and the main shaft 2, and between the lower right connecting plate 8 and the main shaft 2. The main shaft 2 slides in cooperation with the lower left connecting plate 4 and the lower right connecting plate 8, respectively.

[0031] In the technical solution, the drill bit is driven to rotate by the motor 11, and the footage is realized by rotating the driving screw 12. Specifically, the motor 11 drives the first sprocket 16 to rotate, the first sprocket 16 drives the second sprocket 17 to rotate through the chain 18, and since the second sprocket 17 is fixedly installed on the main shaft 2, the second sprocket 17 drives the main shaft 2 to rotate. At the same time, since one end of the screw rod 12 extending from the right lower connecting plate 8 is a rotary driving end, the screw rod 12 is driven through the rotary driving end. Since the nut seat 14 is threadedly connected with the screw rod 12, the first end of the intermediate connecting plate 15 is fixedly connected with the nut seat 14, and the second end of the intermediate connecting plate 15 is rotationally connected with the main shaft 2, the screw rod 12 rotates at the same time, the nut seat 14 drives the intermediate connecting plate 15 to move, and since the second end of the intermediate connecting plate 15 is rotationally connected with the second sprocket 17, the second sprocket 17 is linearly driven in the movement of the intermediate connecting plate 15, and the main shaft 2 is linearly driven at the same time. Finally, the main shaft 2 can advance and retreat while rotating, thereby realizing the effect of drilling under pressure. Compared with the prior art, the design has the advantages of simple structure, low cost, convenient use and easy maintenance. The footage is realized by the screw rod 12 transmission, the screw rod 12 feeding is stable, the speed is fast, and the drilling efficiency is high.

[0032] Embodiment 2:

[0033] This embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0034] An arc sealing block 20 is arranged at the communication port 6, and the arc sealing block 20 has an arc sealing surface which is adapted to the curved surface of the pipe string. The design of the sealing structure solves the problem of high-pressure sealing of the curved surface of the pipe string, and realizes the need of the pipe string drilling under pressure of 70 MPa. The high-pressure sealing element is a V-shaped cloth clamping sealing ring 21, which solves the problem of high-pressure dynamic sealing of the main shaft 2. The working pressure can reach 105 MPa. The size of the drill pipe 1 can be set according to the needs, and preferably, the drilling diameter can be φ12mm-φ36mm.

[0035] Embodiment 3:

[0036] This embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0037] In order to facilitate the installation between the left lower connecting plate 4 and the left tee pipe 30, and the installation between the right lower connecting plate 8 and the right tee pipe 9, the left lower connecting plate 4 and the left tee pipe 30 are threadedly connected, and the right lower connecting plate 8 and the right tee pipe 9 are threadedly connected.

[0038] Embodiment 4:

[0039] This embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0040] In order to conveniently realize the rotation cooperation between the intermediate connecting plate 15 and the main shaft 2, the second end of the intermediate connecting plate 15 is provided with a connecting sleeve 22, the connecting sleeve 22 is in rotation cooperation with the main shaft 2, and the connecting sleeve 22 is in rotation connection with the second sprocket 17.

[0041] Embodiment 5:

[0042] The embodiment is optimized on the basis of the above-mentioned embodiment 4.

[0043] In order to conveniently realize the coaxial rotation cooperation between the connecting sleeve 22 and the main shaft 2, the connecting sleeve 22 is provided with an annular groove 23, and the central shaft 24 of the second sprocket 17 is located in the annular groove 23 and in rotation connection therebetween.

[0044] Embodiment 6:

[0045] The embodiment is optimized on the basis of the above-mentioned embodiment 5.

[0046] In order to ensure the smoothness of the rotation between the connecting sleeve 22 and the main shaft 2, and to improve the axial support effect, a rotation bearing 25 is arranged between the connecting sleeve 22 and the main shaft 2, and a pressure bearing 26 is arranged between the central shaft 24 and the annular groove 23.

[0047] Embodiment 7:

[0048] The embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0049] In order to reduce the volume of the equipment as much as possible, the connecting rod 13 is located directly above the screw rod 12.

[0050] Embodiment 8:

[0051] The embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0052] In order to facilitate manual operation of the rotation of the screw rod 12, the rotation driving end is provided with a footage rod 27 for driving the rotation of the screw rod 12.

[0053] Embodiment 9:

[0054] The embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0055] In order to realize the fixed installation of the motor 11, the nut seat 14 is provided with a fixing seat 28, and the motor 11 is fixedly installed on the fixing seat 28. In order to improve the safety of use, the motor 11 is a hydraulic motor, and the hydraulic motor is connected with a small hydraulic station.

[0056] Embodiment 10:

[0057] The embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0058] In order to realize pressure relief of the left three-way pipe 30 and / or the right three-way pipe 9, the left three-way pipe 30 and / or the right three-way pipe 9 is connected with a plug valve 29.

[0059] In conclusion, the design can work while producing, and the drilling and pressure relief can be carried out synchronously, so that the safety is high.

[0060] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A small hydraulic pressure drilling device, characterized in that: The device includes a drill rod, a spindle, a first connecting part, a second connecting part, and a feed drive mechanism. The drill rod is installed at the front end of the spindle. The first connecting part includes a left upper connecting plate, a left lower connecting plate, a left tee pipe, and a clamp that are arranged sequentially and internally connected. The clamp has a communication port that communicates with the left tee pipe. The second connecting part includes a right upper connecting plate, a right lower connecting plate, a right tee pipe, and a high-pressure protective pipe that are arranged sequentially and internally connected. The feed drive mechanism includes a motor, a transmission mechanism, a screw, a connecting rod, a nut seat, and an intermediate connecting plate. The connecting rod is fixedly disposed between the upper left connecting plate and the upper right connecting plate. The two ends of the screw are rotatably connected to the lower left connecting plate and the lower right connecting plate, respectively. The end of the screw extending out of the lower right connecting plate is the rotary drive end. The nut seat is threadedly engaged with the screw. The motor is fixedly disposed on the nut seat. The motor drives the main shaft to rotate through the transmission mechanism. The transmission mechanism includes a first sprocket, a second sprocket, and a chain. The first sprocket is fixedly mounted on the drive end of the motor. The second sprocket is fixedly mounted on the main shaft. The chain is connected to the first sprocket and the second sprocket, respectively. The first end of the intermediate connecting plate is fixedly connected to the nut seat. The second end of the intermediate connecting plate is rotatably engaged with the main shaft. The second end of the intermediate connecting plate is rotatably connected to the second sprocket. The main shaft passes sequentially through the left tee pipe, the lower left connecting plate, the upper left connecting plate, the upper right connecting plate, the lower right connecting plate, the right tee pipe, and the high-pressure protective pipe. The end of the high-pressure protective pipe is a closed end. The left tee pipe and the right tee pipe are connected by an external balance pipeline. High-pressure seals are provided between the lower left connecting plate and the main shaft, and between the lower right connecting plate and the main shaft. The main shaft slides in cooperation with the lower left connecting plate and the lower right connecting plate, respectively. The second end of the intermediate connecting plate is provided with a connecting sleeve, which is rotatably engaged with the main shaft and rotatably connected to the second sprocket; The connecting sleeve is provided with an annular groove, and the central shaft of the second sprocket is located in the annular groove and the two are rotatably connected. A rotary bearing is provided between the connecting sleeve and the main shaft, and a pressure bearing is provided between the central shaft and the annular groove; The rotary drive end is equipped with a feed rod for driving the screw to rotate.

2. The small hydraulic pressure drilling device according to claim 1, characterized in that: An arc-shaped sealing block is provided at the connection port, and the high-pressure sealing element is a V-shaped fabric-reinforced sealing ring.

3. The small hydraulic pressure drilling device according to claim 1, characterized in that: The lower left connecting plate is threaded to the left tee pipe, and the lower right connecting plate is threaded to the right tee pipe.

4. The small hydraulic pressure drilling device according to claim 1, characterized in that: The connecting rod is located directly above the screw.

5. A small hydraulic pressure drilling device according to claim 1, characterized in that: The nut seat is provided with a fixing seat, and the motor is fixedly mounted on the fixing seat.

6. A small hydraulic pressure drilling device according to claim 1, characterized in that: The left tee and / or right tee are connected to a stopcock valve.

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