Release the short section assembly, fishing tool, and drill string data ball transmission system.

Abstract

This invention relates to a release sub assembly, a retrieval tool, and a data sphere transmission system within the drill string, specifically to the field of downhole high-capacity data transmission systems. It addresses the problem of downhole data transmission technologies being unable to upload large volumes of data to the surface. The system includes: a drill collar with an axial groove on its outer periphery; a push-pull rod mechanism slidably disposed within the axial groove; a communication module assembly disposed on the drill collar for acquiring downhole information; and a data sphere disposed within the push-pull rod mechanism, electrically connected to the communication module assembly for storing the downhole information acquired by the communication module assembly. In this invention, a retrieval tool pushes the push-pull rod mechanism to the data sphere retrieval position, allowing the data sphere to enter the central channel through the opening in the sphere cavity. This facilitates the subsequent retrieval of the data sphere from downhole to the surface by the retrieval tool, and the data stored within the data sphere can be replayed using a surface reader / writer.

Description

Technical Field

[0001] This invention relates to the field of downhole high-capacity data transmission while drilling systems, and particularly to a release sub assembly, a retrieval tool, and a data ball transmission system within the drill string. Background Technology

[0002] As oil and gas exploration and development deepens, deep and ultra-deep formations, unconventional and low-grade oil and gas resources are gradually becoming important areas for increasing reserves and production. In order to accurately characterize the drilled formation structure and exploit deep and complex oil and gas reservoirs, drilling-while-predicting technology, downhole engineering parameter measurement technology and drilling-while-imaging logging technology are used during the drilling process, resulting in a large amount of data.

[0003] However, existing traditional downhole data transmission technologies such as mud pulses cannot upload large amounts of data to the surface, thus failing to meet operational requirements.

[0004] In other words, existing downhole data transmission technologies have the problem of being unable to upload large amounts of data to the surface. Summary of the Invention

[0005] This invention provides a release sub-assembly to solve the problem of downhole data transmission technology being unable to upload large amounts of data to the surface.

[0006] This invention provides a release sub assembly, comprising: a drill collar with an axial groove on its outer periphery; a push-pull rod mechanism slidably disposed within the axial groove; a communication module assembly disposed on the drill collar for acquiring downhole information; and a data ball disposed within the push-pull rod mechanism, the data ball being electrically connected to the communication module assembly for storing the downhole information acquired by the communication module assembly; wherein, the axial groove has a ball cavity opening communicating with the central channel of the drill collar, and when the push-pull rod mechanism slides to the ball retrieval position, the data ball enters the central channel from the ball cavity opening so that a retrieval tool can retrieve it from downhole.

[0007] In one embodiment, there are multiple data balls, which are spaced apart in the push-pull rod mechanism. Each data ball has a corresponding ball-retrieving position in the axial groove. When the push-pull rod mechanism slides to the ball-retrieving position, the data ball corresponding to the ball-retrieving position enters the central channel from the ball cavity opening.

[0008] In one embodiment, the push-pull rod mechanism includes: a rod body, on one end near the wellhead, having a plurality of first through holes spaced apart along a first direction; a plurality of mounting assemblies, each corresponding to one of the plurality of first through holes, wherein a data ball is detachably fixed in the corresponding mounting assembly and communicates with the communication module assembly; a plurality of ejection assemblies, each corresponding to one of the plurality of mounting assemblies; and a positioning assembly connected to the rod body for positioning the rod body in the initial installation position of the axial slide groove; wherein the ejection assembly is capable of ejecting the data ball in the corresponding mounting assembly from the ball cavity opening into the central channel.

[0009] In one embodiment, the mounting assembly includes: a PCB base fixed at the top opening of the first through hole; a connector disposed on the PCB base and inserted into the data ball; a push-pull lever compartment cover covering the PCB base; and a conductive structure disposed between the push-pull lever compartment cover and the PCB base for conducting communication between the data ball and the communication module assembly.

[0010] In one embodiment, the ejection assembly includes: a spring ring sleeved on the data ball for supporting the data ball and radially positioning it; and a first spring disposed between the spring ring and the PCB board base, one end of which is connected to the spring ring and the other end of which is connected to the PCB board base; wherein, when the push-pull rod mechanism is installed in the axial groove, the data ball abuts against the bottom of the axial groove, the first spring is compressed, the data ball is inserted into the connector, and the conductive structure connects the data ball and the communication module assembly.

[0011] In one embodiment, the conductive structure includes: a conductive plate track disposed at the bottom of the push-pull lever compartment cover, the conductive plate track being electrically connected to the communication module assembly; and a conductive plate disposed on the end of the PCB board base away from the connector; wherein, when the push-pull lever compartment cover is placed on the PCB board base, the conductive plate track and the conductive plate are in contact and connected.

[0012] In one embodiment, a first sealing groove is provided at the bottom of the push-pull rod compartment cover plate, a conductive sheet track is located inside the first sealing groove, and a first sealing ring is installed in the first sealing groove to seal the gap between the push-pull rod compartment cover plate and the top opening of the first through hole.

[0013] In one embodiment, a second sealing groove is provided on the outer periphery of the first through hole, and a second sealing ring is installed in the second sealing groove. The second sealing ring is used to seal the contact surface between the rod body and the axial sliding groove.

[0014] In one embodiment, a second through hole is provided on the end of the rod away from the wellhead. The positioning assembly includes: a second spring, one end of which is connected to the end of the rod near the wellhead, and the other end of which is connected to the sidewall of the axial sliding groove; and a first trigger pin, which is telescopically disposed in the second through hole and partially extends into the trigger pin opening; wherein, when the rod slides to the initial installation position, the second spring is stretched to generate a pull-back force, and under the action of the pull-back force, the first trigger pin is locked in the trigger pin opening.

[0015] In one embodiment, a plurality of third through holes are also provided at intervals on the rod body, which are located between the second through hole and the first through hole. Each third through hole is provided with a second trigger pin. When the push-pull rod mechanism slides to the ball-retrieval position corresponding to the data ball inside, the first trigger pin extends from the trigger pin opening into the central channel and contacts the retrieval tool. At the same time, the second trigger pin adjacent to the first trigger pin is locked in the trigger pin opening.

[0016] In one embodiment, the number of first through holes and third through holes are equal, the center distance D1 between two adjacent first through holes is equal to the center distance D2 between two adjacent third through holes, and the center distance D3 between a second through hole and its adjacent third through hole is equal to the center distance D1.

[0017] In one embodiment, the drill neck is further provided with a communication circuit compartment and a wire passage hole connected to the communication circuit compartment. The communication module assembly includes: a communication circuit board disposed in the communication circuit compartment; and wires passing through the wire passage hole. The wires are used to conduct electricity between the communication circuit board and the data ball, and to conduct electricity between the communication circuit board and the downhole testing instrument.

[0018] The present invention also provides a retrieval tool for retrieving a data ball from a release sub assembly according to any one of claims 1 to 12, comprising: a retrieval head for retrieving the data ball; a float disposed on the retrieval head; and a retrieval spear disposed on the float; wherein the retrieval tool floats up and detaches from the release sub assembly due to the buoyancy of the float; and the retrieval spear can be hooked and connected to an external hook at the wellhead to allow the retrieval tool to be removed.

[0019] In one embodiment, the retrieval head includes: a retrieval rod that passes through and is fixedly connected to the float; an upper lip that is sleeved on and slidably connected to the retrieval rod; a lower lip that is disposed at the bottom end of the retrieval rod; a third spring that is sleeved on the retrieval rod, one end of the third spring being connected to the float and the other end of the third spring being connected to the upper lip; and a guide head disposed at the end of the lower lip away from the upper lip, the guide head being used to push the push-pull rod mechanism to slide to the ball-collecting position; wherein the retrieval tool has an initial state and a ball-collecting state, when the retrieval tool is in the initial state, the third spring presses the upper lip tightly onto the lower lip, and a retrieval cavity for collecting data balls is defined between the upper and lower lips; when the retrieval tool is in the ball-collecting state, the lower lip moves away from the upper lip, and the data ball is located between the lower and upper lips.

[0020] The present invention also provides a data ball transmission system within a drill string, comprising: the aforementioned release sub assembly; and the aforementioned retrieval tool; wherein the retrieval tool is used to retrieve the data ball within the release sub assembly.

[0021] Compared with existing technologies, the advantages of this invention lie in the fact that the retrieval tool pushes the push-pull rod mechanism to the ball retrieval position, allowing the data ball to enter the central channel through the ball cavity opening from within the push-pull rod mechanism. This facilitates the subsequent retrieval of the data ball from downhole to the surface by the retrieval tool. The data stored within the data ball can then be replayed using a surface reader. By releasing the data ball downhole and using the drill string channel to upload large-capacity data (the massive amount of downhole information stored within the data ball) such as logging-while-drilling data to the surface, the invention achieves the purpose of large-capacity downhole data transmission and guiding geological directional drilling. Attached Figure Description

[0022] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0023] Figure 1 This is a front sectional view of the release segment assembly in Embodiment 1 of the present invention;

[0024] Figure 2 yes Figure 1 A top view of the released short section component;

[0025] Figure 3 yes Figure 1 A three-dimensional structural diagram of the cover plate of the middle release short section assembly;

[0026] Figure 4 yes Figure 1 Schematic diagram of the structure of the push-pull rod mechanism;

[0027] Figure 5 yes Figure 1 Schematic diagram of the ejection assembly and the mounting assembly;

[0028] Figure 6 This is a schematic diagram of the structural composition of the salvage tool in Embodiment 2 of the present invention (initial state);

[0029] Figure 7 This is a schematic diagram of the structural composition of the retrieval tool in Embodiment 2 of the present invention (in the ball-retrieval state);

[0030] Figure 8 This is a schematic diagram of the structure of the data ball transmission system inside the drill string in Embodiment 3 of the present invention (the guide head is not in contact with the first excitation pin);

[0031] Figure 9 This is a schematic diagram of the structure of the data ball transmission system inside the drill string in Embodiment 3 of the present invention (the first data ball enters the reduced diameter hole);

[0032] Figure 10 This is a schematic diagram of the structure of the data ball transmission system inside the drill string in Embodiment 3 of the present invention (the second data ball enters the reduced diameter hole);

[0033] Figure 11 This is a schematic diagram of the structure of the data ball transmission system inside the drill string in Embodiment 3 of the present invention (the third data ball enters the reduced diameter hole);

[0034] Figure 12 This is a schematic diagram of the structure of the data ball transmission system inside the drill string in Embodiment 3 of the present invention (the data ball is retrieved from the reduced diameter hole);

[0035] Figure 13 This is a flowchart of the salvage method in Embodiment 4 of the present invention.

[0036] Figure label:

[0037] 10. Drill neck; 11. Axial groove; 111. Ball cavity opening; 112. Excitation pin opening; 12. Center channel; 121. Reducing diameter shoulder; 122. Reducing diameter hole; 13. Communication circuit compartment; 14. Through hole; 20. Push-pull rod mechanism; 21. Rod body; 211. First through hole; 212. Second through hole; 213. Third through hole; 22. Sealing assembly; 221. PCB board base; 222. Connector; 223. Excitation pin compartment cover; 224. Spring compartment cover; 225. Push-pull rod compartment cover; 226. Conductive structure; 2261. Conductive sheet track; 2262. Conductive sheet; 227. 1. Sealing ring; 228. Second sealing ring; 23. Ejection assembly; 231. Spring ring; 232. First spring; 24. Positioning assembly; 241. Second spring; 242. First trigger pin; 243. Second trigger pin; 30. Communication module assembly; 31. Communication circuit board; 32. Communication circuit compartment cover; 40. Data ball; 50. Fishing chamber; 100. Release section assembly; 200. Salvage tool; 201. Salvage head; 2011. Salvage rod; 2012. Upper lip; 2013. Lower lip; 2014. Third spring; 2015. Guide head; 202. Float; 203. Salvage spear. Detailed Implementation

[0038] The invention will now be further described with reference to the accompanying drawings.

[0039] Example 1

[0040] like Figure 1 and Figure 2 As shown, the present invention provides a release sub assembly 100, which includes a drill collar 10, a push-pull rod mechanism 20, a communication module assembly 30, and a data ball 40. The drill collar 10 has an axial groove 11 on its outer periphery; the communication module assembly 30 is disposed on the drill collar 10 for collecting downhole information; the data ball 40 is disposed within the push-pull rod mechanism 20 and electrically connected to the communication module assembly 30 for storing the downhole information collected by the communication module assembly 30; the axial groove 11 has a ball cavity opening 111 that communicates with the central channel 12 of the drill collar 10. When the push-pull rod mechanism 20 slides to the ball retrieval position, the data ball 40 enters the central channel 12 from the ball cavity opening 111, allowing a retrieval tool to retrieve it from the downhole.

[0041] In the above setup, the retrieval tool pushes the push-pull rod mechanism 20 to the ball retrieval position, allowing the data ball 40 to enter the central channel 12 through the ball cavity opening 111 from within the push-pull rod mechanism 20. This facilitates the subsequent retrieval of the data ball 40 from downhole to the surface by the retrieval tool. The data stored within the data ball 40 is then played back via a surface reader. By releasing the data ball 40 downhole and using the drill string channel to upload large-capacity data (the massive amount of downhole information data stored in the data ball 40) such as logging-while-drilling data to the surface, the purpose of large-capacity downhole data transmission and guiding geological directional drilling is achieved.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the drill neck 10 has an internal diameter variation. The water inlet at the left end is larger with an inner diameter of φ70mm, while the water inlet at the right end is smaller with an inner diameter of φ50mm.

[0043] It should be noted that, because the drill string is a closed-loop system, once the data sphere 40 is released into the drill string, there is virtually no possibility of it not being retrieved. Reading the data from the data sphere on the surface quickly presents the downhole conditions and the drilled formation structure, providing supporting data for fast, efficient, and safe drilling.

[0044] It should be noted that, since the entire retrieval process takes place inside the drill string, the probability of the data ball 40 being captured and recovered to the surface is very high, enabling the drill string data ball transmission system to be reliably applied in fields such as data transmission while drilling and downhole completion data monitoring.

[0045] Specifically, such as Figure 4 As shown, in one embodiment, there are multiple data balls 40, which are spaced apart in the push-pull rod mechanism 20. Each data ball 40 has a corresponding ball-taking position in the axial slide groove 11. When the push-pull rod mechanism 20 slides to the ball-taking position, the data ball 40 corresponding to the ball-taking position enters the central channel 12 from the ball cavity opening 111.

[0046] In the above setup, by using multiple data spheres 40, complete downhole information can be collected, ensuring that the data transmitted back to the surface can better guide geological directional drilling. Furthermore, by using a retrieval tool to retrieve one data sphere 40 at a time, and sequentially retrieving multiple data spheres 40, the data stored within each data sphere 40 can be played back sequentially using a surface reader. This improves the reliability and accuracy of data retrieval.

[0047] Furthermore, such as Figure 4 As shown, in one embodiment, there are three data balls 40, which are spaced apart within the push-pull rod mechanism 20. Of course, depending on the actual situation, one, four, or more data balls 40 can be provided.

[0048] Specifically, such as Figure 4 As shown, in one embodiment, the push-pull rod mechanism 20 includes a rod body 21, multiple mounting assemblies 22, multiple ejection assemblies 23, and a positioning assembly 24. The rod body 21 has multiple first through holes 211 spaced apart along a first direction at its end near the wellhead. Multiple mounting assemblies 22 are correspondingly disposed within the multiple first through holes 211, and a data ball 40 is detachably fixed within the corresponding mounting assembly 22, connecting the data ball 40 to the communication module assembly 30. Multiple ejection assemblies 23 are correspondingly disposed within the multiple mounting assemblies 22. The positioning assembly 24 is connected to the rod body 21 and is used to position the rod body 21 at the initial installation position of the axial slide groove 11. The ejection assembly 23 can eject the data ball 40 within the corresponding mounting assembly 22 from the ball cavity opening 111 into the central channel 12.

[0049] Furthermore, such as Figure 4 As shown, in one embodiment, the push-pull rod mechanism 20 includes three seating assemblies 22 and three ejection assemblies 23. Of course, depending on the actual situation, one or four or more seating assemblies 22 and ejection assemblies 23 can be provided.

[0050] Specifically, such as Figure 5 As shown, in one embodiment, the mounting assembly 22 includes a PCB base 221, a connector 222, a push-pull lever compartment cover 225, and a conductive structure 226. The ejection assembly 23 includes a spring ring 231 and a first spring 232. The PCB base 221 is fixed at the top opening of the first through hole 211; the connector 222 is disposed on the PCB base 221 and is inserted into the data ball 40; the spring ring 231 is sleeved on the data ball 40 to support it and provide radial positioning; the first spring 232 is disposed between the spring ring 231 and the PCB base 221, with one end connected to the spring ring 231 and the other end connected to the PCB base 221; the push-pull lever compartment cover 225 covers the PCB base 221; and the conductive structure 226 is disposed between the push-pull lever compartment cover 225 and the PCB base 221 to facilitate communication between the data ball 40 and the communication module assembly 30.

[0051] When the push-pull rod mechanism 20 is installed in the axial groove 11, the data ball 40 contacts the bottom of the axial groove 11, the first spring 232 is compressed, and the data ball 40 is inserted into the connector 222. The conductive structure 226 connects the data ball 40 and the communication module assembly 30. Thus, when the data ball 40 slides with the rod 21 to the corresponding ball retrieval position, the data ball 40 does not contact the bottom of the axial groove 11. The first spring 232 applies a restoring force to the spring ring 231, which pushes the data ball 40 into the ball cavity opening 111, simultaneously separating the data ball 40 from the connector 222. The data ball 40 enters the central channel 12 through the ball cavity opening 111, allowing the retrieval tool to retrieve it from the well.

[0052] Specifically, such as Figure 3 As shown, in one embodiment, the conductive structure 226 includes a conductive plate track 2261 and a conductive plate 2262. The conductive plate track 2261 is disposed at the bottom of the push-pull lever compartment cover 225 and is electrically connected to the communication module assembly 30. The conductive plate 2262 is disposed on the end of the PCB board base 221 away from the connector 222. When the push-pull lever compartment cover 225 is placed on the PCB board base 221, the conductive plate track 2261 and the conductive plate 2262 make contact and conduct electricity.

[0053] Specifically, such as Figure 3 As shown, in one embodiment, a first sealing groove is provided at the bottom of the push-pull rod compartment cover 225, and a conductive sheet track 2261 is located inside the first sealing groove. A first sealing ring 227 is installed in the first sealing groove to seal the gap between the push-pull rod compartment cover 225 and the top opening of the first through hole 211. This effectively prevents external mud from entering the first through hole 211 through the gap between the push-pull rod compartment cover 225 and the top opening of the first through hole 211 and damaging the data ball 40. This ensures that the data ball 40 can work normally.

[0054] Specifically, such as Figure 4 As shown, in one embodiment, a second sealing groove (not connected to the central channel 12) is provided on the outer periphery of the first through hole 211. A second sealing ring 228 is installed in the second sealing groove to seal the contact surface between the axial sliding groove 11 and the rod body 21. This ensures the sealing of the outer portions at both ends of the first through hole 211, effectively preventing external mud from entering the first through hole 211 through any gaps that may exist at both ends and damaging the data ball 40, thereby ensuring that the data ball 40 can work normally.

[0055] Specifically, such as Figure 4As shown, in one embodiment, a second through hole 212 is provided on the end of the rod 21 away from the wellhead. An excitation pin opening 112 communicating with the central channel 12 is also provided in the axial groove 11, spaced apart from the ball cavity opening 111 in a first direction. The positioning assembly 24 includes a second spring 241 and a first excitation pin 242. One end of the second spring 241 is connected to the end of the rod 21 near the wellhead, and the other end is connected to the sidewall of the axial groove 11. The first excitation pin 242 is telescopically disposed within the second through hole 212, and partially extends into the excitation pin opening 112. When the rod 21 slides to the initial installation position, the second spring 241 stretches to generate a pull-back force. Under the action of the pull-back force, the first excitation pin 242 is locked within the excitation pin opening 112.

[0056] In the above configuration, the first actuation pin 242 and the second spring 241 cooperate to lock the first actuation pin 242 into the ball cavity opening 111. This achieves the installation and positioning of the rod 21 within the axial groove 11, thereby ensuring the normal operation of the release section assembly 100.

[0057] Specifically, such as Figure 4 As shown, in one embodiment, a plurality of third through holes 213 are also provided at intervals on the rod body 21, which are located between the second through hole 212 and the first through hole 211, and a second triggering pin 243 is provided in each third through hole 213.

[0058] Specifically, such as Figure 4 As shown, in one embodiment, there are three data balls 40, which are spaced apart within the push-pull rod mechanism 20. Specifically, the first data ball is farther from the wellhead relative to the other data balls, the third data ball is closer to the wellhead relative to the other data balls, and the second data ball is located between the first and third data balls. The first, second, and third data balls correspond to the first, second, and third ball retrieval positions, respectively.

[0059] Specifically, such as Figure 9 As shown, in one embodiment, when the push-pull rod mechanism 20 slides to the first ball-retrieving position corresponding to the first data ball inside it, the first trigger pin 242 extends from the trigger pin opening 112 into the central channel 12 and comes into contact with the retrieval tool, while the second trigger pin 243 adjacent to the first trigger pin 242 is locked in the trigger pin opening 112.

[0060] In the above configuration, since the first trigger pin 242 is in contact with the retrieval tool, the retrieval tool can apply thrust to the first trigger pin 242. This pushes the push-pull rod mechanism 20 to slide within the axial groove 11 to the first ball retrieval position. This ensures that the first data ball can enter the central channel 12 from the ball cavity opening 111, facilitating retrieval by the retrieval tool. At this time, the second trigger pin 243, adjacent to the first trigger pin 242, is locked within the trigger pin opening 112 (due to the limitation of the retrieval tool below, the second trigger pin 243 cannot extend into the central channel 12 at this time). As the retrieval tool retrieves the first data ball and moves towards the wellhead, the second trigger pin 243 is locked in the trigger pin opening 112, preventing the rod body 21 from returning to its initial installation position under the pull force of the second spring 241. At the same time, the rod body 21 is repositioned for a second time, facilitating the retrieval tool's next retrieval of the second data ball.

[0061] Specifically, during the process of the retrieval tool retrieving the first data ball and moving it towards the wellhead, when the retrieval tool moves to a point where it is misaligned with the second trigger pin 243, which is locked within the trigger pin opening 112, the second trigger pin 243 extends into the central channel 12. At this time, the front end of the retrieval tool can abut against the second trigger pin 243, and by pushing the second trigger pin 243 towards the bottom of the well, the push-pull rod mechanism 20 is pushed again to slide within the axial groove 11 as shown in the attached figure. Figure 10 The second ball-retrieving position is shown. When the push-pull mechanism 20 reaches the second ball-retrieving position, another second trigger pin 243 adjacent to the second trigger pin 243 is locked in the trigger pin opening 112.

[0062] In the above configuration, since the second trigger pin 243 is in contact with the retrieval tool, the retrieval tool can apply thrust to the second trigger pin 243 when retrieving the second data ball for the second time. This pushes the push-pull rod mechanism 20 to slide within the axial groove 11 to the second ball retrieval position. This ensures that the second data ball can enter the central channel 12 from the ball cavity opening 111, facilitating retrieval by the retrieval tool. Since the adjacent second trigger pin 243 is locked within the trigger pin opening 112, during the process of the retrieval tool retrieving the second data ball and moving towards the wellhead, the other second trigger pin 243 is locked in the trigger pin opening 112, preventing the rod body 21 from returning to its initial installation position under the pull force of the second spring 241. Simultaneously, the rod body 21 is repositioned a third time to facilitate the retrieval tool's next retrieval of the third data ball.

[0063] Specifically, during the process of the retrieval tool retrieving the second data ball and moving it towards the wellhead, when the retrieval tool moves to a point where it is misaligned with the second trigger pin 243 that is locked in the trigger pin opening 112, the second trigger pin 243 extends into the central channel 12. At this time, the front end of the retrieval tool can abut against the second trigger pin 243, and by pushing the second trigger pin 243 towards the bottom of the well, it can further push the push-pull rod mechanism 20 to slide within the axial groove 11 as shown in the attached figure. Figure 11 The third ball-retrieving position is shown. When the push-pull mechanism 20 reaches the third ball-retrieving position, the third second trigger pin 243 adjacent to the second trigger pin 243 is locked in the trigger pin opening 112.

[0064] In the above configuration, since the other second trigger pin 243 is in contact with the retrieval tool, the retrieval tool can apply thrust to the second trigger pin 243 during the third retrieval of the third data ball. This pushes the push-pull rod mechanism 20 to slide within the axial groove 11 to the third ball retrieval position. This ensures that the third data ball can enter the central channel 12 from the ball cavity opening 111, facilitating retrieval by the retrieval tool. Since the third second trigger pin 243 is locked within the trigger pin opening 112, during the retrieval tool's movement towards the wellhead after retrieving the third data ball, the third second trigger pin 243 is locked within the trigger pin opening 112, preventing the rod body 21 from returning to its initial installation position under the pull of the second spring 241. Simultaneously, the rod body 21 is positioned a fourth time to ensure that after all data balls are retrieved, the rod body 21 is fixed within the axial groove 11, preventing it from wobbling within the axial groove 11 and affecting subsequent operations.

[0065] Specifically, such as Figure 4 As shown, in one embodiment, the number of first through holes 211 and third through holes 213 are equal, the center-to-center distance D1 between two adjacent first through holes 211 is equal to the center-to-center distance D2 between two adjacent third through holes 213, and the center-to-center distance D3 between a second through hole 212 and its adjacent third through hole 213 is equal to the center-to-center distance D1. This ensures that the retrieval tool can retrieve the corresponding data ball each time it is lowered to the same fixed position downhole. That is, the retrieval positions for the first, second, and third data balls are the same, thereby improving the convenience of on-site retrieval.

[0066] Specifically, such as Figure 1 and Figure 2 As shown, in one embodiment, the drill neck 10 is further provided with a communication circuit compartment 13 and a wire passage hole 14 connected to the communication circuit compartment 13. The communication module assembly 30 includes a communication circuit board 31 and wires. The communication circuit board 31 is disposed inside the communication circuit compartment 13; the wires pass through the wire passage hole 14 and are used to connect the communication circuit board 31 and the data ball 40, as well as to connect the communication circuit board 31 and the downhole testing instrument.

[0067] Specifically, such as Figure 2 and Figure 3 As shown, in one embodiment, the communication module assembly 30 further includes a communication circuit compartment cover 32, which is sealed over the communication circuit compartment 13.

[0068] Specifically, such as Figure 2 and Figure 3 As shown, in one embodiment, the seating assembly 22 further includes an actuation pin compartment cover 223 and a spring compartment cover 224, which cover the axial groove 11. The actuation pin compartment cover 223 is located above the second actuation pin 243 of the first actuation pin 242, and the spring compartment cover 224 is located above the first spring 232. The actuation pin compartment cover 223, the spring compartment cover 224, and the push-pull rod compartment cover 225 form an integral cover on the axial groove 11.

[0069] Example 2

[0070] like Figure 6 and Figure 7 As shown, the present invention also provides a retrieval tool 200 for retrieving the data ball 40 from the aforementioned release sub assembly 100. The tool includes a retrieval head 201, a float 202, and a retrieval spear 203. The retrieval head 201 is used to retrieve the data ball 40; the float 202 is mounted on the retrieval head 201; and the retrieval spear 203 is mounted on the float 202. The retrieval tool 200 floats up and detaches from the release sub assembly 100 due to the buoyancy of the float 202; the retrieval spear 203 can be hooked and connected to an external hook at the wellhead to allow the retrieval tool 200 to be retrieved.

[0071] Specifically, such as Figure 6 and Figure 7As shown, in one embodiment, the retrieval head 201 includes a retrieval rod 2011, an upper lip 2012, a lower lip 2013, and a third spring 2014. The retrieval rod 2011 passes through and is fixedly connected to the float 202; the upper lip 2012 is sleeved on and slidably connected to the retrieval rod 2011; the lower lip 2013 is located at the bottom end of the retrieval rod 2011; the third spring 2014 is sleeved on the retrieval rod 2011, one end of which is connected to the float 202, and the other end is connected to the upper lip 2012; a guide head 2015 is located at the end of the lower lip 2013 away from the upper lip 2012. 15 is used to push the push-pull rod mechanism 20 to slide to the ball-collecting position; the retrieval tool 200 has an initial state and a ball-collecting state. When the retrieval tool 200 is in the initial state, the third spring 2014 presses the upper lip 2012 against the lower lip 2013, and the upper lip 2012 and the lower lip 2013 define a retrieval chamber 50 for collecting the data ball 40; when the retrieval tool 200 is in the ball-collecting state, the lower lip 2013 moves away from the upper lip 2012, and the data ball 40 is located between the lower lip 2013 and the upper lip 2012.

[0072] Specifically, the float 202 is hollow inside and has a low density, allowing it to float on the mud. The salvage head 201 consists of a third spring 2014, an upper lip 2012, a lower lip 2013, and a guide head 2015.

[0073] Specifically, the outer diameter of the upper lip 2012 is larger than that of the lower lip 2013. The third spring 2014 is connected to the upper lip 2012, and the lower lip 2013 is connected to the guide head 2015 and fixed at the bottom of the retrieval tool.

[0074] In the initial state, the third spring 2014 applies a thrust to make the upper lip 2012 and the lower lip 2013 bite together to form a catching cavity that can accommodate multiple data balls at the same time.

[0075] When the ball is in the catching state, the upper lip 2012 is pushed open and the third spring 2014 is compressed, causing the upper lip 2012 and the lower lip 2013 to separate, at which point the data ball 40 can enter or leave the catching chamber.

[0076] The salvage principle of the salvage tool in this application is explained below:

[0077] The retrieval tool enters the water hole of the release section assembly 100. The upper lip is confined outside the core area of ​​the release section (the area on the left side of the narrowed shoulder 121 of the central channel 12), while the lower lip of the retrieval chamber and the guide head enter the core area of ​​the release section (the area on the right side of the narrowed shoulder 121 of the central channel 12, i.e., inside the narrowed hole 122). Thus, the retrieval chamber is open, and the data ball enters the retrieval chamber from the release section in the core area of ​​the release section.

[0078] Reference Figure 8 When the seeker head has not yet contacted the first trigger pin, the seeker head is in the large water eye on the left end, and the fishing chamber is closed.

[0079] Reference Figure 9 The guide head pushes the first trigger pin to move, which in turn drives the push-pull rod (rod 21) to move. At this time, the fishing chamber is open. The first data ball enters the opening of the ball chamber and is ejected into the water eye, entering the fishing chamber of the fishing tool.

[0080] Reference Figure 10 The guide head pushes the second trigger pin to move, which in turn moves the push-pull rod, at which point the fishing chamber is open. The second data ball enters the opening of the ball chamber and is ejected into the water eye, entering the fishing chamber of the retrieval tool.

[0081] Reference Figure 11 The second trigger pin drives the push-pull rod to move, at which point the fishing chamber opens. The third data ball enters the opening of the ball chamber and is ejected into the water eye, entering the fishing chamber of the retrieval tool.

[0082] Reference Figure 12 As the salvage tool rises and leaves the core area of ​​the release section, the retrieval chamber closes, and the data ball is firmly confined within the retrieval chamber. As the salvage tool returns to the ground (in this application, only one data ball 40 is retrieved at a time, and three data balls 40 are retrieved in sequence), the salvage tool will return to the ground.

[0083] Example 3

[0084] like Figures 8 to 12 As shown, the present invention also provides a data ball transmission system within a drill string, including the aforementioned release sub assembly 100 and the aforementioned retrieval tool 200. The retrieval tool 200 is used to retrieve the data ball 40 within the release sub assembly 100.

[0085] It should be noted that the present invention uses a data ball 40 to transfer downhole data. The data ball 40 is retrieved from downhole to the surface by releasing the short section assembly 100 and the retrieval tool 200, and the data is downloaded on the surface. This method achieves large-capacity data transmission and can be used for data transmission in logging-while-drilling imaging and data transmission in well completion monitoring. Its application prospects are broad.

[0086] Example 4

[0087] The present invention also provides a retrieval method for retrieving the data ball 40 (see reference) from the aforementioned release segment assembly. Figure 13 ), which includes:

[0088] Step S1 requires acquiring geological data and understanding the downhole conditions, installing the release sub (the aforementioned release sub assembly) on top of the downhole measuring tool, and enabling data communication.

[0089] Step S2: Deploy the fishing tool (fishing device) inside the drill pipe at the wellhead;

[0090] Step S3: Increase pump pressure and use mud flow to flush the fishing tool (fishing device) downhole;

[0091] Step S4: The retrieval tool (retrieval device) enters the release section;

[0092] Specifically, the retrieval tool enters the water inlet of the release section assembly. The upper lip is confined outside the core area of ​​the release section, the third spring of the retrieval tool is compressed, and the lower lip enters the core area of ​​the release section, thus opening the retrieval chamber. The guide head of the retrieval tool touches the data ball ejection mechanism (ejection assembly), and the data ball is ejected from the release section assembly and enters the retrieval chamber.

[0093] Step S5: Stop the pump. The retrieval tool rises to the surface using the buoyancy of the float and begins to detach from the release section. The third spring of the retrieval tool applies thrust to bite the upper and lower lips of the retrieval chamber together, and the retrieval chamber firmly captures the data ball.

[0094] Step S6: The salvage tool floats up along the inner wall of the drill rod (relying on the buoyancy of the float to float up along the drill rod);

[0095] Step S7: Remove the retrieval tool from the wellhead;

[0096] Step S8: Remove the data sphere from the salvage tool and replay the data using a ground reader.

[0097] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A release segment assembly, characterized in that, include: The drill neck (10) has an axial groove (11) on its outer periphery. The push-pull rod mechanism (20) is slidably disposed within the axial groove (11); The communication module component (30) is disposed on the drill string (10) and is used to collect downhole information; as well as A data ball (40) is disposed within the push-pull rod mechanism (20). The data ball (40) is electrically connected to the communication module assembly (30) and is used to store the downhole information collected by the communication module assembly (30). The axial groove (11) is provided with a ball cavity opening (111) that communicates with the central channel (12) of the drill neck (10). When the push-pull rod mechanism (20) slides to the ball retrieval position, the data ball (40) enters the central channel (12) from the ball cavity opening (111) so that the retrieval tool can retrieve it from the well. The number of data balls (40) is multiple, and the multiple data balls (40) are spaced apart in the push-pull rod mechanism (20). Each data ball (40) is provided with a corresponding ball-taking position in the axial slide groove (11). When the push-pull rod mechanism (20) slides to the ball-taking position, the data ball (40) corresponding to the ball-taking position enters the central channel (12) from the ball cavity opening (111). The push-pull rod mechanism (20) includes: The rod (21) has a plurality of first through holes (211) arranged at intervals along the first direction at one end near the wellhead. Multiple mounting components (22) are respectively disposed in multiple first through holes (211), and the data ball (40) is detachably fixed in the corresponding mounting component (22) and the data ball (40) is connected to the communication module component (30); Multiple ejection components (23) are respectively disposed on multiple mounting components (22); The positioning component (24) is connected to the rod (21) and is used to position the rod (21) at the initial installation position of the axial groove (11); The ejection assembly (23) is capable of ejecting the data ball (40) in the corresponding placement assembly (22) from the ball cavity opening (111) into the central channel (12); The seating assembly (22) includes: The PCB board base (221) is fixed at the top opening of the first through hole (211); and A connector (222) is disposed on the PCB board base (221), and the connector (222) is inserted into the data ball (40); A push-pull rod compartment cover (225) is installed on the PCB board base (221); A conductive structure (226) is disposed between the push-pull rod compartment cover (225) and the PCB board base (221) for conducting the data ball (40) and the communication module assembly (30).

2. The release segment assembly according to claim 1, characterized in that, The ejection assembly (23) includes: A spring ring (231) is fitted onto the data ball (40) to support the data ball (40) and to radially position it; and A first spring (232) is disposed between the spring ring (231) and the PCB board base (221), with one end connected to the spring ring (231) and the other end connected to the PCB board base (221); When the push-pull rod mechanism (20) is installed in the axial slide groove (11), the data ball (40) abuts against the bottom of the axial slide groove (11), the first spring (232) is compressed, the data ball (40) is inserted into the connector (222), and the conductive structure (226) connects the data ball (40) and the communication module assembly (30).

3. The release segment assembly according to claim 1, characterized in that, The conductive structure (226) includes: A conductive plate track (2261) is disposed at the bottom of the push-pull rod compartment cover (225), and the conductive plate track (2261) is electrically connected to the communication module assembly (30); and A conductive sheet (2262) is disposed on one end of the PCB board base (221) away from the connector (222); When the push-pull rod compartment cover (225) is placed on the PCB board base (221), the conductive sheet track (2261) and the conductive sheet (2262) make contact and conduction.

4. The release segment assembly according to claim 3, characterized in that, The bottom of the push-pull rod compartment cover (225) is provided with a first sealing groove, the conductive sheet track (2261) is located inside the first sealing groove, and a first sealing ring (227) is installed in the first sealing groove to seal the gap between the push-pull rod compartment cover (225) and the top opening of the first through hole (211).

5. The release segment assembly according to claim 3, characterized in that, A second sealing groove is provided on the outer periphery of the first through hole (211), and a second sealing ring (228) is installed in the second sealing groove. The second sealing ring (228) is used to seal the contact surface between the rod body (21) and the axial sliding groove (11).

6. The release segment assembly according to claim 1, characterized in that, A second through hole (212) is provided on the end of the rod (21) away from the wellhead. An excitation pin opening (112) communicating with the central channel (12) is also provided in the axial groove (11). It is spaced apart from the ball cavity opening (111) in the first direction. The positioning assembly (24) includes: The second spring (241) has one end connected to the end of the rod (21) near the wellhead, and its other end connected to the sidewall of the axial groove (11); and The first trigger pin (242) is telescopically disposed in the second through hole (212) and partially extends into the trigger pin opening (112); When the rod (21) slides to the initial installation position, the second spring (241) stretches to generate a pull force, and under the action of the pull force, the first excitation pin (242) is locked in the excitation pin opening (112).

7. The release segment assembly according to claim 6, characterized in that, Multiple third through holes (213) are also provided at intervals on the rod body (21), which are located between the second through hole (212) and the first through hole (211). Each third through hole (213) is provided with a second trigger pin (243). When the push-pull rod mechanism (20) slides to the ball-taking position corresponding to the data ball (40) inside it, the first trigger pin (242) extends from the trigger pin opening (112) into the central channel (12) and comes into contact with the retrieval tool. At the same time, the second trigger pin (243) adjacent to the first trigger pin (242) is locked in the trigger pin opening (112).

8. The release segment assembly according to claim 7, characterized in that, The number of the first through hole (211) and the third through hole (213) are equal. The center distance D1 between two adjacent first through holes (211) is equal to the center distance D2 between two adjacent third through holes (213). The center distance D3 between the second through hole (212) and its adjacent third through hole (213) is equal to the center distance D1.

9. The release segment assembly according to claim 1, characterized in that, The drill neck (10) is also provided with a communication circuit compartment (13) and a wire through hole (14) communicating with the communication circuit compartment (13). The communication module assembly (30) includes: The communication circuit board (31) is disposed within the communication circuit compartment (13); and The wire is threaded through the wire hole (14) and is used to connect the communication circuit board (31) and the data ball (40), as well as to connect the communication circuit board (31) and the downhole testing instrument.

10. A salvage tool, characterized in that, The retrieval tool (200) is used to retrieve the data ball (40) in the release segment assembly according to any one of claims 1 to 9, and comprises: A retrieval head (201) is used to retrieve the data ball (40). A buoy (202) is mounted on the salvage head (201); and The salvage spear (203) is mounted on the pontoon (202); The retrieval tool (200) floats up and detaches from the release section assembly by relying on the buoyancy of the float (202); the retrieval spear (203) can be hooked and connected to an external hook at the wellhead so that the retrieval tool (200) can be taken out. The salvage head (201) includes: A salvage rod (2011) is inserted into the buoy (202) and fixedly connected to the buoy (202); and The upper lip (2012) is fitted onto the retrieval rod (2011) and is slidably connected to the retrieval rod (2011); and The lower lip (2013) is located at the bottom end of the salvage rod (2011); A third spring (2014) is sleeved on the salvage rod (2011). One end of the third spring (2014) is connected to the float (202), and the other end of the third spring (2014) is connected to the upper lip (2012). A guide head (2015) is disposed at one end of the lower lip (2013) away from the upper lip (2012), and the guide head (2015) is used to push the push-pull rod mechanism (20) to slide to the ball-taking position; The retrieval tool (200) has an initial state and a ball-collecting state. When the retrieval tool (200) is in the initial state, the third spring (2014) presses the upper lip (2012) against the lower lip (2013), and the upper lip (2012) and the lower lip (2013) define a retrieval cavity (50) for collecting the data ball (40). When the retrieval tool (200) is in the ball-collecting state, the lower lip (2013) moves away from the upper lip (2012), and the data ball (40) is located between the lower lip (2013) and the upper lip (2012).

11. A data ball transmission system within a drill string, characterized in that, It includes: the release section assembly according to any one of claims 1 to 9 and the retrieval tool (200); The salvage tool (200) includes: A retrieval head (201) is used to retrieve the data ball (40). A buoy (202) is mounted on the salvage head (201); and The salvage spear (203) is mounted on the pontoon (202); The salvage tool (200) floats up and detaches from the release section assembly by relying on the buoyancy of the float (202); the salvage spear (203) can be hooked and connected to an external hook at the wellhead so that the salvage tool (200) can be taken out.

12. A data ball transmission system within a drill string, characterized in that, It includes: The release segment assembly according to any one of claims 1 to 9; as well as The salvage tool (200) as described in claim 10; The retrieval tool (200) is used to retrieve the data ball (40) inside the release section assembly.

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