Threaded connection for hammering interconnection of tubular members

Abstract

A threaded connection for driving interconnecting tubular members into the ground, such as onshore land, for the exploration and production of oil and gas wells, the threaded connection comprising a pin member comprising an outer shoulder, a pin head and a tapered pin thread portion between the outer shoulder and the pin head, and a box member comprising an inner shoulder, a box head and a tapered box thread portion between the inner shoulder and the box head.

Description

Technical Field

[0001] This invention relates to a threaded connection for hammering interconnected tubular components into the ground for exploration and production of oil and gas wells. The ground can be any type of surface, such as onshore land. The invention also relates to a method for hammering said interconnected tubular components into the ground for exploration and production of hydrocarbon wells. Background Technology

[0002] Hammering is used to drive a string of interconnected tubular components into the ground. A drive chaser is placed over the string of tubular components to apply hammering impact. This is a time-saving and therefore relatively inexpensive method of driving the string of tubular components into the ground. A seal is typically provided between the engaging threaded portions and the pin head to protect the threaded connection from damage caused by overpressure within the threaded connection. Summary of the Invention

[0003] Known threaded connections used for hammering interconnected tubular components into the ground for hydrocarbon exploration and production have the disadvantage that they can be damaged. These known threaded connections may have the disadvantage that determining whether final assembly of the threaded connection has been achieved during tightening is difficult or time-consuming. They may also have the disadvantage that the threaded connection can be damaged by hammering, thus impairing its general performance. Furthermore, they may have the disadvantage that the sealing performance is negatively affected by hammering or that the threaded connection is damaged by hammering, resulting in impaired overall performance.

[0004] Brief description of the invention

[0005] The object of this invention is to provide an improved or at least alternative threaded connection for hammering interconnected tubular components underground to explore and produce oil and gas wells. The threaded connection includes;

[0006] - A pin component, comprising an outer shoulder, a pin head, and a tapered pin thread portion located between the outer shoulder and the pin head.

[0007] - A sleeve component comprising an inner shoulder, a sleeve head, and a tapered sleeve threaded portion located between the inner shoulder and the sleeve head, wherein

[0008] --The pin thread portion and the sleeve thread portion are configured to mesh with each other between the rotating tight components of the threaded connection.

[0009] --The pin thread portion and sleeve thread portion include hook-shaped threads, which, in the final assembly of the threaded connection, provide radial interference between the crest of the pin thread portion and the root of the sleeve thread portion and / or between the crest of the sleeve thread portion and the root of the pin thread portion.

[0010] --The bearing tooth sides of the hook-shaped threads of the pin thread portion and the sleeve thread portion come into contact with each other in the final assembly of the threaded connection.

[0011] --The hook-shaped threads of the pin thread portion and the sleeve thread portion are located at a distance from each other's threaded sides in the final assembly of the threaded connection.

[0012] --In the final assembly, the threaded connection has no seal between the engaging pin thread portion and the sleeve thread portion and the pin head.

[0013] --In the final assembly of a threaded connection, the sleeve head contacts the outer shoulder, and

[0014] --In the final assembly of a threaded connection, the pin head is located at a distance from the inner shoulder of the inner shoulder.

[0015] The threaded connection is configured to allow the sleeve head to contact the outer shoulder in the final assembly. This allows one to determine when the final assembly is achieved by checking whether the sleeve head is in contact with the outer shoulder during the rotational assembly of the threaded connection. This is an effective and efficient way to determine when the final assembly of the threaded connection is reached.

[0016] For threaded connections to be hammered, achieving the correct configuration of the final assembly is crucial to ensure that the impact force generated during hammering is transmitted from the pin member to the sleeve member along the correct path. If the threaded connection is hammered into the ground without the outer shoulder and sleeve head contacting each other, the impact force generated during hammering will be transmitted primarily from the pin member to the sleeve member through the engaging pin thread and sleeve thread portions. This creates a high risk of damage to the pin thread and sleeve thread portions due to factors such as wear and plastic deformation.

[0017] In use, after the final assembly of the threaded connection is achieved, the tubular components interconnected via the threaded connection are hammered into the ground. As previously mentioned, this is to ensure that the impact force caused by hammering is transmitted along the correct path from the pin component to the sleeve component. During hammering, the pin component is positioned on top of the sleeve component. In this case, the impact force is transmitted from the pin component to the sleeve component primarily through the contacting outer shoulder and the sleeve head. The fact that the impact force caused by hammering first moves through the outer shoulder in contact with the sleeve head provides a relevant degree of protection against the impact force for the engaging pin thread portion and sleeve thread portion.

[0018] The impact of impact on threaded connections is further improved by the fact that, in the final assembly, the facing engagement tooth sides of the hook threads of the pin thread portion and the sleeve thread portion are located at a distance from each other's tooth sides, and there is radial interference between the crests and roots of the teeth of the pin thread portion and the sleeve thread portion. This tooth side distance between the engagement tooth sides allows the pin thread portion and the sleeve thread portion to move a certain distance relative to each other under the impact of a hammer blow. This movement between the pin thread portion and the sleeve thread portion, together with the frictional force generated by the radial interference and acting against said movement, forms an energy-absorbing buffer to absorb the energy from the impact force before the engagement tooth sides begin to contact.

[0019] The threaded connection is configured such that the pin head is located at a distance from the inner shoulder of the inner shoulder in the final assembly. This ensures that the impact force of the hammering is transmitted primarily through the threaded connection over an increased radial distance between the surface of the first outer shoulder and the surface of the first sleeve head.

[0020] The impact force from hammering generates a shock wave, which moves through the threaded connection. The shock wave first creates compression in the threaded connection, followed by tension. The engaged pin thread and sleeve thread are the only components in the threaded connection that bear the tensile force. The facing, load-bearing tooth sides of the hook-shaped thread contact each other in the final assembly, ensuring that the threaded connection can withstand the tension generated by the shock wave. Furthermore, the hook-shaped thread helps maintain contact between the outer shoulder and the sleeve head as the shock wave moves through the threaded connection.

[0021] In one embodiment of the threaded connection

[0022] --The threaded connection defines the central axis in the final components of the threaded connection.

[0023] --The outer shoulder includes a first outer shoulder surface, a second outer shoulder surface, and a shoulder retaining surface.

[0024] --The first outer shoulder surface is located at the first radial shoulder distance from the central axis and the first axial shoulder distance from the pin thread portion.

[0025] --The second outer shoulder surface is located at the distance from the second radial shoulder of the central axis and the distance from the second axial shoulder of the pin thread portion.

[0026] --The first radial shoulder distance is greater than the second radial shoulder distance.

[0027] --The shoulder distance along the first axis is less than the shoulder distance along the second axis.

[0028] --The shoulder retaining surface is located between the first outer shoulder surface and the second outer shoulder surface.

[0029] --The sleeve head includes a first sleeve head surface, a second sleeve head surface, and a sleeve retaining surface.

[0030] --The first sleeve head surface is located at the first radial sleeve distance from the central axis and the first axial sleeve distance from the sleeve thread portion.

[0031] --The second sleeve head surface is located at the second radial sleeve distance from the central axis and the second axial sleeve distance from the sleeve thread portion.

[0032] --The first radial sleeve distance is greater than the second radial sleeve distance.

[0033] --The distance between the first axial sleeve and the second axial sleeve is less than the distance between the two axial sleeves.

[0034] --The sleeve retaining surface is located between the first sleeve head surface and the second sleeve head surface.

[0035] --In the final assembly of the threaded connection, the first outer shoulder surface and the first sleeve head surface are in contact with each other; --In the final assembly of the threaded connection, the second sleeve head surface is located at a distance from the outer shoulder of the second outer shoulder surface; and

[0036] --In the final assembly of a threaded connection, the shoulder retaining surface and the sleeve retaining surface face each other.

[0037] In the final assembly of the threaded connection, the first outer shoulder surface and the first sleeve head surface are in contact with each other, and the second sleeve head surface is located at an outer shoulder distance from the second outer shoulder surface. Because the first outer shoulder surface and the first sleeve head surface are radially farther from the threaded portion than the second outer shoulder surface and the second sleeve head surface, impact forces are transmitted through the threaded connection at an increased radial distance from the threaded portion. This provides a further degree of protection against impact forces to the engaging threaded portion.

[0038] Threaded connections do not have any seal (such as a metal-to-metal seal or resilient seal) between the engaging threaded portions and the pin in their final assembly. A seal is typically provided between the engaging threaded portions and the pin to protect the threaded connection from damage caused by overpressure within the connection itself.

[0039] The shoulder retaining surface and the sleeve retaining surface provide further protection against damage caused by overpressure within the threaded connection. These surfaces prevent deformation due to overpressure by locking the sleeve head and preventing outward displacement. Preventing radial movement of the sleeve head away from the central axis is crucial for maintaining the structural integrity of the threaded connection required for hammering. Furthermore, such radial movement of the sleeve head can damage the last engaging teeth of the meshing thread.

[0040] In one embodiment of the threaded connection, the complete first outer shoulder surface is located at a greater radial distance from the central axis than the second outer shoulder surface, the complete first outer shoulder surface is located at a smaller axial distance from the pin thread portion than the second outer shoulder surface, the complete first sleeve head surface is located at a greater radial distance from the central axis than the second sleeve head surface, and the complete first sleeve head surface is located at a smaller axial distance from the sleeve thread portion than the second sleeve head surface.

[0041] In one embodiment of the threaded connection, the shoulder retaining surface is located between the first outer shoulder surface and the second outer shoulder surface when viewed in the axial direction along the central axis and when viewed in the radial direction relative to the central axis, and the sleeve retaining surface is located between the first sleeve head surface and the second sleeve head surface when viewed in the axial direction along the central axis and when viewed in the radial direction relative to the central axis.

[0042] In one embodiment of the threaded connection, the first outer shoulder surface and the first sleeve head surface extend perpendicular to the central axis of the threaded connection. This is beneficial for maintaining the structural integrity of the threaded connection when the first outer shoulder surface and the first sleeve head surface, which are in contact with each other in the final assembly, transmit forces during hammering.

[0043] In the embodiment of the threaded connection, the surface of the first outer shoulder extends at an angle λ1 of 90 degrees relative to the central axis of the threaded connection, and the surface of the first sleeve head extends at an angle δ1 of 90 degrees relative to the central axis of the threaded connection.

[0044] In one embodiment of the threaded connection, the second outer shoulder surface and the second sleeve head surface extend perpendicular to the central axis of the threaded connection. This helps maintain the structural integrity of the threaded connection even when the second outer shoulder surface and the second sleeve head surface come into contact with each other during hammering.

[0045] In one embodiment of the threaded connection, the second outer shoulder surface extends at an angle λ2 of 90 degrees relative to the central axis of the threaded connection, and the second sleeve head surface extends at an angle δ2 of 90 degrees relative to the central axis of the threaded connection.

[0046] In one embodiment of the threaded connection, the first outer shoulder surface and the first sleeve head surface have an axial interference of less than or equal to 0.2 mm in the final assembly of the threaded connection. The axial interference is measured axially along the central axis of the threaded connection. In the final assembly of the threaded connection, the axial interference may be greater than 0 and less than or equal to 0.2 mm. The axial interference may be between 0.01 mm and 0.1 mm and includes 0.01 mm and 0.1 mm. The axial interference is preferably (approximately) 0.05 mm.

[0047] In one embodiment of the threaded connection, in the final assembly of the threaded connection, the distance between the outer shoulder surfaces of the second outer shoulder and the second sleeve head is less than or equal to 0.3 mm. The outer shoulder distance is measured axially along the central axis of the threaded connection. In the final assembly of the threaded connection, the outer shoulder distance can be greater than 0 mm and less than or equal to 0.3 mm. The outer shoulder distance can be between 0.02 mm and 0.2 mm and includes both 0.02 mm and 0.2 mm. The outer shoulder distance is preferably (approximately) 0.1 mm.

[0048] In one embodiment of the threaded connection, the shoulder retaining surface extends at an angle φ relative to the central axis of the threaded connection, the angle φ being between and including 5 degrees and 11 degrees, and the sleeve retaining surface extends at an angle ε relative to the central axis of the threaded connection, the angle ε being between and including 5 degrees and 11 degrees. This configuration of the shoulder retaining surface and the sleeve retaining surface facilitates the assembly process of the threaded connection. Angles φ and ε can be (substantially) equal to each other. The shoulder retaining surface preferably extends at an angle φ of (approximately) 8 degrees relative to the central axis of the threaded connection. The sleeve retaining surface preferably extends at an angle ε of (approximately) 8 degrees relative to the central axis of the threaded connection.

[0049] In one embodiment of the threaded connection, the shoulder retaining surface and the sleeve retaining surface are configured to prevent radial movement of the sleeve head away from the central axis.

[0050] In one embodiment of the threaded connection, the threaded connection in the final assembly has no seal between the engaging pin thread portion and the sleeve thread portion and the sleeve head.

[0051] In one embodiment of the threaded connection, the pin member includes an inner pin guide surface located between the pin thread portion and the pin head, and an outer pin guide surface located between the pin thread portion and the outer shoulder; the sleeve member includes an inner sleeve guide surface located between the sleeve thread portion and the inner shoulder, and an outer sleeve guide surface located between the sleeve thread portion and the sleeve head; the inner pin guide surface and the inner sleeve guide surface are configured to move along each other during assembly and be opposite each other in the final assembly; and the outer pin guide surface and the outer sleeve guide surface are configured to move along each other during assembly and be opposite each other in the final assembly.

[0052] In one embodiment of the threaded connection, the sleeve member includes an outer sleeve connector surface and a first sleeve head surface extends to or adjacent to the outer sleeve connector surface.

[0053] In one embodiment of the threaded connection, the pin member includes an outer pin connector surface and a first outer shoulder surface extends to or adjacent to the outer pin connector surface.

[0054] In one embodiment of the threaded connection, in the final assembly of the threaded connection, the radial interference between the crest of the pin thread portion and the root of the sleeve thread portion and / or between the crest of the sleeve thread portion and the root of the pin thread portion is less than 0.25 mm, particularly less than 0.2 mm, and even more particularly between 0.05 mm and 0.15 mm, and includes 0.05 mm and 0.15 mm. The radial interference is preferably 0.1 mm.

[0055] In one embodiment of the threaded connection, the threaded connection is configured such that, in the final assembly and under a predetermined pressure acting on the threaded connection in the direction along the central axis, the pin head and the inner shoulder contact each other while the facing engagement teeth do not contact each other.

[0056] In one embodiment of the threaded connection, when viewed along the central axis, the spacing between the facing engagement teeth is greater than that between the pin head and the inner shoulder.

[0057] In one embodiment of the threaded connection, in the final assembly of the threaded connection, the inner shoulder distance is greater than 0 mm and less than 0.3 mm. Preferably, in the final assembly of the threaded connection, the inner shoulder distance is greater than 0 mm and less than 0.24 mm. The inner shoulder distance is measured axially along the central axis of the threaded connection.

[0058] In one embodiment of the threaded connection, in the final assembly of the threaded connection, the flank distance is between 0.1 and 0.25 mm and includes both 0.1 and 0.25 mm. The flank distance is measured axially along the central axis of the threaded connection.

[0059] In one embodiment of the threaded connection, the pin member includes an inner surface of the pin member, the sleeve member includes an inner surface of the sleeve member, and in the final assembly of the threaded connection, the inner surfaces of the pin member and the inner surfaces of the sleeve member extend flush with each other.

[0060] In one embodiment of the threaded connection, the inner surfaces of the pin member and the sleeve member are both located at a radius R1 from the inner member surface of the central axis.

[0061] In one embodiment of the threaded connection;

[0062] - The pin component includes a pin tube assembly having an outer surface of the pin tube assembly located at a distance R2 from the outer surface of the pin tube assembly on the central axis.

[0063] - The pin component includes a pin component shoulder that forms an outer shoulder and is located between the pin tube component and the pin threaded portion.

[0064] - The pin component includes a pin connector part extending from the shoulder of the pin component to the pin head.

[0065] - The sleeve component includes a sleeve tube part having an outer surface of the sleeve tube part located at a distance R3 from the central axis.

[0066] - The sleeve component includes a sleeve component shoulder that forms an inner shoulder and is located between the sleeve tube component and the sleeve threaded portion.

[0067] - The sleeve assembly includes a sleeve connector component that extends from the shoulder of the sleeve assembly to the sleeve head.

[0068] In the final assembly, the pin connector component and the sleeve connector component together define the outer connector surface, which is located at an outer connector radius R4 from the central axis.

[0069] - The outer connector radius R4 is greater than each of the outer surface radius R2 of the pin assembly and the outer surface radius R3 of the sleeve assembly.

[0070] In one embodiment of the threaded connection, the outer connector radius R4 is between R2+13mm and R2+19mm and includes both R2+13mm and R2+19mm.

[0071] In one embodiment of the threaded connection, the outer connector radius R4 is between R3+13mm and R3+19mm and includes both R3+13mm and R3+19mm.

[0072] In one embodiment of the threaded connection, the outer surface radius R2 of the pin component is equal to the outer surface radius R3 of the sleeve component.

[0073] In one embodiment of the threaded connection;

[0074] - The pin transition area with a pin transition radius R5 is located between the outer surface of the pin tube component and the surface of the outer connector.

[0075] - The sleeve transition area with a sleeve transition radius of R6 is located between the outer surface of the sleeve tube component and the surface of the outer connector, and

[0076] - The transition radius of the pin, R5, is equal to or greater than the transition radius of the sleeve, R6.

[0077] In one embodiment of the threaded connection, the pin transition radius R5 is between 2 mm and 20 mm and includes 2 mm and 20 mm, and the sleeve transition radius R6 is between 2 mm and 8 mm and includes 2 mm and 8 mm.

[0078] In one embodiment of the threaded connection, the pin member and the sleeve member include single-pass threads formed by the pin thread portion and the sleeve thread portion, respectively.

[0079] In one embodiment of the threaded connection, the pin thread portion and the sleeve thread portion extend at a cone angle α relative to the central axis, the cone angle α being between and including 6 degrees and 11 degrees.

[0080] In one embodiment of the threaded connection, the pin thread portion and the sleeve thread portion include multiple threads configured to be formed by rotational configuration between and including 180 degrees and 360 degrees.

[0081] In one embodiment of the threaded connection, the inner shoulder includes a pin head stop surface facing the pin head in the final assembly and an inner stop surface located at the distance of the inner shoulder, and the inner stop surface and the pin head stop surface extend at a stop angle β relative to the central axis of the threaded connection, the stop angle β being between 4 degrees and 12 degrees and including 4 degrees and 12 degrees.

[0082] In one embodiment of the threaded connection, the threaded connection is configured to achieve final assembly during rotational assembly when contact is achieved between the first sleeve head surface and the first outer shoulder surface.

[0083] In one embodiment of the threaded connection, the threaded connection is configured to be hammered into the ground after the final assembly has been reached, and during hammering, the pin member is positioned on top of the sleeve member.

[0084] In one embodiment of the threaded connection, the pin member includes a pin tube component having a pin tube component outer surface located at a pin tube component outer surface radius R2 from the central axis, and 2xR2 is between 508 mm and 1016 mm and includes 508 mm and 1016 mm (between 20 inches and 40 inches and includes 20 inches and 40 inches).

[0085] In one embodiment of the threaded connection, the sleeve component includes a sleeve tube component having an outer surface located at a radius R3 of the outer surface of the sleeve tube component from the central axis, and 2xR3 is between 508 mm and 1016 mm and includes 508 mm and 1016 mm (between 20 inches and 40 inches and includes 20 inches and 40 inches).

[0086] In one embodiment of the threaded connection, the threaded connection is configured to interconnect tubular members with an outer diameter between 508 mm and 1016 mm and including 508 mm and 1016 mm (between 20 inches and 40 inches and including 20 inches and 40 inches).

[0087] Those skilled in the art will understand that embodiments of the threaded connection according to the present invention can be formed by combining any number of features of the above-defined embodiments of the threaded connection.

[0088] The present invention also relates to a method for hammering interconnected tubular members into the ground, such as onshore land, for exploration and production of oil and gas wells, the tubular members being interconnected via a threaded connection according to the invention, wherein the method includes hammering the interconnected tubular members after reaching the final composition of the threaded connection, and during hammering, a pin member being positioned on top of a sleeve member.

[0089] Brief description of the invention

[0090] Embodiments of the threaded connection and method according to the present invention will be described by way of example only with reference to the accompanying schematic diagrams, wherein corresponding reference numerals denote corresponding parts, and wherein:

[0091] Figure 1A A cross-sectional view schematically illustrating an embodiment of a threaded connection pin member according to the present invention is shown.

[0092] Figure 1B schematically shown Figure 1A Enlarged view of the pin thread portion and pin head portion of the pin component.

[0093] Figure 1C and Figure 1D schematically shown Figure 1A Enlarged view of the same portion of the pin thread and the outer shoulder of the pin component.

[0094] Figure 1E schematically shown Figure 1A A further enlarged view of the pin thread portion of the pin component.

[0095] Figure 2A A cross-sectional view schematically illustrating an embodiment of a threaded sleeve member according to the present invention is shown.

[0096] Figure 2B schematically shown Figure 2A Enlarged view of the sleeve thread portion and the inner shoulder portion of the sleeve component.

[0097] Figure 2C and Figure 2D schematically shown Figure 2A Enlarged view of the threaded portion of the sleeve component and the identical portion of the sleeve head.

[0098] Figure 2E schematically shown Figure 2A A further enlarged view of the threaded portion of the sleeve component.

[0099] Figure 3A The schematic diagram illustrates the connection to the tubular member. Figures 1A-1E pin components and Figures 2A-2EThe cross-sectional view of the sleeve component.

[0100] Figure 3B This schematically illustrates the invention and includes... Figure 3A A cross-sectional view of an embodiment of a threaded connection between a pin component and a sleeve component.

[0101] Figure 3C schematically shown Figure 3B Enlarged view of the engaging pin thread portion and sleeve thread portion of the threaded connection.

[0102] Figure 3D schematically shown Figure 3B Enlarged view of the outer shoulder and sleeve head of the threaded connection.

[0103] Figure 3E schematically shown Figure 3B Enlarged view of the inner shoulder and pin head of the threaded connection, and

[0104] Figure 3F schematically shown Figure 3B An alternative embodiment of the engagement of the pin thread portion and the sleeve thread portion of the threaded connection.

[0105] Detailed description of the invention

[0106] An embodiment of the threaded connection 1 according to the present invention is shown in Figures 3A-3E As shown in the figure. The threaded connection 1 includes Figures 1A-1E The pin component 5 shown is Figures 2A-2E The sleeve component 9 is shown. The threaded connection 1 is configured to hammer the interconnected tubular components 2 into the ground, such as onshore soil, for the exploration and production of oil and gas wells.

[0107] Figures 1A-1E A cross-sectional view of the pin member 5 of the threaded connection 1 is shown. When viewed along the central axis 24, the pin member 5 includes an outer shoulder 6, a pin head 7, and a tapered pin thread portion 8 located between the outer shoulder 6 and the pin head 7.

[0108] The outer shoulder 6 includes a first outer shoulder surface 61, a second outer shoulder surface 62, and a shoulder retaining surface 63. The first outer shoulder surface 61 is located at a first radial shoulder distance Drs1 from the central axis 24 and a first axial shoulder distance Das1 from the pin thread portion 8 (see [reference]). Figure 1DThe second outer shoulder surface 62 is located at a second radial shoulder distance Drs2 from the central axis 24 and a second axial shoulder distance Das2 from the pin thread portion 8. The first radial shoulder distance Drs1 is greater than the second radial shoulder distance Drs2. The first axial shoulder distance Das1 is less than the second axial shoulder distance Das2. The complete first outer shoulder surface 61 is located at a greater radial distance from the central axis 24 than the second outer shoulder surface 62, and the complete first outer shoulder surface 61 is located at a smaller axial distance from the pin thread portion 8 than the second outer shoulder surface 62.

[0109] The shoulder retaining surface 63 is located between the first outer shoulder surface 61 and the second outer shoulder surface 62. The shoulder retaining surface 63 is located between the first outer shoulder surface 61 and the second outer shoulder surface 62 when viewed in the axial direction along the central axis 24 and when viewed in the radial direction relative to the central axis 24.

[0110] Figures 2A-2E A cross-sectional view of the sleeve member 9 of the threaded connection 1 is shown. When viewed along the central axis 24, the sleeve member 9 includes an inner shoulder 10, a sleeve head 11, and a tapered sleeve thread portion 12 located between the inner shoulder 10 and the sleeve head 11.

[0111] The sleeve head 11 includes a first sleeve head surface 81, a second sleeve head surface 82, and a sleeve retaining surface 83. The first sleeve head surface 81 is located at a first radial sleeve distance Drb1 from the central axis 24 and a first axial sleeve distance Dab1 from the sleeve thread portion 12 (see [reference]). Figure 2D The second sleeve head surface 82 is located at a second radial sleeve distance Drb2 from the central axis 24 and a second axial sleeve distance Dab2 from the sleeve thread portion 12. The first radial sleeve distance Drb1 is greater than the second radial sleeve distance Drb2. The first axial sleeve distance Dab1 is less than the second axial sleeve distance Dab2. The complete first sleeve head surface 81 is located at a greater radial distance from the central axis 24 than the second sleeve head surface 82, and the complete first sleeve head surface 81 is located at a smaller axial distance from the sleeve thread portion 12 than the second sleeve head surface 82.

[0112] The sleeve retaining surface 83 is located between the first sleeve head surface 81 and the second sleeve head surface 82. The sleeve retaining surface 83 is located between the first sleeve head surface 81 and the second sleeve head surface 82 when viewed in the axial direction along the central axis 24 and when viewed in the radial direction relative to the central axis 24.

[0113] The first outer shoulder surface 61 and the first sleeve head surface 81 extend perpendicularly to the central axis 24 of the threaded connection 1. This is beneficial for maintaining the structural integrity of the threaded connection 1 when the first outer shoulder surface 61 and the first sleeve head surface 81, which are in contact with each other in the final assembly 16, transmit forces during hammering.

[0114] The second outer shoulder surface 62 and the second sleeve head surface 82 extend perpendicularly to the central axis 24 of the threaded connection 1. This helps to maintain the structural integrity of the threaded connection 1 even when the second outer shoulder surface 62 and the second sleeve head surface 82 come into contact with each other during hammering.

[0115] Figure 1D and Figure 2D The first outer shoulder surface 61 extends at an angle λ1 of 90 degrees relative to the central axis 24, the first sleeve head surface 81 extends at an angle δ1 of 90 degrees relative to the central axis 24, the second outer shoulder surface 62 extends at an angle λ2 of 90 degrees relative to the central axis 24, and the second sleeve head surface 82 extends at an angle δ2 of 90 degrees relative to the central axis 24. Angles λ1, λ2, δ1, and δ2 are shown relative to a virtual parallel line 70 extending parallel to the central axis 24.

[0116] The shoulder retaining surface 63 extends at an angle φ relative to the central axis 24 of the threaded connection 1, the angle φ being between and including 5 degrees and 11 degrees. Figure 1D A virtual parallel line 70 extending parallel to the central axis 24 is shown in the middle. The sleeve retaining surface 83 extends at an angle ε relative to the central axis 24 of the threaded connection 1, the angle ε being between and including 5 degrees and 11 degrees. Figure 2D The virtual parallel line 70 extending parallel to the central axis 24 is shown in the middle.

[0117] The pin thread portion 8 and the sleeve thread portion 12 are configured to engage with each other during rotation of the threaded connection 1 (see...). Figure 3B ). Pin thread section 8 (see) Figure 1E ) and sleeve thread portion 12 (see Figure 2E This includes a hook-shaped thread 13, which, in the final assembly 16 of the threaded connection 1, provides radial interference between the crest 14 of the pin thread portion 8 and the root 15 of the sleeve thread portion 12, and between the crest 14 of the sleeve thread portion 12 and the root 15 of the pin thread portion 8 (see...). Figure 3C ).

[0118] In an alternative embodiment of the threaded connection 1 according to the invention, the hook thread 13, when finally assembled 16, provides radial interference only between the crest 14 of the pin thread portion 8 and the root 15 of the sleeve thread portion 12, or only between the crest 14 of the sleeve thread portion 12 and the root 15 of the pin thread portion 8. The latter alternative embodiment... Figure 3F As shown in the figure. The embodiment includes a gap between the crest 14 of the pin thread portion 8 and the root 15 of the sleeve thread portion 12.

[0119] The hook-shaped thread 13 has a positive engagement flank angle at the engagement side 18 and a negative bearing flank angle at the bearing side 17. In the final assembly 16 of the threaded connection 1, the facing bearing sides 17 of the hook-shaped threads 13 of the pin thread portion 8 and the sleeve thread portion 12 are in contact with each other, and the facing engagement sides 18 of the hook-shaped threads 13 of the pin thread portion 8 and the sleeve thread portion 12 are located at a distance 19 from each other (see...). Figure 3C ).

[0120] The pin component 5 includes an inner pin guide surface 93 located between the pin thread portion 8 and the pin head 7, and an outer pin guide surface 94 located between the pin thread portion 8 and the outer shoulder 6. The inner pin guide surface 93 is provided at the pin lip 31 of the pin component 5.

[0121] The sleeve component 9 includes an inner sleeve guide surface 95 located between the sleeve thread portion 12 and the inner shoulder 10, and an outer sleeve guide surface 96 located between the sleeve thread portion 12 and the sleeve head 11. The outer sleeve guide surface 96 is disposed on the sleeve lip 30 of the sleeve component 9.

[0122] The inner pin guide surface 93 and the inner sleeve guide surface 95 are configured to move along each other during assembly and face each other in the final assembly 16. The outer pin guide surface 94 and the outer sleeve guide surface 96 are configured to move along each other during assembly and face each other in the final assembly 16.

[0123] In the final assembly 16, threaded connection 1 has no seal between the engaging pin thread portion 8 and the sleeve thread portion 12 and the pin head 7. The unsealed area is indicated by reference numeral 22. In the illustrated embodiment, threaded connection 1 also has no seal between the engaging pin thread portion 8 and the sleeve thread portion 12 and the sleeve head 11 in the final assembly 16.

[0124] The sleeve head 11 contacts the outer shoulder 6 in the final component 16 of the threaded connection 1 (see...). Figure 3D The first outer shoulder surface 61 and the first sleeve head surface 81 are in contact with each other in the final assembly 16 of the threaded connection 1. In the final assembly 16 of the threaded connection 1, the second sleeve head surface 82 is located at an outer shoulder distance 25 from the second outer shoulder surface 62.

[0125] The fact that the threaded connection 1 is configured to have a sleeve head 11 (more specifically, a first sleeve head surface 81) in the final assembly 16 that contacts the outer shoulder 6 (more specifically, the first outer shoulder surface 61) allows for the determination of when the final assembly 16 is complete by checking whether the sleeve head 11 is in contact with the outer shoulder 6 during the rotational assembly of the threaded connection 1. This is an effective and efficient way to determine when the final assembly 16 of the threaded connection 1 has been reached. This check can be performed using a suitable clearance gauge.

[0126] For a threaded connection 1 to be hammered, achieving the correct configuration of the final assembly 16 is crucial to ensure that the impact force generated by the hammering is transmitted from the pin member 5 to the sleeve member 9 along the correct path. If the threaded connection 1 is hammered into the ground without the outer shoulder 6 and the sleeve head 11 contacting each other, the impact force generated during hammering will be transmitted primarily from the pin member 5 to the sleeve member 9 through the engaging pin thread portion 8 and sleeve thread portion 12. This creates a high risk that the pin thread portion 8 and sleeve thread portion 12 will be damaged, for example, by wear and plastic deformation.

[0127] In use, after the final component 16 of the threaded connection 1 is reached, the tubular members interconnected via the threaded connection 1 are hammered into the ground. As previously stated, this is to ensure that the impact force caused by the hammering is transmitted from the pin member 5 to the sleeve member 9 along the correct path. During hammering, the pin member 5 is positioned at the top of the sleeve member 9. In this case, the impact force is transmitted from the pin member 5 to the sleeve member 9 primarily through the contacting outer shoulder 6 and the sleeve head 11. The fact that the impact force caused by the hammering first moves through the outer shoulder 6 in contact with the sleeve head 11 provides a relevant degree of protection against the impact force to the engaging pin thread portion 8 and sleeve thread portion 12.

[0128] Because the first outer shoulder surface 61 and the first sleeve head surface 81 are further radially away from the threaded portions 8 and 12 than the second outer shoulder surface 62 and the second sleeve head surface 82, the impact force during hammering is transmitted through the threaded connection 1 at the increased radial distance from the threaded portions 8 and 12. This provides an additional degree of protection against impact forces for the engaging threaded portions 8 and 12.

[0129] The shoulder retaining surface 63 and the sleeve retaining surface 83 face each other during the final tightening 16 of the threaded connection 1. The shoulder retaining surface 63 and the sleeve retaining surface 83 are configured to prevent radial movement of the sleeve head 11 away from the central axis 24. The shoulder retaining surface 63 and the sleeve retaining surface 83 provide further protection against damage caused by overpressure within the threaded connection 1. The shoulder retaining surface 63 and the sleeve retaining surface 83 prevent deformation due to overpressure within the threaded connection 1 by locking the sleeve head 11 and preventing outward displacement. Preventing radial movement of the sleeve head 11 away from the central axis 24 is crucial for maintaining the structural integrity of the threaded connection 1 required for hammering. Furthermore, such radial movement of the sleeve head 11 could damage the last engaging teeth of the meshing thread portions 8 and 12.

[0130] The first outer shoulder surface 61 and the first sleeve head surface 81 have an axial interference of less than or equal to 0.2 mm in the final assembly 16 of the threaded connection 1. In the final assembly 16 of the threaded connection 1, the outer shoulder distance 25 between the second outer shoulder surface 62 and the second sleeve head surface 82 is less than or equal to 0.3 mm. The outer shoulder distance 25 is measured in the axial direction along the central axis 24.

[0131] In the final component 16 of the threaded connection 1, the pin head 7 is located at a distance 23 from the inner shoulder of the inner shoulder 10 (see [reference]). Figure 3E This ensures that the impact force of the hammering is primarily transmitted through the threaded connection 1 at the increased radial distance between the first outer shoulder surface 61 and the first sleeve head surface 81. Figure 3B In this configuration, a threaded connection 1 interconnects two tubular members 2, which are connected to a pin member 5 and a sleeve member 9 via a weld 3. A horizontal direction 71 and a vertical direction 72 are shown. The threaded connection 1 is configured to be hammered into the ground after the final assembly 16 is achieved, and during the hammering, the pin member 5 is positioned above the sleeve member 9. In this configuration, the hammering will proceed along... Figure 3B The direction indicated by the middle arrow 4 occurs on the upper tubular member 2. The threaded connection 1 is configured to interconnect tubular members 2 with an outer diameter between 508 mm and 1016 mm and including 508 mm and 1016 mm (between 20 inches and 40 inches and including 20 inches and 40 inches).

[0132] In the final component 16 of the threaded connection 1, the radial interference between the crest 14 of the pin thread portion 8 and the root 15 of the sleeve thread portion 12, and between the crest 14 of the sleeve thread portion 12 and the root 15 of the pin thread portion 8, is less than 0.25 mm, particularly less than 0.2 mm, and more particularly between 0.05 mm and 0.15 mm, including 0.05 mm and 0.15 mm. The radial interference is preferably 0.1 mm. This radial interference enhances the function of the engaging pin thread portion 8 and sleeve thread portion 12 as energy absorption buffers.

[0133] The threaded connection 1 is configured such that, in the final assembly 16 and under a predetermined pressure acting on the threaded connection 1 in the direction of the central axis 24, the pin head 7 and the inner shoulder 10 contact each other, while the facing engagement tooth sides 18 do not contact each other.

[0134] When viewed along the central axis 24, the spacing between the facing engagement teeth 18 is greater than that between the pin head 7 and the inner shoulder 10.

[0135] In this way, the pin head 7 and the inner shoulder 10 protect the engaging pin thread portion 8 and sleeve thread portion 12 from unwanted high impact forces during hammering.

[0136] Tests show that, in the final component 16 of the threaded connection 1, surprisingly good results are achieved when the inner shoulder distance 23 is greater than 0 mm and less than 0.3 mm. Preferably, in the final component 16 of the threaded connection 1, the inner shoulder distance 23 is greater than 0 mm and less than 0.24 mm. These tests also show that, in the final component 16 of the threaded connection 1, surprisingly good results are achieved when the tooth flank distance 19 is between 0.1 mm and 0.25 mm and includes both 0.1 mm and 0.25 mm. The inner shoulder distance 23 and the tooth flank distance 19 are measured axially along the central axis 24.

[0137] The pin member 5 includes a pin member inner surface 38, the sleeve member 9 includes a sleeve member inner surface 39, and the pin member inner surface 38 and the sleeve member inner surface 39 extend flush with each other in the final assembly 16 of the threaded connection 1 (see...). Figure 3B ).

[0138] The inner surface 38 of the pin component and the inner surface 39 of the sleeve component are both located at a radius R1 on the inner component surface, 24 from the central axis (see...). Figure 1A and 2A ).

[0139] The pin member 5 includes a pin tube component 40 having a pin tube component outer surface 41 located at a radius R2 from the central axis 24. The pin member 5 includes a pin member shoulder 33 forming an outer shoulder 6 and located between the pin tube component 40 and the pin thread portion 8. The pin member 5 includes a pin connector component 43 extending from the pin member shoulder 33 to the pin head 7. 2xR2 (R2 multiplied by two) is between 508mm and 1016mm and includes both 508mm and 1016mm (between 20 inches and 40 inches and includes both 20 inches and 40 inches).

[0140] The sleeve component 9 includes a sleeve tube component 44 having a sleeve tube component outer surface 45 located at a radius R3 of the sleeve tube component outer surface at a distance of 24 from the central axis. The sleeve component 9 includes a sleeve component shoulder 46 forming an inner shoulder 10 and located between the sleeve tube component 44 and the sleeve threaded portion 12. The sleeve component 9 includes a sleeve connector component 47 extending from the sleeve component shoulder 46 to the sleeve head 11. 2xR3 (R3 multiplied by two) is between 508 mm and 1016 mm and includes 508 mm and 1016 mm (between 20 inches and 40 inches and includes 20 inches and 40 inches).

[0141] In the final assembly 16, the pin connector component 43 and the sleeve connector component 47 together define an outer connector surface 48 located at an outer connector radius R4 from the central axis 24. The outer connector radius R4 is greater than each of the outer surface radius R2 of the pin component and the outer surface radius R3 of the sleeve component.

[0142] The outer connector radius R4 is between R2+13mm and R2+19mm, and includes both R2+13mm and R2+19mm. The outer connector radius R4 is between R3+13mm and R3+19mm, and includes both R3+13mm and R3+19mm. The outer surface radius R2 of the pin tube component is equal to the outer surface radius R3 of the sleeve tube component.

[0143] A pin transition region 49 with a pin transition radius R5 is located between the outer surface 41 of the pin tube component and the outer connector surface 48. A sleeve transition region 50 with a sleeve transition radius R6 is located between the outer surface 45 of the sleeve tube component and the outer connector surface 48. The pin transition radius R5 is equal to the sleeve transition radius R6. In other examples of the threaded connection according to the invention, the pin transition radius R5 may be greater than the sleeve transition radius R6. The pin transition radius R5 is preferably between 2 mm and 20 mm and includes 2 mm and 20 mm, and the sleeve transition radius R6 is preferably between 2 mm and 8 mm and includes 2 mm and 8 mm.

[0144] The pin member 5 includes an outer pin connector surface 55, and a first outer shoulder surface 61 extends to or adjacent to the outer pin connector surface 55. The sleeve member 9 includes an outer sleeve connector surface 56, and a first sleeve head surface 81 extends to or adjacent to the outer sleeve connector surface 56. The outer pin connector surface 55 and the outer sleeve connector surface 56 together form the outer connector surface 48.

[0145] The pin member 5 and the sleeve member 9 each include a single-step thread 51 formed by the pin thread portion 8 and the sleeve thread portion 12, respectively. This means that there are no additional steps of threads on the threaded connection 1.

[0146] The pin thread portion 8 and the sleeve thread portion 12 preferably extend at a taper angle α relative to the central axis 24, the taper angle α being between and including 6 degrees and 11 degrees (see [link to relevant documentation]). Figure 1B and Figure 2B The cone angle α is measured relative to the centerline 101 of the pin thread portion 8 and the centerline 102 of the sleeve thread portion 12 (see [reference]). Figure 1E and Figure 2E The cone angle α is shown relative to a virtual parallel line 70 extending parallel to the central axis 24. Figure 3B The hammering position of the threaded connection 1 shown in the figure has a virtual parallel line 70 extending in the vertical direction 72.

[0147] The pin thread portion 8 and the sleeve thread portion 12 include multiple threads, which are configured to be formed by rotation between 180 degrees and 360 degrees and including 180 degrees and 360 degrees.

[0148] The inner shoulder 10 includes an inner stop surface 52 in the final assembly 16 facing the pin head stop surface 53 and located at an inner shoulder distance 23. The inner stop surface 52 and the pin head stop surface 53 preferably extend at a stop angle β relative to a virtual vertical line 73 extending perpendicular to the central axis 24 of the threaded connection 1. This stop angle β is between 4 degrees and 12 degrees and includes both 4 degrees and 12 degrees (see [link to documentation]). Figure 1B and Figure 2B ).exist Figure 3B The hammering position of the threaded connection 1 shown in the figure has a virtual vertical line 73 extending in the horizontal direction 71.

[0149] When viewed along the virtual vertical line 73 in a direction away from the central axis 24, the inner stop surface 52 and the pin stop surface 53 are inclined away from the outer shoulder 6.

[0150] The stop angle β of the inner stop surface 52 and the pin stop surface 53 ensures that the pin 7 tends to move toward (rather than away from) the sleeve member 9.

[0151] Detailed embodiments of the invention are disclosed herein as needed; however, it should be understood that the disclosed embodiments are merely examples of the invention, which may be embodied in many forms. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but rather serve as the basis for the claims and as a representative basis for teaching those skilled in the art to apply the invention in various ways in virtually any suitable detailed structure. Furthermore, the terms and phrases used herein are not intended to be limiting, but rather to provide an understandable description of the invention.

[0152] As used herein, the term "a" or "an" is defined as one or more. As used herein, the terms "many" and "a plurality of" are defined as two or more. As used herein, the term "another" is defined as at least a second or more. As used herein, the terms "comprising" and / or "having" are defined as including (i.e., open-ended language, not excluding other elements or steps). Any reference numerals in the claims should not be construed as limiting the scope of the claims or the invention.

[0153] It will be apparent to those skilled in the art that various modifications can be made to the threaded connection and method shown according to the present invention without departing from the scope defined by the claims.

Claims

1. A threaded connector for hammering interconnected tubular components into the ground for exploring and producing oil and gas wells, said threaded connector comprising; - A pin component, comprising an outer shoulder, a pin head, and a tapered pin thread portion located between the outer shoulder and the pin head. - A sleeve component comprising an inner shoulder, a sleeve head, and a tapered sleeve threaded portion located between the inner shoulder and the sleeve head, wherein --The pin thread portion and the sleeve thread portion are configured to engage with each other during rotation of the threaded connection. --The pin thread portion and sleeve thread portion include hook-shaped threads, which, in the final assembly of the threaded connection, provide radial interference between the crest of the pin thread portion and the root of the sleeve thread portion and / or between the crest of the sleeve thread portion and the root of the pin thread portion. --The load-bearing tooth sides of the hook-shaped threads in the pin thread portion and the sleeve thread portion come into contact with each other in the final assembly of the threaded fastener. --The hook-shaped threads of the pin thread portion and the sleeve thread portion are located at a distance from each other's threaded sides in the final assembly of the threaded connection. --In the final assembly, the threaded fastener has no seal between the engaging pin thread portion and the sleeve thread portion and the pin head stop surface. --In the final assembly of the threaded fastener, the sleeve head contacts the outer shoulder. --In the final assembly of the threaded fastener, the pin head stop surface is located at a distance from the inner shoulder of the inner stop surface of the inner shoulder. - In the final assembly of the threaded connection, the central axis is defined. - The outer shoulder includes a first outer shoulder surface, a second outer shoulder surface, and a shoulder retaining surface. - The first outer shoulder surface is located at a distance from the first radial shoulder from the central axis and a distance from the first axial shoulder from the pin thread portion. - The second outer shoulder surface is located at the distance from the second radial shoulder of the central axis and the distance from the second axial shoulder of the pin thread portion. - The first radial shoulder distance is greater than the second radial shoulder distance. - The shoulder distance in the first axis is less than the shoulder distance in the second axis. - The shoulder retaining surface is located between the first outer shoulder surface and the second outer shoulder surface. - The sleeve head includes a first sleeve head surface, a second sleeve head surface, and a sleeve retaining surface. - The surface of the first sleeve head is located at a first radial sleeve distance from the central axis and a first axial sleeve distance from the sleeve thread portion. - The second sleeve head surface is located at the second radial sleeve distance from the central axis and the second axial sleeve distance from the sleeve thread portion. - The first radial sleeve distance is greater than the second radial sleeve distance. - The distance between the first axial sleeve and the second axial sleeve is less than the distance between the two axial sleeves. - The sleeve retaining surface is located between the first sleeve head surface and the second sleeve head surface. - In the final assembly of the threaded connection, the surface of the first outer shoulder and the surface of the first sleeve head are in contact with each other. - In the final assembly of the threaded connection, the surface of the second sleeve head is located at a distance from the outer shoulder of the second outer shoulder surface, and - In the final assembly of a threaded fastener, the shoulder retaining surface and the sleeve retaining surface face each other.

2. The threaded connector according to claim 1, characterized in that, The first outer shoulder surface and the first sleeve head surface extend perpendicular to the central axis of the threaded connection.

3. The threaded connector according to claim 1, characterized in that, The second outer shoulder surface and the second sleeve head surface extend perpendicularly to the central axis of the threaded connection.

4. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connector, the first outer shoulder surface and the first sleeve head surface have an axial interference of less than or equal to 0.2 mm.

5. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connector, the distance between the outer shoulder surfaces of the second outer shoulder and the second sleeve head surface is less than or equal to 0.3 mm.

6. The threaded connector according to any one of claims 1 to 3, characterized in that... ； - The shoulder retaining surface extends at an angle φ relative to the central axis of the threaded connection, said angle φ being between and including 5 degrees and 11 degrees. - The sleeve retaining surface extends at an angle ε relative to the central axis of the threaded connection, said angle ε being between and including 5 degrees and 11 degrees.

7. The threaded connector according to any one of claims 1 to 3, characterized in that, The shoulder retaining surface and the sleeve retaining surface are configured to prevent radial movement of the sleeve head away from the central axis.

8. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly, the threaded connector has no seal between the engaging pin thread portion and the sleeve thread portion and the sleeve head.

9. The threaded connector according to any one of claims 1 to 3, characterized in that... ； - The pin component includes an inner pin guide surface located between the pin thread portion and the pin head, and an outer pin guide surface located between the pin thread portion and the outer shoulder. - The sleeve assembly includes an inner sleeve guide surface located between the sleeve threaded portion and the inner shoulder, and an outer sleeve guide surface located between the sleeve threaded portion and the sleeve head. - The inner pin guide surface and the inner sleeve guide surface are configured to move along each other during assembly and face each other in the final assembly, and - The outer sleeve guide surface and the outer sleeve guide surface are configured to move along each other during assembly and face each other in the final assembly.

10. The threaded connector according to any one of claims 1 to 3, characterized in that, The sleeve component includes an outer sleeve connector surface, and a first sleeve head surface extends to or adjacent to the outer sleeve connector surface.

11. The threaded connector according to any one of claims 1 to 3, characterized in that, The pin member includes an outer pin connector surface, and a first outer shoulder surface extends to or adjacent to the outer pin connector surface.

12. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connection, the radial interference between the crest of the pin thread portion and the root of the sleeve thread portion and / or between the crest of the sleeve thread portion and the root of the pin thread portion is less than 0.25 mm.

13. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connection, the radial interference between the crest of the pin thread portion and the root of the sleeve thread portion and / or between the crest of the sleeve thread portion and the root of the pin thread portion is less than 0.2 mm.

14. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded fastener, the radial interference between the crest of the pin thread portion and the root of the sleeve thread portion and / or between the crest of the sleeve thread portion and the root of the pin thread portion is between 0.05 mm and 0.15 mm, and includes both 0.05 mm and 0.15 mm.

15. The threaded connector according to any one of claims 1 to 3, characterized in that, The threaded connector is configured such that, in the final assembly and under a predetermined pressure acting on the threaded connector in the direction along the central axis, the pin head and the inner shoulder contact each other, while the facing engagement teeth do not contact each other.

16. The threaded connector according to any one of claims 1 to 3, characterized in that, When viewed along the central axis, the spacing between the facing engagement teeth is greater than that between the pin head and the inner shoulder.

17. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connector, the distance between the inner shoulders is greater than 0 mm and less than 0.3 mm.

18. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connector, the distance between the inner shoulders is greater than 0 mm and less than 0.24 mm.

19. The threaded connector according to any one of claims 1 to 3, characterized in that, In the final assembly of the threaded connector, the tooth flank distance is between 0.1 mm and 0.25 mm, and includes both 0.1 mm and 0.25 mm.

20. The threaded connector according to any one of claims 1 to 3, characterized in that, The pin member includes an inner surface of the pin member, the sleeve member includes an inner surface of the sleeve member, and in the final assembly of the threaded connection, the inner surfaces of the pin member and the inner surfaces of the sleeve member extend flush with each other.

21. The threaded connector according to claim 20, characterized in that, The inner surfaces of the pin component and the sleeve component are both located at a radius R1 from the inner surface of the component at a distance from the central axis.

22. The threaded connector according to any one of claims 1 to 3, characterized in that... ； - The pin component includes a pin tube assembly having an outer surface located at a distance R2 from the outer surface of the pin tube assembly from the central axis. - The pin component includes a pin component shoulder, which forms an outer shoulder and is located between the pin tube component and the pin thread portion. - The pin component includes a pin connector part extending from the shoulder of the pin component to the pin head. - The sleeve component includes a sleeve tube component having an outer surface located at a distance R3 from the central axis of the outer surface of the sleeve tube component. - The sleeve component includes a sleeve component shoulder, which forms an inner shoulder and is located between the sleeve tube component and the sleeve threaded portion. - The sleeve component includes a sleeve connector part that extends from the shoulder of the sleeve component to the sleeve head. In the final assembly, the pin connector component and the sleeve connector component together define the outer connector surface, which is located at an outer connector radius R4 from the central axis. - The outer connector radius R4 is greater than each of the outer surface radius R2 of the pin assembly and the outer surface radius R3 of the sleeve assembly.

23. The threaded connector according to claim 22, characterized in that, The radius R4 of the external connector is between R2+13mm and R2+19mm, and includes both R2+13mm and R2+19mm.

24. The threaded connector according to claim 22, characterized in that, The radius R4 of the external connector is between R3+13mm and R3+19mm, and includes both R3+13mm and R3+19mm.

25. The threaded connector according to claim 22, characterized in that, The outer surface radius R2 of the pin tube component is equal to the outer surface radius R3 of the sleeve tube component.

26. The threaded connector according to any one of claims 1 to 3, characterized in that... ； - The pin transition area with a pin transition radius R5 is located between the outer surface of the pin tube component and the surface of the outer connector. - The sleeve transition area with a sleeve transition radius of R6 is located between the outer surface of the sleeve tube component and the surface of the outer connector, and - The transition radius of the pin, R5, is equal to or greater than the transition radius of the sleeve, R6.

27. The threaded connector according to claim 26, characterized in that, The pin transition radius R5 is between 2mm and 20mm and includes 2mm and 20mm, and the sleeve transition radius R6 is between 2mm and 8mm and includes 2mm and 8mm.

28. The threaded connector according to any one of claims 1 to 3, characterized in that, The pin component and the sleeve component include single-pass threads formed by the pin thread portion and the sleeve thread portion, respectively.

29. The threaded connector according to any one of claims 1 to 3, characterized in that, The pin thread portion and the sleeve thread portion extend at a cone angle α relative to the central axis, the cone angle α being between 6 degrees and 11 degrees and including both 6 degrees and 11 degrees.

30. The threaded connector according to any one of claims 1 to 3, characterized in that, The pin thread portion and the sleeve thread portion include multiple threads, which are configured to be formed by rotation between and including 180 degrees and 360 degrees.

31. The threaded connector according to any one of claims 1 to 3, characterized in that, The inner shoulder includes a pin head stop surface facing the pin head in the final assembly and an inner stop surface located at the inner shoulder distance, and the inner stop surface and the pin head stop surface extend at a stop angle β relative to the central axis of the threaded connection, the stop angle β being between 4 degrees and 12 degrees and including 4 degrees and 12 degrees.

32. The threaded connector according to any one of claims 1 to 3, characterized in that, The threaded connector is configured to achieve final assembly during rotational assembly when contact is achieved between the first sleeve head surface and the first outer shoulder surface.

33. The threaded connector according to any one of claims 1 to 3, characterized in that, The threaded connector is configured to be hammered into the ground after the final assembly is achieved, and during the hammering, the pin member is positioned on top of the sleeve member.

34. The threaded connector according to any one of claims 1 to 3, characterized in that, The pin component includes a pin tube component having an outer surface located at a radius R2 from the central axis, and 2×R2 being between 508 mm and 1016 mm and including both 508 mm and 1016 mm.

35. The threaded connector according to any one of claims 1 to 3, characterized in that, The sleeve component includes a sleeve tube component having an outer surface of the sleeve tube component located at a radius R3 of the outer surface of the sleeve tube component from the central axis, and 2×R3 is between 508mm and 1016mm and includes 508mm and 1016mm.

36. The threaded connector according to any one of claims 1 to 3, characterized in that, The threaded connector is configured to have an outer diameter between 508 mm and 1016 mm, and includes both 508 mm and 1016 mm.

37. The threaded connector according to any one of claims 1 to 3, characterized in that, The ground described is terrestrial land.

38. A method for hammering interconnected tubular members into the ground to explore and produce oil and gas wells, said tubular members being interconnected via threaded connectors according to any one of the preceding claims, characterized in that, The method includes hammering interconnected tubular members after the final assembly of the threaded connector is reached, and during hammering, a pin member is positioned on top of a sleeve member.

39. The method for hammering interconnected tubular components into the ground to explore and produce oil and gas wells according to claim 38, characterized in that, The ground described is terrestrial land.

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