An emergency casing head

Abstract

The utility model discloses an emergency casing head relates to oil drilling technical field, and it aims at solving the structure that the casing head lacks remote activation casing head bottom slip of existing casing head, and if direct contact operation of field personnel, there will be certain security hidden danger problem, and its technical scheme main points are including casing head body, the inner hole inside casing head body is installed with slip seat, the inner hole inside casing head body is located and is installed with slip tooth on the outside of slip seat, the inside of casing head body is located and is fixedly connected with the outside of slip seat close to the clamping block, the outside of casing head body is provided with hydraulic cylinder gland, one end of hydraulic cylinder gland outside installs the hydraulic cylinder inner cover, the inside of hydraulic cylinder gland is inserted with internal hexagon screw, the other end of hydraulic cylinder gland outside installs the grease injection valve, and the outer circular surface of hydraulic cylinder inner cover is installed with the piston. Reached the effect of safe use.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, and in particular to an emergency casing head. Background Technology

[0002] In oil drilling, the casing head is a crucial component of the wellhead assembly. Located at the top of the surface casing, it supports and seals different levels of the casing string and connects equipment such as blowout preventers and Christmas trees. It is one of the core components of the wellhead system, directly affecting the safety and reliability of the drilling, completion, and production phases. In oil drilling, the emergency casing head is a specially designed wellhead device used to quickly control wellhead pressure, restore wellbore integrity, or temporarily seal the wellhead in emergency situations (such as well control failure, casing damage, annular leakage, etc.) during drilling or completion, preventing blowouts, environmental pollution, or personnel casualties. It is one of the key emergency devices in the drilling safety system.

[0003] The existing technical solutions mentioned above have the following drawbacks: the existing casing head lacks a structure for remotely activating the bottom slip of the casing head, which poses certain safety hazards if on-site personnel directly handle and operate it. Utility Model Content

[0004] The purpose of this invention is to provide an emergency sleeve head.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An emergency sleeve head includes a sleeve head body, a slip seat installed inside the inner hole of the sleeve head body, a slip tooth installed inside the inner hole of the sleeve head body on the outer side of the slip seat, a locking block fixedly connected inside the sleeve head body on the outer side near the slip seat, a hydraulic cylinder cover provided on the outer side of the sleeve head body, a hydraulic cylinder inner sleeve installed at one end of the outer side of the hydraulic cylinder cover, an internal hexagon screw inserted into the inside of the hydraulic cylinder cover, a grease injection valve installed at the other end of the outer side of the hydraulic cylinder cover, and a piston installed on the outer circular surface of the hydraulic cylinder inner sleeve.

[0007] By adopting the above technical solution, the emergency casing head includes a casing head body, slip seat, slip teeth, hydraulic cylinder gland, hydraulic cylinder inner sleeve, piston, gate valve, pressure gauge, etc. Gate valve, needle valve and pressure gauge are installed on both sides of the casing head body, and slip teeth, slip seat, hydraulic cylinder gland, hydraulic cylinder inner sleeve and piston are installed at the bottom of the casing head. The whole constitutes the emergency casing head. The slip at the bottom of the casing head can be activated remotely by hydraulics, which can avoid contact with on-site personnel and is safe and reliable.

[0008] Furthermore, a gate valve is installed at one end of the outer side of the casing head body, and a needle valve and a pressure gauge are installed at the other end of the outer side of the casing head body.

[0009] By adopting the above technical solution, the casing head is mainly used to suspend and seal the casing string, and to carry out operations such as mud circulation, cementing, and testing through the side outlet, which is convenient to use.

[0010] Furthermore, the outer side of the locking block is provided with barbs, and the upper outer surface of the piston is provided with barbs. The barbs on the outer side of the locking block and the barbs on the outer side of the piston interlock. The piston is placed between the inner sleeve of the liquid cylinder and the body of the sleeve head, and slides between the inner sleeve of the liquid cylinder and the body of the sleeve head.

[0011] By adopting the above technical solution, the barbs on the piston and the collet interlock, preventing the piston from falling back and causing the collet to fail after the pressure source is lost.

[0012] Furthermore, the socket head cap screws are provided in two sets. One set of socket head cap screws extends through the cylinder cover to the inside of the cylinder inner sleeve and is threadedly connected to the cylinder inner sleeve. The other set of socket head cap screws extends through the cylinder cover to the inside of the sleeve head body and is threadedly connected to the sleeve head body. Each set of socket head cap screws is provided in multiple sets, and the slip seat and slip thread are mutually compatible.

[0013] By adopting the above technical solution, installation and use are convenient.

[0014] In summary, the beneficial technical effects of this utility model are as follows:

[0015] It adopts a casing head body, needle valve, gate valve, grease injection valve, hydraulic cylinder gland, hydraulic cylinder inner sleeve, piston, slip teeth and slip seat. The grease injection valve pressurizes and pushes the piston to slide. The piston drives the slip seat, activates the slip teeth, and makes the slip teeth grip the casing column. The hydraulic activation method can be operated remotely, avoiding direct operation by personnel, improving safety and producing a safe use effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0018] In the diagram, 1. Sleeve head body; 2. Needle valve; 3. Pressure gauge; 4. Gate valve; 5. Socket head screw; 6. Grease injection valve; 7. Cylinder gland; 8. Cylinder inner sleeve; 9. Piston; 10. Clamping block; 11. Slip seat; 12. Slip thread. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Reference Figure 1-2An emergency sleeve head includes a sleeve head body 1. A slip seat 11 is installed inside the inner bore of the sleeve head body 1. A slip tooth 12 is installed inside the inner bore of the sleeve head body 1, located outside the slip seat 11. A locking block 10 is fixedly connected inside the sleeve head body 1, near the slip seat 11. A hydraulic cylinder cap 7 is provided on the outer side of the sleeve head body 1. A hydraulic cylinder inner sleeve 8 is installed at one end of the outer side of the hydraulic cylinder cap 7. An internal hexagon screw 5 is inserted into the inside of the hydraulic cylinder cap 7. A grease injection valve 6 is installed at the other end of the outer side of the hydraulic cylinder cap 7. A piston 9 is installed on the outer surface of the hydraulic cylinder inner sleeve 8. A gate valve 4 is installed at one end of the outer side of the main body 1, and a needle valve 2 and a pressure gauge 3 are installed at the other end of the outer side of the casing head 1. The emergency casing head includes the casing head body 1, slip seat 11, slip teeth 12, hydraulic cylinder cover 7, hydraulic cylinder inner sleeve 8, piston 9, gate valve 4, pressure gauge 3, etc. Gate valve 4, needle valve 2 and pressure gauge 3 are installed on both sides of the casing head body 1. Slip teeth 12, slip seat 11, hydraulic cylinder cover 7, hydraulic cylinder inner sleeve 8 and piston 9 are installed at the bottom of the casing head. The whole constitutes the emergency casing head. The slip at the bottom of the casing head can be activated remotely by hydraulics, which can avoid contact with on-site personnel and is safe and reliable.

[0021] like Figure 1-2 As shown, the outer side of the locking block 10 is provided with barbs, and the outer surface of the upper end of the piston 9 is provided with barbs. The barbs on the outer side of the locking block 10 and the barbs on the outer side of the piston 9 are interlocked. The piston 9 is placed between the inner sleeve 8 of the hydraulic cylinder and the casing head body 1, and slides between the inner sleeve 8 of the hydraulic cylinder and the casing head body 1. There are two sets of hexagon socket screws 5. One set of hexagon socket screws 5 passes through the hydraulic cylinder cover 7 and extends into the interior of the inner sleeve 8 of the hydraulic cylinder, and is threadedly connected to the inner sleeve 8 of the hydraulic cylinder. The other set of hexagon socket screws 5 passes through the hydraulic cylinder cover 7 and extends into the interior of the casing head body 1, and is threadedly connected to the casing head body 1. There are multiple hexagon socket screws 5 in each set. The locking seat 11 and the locking tooth 12 are mutually compatible.

[0022] The implementation principle of this embodiment is as follows: The equipment first provides pressure through the grease injection valve 6, thereby pushing the piston 9 and the slip seat 11. At the same time, the slip seat 11 can activate the slip teeth 12, so that the slip teeth 12 can tightly grip the casing column. The barbs on the piston 9 and the clamping block 10 are interlocked to prevent the piston 9 from falling back and causing the slip to fail after the pressure source is lost. The equipment can remotely activate the slip at the bottom of the casing head hydraulically, which can avoid direct contact between on-site personnel and the equipment, making it safe and reliable.

[0023] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An emergency sleeve head, comprising a sleeve head body (1), characterized in that: The inner hole of the sleeve head body (1) is equipped with a slip seat (11), and the inner hole of the sleeve head body (1) is equipped with a slip tooth (12) located outside the slip seat (11). The inner hole of the sleeve head body (1) is fixedly connected with a locking block (10) located near the slip seat (11). The outer side of the sleeve head body (1) is provided with a hydraulic cylinder cover (7). One end of the outer side of the hydraulic cylinder cover (7) is equipped with a hydraulic cylinder inner sleeve (8). The inside of the hydraulic cylinder cover (7) is inserted with an internal hexagon screw (5). The other end of the outer side of the hydraulic cylinder cover (7) is equipped with a grease injection valve (6). The outer circular surface of the hydraulic cylinder inner sleeve (8) is equipped with a piston (9).

2. The emergency sleeve head according to claim 1, characterized in that: A gate valve (4) is installed at one end of the outer side of the casing head body (1), and a needle valve (2) and a pressure gauge (3) are installed at the other end of the outer side of the casing head body (1).

3. The emergency sleeve head according to claim 1, characterized in that: The outer side of the locking block (10) is provided with barbs, and the outer surface of the upper end of the piston (9) is provided with barbs. The barbs on the outer side of the locking block (10) and the barbs on the outer side of the piston (9) are interlocked. The piston (9) is placed between the inner sleeve of the liquid cylinder (8) and the sleeve head body (1) and slides between the inner sleeve of the liquid cylinder (8) and the sleeve head body (1).

4. The emergency sleeve head according to claim 1, characterized in that: Two sets of hexagon socket screws (5) are provided. One set of hexagon socket screws (5) extends through the cylinder cover (7) to the inside of the cylinder inner sleeve (8) and is threadedly connected to the cylinder inner sleeve (8). The other set of hexagon socket screws (5) extends through the cylinder cover (7) to the inside of the sleeve head body (1) and is threadedly connected to the sleeve head body (1). Multiple hexagon socket screws (5) are provided in each set. The slip seat (11) and slip teeth (12) are mutually compatible.

Images