A downhole data ball retrieval and placement short section assembly and fishing tool

Abstract

The present invention relates to a downhole data ball retrieval and placement subassembly and a salvage tool, and relates to the technical field of downhole large-capacity data transmission while drilling systems. The subassembly comprises a connecting subassembly, an axial sliding mechanism, a downhole data acquisition module, and at least one data ball, wherein an axial sliding groove is provided on the outer periphery of the connecting subassembly, the axial sliding mechanism is slidingly provided in the axial sliding groove along a first direction, the downhole data acquisition module is provided in the connecting subassembly, and at least one data ball is provided in the axial sliding mechanism, which is electrically connected to the downhole data acquisition module and can store downhole data information collected by the downhole data acquisition module. The axial sliding groove is provided with a first opening connected to the water hole of the connecting subassembly. In the present invention, the salvage tool is used to push the axial sliding mechanism to a ball capture position, and the data ball enters the water hole from the axial sliding mechanism through the first opening. This facilitates the salvage tool to salvage the data ball from downhole to the surface, and to replay the data stored therein through a ground reader.

Description

Technical Field

[0001] The present invention relates to the technical field of downhole transmission while drilling systems, in particular to a downhole data ball taking and placing short joint assembly and a fishing tool. Background Art

[0002] With the development of oil and gas exploration and development, a wide range of logging methods are used during drilling to analyze the structure of the strata being drilled, generating a large amount of downhole data. Existing conventional downhole data transmission technology is based on mud pulses. However, due to limitations in transmission distance and external environmental factors, this technology is unable to fully upload large amounts of downhole data to the surface, thus failing to meet the needs of field operations.

[0003] In other words, the existing downhole data transmission technology has the problem of being unable to upload large amounts of downhole data completely to the surface. Summary of the Invention

[0004] The present invention provides a downhole data ball retrieval and placement short joint assembly, which is used to solve the problem that downhole data transmission technology cannot completely upload large-capacity downhole data to the ground.

[0005] The present invention provides a downhole data ball retrieval and placement short section assembly, comprising a connecting short section, an axial sliding mechanism, a downhole data acquisition module and at least one data ball, wherein an axial sliding groove is provided on the outer periphery of the connecting short section along a first direction, the axial sliding mechanism is slidingly provided in the axial sliding groove along the first direction, the downhole data acquisition module is provided in the connecting short section, and is used to collect downhole data information, at least one data ball is provided in the axial sliding mechanism, at least one data ball is electrically connected to the downhole data acquisition module, at least one data ball can store downhole data information collected by the downhole data acquisition module, a first opening connected to a water eye of the connecting short section is provided in the axial sliding groove, and when the axial sliding mechanism slides to the ball capture position, at least one data ball can enter the water eye from the first opening.

[0006] In one embodiment, the downhole data ball retrieval and placement short section assembly includes multiple data balls, each data ball has a corresponding capture ball position in the axial slide groove, and when the axial sliding mechanism slides to the capture ball position, the data ball corresponding to the capture ball position enters the water eye from the first opening.

[0007] In one embodiment, the axial sliding mechanism includes a push rod, multiple fixed components, multiple ejection components and a positioning component, wherein the push rod has multiple first through holes arranged in sequence along the first direction on one end of the push rod close to the wellhead, and multiple fixed components are arranged in the multiple first through holes one by one, and the data ball is detachably fixed in the corresponding fixed component, and the data ball is connected to the downhole data acquisition module; multiple ejection components are arranged on the multiple fixed components one by one, and the positioning component is connected to the push rod and the connecting short section, which is used to position the push rod in the initial installation position of the axial slide groove, and the ejection component can eject the data ball in the corresponding fixed component from the first opening into the water eye.

[0008] In one embodiment, the fixing assembly includes a fixed base and a conducting rod, and the downhole data ball retrieval short section assembly also includes a cover plate, wherein the fixed base is fixed at the top opening of the first through hole, the conducting rod is passed through the fixed base, one end of the conducting rod is plugged into the data ball, and the cover plate is covered on the fixed base, wherein the cover plate is embedded with a downhole data acquisition module. When the cover plate is covered on the fixed base, the downhole data acquisition module is pressed and contacted with the other end of the conducting rod, and the conducting rod connects the downhole data acquisition module with the data ball.

[0009] In one embodiment, a second through hole is provided on the end of the push rod away from the wellhead, and a second opening connected to the water hole is also provided in the axial slide groove, which is spaced apart from the first opening in the first direction. The positioning assembly includes an elastic rope and a first positioning pin, wherein one end of the elastic rope is connected to the end of the push rod close to the wellhead, and the other end thereof is connected to the side wall of the axial slide groove, and the first positioning pin is telescopically arranged in the second through hole and partially extends into the first opening; when the push rod slides to the initial installation position, the elastic rope is stretched to generate a pullback force, and under the action of the pullback force, the first positioning pin is clamped in the second opening.

[0010] In one embodiment, a plurality of third through holes are provided at intervals on the push rod, which are located between the second through hole and the first through hole, and a second positioning pin is provided in each third through hole; when the axial sliding mechanism slides to the capture ball position corresponding to the data ball therein, the first positioning pin extends from the second opening into the water eye and contacts with the salvage tool, so that the salvage tool pushes the axial sliding mechanism to slide, and at the same time, the second positioning pin adjacent to the first positioning pin extends from the second opening into the water eye and presses against the outer peripheral surface of the salvage tool, or the second positioning pin close to the first positioning pin extends from the second opening into the water eye and contacts with the salvage tool, so that the salvage tool pushes the axial sliding mechanism to slide, and at the same time, another second positioning pin adjacent to the second positioning pin extends from the second opening into the water eye and presses against the outer peripheral surface of the salvage tool.

[0011] In one embodiment, the number of the first through holes is equal to the number of the third through holes, and the center distance D1 between two adjacent first through holes is equal to the center distance D2 between two adjacent second through holes and third through holes.

[0012] In one embodiment, the ejection assembly includes a spring ring, a spring and a guide cylinder, wherein the spring ring is sleeved on the data ball, which is used to support the data ball and radially position it; the spring is arranged between the spring ring and the fixed base, one end of which is connected to the spring ring and the other end is connected to the fixed base, the guide cylinder is arranged on the fixed base, the spring and the data ball are located in the guide cylinder, and the guide cylinder is used to guide the extension and contraction of the spring; when the axial sliding mechanism is installed in the axial sliding groove, the data ball contacts the bottom of the axial sliding groove, the spring is compressed, and the data ball is inserted into the conducting rod. At this time, the data ball is connected to the downhole data acquisition module.

[0013] In one embodiment, a first through hole is provided in the cover plate, a second through hole sealedly connected to the first through hole is provided in the connecting short section, the first through hole and the second through hole constitute a wire passing channel, a passing wire is provided in the wire passing channel, one end of the passing wire is electrically connected to the downhole data acquisition module, and the other end thereof is electrically connected to the downhole testing instrument.

[0014] The present invention also provides a salvage tool, which is used to salvage the data ball in the above-mentioned downhole data ball retrieval and placement short joint assembly. The salvage tool includes an inner cylinder assembly, a salvage rod and an outer cylinder, wherein the outer periphery of the inner cylinder assembly is provided with a side notch, the salvage rod is connected to one end of the inner cylinder assembly, the outer cylinder is sleeved on the outer periphery of the inner cylinder assembly and the salvage rod, and is slidably connected to the inner cylinder assembly, the vertical distance D4 between the bottom of the side notch and the inner bottom wall of the inner cylinder assembly is greater than the diameter of the data ball, the data ball enters the inner cylinder assembly through the side notch, and falls to the bottom of the inner cylinder assembly under the action of its own gravity.

[0015] Compared with existing technologies, the present invention offers the advantage of using a salvage tool to push the axial sliding mechanism to its corresponding capture ball position, allowing the data ball to enter the water hole through the first opening from the axial sliding mechanism. This facilitates the subsequent salvage of the data ball from downhole to the surface. The data stored in the data ball can then be replayed using a surface reader. This allows the data ball to be released downhole and, through the channel within the drill string, large amounts of data, such as while-drilling imaging logging, to be fully uploaded to the surface, thus achieving the goal of transmitting large amounts of data downhole and guiding geosteering drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

[0017] Figure 1 This is a front view of a downhole data ball retrieval sub assembly in the first embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Cross-sectional view of the AA section of the data ball removal and placement subassembly downhole;

[0019] Figure 3 This is a front view of a downhole data ball retrieval sub assembly in the second embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Cross-sectional view of the data ball removal and placement subassembly at BB in the middle well;

[0021] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle;

[0022] Figure 6 yes Figure 4 A partial enlarged view of point B in the middle;

[0023] Figure 7 This is a main cross-sectional view of the connecting nipple in the second embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of the cover plate in the second embodiment of the present invention;

[0025] Figure 9 Schematic diagram of the structure of the axial sliding mechanism in the second embodiment of the present invention;

[0026] Figure 10 Schematic diagram of the assembly relationship between the data ball, the ejection assembly, and the fixed assembly in the second embodiment of the present invention;

[0027] Figure 11 is a schematic diagram of the three-dimensional structure of the salvage tool in the third embodiment of the present invention;

[0028] Figure 12 1 is a schematic diagram of a process in which a salvaging tool salvages the first data ball (the salvaging tool is in contact with the first positioning pin);

[0029] Figure 13 Schematic diagram of the process of the salvaging tool salvaging the first data ball (the salvaging tool pushes the axial sliding mechanism to slide to the first capture ball position);

[0030] Figure 14 1 is a schematic diagram of the process of using a salvaging tool to salvage the first data ball (the ejection component ejects the first data ball into the inner tube component);

[0031] Figure 15 1 is a schematic diagram of the process of using a salvaging tool to salvage the second data ball (the salvaging tool is in contact with the second positioning pin);

[0032] Figure 16Schematic diagram of the process of the salvaging tool salvaging the second data ball (the salvaging tool pushes the axial sliding mechanism to slide to the second capture ball position);

[0033] Figure 17 It is a schematic diagram of the process of using the salvage tool to salvage the second data ball (the ejection component ejects the second data ball into the inner tube component).

[0034] Reference numerals:

[0035] 10. Connecting nipple; 11. Axial chute; 111. First opening; 112. Second opening; 12. Water hole; 121. Reduced diameter shoulder; 122. Reduced diameter hole; 18. Second through hole; 21. Push rod; 211. First through hole; 212. Second through hole; 213. Third through hole; 22. Fixing assembly; 221. Fixing base; 227. First sealing ring; 228. Second sealing ring; 229. Conducting rod; 23. Ejection assembly; 231. Spring ring; 232. Spring; 233. Guide cylinder; 24. Positioning assembly; 241. Elastic rope; 242. First positioning pin; 243. Second positioning pin; 30. Downhole data acquisition module; 40. Data ball; 50. Cover plate; 51. First through hole; 100. Downhole data ball removal and placement short section assembly; 200. Salvage tool; 201. Inner cylinder assembly; 2011. Inner cylinder; 2012. Sealing plate; 2013. Side notch; 202. Salvage rod; 203. Outer cylinder. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] like Figures 1 to 10 As shown, the present invention provides a downhole data ball retrieval and placement short section assembly 100, which includes a connecting short section 10, an axial sliding mechanism, a downhole data acquisition module 30 and at least one data ball 40, wherein an axial sliding groove 11 is provided on the outer periphery of the connecting short section 10, the axial sliding mechanism is slidably arranged in the axial sliding groove 11 along a first direction, the downhole data acquisition module 30 is provided in the connecting short section 10, and is used to collect downhole data information, at least one data ball 40 is provided in the axial sliding mechanism, at least one data ball 40 is electrically connected to the downhole data acquisition module 30, and at least one data ball 40 can store the downhole data information collected by the downhole data acquisition module 30, and a first opening 111 is provided in the axial sliding groove 11, which is connected to the water hole 12 of the connecting short section 10; when the axial sliding mechanism slides to the ball capture position, at least one data ball 40 can enter the water hole 12 from the first opening 111.

[0038] Specifically, when the axial sliding mechanism slides to the capture ball position, the data ball 40 enters the water hole 12 through the first opening 111, allowing the salvage tool to retrieve it from the well. The salvage tool then pushes the axial sliding mechanism to its corresponding capture ball position, allowing the data ball 40 to enter the water hole 12 through the first opening 111. This facilitates the salvage tool's subsequent recovery of the data ball 40 from the well to the surface. The data stored in the data ball 40 can then be replayed via a surface reader. This allows the data ball 40 to be released from the well and, through the channel within the drill string, large-capacity data such as while-drilling imaging logging to be fully uploaded to the surface, thus achieving the goal of transmitting large-capacity data downhole and guiding geosteering drilling.

[0039] Example 1

[0040] Specifically, if Figure 1 and Figure 2 As shown, the present invention provides a downhole data ball retrieval subassembly 100, which includes a connecting subassembly 10, an axial sliding mechanism, a downhole data acquisition module 30, and a data ball 40. The connecting subassembly 10 is provided with an axial slot 11 on its outer circumference. The downhole data acquisition module 30 is mounted on the connecting subassembly 10 for collecting downhole data information. The data ball 40 is disposed within the axial sliding mechanism and electrically connected to the downhole data acquisition module 30. The data ball 40 is configured to store downhole data collected by the downhole data acquisition module 30. The axial slot 11 includes a first opening 111 that communicates with the water hole 12 of the connecting subassembly 10. When the axial sliding mechanism slides to the capture ball position, the data ball 40 enters the water hole 12 through the first opening 111, allowing it to be retrieved from the downhole by a salvage tool. The salvage tool then pushes the axial sliding mechanism to its corresponding capture ball position, allowing the single data ball 40 to pass from the axial sliding mechanism into the water hole 12 through the first opening 111. This facilitates the subsequent salvage of the data ball 40 from the wellbore to the surface, and allows the data stored in the data ball 40 to be replayed via a surface reader. This allows the data ball 40 to be released from the wellbore and large amounts of data, such as while-drilling imaging logging, to be uploaded to the surface via the channel within the drill string.

[0041] Specifically, if Figure 1 and Figure 2 As shown, the internal diameter of the connecting short section 10 is reduced, and the water hole at the left end is large. The entire fishing process is carried out in the drill string.

[0042] Specifically, if Figure 2As shown, in one embodiment, the axial sliding mechanism includes a push rod 21, a fixed assembly 22, an ejection assembly 23, and a positioning assembly 24. The push rod 21 has a first through hole 211 spaced along a first direction at one end thereof, which is located near the wellhead. The fixed assembly 22 is correspondingly disposed within the first through hole 211. The data ball 40 is removably secured within the corresponding fixed assembly 22, connecting the data ball 40 to the downhole data acquisition module 30. The ejection assembly 23 is correspondingly disposed within the fixed assembly 22. The positioning assembly 24 is connected to the push rod 21 and is used to position the push rod 21 in the initial installation position of the axial slot 11. The ejection assembly 23 is capable of ejecting the data ball 40 within the corresponding fixed assembly 22 through the first opening 111 into the water hole 12.

[0043] Specifically, if Figure 2 As shown, in one embodiment, the fixing assembly 22 includes a fixing base 221 and a conducting rod 229. The downhole data ball retrieval sub assembly 100 also includes a cover plate 50. The fixing base 221 is fixed to the top opening of the first through hole 211. The conducting rod 229 is inserted into the fixing base 221. One end of the conducting rod 229 is plugged into and engaged with the data ball 40. The cover plate 50 is mounted on the fixing base 221. The downhole data acquisition module 30 is embedded in the cover plate 50. When the cover plate 50 is mounted on the fixing base 221, the downhole data acquisition module 30 is pressed into contact with the other end of the conducting rod 229. The conducting rod 229 connects the downhole data acquisition module 30 to the data ball 40.

[0044] It should be noted that the specific structures of the fixing components in the first and second embodiments of the present application are the same. Figure 2 For unclear points, please refer to Example 2. Figure 5 .

[0045] Specifically, in one embodiment, the ejection assembly 23 includes a spring ring 231, a spring 232 and a guide cylinder 233, wherein the spring ring 231 is sleeved on the data ball 40 to support the data ball 40 and radially position it; the spring 232 is arranged between the spring ring 231 and the fixed base 221, one end of which is connected to the spring ring 231 and the other end of which is connected to the fixed base 221; the guide cylinder 233 is arranged on the fixed base 221, and the spring 232 and the data ball 40 are located in the guide cylinder 233, and the guide cylinder 233 is used to guide the extension and contraction of the spring 232. When the axial sliding mechanism is installed in the axial sliding groove 11, the data ball 40 contacts the bottom of the axial sliding groove 11, the spring 232 is compressed, and the data ball 40 is inserted into the conductive rod 229. At this time, the data ball 40 is conductively connected to the downhole data acquisition module 30 (the specific structures of the ejection assemblies in the first and second embodiments of the present application are the same, and can be referred to). Figure 5 and Figure 10 The ejection assembly in Example 2).

[0046] Specifically, if Figure 2 As shown, in one embodiment, a second through hole 212 is provided at the end of the push rod 21 away from the wellhead. A second opening 112 connected to the water hole 12 is also provided in the axial chute 11. The second opening 112 is spaced apart from the first opening 111 in the first direction. The positioning assembly 24 includes an elastic cord 241 and a first positioning pin 242. One end of the elastic cord 241 is connected to the end of the push rod 21 near the wellhead, and the other end is connected to the side wall of the axial chute 11. The first positioning pin 242 is telescopically disposed in the second through hole 212 and partially extends into the first opening 111. When the push rod 21 slides to the initial installation position, the elastic cord 241 stretches to generate a pullback force. Under the action of the pullback force, the first positioning pin 242 is clamped in the first opening 111.

[0047] It should be noted that the cooperation between the first positioning pin 242 and the elastic cord 241 allows the first positioning pin 242 to be clamped in the first opening 111, thereby achieving the installation and positioning of the push rod 21 in the axial slot 11, thereby ensuring that the downhole data ball retrieval sub assembly 100 can function properly.

[0048] Specifically, if Figure 2 As shown, in one embodiment, a single third through hole 213 is further provided on the push rod 21 at intervals, which is located between the second through hole 212 and the first through hole 211 , and a second positioning pin 243 is provided in the third through hole 213 .

[0049] Specifically, in one embodiment, a first positioning pin 242 extends from the second opening 112 into the water hole 12 and contacts the end of the salvage tool. When the axial sliding mechanism slides to the capture ball position corresponding to the single data ball, a second positioning pin 243 adjacent to the first positioning pin 242 extends from the second opening 112 into the water hole 12 and presses against the outer peripheral surface of the salvage tool. At this point, the second positioning pin 243 has a limiting function. The elastic cord 241 is stretched to generate a pullback force, which causes the second positioning pin 243 to be clamped within the second opening 112. This prevents the push rod 21 from returning to its initial installation position due to the pullback force of the elastic cord 241, ensuring that the push rod 21 is fixed within the axial slot 11 after the data ball is removed, and preventing the push rod 21 from shaking within the axial slot 11 and affecting subsequent operations.

[0050] Specifically, if Figure 2 As shown, in one embodiment, a first sealing ring groove is provided on the outer periphery of the cover plate 50 , and a first sealing ring 227 is installed in the first sealing ring groove for sealing the gap between the cover plate 50 and the top opening of the axial sliding groove 11 .

[0051] Specifically, if Figure 2As shown, in one embodiment, a second sealing ring groove is provided on the outer periphery of the first through hole 211. The second sealing ring groove is connected to the water hole 12. A second sealing ring 228 is installed in the second sealing ring groove to seal the gap between the bottom of the axial groove 11 and the bottom opening of the first through hole 211. This effectively prevents external mud from entering the first through hole 211 through this gap and damaging the data ball 40, thereby ensuring that the data ball 40 can function properly.

[0052] Specifically, if Figure 2 As shown, in one embodiment, a first through hole 51 is provided in the cover plate 50, and a second through hole 18 sealedly connected to the first through hole 51 is provided in the connecting short section 10. The first through hole 51 and the second through hole 18 form a wire passing channel, and a passing wire is provided in the wire passing channel. One end of the passing wire is electrically connected to the downhole data acquisition module 30, and the other end thereof is electrically connected to the downhole testing instrument.

[0053] Example 2

[0054] Specifically, if Figure 3 and Figure 4 As shown, the present invention provides a downhole data ball retrieval subassembly 100, which includes a connecting subassembly 10, an axial sliding mechanism, a downhole data acquisition module 30, and multiple data balls 40. The connecting subassembly 10 has an axial slot 11 disposed on its outer periphery. The downhole data acquisition module 30 is mounted on the connecting subassembly 10 for collecting downhole data information. The data balls 40 are disposed within the axial sliding mechanism and are electrically connected to the downhole data acquisition module 30 for storing the downhole data information collected by the downhole data acquisition module 30. A first opening 111 is disposed within the axial slot 11, which communicates with the water hole 12 of the connecting subassembly 10.

[0055] Specifically, if Figure 4 and Figure 5 As shown, in one embodiment, the number of data balls 40 is two, and the two data balls 40 are arranged at intervals in the axial sliding mechanism. Each data ball 40 is correspondingly provided with a capture ball position in the axial sliding groove 11. When the axial sliding mechanism slides to the capture ball position, the data ball 40 corresponding to the capture ball position enters the water eye 12 from the first opening 111.

[0056] It should be noted that by deploying multiple data balls 40, complete downhole data can be collected, ensuring that the data transmitted back to the surface can better guide geosteering drilling. Furthermore, by using a fishing tool to retrieve one data ball 40 at a time, multiple data balls 40 are retrieved sequentially, and the data stored in the data balls 40 is replayed sequentially through a surface reader. This improves the reliability and accuracy of data reading.

[0057] Of course, three, four, or more than four data balls 40 can be provided according to actual conditions.

[0058] Specifically, if Figures 4 to 6 As shown, in one embodiment, the axial sliding mechanism includes a push rod 21, multiple fixed assemblies 22, multiple ejection assemblies 23, and a positioning assembly 24. The push rod 21 has multiple first through holes 211 spaced sequentially along a first direction at one end near the wellhead. The multiple fixed assemblies 22 are disposed within the multiple first through holes 211 in a one-to-one correspondence. The data balls 40 are removably secured within corresponding fixed assemblies 22, connecting the data balls 40 to the downhole data acquisition module 30. The multiple ejection assemblies 23 are disposed within the multiple fixed assemblies 22 in a one-to-one correspondence. The positioning assembly 24 is connected to the push rod 21 and the sidewalls of the axial slot 11 to position the push rod 21 in its initial installation position within the axial slot 11. The ejection assemblies 23 are capable of ejecting the data balls 40 within the corresponding fixed assemblies 22 through the first opening 111 into the water well 12.

[0059] Furthermore, if Figures 4 to 6 As shown, in one embodiment, the axial sliding mechanism includes two fixing assemblies 22 and two ejection assemblies 23 .

[0060] Specifically, if Figure 4 As shown, in one embodiment, a first sealing ring groove is provided on the outer periphery of the cover plate 50 , and a first sealing ring 227 is installed in the first sealing ring groove for sealing the gap between the cover plate 50 and the top opening of the axial sliding groove 11 .

[0061] Specifically, if Figure 4 and Figure 5 As shown, in one embodiment, a second sealing ring groove is provided on the outer periphery of the first through hole 211. The second sealing ring groove is connected to the water hole 12. A second sealing ring 228 is installed in the second sealing ring groove to seal the gap between the bottom of the axial groove 11 and the bottom opening of the first through hole 211. This effectively prevents external mud from entering the first through hole 211 through this gap and damaging the data ball 40, thereby ensuring that the data ball 40 can function properly.

[0062] Specifically, if Figure 10As shown, in one embodiment, the ejection assembly 23 includes a spring ring 231, a spring 232, and a guide cylinder 233. The spring ring 231 is mounted on the data ball 40 to support and radially position the data ball 40. The spring 232 is disposed between the spring ring 231 and the fixed base 221, with one end connected to the spring ring 231 and the other end connected to the fixed base 221. The guide cylinder 233 is disposed on the fixed base 221, and the spring 232 and the data ball 40 are located within the guide cylinder 233. The guide cylinder 233 guides the spring 232 to extend and retract. When the axial sliding mechanism is installed in the axial slot 11, the data ball 40 contacts the bottom of the axial slot 11, compressing the spring 232 and inserting the data ball 40 into the conductive rod 229. At this time, the data ball 40 is electrically connected to the downhole data acquisition module 30.

[0063] Specifically, if Figures 4 to 6 As shown, in one embodiment, a second through hole 212 is provided at the end of the push rod 21 away from the wellhead, and a second opening 112 connected to the water hole 12 is further provided in the axial slide 11. The second opening 112 is spaced apart from the first opening 111 in the first direction. The positioning assembly 24 includes an elastic cord 241 and a first positioning pin 242. One end of the elastic cord 241 is connected to the end of the push rod 21 near the wellhead, and the other end is connected to the groove side wall of the axial slide 11; the first positioning pin 242 is telescopically arranged in the second through hole 212 and partially extends into the first opening 111; when the push rod 21 slides to the initial installation position, the elastic cord 241 stretches to generate a pullback force. Under the action of the pullback force, the first positioning pin 242 is clamped in the first opening 111.

[0064] It should be noted that the cooperation between the first positioning pin 242 and the elastic cord 241 allows the first positioning pin 242 to be clamped in the first opening 111, thereby achieving the installation and positioning of the push rod 21 in the axial slot 11, thereby ensuring that the downhole data ball retrieval sub assembly 100 can function properly.

[0065] Specifically, if Figure 9 As shown, in one embodiment, a plurality of third through holes 213 are spaced apart on the push rod 21 , which are located between the second through hole 212 and the first through hole 211 , and a second positioning pin 243 is disposed in each third through hole 213 .

[0066] Specifically, if Figure 4 As shown, in one embodiment, there are two data balls 40, spaced apart within the axial sliding mechanism. Specifically, the first data ball is positioned farther from the wellhead than the second data ball, while the second data ball is positioned closer to the wellhead than the first data ball. The first and second data balls correspond to first and second capture ball positions, respectively.

[0067] Specifically, if Figure 14 As shown, in one embodiment, the first positioning pin 242 extends from the second opening 112 into the water eye 12 and contacts the end of the salvage tool 200. When the axial sliding mechanism slides to the first capture ball position corresponding to the first data ball therein, the second positioning pin 243 adjacent to the first positioning pin 242 extends from the second opening 112 into the water eye 12 and presses against the outer peripheral surface of the salvage tool 200.

[0068] It should be noted that because the first positioning pin 242 contacts the end of the salvage tool, the salvage tool 200 can apply a thrust to the first positioning pin 242. This forces the axial sliding mechanism to slide within the axial slot 11 to the first capture ball position. This ensures that the first data ball can enter the water hole 12 through the first opening 111, facilitating salvage by the salvage tool 200. Because the second positioning pin 243, adjacent to the first positioning pin 242, extends from the second opening 112 into the water hole 12 and presses against the outer circumference of the salvage tool 200, as the salvage tool 200 salvages the first data ball and moves toward the wellhead, the second positioning pin 243 becomes stuck in the second opening 112, preventing the push rod 21 from returning to its initial installation position under the pullback force of the elastic cord 241. This simultaneously positions the push rod 21 a second time, facilitating the next salvage of the second data ball by the salvage tool 200.

[0069] It should be noted that when the fishing tool 200 is removed from the connecting nipple 10, the second positioning pin 243 adjacent to the first positioning pin 242 is completely extended from the second opening 112 into the water hole 12. When the fishing tool 200 fishes the second data ball again, the second positioning pin 243 contacts the end of the fishing tool 200, thereby achieving a second positioning of the push rod 21 (refer to FIG. Figure 15 ).

[0070] Specifically, if Figure 16 As shown, in one embodiment, a second positioning pin 243 adjacent to the first positioning pin 242 extends from the second opening 112 into the water hole 12 to come into contact with the end of the fishing tool.

[0071] like Figure 17 As shown, when the axial sliding mechanism slides to the second capture ball position corresponding to the second data ball therein, another second positioning pin 243 adjacent to the second positioning pin 243 extends from the second opening 112 into the water hole 12 and presses against the outer peripheral surface of the salvage tool.

[0072] It should be noted that because the second locating pin 243 contacts the end of the salvage tool 200, the salvage tool 200 can apply a thrust to the second locating pin 243 when salvaging the second data ball for the second time. This forces the axial sliding mechanism to slide within the axial slot 11 to the second capture ball position. This ensures that the second data ball can enter the water hole 12 through the first opening 111, facilitating salvage by the salvage tool 200. Because the adjacent second locating pin 243 extends from the second opening 112 into the water hole 12 and presses against the outer circumference of the salvage tool, as the salvage tool salvages the second data ball and moves toward the wellhead, the second locating pin 243 is stuck in the second opening 112, preventing the push rod 21 from returning to its original installation position under the pullback force of the elastic cord 241. This ensures that the push rod 21 is fixed within the axial slot 11 after all data balls have been removed, preventing the push rod 21 from wobbling within the axial slot 11 and affecting subsequent operations.

[0073] Specifically, if Figure 4 As shown, in one embodiment, the number of the first through holes 211 is equal to the number of the third through holes 211. The center distance D1 between two adjacent first through holes 211 is greater than the center distance D2 between adjacent second through holes and third through holes.

[0074] In an alternative embodiment not shown in the drawings of this application, the center-to-center distance D1 between two adjacent first through-holes 211 is equal to the center-to-center distance D2 between adjacent second and third through-holes. This ensures that the salvage tool can salvage the corresponding data ball 40 at the same depth each time it is lowered into the well. That is, the salvage tool salvages the first and second data balls at the same location. This improves the convenience of field use of the salvage tool 200.

[0075] Specifically, if Figure 4 and Figure 6 as well as Figure 8 As shown, in one embodiment, a first through hole 51 is provided in the cover plate 50, and a second through hole 18 sealedly connected to the first through hole 51 is provided in the connecting short section 10. The first through hole 51 and the second through hole 18 form a wire passing channel, and a passing wire is provided in the wire passing channel. One end of the passing wire is electrically connected to the downhole data acquisition module 30, and the other end thereof is electrically connected to the downhole testing instrument.

[0076] It should be noted that the structures of the first locating pin 242 and the second locating pin 243 in the first and second embodiments of the present application are the same. They include a pin shaft, a pressure cover, and a compression spring, and the pin shaft is telescopically arranged in the second through hole or the third through hole. The pressure cover is fixed at the upper opening of the second through hole or the third through hole, and the compression spring is located between the pin shaft and the pressure cover and is fixedly connected to the two. The first locating pin 242 and the second locating pin 243 have a retracted state and an extended state. In the retracted state, the pin shaft is located in the second through hole or the third through hole, and the compression spring is compressed. In the extended state, under the action of the restoring force of the compression spring, the pin shaft extends from the lower opening of the second through hole or the third through hole into the water hole 12.

[0077] It should be noted that the specific structures of the fixing assembly, ejection assembly and positioning assembly, downhole data acquisition module and downhole data acquisition module in the second embodiment of the present application are the same as those in the first embodiment.

[0078] Example 3

[0079] like Figure 11 As shown, the present invention also provides a salvage tool 200 for salvaging the data ball 40 in the downhole data ball retrieval subassembly 100. The salvage tool 200 comprises an inner barrel assembly 201, a salvage rod 202, and an outer barrel 203. The outer circumference of the inner barrel assembly 201 is provided with a side-opening notch 2013. The salvage rod 202 is connected to one end of the inner barrel assembly 201. The outer barrel 203 is sleeved over the outer circumference of the inner barrel assembly 201 and the salvage rod 202 and is slidably connected to the inner barrel assembly 201. The vertical distance D4 between the bottom of the side-opening notch and the inner bottom wall of the inner barrel assembly 201 is greater than the diameter of the data ball 40. The data ball 40 enters the inner barrel assembly 201 through the side-opening notch 2013 and falls to the bottom of the inner barrel assembly 201 under the action of its own gravity.

[0080] It should be noted that the vertical distance D4 between the side notch 2013 and the inner bottom wall of the inner cylinder assembly 201 is greater than the diameter of the data ball 40. This ensures that the data ball 40 will not fall out of the inner cylinder assembly 201 through the side notch 2013 when the salvage tool 200 is lifted.

[0081] Specifically, if Figure 11 As shown, in one embodiment, the inner cylinder assembly 201 includes an inner cylinder 2011 and sealing plates 2012 arranged at both ends of the inner cylinder 2011. Among them, the side opening 2013 is opened on the outer circumference of the inner cylinder 2011.

[0082] The following combination Figures 1 to 17 Explain the salvaging principle of the salvage tool in this application:

[0083] The salvage tool enters the water eye of the downhole data ball retrieval and placement pup joint assembly. The outer cylinder is limited outside the salvage area of ​​the connecting pup joint (within the left area of ​​the reduced diameter shoulder 121 of the water eye 12), and the inner cylinder assembly enters the salvage area of ​​the connecting pup joint (within the right area of ​​the reduced diameter shoulder 121 of the water eye 12, that is, within the reduced diameter hole 122). The data ball in the salvage area of ​​the connecting pup joint enters the inner cylinder assembly from the side opening and then falls to the bottom of the inner cylinder assembly.

[0084] First, the inner cylinder assembly does not contact the first positioning pin, and at this time the inner cylinder assembly is in the large water hole at the left end.

[0085] Next, the inner cylinder assembly pushes the first positioning pin, which in turn moves the push rod. The side opening is now positioned below the first data ball, corresponding to the first opening. The first data ball enters the first opening and is ejected into the water hole and into the salvage tool (the first trip of the salvage tool retrieves the first data ball).

[0086] The inner cylinder assembly then pushes the second positioning pin, which in turn moves the push rod. The side opening is now positioned below the second data ball, aligned with the first opening. The second data ball enters the first opening and is ejected into the water hole and into the salvage tool (a second trip of the salvage tool is performed to retrieve the second data ball).

[0087] It should be noted that in this application, only one data ball 40 is salvaged each time, and the salvaging tool is sent in two times to salvage the first data ball and the second data ball in sequence.

[0088] Of course, two data balls 40 may be salvaged at the same time according to actual conditions.

[0089] Example 4

[0090] The present invention further provides a salvage method, which uses the above-mentioned salvage tool to salvage the two data balls 40 in the downhole data ball retrieval sub assembly of the above-mentioned embodiment 2, and includes the following steps:

[0091] Step 1: Take out the first data ball (refer to Figures 12 to 14 );

[0092] The first step is to obtain geological data and understand the well conditions, install the downhole data ball pick-up and placement sub assembly on the downhole measurement tool, and realize data communication;

[0093] The second step is to place the fishing tool inside the drill pipe at the wellhead;

[0094] The third step is to press down the fishing rod to send the fishing tool into the well;

[0095] Step 4: Rotate the fishing rod so that the side notch of the inner tube assembly faces the axial groove;

[0096] Step 5: The downhole data ball takes the short section assembly and puts it into the connecting section;

[0097] Specifically, the salvage tool enters the water hole of the downhole data ball retrieval subassembly. The outer barrel is positioned outside the salvage area of ​​the connection sub, while the inner barrel assembly enters the salvage area of ​​the connection sub. The inner barrel assembly triggers the ejection assembly corresponding to the first data ball, ejecting the first data ball out of the downhole data ball retrieval subassembly and into the bottom of the inner barrel assembly.

[0098] Step 6: Lift the salvage rod to retract the inner tube assembly into the outer tube.

[0099] Step 7: Continue to lift the fishing rod until the fishing tool can be taken out at the wellhead;

[0100] Step 8: Take out the first data ball from the salvage tool and replay the data through the ground reader.

[0101] Step 2: Take out the second data ball (refer to Figures 15 to 17 );

[0102] The first step is to place the fishing tool inside the drill pipe at the wellhead;

[0103] The second step is to press down the fishing rod to send the fishing tool into the well;

[0104] The third step is to rotate the fishing rod so that the side notch of the inner tube assembly faces the axial groove;

[0105] Step 4: The downhole data ball takes the short section assembly and puts it into the connecting section;

[0106] Specifically, the salvage tool enters the water hole of the downhole data ball retrieval subassembly. The outer barrel is positioned outside the salvage area of ​​the connection sub, while the inner barrel assembly enters the salvage area of ​​the connection sub. The inner barrel assembly triggers the ejection assembly corresponding to the second data ball, ejecting the second data ball out of the downhole data ball retrieval subassembly and into the bottom of the inner barrel assembly.

[0107] Step 5: Lift the salvage rod to retract the inner tube assembly into the outer tube.

[0108] Step 6: Continue to lift the fishing rod until the fishing tool can be taken out at the wellhead;

[0109] Step 7: Take out the second data ball from the salvage tool and replay the data through the ground reader.

[0110] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A downhole data ball pick-up and placement subassembly, characterized in that: The invention comprises a connecting short section, an axial sliding mechanism, a downhole data acquisition module and a data ball, wherein an axial sliding groove is provided on the outer periphery of the connecting short section along a first direction, the axial sliding mechanism is slidably provided in the axial sliding groove along the first direction, the downhole data acquisition module is provided in the connecting short section and is used to collect downhole data information, the data ball is provided in the axial sliding mechanism, the data ball is electrically connected to the downhole data acquisition module, and the data ball can store the downhole data information collected by the downhole data acquisition module, a first opening is provided in the axial sliding groove which is connected to the water eye of the connecting short section, and when the axial sliding mechanism slides to the capture ball position, the data ball can enter the water eye from the first opening; The downhole data ball retrieval subassembly includes a plurality of data balls, which are spaced apart in the axial sliding mechanism. Each data ball is provided with a corresponding capture ball position in the axial sliding groove. When the axial sliding mechanism slides to the capture ball position, the data ball corresponding to the capture ball position enters the water hole from the first opening. The axial sliding mechanism includes a push rod, a plurality of fixing assemblies, a plurality of ejection assemblies and a positioning assembly, wherein the push rod is provided with a plurality of first through holes at intervals in a first direction on one end thereof close to the wellhead, the plurality of fixing assemblies are arranged in the plurality of first through holes in a one-to-one correspondence, the data ball is detachably fixed in the corresponding fixing assemblies, and the data ball is connected to the downhole data acquisition module, the plurality of ejection assemblies are arranged in a one-to-one correspondence on the plurality of fixing assemblies, the positioning assembly is connected to the push rod and the connecting short section, and is used to position the push rod at the initial installation position of the axial slide groove, and the ejection assembly can eject the data ball in the corresponding fixing assembly from the first opening into the water hole; The fixing assembly includes a fixing base and a conducting rod, and the downhole data ball retrieval short section assembly also includes a cover plate, wherein the fixing base is fixed at the top opening of the first through hole, the conducting rod is passed through the fixing base, one end of the conducting rod is plugged into and matched with the data ball, the cover plate is covered on the fixing base, and the downhole data acquisition module is embedded in the cover plate. When the cover plate is covered on the fixing base, the downhole data acquisition module is pressed and contacted with the other end of the conducting rod, and the conducting rod connects the downhole data acquisition module with the data ball.

2. The downhole data ball retrieval sub assembly according to claim 1, characterized in that: A second through hole is provided on the end of the push rod away from the wellhead, and a second opening connected to the water eye is also provided in the axial slide groove, which is spaced apart from the first opening in the first direction. The positioning assembly includes an elastic rope and a first positioning pin, wherein one end of the elastic rope is connected to the end of the push rod close to the wellhead, and the other end is connected to the groove side wall of the axial slide groove, and the first positioning pin is telescopically arranged in the second through hole and partially extends into the first opening. When the push rod slides to the initial installation position, the elastic rope is stretched to generate a pullback force. Under the action of the pullback force, the first positioning pin is clamped in the second opening.

3. The downhole data ball retrieval sub assembly according to claim 2, characterized in that: The push rod is also provided with a plurality of third through holes at intervals, which are located between the second through hole and the first through hole, and a second positioning pin is provided in each of the third through holes, and the first positioning pin extends from the second opening into the water eye and contacts with the salvage tool, so that the salvage tool pushes the axial sliding mechanism to slide, and when the axial sliding mechanism slides to the capture ball position corresponding to the data ball therein, the second positioning pin adjacent to the first positioning pin extends from the second opening into the water eye and presses against the outer peripheral surface of the salvage tool, or the second positioning pin close to the first positioning pin extends from the second opening into the water eye and contacts with the salvage tool, so that the salvage tool pushes the axial sliding mechanism to slide, and when the axial sliding mechanism slides to the capture ball position corresponding to the data ball therein, another second positioning pin adjacent to the second positioning pin extends from the second opening into the water eye and presses against the outer peripheral surface of the salvage tool.

4. The downhole data ball retrieval sub assembly according to claim 3, characterized in that: The number of the first through holes is equal to the number of the third through holes, and the center distance D1 between two adjacent first through holes is equal to the center distance D2 between two adjacent second through holes and the third through hole.

5. The downhole data ball retrieval sub assembly according to claim 1, characterized in that: The ejection assembly includes a spring ring, a spring and a guide cylinder, wherein the spring ring is sleeved on the data ball, and is used to support the data ball and radially position it. The spring is arranged between the spring ring and the fixed base, one end of which is connected to the spring ring, and the other end of which is connected to the fixed base. The guide cylinder is arranged on the fixed base, and the spring and the data ball are located in the guide cylinder. The guide cylinder is used for telescopic guidance of the spring. When the axial sliding mechanism is installed in the axial sliding groove, the data ball contacts the bottom of the axial sliding groove, the spring is compressed, and the data ball is inserted into the conducting rod. At this time, the data ball is connected to the downhole data acquisition module.

6. The downhole data ball retrieval sub assembly according to claim 1, characterized in that: A first through hole is provided in the cover plate, a second through hole sealedly connected to the first through hole is provided in the connecting short section, the first through hole and the second through hole form a wire passing channel, a passing wire is provided in the wire passing channel, one end of the passing wire is electrically connected to the downhole data acquisition module, and the other end thereof is electrically connected to the downhole testing instrument.

7. A salvage tool, characterized in that: The salvage tool is used to salvage a data ball in a downhole data ball retrieval and placement subassembly according to any one of claims 1 to 6, and comprises an inner barrel assembly, a salvage rod, and an outer barrel, wherein the outer circumference of the inner barrel assembly is provided with a side notch, the salvage rod is connected to one end of the inner barrel assembly, the outer barrel is sleeved on the outer circumference of the inner barrel assembly and the salvage rod, and is slidably connected to the inner barrel assembly, a vertical distance D4 between the bottom of the side notch and the inner bottom wall of the inner barrel assembly is greater than the diameter of the data ball, the data ball enters the inner barrel assembly through the side notch, and falls to the bottom of the inner barrel assembly under the action of its own gravity.

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