Horizontal well friction-reducing vibration experimental device

Abstract

The application provides a horizontal well friction-reducing vibration experiment device, and belongs to the technical field of oil and gas drilling tools, and comprises a simulated wellbore, a simulated pipe string is arranged in the simulated wellbore, a gravity source is connected to one end of the simulated pipe string, a circumferential vibration module is arranged on the simulated pipe string, the circumferential vibration module comprises a rotor and a stator, a plurality of movable flow channels are arranged between the rotor and the stator, a plurality of oil inlet flow channels and a plurality of reversing flow channels are arranged on the rotor, the reversing flow channels are communicated with the oil inlet flow channels, and the reversing flow channels and the oil inlet flow channels control rotation of the rotor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas drilling tools, in particular to a horizontal well friction reduction and vibration experimental device. BACKGROUND

[0002] With the continuous development of global major oil fields and the requirement for the continuous progress of oil exploitation technology, especially the continuous change of the exploitation technology of branch wells, it becomes the top priority to reduce the energy loss of the horizontal well section to improve the drilling efficiency.

[0003] The biggest obstacle of the horizontal well is the large frictional resistance between the drill string and the well wall, which causes huge loss of the drilling pressure in the transmission process, resulting in the reduction of the drilling efficiency. In addition, the longer the horizontal section is, the more the drilling cost and risk increase; at the same time, the phenomena of supporting pressure and stick-slip are more likely to occur, which limits the extension of the length of the horizontal section. In recent years, many downhole special tools have appeared, which apply a certain frequency of low amplitude vibration to the downhole pipe string, and the vibration friction reduction principle reduces the loss of the drilling pressure in the transmission process, which improves the drilling efficiency to a certain extent.

[0004] However, under the complex environment of the horizontal well, the optimal placement position and the best vibration frequency and amplitude of the vibration device are difficult to determine, and the friction reduction effect cannot be roughly understood in advance. SUMMARY

[0005] The purpose of the present application is to provide a horizontal well friction reduction and vibration experimental device, which solves the technical problem that the optimal placement position and the best vibration frequency and amplitude of the vibration device are difficult to determine under the complex environment of the horizontal well in the prior art, and the friction reduction effect cannot be roughly understood in advance.

[0006] The present application discloses a horizontal well friction reduction and vibration experimental device, which comprises a simulation wellbore, a simulation pipe string is arranged in the simulation wellbore, one end of the simulation pipe string is connected with a gravity source, a circumferential vibration module is arranged on the simulation pipe string, the circumferential vibration module comprises a rotor and a stator, a plurality of movable flow channels are arranged between the rotor and the stator, a plurality of oil inlet flow channels and a plurality of reversing flow channels are arranged on the rotor, the reversing flow channels are communicated with the oil inlet flow channels, and the reversing flow channels and the oil inlet flow channels control the rotation of the rotor.

[0007] Working principle:

[0008] By arranging the circumferential vibration module, the circumferential vibration generated during drilling is simulated to drive the drill rod to form circumferential vibration. The technical problem that the optimal placement position and the best vibration frequency and amplitude of the vibration device are difficult to determine under the complex environment of the horizontal well in the prior art, and the friction reduction effect cannot be roughly understood in advance, is solved.

[0009] Further, the reversing flow channels are at least 2.

[0010] Further, the reversing flow channel is 4.

[0011] Further, the oil inlet flow channel is at least 1.

[0012] Further, the oil inlet flow channel is 2.

[0013] Further, the two oil inlet flow channels are arranged in an X shape in the rotor.

[0014] Further, a circumferential oil outlet is arranged between the rotor and the stator.

[0015] Further, the circumferential oil outlet is at least two.

[0016] By arranging multiple circumferential oil outlets, the reversing channel can control the rotation of the rotor through different oil outlets.

[0017] Further, a blocking member is arranged between the stator and the rotor, and the blocking member is used to close the oil outlet of the oil inlet flow channel.

[0018] By arranging the blocking member, the blocking member can close part of the oil inlet flow channel, so that part of the reversing flow channel can be connected with the oil outlet. The unblocked oil inlet flow channel is connected with the movable flow channel to continuously output oil, realizing the driving of the rotor.

[0019] Further, the blocking member is fixedly connected with the stator.

[0020] Further, the blocking member is part of the stator.

[0021] Further, the reversing flow channel is arc-shaped, one end of the reversing flow channel is connected with the oil outlet, and the other end is connected with the movable flow channel, or one end of the reversing flow channel is connected with the movable flow channel, and the other end is closed by the blocking member.

[0022] When the circumferential vibration module works, one of the two oil inlet flow channels is connected with the movable flow channel, and the other is blocked by the blocking member and cannot output hydraulic oil; as the rotation angle changes, the blocked oil inlet flow channel is connected with the movable flow channel, and the oil inlet flow channel connected with the movable flow channel before is blocked, completing the reversing of oil inlet and outlet, and generating circumferential vibration at the same time.

[0023] Further, the center of the rotor is a circumferential oil inlet, which is connected with the oil inlet flow channel.

[0024] Further, an axial vibrator is arranged on one side of the analog pipe column of the circumferential vibration module.

[0025] Further, the axial vibrator is provided with an axial oil inlet at one end and an axial oil outlet at the other end, and the axial oil inlet is larger than the axial oil outlet.

[0026] By setting the axial oil inlet larger than the axial oil outlet, the axial oil inlet has a lower working pressure, a lower allowed hydraulic oil flow rate, and the pressure at the axial oil outlet can be increased.

[0027] Further, the axial vibrator is internally provided with a cam transmission structure.

[0028] Further, the cam transmission structure comprises a power device, the power device is connected with an eccentric wheel, and the eccentric wheel is connected with the simulated pipe column.

[0029] By setting the power device, the eccentric wheel can be driven to rotate, and the eccentric wheel drives the simulated pipe column to move axially during movement.

[0030] Further, the power device is a vane.

[0031] By setting the vane, the vane can be driven to rotate by hydraulic oil to provide power for the cam transmission structure.

[0032] Further, the vane is connected with a bevel gear.

[0033] By setting the bevel gear, power generated by rotation of the vane can be transmitted to the cam transmission structure.

[0034] Further, the cam transmission structure is provided with a guide block for limiting circumferential movement of the cam transmission structure.

[0035] By setting the guide block, the cam transmission structure can only move axially, and also plays a role in bearing.

[0036] Compared with the prior art, the present application has the beneficial effects that:

[0037] 1. By setting the circumferential vibration module, the circumferential vibration generated during drilling is simulated to drive the drill pipe to form circumferential vibration;

[0038] 2. By setting a plurality of circumferential oil outlets, the reversing channel can control the rotation of the rotor through different oil outlets;

[0039] 3. By setting the blocking piece, the blocking piece can close part of the oil inlet flow channel, so that part of the reversing flow channel can be communicated with the oil outlet, the unblocked oil inlet flow channel is communicated with the movable flow channel to continuously discharge oil, and the driving of the rotor is realized;

[0040] 4. By setting the axial oil inlet larger than the axial oil outlet, the axial oil inlet has a lower working pressure, a lower allowed hydraulic oil flow rate, and the pressure at the axial oil outlet can be increased.

[0041] 5. By setting up a power device, the eccentric wheel can be driven to rotate, and the eccentric wheel drives the simulated tubular column to move axially during the movement;

[0042] 6. By setting blades, the blades can rotate under the drive of hydraulic oil to provide power for the cam drive structure;

[0043] 7. By setting bevel gears, the power generated by the rotation of the blades can be transmitted to the cam drive structure;

[0044] 8. By setting guide blocks, the cam drive structure can only move axially, and at the same time, it also serves as a load-bearing component. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the horizontal well friction reduction vibration experimental device of the present invention;

[0047] Figure 2 This is a schematic diagram of the circumferential vibration module structure of the present invention;

[0048] Figure 3 This is a schematic diagram of the axial vibrator of the present invention;

[0049] Figure 4 This is a schematic diagram of the experimental method of the present invention.

[0050] In the diagram: 1-Simulated wellbore, 2-Simulated tubing string, 3-Gravity source, 4-Circumferential vibration module, 5-Rotor, 6-Stator, 7-Moving flow channel, 8-Inlet flow channel, 9-Reversing flow channel, 10-Circumferential outlet, 11-Sealing component, 12-Circumferential inlet, 13-Axial vibrator, 14-Axial inlet, 15-Axial outlet, 16-Cam drive structure, 17-Eccentric wheel, 18-Blade, 19-Bevel gear, 20-Guide block. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0052] Example 1

[0053] A horizontal well friction reduction vibration experimental device, the structure of which is as follows: Figures 1-4 As shown, the system includes a simulated wellbore 1, a simulated tubing string 2 inside the simulated wellbore 1, a gravity source 3 connected to one end of the simulated tubing string 2, a circumferential vibration module 4 on the simulated tubing string 2, the circumferential vibration module 4 including a rotor 5 and a stator 6, multiple movable flow channels 7 between the rotor 5 and the stator 6, multiple oil inlet flow channels 8 and multiple reversing flow channels 9 on the rotor 5, the reversing flow channels 9 communicating with the oil inlet flow channels 8, and the reversing flow channels 9 and the oil inlet flow channels 8 controlling the rotation of the rotor 5.

[0054] Working principle:

[0055] By setting up a circumferential vibration module 4, the circumferential vibration generated during drilling is simulated, causing the drill pipe to vibrate circumferentially. This solves the technical problem in existing technologies where the optimal placement position, optimal vibration frequency, and amplitude of the vibration device are difficult to determine in complex horizontal downhole environments, and the friction reduction effect cannot be roughly known in advance.

[0056] Example 2

[0057] As a preferred embodiment of the invention, its structure is as follows: Figures 1-4 As shown, the only changes based on Embodiment 1 are: there are 4 reversing channels 9 and 2 oil inlet channels 8. The 2 oil inlet channels 8 are arranged in an X-shape within the rotor 5. There are two circumferential oil outlets 10 between the rotor 5 and the stator 6. A sealing member 11 is provided between the stator 6 and the rotor 5. The sealing member 11 is used to close the oil outlet of the oil inlet channel 8.

[0058] By setting multiple circumferential oil outlets 10, the reversing channel can control the rotor 5 to rotate through different oil outlets.

[0059] By setting the sealing component 11, the sealing component 11 can close part of the oil inlet channel 8, so that part of the reversing channel 9 can be connected to the oil outlet. The unclosed oil inlet channel 8 is connected to the moving channel 7 to continuously output oil, thereby driving the rotor 5.

[0060] Example 3

[0061] As a preferred embodiment of the invention, the only change from embodiment 2 is that the sealing member 11 is fixedly connected to the stator 6.

[0062] Example 4

[0063] As a preferred embodiment of the invention, the only change from embodiment 2 is that the sealing element 11 is part of the stator 6.

[0064] Example 5

[0065] As a preferred embodiment of the invention, its structure is as follows: Figures 1-4 As shown, the only changes based on Embodiment 2 are: the reversing flow channel 9 is arc-shaped, one end of the reversing flow channel 9 is connected to the circumferential oil outlet 10 and the other end is connected to the movable flow channel 7, or one end of the reversing flow channel 9 is connected to the movable flow channel 7 and the other end is sealed by the sealing member 11, the center of the rotor 5 is the circumferential oil inlet 12, and the circumferential oil inlet 12 is connected to the oil inlet flow channel 8.

[0066] When the circumferential vibration module 4 is working, one of the two oil inlet channels 8 is connected to the movable channel 7, while the other is blocked by the sealing component 11 and cannot output hydraulic oil. As the rotation angle changes, the blocked oil inlet channel 8 and the movable channel 7 will be connected, and the oil inlet channel 8 that was previously connected to the movable channel 7 will be blocked, completing the reversal of oil inlet and outlet, and generating circumferential vibration at the same time.

[0067] Example 6

[0068] As a preferred embodiment of the invention, its structure is as follows: Figures 1-4 As shown, the only change based on Embodiment 1 is that an axial vibrator 13 is provided on the simulated column 2 on one side of the circumferential vibration module 4. One end of the axial vibrator 13 is provided with an axial oil inlet 14, and the other end is provided with an axial oil outlet 15. The axial oil inlet 14 is larger than the axial oil outlet 15.

[0069] By setting the axial oil inlet 14 to be larger than the axial oil outlet 15, the working pressure of the axial oil inlet 14 is lower, the allowable hydraulic oil flow rate is lower, and the pressure at the axial oil outlet 15 can be increased.

[0070] Example 7

[0071] As a preferred embodiment of the invention, its structure is as follows: Figures 1-4 As shown, the only change from embodiment 6 is that the axial vibrator 13 is provided with a cam transmission structure 16, the cam transmission structure 16 includes a power device, the power device is connected to an eccentric wheel 17, the eccentric wheel 17 is connected to the simulated column 2, the power device is a blade 18, the blade 18 is connected to a bevel gear 19, and the cam transmission structure 16 is provided with a guide block 20 for limiting the circumferential movement of the cam transmission structure 16.

[0072] By setting up a power device, the eccentric wheel 17 can be driven to rotate, and the eccentric wheel 17 drives the simulated tube column 2 to move axially during the movement.

[0073] By setting the blade 18, the blade 18 can rotate under the drive of hydraulic oil to provide power to the cam transmission structure 16.

[0074] By setting the bevel gear 19, the power generated by the rotation of the blade 18 can be transmitted to the cam drive structure 16.

[0075] By setting the guide block 20, the cam transmission structure 16 can only move axially, and at the same time, it also serves as a load-bearing component.

[0076] The above are the embodiments listed in this example. However, this example is not limited to the optional embodiments described above. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can derive other various forms of embodiments based on the inspiration of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example. The scope of protection of this example should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. A horizontal well friction reduction vibration experimental device, characterized in that: The system includes a simulated wellbore (1), a simulated tubing string (2) is provided inside the simulated wellbore (1), a gravity source (3) is connected to one end of the simulated tubing string (2), a circumferential vibration module (4) is provided on the simulated tubing string (2), the circumferential vibration module (4) includes a rotor (5) and a stator (6), multiple movable flow channels (7) are provided between the rotor (5) and the stator (6), multiple oil inlet flow channels (8) and multiple reversing flow channels (9) are provided on the rotor (5), the reversing flow channels (9) are connected to the oil inlet flow channels (8), and the reversing flow channels (9) and the oil inlet flow channels (8) control the rotation of the rotor (5); A sealing element (11) is provided between the stator (6) and the rotor (5), and the sealing element (11) is used to close the oil inlet channel (8).

2. The horizontal well friction reduction vibration test device according to claim 1, characterized in that: There are at least two reversing channels (9).

3. The horizontal well friction reduction vibration test device according to claim 1, characterized in that: There is at least one oil inlet channel (8).

4. The horizontal well friction reduction vibration test device according to claim 3, characterized in that... There are two oil inlet channels (8).

5. The horizontal well friction reduction vibration test device according to claim 4, characterized in that: The two oil inlet channels (8) are arranged in an X-shape within the rotor (5).

6. The horizontal well friction reduction vibration test device according to claim 1, characterized in that: A circumferential oil outlet (10) is provided between the rotor (5) and the stator (6).

7. The horizontal well friction reduction vibration test device according to claim 1, characterized in that: The rotor (5) has a circumferential oil inlet (12) at its center, and the circumferential oil inlet (12) is connected to the oil inlet channel (8).

8. The horizontal well friction reduction vibration test device according to claim 1, characterized in that: An axial vibrator (13) is installed on the simulated column (2) on one side of the circumferential vibration module (4).

9. The horizontal well friction reduction vibration test device according to claim 8, characterized in that: The axial vibrator (13) has an axial oil inlet (14) at one end and an axial oil outlet (15) at the other end, with the axial oil inlet (14) being larger than the axial oil outlet (15).

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