CN215485870U - Directional drilling device - Google Patents
Directional drilling device Download PDFInfo
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- CN215485870U CN215485870U CN202120868456.5U CN202120868456U CN215485870U CN 215485870 U CN215485870 U CN 215485870U CN 202120868456 U CN202120868456 U CN 202120868456U CN 215485870 U CN215485870 U CN 215485870U
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Abstract
The utility model discloses a directional drilling device, which comprises a drilling tool and a ground controller, wherein the drilling tool comprises an upper transmission shaft assembly, an upper cardan shaft assembly, a straight shell, an upper screw motor stator and rotor and a measurement while drilling system, the upper part of an upper mandrel is used for being fixedly connected with a drill string and a top driver, the lower part of the upper mandrel is fixedly connected with an upper rotor through the upper cardan shaft assembly, the lower part of the lower rotor is connected with the upper part of a lower mandrel through the lower cardan shaft assembly, the lower part of the lower mandrel is connected with the drill bit, the upper transmission shaft housing is connected with the upper part of an upper stator through a straight housing, the lower part of the upper stator is connected with the upper part of a lower stator through a measurement while drilling system, the lower part of the lower stator is connected with the upper part of a lower transmission shaft housing through a bent housing, the measurement while drilling system is in communication connection with a ground controller, and the ground controller can control the rotating speed of the top driver.
Description
Technical Field
The utility model relates to the technical field of petroleum drilling, in particular to a directional drilling device.
Background
With the development of petroleum drilling technology, directional well and horizontal well technologies have become the main means for exploiting oil and gas reservoirs. However, when directional drilling is performed, if a conventional bent screw motor is used, the drill string at the upper part of the bent screw motor needs to be kept in a non-rotating state, so that the friction force applied to the upper drill string and the lower drill assembly in the drilling process is increased, the pressure supporting phenomenon is caused, and the drilling speed is greatly limited. If a rotary steering tool is used, the upper drill string can be rotated by a miniature electro-hydraulic system on the downhole drilling tool, and meanwhile, the lower drilling tool is kept deflecting along a certain specific direction. But the use and maintenance costs of rotary steerable tools are extremely high, greatly increasing the cost of drilling. Chinese patent publication No. CN208040307U provides a simple pure mechanical rotary steering tool, in which a reverse rotation straight-casing screw motor is connected to the upper part of a conventional bent screw motor, and the rotation speed of a drill string is controlled on the ground so that the forward rotation speed of the drill string is equal to the reverse rotation speed of the straight-casing screw motor, and at this time, the bent screw motor can realize the directional function while keeping the upper drill string rotating. However, the scheme adopts the reverse screw motor, the upper screw motor and the lower screw motor respectively adopt the left screw and the right screw, and the procedures of manufacturing the stator mold core and the like need to be added, so that the cost of the tool is greatly increased, and the usability of the product is also reduced by utilizing the mode of controlling the rotating speed of the drill rod by the artificial ground.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: aiming at the problems in the prior art, the directional drilling device is provided, the same directional drilling function is realized by reversely mounting the upper screw rod, the production cost of the drilling tool is greatly reduced, the stability of the drilling tool is kept by the ground controller, and the directional precision of the drilling tool is greatly improved.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a directional drilling device comprises a drilling tool and a surface controller,
the well drilling tool comprises an upper transmission shaft assembly, an upper universal shaft assembly, a straight shell, an upper screw motor stator and rotor, a measurement while drilling system, a lower screw motor stator and rotor, a lower universal shaft assembly, a bent shell, a lower transmission shaft assembly and a drill bit,
the upper transmission shaft assembly comprises an upper mandrel and an upper transmission shaft shell, the upper screw motor stator and rotor comprises an upper rotor and an upper stator, the lower screw motor stator and rotor comprises a lower rotor and a lower stator, the lower transmission shaft assembly comprises a lower mandrel and a lower transmission shaft shell,
the upper part of the upper mandrel is fixedly connected with a drill string and a top drive, the lower part of the upper mandrel is fixedly connected with the upper rotor through the upper cardan shaft assembly, the lower part of the lower rotor is connected with the upper part of the lower mandrel through the lower cardan shaft assembly, and the lower part of the lower mandrel is connected with the drill bit,
the upper transmission shaft shell is connected with the upper part of the upper stator through the straight shell, the lower part of the upper stator is connected with the upper part of the lower stator through the measurement while drilling system, the lower part of the lower stator is connected with the upper part of the lower transmission shaft shell through the bent shell,
the measurement while drilling system is in communication connection with the ground controller, and the ground controller can control the rotating speed of the top drive.
The working principle of the utility model is as follows:
the top drive can drive the upper mandrel to rotate through a drill column connected with the lower portion, high-pressure mud pumped by the mud pump can drive the upper screw motor stator and rotor and the lower screw motor stator and rotor to rotate and output torque, a measurement while drilling system can transmit tool face information to a ground controller by using mud pulses in the drill column, the ground controller compares preset tool face parameters with received underground tool face information, and the top drive rotating speed and/or pump displacement are/is reasonably adjusted according to the difference value, the difference value change speed and the like of the preset tool face parameters and the underground tool face information, so that the tool face is corrected.
The mode of adjusting the top drive rotating speed and the pump displacement can realize the correction of the tool surface, and the tool surface can be simultaneously applied and can also be selected according to the actual situation in the practical application.
The upper screw motor stator and the rotor are reversely arranged, and the upper rotor is fixedly connected with the upper mandrel and the drill string on the upper mandrel through the upper cardan shaft assembly, so that the upper screw motor and the lower screw motor can adopt screws with the same rotation angle, such as both left-handed rotation or both right-handed rotation, and the production cost of the drilling tool is greatly reduced. In addition, the stability of the drilling tool is kept through the ground controller, and the orientation precision of the drilling tool is greatly improved.
As a preferable aspect of the present invention, the upper cardan shaft assembly includes an upper bearing connecting rod and an upper rotor connecting rod, the upper bearing connecting rod is fixedly connected to a lower portion of the upper spindle, and the upper rotor connecting rod is fixedly connected to the upper rotor.
As a preferable scheme of the present invention, the lower cardan shaft assembly includes a lower rotor connecting rod and a lower bearing connecting rod, the lower rotor connecting rod is fixedly connected with the lower rotor, and the lower bearing connecting rod is fixedly connected with the lower spindle.
As a preferable scheme of the utility model, the fixed connection mode is a threaded connection, and the device is more suitable for a downhole environment.
As the preferable scheme of the utility model, the ground controller comprises a PLC controller, and the control precision is higher. Other controllers which can be applied to industrial personal computers, single-chip microcomputers and the like can also be applied to the ground controller as long as the control function can be realized.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. the upper screw motor stator and the rotor are reversely arranged, and the upper rotor is fixedly connected with the upper mandrel and the drill string on the upper mandrel through the upper cardan shaft assembly, so that the upper screw motor and the lower screw motor can adopt screws with the same rotation angle, such as left-handed rotation or right-handed rotation, and the production cost of a drilling tool is greatly reduced;
2. the utility model keeps the stability of the drilling tool through the ground controller, and greatly improves the orientation precision of the drilling tool.
Drawings
FIG. 1 is a schematic representation of the construction of a well tool according to example 1 of the present invention.
Fig. 2 is a schematic structural diagram of an upper drive shaft assembly, an upper cardan shaft assembly, a straight housing, and an upper screw motor stator and rotor according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of a measurement while drilling system according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of a lower screw motor stator and rotor, a lower cardan shaft assembly, a bent housing, a lower transmission shaft assembly, and a drill bit according to embodiment 1 of the present invention.
Fig. 5 is a control flow chart of the drilling device according to embodiment 1 of the present invention.
Fig. 6 is a control schematic diagram of a drilling apparatus according to embodiment 1 of the present invention.
Icon: 1-upper drive shaft assembly, 11-upper spindle, 12-upper drive shaft housing, 2-upper cardan shaft assembly, 21-upper bearing connecting rod, 22-upper rotor connecting rod, 3-straight housing, 4-upper screw motor stator-rotor, 41-upper rotor, 42-upper stator, 5-measurement while drilling system, 6-lower screw motor stator-rotor, 61-lower rotor, 62-lower stator, 7-lower cardan shaft assembly, 71-lower rotor connecting rod, 72-lower bearing connecting rod, 8-bent housing, 9-lower drive shaft assembly, 91-lower spindle, 92-lower drive shaft housing, 10-drill bit.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example 1
A directional drilling apparatus includes a drilling tool and a surface controller.
As shown in fig. 1-4, the drilling tool comprises an upper transmission shaft assembly 1, an upper cardan shaft assembly 2, a straight housing 3, an upper screw motor stator and rotor 4, a measurement-while-drilling system 5, a lower screw motor stator and rotor 6, a lower cardan shaft assembly 7, a bent housing 8, a lower transmission shaft assembly 9 and a drill bit 10.
The upper transmission shaft assembly 1 comprises an upper spindle 11 and an upper transmission shaft shell 12, wherein the upper spindle 11 is positioned in the upper transmission shaft shell 12. The upper cardan shaft assembly 2 comprises an upper bearing connecting rod 21 and an upper rotor connecting rod 22 which are fixedly connected, and the upper bearing connecting rod 21 is located above the upper rotor connecting rod 22. The upper screw motor stator and rotor 4 comprises an upper rotor 41 and an upper stator 42, and the upper rotor 41 is positioned in the upper stator 42. The lower screw motor stator and rotor 6 comprises a lower rotor 61 and a lower stator 62, and the lower rotor 61 is positioned in the lower stator 62. The lower cardan shaft assembly 7 comprises a fixedly connected lower rotor connecting rod 71 and a lower bearing connecting rod 72, and the lower rotor connecting rod 71 is located above the lower bearing connecting rod 72. The lower transmission shaft assembly 9 comprises a lower spindle 91 and a lower transmission shaft housing 92, the lower spindle 91 being located within the lower transmission shaft housing 92.
The upper end of the upper mandrel 11 is connected with a top drive through a drill string at the upper part of the upper mandrel, the lower end of the upper mandrel 11 is in threaded connection with the upper bearing connecting rod 21, and the upper rotor connecting rod 22 is in threaded connection with the upper end of the upper rotor 41. The lower end of the upper transmission shaft housing 12 and the upper end of the upper stator 42 are connected through the straight housing 3. Two ends of the measurement while drilling system 5 are respectively connected with the lower end of the upper stator 42 and the upper end of the lower stator 62. The lower end of the lower rotor 61 is threadedly coupled to the lower rotor connecting rod 7, the lower bearing connecting rod 72 is threadedly coupled to the upper end of the lower spindle 91, and the lower end of the lower spindle 91 is threadedly coupled to the drill bit 10. The lower end of the lower stator 62 and the upper end of the lower transmission shaft housing 92 are connected by the bent housing 8.
As shown in fig. 6, the measurement while drilling system 5 is in communication connection with the surface controller, the surface controller is a PLC controller, and the surface controller controls the rotation speed of the top drive through a VFD room.
As shown in fig. 5, the directional drilling process: if the top drive speed is kept to be 0, the upper rotor 41 in the upper screw motor stator and rotor 4 is fixedly connected with the upper mandrel 11 and the drill string on the upper portion of the upper mandrel through the upper universal shaft assembly 2, so that the rotor 41 is fixed. After the pump is started, the upper stator 42 drives the casing 92 of the measurement while drilling system 5, the lower stator 62, the bent casing 8 and the lower transmission shaft assembly 9 on the lower portion to rotate counterclockwise at the speed R1, at this time, the top drive rotates clockwise at the speed R2, and when the speeds of R1 and R2 are equal, the upper stator 42 drives the casing 92 of the measurement while drilling system 5, the lower stator 62, the bent casing 8 and the lower transmission shaft assembly 9 on the lower portion to be stationary relatively to the ground. And because the lower stator 62 is stationary relative to the ground, the lower rotor 61 will output clockwise torque and rotational speed, and drive the drill bit 10 to break the rock.
The process of adjusting the tool surface:
if the difference between the tool surface information acquired by the measurement while drilling system 5 and the target tool surface is between-15 degrees and +15 degrees, the ground controller controls the top drive to keep the rotating speed R2 equal to the rotating speed R1 output by the upper stator 42. The tool surface can be stabilized;
if the difference between the tool face information acquired by the measurement-while-drilling system 5 and the target tool face is greater than +15 °, the ground controller controls the top drive to reduce the rotation speed or increase the mud pump displacement, so that R2 is slightly smaller than R1, at this time, the upper stator 42 drives the measurement-while-drilling system 5, the lower stator 62, the bent housing 8 and the housing 92 of the lower transmission shaft assembly 9 on the lower portion to rotate counterclockwise, and when the difference between the tool face information acquired by the measurement-while-drilling system 5 and the target tool face is less than +15 °, the ground controller increases the top drive rotation speed R2 or decreases the mud pump displacement, so that R2 and R1 are equal again, and the lower stator 62 is stationary relative to the ground again.
If the difference between the tool face information acquired by the measurement-while-drilling system 5 and the target tool face is smaller than-15 °, the ground controller controls the top drive to increase the rotation speed or decrease the mud pump displacement, so that R2 is slightly larger than R1, at this time, the upper stator 42 drives the measurement-while-drilling system 5, the lower stator 62, the bent housing 8 and the housing 92 of the lower transmission shaft assembly 9 on the lower portion to rotate clockwise, and when the difference between the tool face information acquired by the measurement-while-drilling system 5 and the target tool face is larger than-15 °, the ground controller decreases the top drive rotation speed R2 or increases the mud pump displacement, so that R2 and R1 are equal again, and the lower stator 62 is stationary relative to the ground again.
And (3) composite drilling:
the surface controller maintains the top drive clockwise speed R2 greater than the upper stator 42 counter clockwise speed R1 while the tool face is unstable so that compound drilling can occur.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A directional drilling device is characterized by comprising a drilling tool and a surface controller,
the well drilling tool comprises an upper transmission shaft assembly (1), an upper universal shaft assembly (2), a straight shell (3), an upper screw motor stator and rotor (4), a measurement while drilling system (5), a lower screw motor stator and rotor (6), a lower universal shaft assembly (7), a bent shell (8), a lower transmission shaft assembly (9) and a drill bit (10),
the upper transmission shaft assembly (1) comprises an upper mandrel (11) and an upper transmission shaft shell (12), the upper screw motor stator and rotor (4) comprises an upper rotor (41) and an upper stator (42), the lower screw motor stator and rotor (6) comprises a lower rotor (61) and a lower stator (62), the lower transmission shaft assembly (9) comprises a lower mandrel (91) and a lower transmission shaft shell (92),
the upper part of the upper mandrel (11) is fixedly connected with a drill string and a top drive, the lower part of the upper mandrel (11) is fixedly connected with the upper rotor (41) through the upper cardan shaft assembly (2), the lower part of the lower rotor (61) is connected with the upper part of the lower mandrel (91) through the lower cardan shaft assembly (7), and the lower part of the lower mandrel (91) is connected with the drill bit (10),
the upper transmission shaft housing (12) is connected with the upper part of the upper stator (42) through the straight housing (3), the lower part of the upper stator (42) is connected with the upper part of the lower stator (62) through the measurement while drilling system (5), the lower part of the lower stator (62) is connected with the upper part of the lower transmission shaft housing (92) through the bent housing (8),
the measurement while drilling system (5) is in communication connection with the ground controller, and the ground controller can control the rotating speed of the top drive.
2. A directional drilling arrangement according to claim 1, characterized in that the upper cardan shaft assembly (2) comprises an upper bearing connection rod (21) and an upper rotor connection rod (22), the upper bearing connection rod (21) being fixedly connected to the lower part of the upper spindle (11), the upper rotor connection rod (22) being fixedly connected to the upper rotor (41).
3. A directional drilling arrangement according to claim 1, characterized in that the lower cardan shaft assembly (7) comprises a lower rotor connecting rod (71) and a lower bearing connecting rod (72), the lower rotor connecting rod (71) being fixedly connected to the lower rotor (61), the lower bearing connecting rod (72) being fixedly connected to the lower spindle (91).
4. A directional drilling apparatus according to any one of claims 1 to 3, wherein the fixed connection is a threaded connection.
5. A directional drilling apparatus according to any one of claims 1 to 3, wherein the surface controller comprises a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120868456.5U CN215485870U (en) | 2021-04-25 | 2021-04-25 | Directional drilling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120868456.5U CN215485870U (en) | 2021-04-25 | 2021-04-25 | Directional drilling device |
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| Publication Number | Publication Date |
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| CN215485870U true CN215485870U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120868456.5U Active CN215485870U (en) | 2021-04-25 | 2021-04-25 | Directional drilling device |
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| CN (1) | CN215485870U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118422999A (en) * | 2024-05-28 | 2024-08-02 | 西南石油大学 | A mechanical hydraulic torque converter for horizontal wells |
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2021
- 2021-04-25 CN CN202120868456.5U patent/CN215485870U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118422999A (en) * | 2024-05-28 | 2024-08-02 | 西南石油大学 | A mechanical hydraulic torque converter for horizontal wells |
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