Release nipple assembly, fishing tool and in-drill-string data ball transmission system

Abstract

The invention relates to a release nipple assembly, a fishing tool and a data ball transmission system in a drill string, relates to the technical field of underground large-capacity data while-drilling transmission systems, and aims to solve the problem that large-capacity data cannot be uploaded to the ground in an underground data transmission technology. The periphery of the drill collar is provided with an axial sliding groove; the push-pull rod mechanism is arranged in the axial chute in a sliding manner; the communication module assembly is arranged on the drill collar and used for collecting underground information; and the data ball is arranged in the push-pull rod mechanism, electrically connected with the communication module assembly and used for storing the underground information collected by the communication module assembly. According to the invention, the push-pull rod mechanism is pushed to a ball taking position by using the fishing tool, so that the data ball enters the central channel from the push-pull rod mechanism through the ball cavity opening. Therefore, the data ball can be conveniently fished to the ground from the underground by the fishing tool subsequently. And the data stored in the data ball is played back through the ground reader-writer.

Description

Technical Field

[0001] The invention relates to the technical field of underground large-capacity data transmission while drilling system, and in particular to a release nipple assembly, a fishing tool and a data ball transmission system in a drill string. Background Art

[0002] With the deepening of oil and gas exploration and development, deep, ultra-deep, unconventional and low-grade oil and gas resources have gradually become important positions for increasing reserves and production. In order to accurately depict the structure of the drilled formation and exploit deep complex structural oil and gas reservoirs, the drilling process uses the advanced prediction technology, downhole engineering parameter measurement technology and drilling imaging logging technology, which generates a large amount of data.

[0003] However, existing traditional downhole data transmission technologies such as mud pulse are unable to upload large amounts of data to the surface and cannot meet operational needs.

[0004] In other words, the existing downhole data transmission technology has the problem of being unable to upload large-capacity data to the ground. Summary of the invention

[0005] The present invention provides a release nipple assembly, which is used to solve the problem that large-capacity data cannot be uploaded to the ground in underground data transmission technology.

[0006] The present invention provides a release short section assembly, comprising: a drill collar, an axial sliding groove is arranged on the outer periphery of which; a push-pull rod mechanism, which is slidably arranged in the axial sliding groove; a communication module assembly, which is arranged on the drill collar and is used to collect downhole information; and a data ball, which is arranged in the push-pull rod mechanism, and the data ball is electrically connected to the communication module assembly and is used to store the downhole information collected by the communication module assembly; wherein a ball cavity opening connected to the central channel of the drill collar is arranged in the axial sliding groove, and when the push-pull rod mechanism slides to the ball taking position, the data ball enters into the central channel from the ball cavity opening, so that the data ball can be salvaged and taken out from the downhole by a salvage tool.

[0007] In one embodiment, there are multiple data balls, and the multiple data balls are arranged at intervals in the push-pull rod mechanism. Each data ball has a corresponding ball retrieval position in the axial slide groove. When the push-pull rod mechanism slides to the ball retrieval position, the data ball corresponding to the ball retrieval 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 of which is close to the wellhead, and has a plurality of first through holes arranged in sequence along a first direction; a plurality of seating components, which are arranged in a one-to-one correspondence in the plurality of first through holes, and a data ball is detachably fixed in the corresponding seating components, and the data ball is connected to the communication module component; a plurality of ejection components, which are arranged in a one-to-one correspondence in the plurality of seating components; a positioning component, which is connected to the rod body and is used to position the rod body in the initial installation position of the axial slide groove; wherein the ejection component can eject the data ball in the corresponding seating component from the ball cavity opening into the central channel.

[0009] In one embodiment, the seating assembly includes: a PCB board base, fixed at the top opening of the first through hole; and a connector, disposed on the PCB board base, the connector being plugged into a data ball; a push-pull rod compartment cover, covered on the PCB board base; and a conducting structure, disposed between the push-pull rod compartment cover and the PCB board base, for conducting the data ball and the communication module assembly.

[0010] In one embodiment, the ejection assembly includes: a spring ring, which is sleeved on the data ball, used to support the data ball and radially position it; and a first spring, which is arranged 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 slide groove, the data ball contacts the bottom of the axial slide groove, the first spring is compressed, the data ball is plugged 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 sheet track, which is arranged at the bottom of the push-pull rod compartment cover plate, and the conductive sheet track is electrically connected to the communication module assembly; and a conductive sheet, which is arranged on an end of the PCB board base away from the connector; wherein, when the push-pull rod compartment cover plate is covered on the PCB board base, the conductive sheet track is in contact with the conductive sheet and is conductive.

[0012] In one embodiment, a first sealing groove is provided at the bottom of the push-pull rod bin cover plate, the conductive sheet track is located inside the first sealing groove, and a first sealing ring is installed in the first sealing groove for sealing the gap between the push-pull rod bin 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, a second sealing ring is installed in the second sealing groove, and the second sealing ring is used to achieve sealing of 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 body away from the wellhead, and the positioning assembly includes: a second spring, one end of which is connected to the end of the rod body close to the wellhead, and the other end of which is connected to the side wall of the axial slide groove; and a first excitation pin, which is telescopically arranged in the second through hole and partially extends into the excitation pin opening; wherein, when the rod body slides to the initial installation position, the second spring is stretched to generate a pullback force, and under the action of the pullback force, the first excitation pin is clamped in the excitation pin opening.

[0015] In one embodiment, a plurality of third through holes are spaced apart on the rod body and are located between the second through hole and the first through hole, and a second excitation pin is disposed in each third through hole; when the push-pull rod mechanism slides to a ball retrieval position corresponding to a data ball therein, the first excitation pin extends from the excitation pin opening into the central channel and contacts the salvage tool, and at the same time, the second excitation pin adjacent to the first excitation pin is clamped in the excitation pin opening.

[0016] In one embodiment, the number of first through holes is equal to that of third through holes, 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 holes is equal to the center distance D1.

[0017] In one embodiment, a communication circuit compartment and a wire hole connected to the communication circuit compartment are also provided on the drill bit, and the communication module assembly includes: a communication circuit board, which is arranged in the communication circuit compartment; and wires, which are passed through the wire hole, and the wires are used to conduct the communication circuit board and the data ball, and to conduct the communication circuit board and the downhole testing instrument.

[0018] The present invention also provides a salvage tool, which is used to salvage the data ball in the release short section assembly of any one of claims 1 to 12, and comprises: a salvage head, which is used to salvage the data ball; a buoy, which is arranged on the salvage head; and a salvage spear, which is arranged on the buoy; wherein the salvage tool floats up and detaches from the release short section assembly by relying on the buoyancy of the buoy; and the salvage spear can be hooked and connected with an external hook at the wellhead so that the salvage tool can be taken out.

[0019] In one embodiment, the salvage head includes: a salvage rod, which is inserted into the buoy and fixedly connected to the buoy; an upper lip, which is sleeved on the salvage rod and slidably connected to the salvage rod; and a lower lip, which is arranged at the bottom end of the salvage rod; a third spring, which is sleeved on the salvage rod, one end of the third spring is connected to the buoy, and the other end of the third spring is connected to the upper lip; a guide head, which is arranged at an end of the lower lip away from the upper lip, and the guide head is used to push the push-pull rod mechanism to slide to a ball retrieval position; wherein the salvage tool has an initial state and a ball retrieval state, when the salvage tool is in the initial state, the third spring presses the upper lip against the lower lip, and a fishing cavity for collecting data balls is defined between the upper lip and the lower lip; when the salvage tool is in the ball retrieval state, the lower lip moves in a direction away from the upper lip, and the data ball is located between the lower lip and the upper lip.

[0020] The present invention also provides a data ball transmission system in a drill string, which comprises: the above-mentioned release short joint assembly; and the above-mentioned salvage tool; wherein the salvage tool is used to salvage the data ball in the release short joint assembly.

[0021] Compared with the prior art, the advantage of the present invention is that the push-pull rod mechanism is pushed to the ball-taking position by using the salvage tool, so that the data ball enters the central channel from the push-pull rod mechanism through the ball cavity opening. This facilitates the subsequent salvage of the data ball from the well to the ground. The data stored in the data ball is played back through the ground reader. In this way, the data ball is released downhole and the large-capacity data such as while-drilling imaging logging (massive downhole information data stored in the data ball) is uploaded to the ground through the channel in the drill string, thereby achieving the purpose of transmitting large-capacity data downhole and guiding geo-steering drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0023] Figure 1 is a main cross-sectional view of a release nipple assembly in Embodiment 1 of the present invention;

[0024] Figure 2 yes Figure 1 A top view of the release nipple assembly;

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

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

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

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

[0029] Figure 7 Schematic diagram of the structure of the fishing tool in the second embodiment of the present invention (ball fishing state);

[0030] Figure 8 Schematic diagram of the structure of the data ball transmission system in the drill string in the third embodiment of the present invention (the guide head does not contact the first excitation pin);

[0031] Fig. 9 Schematic diagram of the structure of the data ball transmission system in the drill string in the third embodiment of the present invention (the first data ball enters the reduced diameter hole);

[0032] Fig.10 Schematic diagram of the structure of the data ball transmission system in the drill string in the third embodiment of the present invention (the second data ball enters the reduced diameter hole);

[0033] Fig.11 Schematic diagram of the structure of the data ball transmission system in the drill string in the third embodiment of the present invention (the third data ball enters the reduced diameter hole);

[0034] Fig.12 It is a schematic diagram of the structural composition of the data ball transmission system in the drill string in the third embodiment of the present invention (the data ball is salvaged out of the reduced diameter hole);

[0035] Fig.13 It is a method flow chart of the salvage method in the fourth embodiment of the present invention.

[0036] Reference numerals:

[0037] 10. Drill support; 11. Axial slide; 111. Ball cavity opening; 112. Excitation pin opening; 12. Center channel; 121. Reduced diameter shoulder; 122. Reduced diameter hole; 13. Communication circuit compartment; 14. Wire hole; 20. Push-pull rod mechanism; 21. Rod body; 211. First through hole; 212. Second through hole; 213. Third through hole; 22. Seat 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. A sealing ring; 228, a second sealing ring; 23, an ejection assembly; 231, a spring ring; 232, a first spring; 24, a positioning assembly; 241, a second spring; 242, a first excitation pin; 243, a second excitation pin; 30, a communication module assembly; 31, a communication circuit board; 32, a communication circuit compartment cover; 40, a data ball; 50, a fishing chamber; 100, a release short section assembly; 200, a fishing tool; 201, a fishing head; 2011, a fishing rod; 2012, an upper lip; 2013, a lower lip; 2014, a third spring; 2015, a guide head; 202, a buoy; 203, a fishing spear. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Embodiment 1

[0040] like Figure 1 and Figure 2 As shown, the present invention provides a release nipple assembly 100, which includes a drill collar 10, a push-pull rod mechanism 20, a communication module assembly 30 and a data ball 40. Among them, an axial slide groove 11 is arranged on the outer periphery of the drill collar 10; the communication module assembly 30 is arranged in the drill collar 10, and is used to collect downhole information; the data ball 40 is arranged in the push-pull rod mechanism 20, and 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; a ball cavity opening 111 connected to the central channel 12 of the drill collar 10 is arranged in the axial slide groove 11, and when the push-pull rod mechanism 20 slides to the ball taking position, the data ball 40 enters the central channel 12 from the ball cavity opening 111, so that the salvage tool can salvage it from the downhole.

[0041] In the above arrangement, the push-pull rod mechanism 20 is pushed to the ball retrieval position by using a salvage tool, so that the data ball 40 enters the central channel 12 from the push-pull rod mechanism 20 through the ball cavity opening 111. This facilitates the subsequent salvage of the data ball 40 from the well to the ground. The data stored in the data ball 40 is played back through the ground reader. In this way, the data ball 40 is released downhole and large-capacity data such as while-drilling imaging logging (massive downhole information data stored in the data ball 40) is uploaded to the ground through the channel in the drill string, thereby achieving the purpose of transmitting large-capacity data downhole and guiding geo-steering drilling.

[0042] Specifically, Figure 1 and Figure 2 As shown, the inner diameter of the drill collar 10 is changed, the left end water hole is large, the inner diameter is φ70mm, and the right end water hole is small, the inner diameter is φ50mm.

[0043] It should be noted that since the drill string is a closed loop system, once the data ball 40 is released into the drill string, it will basically not be unrecoverable. The data of the data ball is read on the ground, so that the downhole working conditions and the structure of the drilled formation are quickly presented to people, providing support data for fast, efficient and safe drilling.

[0044] It should be noted that since the entire salvage process is carried out in the drill string, the probability of the data ball 40 being captured and recovered on the ground is very high, so that the data ball transmission system in the drill string can be reliably used in the fields of while-drilling data transmission and downhole completion data monitoring.

[0045] Specifically, Figure 4 As shown, in one embodiment, there are multiple data balls 40, and the multiple data balls 40 are arranged at intervals in the push-pull rod mechanism 20. Each data ball 40 is correspondingly provided with a ball picking position in the axial slide groove 11. When the push-pull rod mechanism 20 slides to the ball picking position, the data ball 40 corresponding to the ball picking position enters the central channel 12 from the ball cavity opening 111.

[0046] In the above configuration, complete downhole information can be collected by setting multiple data balls 40, thereby ensuring that the data transmitted back to the ground can better guide geo-steering drilling. In addition, a data ball 40 is salvaged each time by a salvage tool, multiple data balls 40 are salvaged one by one, and the data stored in the data balls 40 are replayed one by one by a ground reader. This improves the reliability and accuracy of data reading.

[0047] Furthermore, if Figure 4 As shown, in one embodiment, the number of data balls 40 is three, and the three data balls 40 are arranged at intervals in the push-pull rod mechanism 20. Of course, a single data ball 40, four data balls 40, or more than four data balls 40 can be arranged according to actual conditions.

[0048] Specifically, Figure 4 As shown, in one embodiment, the push-pull rod mechanism 20 includes a rod body 21, a plurality of seating components 22, a plurality of ejection components 23 and a positioning component 24. Among them, the rod body 21 is provided with a plurality of first through holes 211 at one end thereof close to the wellhead in sequence and at intervals along the first direction; the plurality of seating components 22 are arranged in the plurality of first through holes 211 in a one-to-one correspondence, the data ball 40 is detachably fixed in the corresponding seating component 22, and the data ball 40 is connected to the communication module component 30; the plurality of ejection components 23 are arranged in the plurality of seating components 22 in a one-to-one correspondence; the positioning component 24 is connected to the rod body 21, and is used to position the rod body 21 in the initial installation position of the axial slide groove 11; the ejection component 23 can eject the data ball 40 in the corresponding seating component 22 from the ball cavity opening 111 into the central channel 12.

[0049] Furthermore, if 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, a single or four or more seating assemblies 22 and ejection assemblies 23 may be provided according to actual conditions.

[0050] Specifically, Figure 5 As shown, in one embodiment, the seating assembly 22 includes a PCB base 221, a connector 222, a push-pull rod compartment cover 225 and a conducting 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 arranged on the PCB base 221, and the connector 222 is plugged with the data ball 40; the spring ring 231 is sleeved on the data ball 40 to support the data ball 40 and radially position it; the first spring 232 is arranged between the spring ring 231 and the PCB base 221, one end of which is connected to the spring ring 231, and the other end of which is connected to the PCB base 221; the push-pull rod compartment cover 225 is covered on the PCB base 221; the conducting structure 226 is arranged between the push-pull rod compartment cover 225 and the PCB base 221, and is used to conduct the data ball 40 and the communication module assembly 30.

[0051] When the push-pull rod mechanism 20 is installed in the axial slot 11, the data ball 40 contacts the bottom of the axial slot 11, the first spring 232 is compressed, the data ball 40 is plugged into the connector 222, and the conductive structure 226 connects the data ball 40 and the communication module assembly 30. In this way, when the data ball 40 slides to the corresponding ball-taking position with the rod body 21, the data ball 40 does not contact the bottom of the axial slot 11, the first spring 232 applies a restoring force to the spring ring 231, and the spring ring 231 pushes the data ball 40 into the ball cavity opening 111, and the data ball 40 is separated from the connector 222. The data ball 40 enters the central channel 12 through the ball cavity opening 111, so that the salvage tool can salvage it from the well.

[0052] Specifically, Figure 3 As shown, in one embodiment, the conductive structure 226 includes a conductive sheet track 2261 and a conductive sheet 2262. The conductive sheet track 2261 is arranged at the bottom of the push-pull rod compartment cover 225, and the conductive sheet track 2261 is electrically connected to the communication module assembly 30; the conductive sheet 2262 is arranged on an end of the PCB board base 221 away from the connector 222; when the push-pull rod compartment cover 225 is covered on the PCB board base 221, the conductive sheet track 2261 is in contact with the conductive sheet 2262 for conduction.

[0053] Specifically, Figure 3 As shown, in one embodiment, a first sealing groove is provided at the bottom of the push-pull rod compartment cover plate 225, and the 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 plate 225 and the top opening of the first through hole 211. This can effectively prevent external mud from entering the first through hole 211 through the gap between the push-pull rod compartment cover plate 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, Figure 4 As shown, in one embodiment, a second sealing groove is provided on the outer periphery of the first through hole 211 (the second sealing groove is not connected to the central channel 12), and a second sealing ring 228 is installed in the second sealing groove to seal the contact surface between the axial slide groove 11 and the rod body 21. In this way, the sealing of the outer portions at both ends of the first through hole 211 can be ensured, and external mud can be effectively prevented from entering the first through hole 211 through the gaps that may exist at both ends of the first through hole 211 and damaging the data ball 40, thereby ensuring that the data ball 40 can work normally.

[0055] Specifically, Figure 4As shown, in one embodiment, a second through hole 212 is provided on the end of the rod body 21 away from the wellhead, and an excitation pin opening 112 connected to the central channel 12 is also provided in the axial slide groove 11, which is spaced apart from the ball cavity opening 111 in the first direction, and 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 body 21 close to the wellhead, and the other end is connected to the groove side wall of the axial slide groove 11; the first excitation pin 242 is telescopically arranged in the second through hole 212, and partially extends into the excitation pin opening 112; when the rod body 21 slides to the initial installation position, the second spring 241 stretches to generate a pullback force, and under the action of the pullback force, the first excitation pin 242 is clamped in the excitation pin opening 112.

[0056] In the above arrangement, the first excitation pin 242 and the second spring 241 cooperate to clamp the first excitation pin 242 in the ball cavity opening 111, thereby achieving the installation and positioning of the rod body 21 in the axial slot 11, thereby ensuring that the release nipple assembly 100 can work normally.

[0057] Specifically, Figure 4 As shown, in one embodiment, a plurality of third through holes 213 are spaced apart on the rod body 21 , which are located between the second through hole 212 and the first through hole 211 , and a second excitation pin 243 is disposed in each of the third through holes 213 .

[0058] Specifically, Figure 4 As shown, in one embodiment, the number of data balls 40 is three, and the three data balls 40 are arranged at intervals in the push-pull rod mechanism 20. That is, the first data ball is far away from the wellhead relative to the other data balls, the third data ball is close to the wellhead relative to the other data balls, and the second data ball is located between the first data ball and the third data ball. The first data ball, the second data ball and the third data ball correspond to the first ball taking position, the second ball taking position and the third ball taking position, respectively.

[0059] Specifically, Fig. 9 As shown, in one embodiment, when the push-pull rod mechanism 20 slides to the first ball retrieval position corresponding to the first data ball therein, the first excitation pin 242 extends from the excitation pin opening 112 into the central channel 12 and contacts the salvage tool, and at the same time, the second excitation pin 243 adjacent to the first excitation pin 242 is clamped in the excitation pin opening 112.

[0060] In the above arrangement, since the first excitation pin 242 is in contact with the salvage tool, the salvage tool can apply thrust to the first excitation pin 242. This pushes the push-pull rod mechanism 20 to slide in the axial slide 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 to facilitate the salvage of the salvage tool. At this time, the second excitation pin 243 adjacent to the first excitation pin 242 is clamped in the excitation pin opening 112 (due to the limitation of the salvage tool below, the second excitation pin 243 cannot extend into the central channel 12 at this time). In the process of the salvage tool salvaging the first data ball and moving toward the wellhead, the second excitation pin 243 is clamped on the excitation pin opening 112, thereby preventing the rod body 21 from returning to the initial installation position under the pullback force of the second spring 241, and at the same time positioning the rod body 21 for a second time to facilitate the salvage tool to salvage the second data ball next time.

[0061] Specifically, when the salvage tool salvages the first data ball and moves toward the wellhead, when the salvage tool moves to be offset from the second excitation pin 243 clamped in the excitation pin opening 112, the second excitation pin 243 extends into the central channel 12, and the front end of the salvage tool can abut against the second excitation pin 243, and push the second excitation pin 243 toward the bottom of the well to push the push-pull rod mechanism 20 to slide in the axial slot 11 again as shown in the figure. Fig.10 When the push-pull rod mechanism 20 reaches the second ball taking position, another second excitation pin 243 adjacent to the second excitation pin 243 is clamped in the excitation pin opening 112 .

[0062] In the above arrangement, since the second excitation pin 243 is in contact with the salvage tool, the salvage tool can apply thrust to the second excitation pin 243 when salvaging the second data ball for the second time. This pushes the push-pull rod mechanism 20 to slide in the axial slot 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, so as to facilitate the salvage of the salvage tool. Since the other adjacent second excitation pin 243 is clamped in the excitation pin opening 112. In this way, when the salvage tool salvages the second data ball and moves toward the wellhead, the other second excitation pin 243 is clamped on the excitation pin opening 112, thereby preventing the rod body 21 from returning to the initial installation position under the pullback force of the second spring 241, and at the same time positioning the rod body 21 for the third time, so as to facilitate the salvage tool to salvage the third data ball next time.

[0063] Specifically, when the salvage tool salvages the second data ball and moves toward the wellhead, when the salvage tool moves to be offset from the second excitation pin 243 clamped in the excitation pin opening 112, the second excitation pin 243 extends into the central channel 12, and the front end of the salvage tool can abut against the second excitation pin 243, and push the second excitation pin 243 toward the bottom of the well to push the push-pull rod mechanism 20 to slide in the axial slot 11 again as shown in the figure. Fig.11 When the push-pull rod mechanism 20 reaches the third ball taking position, the third second excitation pin 243 adjacent to the second excitation pin 243 is clamped in the excitation pin opening 112 .

[0064] In the above configuration, since the other second excitation pin 243 is in contact with the salvage tool, when the third data ball is salvaged for the third time, the salvage tool can apply thrust to the second excitation pin 243. This pushes the push-pull rod mechanism 20 to slide in the axial slide groove 11 to the third ball-taking position. This ensures that the third data ball can enter the central channel 12 from the ball cavity opening 111, so as to facilitate the salvage of the salvage tool. Since the third second excitation pin 243 is clamped in the excitation pin opening 112. In this way, when the salvage tool salvages the third data ball and moves toward the wellhead, the third second excitation pin 243 is clamped on the excitation pin opening 112, thereby preventing the rod body 21 from returning to the initial installation position under the pullback force of the second spring 241, and at the same time positioning the rod body 21 for the fourth time to ensure that the rod body 21 is fixed in the axial slide groove 11 after all the data balls are taken out, so as to avoid the rod body 21 shaking in the axial slide groove 11 and affecting subsequent operations.

[0065] Specifically, Figure 4 As shown, in one embodiment, the number of the first through holes 211 and the number of the third through holes 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, and the center distance D3 between the second through hole 212 and its adjacent third through hole 213 is equal to the center distance D1. This ensures that the salvage tool can salvage the corresponding data ball at the same fixed position underground each time. That is, the salvage position of the salvage tool for salvaging the first data ball, the second data ball, and the third data ball is the same. This improves the convenience of on-site salvage.

[0066] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, the drill collar 10 is further provided with a communication circuit compartment 13 and a wire hole 14 connected to the communication circuit compartment 13, and the communication module assembly 30 includes a communication circuit board 31 and wires. The communication circuit board 31 is arranged in the communication circuit compartment 13; the wires are passed through the wire hole 14, and the wires are used to conduct the communication circuit board 31 and the data ball 40, and conduct the communication circuit board 31 and the downhole test instrument.

[0067] Specifically, Figure 2 and Figure 3 As shown, in one embodiment, the communication module assembly 30 further includes a communication circuit compartment cover 32 , and the communication circuit compartment cover 32 is sealingly disposed on the communication circuit compartment 13 .

[0068] Specifically, Figure 2 and Figure 3 As shown, in one embodiment, the seating assembly 22 further includes an excitation pin bin cover plate 223 and a spring bin cover plate 224, which are covered on the axial slide slot 11, the excitation pin bin cover plate 223 is located above the second excitation pin 243 of the first excitation pin 242, and the spring bin cover plate 224 is located above the first spring 232. The excitation pin bin cover plate 223, the spring bin cover plate 224 and the push-pull rod bin cover plate 225 form an integral body and are covered on the axial slide slot 11.

[0069] Embodiment 2

[0070] like Figure 6 and Figure 7 As shown, the present invention also provides a salvage tool 200, which is used to salvage the data ball 40 in the above-mentioned release short joint assembly 100, and includes a salvage head 201, a buoy 202, and a salvage spear 203. The salvage head 201 is used to salvage the data ball 40; the buoy 202 is arranged on the salvage head 201; and the salvage spear 203 is arranged on the buoy 202. The salvage tool 200 floats up and detaches from the release short joint assembly 100 by the buoyancy of the buoy 202; the salvage spear 203 can be hooked and connected with an external hook at the wellhead so that the salvage tool 200 can be taken out.

[0071] Specifically, Figure 6 and Figure 7As shown, in one embodiment, the salvage head 201 includes a salvage rod 2011, an upper lip 2012, a lower lip 2013 and a third spring 2014. The salvage rod 2011 is inserted into the buoy 202 and is fixedly connected to the buoy 202; the upper lip 2012 is sleeved on the salvage rod 2011 and is slidably connected to the salvage rod 2011; the lower lip 2013 is arranged at the bottom end of the salvage rod 2011; the third spring 2014 is sleeved on the salvage rod 2011, one end of the third spring 2014 is connected to the buoy 202, and the other end of the third spring 2014 is connected to the upper lip 2012; the guide head 2015 is arranged at one end of the lower lip 2013 away from the upper lip 2012, and the guide head 2015 is arranged at one 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 retrieval position; the salvage tool 200 has an initial state and a ball retrieval state. When the salvage tool 200 is in the initial state, the third spring 2014 presses the upper lip 2012 onto the lower lip 2013, and a fishing cavity 50 for collecting the data ball 40 is defined between the upper lip 2012 and the lower lip 2013; when the salvage tool 200 is in the ball retrieval state, the lower lip 2013 moves in a direction 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 buoy 202 is hollow inside and has a low density, so it can float on the mud. The fishing head 201 is composed 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 the outer diameter 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 is located at the bottom of the salvage tool and is fixed.

[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 fishing cavity that can accommodate multiple data balls at the same time.

[0075] In the ball catching state, the upper lip 2012 is pushed open, and the third spring 2014 is compressed, so that the upper lip 2012 and the lower lip 2013 are separated, and the data ball 40 can enter or leave the catching cavity.

[0076] The following is an explanation of the salvaging principle of the salvage tool in this application:

[0077] The salvage tool enters the water eye of the release short joint assembly 100, and the upper lip is limited outside the core area of ​​the release short joint (in the left area of ​​the reduced diameter shoulder 121 of the central channel 12), while the lower lip of the fishing cavity and the guide head enter the core area of ​​the release short joint (in the right area of ​​the reduced diameter shoulder 121 of the central channel 12, that is, in the reduced diameter hole 122). In this way, the fishing cavity is open, and the data ball enters the fishing cavity from the release short joint in the core area of ​​the release short joint.

[0078] Reference Figure 8 , that is, the guide head has not contacted the first excitation pin. At this time, the guide head is in the large water eye at the left end, and the fishing cavity is closed.

[0079] Reference Fig. 9 , the guide head pushes the first excitation pin to move, and the first excitation pin drives the push-pull rod (rod body 21) to move, and the fishing cavity is open at this time. The first data ball enters the opening position of the ball cavity and is ejected into the water eye and enters the fishing cavity of the salvage tool.

[0080] Reference Fig.10 The guide head pushes the second excitation pin to move, and the second excitation pin drives the push-pull rod to move, and the fishing cavity is open at this time. The second data ball enters the opening position of the ball cavity and is ejected into the water eye and enters the fishing cavity of the salvage tool.

[0081] Reference Fig.11 , the second excitation pin drives the push-pull rod to move, and the fishing cavity is open at this time. The third data ball enters the opening position of the ball cavity and is ejected into the water eye and enters the fishing cavity of the fishing tool.

[0082] Reference Fig.12 , the salvage tool floats up and leaves the core area of ​​the release short section, the capture cavity is closed, and the data ball is firmly confined in the capture cavity, and returns to the ground with the salvage tool (in this application, only one data ball 40 is salvaged each time, and three data balls 40 are salvaged in sequence).

[0083] Embodiment 3

[0084] like Figures 8 to 12 As shown, the present invention further provides a data ball transmission system in a drill string, comprising the above-mentioned release sub assembly 100 and the above-mentioned fishing tool 200 . The fishing tool 200 is used to fish out the data ball 40 in 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 the downhole to the ground by releasing the short joint assembly 100 and the salvage tool 200. The method of downloading data on the ground realizes large-capacity data transmission, which can be used for data transmission of while-drilling imaging logging and data transmission of completion monitoring, and has broad application prospects.

[0086] Embodiment 4

[0087] The present invention also provides a salvage method, which is used to salvage the data ball 40 (reference Fig.13 ), which includes:

[0088] Step S1, it is necessary to obtain geological data and understand the downhole conditions, install the release sub (the above-mentioned release sub assembly) on the downhole measurement tool, and realize data communication;

[0089] Step S2, placing a salvage tool (salvage device) into the wellhead drill pipe;

[0090] Step S3, increasing the pump pressure and using the mud flow to flush the salvage tool (salvage device) into the well;

[0091] Step S4, the salvaging tool (salvage device) enters the interior of the release sub;

[0092] Specifically, the salvage tool enters the water eye of the release short joint assembly, the upper lip is limited outside the core area of ​​the release short joint, the third spring of the salvage tool is compressed, and the lower lip enters the core area of ​​the release short joint, so that the fishing cavity opens. The guide head of the salvage tool touches the data ball ejection mechanism (ejection assembly), and the data ball is ejected out of the release short joint assembly and enters the fishing cavity.

[0093] Step S5, stop the pump, the salvage tool floats up by relying on the buoyancy of the float and begins to detach from the release nipple, the third spring of the salvage tool applies thrust to bite the upper lip and the lower lip of the capture cavity together, and the capture cavity firmly captures the data ball.

[0094] Step S6, the salvage tool floats up along the inner wall of the drill pipe (relying on the buoyancy of the buoy to float up along the drill pipe);

[0095] Step S7, taking out the fishing tool at the wellhead;

[0096] Step S8, taking out the data ball from the salvage tool and playing back the data through the ground reader.

[0097] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present 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 nipple assembly, characterized in that: include: A drill collar (10) having an axial slide groove (11) disposed on its outer periphery; A push-pull rod mechanism (20) slidably disposed in the axial sliding groove (11); A communication module assembly (30), arranged on the drill collar (10), for collecting downhole information; as well as A data ball (40) is arranged in 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 slide groove (11) is provided with a ball cavity opening (111) connected to 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) so that the data ball (40) can be retrieved from the well by a salvage tool.

2. The release nipple assembly according to claim 1, characterized in that: There are a plurality of data balls (40), and the plurality of data balls (40) are arranged at intervals 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).

3. The release nipple assembly according to claim 2, characterized in that: The push-pull rod mechanism (20) comprises: The rod body (21) has a plurality of first through holes (211) arranged at intervals in sequence along a first direction on one end of the rod body (21) close to the wellhead; A plurality of seating components (22) are arranged in a one-to-one correspondence in a plurality of the first through holes (211), the data ball (40) is detachably fixed in the corresponding seating component (22), and the data ball (40) is connected to the communication module component (30); A plurality of ejection assemblies (23) are arranged on the plurality of seating assemblies (22) in a one-to-one correspondence; a positioning assembly (24), connected to the rod body (21), and used for positioning the rod body (21) at an initial installation position of the axial sliding groove (11); The ejection component (23) is capable of ejecting the data ball (40) in the corresponding seating component (22) from the ball cavity opening (111) into the central channel (12).

4. The release nipple assembly according to claim 3, characterized in that: The seating assembly (22) comprises: A PCB board base (221) is fixed at the top opening of the first through hole (211); and A connector (222) is arranged on the PCB base (221), and the connector (222) is plugged into the data ball (40); A push-pull rod compartment cover plate (225), which is covered on the PCB board base (221); A conducting structure (226) is arranged between the push-pull rod compartment cover (225) and the PCB board base (221) and is used to conduct the data ball (40) and the communication module assembly (30).

5. The release nipple assembly according to claim 4, characterized in that: The ejection assembly (23) comprises: a spring ring (231), sleeved on the data ball (40), used to support the data ball (40) and position it radially; and A first spring (232), arranged between the spring ring (231) and the PCB base (221), one end of which is connected to the spring ring (231) and the other end of which is connected to the PCB base (221); When the push-pull rod mechanism (20) is installed in the axial slide groove (11), the data ball (40) contacts the bottom of the axial slide groove (11), the first spring (232) is compressed, the data ball (40) is plugged into the connector (222), and the conductive structure (226) connects the data ball (40) and the communication module assembly (30).

6. The release nipple assembly according to claim 4, characterized in that: The conductive structure (226) comprises: A conductive sheet track (2261) is arranged at the bottom of the push-pull rod compartment cover plate (225), and the conductive sheet track (2261) is electrically connected to the communication module assembly (30); and A conductive sheet (2262) is arranged on an end of the PCB base (221) away from the connector (222); When the push-pull rod compartment cover (225) is covered on the PCB board base (221), the conductive sheet track (2261) is in contact with and conductive to the conductive sheet (2262).

7. The release nipple assembly according to claim 6, characterized in that: A first sealing groove is provided at the bottom of the push-pull rod bin cover plate (225), the conductive sheet track (2261) is located on the inner side of the first sealing groove, and a first sealing ring (227) is installed in the first sealing groove for sealing the gap between the push-pull rod bin cover plate (225) and the top opening of the first through hole (211).

8. The release nipple assembly according to claim 6, characterized in that: A second sealing groove is provided on the outer periphery of the first through hole (211), a second sealing ring (228) is installed in the second sealing groove, and the second sealing ring (228) is used to achieve sealing of the contact surface between the rod body (21) and the axial sliding groove (11).

9. The release nipple assembly according to claim 3, characterized in that: A second through hole (212) is provided at one end of the rod body (21) away from the wellhead, and an excitation pin opening (112) connected to the central channel (12) is also provided in the axial slide groove (11), and is spaced apart from the ball cavity opening (111) in a first direction. The positioning assembly (24) comprises: A second spring (241), one end of which is connected to an end of the rod body (21) close to the wellhead, and the other end of which is connected to the groove side wall of the axial sliding groove (11); and A first excitation pin (242) is telescopically disposed in the second through hole (212) and partially extends into the excitation pin opening (112); When the rod body (21) slides to the initial installation position, the second spring (241) stretches to generate a pull-back force, and under the action of the pull-back force, the first excitation pin (242) is clamped in the excitation pin opening (112).

10. The release nipple assembly according to claim 9, characterized in that: A plurality of third through holes (213) are also arranged 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 excitation pin (243) is arranged in each of the third through holes (213); when the push-pull rod mechanism (20) slides to the ball retrieval position corresponding to the data ball (40) therein, the first excitation pin (242) extends from the excitation pin opening (112) into the central channel (12) to come into contact with the salvage tool, and at the same time, the second excitation pin (243) adjacent to the first excitation pin (242) is clamped in the excitation pin opening (112).

11. The release nipple assembly according to claim 10, characterized in that: The number of the first through holes (211) and the number of the third through holes (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), and the center distance D3 between the second through hole (212) and its adjacent third through hole (213) is equal to the center distance D1.

12. The release nipple assembly according to claim 1, characterized in that: The drill collar (10) is also provided with a communication circuit compartment (13) and a wire hole (14) connected to the communication circuit compartment (13), and the communication module assembly (30) comprises: A communication circuit board (31) is arranged in the communication circuit compartment (13); and An electric wire is passed through the wire hole (14), and is used to conduct electricity between the communication circuit board (31) and the data ball (40), and to conduct electricity between the communication circuit board (31) and a downhole testing instrument.

13. A fishing tool (200), characterized in that: The fishing tool is used to fish out the data ball (40) in the release sub assembly according to any one of claims 1 to 12, and comprises: A salvaging head (201), used for salvaging the data ball (40); A buoy (202) is arranged on the fishing head (201); and A salvage spear (203) is arranged on the buoy (202); The salvage tool (200) floats up by the buoyancy of the float (202) and detaches from the release nipple assembly; the salvage spear (203) can be hooked and connected with an external hook at the wellhead so that the salvage tool (200) can be taken out.

14. The fishing tool (200) according to claim 13, characterized in that: The fishing head (201) comprises: a salvage rod (2011), which is inserted into the buoy (202) and fixedly connected to the buoy (202); and an upper lip (2012) which is sleeved on the salvage rod (2011) and is slidably connected to the salvage rod (2011); and A lower lip (2013) is arranged at the bottom end of the salvage rod (2011); a third spring (2014), which is sleeved on the salvage rod (2011), one end of the third spring (2014) being connected to the buoy (202), and the other end of the third spring (2014) being connected to the upper lip (2012); A guide head (2015) is arranged 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 picking position; The salvage tool (200) has an initial state and a ball catching state. When the salvage tool (200) is in the initial state, the third spring (2014) presses the upper lip (2012) against the lower lip (2013), and a catching cavity (50) for collecting the data ball (40) is defined between the upper lip (2012) and the lower lip (2013). When the salvage tool (200) is in the ball catching state, the lower lip (2013) moves in a direction away from the upper lip (2012), and the data ball (40) is located between the lower lip (2013) and the upper lip (2012).

15. A data ball transmission system in a drill string, characterized in that: It includes: The release nipple assembly according to any one of claims 1 to 12; as well as The fishing tool (200) according to claim 13 or 14; Wherein, the salvage tool (200) is used to salvage the data ball (40) in the release short joint assembly.

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