A rotary auxiliary device for offshore standard penetration test drilling tools

Abstract

This utility model provides an auxiliary device for tightening standard penetration test (SPT) drill strings at sea, including a connecting seat, a SPT drill string pad fork, and a shift fork. The connecting seat includes a lower clamping plate and an upper clamping plate, which are connected by a connecting plate. The lower clamping plate has a lower U-shaped groove that can mate with a groove on a sampling drill string, and the upper clamping plate has an upper U-shaped groove. The SPT drill string pad fork can be locked in the upper U-shaped groove, and the SPT drill string pad fork has a first U-shaped groove that can mate with a groove on the female thread end of the SPT drill string. The first end of the shift fork has a second U-shaped groove that can mate with a groove on the male thread end of the SPT drill string, and the second end of the shift fork is used to connect to the wellhead rotary table. This device solves the problem of not being able to achieve mechanized and automatic tightening and loosening of two different specifications of drill strings on the same wellhead drilling rig, enabling offshore SPT testing to shift from labor-intensive to mechanized and automated operations, and comprehensively improving construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of marine standard penetration testing, and in particular to an auxiliary device for rotating marine standard penetration testing drill bits. Background Technology

[0002] The rapid development of the offshore wind power industry in recent years has brought about a large demand for geological exploration of wind farm sites. Wind farm site exploration requires the execution of standard penetration tests (SPTs) in the field, specifically using 50mm SPT drill bits (penetrating drill rods), along with a standard penetrator, a 63.5kg center hammer, a center hammer guide rod, a hammer pad, and retrieval tools. Since SPT operations use 50mm drill bits, while drilling and sampling operations use 127mm drill bits, when both sizes are used on the same equipment in the same situation, the wellhead drilling rig cannot simultaneously meet the mechanized operation of automatic screwing and unscrewing for both types of drill bits. In other words, the wellhead drilling rig on the survey vessel, suitable for 127mm drill bits, is not suitable for the automatic screwing, unscrewing, and connection of the 50mm drill bits used in SPT operations. Therefore, currently, the unscrewing and connection of 50mm drill bits (unscrewing two connected drill bits or connecting two independent drill bits) can only be done manually. This method is time-consuming, labor-intensive, and inefficient. Furthermore, manual screwing can result in insufficient torque when connecting adjacent drill bits, which often leads to loosening of drill bit threads during hammer tests, increasing the probability of accidents inside the hole. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an auxiliary device for turning marine standard penetration test drill bits, so as to solve the problems existing in the prior art.

[0004] To achieve the above and other related objectives, this utility model provides a rotary auxiliary device for offshore standard penetration test (SPT) drill strings, used in conjunction with a drilling and sampling device. The drilling and sampling device includes a sampling drill string and a wellhead drilling rig for driving the sampling drill string. The sampling drill string has a slot, and the wellhead drill string includes a wellhead rotary table disposed on the wellhead surface. The rotary auxiliary device includes a connecting seat, which includes a lower clamping plate and an upper clamping plate, connected to the upper clamping plate via a connecting plate. The lower clamping plate has a lower U-shaped clamp. The system includes: a lower U-shaped groove that mates with a groove on the sampling drill bit; an upper U-shaped groove on the upper clamping plate; a standard penetration test (SPT) tool pad fork that fits into the upper U-shaped groove and has a first U-shaped groove that mates with a groove on the female end of the SPT tool; and a shift fork with a second U-shaped groove at its first end that mates with a groove on the male end of the SPT tool, and a second end for connecting to the wellhead rotary table.

[0005] Furthermore, the connecting plate is U-shaped, and the opening end of the connecting plate faces the same direction as the opening ends of the lower U-shaped slot and the upper U-shaped slot, and a detachable safety pin is provided near the opening end of the connecting plate.

[0006] Furthermore, multiple safety pins are provided, and the multiple safety pins are arranged at intervals.

[0007] Furthermore, the standard penetration test tool pad fork is provided with a first handle.

[0008] Furthermore, the fork is provided with a second handle.

[0009] Furthermore, the standard penetration test (SPT) drill bit includes a drill rod body. A first flange larger than the drill rod body is provided at a first end. A screw is provided on the end face of the first flange. The first flange and the screw form the female thread end of the SPT drill bit. The groove on the female thread end of the SPT drill bit consists of two planar portions disposed on the circumferential surface of the first flange, and the two planar portions are arranged opposite to each other. A second flange larger than the drill rod body is provided at a second end. The interior of the second flange has a threaded hole adapted to the screw. The second flange forms the male thread end of the SPT drill bit. The groove on the male thread end of the SPT drill bit consists of two planar portions disposed on the circumferential surface of the second flange, and the two planar portions are arranged opposite to each other.

[0010] Furthermore, a first limiting plate is hinged to the left side of the upper snap-fit ​​plate, and a second limiting plate is hinged to the right side of the upper snap-fit ​​plate. The first limiting plate is provided with a first semi-circular hole, and the second limiting plate is provided with a second semi-circular hole. The first semi-circular hole and the second semi-circular hole can be combined to form a limiting hole that matches the diameter of the drill rod body.

[0011] Furthermore, the diameter of the sampling drill bit is 127 mm, and the diameter of the drill rod body is 50 mm.

[0012] As described above, the offshore SPT test drill string turning auxiliary device of this utility model has the following beneficial effects: the offshore SPT test drill string turning auxiliary device of this utility model enables two different specifications of drill strings to be automatically turned, disassembled and connected on the same wellhead drilling rig, solving the pain point that two different specifications of drill strings cannot be automatically turned and disassembled on the same wellhead drilling rig, and enabling offshore SPT test construction to shift from the initial heavy labor to mechanized automation, thus comprehensively improving construction efficiency. Attached Figure Description

[0013] Figure 1 The diagram shows the auxiliary device for turning the marine standard penetration test drill bit provided by this utility model in use.

[0014] Figure 2 The diagram shown is a structural schematic of the connector provided by this utility model.

[0015] Figure 3 The diagram shown is a structural schematic of the shift fork provided by this utility model.

[0016] Figure 4 The diagram shown is a structural schematic of the standard penetration test (SPT) drill bit pad fork provided by this utility model.

[0017] Explanation of reference numerals in the attached figures

[0018] 10 Connecting Seats

[0019] 11 Lower Card Connector

[0020] 110 Lower U-shaped slot

[0021] 12 Upper Card Connector

[0022] 120 U-shaped card slot

[0023] 121 First Limit Plate

[0024] 1210 First semicircular hole

[0025] 122 Second Limit Plate

[0026] 1220 Second semicircular hole

[0027] 13 Connecting Plate

[0028] 131 Insurance Sales

[0029] 20 Standard Penetration Test Drill String Pad Fork

[0030] 21 First U-shaped slot

[0031] 22 First Leader

[0032] 30 Shift Fork

[0033] 301 Second U-shaped slot

[0034] 302 Second-in-Command

[0035] 100 wellhead rotary table

[0036] 200 standard penetration test drill string

[0037] 201 Drill pipe body

[0038] 202 First flange

[0039] 203 Second flange Detailed Implementation

[0040] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Please see Figures 1 to 4 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] This utility model provides a rotary auxiliary device for offshore standard penetration test (SPT) drilling tools (hereinafter referred to as "rotation auxiliary device"). This rotary auxiliary device is used in conjunction with a drilling and sampling device, which is a corresponding operating equipment on an offshore SPT vessel. The drilling and sampling device includes a sampling drill string and a wellhead drilling rig for driving the sampling drill string. The sampling drill string has a slot, and the wellhead drilling rig includes a wellhead rotary table 100 mounted on the wellhead face, which can utilize the ship's hydraulic system to provide power for the rotary drilling string. Specifically, the sampling drill string is a cylindrical rod structure, and the slots on it are specifically two flat portions located on the circumference of the sampling drill string, with these two flat portions facing each other. Since both the sampling drill string and the wellhead drilling rig are conventional structures already existing in the art, they will not be described in detail here. Specifically, as... Figure 1 and Figure 2 As shown, the screwing auxiliary device includes a connecting seat 10, a standard penetration test (SPT) drill bit pad fork 20, and a shift fork 30. The connecting seat 10 includes a lower clamping plate 11 and an upper clamping plate 12, which are connected by a connecting plate 13. The lower clamping plate 11 has a lower U-shaped groove 110 that can mate with a groove on the sampling drill bit. The upper clamping plate 12 has an upper U-shaped groove 120, allowing the SPT drill bit pad fork 20 to be engaged with the upper clamping plate 11. The upper U-shaped groove 120 on the 2 is provided with a first U-shaped groove 21 on the standard penetration drill bit pad fork 20. The first U-shaped groove 21 can cooperate with the groove on the female or male end of the standard penetration drill bit 200. The first end of the shift fork 30 is provided with a second U-shaped groove 301. The second U-shaped groove 301 can cooperate with the groove on the male or female end of the standard penetration drill bit 200. The second end of the shift fork 30 can be connected to the wellhead rotary table 100 set on the wellhead surface of the existing wellhead drilling rig.

[0045] The method of using the offshore standard penetration test (SPT) drill string tightening auxiliary device of this utility model is as follows: When it is necessary to tighten, disassemble, or connect the sampling drill string, it can be automatically tightened directly by the wellhead drilling rig that works with it; when it is necessary to tighten, disassemble, or connect the SPT drill string inserted into the sampling drill string, such as... Figure 1As shown, firstly, the sampling drill string pad fork engages the lower slot on the female end of the sampling drill string to fix the sampling drill string relative to the wellhead surface, thus restricting its rotation relative to the wellhead surface. Then, the lower U-shaped slot 110 on the lower clamping plate 11 of the connecting seat 10 engages the upper slot on the female end of the sampling drill string, thus securing the connecting seat 10 onto the sampling drill string via the lower clamping plate 11 (at this time, the lower clamping plate 11 is located at the top of the sampling drill string pad fork). Since the sampling drill string cannot rotate relative to the wellhead surface, the connecting seat 10 also cannot rotate relative to the wellhead surface. Then, the standard penetration test drill string pad fork... The standard penetration test (SPT) fork 20 is engaged in the upper U-shaped groove 120 on the upper clamping plate 12 (at this time, the SPT fork 20 is located at the top of the female thread end of the sampling drill bit), and the first U-shaped groove 21 on the SPT fork 20 engages with the groove on the female thread end of the SPT 200. Thus, through the engagement between the SPT fork 20 and the upper clamping plate 12, and the engagement between the SPT fork 20 and the SPT 200, the rotation of the SPT 200 relative to the wellhead surface can be restricted. Then, the second U-shaped groove 301 on the shift fork 30 engages with the groove on the male thread end of the SPT 200 located above. When two standard penetration test (SPT) drill strings are connected, the male thread end of one SPT drill string is threaded to the female thread end of the other. Then, the wellhead rotary table 100 is rotated. Since the wellhead rotary table 100 is connected to the second end of the shift fork 30, the wellhead rotary table 100 can drive the shift fork 30 to rotate relative to the wellhead surface. The shift fork 30 will then drive the SPT drill string 200 above it to rotate. Consequently, the SPT drill string 200 above will rotate relative to the SPT drill string 200 below it that is held by the SPT drill string pad fork 20, thus achieving automatic rotation of the SPT drill string above. Tighten the upper standard penetration test (SPT) tool to connect with the lower SPT tool, or loosen and remove the upper SPT tool. Then remove the fork 30 from the SPT tool. If this is a connection operation between two SPT tools, after tightening the upper SPT tool, lower it down into the well. After lowering it to the appropriate position, take a new SPT tool and connect it according to the above operation. If this is a disassembly operation between two SPT tools, after loosening and removing the upper SPT tool, lift the lower SPT tool up by the length of one SPT tool and continue disassembling according to the above operation. In summary, the screwing auxiliary device of this utility model can replace the existing method of manually screwing the SPT drill bit, greatly reducing labor intensity, saving labor costs, and increasing work efficiency, saving time and effort. Furthermore, the screwing auxiliary device for offshore SPT test drill bits of this utility model enables automatic screwing, disassembly, and connection of two different specifications of drill bits on the same wellhead drilling rig, solving the problem that two different specifications of drill bits cannot be automatically screwed and disassembled on the same wellhead drilling rig. This transforms offshore SPT test construction from the initial labor-intensive process to mechanized automation, resulting in a comprehensive improvement in construction efficiency.

[0046] Specifically, in this embodiment, the sampling drill string has a diameter of 127mm, and the standard penetration test (SPT) drill string has a diameter of 50mm. This means the wellhead drilling rig can automatically rotate not only the 127mm diameter sampling drill string, but also the 50mm diameter SPT drill string with the aid of this rotating auxiliary device. Of course, in other optional embodiments, this invention does not limit the diameter of the sampling drill string and the SPT drill string; the rotating auxiliary device of this invention can be applied to drill strings of any different specifications.

[0047] Specifically, for ease of understanding, the above-mentioned standard penetration test (SPT) drill string and sampling drill string will be described in more detail here, such as... Figure 1 As shown, in this embodiment, the standard penetration test (SPT) drill bit 200 includes a drill rod body 201. The first end of the drill rod body 201 has a first flange 202 larger than the drill rod body 201, and the end face of the first flange 202 has a screw (not shown in the figure). The first flange and the screw form the female thread end of the SPT drill bit 200. The groove on the female thread end of the SPT drill bit is two flat portions (not shown in the figure) provided on the circumferential surface of the first flange 202, and the two flat portions are arranged opposite to each other. The second end of the drill rod body 200 has a second flange 203 larger than the drill rod body 201, and the interior of the second flange 203 has a threaded hole adapted to the screw. The second flange forms the male thread end of the SPT drill bit 200. The groove on the male thread end of the SPT drill bit is two flat portions provided on the circumferential surface of the second flange 203, and the two flat portions are arranged opposite to each other. Thus, when two standard penetration test (SPT) drill bits are connected, they are threaded together by a screw at the female thread end of one SPT drill bit and a threaded hole at the male thread end of the other SPT drill bit. Specifically, to facilitate the connection operation, the female thread end of the SPT drill bit has at least two slots, which are spaced vertically in the axial direction of the first flange 202. The male thread end of the SPT drill bit also has one slot. Of course, in other optional embodiments, the male thread end of the SPT drill bit may also have at least two slots, which are spaced vertically in the axial direction of the second flange 203.

[0048] Specifically, the structure of the sampling drill bit is exactly the same as that of the standard penetration test drill bit, so the structure of the sampling drill bit will not be described in detail here.

[0049] Specifically, in this embodiment, the first flange 202 and the second flange 203 are formed by thickening the outer wall at both ends of the drill pipe body 201, thereby enhancing the connection strength.

[0050] Furthermore, in order to improve the stability of the connection during use, such as... Figure 2As shown, in this embodiment, the connecting plate 13 is U-shaped. The open end of the connecting plate 13 faces the same direction as the open ends of the lower U-shaped slot 110 on the lower locking plate 11 and the upper U-shaped slot 120 on the upper locking plate 12. A detachable safety pin 131 is arranged near the open end of the connecting plate 13. By setting the connecting plate 13 to a U-shape and connecting the safety pin 131 at the open end of the U-shaped connecting plate, the sampling drill bit can be surrounded within the closed space formed by the U-shaped connecting plate and the safety pin 131. This prevents the connecting seat from shaking and breaking off from the sampling drill bit due to the ship's rolling and heave. Furthermore, connecting the safety pin at the open end of the U-shaped connecting plate ensures the stability of the open end of the connecting plate and prevents it from expanding and deforming outward.

[0051] To further enhance the stability of the connection of the connector 10 during use, in this embodiment, two safety pins 131 are provided, which are spaced apart vertically. Of course, in other optional embodiments, those skilled in the art can provide more safety pins according to actual needs. Specifically, in this embodiment, the safety pin is a screw.

[0052] Furthermore, considering that during offshore operations, the ship will bob up and down due to the waves, causing the standard penetration test drill bit 200 to move relative to the ship, making it difficult to operate when turning it, preferably, such as Figure 2 As shown, in this embodiment, a first limiting plate 121 is hinged to the left side of the upper locking plate 12, and a second limiting plate 122 is hinged to the right side of the upper locking plate 12. The first limiting plate 121 has a first semi-circular hole 1210, and the second limiting plate 122 has a second semi-circular hole 1220. The first semi-circular hole 1210 and the second semi-circular hole 1220 can be assembled to form a limiting hole that matches the diameter of the drill rod body 201. Figure 1As shown, since the connection point of the two standard penetration drill bits has a flange larger than the diameter of the drill rod body 201, during use, the first limiting plate 121 and the second limiting plate 122 on both sides of the upper clamping plate 12 are flipped upwards, so that the first limiting plate 121 and the second limiting plate 122 are flipped to the top of the upper clamping plate 12 and located below the connection point of the two standard penetration drill bits. Then, the limiting hole formed by the first semi-circular hole 1210 on the first limiting plate 121 and the second semi-circular hole 1220 on the second limiting plate 122 mates with the drill rod body 201. At this time, since the drill rod body 201 passes through the first semi-circular hole 1210 on the first limiting plate 121 and the second semi-circular hole 1220 on the second limiting plate 122, the limiting hole is engaged with the drill rod body 201. The second limiting plate 122 surrounds the limiting hole formed by the second semi-circular hole 1220 on the second limiting plate 122. The upper part of the first limiting plate 121 and the second limiting plate 122 has a flange larger than the diameter of the drill rod body 201. Therefore, the first limiting plate 121 and the second limiting plate 122 can limit the flange at the connection point of the two standard penetration test (SPT) tools, thereby preventing the SPT tool from moving downwards as a whole. This keeps the relative movement of the SPT tool to the ship within a controllable range, ensuring that the SPT tool can only move upwards and not downwards. This greatly facilitates the tightening operation of the SPT tool and effectively reduces the risks posed by the ship's heave to on-site construction operations. After connecting multiple SPT tools as needed, the first limiting plate 121 and the second limiting plate 122 can be rotated downwards and flipped to both sides of the upper clamping plate 12, allowing the SPT tool to be in a free state, facilitating subsequent SPT tests.

[0053] Specifically, such as Figure 1 As shown, in this embodiment, the fork 30 is Z-shaped, and a vertically extending protrusion (not shown in the figure) is provided on the wellhead turntable 100. When the wellhead turntable rotates, the protrusion on the wellhead turntable will abut against the second end of the fork 30, thereby pushing the fork 30 to rotate together.

[0054] Furthermore, in order to facilitate the taking and locking of the standard penetration test tool pad fork 20, a first handle 22 is provided on the standard penetration test tool pad fork 20, and in order to facilitate the taking and locking of the shift fork 30, a second handle 302 is provided on the shift fork 30.

[0055] In summary, the offshore SPT (Standard Penetration Test) drill string tightening auxiliary device of this invention enables automatic tightening, disassembly, and connection of two different specifications of drill strings on the same wellhead drilling rig. This solves the problem of the inability to achieve mechanized automatic tightening and disassembly of two different specifications of drill strings on the same wellhead drilling rig, transforming offshore SPT construction from labor-intensive to mechanized and automated, thus comprehensively improving construction efficiency. Simultaneously, it addresses the risks posed to on-site construction operations by the heave of the vessel during SPT operations on floating vessels. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0056] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A rotary auxiliary device for offshore standard penetration test (SPT) drill strings, used in conjunction with a drilling and sampling device, the drilling and sampling device comprising a sampling drill string and a wellhead drilling rig for driving the sampling drill string, the sampling drill string having a chuck groove, and the wellhead drilling rig comprising a wellhead rotary table disposed on the wellhead face; characterized in that, The turning auxiliary device includes: The connecting seat includes a lower clamping plate and an upper clamping plate, which are connected to each other via a connecting plate. The lower clamping plate is provided with a lower U-shaped groove that can mate with a groove on the sampling drill bit, and the upper clamping plate is provided with an upper U-shaped groove. The standard penetration test (SPT) tool pad fork can be locked in the upper U-shaped groove, and the SPT tool pad fork is provided with a first U-shaped groove, which can cooperate with the groove on the female or male end of the SPT tool. The shift fork has a second U-shaped groove at its first end, which can cooperate with the groove on the male or female end of the standard penetration test tool. The second end of the shift fork is used to connect to the wellhead rotary table.

2. Offshore marker drill string screwing assist device according to claim 1, characterized in that, The connecting plate is U-shaped, and the opening end of the connecting plate faces the same direction as the opening ends of the lower U-shaped slot and the upper U-shaped slot. A detachable safety pin is provided near the opening end of the connecting plate.

3. A marine pile driving rig screwing assist device according to claim 2, characterised in that, Multiple safety pins are provided, and the multiple safety pins are arranged at intervals.

4. The offshore auger assist device of claim 1, wherein, The standard penetration test drill bit fork is equipped with a first handle.

5. The offshore auger assist device of claim 1, wherein, The fork is equipped with a second handle.

6. The offshore auger assist device of claim 1, wherein, The standard penetration test (SPT) drill bit includes a drill rod body. A first flange larger than the drill rod body is provided at a first end. A screw is provided on the end face of the first flange. The first flange and the screw form the female thread end of the SPT drill bit. The groove on the female thread end of the SPT drill bit consists of two flat portions disposed on the circumferential surface of the first flange, and the two flat portions are arranged opposite to each other. A second flange larger than the drill rod body is provided at a second end. The interior of the second flange has a threaded hole adapted to the screw. The second flange forms the male thread end of the SPT drill bit. The groove on the male thread end of the SPT drill bit consists of two flat portions disposed on the circumferential surface of the second flange, and the two flat portions are arranged opposite to each other.

7. A marine pile driving rig screwing assist device according to claim 6, characterised in that, The upper snap-fit ​​plate has a first limiting plate hinged to its left side and a second limiting plate hinged to its right side. The first limiting plate has a first semi-circular hole and the second limiting plate has a second semi-circular hole. The first semi-circular hole and the second semi-circular hole can be combined to form a limiting hole that matches the diameter of the drill rod body.

8. Offshore marker drill string screwing assist according to claim 6 or 7, characterized in that, The diameter of the sampling drill bit is 127 mm, and the diameter of the drill rod body is 50 mm.

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