CN117780258A - Directional drilling guide structure suitable for automatic control - Google Patents
Directional drilling guide structure suitable for automatic control Download PDFInfo
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- CN117780258A CN117780258A CN202410199910.0A CN202410199910A CN117780258A CN 117780258 A CN117780258 A CN 117780258A CN 202410199910 A CN202410199910 A CN 202410199910A CN 117780258 A CN117780258 A CN 117780258A
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 230000005540 biological transmission Effects 0.000 claims abstract description 94
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000005641 tunneling Effects 0.000 description 8
- 230000008093 supporting effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The application discloses a directional drilling guiding structure suitable for automatic control, which relates to the technical field of drilling tools and comprises a transmission shaft, an outer shell, a retaining mechanism and a deflection mechanism, wherein a movable gap is reserved between the outer shell and the transmission shaft; the retaining mechanism is sleeved outside the transmission shaft and positioned in the movable gap, and can keep the transmission shaft to tunnel along a preset direction; the deflection mechanism comprises a deflection guide sleeve, a lower bearing assembly and a deflection driving assembly, and the deflection guide sleeve is eccentrically sleeved at one end, close to the drill bit, of the transmission shaft; the lower bearing assembly is sleeved on the transmission shaft and is positioned between the transmission shaft and the offset guide sleeve; the deflection drive assembly is configured to reciprocate the lower bearing assembly along the offset guide sleeve to deflect the drive shaft. The method is suitable for drilling of directional drilling and horizontal drilling, and can automatically control the deflection of the angle and the direction of the transmission shaft by receiving and uploading drilling instructions, parameters and the like, so as to realize the control of the well track.
Description
Technical Field
The application relates to the technical field of drilling tools, in particular to a directional drilling guiding structure suitable for automatic control.
Background
Along with the acceleration of the oil gas resource exploration and development process, the modern oil gas drilling technology also gets a long-term development, but the modern oil gas development faces more challenges, and the traditional oil gas resource is continuously developed and utilized, so that the oil gas resource under the conventional occurrence condition is gradually reduced, and the oil gas resource development is gradually changed into a novel oil gas resource. In the novel oil and gas resource exploration and development process, drilling engineering faces more complex stratum environments, so that the actual drilling working condition is more complex, and simultaneously, along with the change of the working condition, the drilling cost is further increased, and new requirements are put forward on drilling technical equipment. Especially in the process of drilling directional wells, horizontal wells and other structural wells, how to control the advancing direction of the well track becomes a technical problem which must be solved by drilling engineering.
In order to adapt to the development of modern oil and gas resources and also to adapt to the complex well structure of modern oil and gas wells, oil and gas drilling technical equipment is also continuously developed and perfected, wherein one of the typical products which are gradually developed and mature in the 21 st century is a rotary steering drilling tool. The rotary steering tool controls the deflection mechanism to act through the control system, so that steering drilling in the drilling process is realized, the borehole track is corrected in real time, and the drill bit can drill according to the designed borehole track. The rotary guiding tool can realize synchronous guiding and drilling, and other inclination correction tools are not required to be used for correcting the well track in a matched mode of tripping, so that tripping times can be effectively reduced, drilling efficiency is improved, and drilling cost is reduced. Therefore, the rotary guiding tool becomes key technical equipment of modern oil and gas drilling, and development of the rotary guiding tool has important research significance and wide market prospect, so that development of the modern drilling technical equipment can be promoted, and technical support can be provided for actual production of drilling.
Disclosure of Invention
The utility model provides a main aim at provides a directional drilling guide structure suitable for automatic control, aims at solving among the prior art to complicated stratum drilling, improves well track control precision, reduces the problem of drilling cost.
The technical scheme adopted by the application is as follows:
a directional drilling guide structure adapted for automatic control, comprising:
the lower end of the transmission shaft is connected with a drill bit;
the outer shell is sleeved outside the transmission shaft, and a movable gap is reserved between the outer shell and the transmission shaft;
the retaining mechanism is sleeved outside the transmission shaft and positioned in the movable gap, and can keep the transmission shaft to tunnel along a preset direction; the method comprises the steps of,
the deflection mechanism is sleeved outside the transmission shaft and is positioned between the retaining mechanism and the transmission shaft;
wherein the deflection mechanism comprises:
the offset guide sleeve is eccentrically sleeved at one end, close to the drill bit, of the transmission shaft;
the lower bearing assembly is arranged on the transmission shaft in a sleeved mode and is positioned between the transmission shaft and the offset guide sleeve; the method comprises the steps of,
a yaw drive assembly configured to apply a push-pull force to the lower bearing assembly to reciprocate the lower bearing assembly along the offset guide sleeve to deflect the drive shaft relative to the axis of the guide structure.
Optionally, the holding mechanism includes:
a first driving unit disposed on the outer case; the method comprises the steps of,
the direction sleeve is driven by the first driving unit to rotate, and an inner cavity channel for accommodating the transmission shaft and the deflection mechanism is axially arranged on the direction sleeve.
Optionally, the first driving unit is in transmission connection with the direction sleeve through a gear meshing mode.
Optionally, the deflection driving assembly includes:
the second driving unit is fixedly arranged on the outer shell;
an angle sleeve driven to rotate by the second driving unit; the method comprises the steps of,
the rotating sleeve is in transmission connection with the angle sleeve to rotate synchronously, the rotating sleeve is provided with an inner pushing piece, and the inner pushing piece applies pushing and pulling force to the lower bearing assembly along with positive and negative rotation of the rotating sleeve.
Optionally, the rotating sleeve is provided with a spiral groove along the inner wall, the inner pushing piece is a driving ball arranged in the spiral groove, and the driving ball is kept connected with the lower bearing assembly.
Optionally, the second driving unit is in transmission connection with the angle sleeve through a gear meshing mode.
Optionally, the angle sleeve is in transmission connection with the rotary sleeve through a gear meshing mode.
Optionally, one end of the transmission shaft away from the drill bit is rotatably connected with the outer casing through an upper bearing assembly.
Optionally, a centralizer is arranged on the peripheral wall of the outer shell.
Optionally, the outer housing is provided with a power supply unit and a control circuit.
Compared with the prior art, the beneficial effects of this application are:
according to the directional drilling guiding structure suitable for automatic control, the whole drilling direction of the transmission shaft is controlled through the retaining mechanism, the deflection mechanism is combined, the lower bearing assembly is driven to move along the eccentric offset guiding sleeve under the driving of the deflection driving assembly, so that the transmission shaft is driven to deflect at a certain angle relative to the whole axis of the guiding structure, the tunneling direction is easily adjusted, the drilling work of a complex stratum is easier to implement, the deflection angle of the transmission shaft is adjusted to be easier to control through adjusting the position of the lower bearing assembly in the eccentric guiding sleeve, and the guiding deflecting capability of a guiding tool is stronger.
Drawings
FIG. 1 is a schematic view of a directional drilling guiding structure suitable for automatic control according to an embodiment of the present application;
FIG. 2 is a schematic view of a directional drilling guide structure suitable for automatic control according to an embodiment of the present application;
fig. 3 is a cross-sectional view of a directional drilling guide structure suitable for automatic control according to an embodiment of the present application, taken from one perspective.
The reference numerals in the drawings indicate:
the device comprises a 1-transmission shaft, a 2-upper bearing, a 3-upper bearing seat, a 4-outer shell, a 5-directional sleeve driving motor, a 6-first gear pair, a 7-directional sleeve, an 8-centralizer, a 9-rotating sleeve, a 10-driving ball, an 11-offset guiding sleeve, a 12-guiding rod, a 13-drill bit, a 14-lower bearing seat, a 15-lower bearing, a 16-angle sleeve, a 17-second gear pair, a 18-angle sleeve driving motor, a 19-power supply unit and a 20-control circuit.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is correspondingly changed.
In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
Referring to fig. 1 to 3, an embodiment of the present application provides a directional drilling guiding structure suitable for automatic control, comprising a transmission shaft 1, an outer housing 4, a deflection mechanism and a holding mechanism, wherein:
the lower end of the transmission shaft 1 is connected with a drill bit 13, the specific structure of the drill bit 13 and the specific connection mode of the drill bit 13 and the transmission shaft 1 are the prior art, and are not described in detail here;
the outside of transmission shaft 1 is located to shell body 4 cover, utilize shell body 4 to form the protection to setting up in the inside component of shell body 4, shell body 4 simultaneously and with transmission shaft 1 between have the clearance of activity, so that transmission shaft 1 can deflect certain angle and can rotate relative to shell body 4 for shell body 4, concretely, both ends all extend to the outside of shell body 4 about the transmission shaft 1, shell body 4 is located the middle part of transmission shaft 1 promptly, and shell body 4's surface can contact with the wall of a well through centralizer 8, so that can be in relative stationary state between shell body 4 and the wall of a well.
Of course, in the above description, the centralizer 8 is circumferentially arranged on the outer casing 4, and the specific structure of the centralizer 8 and the specific connection manner between the centralizer 8 and the outer casing 4 are in the prior art, which is not described herein.
Referring to fig. 3, the retaining mechanism is sleeved outside the transmission shaft 1 and located in the movable gap, and the retaining mechanism can keep the transmission shaft 1 tunneling along the preset direction. Specifically, the holding mechanism includes a first driving unit and a direction sleeve 7, the first driving unit is disposed on the outer housing 4, the direction sleeve 7 is driven by the first driving unit to rotate, and an inner cavity channel for accommodating the transmission shaft 1 and the deflection mechanism is axially provided in the direction sleeve 7. Specifically, the first driving unit receives the command to output power to the direction sleeve 7, and the direction sleeve 7 is driven by the first driving unit to rotate along the axis of the transmission shaft 1 by a designated angle, so that tunneling is completed in a preset direction.
In the above, the first driving unit is the direction sleeve driving motor 5, for realizing the installation of the first driving unit, as shown in fig. 3, the outer wall of the outer casing 4 on one side of the upper end is provided with an installation cavity, the first driving unit is installed in the installation cavity, meanwhile, for realizing that the first driving unit drives the direction sleeve 7 to rotate, a transmission structure form of the first gear pair 6 is formed between the output end of the first driving unit and the direction sleeve 7 through gear engagement, so that power is transmitted to the direction sleeve 7 through the first gear pair 6 under the rotation of the first driving unit, and the direction sleeve 7 is driven to rotate around the transmission shaft 1 by a designated angle.
The deflection mechanism is sleeved outside the transmission shaft 1 and is positioned at the inner side of the holding mechanism, the deflection mechanism can drive the transmission shaft 1 to deflect relative to the outer shell 4, specifically, the deflection mechanism can apply force for deflecting the transmission shaft 1 to the transmission shaft 1 so as to deflect the transmission shaft 1 by taking the upper bearing 2 as a hinge fulcrum, and finally, the aim of changing the pointing angle of the drill bit 13 is achieved.
In this embodiment, as shown in fig. 3, the drive shaft 1 is provided near the upper end with an upper bearing assembly for effecting a rotational connection between the drive shaft 1 and the outer housing 4. Specifically, the upper bearing assembly includes an upper bearing seat 3 and an upper bearing 2, the upper bearing 2 is installed in the upper bearing seat 3, the upper bearing seat 3 is installed in the movable gap, the upper bearing 2 can adopt a spherical roller bearing, an angular contact ball bearing, a self-aligning roller bearing or other bearings, besides the function of supporting the transmission shaft 1, the deflection of the transmission shaft 1 at a certain angle can be realized, and the upper bearing seat 3 plays a role of supporting the upper bearing 2.
In the above, as shown in fig. 3, the upper end of the outer casing 4 is connected with the transmission shaft 1 through the upper bearing assembly, so that the transmission shaft 1 and the drill bit 13 rotate relative to the outer casing 4 by taking the upper bearing 2 as a center, in addition, the upper bearing assembly can also play a role in righting the transmission shaft 1, so that the transmission shaft 1 can smoothly rotate relative to the outer casing 4, a centralizer 8 is arranged at one end of the outer casing 4, which is close to the drill bit 13, a deflection mechanism can realize the angular deflection of the transmission shaft 1 in a region between the centralizer 8 and the drill bit 13, after the deflection mechanism applies force to the transmission shaft 1, the transmission shaft 1 can smoothly deflect, the transmission shaft 1, which is positioned on one side of the deflection mechanism, is close to the drill bit 13 deflects a certain angle relative to the outer casing 4, and changes the direction of the drill bit 13, so that the drill bit 13 deflects a certain angle towards the direction, thereby changing the tunneling direction.
In one embodiment of the present invention, as shown in fig. 3, the deflection mechanism includes a deflection guide sleeve 11, a lower bearing assembly and a deflection driving assembly, wherein the deflection guide sleeve 11 is eccentrically sleeved at one end of the transmission shaft 1 close to the drill bit 13; the lower bearing assembly is sleeved on the transmission shaft 1 and is positioned between the transmission shaft 1 and the offset guide sleeve 11, and the deflection driving assembly is configured to apply a push-pull force to the lower bearing assembly so that the lower bearing assembly reciprocates along the offset guide sleeve 11 to drive the transmission shaft 1 to deflect relative to the axis of the guide structure.
In the above description, the direction sleeve 7 is provided with a cavity channel along the axial direction, and the deflection driving assembly and the offset guide sleeve 11 are all disposed in the cavity channel. Specifically, the offset guide sleeve 11 is disposed at one end of the cavity channel, which is close to the drill bit 13, and the lower bearing assembly comprises a lower bearing seat 14 and a lower bearing 15, the lower bearing 15 is mounted in the lower bearing seat 14, the transmission shaft 1 passes through the lower bearing 15, and the lower bearing 15 and the transmission shaft 1 are in clearance fit, so that the supporting effect of the lower bearing 15 on the transmission shaft 1 can be ensured, and the lower bearing seat 14 can be ensured to move along the transmission shaft 1. The lower bearing seat 14 is installed in the offset guide sleeve 11 in a clearance manner, so that the lower bearing seat 14 can not only play a role in supporting the lower bearing 15, but also ensure that the lower bearing seat 14 moves in the offset guide sleeve 11. It is conceivable that the lower bearing assembly applies a force to the drive shaft 1 that deflects the drive shaft 1 as it moves along the eccentric guide sleeve, so as to deflect the drive shaft 1 and ultimately achieve the purpose of changing the direction in which the drill bit 13 is pointed.
Further, referring to fig. 3, the deflection driving assembly includes a second driving unit, an angle sleeve 16 and a rotating sleeve 9, the second driving unit is fixedly arranged on the outer casing 4, the angle sleeve 16 is driven by the second driving unit to rotate, the rotating sleeve 9 is connected with the angle sleeve 16 in a transmission way to synchronously rotate, the rotating sleeve 9 is provided with an inner pushing piece, the inner pushing piece applies push-pull force to the lower bearing assembly along the forward and backward reciprocating motion of the biasing guide sleeve 11 under the action of push-pull force, and when the lower bearing assembly moves in the biasing guide sleeve 11, the lower bearing assembly is under the action of eccentric force given by the biasing guide sleeve 11 due to the limitation of an eccentric cavity, so that the lower bearing assembly can transmit the eccentric force to the transmission shaft 1, and the transmission shaft 1 applies deflection force to the transmission shaft 1 so as to deflect the transmission shaft 1, and finally, the purpose of changing the direction of the drill bit 13 is achieved.
In the above, in order to apply a push-pull force to the lower bearing assembly through the rotation of the rotating sleeve 9, as shown in fig. 3, the rotating sleeve 9 is provided with a spiral groove along the inner wall, the inner pushing member is a driving ball 10 disposed in the spiral groove, and a friction force is provided between the driving ball 10 and the spiral groove, so that the friction force of the rotating sleeve 9 to the driving ball 10 in the rotating process is decomposed into a tangential force and an axial force with the spiral groove as a circumference, the tangential force forces the driving ball 10 to move along the spiral groove, the lower bearing assembly is located at the inner ring of the rotating sleeve 9, and the driving ball 10 is always connected with the lower bearing assembly, so that the driving ball 10 moves forward and backward along the spiral groove under the forward and backward rotation of the rotating sleeve 9, thereby pushing the lower bearing assembly to move forward and backward in the offset guide sleeve 11, and the lower bearing assembly is deflected by the guide effect of the offset guide sleeve 11, so as to realize the angular deflection adjustment of the transmission shaft 1. Also, a guide rod 12 is provided in the offset guide sleeve 11 for guiding the movement of the lower bearing assembly.
In one embodiment, referring to fig. 3, the second driving unit is an angle sleeve driving motor 18, and in order to fix the second driving unit, a mounting cavity is formed on the outer wall of one side of the outer casing 4 opposite to the first driving unit, for mounting the second driving unit, a gear mesh is formed between the second driving unit and the angle sleeve 16 through a second gear pair 17, the angle sleeve 16 is driven to rotate by the second driving unit, and in order to transmit rotation to the rotating sleeve 9, in this embodiment, an end face tooth is arranged at one end, close to each other, of the angle sleeve 16 and the rotating sleeve 9, and the two rotate synchronously through the end face tooth mesh.
As shown in fig. 3, the first driving unit and the direction sleeve 7 are meshed through the first gear pair 6 to drive, the first driving unit transmits power to the direction sleeve 7, the direction sleeve 7 is driven to rotate around the transmission shaft 1 in a designated direction, so that the guiding structure is driven to tunnel in the designated direction, meanwhile, the second driving unit is combined with the second driving unit to mesh the angle sleeve 16 through the second gear pair 17, the power is transmitted to the angle sleeve 16, the angle sleeve 16 meshes with the rotating sleeve 9 through the end face teeth, so that the rotating sleeve 9 synchronously rotates along with the angle sleeve 16, the friction force of the spiral groove on the driving ball 10 in the rotating process is decomposed into tangential force and axial force taking the spiral groove as a circumference, the tangential force forces the driving ball 10 to move along the spiral groove, the bearing seat is positioned on the inner ring of the rotating sleeve 9, and the driving ball 10 is always connected with the lower bearing assembly, so that the driving ball 10 moves forwards and backwards along the spiral groove under the forward and backward rotation of the rotating sleeve 9, the lower bearing assembly is driven to move forwards and backwards in the biasing guide sleeve 11, and the guiding function of the biasing guide sleeve 11 is utilized to enable the deflection of the lower bearing assembly to deflect the transmission shaft 1 to realize the angle adjustment of the deflection angle of the bearing assembly.
In addition, it can be understood that the larger the magnitude of the bias resultant force vector applied to the transmission shaft 1 by the driving deflection mechanism, the larger the deflection amount of the transmission shaft 1 assembly relative to the outer casing 4, the larger the angle that the transmission shaft 1 drives the drill bit 13 to rotate relative to the outer casing 4 by taking the spherical bearing structure as the center, meanwhile, the larger the lateral cutting force of the drill bit 13 to the guiding direction is, the stronger the deflecting capability is, and the magnitude of the bias resultant force can be controlled by adjusting the position of the lower bearing assembly in the bias guiding sleeve 11, so that the drill bit 13 is driven to rotate at a certain angle by taking the upper bearing 2 as the center, and the drill bit 13 can cut in the guiding direction by taking the larger lateral cutting force, thereby achieving the purpose of guiding drilling.
The second driving motor drives the angle sleeve 16 to rotate, the angle sleeve 16 drives the rotary sleeve 9 to rotate, the driving ball 10 is used for adjusting the position of the lower bearing 15 in the offset guide sleeve 11, the eccentric force received by the lower bearing 15 in the offset guide sleeve 11 is transmitted to the transmission shaft 1, the force is applied to the transmission shaft 1 to finish the deflection of the transmission shaft 1, the magnitude of the eccentric force at different positions is different, and the side cutting deflection degree of the drill bit 13 is different.
Further, the embodiment of the application provides a directional drilling guiding structure suitable for automatic control, which further comprises a downhole measurement while drilling system (i.e. MWD), a downhole geological measurement system (i.e. LWD) and the like, and is used for completing detection in a downhole tunneling process, and correcting a tunneling direction and tunneling data (such as rotating speed, bit pressure and the like) through measurement results. In order to respond to data in time, as shown in fig. 2, a control circuit 20 is further arranged on the side wall of the outer casing 4 of the guiding structure, the control circuit 20 is used for receiving and uploading related drilling instructions, parameters and the like, the drilling system sends control instructions of the guiding direction to the control circuit 20, and the control circuit 20 can drive each motor (namely the first driving unit and the second driving unit) to act according to the received control instructions so as to control the arranged holding mechanism and the deflection mechanism to act, and the purpose of tunneling according to the guiding direction is achieved through mutual coordination.
In the above, referring to fig. 1, the outer housing 4 is further provided with a power supply unit 19, and the power supply unit 19 supplies power to the guide structure through a power supply circuit. Specifically, the power supply unit 19 includes a battery box provided on the outer casing 4 and a plurality of batteries installed in the battery box, and the batteries are used for providing power to the control circuit 20, the first driving unit and the second driving unit, so as to ensure power supply of the device. Thus, when the rotary steering drilling is required to be realized, the battery supplies power, and under the operation of the first driving motor and the second driving motor, the 360-degree azimuth controlled by the direction sleeve 7 is combined with the inclination angle controlled by the angle sleeve 16, so that a complete three-dimensional coordinate system is established, and the steering tool is guided to advance towards a target.
From the foregoing, it can be seen that the embodiment of the present application provides a directional drilling guiding structure suitable for automatic control, and the use process thereof:
the drilling system gives an instruction to the control circuit 20, the control circuit 20 controls each driving motor to act, the actuating mechanism connected with each driving motor acts, at the moment, the first driving unit and the direction sleeve 7 are meshed through the first gear pair 6 to drive, the first driving unit transmits power to the direction sleeve 7, the direction sleeve 7 is driven to rotate around the transmission shaft 1 by a designated angle, the guiding structure is driven to tunnel according to the designated direction, meanwhile, the second driving unit is combined to engage the angle sleeve 16 through the second gear pair 17, the power is transmitted to the angle sleeve 16 through the second driving unit, the angle sleeve 16 is meshed with the rotating sleeve 9 through the end face teeth, the rotating sleeve 9 synchronously rotates along with the angle sleeve 16, the friction force of the spiral groove on the driving ball 10 is decomposed into tangential force and axial force taking the spiral groove as the circumference, the tangential force forces the driving ball 10 to move along the spiral groove, the lower bearing assembly is positioned on the inner ring of the rotating sleeve 9, the driving ball 10 is always connected with the lower bearing seat assembly, and the driving ball 10 is driven to move forward and backward along the spiral groove under the rotating driving of the rotating sleeve 9, the rotating shaft of the rotating sleeve, the driving ball 10 moves forward and backward along the spiral groove, the guiding assembly is biased to the guiding sleeve 11 is biased to the guiding shaft 1, and the forward and the angle of the guiding assembly is deflected to the transmission shaft 1 is offset, and the angle is adjusted, the forward and the angle of the transmission shaft 1 is realized.
In summary, the rotary steering drilling tool of the invention is suitable for drilling of directional drilling and horizontal drilling, and can automatically control the deflection of the angle and the direction of the transmission shaft by receiving and uploading drilling instructions, parameters and the like, thereby realizing the control of the well track.
The foregoing description of the preferred embodiments of the present application is not intended to limit the invention to the particular embodiments of the present application, but to limit the scope of the invention to the particular embodiments of the present application.
Claims (10)
1. A directional drilling guide structure adapted for automatic control, comprising:
the lower end of the transmission shaft is connected with a drill bit;
the outer shell is sleeved outside the transmission shaft, and a movable gap is reserved between the outer shell and the transmission shaft;
the retaining mechanism is sleeved outside the transmission shaft and positioned in the movable gap, and can keep the transmission shaft to tunnel along a preset direction; the method comprises the steps of,
the deflection mechanism is sleeved outside the transmission shaft and is positioned between the retaining mechanism and the transmission shaft;
wherein the deflection mechanism comprises:
the offset guide sleeve is eccentrically sleeved at one end, close to the drill bit, of the transmission shaft;
the lower bearing assembly is arranged on the transmission shaft in a sleeved mode and is positioned between the transmission shaft and the offset guide sleeve; the method comprises the steps of,
a yaw drive assembly configured to apply a push-pull force to the lower bearing assembly to reciprocate the lower bearing assembly along the offset guide sleeve to deflect the drive shaft relative to the axis of the guide structure.
2. A directional drilling guide structure adapted for automatic control according to claim 1, wherein the holding mechanism comprises:
a first driving unit disposed on the outer case; the method comprises the steps of,
the direction sleeve is driven by the first driving unit to rotate, and an inner cavity channel for accommodating the transmission shaft and the deflection mechanism is axially arranged on the direction sleeve.
3. A directional drilling guide structure adapted for automatic control according to claim 2, wherein the first drive unit is drivingly connected to the directional casing by means of a gear engagement.
4. A directional drilling guide structure adapted for automatic control as defined in claim 1, wherein said yaw drive assembly comprises:
the second driving unit is fixedly arranged on the outer shell;
an angle sleeve driven to rotate by the second driving unit; the method comprises the steps of,
the rotating sleeve is in transmission connection with the angle sleeve to rotate synchronously, the rotating sleeve is provided with an inner pushing piece, and the inner pushing piece applies pushing and pulling force to the lower bearing assembly along with positive and negative rotation of the rotating sleeve.
5. A directional drilling guide structure adapted for use in automatic control according to claim 4, wherein the swivel housing is provided with a helical groove along an inner wall, and the inner pusher is a drive ball disposed within the helical groove, the drive ball being held in connection with the lower bearing assembly.
6. A directional drilling guide adapted for automatic control according to claim 4, wherein the second drive unit is drivingly connected to the angle sleeve by means of a gear engagement.
7. A directional drilling guide adapted for use in automatic control as claimed in claim 4, wherein the angle sleeve is drivingly connected to the rotary sleeve by way of a gear engagement.
8. A directional drilling guide adapted for use in automatic control according to claim 1, wherein the end of the drive shaft remote from the drill bit is rotatably connected to the outer housing by an upper bearing assembly.
9. A directional drilling guide structure adapted for automatic control according to claim 1, characterized in that the outer peripheral wall of the outer housing is provided with a centralizer.
10. A directional drilling guide structure adapted for automatic control according to claim 1, characterized in that the outer housing is provided with a power supply unit and a control circuit.
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| CN202410199910.0A CN117780258A (en) | 2024-02-23 | 2024-02-23 | Directional drilling guide structure suitable for automatic control |
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| CN202410199910.0A CN117780258A (en) | 2024-02-23 | 2024-02-23 | Directional drilling guide structure suitable for automatic control |
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| CN114144567A (en) * | 2019-04-08 | 2022-03-04 | 动力上游技术公司 | Steering assembly for directional drilling of a wellbore |
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2024
- 2024-02-23 CN CN202410199910.0A patent/CN117780258A/en active Pending
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| US20140231136A1 (en) * | 2011-03-30 | 2014-08-21 | Halliburton Energy Services, Inc. | Apparatus and method for rotary steering |
| CN104838083A (en) * | 2012-12-19 | 2015-08-12 | 哈里伯顿能源服务公司 | Directional drilling using a rotating housing and a selectively offsetable drive shaft |
| CN108331543A (en) * | 2017-12-27 | 2018-07-27 | 中国石油集团长城钻探工程有限公司 | A kind of rotary steering drilling tool |
| CN114144567A (en) * | 2019-04-08 | 2022-03-04 | 动力上游技术公司 | Steering assembly for directional drilling of a wellbore |
| CN112253008A (en) * | 2020-11-18 | 2021-01-22 | 成都希能能源科技有限公司 | Centralizer with well hole trimming function |
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