Bottom slip connecting device

Abstract

The utility model discloses a bottom slip connecting device, which relates to the technical field of petroleum drilling, and comprises a main body, a slip body and jackscrews, the slip body is arranged in the main body, the jackscrews which are symmetrically distributed are connected in the main body in a penetrating manner, a compression ring is arranged between the jackscrews and the slip body, and the compression ring is connected with the slip body. And a sleeve extending into the main body is sleeved in the compression ring and the slip body. According to the bottom slip connecting device, the jackscrew can be rotated, so that the jackscrew extrudes the pressing ring in the moving process, the pressing ring can move upwards and push the slip body, the slip body can tightly hold a sleeve after moving upwards, meanwhile, the slip body can push an inner ring in the moving-upwards process, and therefore the sleeve can be tightly clamped; when the bottom slip connecting device is used, the inner ring moves along the matched conical surface and is tightly attached to the outer surface of the sleeve, then metal sealing is established, and the bottom slip connecting device can have a good sealing effect in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a bottom slip connection device. Background Art

[0002] Oil drilling is a work that uses special equipment and technology to drill a cylindrical hole of a certain diameter downward or to one side at a pre-selected surface location and drill into the underground oil and gas layer. The bottom slip connection device is a commonly used connection device in oil drilling. It is of great significance to ensure the smooth progress of drilling operations, improve operational efficiency and ensure operational safety.

[0003] However, when most bottom slip connection devices are used in oil drilling, the casing is directly in contact with the slip, and then fixed by a pressure ring, so that the bottom slip connection device is easy to loosen after the casing is installed, which in turn causes the casing and the slip to slip, thereby reducing the sealing effect of the bottom slip connection device when in use. Utility Model Content

[0004] The utility model aims to provide a bottom slip connection device to solve the problem that the bottom slip connection device proposed in the above background technology is prone to reduce the sealing effect when in use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a bottom cava connection device, comprising a main body (1), a cava body (2) and a top screw (3), wherein the cava body (2) is arranged inside the main body (1), and the top screws (3) are symmetrically distributed and connected to the inside of the main body (1), and a metal sealing ring (6) is arranged at one end of the cava body (2) away from the pressure ring (4), and the metal sealing ring (6) comprises an outer ring (601), an inner ring (602), a hemispherical sealing surface (603) and a matching conical surface (604), one end of the outer ring (601) is slidably connected to the inner ring (602), and the outer surface of the outer ring (601) and the inner wall of the inner ring (602) are both provided with evenly distributed hemispherical sealing surfaces (603).

[0006] Preferably, a pressure ring is provided between the top screw and the slip body, and a sleeve extending to the interior of the main body is sleeved between the pressure ring and the slip body.

[0007] Preferably, the inner mating surfaces of the outer ring and the inner ring are mating conical surfaces.

[0008] Compared with the prior art, the beneficial effect of the utility model is that the bottom cava connection device can rotate the top screw so that the top screw squeezes the pressure ring during the movement, so that the pressure ring can move upward and push the cava body, so that the cava body can hold the sleeve tightly after moving upward, and at the same time, the cava body can also push the inner ring during the upward movement, so that the inner ring moves along the matching conical surface and fits tightly to the outer surface of the sleeve, thereby establishing a metal seal, and the inner ring can squeeze the outer ring when moving, so that the outer ring can fit tightly to the matching surface inside the main body, so that the bottom cava connection device can have a better sealing effect when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the main cutaway structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the main cutaway structure of the metal sealing ring of the utility model;

[0011] Figure 3 It is a schematic diagram of the main cutaway structure of the slip body of the utility model.

[0012] In the figure: 1, main body; 2, slip body; 3, top screw; 4, pressure ring; 5, sleeve; 6, metal sealing ring; 601, outer ring; 602, inner ring; 603, hemispherical sealing surface; 604, matching cone surface. DETAILED DESCRIPTION

[0013] 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.

[0014] See also Figure 1 , Figure 2 and Figure 3The utility model provides a technical solution: a bottom slip connection device, comprising a main body 1, a slip body 2 and a top screw 3, the slip body 2 is arranged inside the main body 1, the inside of the main body 1 is penetrated and connected with symmetrically distributed top screws 3, a pressure ring 4 is arranged between the top screw 3 and the slip body 2, the pressure ring 4 and the inside of the slip body 2 are sleeved with a sleeve 5 extending to the inside of the main body 1, and a metal sealing ring 6 is arranged at one end of the slip body 2 away from the pressure ring 4, the metal sealing ring 6 comprises an outer ring 601, an inner ring 602, a hemispherical sealing surface 603 and a matching conical surface 604, one end of the outer ring 601 is slidably connected with the inner ring 602, the outer surface of the outer ring 601 and the inner wall of the inner ring 602 are both provided with uniformly distributed hemispherical sealing surfaces 603, and the internal matching surfaces of the outer ring 601 and the inner ring 602 are matching conical surfaces 604.

[0015] When it comes to specific implementation,

[0016] See also Figure 1 , Figure 2 and Figure 3 It can be known that the top screw 3 can be rotated so that the top screw 3 can squeeze the pressure ring 4 during the movement, so that the pressure ring 4 can move upward and push the cava body 2, so that the cava body 2 can hold the sleeve 5 after moving upward, and at the same time, the cava body 2 can also push the inner ring 602 during the upward movement, so that the inner ring 602 moves along the matching conical surface 604 and fits tightly to the outer surface of the sleeve 5, thereby establishing a metal seal, and the inner ring 602 can squeeze the outer ring 601 when moving, so that the outer ring 601 can fit tightly to the matching surface inside the main body 1, and the hemispherical sealing surface 603 set by the outer ring 601 and the inner ring 602 can make the bottom cava connection device not only lock the sleeve 5 when in use, but also improve the sealing effect of the bottom cava connection device when in use.

[0017] To sum up, the bottom cava connection device is a connection device commonly used in oil drilling. The top screw 3 can be rotated so that the top screw 3 squeezes the pressure ring 4 during the movement, so that the pressure ring 4 can move upward and push the cava body 2, so that the cava body 2 can hold the casing 5 after moving upward. At the same time, the cava body 2 can also push the inner ring 602 during the upward movement, so that the inner ring 602 moves along the matching conical surface 604 and fits tightly to the outer surface of the casing 5, thereby establishing a metal seal, so that the bottom cava connection device can have a better sealing effect when in use. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0018] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bottom slip connection device, comprising a main body (1), a slip body (2) and a top screw (3), characterized in that: A cava body (2) is arranged inside the main body (1), and symmetrically distributed top screws (3) are connected and penetrated inside the main body (1). A metal sealing ring (6) is arranged at one end of the cava body (2) away from the pressure ring (4), and the metal sealing ring (6) includes an outer ring (601), an inner ring (602), a hemispherical sealing surface (603) and a matching conical surface (604). One end of the outer ring (601) is slidably connected to the inner ring (602), and the outer surface of the outer ring (601) and the inner wall of the inner ring (602) are both provided with evenly distributed hemispherical sealing surfaces (603).

2. A bottom slip connection device according to claim 1, characterized in that: A pressure ring (4) is provided between the top screw (3) and the slip body (2), and a sleeve (5) extending into the interior of the main body (1) is sleeved between the pressure ring (4) and the slip body (2).

3. A bottom slip connection device according to claim 1, characterized in that: The inner matching surfaces of the outer ring (601) and the inner ring (602) are matching conical surfaces (604).

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