Casing head with automatic locking mechanism

Abstract

The utility model discloses a casing head with an automatic locking mechanism, which comprises a casing head, the top of the casing head is provided with a hanger, the inside of the casing head is provided with a locking mechanism, the flange joint of the top of the casing head is provided with a connecting column, the bottom of the connecting column is fixedly connected with a spring, and the locking mechanism comprises an extrusion block. According to the casing head with the automatic locking mechanism, the casing head is connected with other parts through the clamping plate on the connecting column, the clamping plate can control rotating opening and closing according to the reason of the middle rotating shaft, the clamping plate can rotate to be opened and closed, and the clamping plate can rotate to be opened and closed; the opened clamping plate is fixed through the threaded hole, connection of the casing head becomes more stable through the gravity of the casing head, an extrusion block in the casing head automatically clamps and fixes an oil pipe and a hanger when the oil pipe enters, and operation is more convenient and rapid.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of casing heads, in particular to a casing head with an automatic locking mechanism. Background Art

[0002] The casing head is used to fix the wellhead of the drilling, connect the wellhead casing string, support the gravity of the technical casing and the oil layer casing, seal the annular space between the layers of pipes, provide a transition connection for the installation of the blowout preventer, the tubing head, and the Christmas tree, and through the two side ports on the casing head body, operations such as supplementary mud squeezing, monitoring and filling of balancing fluid can be carried out. The existing casing heads are bolted or threaded when connecting the Christmas tree and the oil pipe, and this connection method is troublesome to install and disassemble. The existing casing heads are equipped with hangers inside, and the hangers and the oil pipes are fixed and locked by bolts when fixed, which makes installation and disassembly very troublesome. Utility Model Content

[0003] The utility model aims to provide a casing head with an automatic locking mechanism, in order to solve the problems in the above background technology that the casing head is complicated to connect with other parts and the locking is time-consuming.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A casing head with an automatic locking mechanism comprises a casing head, a hanger is arranged on the top of the casing head, a locking mechanism is arranged inside the casing head, a connecting column is arranged at the flange connection on the top of the casing head, and a connecting spring is fixed at the bottom of the connecting column.

[0006] The locking mechanism comprises an extrusion block, one side of the top of the extrusion block is connected to the bottom end of the balance plate, and the top end of the balance plate is fixedly connected to the limiting block.

[0007] Preferably, one side of the bottom of the extrusion block is connected to a second balance plate, and the middle of the second balance plate and the first balance plate can rotate on a fixed shaft, and the shaft is fixedly connected to the inner wall of the casing head.

[0008] Through the above technical solution, the extrusion block drives the balance plate to rotate.

[0009] Preferably, a clamping plate is provided on the upper part of the interior of the connecting column, and the top of the clamping plate is rotatably connected to one end of the arc-shaped connecting strip, and the other end of the arc-shaped connecting strip is fixed on the middle rotating shaft.

[0010] Through the above technical solution, the arc-shaped connecting strip drives the clamping plate to move outward when it rotates.

[0011] Preferably, one side of the top of the second balance plate is fixedly connected to one end of a balance spring, and the other end of the balance spring is fixedly connected to the inside of the casing head.

[0012] Through the above technical solution, the second balance plate can rebound to the initial position through the spring after rotating.

[0013] Preferably, a sliding column is provided at the bottom of the second balancing plate, a rotating shaft and a gear are fixedly connected in the middle of the sliding column, the gear is meshed with a rack on one side of the baffle, and the baffle limits the rotation of the second balancing plate.

[0014] Through the above technical solution, the gear drives the baffle to move up and down inside the limiting groove.

[0015] Preferably, the clamping plate can slide on the slide rail, and a threaded hole is provided on one side of the rotating shaft of the connecting column.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the casing head with an automatic locking mechanism is connected with the clamping plate on the connecting column and other components, the clamping plate can be freely rotated to open and close according to the intermediate rotating shaft, and the connection is more convenient and quicker than bolts. The opened clamping plate is fixed by the threaded hole, and the gravity of the casing head is used to make the connection of the casing head more stable. The extrusion block inside the casing head automatically supports and fixes the oil pipe and the hanger when the oil pipe enters, which makes the operation more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the top view of the connecting block of the utility model;

[0020] Figure 4 For this utility model Figure 1 A is an enlarged structural diagram;

[0021] Figure 5 It is a schematic diagram of the side structure of point A of the utility model.

[0022] In the figure: 1, casing head; 2, hanger; 3, locking mechanism; 301, extrusion block; 302, first balance plate; 303, fixed shaft; 304, limit block; 305, balance spring; 306, second balance plate; 4, connecting column; 401, clamping plate; 402, arc-shaped connecting strip; 403, slide rail; 5, spring; 6, sliding column; 601, gear; 602, baffle; 603, rack. 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] See also Figure 1-5 , the utility model provides a technical solution: the utility model provides a casing head with an automatic locking mechanism;

[0025] like Figure 1 and Figure 2 As shown, a hanger 2 is provided on the top of the casing head 1, a locking mechanism 3 is provided inside the casing head 1, a connecting column 4 is provided at the flange connection on the top of the casing head 1, a connecting spring 5 is fixed to the bottom of the connecting column 4, a clamping plate 401 is provided on the upper part of the interior of the connecting column 4, the top of the clamping plate 401 is rotatably connected to one end of an arc-shaped connecting strip 402, the other end of the arc-shaped connecting strip 402 is fixed on the middle rotating shaft, the clamping plate 401 can slide on the slide rail 403, and a threaded hole 404 is provided on one side of the rotating shaft of the connecting column 4.

[0026] In the above scheme, there are four arc-shaped connecting strips 402, one end of each of which is fixedly connected to the top of one side of the clamping plate 401, and the other end of each arc-shaped connecting strip 402 is fixedly connected to four positions of the upper, lower, left and right sides of the rotating shaft. A threaded hole 404 is provided on one side of the rotating shaft, and the threaded hole can be used to fix the rotating shaft. The positioning pin is inserted into the threaded hole 404 and the fixing hole at the bottom to limit the clamping plate 401.

[0027] like Figure 3 As shown, one side of the bottom of the extrusion block 301 can press the second balance plate 306, and the second balance plate 306 and the first balance plate 302 can rotate on the fixed shaft 303, the fixed shaft 303 is fixedly connected to the inner wall of the casing head 1, and one side of the top of the second balance plate 306 is fixedly connected to one end of the balance spring 305, and the other end of the balance spring 305 is fixedly connected to the inside of the casing head 1.

[0028] In the above scheme, the front end of the extrusion block 301 is trapezoidal, which is convenient for extruding the bottom oil pipe when it moves upward. The top of the extrusion block 301 and the first balance plate 302 are rotatably connected by a connecting rod. A fixing groove is provided on the surface of the hanger 2 so that the limit block 304 can be engaged to fix the hanger 2. The bottom of the extrusion block 301 and the second balance plate 306 are also rotatably connected to each other by a connecting rod.

[0029] like Figure 4 and Figure 5As shown, a sliding column 6 is provided at the bottom of the second balancing plate 306 , a rotating shaft and a gear 601 are fixedly connected in the middle of the sliding column 6 , the gear 601 is meshed with a rack 603 on one side of the baffle 602 , and the baffle 602 limits the rotation of the second balancing plate 306 .

[0030] In the above scheme, one side of the bottom end of the second balance plate 306 can contact the baffle 602, and the baffle 602 is set in the middle slide groove of the sliding column 6. One side of the baffle 602 is fixedly connected to the rack 603, and one side is connected to the sliding column 6 through a slider and a slide groove. The rack 603 is meshed with the gear 601, and the gear 601 is fixedly connected to the middle rotating shaft, and the rotating shaft is driven to rotate through the knob outside the sliding column 6.

[0031] like Figure 1-5 As shown, when the oil well is moved left and right, the hanger 2 is first installed on the top of the casing head 1, and the oil pipe is inserted into the inner wall of the casing head 1 from below and connected to the hanger 2. When the oil pipe rises, it will contact the trapezoid at the bottom of the extrusion block 301, and the extrusion block 301 is squeezed outward and moved to the right, which will cause the bottom of the first balance plate 302 to rotate to the right. Because of the fixed shaft 303, the top of the first balance plate 302 rotates to the left, and the limiter fixedly connected to the top of the first balance plate 302 The positioning block 304 is engaged with the two sides of the hanger 2 to fix and lock the hanger 2. At the same time, the bottom end of the extrusion block 301 drives the top end of the second balance plate 306 to move to the right. The bottom of the second balance plate 306 contacts the baffle 602, so the second balance plate 306 will generate a leftward force on the baffle 602, so that the sliding column 6 moves leftward to clamp and fix the oil pipe. When the oil pipe completely pushes the extrusion block 301 out, the first balance plate 302 and the second balance plate 306 are moved because the extrusion block 301 cannot move. The first balancing plate 302 is driven by the extrusion block 301 to rotate, so that the limit block 304 is separated from the hanger 2, and the top fixing locating pin is removed to retract the card plate 401, and the entire casing head 1 can be removed without the need for a single screw to disassemble, which is very simple and quick.

[0032] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the protection content of the present invention.

[0033] 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 casing head with an automatic locking mechanism, comprising a casing head (1), characterized in that: The top of the casing head (1) is provided with a hanger (2), a locking mechanism (3) is arranged inside the casing head (1), a connecting column (4) is arranged at the flange connection of the top of the casing head (1), and a connecting spring (5) is fixed at the bottom of the connecting column (4); The locking mechanism (3) comprises an extrusion block (301), one side of the top of the extrusion block (301) is capable of pressing the bottom end of the first balance plate (302), and the top end of the first balance plate (302) is fixedly connected to the limit block (304).

2. A casing head with an automatic locking mechanism according to claim 1, characterized in that: One side of the bottom of the extrusion block (301) can press the second balance plate (306), and the middle of the second balance plate (306) and the first balance plate (302) can rotate on the fixed rotating shaft (303), and the fixed rotating shaft (303) is fixedly connected to the inner wall of the casing head (1).

3. A casing head with an automatic locking mechanism according to claim 2, characterized in that: One side of the top of the second balancing plate (306) is fixedly connected to one end of a balancing spring (305), and the other end of the balancing spring (305) is fixedly connected to the inside of the casing head (1).

4. The casing head with an automatic locking mechanism according to claim 1, characterized in that: A clamping plate (401) is provided on the upper part of the interior of the connecting column (4), and the top of the clamping plate (401) is rotatably connected to one end of the arc-shaped connecting strip (402), and the other end of the arc-shaped connecting strip (402) is fixed on the central rotating shaft.

5. A casing head with an automatic locking mechanism according to claim 4, characterized in that: The clamping plate (401) can slide on the slide rail (403), and a threaded hole (404) is provided on one side of the rotating shaft of the connecting column (4).

6. A casing head with an automatic locking mechanism according to claim 2, characterized in that: A sliding column (6) is provided at the bottom of the second balancing plate (306), a rotating shaft and a gear (601) are fixedly connected in the middle of the sliding column (6), the gear (601) is meshed with a rack (603) on one side of the baffle (602), and the baffle (602) limits the rotation of the second balancing plate (306).

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