Ocean rock-soil drilling and coring device for offshore drilling platform

Abstract

The utility model relates to the technical field of marine rock-soil coring, and discloses an offshore drilling platform marine rock-soil drilling coring device which comprises an inner threaded pipe, an inner pipe is in threaded connection with the interior of the inner threaded pipe, sliding grooves are formed in the left side and the right side of the interior of the inner pipe respectively, and sliding blocks are slidably connected with the interiors of the two sliding grooves respectively. And the same fixing frame is fixedly connected between every two adjacent sliding blocks, a rotating column is rotationally connected to the interior of each fixing frame, clamping rods are fixedly connected to the front side and the rear side of the outer wall of each rotating column, and clamps are fixedly connected to the bottoms of the two clamping rods. The fixing rod is rotated to drive the inner pipe to rotate, the inner pipe descends to the rock core position and continues to rotate, the tooth ring throws soil to expose the rock core, the clamping rod drives the clamp to move inwards, clamp the rock core, the rock core makes contact with the clamping plates, the damping pipe is extruded, vibration is reduced, completeness is ensured, the clamping rod is pulled to enable the sliding block to move upwards, the rock core is taken out, and therefore completeness of the rock core is ensured.

Description

Technical Field

[0001] This utility model relates to the field of marine rock and soil coring technology, and in particular to a marine rock and soil drilling coring device for offshore drilling platforms. Background Technology

[0002] A marine rock and soil core sampling device for offshore drilling platforms is used for marine rock and soil core sampling operations on offshore drilling platforms. In offshore drilling platform operations, obtaining accurate marine rock and soil samples is crucial for assessing geological stability and engineering feasibility. The rock and soil samples obtained through this device can help geologists to conduct in-depth analysis of stratigraphic structure and rock and soil mechanical properties. This not only provides key basis for the site selection and design of offshore engineering projects, but also promotes the continuous development of marine geological research.

[0003] Core-taking equipment features complex mechanical structures and hydraulic systems, including multiple interoperable drill bits, drill casings, core separation tubes, and hydraulic telescopic rods. This makes maintenance difficult and costly, requiring specialized technicians and equipment. Furthermore, a malfunction in any component can interrupt the entire core-taking operation, impacting progress. Existing technologies employ modular design, dividing the equipment into several relatively independent modules for easy installation, disassembly, and maintenance. When a module malfunctions, it can be directly replaced, reducing maintenance time and costs, simplifying the mechanical structure, minimizing unnecessary parts, and reducing equipment complexity. However, in practical use, the modular design generates vibration and friction during drilling, leading to core breakage, disturbance, or deformation. This affects the integrity of the core and its representativeness of the formation, impacting subsequent accurate assessments of geological conditions. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a marine rock and soil core drilling device for offshore drilling platforms. It aims to improve the problem in the existing technology where the modular design generates vibration and friction during drilling, leading to core breakage, disturbance, or deformation, which affects the integrity of the core and the representativeness of the strata, thus affecting the accurate judgment of subsequent geological conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a marine rock and soil drilling core sampling device for an offshore drilling platform, comprising an internally threaded pipe, an inner tube connected to the internal thread of the internally threaded pipe, a sliding groove on both the left and right sides of the inner tube, a slider slidably connected inside each of the two sliding grooves, a fixed frame fixedly connected between adjacent sliders, a rotating column rotatably connected inside the fixed frame, clamping rods fixedly connected to the front and rear sides of the outer wall of the rotating column, clamps fixedly connected to the bottom of each of the two clamping rods, shock-absorbing tubes fixedly connected between adjacent clamps, clamping plates fixedly connected between adjacent shock-absorbing tubes, a toothed ring provided at the bottom of the inner tube, a fixed rod fixedly connected to the front top of the inner tube, and an installation mechanism provided at the top of the toothed ring.

[0006] As a further description of the above technical solution:

[0007] The installation mechanism includes multiple positioning posts, the bottom of which is fixedly connected to the top periphery of the toothed ring. Positioning holes are provided around the bottom periphery of the inner tube. Threaded holes are provided around the bottom periphery of the toothed ring. Bolts are threaded into the interior of the multiple threaded holes. The tops of the multiple bolts penetrate the toothed ring and are threaded into the bottom of the inner tube. Washers are threaded into the bottom of the outer walls of the multiple bolts.

[0008] As a further description of the above technical solution:

[0009] Multiple anti-slip tubes are fixedly connected to the top of the outer wall of the internally threaded tube, and the multiple anti-slip tubes are designed to be equidistant.

[0010] As a further description of the above technical solution:

[0011] A rotating sleeve is rotatably connected to the outer wall of the fixed rod, and a circular plate is fixedly connected to the top of the fixed rod.

[0012] As a further description of the above technical solution:

[0013] Both clamps are fixedly connected to the top of a cap, and both caps have a smooth design.

[0014] As a further description of the above technical solution:

[0015] A fixing ring is fixedly connected to the bottom of the outer wall of the internally threaded tube, and a reflective strip is fixedly connected to the outer wall of the fixing ring.

[0016] As a further description of the above technical solution:

[0017] Both grooves are equally spaced on the left and right sides of the inner tube, and the two sliders are matched with the inner tube.

[0018] As a further description of the above technical solution:

[0019] Both clamping rods have chamfered outer walls, and the bottoms of the multiple positioning pins are equidistantly fixed to the top of the toothed ring.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the operator rotates the fixed rod to drive the inner tube to rotate. The inner tube can move up and down. After the inner tube descends to the core position, it continues to rotate. The toothed ring rotates to throw away the soil and expose the core. The clamping rod is driven by the force of the inner tube's rotation to move the clamp inward and clamp the core. The core first contacts the clamping plate, squeezing the shock-absorbing tube to reduce vibration and ensure its integrity. Pulling the clamping rod causes the slider to move up, and the core can be taken out, thus ensuring the integrity of the core.

[0022] 2. In this utility model, when installing the toothed ring, the positioning pin is inserted into the positioning hole to guide the installation and ensure the precise position of the toothed ring. The bolt is screwed into the threaded hole, and the bolt passes through the toothed ring and is tightly connected to the bottom of the inner tube, so that the toothed ring is firmly fixed to the bottom of the inner tube. This is sufficient to cope with complex marine operating environments and prevent loosening and displacement. A washer is screwed on the bottom of the bolt to effectively limit the degree of tightening, thereby enabling quick installation and removal of the toothed ring. Attached Figure Description

[0023] Figure 1 This is a perspective view of a marine rock and soil core sampling device for an offshore drilling platform proposed in this utility model;

[0024] Figure 2 This is a front view of a marine rock and soil drilling core sampling device for an offshore drilling platform proposed in this utility model;

[0025] Figure 3 This is a split view of the inner tube of a marine rock and soil drilling core sampling device for an offshore drilling platform proposed in this utility model.

[0026] Figure 4 This is a schematic diagram of the slider of a marine rock and soil core sampling device for an offshore drilling platform proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the positioning column of a marine rock and soil core sampling device for an offshore drilling platform proposed in this utility model.

[0028] Legend:

[0029] 1. Internally threaded tube; 2. Mounting mechanism; 201. Positioning pin; 202. Positioning hole; 203. Threaded hole; 204. Bolt; 205. Washer; 3. Inner tube; 4. Slide groove; 5. Slider; 6. Fixture; 7. Rotating column; 8. Clamping rod; 9. Fixture; 10. Shock-absorbing tube; 11. Clamping plate; 12. Toothed ring; 13. Fixing rod; 14. Anti-slip tube; 15. Rotating sleeve; 16. Round plate; 17. Cap; 18. Fixing ring; 19. Reflective strip. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a marine drilling and coring device for offshore drilling platforms, comprising an internally threaded pipe 1, with an inner pipe 3 internally threadedly connected to the inner pipe 1. Rotating the inner pipe 3 allows it to move up and down within the internally threaded pipe 1. Slide grooves 4 are provided on both the left and right sides of the inner pipe 3. Sliding sliders 5 are slidably connected inside each of the two slide grooves 4, allowing the sliders 5 to move up and down within the slide grooves 4. A common fixing frame 6 is fixedly connected between adjacent sliders 5. A rotating column 7 is rotatably connected inside the fixing frame 6. Clamping rods 8 are fixedly connected to the front and rear sides of the outer wall of the rotating column 7. Clamping fixtures 9 are fixedly connected to the bottom of each of the two clamping rods 8. Each adjacent clamp 9 is fixedly connected with a shock-absorbing tube 10, and each adjacent shock-absorbing tube 10 is fixedly connected with a clamping plate 11. When the two clamping rods 8 move inward, they drive the clamp 9 to move inward and clamp the core. When the core is clamped, it first contacts the clamping plate 11, and then the clamping plate 11 will squeeze the shock-absorbing tube 10. The shock-absorbing tube 10 will reduce the vibration when it encounters vibration, thus ensuring the integrity of the core. The bottom of the inner tube 3 is provided with a toothed ring 12. When the inner tube 3 rotates, the bottom toothed ring 12 will also rotate, which can throw away the mud on the seabed. The top front of the inner tube 3 is fixedly connected with a fixing rod 13 for rotating the inner tube 3. The top of the toothed ring 12 is provided with an installation mechanism 2.

[0032] Specifically, the internally threaded tube 1 is connected to the internally threaded tube 3 via threads. When the internally threaded tube 3 is rotated, it can move up and down inside the internally threaded tube 1. Slide grooves 4 are respectively opened on the left and right sides of the interior of the internally threaded tube 3. A slider 5 is slidably connected to each of the two slide grooves 4, and the slider 5 can move freely up and down within the slide grooves 4. The two sliders 5 are fixedly connected to the same fixed frame 6 on opposite sides. A rotating column 7 is rotatably connected inside the fixed frame 6. Clamping rods 8 are fixedly connected to the front and rear sides of the outer wall of the rotating column 7. Clamping fixtures 9 are fixed to the bottom of the clamping rods 8. Shock-absorbing tubes 10 are connected to opposite sides of the two clamping fixtures 9. Multiple shock-absorbing tubes 10... The two clamping rods 8 are connected to the clamping plate 11. When the two clamping rods 8 move inward, they will drive the clamping device 9 to move inward synchronously, thereby clamping the core. When the core is clamped, it first contacts the clamping plate 11. Then the clamping plate 11 squeezes the shock-absorbing tube 10. The shock-absorbing tube 10 can effectively reduce vibration when it encounters vibration, thereby ensuring the integrity of the core. A toothed ring 12 is provided at the bottom of the inner tube 3. When the inner tube 3 rotates, the toothed ring 12 at the bottom rotates accordingly, which can be used to remove the mud from the seabed. A fixing rod 13 is fixedly connected to the top front side of the inner tube 3. The operator can rotate the inner tube 3 by operating the fixing rod 13.

[0033] Reference Figure 5 The installation mechanism 2 includes multiple positioning posts 201. The bottom of each positioning post 201 is fixedly connected to the top periphery of the toothed ring 12. Positioning holes 202 are provided around the bottom periphery of the inner tube 3. The positioning posts 201 can be inserted into the positioning holes 202 and play a guiding role when installing the toothed ring 12. Threaded holes 203 are provided around the bottom periphery of the toothed ring 12. Bolts 204 are threadedly connected inside the multiple threaded holes 203. The top of each bolt 204 passes through the toothed ring 12 and is threadedly connected to the bottom of the inner tube 3. The toothed ring 12 is fixed to the bottom of the inner tube 3 by the bolts 204. Washers 205 are threadedly connected to the bottom of the outer wall of each bolt 204 to prevent the bolts 204 from being tightened.

[0034] Specifically, multiple positioning pins 201 are distributed around the top of the toothed ring 12, and their bottoms are fixedly connected to the toothed ring 12. Positioning holes 202 are correspondingly opened around the bottom of the inner tube 3. When installing the toothed ring 12, the positioning pins 201 can be accurately inserted into the positioning holes 202 to play a guiding role and ensure that the toothed ring 12 is installed in an accurate position. Multiple threaded holes 203 are provided around the bottom of the toothed ring 12. Each threaded hole 203 is threadedly connected to a bolt 204. The top of the bolt 204 passes through the toothed ring 12 and is threadedly fastened to the bottom of the inner tube 3, thereby firmly fixing the toothed ring 12 to the bottom of the inner tube 3. To prevent the bolts 204 from being over-tightened and damaging the components, washers 205 are threadedly connected to the bottom of the outer wall of multiple bolts 204. The washers 205 effectively limit the tightening degree of the bolts 204 and ensure the stability and reliability of the connection structure.

[0035] Reference Figure 1 and Figure 2 Multiple anti-slip tubes 14 are fixedly connected to the top of the outer wall of the internally threaded tube 1. The multiple anti-slip tubes 14 are designed to be equidistant to increase the friction with the hand. A rotating sleeve 15 is rotatably connected to the outer wall of the fixing rod 13. A round plate 16 is fixedly connected to the top of the fixing rod 13 to facilitate the rotation of the fixing rod 13. Both clamping rods 8 are fixedly connected to the top of the caps 17. Both caps 17 are designed to be smooth to facilitate the clamping of the clamping rods 8 inward.

[0036] Specifically, multiple anti-slip tubes 14 are evenly fixed on the top of the outer wall of the internally threaded tube 1, and are equidistantly distributed. This effectively increases the friction with the operator's hand, making it easier to rotate the internally threaded tube 1 more stably. A rotating sleeve 15 is rotatably connected to the fixing rod 13, and a round plate 16 is provided on its top, which facilitates the operator to rotate the fixing rod 13, thereby realizing the control of the inner tube 3. The smoothly designed cap 17 installed on the top of the clamping rod 8 reduces the obstruction when the clamping rod 8 clamps the rock core inward, ensuring a smoother clamping action.

[0037] Reference Figure 1 and Figure 2 A fixing ring 18 is fixedly connected to the bottom of the outer wall of the internally threaded tube 1. A reflective strip 19 is fixedly connected to the outer wall of the fixing ring 18 to make it easy to see the position of the device. Two sliding grooves 4 are equally spaced on the left and right sides inside the inner tube 3. Two sliders 5 match the inner tube 3. The outer walls of the two clamping rods 8 are chamfered. The bottoms of multiple positioning posts 201 are equally spaced and fixedly connected to the top of the toothed ring 12.

[0038] Specifically, the bottom of the outer wall of the internally threaded tube 1 is provided with a fixing ring 18, and the reflective strip 19 attached to its outer wall can reflect light in the complex marine environment, making it convenient for operators to quickly locate the device position. There are two sliding grooves 4 equidistantly opened on the left and right sides inside the inner tube 3, and the two matching sliders 5 can slide smoothly. The outer wall of the clamping rod 8 is chamfered to reduce collision obstacles during operation. Multiple positioning posts 201 are equidistantly fixed on the top of the toothed ring 12 to provide precise guidance for installation.

[0039] Working principle: The operator rotates the inner tube 3 by operating the fixed rod 13. Since the inner tube 3 is threadedly connected to the internal threaded tube 1, rotating the inner tube 3 allows it to move up and down inside the internal threaded tube 1. When the inner tube 3 descends to the core position, the operator continues to rotate the inner tube 3, and the bottom toothed ring 12 rotates accordingly to throw away the seabed mud and expose the core. The slider 5 in the sliding grooves 4 on the left and right sides inside the inner tube 3 can move up and down in the sliding grooves 4 because the fixed frame 6 is connected to the clamping rod 8. When the clamping rod 8 moves inward due to the force generated by the rotation of the inner tube 3, it drives the clamp 9 to move inward synchronously, thereby clamping the core. The moment the core is clamped, it first contacts the clamping plate 11. The clamping plate 11 squeezes the shock-absorbing tube 10. The shock-absorbing tube 10 performs the shock absorption function to reduce the impact of vibration on the core and ensure the integrity of the core. Subsequently, the operator pulls the clamping rod 8 to move the slider 5 upward, thereby removing the core.

[0040] Furthermore, during the installation of the toothed ring 12, the positioning pin 201 can be quickly and accurately inserted into the positioning hole 202, providing reliable guidance for the installation process and ensuring that the toothed ring 12 is installed in the correct position, thus avoiding subsequent failures caused by installation deviations. A bolt 204 is screwed into each threaded hole 203, with the top of the bolt 204 penetrating the toothed ring 12 and tightly threaded to the bottom of the inner tube 3. The toothed ring 12 is fixed to the bottom of the inner tube 3, ensuring that it will not loosen or shift in the complex marine operating environment. Washers 205 are threaded to the bottom of the outer wall of multiple bolts 204, which effectively limit the tightening degree of the bolts 204 and prevent damage to the components due to excessive force applied by the operator.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A marine geotechnical coring device for offshore drilling platforms, comprising a female threaded pipe (1), characterised in that: The inner thread pipe (1) is internally threaded with an inner pipe (3), the inner pipe (3) is provided with a sliding groove (4) on the left and right sides, the two sliding grooves (4) are internally and slidably connected with a sliding block (5), the two sliding blocks (5) are fixedly connected with the same fixed frame (6) between adjacent ones, the fixed frame (6) is rotatably connected with a rotating column (7), the rotating column (7) is fixedly connected with a clamping rod (8) on the front and rear sides of the outer wall, the two clamping rods (8) are fixedly connected with a clamp (9) at the bottom, the two clamping rods (9) are fixedly connected with a damping pipe (10) between adjacent ones, a plurality of damping pipes (10) are fixedly connected with a clamping plate (11) between adjacent ones, the inner pipe (3) is provided with a tooth ring (12) at the bottom, the inner pipe (3) is fixedly connected with a fixed rod (13) at the top front side, the tooth ring (12) is provided with a mounting mechanism (2) at the top.

2. A marine geotechnical coring device for an offshore drilling platform as defined in claim 1, wherein: The mounting mechanism (2) comprises a plurality of positioning columns (201), the bottom of the plurality of positioning columns (201) is fixedly connected around the top of the tooth ring (12), the bottom of the inner pipe (3) is provided with a positioning hole (202) around, the bottom of the tooth ring (12) is provided with a threaded hole (203) around, the inner of the plurality of threaded holes (203) is threadedly connected with a bolt (204), the top of the plurality of bolts (204) penetrates the tooth ring (12) and is threadedly connected with the bottom of the inner pipe (3), the outer wall bottom of the plurality of bolts (204) is threadedly connected with a gasket (205).

3. A marine geotechnical coring device for use in offshore drilling platform operations according to claim 1, wherein: The outer wall top of the inner thread pipe (1) is fixedly connected with a plurality of anti-skid pipes (14), the plurality of anti-skid pipes (14) are designed at equal intervals.

4. A marine geotechnical coring device for use in offshore drilling platform operations according to claim 1, wherein: The outer wall of the fixed rod (13) is rotatably connected with a rotating sleeve (15), the top of the fixed rod (13) is fixedly connected with a circular plate (16).

5. A marine geotechnical coring device for use in offshore drilling platform operations according to claim 1, wherein: The top of the two clamping rods (8) is fixedly connected with a cap (17), the two caps (17) are designed as round and smooth.

6. A marine geotechnical coring device for offshore drilling platforms as defined in claim 1, wherein: The outer wall bottom of the inner thread pipe (1) is fixedly connected with a fixed ring (18), the outer wall of the fixed ring (18) is fixedly connected with a reflective strip (19).

7. A marine geotechnical coring device for use in offshore drilling platform operations according to claim 1, wherein: The two sliding grooves (4) are equidistantly provided in the inner pipe (3) on the left and right sides, the two sliding blocks (5) are matched with the inner pipe (3).

8. A marine geotechnical coring device for an offshore drilling platform according to claim 2, wherein: The outer wall of the two clamping rods (8) is designed as a chamfer, the bottom of the plurality of positioning columns (201) is fixedly connected at equal intervals on the top of the tooth ring (12). The outer wall of the two clamping rods (8) is designed as a chamfer, the bottom of the plurality of positioning columns (201) is fixedly connected at equal intervals on the top of the tooth ring (12).

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