Sleeve

Abstract

The utility model discloses a casing pipe, which relates to the technical field of drilling casing pipes and comprises at least two casing pipe main bodies, a plurality of positioning bolts are fixedly distributed at the tail ends of the casing pipe main bodies around the axis of the casing pipe main bodies, and a plurality of elastic clamping plates are fixedly distributed at the head ends of the casing pipe main bodies around the axis of the casing pipe main bodies. The number of the elastic clamping plates is equal to that of the positioning bolts, and positioning holes are formed in the elastic clamping plates; the casing pipe bodies are sequentially arranged from bottom to top, any two adjacent casing pipe bodies are the first casing pipe body and the second casing pipe body respectively, and the positioning bolts on the first casing pipe body extend into the positioning holes in the second casing pipe body so that the tail end of the first casing pipe body can be fixedly connected with the head end of the second casing pipe body. The sleeve disclosed by the utility model is convenient to connect, the labor intensity is effectively reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling casings, in particular to a casing. Background Art

[0002] During the construction of exploration drilling holes, the strata that the boreholes pass through will be different, mainly including various complex strata such as loose alluvial strata, structural damage zones and aquifers. Under these stratum conditions, drilling or constructing wells for various purposes inevitably requires the placement of casing, which plays a role in wall protection, collapse prevention and water isolation.

[0003] When the traditional casing is installed, it needs to be connected in sequence. The most common connection method is threaded connection. The connection process of this connection method is cumbersome, and the labor intensity required to rotate the casing is high, which reduces the construction efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a sleeve to solve the problems existing in the above-mentioned prior art, which is convenient to connect, effectively reduces labor intensity and improves construction efficiency.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a sleeve, comprising at least two sleeve bodies, the tail end of the sleeve body is fixedly provided with a plurality of positioning bolts around the axis of the sleeve body, the head end of the sleeve body is fixedly provided with a plurality of elastic clamps around the axis of the sleeve body, the number of the elastic clamps is equal to the number of the positioning bolts, and positioning holes are opened on the elastic clamps; the sleeve bodies are arranged in sequence from bottom to top, and any two adjacent sleeve bodies are respectively a first sleeve body and a second sleeve body, and the positioning bolts on the first sleeve body extend into the positioning holes on the second sleeve body, so that the tail end of the first sleeve body is fixedly connected with the head end of the second sleeve body.

[0007] Preferably, a slot is provided at the rear end of the sleeve body around the axis of the sleeve body, and an insert ring is fixedly provided at the head end of the sleeve body around the axis of the sleeve body; when each positioning bolt on the first sleeve body extends into each positioning hole on the second sleeve body, the insert ring on the second sleeve body extends into the slot on the first sleeve body.

[0008] Preferably, the first end of the elastic clip is fixed to the head end of the sleeve body, the second end of the elastic clip extends above the first end of the elastic clip, the second end of the elastic clip extends in a direction away from the axis of the sleeve body, and the positioning hole is opened on the second end of the elastic clip.

[0009] Preferably, a plurality of limit blocks are fixedly arranged at the rear end of the sleeve body around the axis of the sleeve body, and an avoidance channel is left between any two adjacent limit blocks, and the number of the avoidance channels is equal to the number of the elastic clips; each elastic clip on the second sleeve body can pass through each avoidance channel on the first sleeve body, and each positioning bolt on the first sleeve body can extend into each positioning hole on the second sleeve body.

[0010] Preferably, each elastic clamping plate on the second sleeve body contacts each limiting block on the first sleeve body and slides relatively.

[0011] Preferably, an annular groove is provided on the outer wall of the tail end of the sleeve body, and the annular groove is provided above the limit block; the positioning bolt is placed in the annular groove; a pressure ring is sleeved in the annular groove, and pressing the pressure ring downward can cause the pressure ring to move downward, and the downward movement of the pressure ring can push the second end of the elastic clamp to separate from the positioning bolt.

[0012] Preferably, the pressure ring has a tapered section, which gradually shrinks inward to the bottom end surface of the pressure ring, and the tapered section is used to contact the second end of the elastic clamping plate.

[0013] Preferably, the pressure ring is provided with a plurality of limiting grooves, the number of the limiting grooves is equal to the number of the positioning bolts, and each of the limiting grooves is used to avoid each of the positioning bolts when the pressure ring moves downward.

[0014] Preferably, a plurality of shifting plates are fixedly arranged on the outer wall of the pressure ring around the axis of the sleeve body.

[0015] Preferably, the elastic clamping plate is an elastic steel plate, and the elastic clamping plate is welded to the head end of the sleeve body.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The sleeve provided by the utility model is characterized in that a plurality of positioning bolts are fixedly arranged around the axis of the sleeve main body at the tail end thereof, and a plurality of elastic clamping plates are fixedly arranged around the axis of the sleeve main body at the head end thereof, and a positioning hole is opened on the elastic clamping plate. When the sleeve main bodies are assembled to obtain a sleeve of a required length, only the dead weight of the upper sleeve main body is required to press down the tail end of the upper sleeve main body, drive the positioning bolts to squeeze the elastic clamping plate on the head end of the lower sleeve main body, so that the elastic clamping plate on the head end of the lower sleeve main body is first pressed and expanded outwards, and after the positioning bolts on the upper sleeve main body are aligned with the positioning holes on the lower sleeve main body, the elastic clamping plate on the head end of the lower sleeve main body moves inwards under the action of its own elasticity, so that the positioning bolts on the upper sleeve main body are extended into the positioning holes on the lower sleeve main body, and the connection can be completed. The connection is convenient, and the labor intensity can be effectively reduced, and the construction efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of the sleeve provided by the utility model;

[0020] Figure 2 for Figure 1 Exploded diagram of casing structure;

[0021] Figure 3 for Figure 1 A partial cross-sectional view of the connection between two casing bodies in the casing;

[0022] In the figure: 1. sleeve body; 2. annular groove; 3. positioning bolt; 4. limiting block; 5. slot; 6. insert ring; 7. elastic clamping plate; 8. positioning hole; 9. pressure ring; 10. limiting groove; 11. dial plate. DETAILED DESCRIPTION

[0023] 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.

[0024] The purpose of the utility model is to provide a sleeve to solve the problems existing in the above-mentioned prior art, which is convenient to connect, effectively reduces labor intensity and improves construction efficiency.

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1-3 As shown, the utility model provides a sleeve, comprising at least two sleeve bodies 1, a plurality of positioning bolts 3 are fixedly arranged at the tail end of the sleeve body 1 around the axis of the sleeve body 1, a plurality of elastic clips 7 are fixedly arranged at the head end of the sleeve body 1 around the axis of the sleeve body 1, the number of the elastic clips 7 is equal to the number of the positioning bolts 3, and positioning holes 8 are opened on the elastic clips 7; the sleeve bodies 1 are arranged in sequence from bottom to top, and any two adjacent sleeve bodies 1 are respectively the first sleeve body and the second sleeve body, and the positioning bolts 3 on the first sleeve body extend into the positioning holes 8 on the second sleeve body, so that the tail end of the first sleeve body is fixedly connected with the head end of the second sleeve body.

[0027] The casing provided by the utility model is particularly suitable for large-diameter drilling. A plurality of positioning bolts 3 are fixedly arranged around the axis of the casing main body 1 at the rear end of the casing main body 1, and a plurality of elastic clamping plates 7 are fixedly arranged around the axis of the casing main body 1 at the head end of the casing main body 1. A positioning hole 8 is opened on the elastic clamping plate 7. When the casing main bodies 1 are assembled to obtain a casing of a required length, only the dead weight of the upper casing main body 1 is required to press down the rear end of the upper casing main body 1, so as to drive the positioning bolts 3 to squeeze the elastic clamping plate 7 on the head end of the lower casing main body 1, so that the elastic clamping plate 7 on the head end of the lower casing main body 1 is first compressed and expanded outward, and the positioning bolts 3 on the upper casing main body 1 and the lower casing main body are pressed together. After the positioning holes 8 on 1 are aligned, the elastic clamping plate 7 on the head end of the lower sleeve body 1 moves inward under its own elastic action, so that the positioning bolt 3 on the upper sleeve body 1 extends into the positioning hole 8 on the lower sleeve body 1, and the connection can be completed. The connection is convenient, which can effectively reduce labor intensity and improve construction efficiency. As a more preferred implementation method of this embodiment, each positioning bolt 3 extends in the radial direction of the sleeve body 1, with a simple structure and easy to manufacture. It should be noted that the first sleeve body and the second sleeve body have the same structure, both of which are sleeve bodies 1. They are named differently here only for the convenience of distinguishing one sleeve body 1 from the other sleeve body 1 of any two adjacent sleeve bodies 1.

[0028] Furthermore, a slot 5 is provided at the rear end of the sleeve body 1 around the axis of the sleeve body 1, and an insert ring 6 is fixedly provided at the head end of the sleeve body 1 around the axis of the sleeve body 1; when each positioning bolt 3 on the first sleeve body extends into each positioning hole 8 on the second sleeve body, the insert ring 6 on the second sleeve body extends into the slot 5 on the first sleeve body to enhance the connection stability between each sleeve body 1.

[0029] As a more preferred implementation of this embodiment, the first end of the elastic clip 7 is fixed to the head end of the sleeve body 1, the second end of the elastic clip 7 extends above the first end of the elastic clip 7, and the second end of the elastic clip 7 extends in a direction away from the axis of the sleeve body 1. The positioning hole 8 is opened on the second end of the elastic clip 7 to facilitate the second end of the elastic clip 7 to move outward under pressure.

[0030] Furthermore, a plurality of limit blocks 4 are fixedly arranged around the axis of the sleeve body 1 at the rear end of the sleeve body 1, and an avoidance channel is left between any two adjacent limit blocks 4, and the number of avoidance channels is equal to the number of elastic clips 7; each elastic clip 7 on the second sleeve body can pass through each avoidance channel on the first sleeve body, and make each positioning bolt 3 on the first sleeve body extend into each positioning hole 8 on the second sleeve body, so as to facilitate the limiting and guiding of the elastic clip 7, improve the docking efficiency of the positioning hole 8 and the positioning bolt 3, and thus improve the construction efficiency.

[0031] As a more preferred implementation of this embodiment, each elastic clamping plate 7 on the second sleeve body contacts and slides relatively with each limiting block 4 on the first sleeve body, so as to facilitate accurate limiting and guiding of the elastic clamping plate 7.

[0032] Furthermore, an annular groove 2 is provided on the outer wall of the rear end of the sleeve body 1, and the annular groove 2 is provided above the limit block 4; the positioning bolt 3 is placed in the annular groove 2; a pressure ring 9 is sleeved in the annular groove 2, and pressing the pressure ring 9 downward can move the pressure ring 9 downward, and the downward movement of the pressure ring 9 can push the second end of the elastic clamp 7 to separate from the positioning bolt 3, so as to facilitate the disassembly and separation of each sleeve body 1.

[0033] As a more preferred implementation manner of this embodiment, the pressure ring 9 has a tapered section, which gradually shrinks inward to the bottom end face of the pressure ring 9. The tapered section is used to contact the second end of the elastic clip 7, so as to facilitate the second end of the elastic clip 7 to be gradually and smoothly lifted.

[0034] Furthermore, a plurality of limiting grooves 10 are provided on the pressing ring 9, and the number of the limiting grooves 10 is equal to the number of the positioning bolts 3. The limiting grooves 10 are used to avoid the positioning bolts 3 when the pressing ring 9 moves downward, and the structure is compact and the space utilization rate is high.

[0035] Furthermore, a plurality of paddles 11 are fixedly arranged on the outer wall of the pressing ring 9 around the axis of the sleeve body 1 to facilitate pressing the pressing ring 9 downward.

[0036] As a more preferred implementation of this embodiment, the elastic clamping plate 7 is an elastic steel plate, and the elastic clamping plate 7 is welded to the head end of the sleeve body 1, which has a simple structure and is easy to manufacture and use.

[0037] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A casing, characterized in that: The invention comprises at least two sleeve bodies, wherein a plurality of positioning bolts are fixedly arranged at the tail end of the sleeve body around the axis of the sleeve body, and a plurality of elastic clamps are fixedly arranged at the head end of the sleeve body around the axis of the sleeve body, wherein the number of the elastic clamps is equal to the number of the positioning bolts, and positioning holes are opened on the elastic clamps; the sleeve bodies are arranged in sequence from bottom to top, and any two adjacent sleeve bodies are respectively the first sleeve body and the second sleeve body, and the positioning bolts on the first sleeve body extend into the positioning holes on the second sleeve body, so that the tail end of the first sleeve body is fixedly connected with the head end of the second sleeve body.

2. The sleeve according to claim 1, characterized in that: A slot is provided at the rear end of the sleeve body around the axis of the sleeve body, and an insert ring is fixedly provided at the head end of the sleeve body around the axis of the sleeve body; when each positioning bolt on the first sleeve body extends into each positioning hole on the second sleeve body, the insert ring on the second sleeve body extends into the slot on the first sleeve body.

3. The sleeve according to claim 1, characterized in that: The first end of the elastic clip is fixed to the head end of the sleeve body, the second end of the elastic clip extends above the first end of the elastic clip, the second end of the elastic clip extends in a direction away from the axis of the sleeve body, and the positioning hole is opened on the second end of the elastic clip.

4. The sleeve according to claim 3, characterized in that: A plurality of limit blocks are fixedly arranged at the rear end of the sleeve body around the axis of the sleeve body, and an avoidance channel is left between any two adjacent limit blocks, and the number of the avoidance channels is equal to the number of the elastic clips; each elastic clip on the second sleeve body can pass through each avoidance channel on the first sleeve body, and each positioning bolt on the first sleeve body can extend into each positioning hole on the second sleeve body.

5. The sleeve according to claim 4, characterized in that: Each elastic clamping plate on the second sleeve body contacts each limiting block on the first sleeve body and slides relatively.

6. The sleeve according to claim 4, characterized in that: An annular groove is provided on the outer wall of the rear end of the sleeve body, and the annular groove is provided above the limit block; the positioning bolt is placed in the annular groove; a pressure ring is sleeved in the annular groove, and pressing the pressure ring downward can move the pressure ring downward, and the downward movement of the pressure ring can push the second end of the elastic clamp to separate from the positioning bolt.

7. The sleeve according to claim 6, characterized in that: The pressure ring is provided with a tapered section, which gradually shrinks inwards to the bottom end surface of the pressure ring, and the tapered section is used to contact the second end of the elastic clamping plate.

8. The sleeve according to claim 6, characterized in that: The pressure ring is provided with a plurality of limiting grooves, the number of which is equal to the number of the positioning bolts, and each limiting groove is used to avoid each positioning bolt when the pressure ring moves downward.

9. The sleeve according to claim 6, characterized in that: A plurality of shifting plates are fixedly arranged on the outer wall of the pressure ring around the axis of the sleeve body.

10. The sleeve according to claim 1, characterized in that: The elastic clamping plate is an elastic steel plate, and the elastic clamping plate is welded to the head end of the sleeve body.

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