Clamp spring with T-shaped groove

Abstract

The utility model relates to the technical field of drilling for geological exploration, in particular to a clamp spring with a T-shaped groove, which comprises a conical annular clamp spring body with a wide upper part and a narrow lower part, a first opening vertically penetrating through the whole body and a second opening distributed on the body are axially arranged on the body, and the upper end of the second opening penetrates to the upper end face of the body; the body is further provided with a third opening, and the third opening is matched with the second opening to form a T-shaped inward contraction stress structure in a penetrating mode. A vertical groove is formed in the inner wall of the body, and a side V-shaped metal blocking piece is arranged in the vertical groove in a matched mode. A T-shaped inward contraction stress structure is adopted at the upper end of the clamp spring, so that the clamp spring can have larger inward contraction amount, and further larger grabbing force is provided; the side V-shaped metal blocking pieces are matched to be circumferentially polymerized and embedded into the surface of the rock core at the same time, the hard and smooth rock core can be tightly buckled, and the rock coring effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling for geological exploration, in particular to a clamping spring with a T-shaped groove. Background Art

[0002] In the process of geological exploration, the retaining spring is one of the key components for extracting cores in rope coring drilling. When the inner tube is filled with cores, the vertical axis of the drill rig moves upward, driving the inner tube in the drill pipe to move upward, causing the inner tube, retaining spring seat and retaining spring to move relative to each other. The retaining spring holds and breaks the core, and then the core can be successfully fished out with a salvage device.

[0003] The Chinese patent that has been published, with the publication number CN204920870U, discloses a core extraction spring for thin-walled drilling tools, which is used for rope coring drilling and belongs to the field of drilling technology for geological exploration. The technical scheme is: comprising a spring body (1), an axial notch 1 (2), an axial notch 2 (3) and an anti-slip thread (4), the spring body (1) is a conical ring structure, the inner wall of the spring body (1) is provided with an anti-slip thread (4) along the circumferential direction, the anti-slip thread (4) is in a fish scale shape, the spring body (1) is provided with an axial notch 1 (2) that penetrates the entire spring body (1) and 3-5 axial notches 2 (3) that do not penetrate the entire spring body (1), and the 3-5 axial notches 2 (3) that do not penetrate the entire spring body (1) are evenly arranged along the circumferential direction of the spring body (1).

[0004] The retaining spring disclosed in the above patent has an axial notch 2 on the retaining spring body which can increase the amount of inward contraction, but it will still slip when coring hard rocks and fail to hold the core, causing the core to slide to the bottom of the hole. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a retaining spring with a T-slot, which is used to solve the problem that the retaining spring used in the prior art has insufficient inward contraction and still slips when encountering hard rock coring.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides a T-slotted retaining spring, comprising a tapered annular retaining spring body that is wide at the top and narrow at the bottom, and a first opening that vertically penetrates the entire body is provided on the body along the axial direction, so as to increase the inward contraction amount of the entire body;

[0007] The body is provided with a second opening, which is vertically distributed on the body and the upper end of which passes through the upper end surface of the body, so as to increase the inward contraction amount of the upper end of the body;

[0008] The body is also provided with a third opening, which is laterally distributed on the body, and the lower end of the second opening is connected to the third opening, forming a T-shaped inward contraction force-bearing structure; further increasing the inward contraction amount of the upper end of the body;

[0009] The inner wall of the body is provided with a vertical groove, in which a side V-shaped metal baffle is matched, and the upper end of the side V-shaped metal baffle extends to the upper part of the body for polymerizable buckling of the rock core.

[0010] In one embodiment of the present invention, at least five T-shaped inwardly contracting force-bearing structures are provided, and the plurality of T-shaped inwardly contracting force-bearing structures are equidistantly arranged on the main body.

[0011] In one embodiment of the present invention, a side V-shaped metal blocking piece is provided on the body between adjacent T-shaped inwardly contracting force-bearing structures.

[0012] In an embodiment of the present invention, the bending part of the side V-shaped metal baffle corresponds horizontally to the upper end surface of the body.

[0013] In an embodiment of the present invention, the side V-shaped metal baffle is connected to the vertical groove of the main body by using rivets.

[0014] In an embodiment of the present invention, an anti-slip thread is further provided on the inner wall of the body.

[0015] As described above, the clamping spring with T-slot of the utility model has the following beneficial effects:

[0016] 1. By setting a third opening distributed laterally on the body, the third opening cooperates with the second opening to form a T-shaped inward contraction force-bearing structure on the clamping spring body. When the upper end of the clamping spring is tightened circumferentially, the second opening and the third opening are compressed in turn, and the clamping spring can have a larger inward contraction amount to provide a greater gripping force for hard rock cores;

[0017] 2. By setting the side V-shaped metal baffle, when the retaining spring body contracts inward, the upper end of the side V-shaped metal baffle can be circumferentially aggregated and embedded into the core surface, thereby tightly holding the hard and smooth core, reducing the possibility of the core slipping and improving the coring effect;

[0018] 3. The retaining spring with T-slot provided by the utility model adopts a T-shaped inward contraction force-bearing structure at the upper end of the retaining spring, so that the retaining spring can have a larger inward contraction amount, thereby providing a larger gripping force; the V-shaped metal baffle on the side is simultaneously circumferentially aggregated and embedded in the core surface, which can tightly hold the hard and smooth core and improve the rock coring effect; the overall design is reasonable, the structure is compact, and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1Shown is a schematic diagram of the structure disclosed by the utility model.

[0020] Component number description

[0021] Main body 1; first opening 2; second opening 3; third opening 4; vertical groove 5; side V-shaped metal baffle 6; anti-slip thread 7. DETAILED DESCRIPTION

[0022] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] See also Figure 1 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0024] See also Figure 1 The utility model provides a retaining spring with a T-slot, comprising a tapered annular retaining spring body 1 which is wide at the top and narrow at the bottom. A first opening 2 which vertically penetrates the entire body 1 is axially provided on the body 1, so as to increase the inward contraction amount of the body 1 as a whole; an anti-slip thread 7 is also provided on the inner wall of the body 1, so as to improve the grip of the retaining spring on the core.

[0025] The main body 1 is provided with a second opening 3, which is vertically distributed on the main body 1 and the upper end of the second opening 3 passes through the upper end surface of the main body 1, so as to increase the inward contraction amount of the upper end of the main body 1; the main body 1 is also provided with a third opening 4, which is horizontally distributed on the main body 1 and the lower end of the second opening 3 passes through the third opening 4, so as to form a T-shaped inward contraction force-bearing structure, and at least five T-shaped inward contraction force-bearing structures are provided, and a plurality of T-shaped inward contraction force-bearing structures are equidistantly arranged on the main body 1; when the upper end of the retaining spring is circumferentially tightened, the second opening and the third opening are compressed in turn, and the retaining spring can have a larger inward contraction amount to provide a greater gripping force for the hard core, thereby increasing the circumferential holding force of the retaining spring to hold the core tightly.

[0026] The inner wall of the main body 1 is provided with a vertical groove 5, and a side V-shaped metal baffle 6 is matched in the vertical groove 5. The upper end of the side V-shaped metal baffle 6 extends to the top of the main body 1, and the bending part of the side V-shaped metal baffle 6 corresponds horizontally to the upper end surface of the main body 1; when the clamp body 1 is tightened, the upper end of the main body 1 squeezes the bending part of the side V-shaped metal baffle 6, and since the lower end of the side V-shaped metal baffle 6 has been fixed, the upper end of the side V-shaped metal baffle 6 will move upward and buckle into the rock. And a side V-shaped metal baffle 6 is provided on the main body 1 between the adjacent T-shaped inward contraction force-bearing structures; when the clamp body 1 contracts inward, the upper end of the side V-shaped metal baffle 6 can be circumferentially aggregated and embedded in the core surface, thereby tightly buckling the hard and smooth core, reducing the possibility of the core slipping and improving the coring effect.

[0027] The side V-shaped metal baffle 6 is connected to the vertical groove 5 of the main body 1 by rivets; the method of assembling the side V-shaped metal baffle 6 by rivets is easy to operate, has reliable force transmission, and the quality of the rivet connection is easy to check; the processing of the retaining ring into a forming mold does not require major changes, thereby reducing manufacturing costs.

[0028] In summary, the clamping spring with T-slot provided by the utility model adopts a T-shaped inward contraction force structure at the upper end of the clamping spring, so that the clamping spring can have a larger inward contraction amount, thereby providing a greater gripping force; the side V-shaped metal baffle 6 is simultaneously circumferentially aggregated and embedded in the core surface, which can tightly hold the hard and smooth core and improve the rock coring effect; the overall design is reasonable, the structure is compact, and the practicality is high. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A retaining spring with a T-slot, comprising a conical annular retaining spring body (1) which is wide at the top and narrow at the bottom, wherein a first opening (2) which vertically penetrates the entire body (1) is provided on the body (1) along the axial direction, and is used to increase the inward contraction amount of the entire body (1); The body (1) is provided with a second opening (3), which is vertically distributed on the body (1) and the upper end of the second opening (3) passes through the upper end surface of the body (1), so as to increase the inward contraction amount of the upper end of the body (1); Features: The body (1) is also provided with a third opening (4), which is distributed transversely on the body (1), and the lower end of the second opening (3) is connected to the third opening (4), forming a T-shaped inwardly contracting force-bearing structure, further increasing the inward contraction amount of the upper end of the body (1); The inner wall of the body (1) is provided with a vertical groove (5), in which a side V-shaped metal baffle (6) is matched, and the upper end of the side V-shaped metal baffle (6) extends to the top of the body (1) and is used for polymerizing and fastening the rock core.

2. The T-slotted retaining ring according to claim 1, characterized in that: At least five T-shaped inwardly contracting force-bearing structures are provided, and a plurality of T-shaped inwardly contracting force-bearing structures are equidistantly arranged on the main body (1).

3. The T-slotted retaining ring according to claim 2, characterized in that: A side V-shaped metal blocking sheet (6) is provided on the body (1) between adjacent T-shaped inwardly contracting force-bearing structures.

4. The T-slotted retaining ring according to claim 3, characterized in that: The bending part of the side V-shaped metal baffle (6) corresponds horizontally to the upper end surface of the main body (1).

5. The T-slotted retaining ring according to claim 3, characterized in that: The side V-shaped metal baffle (6) is connected to the vertical groove (5) of the body (1) by means of rivets.

6. The T-slotted retaining spring according to claim 1, characterized in that: The inner wall of the body (1) is also provided with anti-slip threads (7).

Images