Conversion lifting section for replacing rotary guide tools

Abstract

This invention provides a conversion lifting section for replacing rotary steerable tools, comprising: an outer tube body, a lifting rod, an elastic buffer mechanism, a universal joint mechanism, and an instrument connecting rod. The upper end of the lifting rod is movably disposed within the inner cavity of the outer tube body via the elastic buffer mechanism, and the lower end of the lifting rod is connected to the upper end of the instrument connecting rod via the universal joint mechanism. An upper limit stop is provided in the inner cavity, and a positioning screw is provided on the circumferential sidewall of the outer tube body. When the elastic buffer mechanism is located between the upper limit stop and the positioning screw, the instrument connecting rod retracts back into the outer tube body. This invention increases the movement range of the lower instrument string of the connecting telescopic rod within the drill bit by 300mm, saving time and cost for RSS rotary steerable integrated drill bits.

Description

Technical Field

[0001] This invention relates to the field of drilling tools, and in particular to a conversion lifting section for replacing rotary steerable tools. Background Technology

[0002] Currently, Atlas rotary steerable tools and MWD (Measuring While Drilling) are connected via instrument-integrated drill string (SSS) connections. The instruments and drill string inside the SSS need to be installed in the workshop using relevant hoisting and hydraulic swivel equipment. Considering the geographical nature of oil drilling platforms and the cyclical nature of workshop operations, we have decided to combine the existing equipment on the drilling platform with a vertical lifting method to complete the integrated drill string replacement of the SSS rotary steerable tool.

[0003] During rotary steerable drilling, the rotary steerable tool and other flexible short-joint drill strings, as well as the protective short-joint drill strings and the internally connected downhole instrument string (rotary steerable adapter rod + MWD measurement while drilling adapter rod + MWD measurement while drilling connecting rod), are connected by external drill string screws, and the internal instrument string screws are connected to form a complete rotary steerable integrated drill string.

[0004] Due to the 200-hour service life of the rotary steerable tool, based on the length of the well section being constructed, and considering the transportation and time costs between the drilling platform and the base station workshop, and taking into account the on-site platform lifting equipment and hydraulic tongs, a lifting tool needs to be designed to connect the entire replacement instrument string and the drill string, based on the on-site disassembly process for replacing the rotary steerable tool. This would provide sufficient room for maneuver when disassembling the KET ADAPTER and the rotary steerable tool connecting rod, ensuring safe and convenient replacement of the Atlas rotary steerable tool on-site, while also saving time and costs associated with the RSS rotary steerable integrated drill string. Summary of the Invention

[0005] The present invention provides a conversion lifting section for replacing rotary guide tools to solve at least one of the above-mentioned technical problems.

[0006] To address the aforementioned problems, as one aspect of the present invention, a conversion lifting section for replacing rotary guide tools is provided, comprising: an outer tube body, a lifting rod, an elastic buffer mechanism, a universal joint mechanism, and an instrument connecting rod. The upper end of the lifting rod is movably disposed within the inner cavity of the outer tube body via the elastic buffer mechanism, and the lower end of the lifting rod is connected to the upper end of the instrument connecting rod via the universal joint mechanism. An upper limit portion is provided in the inner cavity, and a positioning screw is provided on the circumferential sidewall of the outer tube body. When the elastic buffer mechanism is located between the upper limit portion and the positioning screw, the instrument connecting rod retracts back into the outer tube body.

[0007] Preferably, the elastic buffer mechanism includes a sliding sleeve, a compression spring, a spring cover, and a fastening nut. The sliding sleeve is pivotally mounted on the outside of the lifting rod via a thrust bearing. The spring cover and the compression spring are sequentially sleeved on the lifting rod from top to bottom and located inside the sliding sleeve. The fastening nut is connected to the lifting rod and located above the spring cover.

[0008] Preferably, a spring support ring is formed protruding on the outer peripheral wall of the lifting rod, the lower end of the compression spring is supported on the upper surface of the spring support ring, and the thrust bearing is disposed on the lower surface of the spring support ring.

[0009] Preferably, a lifting nut is installed on the top of the lifting rod, and the lifting nut is located above the fastening nut.

[0010] Preferably, the universal connection mechanism includes an upper universal joint and a universal joint, the lower end of the lifting rod is connected to the upper universal joint, the upper universal joint is connected to the upper end of the universal joint through a first pin, and the lower end of the universal joint is connected to the upper end of the instrument connecting rod through a second pin.

[0011] Preferably, a connector protective sleeve is detachably installed at the lower end of the instrument connecting rod.

[0012] Preferably, the instrument connecting rod is threadedly connected to the connector protective sleeve.

[0013] Preferably, a sealing ring is provided at the lower end of the instrument connecting rod.

[0014] Preferably, a limiting step is provided at the lower end of the inner cavity.

[0015] Preferably, the upper limit position is an elastic retaining ring.

[0016] By adopting the above technical solution, the present invention can increase the movement range of the lower instrument string of the connecting telescopic connecting rod in the drill string by 300mm. This increases the vertical movement space by 300mm when disassembling the KETADAPTER and rotary steering tool connecting rod after disassembling (disconnecting) the protective short circuit and the rotary steering NC50 connecting buckle. This ensures safe and convenient equipment replacement of the Atlas rotary steering tool in the field, saving time and cost for the rotary steering integrated drill string. Attached Figure Description

[0017] Figure 1 The invention is illustrated schematically in use. Figure 1 ;

[0018] Figure 2 The invention is illustrated schematically in use. Figure 2 .

[0019] The attached diagram shows the following labels: 1. Outer tube; 2. Lifting rod; 3. Instrument connecting rod; 4. Inner cavity; 5. Upper limit position; 6. Positioning screw; 7. Sliding sleeve; 8. Compression spring; 9. Spring cover; 10. Fastening nut; 11. Thrust bearing; 12. Spring support ring; 13. Lifting nut; 14. Upper universal joint; 15. Universal joint; 16. First pin; 17. Second pin; 18. Joint protective sleeve; 19. Sealing ring; 20. Limiting step. Detailed Implementation

[0020] The embodiments of the present invention will be described in detail below, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0021] This invention provides a lifting tool for on-site conversion of rotary steerable integrated drilling tools (applicable to MWD measurement while drilling), which is a dedicated lifting tool for converting rotary steerable drilling tools used when connecting Atlas rotary steerable and MWD measurement while drilling instruments on oil drilling platforms.

[0022] The instrument disassembly and conversion lifting short-connector is mainly used for replacing rotary steerable drill strings when disassembling Atlas rotary steerable tools and MWD (Measuring While Drilling) instrument string connections on the drilling platform. It solves the problem of disassembling the integrated upper drill string (FLEX SUB + SAVER SUB), the internal instrument string connecting rod + FEED THROUGH MODLER (adjustment adapter rod) + adapter rod, and the rotary steerable tool connecting rod. It also lifts the upper drill string (FLEX SUB (flexible short-connector) + SAVER SUB (protective short-connector)) and the internal instrument string telescopic connecting rod + FEED THROUGH MODLER + KET. ADAPTER, through the design and manufacture of lifting tools for on-site conversion of directional drilling tools using the RSS rotary steerable integrated drilling tool (applicable to MWD measurement while drilling), facilitates on-site operation and replacement of rotary steerables. This makes the replacement of Atlas rotary steerables during the entire directional well construction process faster, simplifies the on-site steerable replacement process, and enhances safety and reliability. It maximizes the advantages of the RSS rotary steerable tool integrated drilling tool, which can be operated and replaced on-site at any time, saving time in deploying RSS steerables and more effectively coordinating the timeliness of RSS rotary steerable application.

[0023] This tool short connector is a specific conversion and lifting short connector used on the drilling platform to replace Atlas rotary steerable tools after the integration of Atlas rotary steerable and MWD (Measuring While Drilling) instruments and drill strings. It consists of components such as a drill string short connector, an instrument lifting connecting rod, and a telescopic connecting rod instrument connector.

[0024] As one aspect of the present invention, a conversion lifting section for replacing a rotary guide tool is provided, comprising: an outer tube body 1, a lifting rod 2, an elastic buffer mechanism, a universal joint mechanism, and an instrument connecting rod 3. The upper end of the lifting rod 2 is movably disposed in the inner cavity 4 of the outer tube body 1 via the elastic buffer mechanism, and the lower end of the lifting rod 2 is connected to the upper end of the instrument connecting rod 3 via the universal joint mechanism. An upper limit stop 5 is provided in the inner cavity 4, and a positioning screw 6 is provided on the circumferential side wall of the outer tube body 1. When the elastic buffer mechanism is located between the upper limit stop 5 and the positioning screw 6, the instrument connecting rod 3 retracts back into the outer tube body 1. Preferably, the upper limit stop 5 is an elastic retaining ring.

[0025] Preferably, the elastic buffer mechanism includes a sliding sleeve 7, a compression spring 8, a spring cover 9, and a fastening nut 10. The sliding sleeve 7 is pivotally mounted on the outside of the lifting rod 2 via a thrust bearing 11. The spring cover 9 and the compression spring 8 are sequentially sleeved on the lifting rod 2 from top to bottom and located inside the sliding sleeve 7. The fastening nut 10 is connected to the lifting rod 2 and located above the spring cover 9. The fastening nut 10 is used to limit the spring cover 9 and provide support for the upper end of the compression spring 8.

[0026] Preferably, a spring support ring 12 is protruding from the outer peripheral wall of the lifting rod 2, the lower end of the compression spring 8 is supported on the upper surface of the spring support ring 12, and the thrust bearing 11 is disposed on the lower surface of the spring support ring 12. The spring support ring 12 not only provides a limit for the thrust bearing 11, but also provides support for the lower end of the compression spring 8.

[0027] Preferably, a lifting nut 13 is installed on the top of the lifting rod 2, and the lifting nut 13 is located above the fastening nut 10.

[0028] Preferably, the universal connection mechanism includes an upper universal joint 14 and a universal joint 15. The lower end of the lifting rod 2 is connected to the upper universal joint 14. The upper universal joint 14 is connected to the upper end of the universal joint 15 through a first pin 16. The lower end of the universal joint 15 is connected to the upper end of the instrument connecting rod 3 through a second pin 17.

[0029] Preferably, a connector protective sleeve 18 is detachably installed at the lower end of the instrument connecting rod 3. Preferably, the instrument connecting rod 3 is threadedly connected to the connector protective sleeve 18. The connector protective sleeve 18 is used to protect the connecting threads at the lower end of the instrument connecting rod 3 from damage.

[0030] Preferably, a sealing ring 19 is provided at the lower end of the instrument connecting rod 3 to form a seal for the mud.

[0031] Preferably, a limiting step 20 is provided at the lower end of the inner cavity 4 to limit the descent position of the lifting rod 2.

[0032] In the above technical solution, during the transportation of the invention to the site, it is necessary to ensure that the instrument connecting rod 3 retracts into the outer tube 1. A thrust bearing 11 is installed in the sliding sleeve 7, and a spring support ring 12 is installed above the thrust bearing 11. A compression spring 8 is installed above the spring support ring 12, and the instrument connecting rod 3 is connected to the compression spring 8 by a spring cap 9. A fastening nut 10 is provided at the upper end of the instrument connecting rod 3 to prevent slippage. The fastening nut 10 also allows adjustment of the preload of the compression spring 8, thereby providing a certain degree of shock absorption and buffering to prevent tensile stress from damaging the instrument string components during use.

[0033] After the zero-end instrument connecting rod 3 and the upper universal joint 14 are connected by threads, the universal joint 15 is inserted into the upper universal joint 14 and the inner hole of the instrument connecting rod 3. It is then connected by the first pin 16 and the second pin 17 to form a universal connector. This is necessary because during the lowering and lowering of the drilling platform, the pendulum force of the drill string makes it difficult to control the concentricity of the drill string connection. The universal connector allows the lower instrument connecting rod 3 to freely connect to the lower telescopic connecting rod instrument string without being constrained by drill string swaying or misalignment, facilitating the connection of the instrument string. Furthermore, the upper limit stop 5 can stop the sliding sleeve 7 inside the outer tube 1 to prevent the entire instrument string connection assembly from slipping.

[0034] Alternatively, by unscrewing the positioning screw 6, the sliding sleeve 7 can be moved to the limiting step 20 of the outer tube body 1, allowing the telescopic connecting rod of the entire assembly to extend 300mm, thus achieving the purpose of docking with the downhole rotary steerable integrated drilling tool.

[0035] In addition, when the connector protective sleeve 18 is unscrewed, the thread at the lower end of the instrument connecting rod 3 can be connected with the threaded port of the telescopic connecting rod instrument string inside the downhole rotary guide integrated drill bit. After the connection is achieved through the sealing ring 19, a seal is achieved to prevent mud from seeping into the borehole of the drill bit.

[0036] By adopting the above technical solution, the present invention can increase the movement range of the lower instrument string of the telescopic connecting rod in the drill string by 300mm. This increases the vertical movement space by 300mm when disassembling the adapter rod and the rotary guide connecting rod after disassembling (disconnecting) the SAVER SUB (protective short circuit) and the rotary guide NC50 connecting buckle. This ensures safe and convenient equipment replacement of Atlas rotary guide tools on-site, saving time and cost for rotary guide integrated drill tools.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A conversion lifting section for replacing rotary guide tools, characterized in that, include: The outer tube (1), lifting rod (2), elastic buffer mechanism, universal joint mechanism, and instrument connecting rod (3) are provided. The upper end of the lifting rod (2) is movably disposed in the inner cavity (4) of the outer tube (1) through the elastic buffer mechanism. The lower end of the lifting rod (2) is connected to the upper end of the instrument connecting rod (3) through the universal joint mechanism. An upper limit part (5) is provided in the inner cavity (4). A positioning screw (6) is provided on the circumferential side wall of the outer tube (1). The instrument connecting rod (3) retracts back into the outer tube (1) when the elastic buffer mechanism is located between the upper limit part (5) and the positioning screw (6). The elastic buffer mechanism includes a sliding sleeve (7), a compression spring (8), a spring cover (9), and a fastening nut (10). The sliding sleeve (7) is pivotally mounted on the outside of the lifting rod (2) via the thrust bearing (11). The spring cover (9) and the compression spring (8) are sequentially sleeved on the lifting rod (2) from top to bottom and located inside the sliding sleeve (7). The fastening nut (10) is connected to the lifting rod (2) and located above the spring cover (9). A spring support ring (12) is formed protruding on the outer peripheral wall of the lifting rod (2). The lower end of the compression spring (8) is supported on the upper surface of the spring support ring (12). The thrust bearing (11) is located on the lower surface of the spring support ring (12). A lifting nut (13) is installed on the top of the lifting rod (2). The lifting nut (13) is located above the fastening nut (10).

2. The conversion lifting section for replacing a rotary guide tool according to claim 1, characterized in that, The universal connection mechanism includes an upper universal joint (14) and a universal joint (15). The lower end of the lifting rod (2) is connected to the upper universal joint (14). The upper universal joint (14) is connected to the upper end of the universal joint (15) through a first pin (16). The lower end of the universal joint (15) is connected to the upper end of the instrument connecting rod (3) through a second pin (17).

3. The conversion lifting section for replacing a rotary guide tool according to claim 1, characterized in that, The lower end of the instrument connecting rod (3) is detachably fitted with a connector protective sleeve (18).

4. The conversion lifting section for replacing a rotary guide tool according to claim 3, characterized in that, The instrument connecting rod (3) is threadedly connected to the connector protective sleeve (18).

5. The conversion lifting section for replacing a rotary guide tool according to claim 4, characterized in that, A sealing ring (19) is provided at the lower end of the instrument connecting rod (3).

6. The conversion lifting section for replacing a rotary guide tool according to claim 1, characterized in that, A limiting step (20) is provided at the lower end of the inner cavity (4).

7. The conversion lifting section for replacing a rotary guide tool according to claim 1, characterized in that, The upper limit part (5) is an elastic retaining ring.

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