A drag-reducing and friction-reducing device for compact oil shale oil exploitation drilling

Abstract

This invention provides a drag reduction and friction reduction device for drilling in tight oil shale oil extraction, comprising a leveling and friction reduction component and an oscillating and friction reduction component, wherein the leveling and friction reduction component is disposed above the oscillating and friction reduction component; the leveling and friction reduction component includes at least a leveling component capable of acting on the inner wall of the borehole for crushing and leveling the inner wall; the oscillating and friction reduction component is capable of axial oscillation. The axial movement of the leveling section itself drives the leveling roller or leveling teeth to perform leveling actions. During operation, the output end of the leveling oscillator first contacts the second phase of the leveling seat, and then contacts the first phase, thereby improving the leveling efficiency of the leveling component, reducing the impact of bends on the overall drill pipe, and improving the drag reduction and friction reduction effect.

Description

Technical Field

[0001] This invention relates to the field of drag reduction and friction reduction devices, specifically a drag reduction and friction reduction device for drilling in tight oil shale oil extraction. Background Technology

[0002] During the drilling process of tight shale oil extraction, friction is generated between the drill string and the well wall, which affects the drilling speed. This friction generates additional torque, resulting in low mechanical speed or even pressure build-up, which seriously affects the drilling speed.

[0003] Existing friction reduction devices mostly use hydraulic oscillation to achieve friction reduction. Simply put, they use hydraulic power to drive the rotary valve to rotate, realizing the periodic opening and closing of the rotary valve, thereby generating pulses. The axial pulses provided by the hydraulic power convert the static friction between the drill string and the well wall into dynamic friction. However, its force is singular and the effect is generally poor. In addition, when the drill string needs to be deflected, the bending point of the well wall will seriously affect the drilling process.

[0004] Therefore, it is necessary to provide a drag reduction and friction reduction device for drilling tight shale oil extraction to solve the problems mentioned in the background art. Summary of the Invention

[0005] To overcome the problem that existing drag-reducing and friction-reducing devices have a single force and poor effect, and that the bending of the well wall can seriously affect drilling when the drill string needs to be deflected, this invention provides a drag-reducing and friction-reducing device for tight oil shale oil drilling. This invention can achieve deflection during the drilling process. The output end of the leveling oscillator first contacts the second phase of the leveling seat, and then contacts the first phase of the leveling seat, thereby improving the leveling efficiency of the leveling component, reducing the impact of the bending point on the overall drill pipe, and improving the drag-reducing and friction-reducing effect.

[0006] The technical solution adopted in this invention is as follows:

[0007] A friction reduction device for drilling tight shale oil extraction includes a leveling friction reduction component and an oscillating friction reduction component. The leveling friction reduction component is located above the oscillating friction reduction component. The leveling friction reduction component includes at least a leveling component that can act on the inner wall of the borehole to break up and level the inner wall of the borehole. The oscillating friction reduction component can drive itself to oscillate axially.

[0008] The leveling assembly includes a leveling seat one, a leveling roller, a leveling seat two, leveling teeth and a telescopic device. The leveling seat one and the leveling seat two are located on the same side of the leveling short section body, and both the leveling seat one and the leveling seat two slide in a sealed manner along the radial direction of the leveling short section body.

[0009] The first leveling seat is equipped with a leveling roller, and the second leveling seat is fixedly equipped with leveling teeth;

[0010] Both leveling base one and leveling base two are provided with a separate control plate on the side near the center of the leveling short section body. The control plate can slide along the radial direction of the leveling short section body. Both leveling base one and leveling base two are provided with a return spring one, and the other end of each return spring one is connected to the leveling short section body.

[0011] The leveling seat one is located above the leveling seat two.

[0012] It also includes a leveling and reinforcing component, which includes a bearing housing, a limiting rod, a motor, and a leveling oscillator. There are two bearing housings, which are axially symmetrically fixed in the upper part of the leveling short section body. The bearing housings are provided with flow holes. The motor is located in the upper end of the leveling short section body. A lead screw is connected to the lower end of the motor. A lead screw nut is connected to the lower end of the lead screw. The lead screw nut is connected to a sliding sleeve through a rod body. The sliding sleeve is slidably sleeved on the limiting rod. The limiting rod is arranged parallel to the lead screw and its upper end is connected to the bearing housing.

[0013] The leveling oscillator is fixed on the nut seat, and the output end of the leveling oscillator passes through the hole on the control board and contacts leveling seat one or leveling seat two.

[0014] One end of the leveling short section body forms a hinged inner cylinder, which is hinged to a flexible connecting section, and the other end forms a hinged outer cylinder, which is used to be hinged to the vibration friction reduction component. A main valve is provided at the end of the leveling short section body that forms the hinged inner cylinder.

[0015] The oscillation friction reduction assembly includes an oscillation sub-body, a chute, a pusher plate, and a hydraulic drive assembly. The oscillation sub-body has multiple chutes extending radially along its circumference. A pusher plate is slidably disposed in the chute, and the radial sliding of the pusher plate is driven by the hydraulic drive assembly.

[0016] The hydraulic drive assembly includes a rotary valve, a transition rod, a connecting rod, a rotor, and a stator. The rotary valve is located inside the oscillating subbody and has a through-hole.

[0017] The rotary valve has a connecting rod coaxially fixed at one end away from the slide groove. The connecting rod is hinged to the connecting rod. The other end of the connecting rod is coaxially fixed to the rotor. The rotor is drivenly connected to the stator. The stator is fixed inside the connecting short section. One end of the connecting short section is hinged to the oscillating short section body, and the other end is hinged to the leveling and friction-reducing assembly. A support rod is inclined between the connecting rod and the inner wall of the oscillating short section body.

[0018] A driven bevel gear is coaxially mounted on the adapter rod. The driven bevel gear meshes with the driving bevel gear. The driving bevel gear is fixed at the output end of the second motor. The second motor is fixed inside the oscillating short section body.

[0019] The push plate is concave, and a hydraulic telescopic rod is provided in the slide groove. The hydraulic telescopic rod is in contact with the concave part of the push plate. Multiple return springs are provided between the push plate and the slide groove.

[0020] The oscillating sub body has a collecting groove in the middle of one end of the sliding groove. The collecting groove is connected to the sliding groove by a manifold, and multiple drain pipes are provided on the collecting groove.

[0021] The beneficial effects of this invention are as follows:

[0022] This device can achieve deflection during the drilling process. At this time, the main valve is kept closed, and one or two sets of hydraulic telescopic rods are extended, so that the push plate can be used to abut against the well wall to achieve quantitative deflection of the borehole.

[0023] In reducing drag and friction, this invention utilizes water flow sequentially through a flexible connecting joint and a leveling and friction-reducing assembly to drive the rotor and rotary valve to rotate. The rotation of the rotary valve sequentially provides water to each slide groove, thereby driving the push plate to slide radially and achieve its own radial oscillation, thus improving the static friction between it and the well wall.

[0024] In this invention, the axial movement of the leveling short section body itself can drive the leveling roller or leveling teeth to perform leveling action. During operation, the output end of the leveling oscillator first contacts the second phase of the leveling seat and then contacts the first phase of the leveling seat, thereby improving the leveling efficiency of the leveling assembly, reducing the impact of the bend on the overall drill rod, and improving the effect of drag reduction and friction reduction. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the leveling and friction-reducing component in this invention.

[0027] Figure 3 This is a schematic diagram of the oscillation friction reduction component in this invention.

[0028] In the figure, the attached labels are as follows: 1. Leveling and friction-reducing assembly; 2. Vibration and friction-reducing assembly; 3. Flexible connecting joint; 11. Leveling short section body; 12. Bearing seat; 13. Limiting rod; 14. Motor 1; 15. Sliding sleeve; 16. Leveling vibrator; 17. Leveling seat 1; 18. Leveling roller; 19. Leveling seat 2; 110. Leveling tooth; 111. Expansion joint; 112. Control board; 113. Main valve; 21. Vibration short section body; 22. Slide groove; 23. Push plate; 24. Rotary valve; 25. Adapter rod; 26. Connecting rod; 27. Rotor; 28. Stator; 29. ​​Connecting short section; 210. Support rod; 211. Motor 2; 212. Manifold; 213. Collection groove; 214. Drain pipe. Detailed Implementation

[0029] Example 1:

[0030] To overcome the problem that existing drag-reducing and friction-reducing devices have a single force and poor effect, and that the bending of the well wall can severely affect drilling progress when the drill string needs to be deflected, this invention provides... Figures 1-3 The invention discloses a drag reduction and friction reduction device for drilling tight oil shale oil extraction. The device enables deflection during drilling, with the output end of the leveling oscillator first contacting the second phase of the leveling seat and then the first phase of the leveling seat. This improves the leveling efficiency of the leveling assembly, reduces the impact of bends on the overall drill pipe, and enhances the drag reduction and friction reduction effect.

[0031] A friction reduction device for drilling tight shale oil extraction includes a leveling friction reduction component 1 and an oscillating friction reduction component 2. The leveling friction reduction component 1 is located above the oscillating friction reduction component 2. The leveling friction reduction component 1 includes at least a leveling component that can act on the inner wall of the borehole for breaking and leveling the inner wall of the borehole. The oscillating friction reduction component 2 can drive itself to oscillate axially.

[0032] like Figure 1 As shown, in use, the leveling and friction reducing component 1 and the oscillating friction reducing component 2 are hinged together and arranged at one end of the flexible connecting joint 3. The flexible connecting joint 3 is used to transmit drilling pressure, while the drill bit is installed at the end of the oscillating friction reducing component 2 away from the flexible connecting joint 3.

[0033] This invention provides a drag-reducing and friction-reducing device for drilling tight oil shale oil extraction, which can achieve deflection during the drilling process. The leveling and friction-reducing component 1 and the oscillation friction-reducing component 2 provided by this invention are used together to improve leveling efficiency, reduce the impact of bends on the overall drill pipe, and enhance the drag-reducing and friction-reducing effect.

[0034] Example 2:

[0035] Based on Embodiment 1, in this embodiment, preferably, the leveling assembly includes a leveling seat 17, a leveling roller 18, a leveling seat 2 19, a leveling tooth 110, and a telescoping device 111. The leveling seat 17 and the leveling seat 2 19 are located on the same side of the leveling short section body 11, and both the leveling seat 17 and the leveling seat 2 19 slide radially and in a sealed manner along the leveling short section body 11.

[0036] The leveling seat 17 is provided with a leveling roller 18, and the leveling seat 2 19 is fixedly provided with a leveling tooth 110;

[0037] Both the leveling seat 17 and the leveling seat 2 are provided with a separate control plate 112 on the side near the center of the leveling short section body 11. The control plate 112 can slide along the radial direction of the leveling short section body 11. Both the leveling seat 17 and the leveling seat 2 are provided with a return spring 1, and the other end of each return spring 1 is connected to the leveling short section body 11.

[0038] Preferably, the leveling seat 17 is located above the leveling seat 2 19.

[0039] like Figure 2 As shown, leveling seat 17 and leveling seat 2 19 are both radially sealed and slidably disposed on one side of leveling short section body 11; leveling roller 18 is rotatably disposed in leveling seat 17, and leveling tooth 110 is fixed in leveling seat 2 19.

[0040] Both leveling seat 17 and leveling seat 2 19 have a separate control plate 112 on the side near the center of the leveling short section body 11. The control plate 112 can slide radially along the leveling short section body 11, and this sliding action is controlled by a telescopic device installed in the leveling short section body 11, thereby controlling the leveling roller 18 or the leveling tooth 110 to extend out of or be concealed in the leveling short section body 11. When the leveling roller 18 or the leveling tooth 110 extends out of the leveling short section body 11, the axial movement of the leveling short section body 11 itself drives the leveling roller or the leveling tooth to perform a leveling action. Both leveling seat 17 and leveling seat 2 19 are equipped with a return spring 1, the other end of which is connected to the leveling short section body 11.

[0041] Preferably, the assembly further includes a leveling reinforcement component, which includes a bearing housing 12, a limiting rod 13, a motor 14, and a leveling oscillator 16. There are two bearing housings 12, which are axially symmetrically fixed in the upper part of the leveling short section body 11. The bearing housings 12 are provided with flow holes. The motor 14 is located in the upper end of the leveling short section body 11. The lower end of the motor 14 is connected to a lead screw. The lower end of the lead screw is connected to a lead screw nut. The lead screw nut is connected to a sliding sleeve 15 through a rod body. The sliding sleeve 15 is slidably sleeved on the limiting rod 13. The limiting rod 13 is arranged parallel to the lead screw, and its upper end is connected to the bearing housing 12.

[0042] Preferably, the leveling oscillator 16 is fixed on the nut seat, and the output end of the leveling oscillator 16 passes through the hole on the control plate 112 and contacts the leveling seat 17 or the leveling seat 19.

[0043] In this invention, two sets of bearing seats 12 are symmetrically fixed in the leveling short section body 11. Each set of bearing seats 12 is rotatably equipped with a parallel arrangement of limiting rods 13 and lead screws. The rotation of the lead screws is driven by a motor 14, and a lead screw nut is connected to the lead screw.

[0044] In this invention, one end of the nut seat is connected to the sliding sleeve 15 via a rod, and the sliding sleeve 15 is slidably fitted onto the limiting rod 13; the other end of the nut seat is fixed with a leveling oscillator 16. The output end of the leveling oscillator 16 can pass through the hole on the control plate 112 and contact the first leveling seat 17 or the second leveling seat 19. During operation, the output end of the leveling oscillator 16 first contacts the second leveling seat 19 and then contacts the first leveling seat 17, thereby improving the leveling efficiency of the leveling assembly, reducing the impact of bends on the overall drill rod, and improving the drag reduction and friction reduction effect.

[0045] In this invention, the bearing housing 12 is provided with flow holes for water to pass through, thereby providing hydrodynamic power for the oscillation friction reduction component 2.

[0046] Preferably, one end of the leveling short section body 11 forms a hinged inner cylinder for hinged connection with the flexible connecting section 3, and the other end forms a hinged outer cylinder for hinged connection with the vibration friction reduction component 2. A main valve 113 is provided at the end of the leveling short section body 1 that forms the hinged inner cylinder.

[0047] Preferably, the oscillation friction reduction component 2 includes an oscillation sub-body 21, a slide groove 22, a push plate 23, and a hydraulic drive component. The oscillation sub-body 21 has multiple slide grooves 22 extending radially along its circumference. The push plate 23 is slidably disposed in the slide grooves 22, and the radial sliding of the push plate 23 is driven by the hydraulic drive component.

[0048] In this invention, a pusher plate 23 is slidably arranged in the chute 22. The radial sliding action of the pusher plate 23 is driven by the hydraulic drive component, thereby realizing its own radial oscillation through the pusher plate 23 and improving the static friction between it and the well wall.

[0049] Preferably, the hydraulic drive assembly includes a rotary valve 24, an adapter rod 25, a connecting rod 26, a rotor 27, and a stator 28. The rotary valve 24 is located inside the oscillating sub-body 21, and a through hole is provided on the rotary valve 24. The adapter rod 25 is coaxially fixed to one end of the rotary valve 24 away from the slide groove 22. The adapter rod 25 is hinged to the connecting rod 26. The other end of the connecting rod 26 is coaxially fixed to the rotor 27. The rotor 27 is drively connected to the stator 28. The stator 28 is fixed inside the connecting sub-section 29. One end of the connecting sub-section 29 is hinged to the oscillating sub-body 21, and the other end is hinged to the leveling and friction-reducing assembly 1. A support rod 210 is inclined between the adapter rod 25 and the inner wall of the oscillating sub-body 21.

[0050] In this invention, the rotary valve 24 rotates inside the oscillating section body 21, and a through-hole is provided on the rotary valve 24. The rotation of the rotary valve 24 allows water to be supplied to each slide 22 sequentially. In this invention, the adapter rod 25 is supported by the support rod 210.

[0051] Preferably, a driven bevel gear is coaxially arranged on the adapter rod 25, the driven bevel gear meshes with the driving bevel gear, the driving bevel gear is fixed at the output end of the second motor 211, and the second motor 211 is fixed inside the oscillating short section body 21.

[0052] In this invention, motor 211 is fixed on the oscillation short section body 21 as rotation compensation.

[0053] Preferably, the push plate 23 is concave, and a hydraulic telescopic rod is provided in the slide groove 22. The hydraulic telescopic rod is in contact with the concave part of the push plate 23. Multiple return springs are provided between the push plate 23 and the slide groove 22.

[0054] like Figure 3 As shown, in this invention, the slide groove 22 is also equipped with a hydraulic telescopic rod for quantitatively driving the push plate 23 to slide; the push plate 23 is driven to slide to the desired position according to the required driving amount. In implementation, one or two sets of hydraulic telescopic rods extend, so that the push plate 23 can be used to abut against the well wall to achieve quantitative deflection of the borehole.

[0055] Preferably, the oscillating sub body 21 has a collecting groove 213 in the middle of one end of the sliding groove 22. The collecting groove 213 is connected to the sliding groove 22 by a manifold 212, and a plurality of drain pipes 214 are provided on the collecting groove 213.

[0056] In this invention, the drain pipe 214 is used to drain the water therein to the external annulus.

[0057] In a specific implementation of this invention, the leveling and friction-reducing component 1 and the oscillating friction-reducing component 2 are hinged together and arranged at one end of the flexible connecting joint 3. The flexible connecting joint 3 is used to transmit drilling pressure, while the drill bit is installed at the end of the oscillating friction-reducing component 2 away from the flexible connecting joint 3. When deflection is required during drilling, the main valve 113 is kept closed, and one or two sets of hydraulic telescopic rods are extended, so that the push plate 23 can be used to abut against the well wall to achieve quantitative deflection of the borehole. Then, the hydraulic telescopic rods are closed and the main valve 113 is opened, so that the water flows through the flexible connecting joint 3 and the leveling and friction-reducing component 1 in sequence, thereby driving the rotor 2. 7 and the rotary valve 24 rotate. The rotation of the rotary valve 24 can provide water to each slide 22 in sequence, thereby driving the push plate 23 to slide radially and thus realize its own radial oscillation, improving the static friction between it and the well wall. In addition, by utilizing the axial movement of the leveling short section body 11 itself, it can drive the leveling roller 18 or leveling tooth 110 to perform leveling action. During operation, the output end of the leveling oscillator 16 first contacts the leveling seat 2 19 and then contacts the leveling seat 17, thereby improving the leveling efficiency of the leveling assembly, reducing the impact of the bend on the overall drill pipe, and improving the effect of drag reduction and friction reduction.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention. Device structures and method steps not described in detail in this invention are all prior art and will not be further described in this invention.

Claims

1. A drag-reducing and friction-reducing device for drilling tight shale oil extraction, characterized in that: The assembly includes a leveling and friction-reducing component (1) and an oscillating and friction-reducing component (2). The leveling and friction-reducing component (1) is located above the oscillating and friction-reducing component (2). The leveling and friction-reducing component (1) includes at least a leveling component that can act on the inner wall of the borehole for crushing and leveling the inner wall of the borehole. The oscillating and friction-reducing component (2) can drive itself to oscillate axially. The leveling component includes a leveling seat one (17), a leveling roller (18), a leveling seat two (19), a leveling tooth (110), and a telescopic device (111). The leveling seat one (17) and the leveling seat two (19) are located on the same side of the leveling short section body (11). The leveling seat one (17) and the leveling seat two (19) both slide in a sealed manner along the radial direction of the leveling short section body (11). The first leveling seat (17) is provided with a leveling roller (18), and the second leveling seat (19) is fixedly provided with a leveling tooth (110). Both the leveling seat one (17) and the leveling seat two (19) are provided with a separate control plate (112) on the side near the center of the leveling short section body (11). The control plate (112) can slide along the radial direction of the leveling short section body (11). Both the leveling seat one (17) and the leveling seat two (19) are provided with a return spring one, and the other end of each return spring one is connected to the leveling short section body (11). It also includes a leveling reinforcement component, which includes a bearing housing (12), a limiting rod (13), a motor (14), and a leveling oscillator (16). There are two bearing housings (12), which are axially symmetrically fixed in the upper part of the leveling short section body (11). The bearing housings (12) are provided with flow holes. The motor (14) is located in the upper end of the leveling short section body (11). The lower end of the motor (14) is connected to a lead screw. The lower end of the lead screw is connected to a lead screw nut. The lead screw nut is connected to a sliding sleeve (15) through a rod body. The sliding sleeve (15) is slidably sleeved on the limiting rod (13). The limiting rod (13) is parallel to the lead screw and its upper end is connected to the bearing housing (12). The leveling oscillator (16) is fixed on the nut seat, and the output end of the leveling oscillator (16) passes through the hole on the control plate (112) and contacts the leveling seat one (17) or the leveling seat two (19).

2. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 1, characterized in that: The leveling seat one (17) is located above the leveling seat two (19).

3. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 1, characterized in that: One end of the leveling short section body (11) forms a hinged inner cylinder, which is hinged to a flexible connecting section (3), and the other end forms a hinged outer cylinder, which is used to be hinged to the oscillation friction reduction component (2). A main valve (113) is provided at one end of the leveling short section body (11) that forms the hinged inner cylinder.

4. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 1, characterized in that: The oscillation friction reduction component (2) includes an oscillation subbody (21), a chute (22), a pusher plate (23), and a hydraulic drive component. The oscillation subbody (21) has multiple chutes (22) extending radially along the circumference of the oscillation subbody (21). The pusher plate (23) is slidably disposed in the chute (22). The radial sliding of the pusher plate (23) is driven by the hydraulic drive component.

5. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 4, characterized in that: The hydraulic drive assembly includes a rotary valve (24), a transition rod (25), a connecting rod (26), a rotor (27), and a stator (28). The rotary valve (24) is located inside the oscillating subbody (21), and a through hole is provided on the rotary valve (24). The rotary valve (24) is coaxially fixed with an adapter rod (25) at one end away from the slide groove (22). The adapter rod (25) is hinged to the connecting rod (26). The other end of the connecting rod (26) is coaxially fixed to the rotor (27). The rotor (27) is connected to the stator (28) in a transmission. The stator (28) is fixed inside the connecting short section (29). One end of the connecting short section (29) is hinged to the oscillating short section body (21), and the other end is hinged to the leveling and friction-reducing assembly (1). A support rod (210) is inclined between the adapter rod (25) and the inner wall of the oscillating short section body (21).

6. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 5, characterized in that: A driven bevel gear is coaxially arranged on the adapter rod (25). The driven bevel gear meshes with the driving bevel gear. The driving bevel gear is fixed at the output end of the second motor (211). The second motor (211) is fixed inside the oscillating short section body (21).

7. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 4, characterized in that: The push plate (23) is concave, and a hydraulic telescopic rod is provided in the slide groove (22). The hydraulic telescopic rod is in contact with the concave part of the push plate (23). Multiple return springs are provided between the push plate (23) and the slide groove (22).

8. The drag reduction and friction reduction device for drilling tight oil shale oil extraction according to claim 4, characterized in that: The oscillating short section body (21) has a collection groove (213) in the middle of one end of the sliding groove (22). The collection groove (213) is connected to the sliding groove (22) by a manifold (212). Multiple drain pipes (214) are provided on the collection groove (213).

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