Compression-resistant structure for non-magnetic drill collar

Abstract

The pressure-resistant structure comprises a drill collar body, a top connecting part is arranged at the top end of the drill collar body, a bottom connecting part is arranged at the bottom end of the drill collar body, a concave part is arranged on the outer surface of the drill collar body, and a pressure-resistant strengthening layer is arranged in the concave part. The drill collar body is internally provided with a compression-resistant supporting structure, the compression-resistant supporting structure comprises a plurality of supporting ribs, the supporting ribs are tightly connected with the inner wall of the drill collar body, the compression-resistant reinforcing layer is of a one-layer or multi-layer structure, the multiple supporting ribs are arranged in the direction parallel to the axis of the drill collar body, and the multiple supporting ribs are tightly connected with the inner wall of the drill collar body. The multiple supporting ribs are arranged around the axis of the drill collar body in a circumferential mode, the drill collar body is made of a low-carbon high-chromium-manganese alloy steel material, and the compression-resistant strengthening layer is welded to the outer side of the drill collar body in a surfacing mode. The non-magnetic drill collar can better resist pressure and friction force from a stratum.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling equipment, and in particular relates to a pressure-resistant structure for a non-magnetic drill collar. Background Art

[0002] In the process of geological exploration, drill collars, as key components connecting drill bits and drill pipes, need to withstand huge pressure and friction from the formation. Especially in some specific drilling environments, such as magnetic measurement operations, the performance requirements of drill collars are more stringent. Non-magnetic drill collars are widely used in the protection of magnetic measurement instruments due to their special non-magnetic characteristics to ensure the accuracy of measurement data.

[0003] The original intention of the design of non-magnetic drill collars is to avoid the influence of magnetic interference on the accuracy of measurement results during the drilling process. Its non-magnetic characteristics enable magnetic measuring instruments to work normally during the drilling process, providing reliable data support for geological exploration. However, although non-magnetic drill collars have significant advantages in the field of magnetic measurement, they have certain shortcomings in terms of compressive resistance.

[0004] In drilling operations, drill collars, as key components connecting the drill bit and the drill pipe, are subjected to tremendous pressure and friction from the strata. Especially when encountering hard strata or complex geological conditions, such as hard rock, faults, karst, etc., this pressure and friction will increase exponentially, placing extremely high demands on the compression resistance of the drill collars. However, the currently widely used non-magnetic drill collars are still weak in terms of compression resistance. Due to the limitations of their design concepts and manufacturing processes, non-magnetic drill collars often experience performance degradation and shortened service life when facing complex and harsh drilling environments. This not only affects the efficiency and safety of drilling operations, but may also lead to the failure of drilling operations, causing huge economic losses to companies and individuals.

[0005] In order to solve this problem, the utility model provides a pressure-resistant structure for a non-magnetic drill collar, which can effectively improve the pressure resistance of the non-magnetic drill collar, extend its service life, and improve the efficiency and safety of drilling operations.

[0006] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure-resistant structure for a non-magnetic drill collar, comprising a drill collar body, a top connection portion is provided at the top of the drill collar body, a bottom connection portion is provided at the bottom end of the drill collar body, a recess is provided on the outer surface of the drill collar body, a pressure-resistant strengthening layer is provided inside the recess, a pressure-resistant support structure is provided inside the drill collar body, the pressure-resistant support structure comprises a plurality of support ribs, and the support ribs are tightly connected to the inner wall of the drill collar body.

[0008] As a preferred technical solution of the utility model, the compression strengthening layer is provided with one or more layers.

[0009] As a preferred technical solution of the utility model, the plurality of support ribs are arranged parallel to the axis direction of the drill collar body, and the plurality of support ribs are arranged in a circle around the axis of the drill collar body.

[0010] As a preferred technical solution of the utility model, the drill collar body is made of low-carbon high-chromium-manganese alloy steel material.

[0011] As a preferred technical solution of the utility model, the compression strengthening layer is welded to the outer side of the drill collar body by surfacing.

[0012] As a preferred technical solution of the utility model, the compression strengthening layer is made of a high-strength, high-toughness wear-resistant metal material.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) Improved compressive performance: A multi-layer surfacing design is adopted. Through the setting of compressive strengthening layer and compressive support structure, the non-magnetic drill collar can better resist the pressure and friction from the formation, and improve its stability in high-pressure and high-depth drilling environment.

[0015] (2) Extending service life: The introduction of the pressure-resistant structure reduces the wear and deformation of the drill collar body, thereby extending the service life of the non-magnetic drill collar.

[0016] (3) Improve drilling efficiency: The compressive resistance of non-magnetic drill collars is improved, making drilling operations more stable and smooth, improving drilling efficiency and providing more stable and reliable equipment support for drilling operations.

[0017] (4) Ensure the accuracy of measurement data: The stability and durability of non-magnetic drill collars are enhanced, which is conducive to protecting magnetic measuring instruments from interference and ensuring the accuracy of measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a vertical cross-sectional view of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] In the figure: 1. drill collar body; 2. top connection; 3. bottom connection; 4. compression strengthening layer; 5. support ribs; 6. recessed portion. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0023] See also Figure 1-2 The utility model provides the following technical solutions: a pressure-resistant structure for a non-magnetic drill collar, comprising a drill collar body 1, the drill collar body 1 is made of a low-carbon high-chromium-manganese alloy steel material, and the low-carbon high-chromium-manganese alloy steel material has good low magnetic permeability and high-strength mechanical properties; a top connection part 2 is arranged at the top of the drill collar body 1, and the top connection part 2 is used to connect the drill rod, and a bottom connection part 3 is arranged at the bottom end of the drill collar body 1, and the bottom connection part 3 is used to connect the drill bit; a recessed part 6 is arranged on the outer surface of the drill collar body 1, and one or more layers of pressure-resistant strengthening layers 4 are arranged inside the recessed part 6, and the pressure-resistant strengthening layer 4 is made of a high-strength, high-toughness wear-resistant metal material, and the pressure-resistant strengthening layer 4 is provided with one or more layers of structure, which can effectively resist the pressure and friction from the formation and protect the drill collar body 1 from damage; the pressure-resistant structure The strengthening layer 4 is welded to the outside of the drill collar body 1 by surfacing welding. The metal surface hardness of the surfacing welding method is higher, which can effectively improve the service life. At the same time, the surface of the drill collar after surfacing welding is heated and cooled, and the metal crystal changes occur in the melting process, thereby improving the wear resistance; in order to further improve the compressive performance, a compressive support structure is arranged inside the drill collar body 1, and the compressive support structure includes a plurality of support ribs 5, and the plurality of support ribs 5 are arranged parallel to the axial direction of the drill collar body 1, and the plurality of support ribs 5 are arranged in a circle around the axis of the drill collar body 1, and the support ribs 5 are tightly connected to the inner wall of the drill collar body 1 to form a stable support system. This design can effectively disperse the pressure from the formation, reduce the stress concentration of the drill collar body 1, and thus improve its compressive strength.

[0024] In specific implementation, the material and thickness of the compression strengthening layer 4, as well as the layout and size of the compression support structure, can be adjusted according to actual needs to achieve the best compression resistance effect. At the same time, other technical means, such as heat treatment, surface treatment, etc., can also be combined to further optimize the performance of the non-magnetic drill collar.

[0025] Finally, it should be noted that in the present utility model, unless otherwise clearly stipulated and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0026] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressure-resistant structure for a non-magnetic drill collar, comprising a drill collar body (1), characterized in that: The top of the drill collar body (1) is provided with a top connection portion (2), the bottom of the drill collar body (1) is provided with a bottom connection portion (3), the outer surface of the drill collar body (1) is provided with a recessed portion (6), a compressive strengthening layer (4) is provided inside the recessed portion (6), and a compressive support structure is provided inside the drill collar body (1), the compressive support structure comprises a plurality of support ribs (5), and the support ribs (5) are tightly connected to the inner wall of the drill collar body (1).

2. The compression-resistant structure for a non-magnetic drill collar according to claim 1, characterized in that: The compression-resistant strengthening layer (4) is provided with a single-layer or multi-layer structure.

3. The compression-resistant structure for a non-magnetic drill collar according to claim 1, characterized in that: The plurality of support ribs (5) are all arranged parallel to the axis direction of the drill collar body (1), and the plurality of support ribs (5) are arranged in a circle around the axis of the drill collar body (1).

4. The compression-resistant structure for a non-magnetic drill collar according to claim 3, characterized in that: The drill collar body (1) is made of low-carbon high-chromium manganese alloy steel material.

5. The compression-resistant structure for a non-magnetic drill collar according to claim 1, characterized in that: The compression strengthening layer (4) is welded to the outside of the drill collar body (1) by surfacing.

6. The compression-resistant structure for a non-magnetic drill collar according to claim 1, characterized in that: The compression strengthening layer (4) is made of a high-strength, high-toughness, wear-resistant metal material.

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