Wellhead slip supporting and fixing device

Abstract

The invention provides a wellhead slip supporting and fixing device which comprises a supporting table, a first slip supporting and fixing mechanism is arranged above the supporting table, a lifting table is arranged above the first slip supporting and fixing mechanism, a second slip supporting and fixing mechanism is arranged at the top of the lifting table, the supporting table is arranged on a wellhead sleeve in a sleeving mode, and the second slip supporting and fixing mechanism is arranged on the top of the lifting table. A slip assembly is further installed on the well mouth casing pipe, and the upper portion of the well mouth casing pipe sequentially penetrates through the first slip supporting and fixing mechanism, the lifting table and the second slip supporting and fixing mechanism. The device has the beneficial effects that by arranging the first slip supporting and fixing mechanism and the second slip supporting and fixing mechanism, the problem that local stress concentration is likely to be caused by welding pipe hoop supporting can be solved, then the slip supporting effect is good, the lifting table can ascend and descend, adjustment and installation can be achieved according to the actual situation, practicability is high, and practicability is high. And the well mouth slip supporting and fixing device can avoid drilling holes in a well mouth casing pipe, and can meet the actual situation requirements of the mine.

Description

Technical Field

[0001] The invention belongs to the technical field of mine drilling engineering, and in particular relates to a wellhead slip supporting and fixing device. Background Art

[0002] Slips are specialized tools used to clamp drill pipe, tubing, or other tubing strings to the wellhead flange or turntable during downhole operations. They reduce labor intensity and increase drilling speed. Slips are categorized by their power source: manual slips and power slips. Manual slips utilize human labor to tighten or loosen the tubing string; power slips utilize gas or liquid pressure to propel the slips to perform the desired action. Existing technologies suffer from stress concentration issues: welded pipe clamp supports are prone to localized stress concentration, resulting in poor slip support effectiveness. Summary of the Invention

[0003] In view of this, the present invention aims to provide a wellhead slip support and fixing device to solve the stress concentration problem existing in the above-mentioned prior art.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A wellhead slip support and fixing device comprises a support platform, a first slip support and fixing mechanism is provided above the support platform, a lifting platform is provided above the first slip support and fixing mechanism, a second slip support and fixing mechanism is provided on the top of the lifting platform, the support platform is sleeved on the wellhead casing, a slip assembly is also installed on the wellhead casing, and the first slip support and fixing mechanism, the lifting platform and the second slip support and fixing mechanism are sequentially passed through the top of the wellhead casing.

[0006] Furthermore, a first clearance hole for the wellhead casing to pass through is opened in the middle of the support platform, and a support column is respectively provided at the four corners of the bottom of the support platform.

[0007] Furthermore, the first cava support and fixing mechanism includes a support base, two first slide rails, two fixed clamps and two first driving sources. The bottom of the support base is installed on the top of the support platform through a mounting column. A first slide rail is installed at both ends above the support base. A fixed clamp is slidably connected above each first slide rail. The two fixed clamps are symmetrically arranged, and a first driving source is installed at one end of each fixed clamp.

[0008] Furthermore, a second clearance hole for the wellhead casing to pass through is opened in the middle of the support base.

[0009] Furthermore, a first sliding groove is provided at one end of the bottom of the fixing clamp ring, and a first annular groove is provided at the other end of the fixing clamp ring.

[0010] Furthermore, the lifting platform includes a lifting platform body, four guide sleeves and a lifting piece. The four corners of the bottom of the lifting platform body are respectively installed to the support platform through a guide sleeve. A lifting piece is also installed at the bottom of the lifting platform body, and the lifting piece is used to lift the lifting platform body.

[0011] Furthermore, a third clearance hole for the wellhead casing to pass through is opened in the middle of the lifting platform body, and the third clearance hole, the second clearance hole and the first clearance hole are coaxially arranged.

[0012] Furthermore, the second slip support and fixing mechanism includes two support rings and two second driving sources. The two support rings are symmetrically arranged above the lifting platform body, and a second driving source is installed at one end of each support ring.

[0013] Furthermore, the second cava support and fixing mechanism also includes a second slide rail, a second slide groove is opened at one end of the bottom of the support ring, the second slide groove is used in conjunction with the second slide rail, a second annular groove is opened at the other end of the fixing clamping ring, and a weight-reducing hole is also opened above the support ring.

[0014] Compared with the existing technology, the wellhead cava support and fixing device described in the present invention has the following advantages: the wellhead cava support and fixing device described in the present invention, by setting a first cava support and fixing mechanism and a second cava support and fixing mechanism, can solve the problem of local stress concentration easily caused by welded pipe clamp support, thereby making the cava support effect better, and the lifting platform can be raised and lowered, and can be adjusted and installed according to actual conditions, and is highly practical. In addition, the wellhead cava support and fixing device can avoid drilling holes in the wellhead casing, and can meet the actual needs of the mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0017] Figure 2 A partial schematic diagram of the overall structure according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the second slip support and fixing mechanism according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1. Support platform; 11. Support column; 2. First slip support and fixing mechanism; 21. Support base; 22. First slide rail; 23. Fixed clamp; 24. First drive source; 3. Lifting platform; 31. Lifting platform body; 32. Guide casing; 4. Second slip support and fixing mechanism; 41. Support ring; 42. Second drive source; 5. Wellhead casing; 6. Slip assembly. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0025] like Figures 1 to 3 As shown, the wellhead cava supporting and fixing device includes a supporting platform 1, a first cava supporting and fixing mechanism 2 is provided above the supporting platform 1, a lifting platform 3 is provided above the first cava supporting and fixing mechanism 2, a second cava supporting and fixing mechanism 4 is provided on the top of the lifting platform 3, the supporting platform 1 is sleeved on the wellhead casing 5, a cava assembly 6 is also installed on the wellhead casing 5, and the first cava supporting and fixing mechanism 2, the lifting platform 3 and the second cava supporting and fixing mechanism 4 are passed through the top of the wellhead casing 5 in sequence.

[0026] The wellhead cava support and fixing device can solve the problem of local stress concentration easily caused by welded pipe clamp support by setting the first cava support and fixing mechanism 2 and the second cava support and fixing mechanism 4, thereby making the cava support effect better, and the lifting platform 3 can be raised and lowered, and can be adjusted and installed according to actual conditions, and is highly practical. In addition, the wellhead cava support and fixing device can avoid drilling holes in the wellhead casing, and can meet the actual needs of the mining party.

[0027] In a preferred embodiment of the present invention, a first clearance hole for the wellhead casing 5 to pass through is opened in the middle of the support platform 1, and a support column 11 is respectively set at the four corners of the bottom of the support platform 1. In actual use, the support column 11 can be installed on the cement platform around the wellhead casing 5. In this embodiment, the support platform 1 can also be a flange platform. Through the setting of the support column 11, space can be left at the bottom of the support platform 1 for the staff to install the pipe clamp, which is highly practical.

[0028] In a preferred embodiment of the present invention, the first cava supporting and fixing mechanism 2 includes a supporting base 21, two first slide rails 22, two fixed clamping rings 23 and two first driving sources 24. The bottom of the supporting base 21 is installed on the top of the supporting platform 1 through a mounting column. A first slide rail 22 is installed at both ends above the supporting base 21. A fixed clamping ring 23 is slidably connected above each first slide rail 22. The two fixed clamping rings 23 are symmetrically arranged, and a first driving source 24 is installed at one end of each fixed clamping ring 23. In this embodiment, the first driving source 24 can be a cylinder or an electric telescopic rod. In actual use, when the wellhead casing 5 needs to be stress-dispersed and supported, by driving the first driving source 24, the telescopic rods of the two first driving sources 24 push the two fixed clamping rings 23 closer to each other, so that they can tightly press against the wellhead casing 5.

[0029] In a preferred embodiment of the present invention, a second clearance hole for the wellhead casing 5 to pass through is opened in the middle of the support base 21. In actual use, the size of the second clearance hole can be the same as that of the first clearance hole to avoid interfering with the passage of the wellhead casing 5.

[0030] In a preferred embodiment of the present invention, a first sliding groove is provided at one end of the bottom of the fixed clamping ring 23, and a first annular groove is provided at the other end of the fixed clamping ring 23, so that the first annular grooves of the two fixed clamping rings 23 can be symmetrically arranged on both sides of the wellhead casing 5, thereby facilitating the clamping of the wellhead casing 5. In this embodiment, the first sliding groove facilitates the sliding of the first slide rail 22 therein. It should be noted that in order to avoid interfering with the first annular groove from clamping the wellhead casing 5, the first sliding groove is not connected to the first annular groove.

[0031] In a preferred embodiment of the present invention, the lifting platform 3 includes a lifting platform body 31, four guide sleeves 32 and a lifting piece. The four corners of the bottom of the lifting platform body 31 are respectively installed to the support platform 1 through a guide sleeve 32. A lifting piece is also installed at the bottom of the lifting platform body 31. The lifting piece is used to lift the lifting platform body 31. In actual use, the number of lifting pieces can be one or more, which can be determined according to actual conditions. The lifting piece can be driven by a cylinder or an electric telescopic rod or other lifting components.

[0032] In a preferred embodiment of the present invention, a third clearance hole for the passage of the wellhead casing 5 is opened in the middle of the lifting platform body 31, and the third clearance hole, the second clearance hole and the first clearance hole are coaxially arranged. In actual use, the size of the third clearance hole can be the same as the size of the first clearance hole and the second clearance hole to avoid interference with the passage of the wellhead casing 5.

[0033] In a preferred embodiment of the present invention, the second cava supporting and fixing mechanism 4 includes two support rings 41 and two second driving sources 42. The two support rings 41 are symmetrically arranged above the lifting platform body 31. A second driving source 42 is installed at one end of each support ring 41. In this embodiment, the second driving source 42 can be a cylinder or an electric telescopic rod.

[0034] In a preferred embodiment of the present invention, the second slip support and fixing mechanism 4 further includes a second slide rail, a second slide groove is defined at one end of the bottom of the support ring 41, and the second slide groove cooperates with the second slide rail. A second annular groove is defined at the other end of the fixing clamping ring 23, and a weight-reducing hole is also defined above the support ring 41. In this embodiment, the second annular grooves of the two support rings 41 can be symmetrically arranged on either side of the wellhead casing 5 to facilitate the clamping of the wellhead casing 5. In this embodiment, the second slide groove facilitates the sliding of the second slide rail therein. It should be noted that to avoid interference with the second annular groove clamping the wellhead casing 5, the second slide groove is not connected to the second annular groove.

[0035] The present wellhead slip support and fixing device is also applicable to wellhead casing 5 without drilling arrangement. This is because in actual use, the mining company may require to maintain the integrity of the casing and cannot drill holes or insert rods. The wellhead support method cannot be used when lowering the casing. Therefore, it is designed that during the casing lowering process, a pipe clamp needs to be welded on the top of the casing, and a large slip is used to clamp the casing at the wellhead and reinforce it to prevent the casing from being strangled. However, this situation is prone to stress concentration problems. The present wellhead slip support and fixing device can solve the problem of stress concentration under the slip assembly 6.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Wellhead slip support and fixing device, characterized by: The invention comprises a support platform (1), a first slip support and fixing mechanism (2) is provided above the support platform (1), a lifting platform (3) is provided above the first slip support and fixing mechanism (2), a second slip support and fixing mechanism (4) is provided on the top of the lifting platform (3), the support platform (1) is sleeved on a wellhead casing (5), a slip assembly (6) is also installed on the wellhead casing (5), and the wellhead casing (5) passes through the first slip support and fixing mechanism (2), the lifting platform (3) and the second slip support and fixing mechanism (4) in sequence.

2. The wellhead slip support and fixing device according to claim 1, characterized in that: A first clearance hole for the wellhead casing (5) to pass through is provided in the middle of the support platform (1), and a support column (11) is provided at each of the four corners of the bottom of the support platform (1).

3. The wellhead slip support and fixing device according to claim 1, characterized in that: The first cava support and fixing mechanism (2) comprises a support base (21), two first slide rails (22), two fixed snap rings (23) and two first drive sources (24); the bottom of the support base (21) is mounted above the support platform (1) via a mounting column; a first slide rail (22) is mounted on both ends of the support base (21); a fixed snap ring (23) is slidably connected to the top of each first slide rail (22); the two fixed snap rings (23) are symmetrically arranged, and a first drive source (24) is mounted on one end of each fixed snap ring (23).

4. The wellhead slip support and fixing device according to claim 3, characterized in that: A second clearance hole for the wellhead casing (5) to pass through is provided in the middle of the support base (21).

5. The wellhead slip support and fixing device according to claim 3, characterized in that: A first sliding groove is provided at one end of the bottom of the fixing clamp ring (23), and a first annular groove is provided at the other end of the fixing clamp ring (23).

6. The wellhead slip support and fixing device according to claim 4, characterized in that: The lifting platform (3) comprises a lifting platform body (31), four guide sleeves (32) and a lifting piece. The four corners of the bottom of the lifting platform body (31) are respectively installed on the support platform (1) through a guide sleeve (32). The bottom of the lifting platform body (31) is also equipped with a lifting piece, which is used to lift the lifting platform body (31).

7. The wellhead slip support and fixing device according to claim 6, characterized in that: A third clearance hole for the wellhead casing (5) to pass through is opened in the middle of the lifting platform body (31), and the third clearance hole, the second clearance hole and the first clearance hole are coaxially arranged.

8. The wellhead slip support and fixing device according to claim 1, characterized in that: The second cava supporting and fixing mechanism (4) comprises two supporting rings (41) and two second driving sources (42), wherein the two supporting rings (41) are symmetrically arranged above the lifting platform body (31), and a second driving source (42) is installed at one end of each supporting ring (41).

9. The wellhead slip support and fixing device according to claim 8, characterized in that: The second cava support and fixing mechanism (4) further comprises a second slide rail, a second slide groove is provided at one end of the bottom of the support ring (41), the second slide groove is used in conjunction with the second slide rail, a second annular groove is provided at the other end of the fixing clamping ring (23), and a weight-reducing hole is also provided above the support ring (41).

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