Intelligent well completion floating casing installation device

Abstract

This invention relates to the field of downhole operation technology and is an intelligent floating casing installation device for well completion. It includes an outer mandrel, an inner sliding sleeve, shear pin assemblies, positioning steel balls, a measuring module, and a lower connector. An outer ring platform is located on the outer side of the middle portion of the outer mandrel, with at least two vertically penetrating cable grooves spaced along the upper side of the outer ring platform. The inner sliding sleeve is located inside the outer mandrel and is cylindrical with an upward-opening shape. At least two connecting holes are spaced along the lower outer side of the inner sliding sleeve, and an installation ring platform is located on the upper outer side of the inner sliding sleeve. The installation ring platform is fixedly installed to the outer mandrel by at least two shear pin assemblies, and has an installation cavity within it. This invention has a reasonable and compact structure, is easy to use, and, by incorporating a measuring module, can monitor the temperature and pressure of the bottom hole fluid during well completion and production. By installing cables within the cable grooves, bidirectional data transmission is achieved, enabling the integration of an intelligent well completion system. It is reliable, efficient, and intelligent.

Description

Technical Field

[0001] This invention relates to the field of downhole operation technology and is an intelligent floating casing running device for well completion. Background Technology

[0002] Automated and intelligent drilling and completion have become the development trend of the oil and gas industry. To achieve closed-loop control and intelligent decision-making in well completion, it is necessary to develop intelligent downhole tools for well completion that can monitor downhole fluids. In addition, with the continuous development of oil and gas fields, horizontal wells and extended reach wells are gradually increasing. For example, in the Jimsar Shale Oil Block of Xinjiang Oilfield, the number of horizontal wells with a depth of more than 1000m has been increasing year by year. The high friction of long horizontal sections and the difficulty in running casing are technical problems that have plagued well completion. A large number of studies and experiments at home and abroad have proved that floating casing technology is one of the more effective technical measures to solve the above difficulties.

[0003] Currently, several oilfield service companies have developed intelligent completion systems and supporting intelligent completion tools, including intelligent completion strings. For example, Weatherford has developed a downhole dynamic monitoring system containing electronic silicon insulating gauges, optical sensors, and quartz pressure gauges. This system can monitor downhole pressure, heat, flow rate, and seismic activity, and can also avoid well workover operations, improving reservoir management. Schlumberger's fluid control system is equipped with real-time fiber optic telemetry and heat transfer flow measurement. Schlumberger also uses inductive couplers to wirelessly transmit data between the downhole and surface, enabling permanent monitoring of downhole conditions. Each layer has integrated monitoring and control components to identify the production characteristics of different layers in each well. These companies have all made investments in intelligent completion systems.

[0004] In recent years, patent searches in my country have yielded no results for intelligent well completion tools with downhole fluid monitoring and data transmission capabilities. Furthermore, to address the challenges of high friction and difficult casing installation in extended reach horizontal wells, current methods employ floating or rotating casing installation. These tools are functionally limited, only providing the basic functions of floating or rotating casing during well completion, lacking downhole fluid monitoring and data transmission capabilities, and thus failing to meet the technological demands of future intelligent drilling and completion systems. Therefore, it is necessary to accelerate the development of supporting tools for intelligent drilling and completion systems to meet the needs of future intelligent drilling and completion development, while also resolving current technical challenges in the well completion process. Summary of the Invention

[0005] This invention provides an intelligent floating casing device for well completion, which overcomes the shortcomings of the prior art. It can effectively solve the problem that the floating casing in the existing well completion process does not have bottom hole fluid monitoring, and can further solve the problem that the floating casing in the existing well completion process does not have data transmission function.

[0006] The technical solution of this invention is achieved through the following measures: A smart well completion floating casing device includes an outer mandrel, an inner sliding sleeve, a shearing pin assembly, a positioning steel ball, a measuring module, and a lower connector. An outer ring platform is provided on the outer side of the middle portion of the outer mandrel, and at least two vertically penetrating wiring grooves are provided at intervals along the circumference on the upper side of the outer ring platform. An inner sliding sleeve is provided inside the outer mandrel, and the inner sliding sleeve is a cylindrical shape with an upward opening. At least two connecting holes are provided at intervals along the circumference on the lower outer side of the inner sliding sleeve. An mounting ring platform is provided on the upper outer side of the inner sliding sleeve, and the mounting ring platform is fixed to the outer mandrel by at least two shearing pin assemblies. The components are installed together. The mounting ring platform has a mounting cavity inside, which contains a measuring module that can monitor the temperature and pressure of the fluid at the bottom of the well. The upper side of the mounting ring platform has a conduction hole that can communicate with the mounting cavity. The lower outer side of the inner sliding sleeve has a lower connector with its lower end located below it. The lower inner side of the lower connector has an enlarged diameter annular groove. The upper outer side of the lower connector has at least two mounting holes spaced along the circumference. The mounting holes contain positioning steel balls. The inner side of the mandrel corresponding to the position of the mounting hole has an inner hemispherical groove. The outer side of the middle part of the inner sliding sleeve corresponding to the position above the mounting hole has an outer hemispherical groove.

[0007] The following are further optimizations and / or improvements to the above-mentioned technical solution:

[0008] The aforementioned measurement module may include a measurement housing, a lower end cover, a sealing plug, a temperature-sensing sleeve, a pressure-sensing sleeve, a matching sleeve, a temperature-sensing optical fiber, a pressure-sensing optical fiber, and a reference optical fiber. The measurement housing has a downward-facing mounting cavity, a liquid inlet on the upper side of the measurement housing, and a sealing plug on the inner side of the middle of the measurement housing. The mounting cavity above the sealing plug is a liquid cavity. A lower end cover is fixedly installed on the inner side of the lower end of the measurement housing. The sealing plug on the inner side of the middle of the measurement housing has three first mounting holes. The lower end cover corresponding to the positions of the first mounting holes has a second mounting hole. The temperature-sensing sleeve, pressure-sensing sleeve, and matching sleeve, with their upper ends located in the liquid cavity, are respectively installed in the three first mounting holes. The temperature-sensing sleeve, pressure-sensing sleeve, and matching sleeve, with their upper ends located in the liquid cavity, are respectively installed in the temperature-sensing sleeve, pressure-sensing sleeve, and matching sleeve. The lower ends of the temperature-sensing optical fiber, pressure-sensing optical fiber, and reference optical fiber pass through the corresponding second mounting holes.

[0009] The aforementioned measurement module may also include a straightening support cylinder. The temperature sensing sleeve, pressure sensing sleeve, and matching sleeve are all provided with a straightening support cylinder on the outer side of their middle parts. The upper end of the straightening support cylinder is located above the sealing plug, and the lower end of the straightening support cylinder is located below the sealing plug.

[0010] The upper part of the aforementioned outer ring platform can be a frustum shape with a smaller top and a larger bottom, while the lower part of the outer ring platform can be a frustum shape with a larger top and a smaller bottom.

[0011] The above may also include cables and spiral heads, with at least two cables provided in the cable tray, and spiral heads provided at both ends of the cables.

[0012] The aforementioned shear pin assembly may include shear pins and springs. The mounting ring is fixedly mounted to the outer mandrel by at least two shear pins, and a spring is provided between the inner end of the shear pin and the mounting ring.

[0013] The upper end of the inner sliding sleeve can be a rubber stopper seat, and the lower end of the inner sliding sleeve can be a hemispherical bottom.

[0014] This invention features a reasonable and compact structure, is easy to use, and can monitor the temperature and pressure of the bottom hole fluid during well completion and production by setting a measurement module. It enables bidirectional data transmission through cables installed in the cable trays, achieving integration with an intelligent well completion system. By setting connecting holes and enlarged-diameter annular grooves, a cement slurry circulation channel can be established between the channel and the inner passage when the inner sliding sleeve descends. By setting positioning steel balls and outer hemispherical grooves, the positioning steel balls fall into the outer hemispherical grooves to achieve positioning when the inner sliding sleeve descends, exhibiting reliable, efficient, and intelligent characteristics. Attached Figure Description

[0015] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments 1 to 7 of the present invention.

[0016] Appendix Figure 2 For the appendix Figure 1 A schematic diagram of the left-side view structure.

[0017] Appendix Figure 3 For the appendix Figure 1 A schematic diagram of the front sectional view of the measurement module.

[0018] The codes in the attached diagram are as follows: 1 is the outer mandrel, 2 is the inner sliding sleeve, 3 is the shear pin, 4 is the positioning steel ball, 5 is the lower connector, 6 is the outer ring platform, 7 is the connecting hole, 8 is the mounting ring platform, 9 is the conduction hole, 10 is the enlarged diameter ring groove, 11 is the inner hemispherical groove, 12 is the outer hemispherical groove, 13 is the measuring housing, 14 is the lower end cover, 15 is the sealing plug, 16 is the temperature sensing sleeve, 17 is the pressure sensing sleeve, 18 is the matching sleeve, 19 is the temperature sensing fiber, 20 is the pressure sensing fiber, 21 is the reference fiber, 22 is the liquid chamber, 23 is the straightening support cylinder, 24 is the cable, and 25 is the spiral head. Detailed Implementation

[0019] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0020] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0021] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0022] Example 1: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the intelligent well completion floating casing device includes an outer mandrel 1, an inner sliding sleeve 2, a shearing pin assembly, a positioning steel ball 4, a measuring module, and a lower connector 5. An outer ring platform 6 is provided on the outer outer side of the middle portion of the outer mandrel 1. At least two vertically penetrating cable routing grooves are provided on the upper side of the outer ring platform 6 along its circumference. The inner sliding sleeve 2 is located inside the outer mandrel 1. The inner sliding sleeve 2 is a cylindrical shape with its opening facing upwards. At least two connecting holes 7 are provided on the lower outer side of the inner sliding sleeve 2 along its circumference. An mounting ring platform 8 is provided on the upper outer side of the inner sliding sleeve 2. The mounting ring platform 8 is fixedly installed to the outer mandrel 1 by at least two shearing pin assemblies. The mounting ring platform 8 has a mounting cavity, which contains a measuring module capable of monitoring the temperature and pressure of the fluid at the bottom of the well. The upper side of the mounting ring platform 8 has a transmission hole 9 that can communicate with the mounting cavity. The lower outer side of the inner sliding sleeve 2 has a lower connector 5 with its lower end located below it. The lower inner side of the lower connector 5 has an enlarged diameter annular groove 10. The upper outer side of the lower connector 5 has at least two mounting holes spaced along the circumference. The mounting holes have positioning steel balls 4. The inner side of the mandrel corresponding to the position of the mounting hole has an inner hemispherical groove 11. The outer side of the middle part of the inner sliding sleeve 2 corresponding to the position above the mounting hole has an outer hemispherical groove 12. In use, this invention addresses the issue of safe casing installation in horizontal wells with large displacement by connecting the outer mandrel 1 to the casing string and incorporating a floating coupling. The buoyancy of the floating coupling and the air trapped inside the casing within the casing shoe reduces friction between the well wall and the casing during installation, thus ensuring safe casing installation. A measurement module allows for monitoring of the temperature and pressure of the bottom-hole fluid during completion and production. A cable 24 within the cable tray enables bidirectional data transmission, facilitating the integration of an intelligent completion system. A connecting hole 7 and an enlarged annular groove 10 establish a cement slurry circulation channel between the inner sliding sleeve 2 and the inner channel during downward movement. A positioning steel ball 4 and an outer hemispherical groove 12 allow the positioning steel ball 4 to fall into the outer hemispherical groove 12 for positioning during the downward movement of the inner sliding sleeve 2.

[0023] This invention not only solves the problem of difficult casing running caused by high friction in horizontal wells with large displacement casing, reducing downhole complexity time and improving the safety and reliability of casing running (reducing downhole complexity time by about 20%), but also has the function of monitoring bottom hole fluid temperature and pressure, enabling bottom hole data upload and surface command issuance. This provides data support for decision-making in horizontal well fracturing and production processes, laying the technical foundation for intelligent well completion. Furthermore, this invention significantly reduces the risk of casing obstruction during running, improves efficiency during well completion, reduces completion risks, and achieves dynamic monitoring of well completion and oil production processes, thereby improving the efficiency of well completion and oil and gas production. It further enhances the functionality of the tool, enabling dynamic monitoring of bottom hole fluids and providing reliable data support for surface engineers' decisions. It also lays the foundation for accelerating the intelligentization of drilling and completion technology in my country, achieving cost reduction and efficiency improvement, and has strong application value.

[0024] The above-mentioned intelligent well completion floating casing device can be further optimized and / or improved according to actual needs:

[0025] Example 2: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the measurement module includes a measuring housing 13, a lower end cover 14, a sealing plug 15, a temperature sensing sleeve 16, a pressure sensing sleeve 17, a matching sleeve 18, a temperature sensing fiber 19, a pressure sensing fiber 20, and a reference fiber 21. The measuring housing 13 has a downward-facing mounting cavity, a liquid inlet hole on the upper side of the measuring housing 13, and a sealing plug 15 on the inner side of the middle part of the measuring housing 13. The mounting cavity above the sealing plug 15 is a liquid cavity 22. The lower end cover 14 is fixedly installed on the inner side of the lower end of the measuring housing 13. A sealing plug 15 is provided on the side, and three first mounting holes are provided on the sealing plug 15. A second mounting hole is provided on the lower end cover 14 corresponding to the position of the first mounting hole. A temperature-sensing sleeve 16, a pressure-sensing sleeve 17, and a matching sleeve 18 with their upper ends located in the liquid chamber 22 are respectively provided in the three first mounting holes. A temperature-sensing optical fiber 19, a pressure-sensing optical fiber 20, and a reference optical fiber 21 are respectively provided in the temperature-sensing sleeve 16, the pressure-sensing sleeve 17, and the matching sleeve 18. The lower ends of the temperature-sensing optical fiber 19, the pressure-sensing optical fiber 20, and the reference optical fiber 21 pass through the second mounting hole at the corresponding position. During use, when downhole fluid enters the liquid chamber 22 through the conduction hole 9 and the inlet hole, the temperature-sensing sleeve 16 expands due to heat and touches the temperature-sensing fiber optic cable 19, thereby measuring the temperature value. At the same time, when downhole fluid enters the hydraulic chamber, the pressure of the fluid is transmitted to the pressure-sensing sleeve 17, which touches the pressure-sensing fiber optic cable 20, thereby measuring the pressure value. The matching sleeve 18 and the reference fiber optic cable 21 can be used to test other parameters for backup, and can also measure the temperature and pressure values ​​simultaneously for reference and comparison, parameter calibration, and improvement of test accuracy.

[0026] Example 3: As shown in the attached document Figure 1 , 2As shown in Figure 3, the measuring module also includes a straightening support cylinder 23. The temperature sensing sleeve 16, pressure sensing sleeve 17, and matching sleeve 18 are all provided with straightening support cylinders 23 on their outer sides. The upper end of the straightening support cylinder 23 is located above the sealing plug 15, and the lower end of the straightening support cylinder 23 is located below the sealing plug 15. During use, this arrangement serves to straighten and support the device.

[0027] Example 4: As shown in the appendix Figure 1 , 2 As shown in Figure 3, the upper part of the outer ring platform 6 is a frustum shape with a smaller top and a larger bottom, while the lower part of the outer ring platform 6 is a frustum shape with a larger top and a smaller bottom. This design facilitates the assembly and disassembly of the upper and lower cables 24 during use.

[0028] Example 5: As shown in the attached document Figure 1 , 2 As shown in Figure 3, it also includes cables 24 and spiral heads 25. At least two cables 24 are provided in the cable tray, and spiral heads 25 are provided at both ends of the cables 24. During use, the cables 24 are covered with corrosion-resistant materials, and the spiral heads 25 are elastic and extensible. This design facilitates the quick assembly and disassembly of the upper and lower cables 24.

[0029] Example 6: As shown in the appendix Figure 1 , 2 As shown in Figure 3, the shear pin assembly includes shear pins 3 and springs. The mounting ring 8 is fixedly mounted to the outer mandrel 1 by at least two shear pins 3. A spring is provided between the inner end of the shear pin 3 and the mounting ring 8. During use, this arrangement facilitates the downward movement of the inner sliding sleeve 2 after the shear pin 3 has cut. Depending on the requirements, the shear pin 3 may be magnetic for positioning and current transmission; thus, the inner end of the shear pin 3 connects to the measuring module, and the outer end of the shear pin 3 connects to the cable 24 in the cable tray.

[0030] Example 7: As attached Figure 1 , 2 As shown in Figure 3, the upper end of the inner sliding sleeve 2 is a rubber stopper seat, and the lower end of the inner sliding sleeve 2 is a hemispherical bottom. During use, the rubber stopper seat facilitates the insertion of the rubber stopper, allowing it to sit in the seat and cut off the shearing pin 3; the hemispherical bottom facilitates drilling. Depending on requirements, the lower hemispherical bottom of the inner sliding sleeve 2 can be made of aluminum alloy, making subsequent drilling easier.

[0031] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A smart well completion floating casing running device, characterized in that... The system includes an outer mandrel, an inner sleeve, shear pin assemblies, positioning steel balls, a measuring module, and a lower connector. The outer mandrel has an outer ring platform on its outer side at the center, with at least two vertically penetrating wiring grooves spaced along its upper circumference. Inside the outer mandrel is an inner sleeve, which is cylindrical with an upward-opening shape. At least two connecting holes are spaced along its lower outer side at the circumference. An upper outer side of the inner sleeve has a mounting ring platform, which is fixedly mounted to the outer mandrel by at least two shear pin assemblies. The mounting ring platform has a mounting cavity containing a measuring module capable of monitoring the temperature and pressure of the fluid at the bottom of the well. A conduction hole communicating with the mounting cavity is located on the upper side of the mounting ring platform. A lower connector is located below the lower outer side of the inner sleeve, with an enlarged-diameter annular groove on its lower inner side. At least two mounting holes are spaced along its upper outer side at the circumference, each containing a positioning steel ball. The inner side of the mandrel corresponding to the mounting hole position has an inner... The inner sliding sleeve, located above the mounting hole, has an outer hemispherical groove on its outer side. The measurement module includes a measuring housing, a lower end cover, a sealing plug, a temperature-sensing sleeve, a pressure-sensing sleeve, a matching sleeve, a temperature-sensing fiber, a pressure-sensing fiber, and a reference fiber. The measuring housing has a downward-opening mounting cavity, a liquid inlet on its upper side, and a sealing plug on its inner side. The mounting cavity above the sealing plug is a liquid cavity. A lower end cover is fixedly installed on the inner side of the lower end of the measuring housing. The sealing plug has three first mounting holes on its inner side, and a second mounting hole is provided on the lower end cover corresponding to the first mounting holes. The temperature-sensing sleeve, pressure-sensing sleeve, and matching sleeve, with their upper ends located in the liquid cavity, are respectively housed in the three first mounting holes. The temperature-sensing fiber, pressure-sensing fiber, and reference fiber, respectively, are housed in the temperature-sensing sleeve, pressure-sensing sleeve, and matching sleeve. The lower ends of the temperature-sensing fiber, pressure-sensing fiber, and reference fiber pass through the corresponding second mounting holes.

2. The intelligent well completion floating casing device according to claim 1, characterized in that... The measurement module also includes a straightening support cylinder. The temperature sensing sleeve, pressure sensing sleeve and matching sleeve are all provided with a straightening support cylinder on the outer side of the middle. The upper end of the straightening support cylinder is located above the sealing plug and the lower end of the straightening support cylinder is located below the sealing plug.

3. The intelligent well completion floating casing device according to claim 1 or 2, characterized in that... The upper part of the outer ring platform is a truncated cone shape with a smaller top and a larger bottom, while the lower part of the outer ring platform is a truncated cone shape with a larger top and a smaller bottom.

4. The intelligent well completion floating casing device according to claim 1 or 2, characterized in that... It also includes cables and spiral heads. The cable tray contains at least two cables, and both ends of the cables are equipped with spiral heads.

5. The intelligent well completion floating casing device according to claim 3, characterized in that... It also includes cables and spiral heads. The cable tray contains at least two cables, and both ends of the cables are equipped with spiral heads.

6. The intelligent well completion floating casing device according to claim 1, 2, or 5, characterized in that... The shear pin assembly includes shear pins and springs. The mounting ring is fixedly mounted to the outer mandrel by at least two shear pins, and a spring is provided between the inner end of the shear pin and the mounting ring.

7. The intelligent well completion floating casing device according to claim 3, characterized in that... The shear pin assembly includes shear pins and springs. The mounting ring is fixedly mounted to the outer mandrel by at least two shear pins, and a spring is provided between the inner end of the shear pin and the mounting ring.

8. The intelligent well completion floating casing device according to claim 4, characterized in that... The shear pin assembly includes shear pins and springs. The mounting ring is fixedly mounted to the outer mandrel by at least two shear pins, and a spring is provided between the inner end of the shear pin and the mounting ring.

9. The intelligent well completion floating casing device according to claim 1, 2, 5, 7, or 8, characterized in that... The upper end of the inner sliding sleeve is a rubber stopper seat, and the lower end of the inner sliding sleeve is a hemispherical bottom.

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