Intelligent guiding rotary short section for well drilling, control method of intelligent guiding rotary short section and well drilling tool

Abstract

The invention relates to the field of terrestrial heat and petroleum and natural gas drilling, in particular to an intelligent guiding rotary short section for well drilling, a control method of the intelligent guiding rotary short section and a well drilling tool. The sliding pin and the sliding groove are respectively connected with the nipple body, the sliding pin can move between a first position and a second position, and the sliding groove is further connected with a second drilling tool; at the first position, the sliding pin and the sliding groove are separated, the sliding pin and the short section body rotate along with the first drilling tool, and the sliding groove rotates along with the second drilling tool; and at the second position, the sliding pin is jointed with the sliding groove, and the sliding pin drives the sliding groove, the second drilling tool and the short section body to rotate along with the first drilling tool. The intelligent guiding rotary short section for well drilling can be connected to the upper portion of a single-bent screw, a drilling tool above the short section can rotate at a low speed, combined use of drilling tools below the short section is not affected, sliding well sections of the drilling tool are greatly reduced, drilling tool dragging pressure caused by sliding drilling is greatly weakened, and well drilling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of geothermal, oil and gas drilling, and in particular to an intelligent steering rotary sub for drilling and a control method thereof. The present invention also relates to a drilling tool comprising the intelligent steering rotary sub for drilling. Background Art

[0002] With the exploration and development of oil and gas fields, the demand for drilling large well deviations and large displacement wells has gradually increased due to the limitations of ground conditions. During the drilling process, drag and pressure are common problems. At present, the more mature technology for this is rotary directional drilling, but its cost is relatively high. Conventional directional drilling is a single-bend screw sliding drilling. At this time, only the drill bit rotates, and the rest lies on the well wall, which greatly increases the friction resistance. In wells with small well deviation and small displacement, single-bend screw sliding drilling can meet the drilling construction, but in wells with large well deviation and large displacement, single-bend screw sliding drilling has low drilling efficiency due to the drag and pressure of the drill bit.

[0003] Based on this, there is still room for improvement in the existing technology. Summary of the invention

[0004] This application summarizes various aspects of the embodiments and should not be used to limit the claims. Other embodiments are conceivable based on the technology described herein, which will be apparent to those skilled in the art after studying the following drawings and detailed descriptions, and these embodiments are intended to be included within the scope of this application.

[0005] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide an intelligent directional rotating short section for drilling, which is connected to the upper part of a single-bend screw. During directional drilling, the drill bit above the short section can rotate slowly without affecting the combined use of the drill bit below the short section. It can greatly reduce the sliding section of the drill bit, greatly reduce the drag pressure of the drill bit caused by sliding drilling, and improve the drilling efficiency.

[0006] Specifically, according to one aspect of the present invention, the present invention provides an intelligent directional rotating short section for drilling, which includes: a short section body, the short section body is connected to a first drilling tool; a sliding pin and a sliding groove respectively connected to the short section body, wherein the sliding pin can move between a first position and a second position, and the sliding groove is further connected to a second drilling tool; wherein, in the first position, the sliding pin and the sliding groove are separated, the sliding pin rotates with the first drilling tool together with the short section body, and the sliding groove rotates with the second drilling tool; in the second position, the sliding pin and the sliding groove are engaged, and the sliding pin drives the sliding groove and the second drilling tool to rotate with the short section body together with the first drilling tool.

[0007] In an embodiment of the present invention, the sliding pin includes a sliding pin body and a sliding pin extension extending from the sliding pin body, and the sliding groove includes a sliding groove body and a key groove arranged in the sliding groove body, and when the sliding pin is in the second position, the key groove receives at least a portion of the sliding pin extension.

[0008] In an embodiment of the present invention, the sliding pin is connected to the short section body through a driving component, the driving component includes a motor and a screw connected to the motor, and the sliding pin further includes a screw hole arranged on the sliding pin body, the screw hole is used to receive the screw, and the sliding pin moves between the first position and the second position through the screw under the action of the motor.

[0009] In an embodiment of the present invention, the intelligent steerable rotary short section for drilling further includes a pin key arranged on the short section body and located between the sliding pin and the sliding groove. When the sliding pin is in the second position, the first drilling tool transmits torque to the second drilling tool through the pin key.

[0010] In an embodiment of the present invention, the pin key is located between two of the sliding pin extensions.

[0011] In an embodiment of the present invention, the sliding pin sleeve is arranged on the upper part of the short section body, the sliding groove sleeve is arranged on the lower part of the short section body, and the lower part includes a first shoulder arranged thereon, and the sliding groove includes a second shoulder arranged on the sliding groove body and cooperating with the first shoulder to prevent the second drilling tool from slipping.

[0012] In an embodiment of the present invention, the intelligent steering rotary sub for drilling further comprises a magnetic sheet and a voltage monitoring sheet arranged on the sub body, and the magnetic sheet and the voltage monitoring sheet are located above the sliding pin.

[0013] In an embodiment of the present invention, the rotating short section is cylindrical, and a plurality of the magnetic sheets and a plurality of the voltage monitoring sheets are arranged at intervals along the circumference of the cylinder, and the connection lines between the two magnetic sheets intersect with the connection lines between the two voltage monitoring sheets.

[0014] In an embodiment of the present invention, the two magnetic sheets and the two voltage monitoring sheets are arranged at intervals along the circumference of the cylinder, and the line connecting the two magnetic sheets is perpendicular to the line connecting the two voltage monitoring sheets.

[0015] In an embodiment of the present invention, the intelligent steerable rotary sub for drilling further comprises a sleeve connected to the sub body and the slide groove.

[0016] In an embodiment of the present invention, the intelligent steerable rotary sub for drilling further comprises a first sealing ring arranged between the sub body and the slide groove and a second sealing ring arranged between the slide groove and the casing.

[0017] According to another aspect of the present invention, a control method for an intelligent steerable rotary short section for drilling is provided, which comprises the following steps: judging whether directional drilling or combined drilling is required based on the measured voltage; in response to the need for directional drilling, placing the sliding pin in a first position; and in response to the need for combined drilling, placing the sliding pin in a second position.

[0018] In an embodiment of the present invention, the step of locating the sliding pin in the first position in response to the need for directional drilling includes: in response to the need for directional drilling, controlling the motor to rotate in a first direction to separate the sliding pin from the sliding slot, the sliding pin and the short section body rotate together with the first drilling tool connected to the short section body, and the sliding slot rotates with the second drilling tool connected to the sliding slot; and the step of locating the sliding pin in the second position in response to the need for composite drilling includes: in response to the need for composite drilling, controlling the motor to rotate in a second direction opposite to the first direction to engage the sliding pin and the sliding slot, the sliding pin drives the sliding slot and the second drilling tool to rotate together with the short section body along with the first drilling tool.

[0019] According to yet another aspect of the present invention, a drilling tool is provided, which comprises the aforementioned intelligent steerable rotary sub for drilling.

[0020] The intelligent directional rotary short section for drilling described in the present invention can be connected to the upper part of the single-bend screw, and the drill tool above the short section can rotate slowly without affecting the combined use of the drill tool below the short section, greatly reducing the sliding section of the drill tool, greatly reducing the drag and pressure of the drill tool caused by sliding drilling, and improving the drilling efficiency. It is particularly suitable for situations where the sliding directional drag and pressure are serious in large displacement and large inclination wells, and can reduce the drag and pressure of the drill tool caused by sliding drilling, thereby improving the drilling efficiency.

[0021] Those skilled in the art will understand and appreciate these and other aspects, objects and features of the present disclosure after studying the following specification, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] For a more complete understanding of the embodiments of the present application, reference should be made to the embodiments illustrated in more detail in the accompanying drawings and described by way of example below, in which:

[0023] Figure 1a A schematic diagram of the structure of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0024] Figure 1b Shows Figure 1aA cross-sectional view of an intelligent steerable rotary sub for drilling is shown;

[0025] Figure 1c Shows Figure 1a A perspective view of an intelligent steering rotary sub for drilling, wherein the sheath is removed for clarity, and the sliding pin of the intelligent steering rotary sub for drilling is in a first position;

[0026] Figure 1d Shows Figure 1a A perspective view of a smart steering rotary sub for drilling, wherein the sheath is removed for clarity, and the sliding pin of the smart steering rotary sub for drilling is in the second position;

[0027] Figure 2a A schematic structural diagram of a sub body of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0028] Figure 2b Shows Figure 2a A cross-sectional view of the nipple body is shown;

[0029] Figure 3a A schematic diagram showing the structure of a slideway of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0030] Figure 3b Shows Figure 3a A cross-sectional view of the chute shown;

[0031] Figure 3c Shows Figure 3a A top view of the chute shown;

[0032] Figure 4 A schematic diagram showing the structure of a pin key of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0033] Figure 5 A schematic structural diagram of a sliding pin of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0034] Figure 6 A schematic diagram showing the structure of a driving component of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention;

[0035] Figure 7a A schematic diagram showing the structure of a casing of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0036] Figure 7b Shows Figure 7a a cross-sectional view of the sheath shown;

[0037] Figure 8aA schematic diagram showing the structure of a magnetic sheet of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0038] Figure 8b A schematic diagram showing the structure of a voltage monitoring piece of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0039] Fig. 9 A schematic diagram showing the structure of a sealing ring of an intelligent steering rotary sub for drilling provided by an embodiment of the present invention is shown;

[0040] Fig.10 A flow chart of a control method for an intelligent steerable rotary sub for drilling provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0041] Embodiments of the present disclosure are described below. However, it should be understood that the disclosed embodiments are merely examples, and other embodiments may take various alternative forms. The drawings are not necessarily drawn to scale; certain features may be exaggerated or minimized to show the details of a particular component. Therefore, the specific structural and functional details disclosed herein should not be interpreted as limiting, but merely as a representative basis for teaching those skilled in the art to use the present application in various ways. As will be understood by those skilled in the art, the various features shown and described with reference to any one of the figures may be combined with the features shown in one or more other figures to produce embodiments that are not explicitly shown or described. The combination of features shown provides representative embodiments for typical applications. However, various combinations and modifications of features consistent with the teachings of the present disclosure may be desirable for certain specific applications or embodiments.

[0042] Furthermore, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or action from another entity or action, and do not necessarily require or imply any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but may also include elements not expressly listed or inherent to such process, method, article, or apparatus.

[0043] According to one aspect of the present invention, there is provided an intelligent steering rotary sub 100 for drilling, such as Figure 1a to Figure 1d As shown, it comprises: a short section body 1, the short section body 1 is connected to a first drilling tool (not shown in the figure); a sliding pin 4 and a sliding groove 2 respectively connected to the short section body 1, wherein the sliding pin 4 can be Figure 1c The first position shown and Figure 1d The second position shown in the figure moves between the two positions, and the slide 2 is further connected to the second drilling tool (not shown in the figure); wherein, Figure 1cIn the first position shown, the slide pin 4 and the slide slot 2 are separated, the slide pin 4 can rotate with the first drilling tool together with the short section body 1, and the slide slot 2 rotates with the second drilling tool; Figure 1d In the second position shown, the sliding pin 4 is engaged with the sliding groove 2, and the sliding pin 4 can drive the sliding groove 2 and the second drilling tool to rotate with the first drilling tool together with the short section body 1. Under the conception of the present invention, when directional drilling is required, the sliding pin 4 can be located in the first position, at which time the sliding pin 4 is separated from the sliding groove 2, and the rotation of the first drilling tool does not affect the rotation of the second drilling tool. For example, the first drilling tool can be rotated slowly without affecting the rotation of the second drilling tool, which can greatly reduce the sliding section of the drilling tool, greatly reduce the drag and pressure of the drilling tool caused by sliding drilling, and improve the drilling efficiency of the short section. When composite drilling is required, the sliding pin 4 moves to the second position and engages with the sliding groove 2, so that the second drilling tool can rotate synchronously with the first drilling tool. In an embodiment of the present invention, the first drilling tool can be an upper drilling tool (such as a D127mm drill pipe or a D165mm drill collar) connected to the upper part of the intelligent directional rotary short section 100 for drilling, and the second drilling tool can be a lower drilling tool (such as a lower drilling tool connected by a single bent screw) connected to the lower part of the intelligent directional rotary short section 100 for drilling. It should be understood that the second position described in the present invention includes the situation where at least part of the slide pin 4 is engaged with the slide slot 2. That is, although Figure 1d FIG. 4 shows that a portion of a slide pin extension (described in detail below) of the slide pin 4 is engaged with the slide slot 2, but situations where only a small portion of the slide pin extension or the entire slide pin extension is engaged with the slide slot 2 are all within the scope of the present invention.

[0044] In the embodiments of the present invention, further reference is made to Figure 2a and 2bThe short section body 1 is cylindrical and has a hollow structure with a certain wall thickness. From top to bottom, it is provided with a first drilling tool connection thread (not shown in the figure), a sleeve fixing pin hole 1-1, a magnetic sheet and a voltage monitoring sheet installation groove 1-2, a drive component fixing pin hole 1-3, a pin key installation groove 1-4, a first sealing ring groove 1-5, and a first shoulder 1-6. The short section body 1 can be connected to the first drilling tool through the first drilling tool connection thread. The sleeve fixing pin hole 1-1, the magnetic sheet and the voltage monitoring sheet installation groove 1-2, the drive component fixing pin hole 1-3, and the pin key installation groove 1-4 are respectively used to install the sleeve 6, the magnetic sheet 7-1 and the pressure monitoring sheet 7-2 (the two are collectively referred to as the monitoring sheet 7), the drive component, and the pin key 3 described below. The first sealing ring groove 1-5 is used to receive the first sealing ring (not shown in the figure) that is sealed and connected to the slide 2. The first shoulder 1-6 is also called an anti-slip shoulder, which is used to cooperate with the second shoulder 2-3 in the slide 2. In one embodiment, the number of the pin key installation slots 1-4, the magnetic sheet and voltage monitoring sheet installation slots 1-2, and the magnetic sheet and voltage monitoring sheet installation slots 1-2 are all 4, and are evenly distributed along the circumference of the short section body 1. In other embodiments, different numbers of pin key installation slots 1-4, magnetic sheet and voltage monitoring sheet installation slots 1-2, and magnetic sheet and voltage monitoring sheet installation slots 1-2 can be set as needed.

[0045] In the embodiments of the present invention, further reference is made to Figure 3a to Figure 3c The chute 2 is a hollow cylindrical shape, and its inner diameter is slightly larger than the outer diameter of the short section body 1, so that it can be sleeved on the short section body 1. The upper outer side of the chute 2 is machined with a second sealing ring groove 2-1, and the second sealing ring groove 2-1 is used to receive a second sealing ring (not shown in the figure) that forms a sealing connection with the sleeve 6. The upper inner side of the chute 2 is machined with a key groove 2-2, and the key groove 2-2 can cooperate with the sliding pin 4. When at least a part of the sliding pin 4 is inserted into the key groove 2-2 (that is, the sliding pin 4 is in the second position), the first drilling tool drives the second drilling tool to rotate; when the sliding pin 4 is out of the key groove 2-2 (that is, the sliding pin 4 is in the first position), the rotation of the first drilling tool does not affect the second drilling tool. The bottom of the chute 2 is machined with a second shoulder 2-3, which can cooperate with the first shoulder 1-6 to prevent the second drilling tool from slipping.

[0046] In an embodiment of the present invention, the intelligent steering rotary sub 100 for drilling further comprises a pin key 3 disposed on the sub body 1 and located between the sliding pin 4 and the sliding groove 2. Figure 4 The pin key 3 is in the shape of a long pancake, and two pin holes are symmetrically formed in the pancake, namely, the first pin hole 3-1 and the second pin hole 3-2. The pin key 3 is installed in the pin key installation groove 1-4, and cooperates with the sliding pin 4 and the sliding groove 2 to control the rotation of the second drilling tool. Figure 1c and 1dAs shown, the pin key 3 is located between two adjacent slide pin extensions 4-1. When the slide pin extension 4-1 of the slide pin 4 is at least partially inserted into the slide slot 2, the first drilling tool transmits the torque through the pin key 3, that is, transmits it to the second drilling tool.

[0047] In the embodiments of the present invention, further reference is made to Figure 5 The sliding pin 4 is generally hollow cylindrical and includes a sliding pin body 4-2, which is a circular ring structure. The sliding pin 4 also includes a sliding pin extension 4-1 extending from the sliding pin body 4-2, and at least a portion of the sliding pin extension 4-1 can slide into the keyway 2-2 of the slide groove 2 as described above and can slide out therefrom. Figure 5 In the embodiment shown, four slide pin extensions 4-1 extend downward from the bottom of the slide pin body 4-2, and the four slide pin extensions 4-1 are evenly arranged along the circumference of the slide pin body 4-2. In other embodiments, other numbers of slide pin extensions may also be provided. During compound drilling, at least a portion of each slide pin extension 4-1 can be inserted into the respective key slots 2-2 of the slide slot 2, so that the first and second drilling tools are linked. At least one screw hole 4-3 is evenly machined circumferentially on the top surface of the slide pin body 4-2, and a thread is machined in the screw hole 4-3. The screw hole 4-3 can cooperate with the screw 5-1 described below, and when the screw 5-1 rotates, the slide pin 4 can move up and down.

[0048] In the embodiments of the present invention, further reference is made to Figure 6 , Figure 6 A driving component is shown, through which the sliding pin 4 is connected to the short section body 1. The driving component includes a motor 5-2 and a screw 5-1 connected to the motor 5-2, and the screw 5-1 is the rotating shaft of the motor 5-2. Under the action of the motor 5-2, the screw 5-1 can rotate clockwise or counterclockwise, and the rotation of the screw 5-1 drives the sliding pin 4 to move between the first position and the second position. In one embodiment, the motor 5-2 is a stepping motor.

[0049] The driving component also includes a controller (also called a detection controller) 5 - 3 , which has a built-in battery and a chip circuit and is the intelligent core of the entire short section 100 .

[0050] In an embodiment of the present invention, the intelligent steering rotary sub 100 for drilling further comprises a sheath 6 connected to the sub body 1 and the chute 2. Figure 7a and Figure 7bThe sheath (also called controller sheath) 6 is cylindrical, with a diameter larger than the slide slot 2, and is used to protect the driving components, the slide pin 4, etc., so that they do not act on the well wall. In order to achieve fixation, the sheath 6 is provided with mounting holes 6-1 corresponding to the magnetic sheet and the pressure monitoring sheet mounting slot 1-2, and mounting holes 6-2 and 6-3 corresponding to the two holes in the pin key mounting slot 1-4, which are used to fix the sheath 6 itself and the pin key 3 on the short section body 1 accordingly.

[0051] In an embodiment of the present invention, the intelligent steering rotary sub 100 for drilling further comprises a magnetic sheet 7-2 and a voltage monitoring sheet 7-1 arranged on the sub body 1, and the magnetic sheet 7-2 and the voltage monitoring sheet 7-1 are located above the sliding pin 4. Figure 8a and Figure 8b , the voltage monitoring sheet 7-2 and the magnetic sheet (also called detection magnetic sheet) 7-1 are both arc-shaped sheets, the magnetic sheet 7-1 is used to generate a magnetic field, and the voltage monitoring sheet 7-2 is used to monitor the voltage. In one embodiment, the set flow rate can be monitored, and the measured voltage is different for different flow rates. The present invention can produce different actions according to the measured voltage, such as executing forward or reverse rotation of the motor. The magnetic sheet 7-1 and the voltage monitoring sheet 7-2 are located above the sliding pin 4. A plurality of magnetic sheets 7-1 and a plurality of voltage monitoring sheets 7-2 are arranged at intervals along the circumference of the short section body 1, and the connection line of the two magnetic sheets intersects with the connection line of the two voltage monitoring sheets. In one embodiment, two magnetic sheets 7-1 and two voltage monitoring sheets 7-2 are arranged at intervals along the circumference of the short section body 1, and the connection line of the two magnetic sheets 7-1 is perpendicular to the connection line of the two voltage monitoring sheets 7-2.

[0052] In an embodiment of the present invention, the intelligent steering rotary sub 100 for drilling further includes a sealing ring 8. Fig. 9 , a sealing ring 8 is shown, which is annular and seals the gap between the chute 2 and the short section body 1 and the jacket 6. In one embodiment, the sealing ring 8 may include a first sealing ring and a second sealing ring, wherein the first sealing ring is arranged between the short section body 1 and the chute 2, and the second sealing ring is arranged between the chute 2 and the jacket 6.

[0053] In an embodiment of the present invention, Figure 1a and 1b The installation steps of the intelligent steering rotary sub 100 for drilling are as follows:

[0054] 1. Put the first sealing ring and the second sealing ring on the short section body 1 and the slide groove 2 respectively;

[0055] 2. Put the slide 2 on the short section body 1;

[0056] 3. The pin key 3 is installed in the pin key installation groove 1-4 through a pin;

[0057] 4. The sliding pin 4 is sleeved on the short section body 1;

[0058] 5. Turn the screw 5-1 into the screw hole 4-3, and fix the controller 5-3 and the motor 5-2 to the short section body 1 through pins;

[0059] 6. Put the sheath 6 on the short section body 1 and fix it with pins;

[0060] 7. Install the magnetic sheet 7-1 and the voltage monitoring sheet 7-2 in the magnetic sheet and pressure monitoring sheet installation slot 1-2, fix them with pins, and connect the power supply circuit;

[0061] 8. Write the program into the microcontroller.

[0062] According to another aspect of the present invention, a control method for the intelligent steering rotary sub 100 for drilling as described above is provided. Fig.10 As shown, the method comprises the following steps:

[0063] S1. Determine whether directional drilling or composite drilling is required based on the measured voltage;

[0064] S2. In response to the need for directional drilling, the slide pin is located in a first position; and

[0065] S3. In response to the need for compound drilling, the slide pin is located in the second position.

[0066] In an embodiment of the present invention, step S2 includes: in response to the need for directional drilling, by controlling the motor to rotate in a first direction, the sliding pin is separated from the sliding groove, the sliding pin and the short section body rotate together with the first drilling tool connected to the short section body, and the sliding groove rotates with the second drilling tool connected to the sliding groove; and step S3 includes: in response to the need for composite drilling, by controlling the motor to rotate in a second direction opposite to the first direction, the sliding pin and the sliding groove are engaged, and the sliding pin drives the sliding groove and the second drilling tool to rotate together with the short section body with the first drilling tool.

[0067] In one embodiment, forward rotation of the motor disengages the slide pin from the slide slot, and reverse rotation of the motor engages the slide pin and the slide slot.

[0068] According to another aspect of the present invention, a drilling tool is provided, which includes the aforementioned intelligent steerable rotary sub 100 for drilling.

[0069] The present invention is described below by specific examples:

[0070] refer to Figure 1a to Figure 9The intelligent directional rotary sub 100 for drilling may include: a sub body 1, a slide groove 2, a pin key 3, a slide pin 4, a controller 5-3, a motor 5-2, a sheath 6, a magnetic sheet 7-1, a voltage monitoring sheet 7-2 and a sealing ring 8. The various components of the intelligent directional rotary sub 100 for drilling are connected together by threads or pins. The sub 100 is connected to the upper part of the single-bend screw. During directional drilling, the drill tool above the sub can rotate slowly without affecting the combined use of the drill tool below the sub, greatly reducing the sliding section of the drill tool, greatly reducing the drag pressure of the drill tool caused by sliding drilling, and improving the drilling efficiency of the sub.

[0071] The intelligent directional rotary pup joint 100 for drilling comprises, from top to bottom, a pup joint body 1, which is fixedly connected to all parts of the pup joint 100; a slide groove 2, which is fixedly connected to the drilling tool below the pup joint 100; the bottom of the slide groove 2 is sealed with the pup joint body 1 by a first sealing ring, and the outer side of the top is sealed with a second sealing ring. A key groove 2-2 is machined inside to match the sliding pin extension 4-1 of the sliding pin 4. When at least a part of the sliding pin extension 4-1 of the sliding pin 4 is inserted into the key groove 2-2, the upper drilling tool drives the lower drilling tool to rotate. When the sliding pin extension 4-1 of the sliding pin 4 is separated from the key groove 2-2, the rotation of the upper drilling tool does not affect the lower drilling tool. The bottom of the slide 2 is machined with a second shoulder 2-3, which cooperates with the first shoulder 1-6 to prevent the bottom drilling tool from slipping off; the pin key 3 is symmetrically machined with two pin holes, namely the first pin hole 3-1 and the second pin hole 3-2, which are installed in the pin key installation groove 1-4, cooperate with the slide pin 4 and the slide 2, and control the rotation of the bottom drilling tool. When the slide pin extension 4-1 of the slide pin 4 is inserted into the keyway 2-2 of the slide 2, the upper drilling tool transmits the torque through the pin key 3; the bottom of the slide pin 4 is uniformly machined with four slide pin extensions 4-1 in the circumferential direction. When compound drilling is performed, the slide pin extension 4-1 is inserted into the keyway 2-2 of the slide 2 to make the upper and lower drilling tools linked. The top of the slide pin 4 is a slide pin body 4-2, on which four screw holes 4-3 are uniformly machined in the circumferential direction. The screw holes 4-3 are threaded and can cooperate with the screw 5-1. When the screw 5-1 rotates, the sliding pin 4 moves up and down; the motor 5-2 is a stepping motor, and the rotating shaft is the screw 5-1; the detection controller 5-3 has a built-in battery and chip circuit, detects and processes signals, controls the rotation of the motor, and inserts the sliding pin 4 into the slide slot 2 and exits the slide slot 2 through the forward and reverse rotation of the screw 5-1; the controller sheath 6 protects the motor 5-2, the controller 5-2 and the sliding pin 4, etc., so that they do not act on the well wall; the voltage monitoring sheet 7-2 and the detection magnetic sheet 7-1, the two detection magnetic sheets are used to generate a magnetic field, and the two voltage monitoring sheets are used to monitor the voltage. The voltage monitoring sheets are installed at intervals, and the connection line of the two voltage monitoring sheets is perpendicular to the connection line of the two detection magnetic sheets.

[0072] The intelligent directional rotary short section for drilling described in the present invention can be connected to the upper part of the single-bend screw, and the drill tool above the short section can rotate slowly without affecting the combined use of the drill tool below the short section, greatly reducing the sliding section of the drill tool, greatly reducing the drag and pressure of the drill tool caused by sliding drilling, and improving the drilling efficiency. It is particularly suitable for situations where the sliding directional drag and pressure are serious in large displacement and large inclination wells, and can reduce the drag and pressure of the drill tool caused by sliding drilling, thereby improving the drilling efficiency.

[0073] This application document is intended to illustrate how to use the disclosed technology and various embodiments, but is not intended to limit the scope and spirit to which it is actually directed and equivalent. In addition, the above description is not intended to be exhaustive of all possibilities or to limit the scope of protection to the precise form disclosed. According to the above teachings, changes and variations are possible. The selected and illustrated embodiments provide the best description of the principles of the technology and its practical application, and enable those skilled in the art to use the disclosed technology for various changes in various conceivable specific applications. Therefore, without substantially departing from the spirit and principles of the technology described herein, the various changes and modifications made to the above embodiments are intended to be included in the scope of this disclosure.

Claims

1. An intelligent steering rotary sub for drilling, characterized in that: include: A short section body, wherein the short section body is connected to the first drilling tool; a sliding pin and a sliding slot respectively connected to the sub body, wherein the sliding pin is movable between a first position and a second position, and the sliding slot is further connected to a second drilling tool; Wherein, in the first position, the sliding pin and the sliding groove are separated, the sliding pin and the short section body rotate with the first drilling tool, and the sliding groove rotates with the second drilling tool; in the second position, the sliding pin and the sliding groove are engaged, and the sliding pin drives the sliding groove and the second drilling tool and the short section body to rotate with the first drilling tool.

2. The intelligent steering rotary sub for drilling according to claim 1, characterized in that: The sliding pin includes a sliding pin body and a sliding pin extension extending from the sliding pin body, and the sliding slot includes a sliding slot body and a key slot disposed in the sliding slot body, and when the sliding pin is in the second position, the key slot receives at least a portion of the sliding pin extension.

3. The intelligent steering rotary sub for drilling according to claim 2, characterized in that: The sliding pin is connected to the short section body through a driving component, and the driving component includes a motor and a screw connected to the motor. The sliding pin further includes a screw hole arranged on the sliding pin body, and the screw hole is used to receive the screw. The sliding pin moves between the first position and the second position through the screw under the action of the motor.

4. The intelligent steering rotary sub for drilling according to claim 2, characterized in that: The invention further comprises a pin key disposed on the short section body and located between the sliding pin and the sliding groove. When the sliding pin is in the second position, the first drilling tool transmits the torque to the second drilling tool through the pin key.

5. The intelligent steering rotary sub for drilling according to claim 4, characterized in that: The pin key is located between the two sliding pin extensions.

6. The intelligent steering rotary sub for drilling according to claim 1, characterized in that: The sliding pin is sleeved on the upper part of the short section body, the sliding groove is sleeved on the lower part of the short section body, and the lower part includes a first shoulder arranged thereon, and the sliding groove includes a second shoulder arranged on the sliding groove body and cooperating with the first shoulder to prevent the second drilling tool from slipping off.

7. The intelligent steering rotary sub for drilling according to claim 6, characterized in that: It further includes a magnetic sheet and a voltage monitoring sheet arranged on the short section body, and the magnetic sheet and the voltage monitoring sheet are located above the sliding pin.

8. The intelligent steering rotary sub for drilling according to claim 7, characterized in that: The rotating short section is cylindrical, and a plurality of the magnetic sheets and a plurality of the voltage monitoring sheets are arranged at intervals along the circumference of the cylinder, and the connection lines between the two magnetic sheets intersect with the connection lines between the two voltage monitoring sheets.

9. The intelligent steering rotary sub for drilling according to claim 8, characterized in that: The two magnetic sheets and the two voltage monitoring sheets are arranged at intervals along the circumferential direction of the cylinder, and the connecting line of the two magnetic sheets is perpendicular to the connecting line of the two voltage monitoring sheets.

10. The intelligent steering rotary sub for drilling according to claim 1, characterized in that: It further includes a sheath connected to the short section body and the slide groove.

11. The intelligent steering rotary sub for drilling according to claim 10, characterized in that: It further includes a first sealing ring arranged between the short section body and the slide groove and a second sealing ring arranged between the slide groove and the sleeve.

12. A control method for an intelligent steering rotary sub for drilling according to any one of claims 1 to 11, characterized in that: The following steps are involved: Determine whether directional drilling or compound drilling is required based on the measured voltage; In response to a need for directional drilling, positioning the slide pin in a first position; and In response to the need for compound drilling, the slide pin is positioned in the second position.

13. The control method according to claim 12, characterized in that: The step of placing the sliding pin in the first position in response to the need for directional drilling includes: in response to the need for directional drilling, controlling the motor to rotate in a first direction to separate the sliding pin from the sliding slot, the sliding pin and the short section body rotate together with the first drilling tool connected to the short section body, and the sliding slot rotates with the second drilling tool connected to the sliding slot; and the step of placing the sliding pin in the second position in response to the need for composite drilling includes: in response to the need for composite drilling, controlling the motor to rotate in a second direction opposite to the first direction to engage the sliding pin and the sliding slot, the sliding pin drives the sliding slot and the second drilling tool to rotate together with the short section body along with the first drilling tool.

14. A drilling tool, characterized in that: The intelligent steerable rotary short section for drilling comprises the one described in any one of the preceding claims 1-11.

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