Well kick treatment device for brine well drilling construction
By introducing a bar reinforcement structure into the blowout preventer, the jig barrel and clamp form an annular seal, solving the problem of unstable clamping of the blowout preventer in the low pressure state, achieving higher clamping stability and blowout preventer effect.
Patent Information
- Application Number
- CN202422430475.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing blowout preventer clamping the bar in a low pressure state is unstable, easy to break, and the blowout preventive effect is not good at low pressure.
A well surge treatment device including a blowout preventer, a bar sealer and a bar reinforcement structure is designed. The bar reinforcement structure consists of a reinforcement shell, a clamp and a jig. The jig is moved vertically through the driving structure to extend the clamp length and form a ring on the clamp to seal the high-pressure fluid.
It improves the clamping stability of the bar in the blowout preventer, reduces the risk of disconnection, and can effectively block the high-pressure oil, gas and water in a low-pressure state.
Smart Images
Figure CN223048779U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of blowout preventers, and particularly to a well kick treatment device for brine well drilling construction. Background Art
[0002] During operations such as well testing, well workover, and well completion, in order to avoid blowout accidents at the drill pipe, a blowout preventer is usually set at the polished rod at the exposed part of the drill pipe at the wellhead, integrating the functions of full closure and half closure to control the blowout of high-pressure oil, gas, and water. When the oil and gas pressure in the well is very high, the blowout preventer can seal the wellhead (close it tightly). When heavy mud is pumped into the drill pipe, there is a four-way connection under the ram, which can replace the gas-invaded mud and increase the pressure of the liquid column in the well to suppress the ejection of high-pressure oil and gas. However, when the pressure is slightly low, the blowout prevention effect is not good. In addition, the clamping and sealing of the polished rod in most blowout preventers are mostly set through rams, with a small contact surface and a small clamping and supporting force, making the polished rod prone to breakage and disconnection.
[0003] Therefore, the present application provides a well kick treatment device for brine well drilling construction, which improves the clamping stability of the polished rod and reduces the risk of breakage and disconnection; at the same time, it improves the blowout performance at low pressure.
[0004] Application Content
[0005] The purpose of the present application is to solve the problems existing in the prior art, and to propose a well kick treatment device for brine well drilling construction.
[0006] In order to achieve the above purpose, the present application adopts the following technical solutions:
[0007] A well kick treatment device for brine well drilling construction, including a blowout preventer, a polished rod seal arranged above the blowout preventer, and a polished rod reinforcement structure connected below the blowout preventer;
[0008] The polished rod reinforcement structure includes a tubular reinforcement shell, a first flange is provided at the lower end of the reinforcement shell, a fixing ring is fixed at the upper end inside the reinforcement shell, several clamping plates are arranged in a circular array close to the inner wall below the fixing ring, the width of the vertical section of each clamping plate gradually increases from top to bottom, and a clamping cylinder is arranged inside the reinforcement shell and can move vertically driven by a driving structure.
[0009] Preferably, several of the clamping plates are jointly assembled into a ring.
[0010] Preferably, a second flange is provided below the blowout preventer, and a third flange is provided at the upper end of the reinforcement shell and is matched with the second flange.
[0011] Preferably, the driving structure includes a plurality of hydraulic rods located on the inner wall of the reinforcement shell, and the extending end of the hydraulic rod is connected to the end of the clamping cylinder.
[0012] Preferably, anti-slip lines are provided on the inner wall of the clamping plate.
[0013] Preferably, the inner wall at the lower end of the reinforcement shell flares out.
[0014] Compared with the prior art, the present application provides a well kick treatment device for brine well drilling construction, which has the following beneficial effects:
[0015] 1. During use, the driving structure drives the clamping cylinder to descend, and the clamping cylinder presses against several clamping plates to close and press against the smooth wall of the polished rod, extending the clamping length of the polished rod and improving the clamping and fixing ability of the polished rod after breaking and disconnecting in the blowout preventer, that is, improving the anti-breaking and disconnecting ability.
[0016] 2. Several clamping plates are jointly assembled into a ring. After the clamping cylinder abuts against the clamping plates to clamp the polished rod, a clamping ring is formed, thereby blocking the internally surging high-pressure oil, gas, water, etc. In this way, even in a low-pressure state, a certain anti-blowout effect can still be achieved.
[0017] Other advantages, objectives, and features of the present application will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional schematic diagram of the present application.
[0019] Figure 2 It is a cross-sectional schematic diagram of the present application.
[0020] Figure 3 It is a cross-sectional schematic diagram of the polished rod reinforcement structure of the present application.
[0021] Figure 4 It is a schematic diagram of the separation of the clamping plate and the clamping cylinder of the present application.
[0022] Figure 5 It is a cross-sectional schematic diagram of the cooperation between the clamping plate and the clamping cylinder of the present application.
[0023] Figure 6 It is a cross-sectional schematic diagram of the connection between the clamping cylinder and the connection ring of the present application.
[0024] In the figure: 1. Blowout preventer; 2. Polished rod seal; 3. Reinforcement shell; 4. Fixed ring; 5. Clamping plate; 6. Clamping cylinder; 7. Driving structure; 8. Connection ring; 9. Flange one; 10. Flange two; 11. Flange three. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the attached Figures 1-6 , and it is obvious that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0026] Example 1. To solve the problems existing in the prior art, this example provides a well kick treatment device for brine well drilling construction, including a blowout preventer 1, a polished rod seal 2 arranged above the blowout preventer 1, and a polished rod reinforcement structure connected below the blowout preventer 1;
[0027] The polished rod reinforcement structure includes a tubular reinforcement shell 3. A first flange 9 is provided at the lower end of the reinforcement shell 3. A fixed ring 4 is fixed at the upper end inside the reinforcement shell 3. A plurality of clamping plates 5 are annularly arranged close to the inner wall at the lower end of the fixed ring 4. The vertical cross-sectional width of each clamping plate 5 gradually increases from top to bottom. A clamping cylinder 6 cooperating with the clamping plates 5 is arranged inside the reinforcement shell 3. The clamping cylinder 6 can move vertically driven by a driving structure 7.
[0028] Details of the principle of this example:
[0029] A well kick treatment device for brine well drilling construction includes a blowout preventer 1, a polished rod seal 2 arranged above the blowout preventer 1, and a polished rod reinforcement structure connected below the blowout preventer 1.
[0030] The blowout preventer 1 is used to clamp and support the polished rod and perform pressure relief and sealing.
[0031] The polished rod seal 2 closes the end of the polished rod to prevent leakage.
[0032] A fourth flange is provided above the blowout preventer 1, and a fifth flange is provided below the polished rod seal 2. The fourth flange and the fifth flange are tightly connected by bolts, so that the blowout preventer 1 and the polished rod seal 2 are closely connected.
[0033] The polished rod reinforcement structure includes a tubular reinforcement shell 3. A first flange 9 is provided at the lower end of the reinforcement shell 3. The first flange 9 is connected to the ground installation flange by bolts, and is matched with the hoisting of the traditional blowout preventer 1, making the installation of the blowout preventer 1 more stable. A fixed ring 4 is fixed at the upper end inside the reinforcement shell 3. A plurality of clamping plates 5 are annularly arranged close to the inner wall at the lower end of the fixed ring 4. The vertical cross-sectional width of each clamping plate 5 gradually increases from top to bottom. A clamping cylinder 6 cooperating with the clamping plates 5 is arranged inside the reinforcement shell 3. The clamping cylinder 6 can move vertically driven by a driving structure 7 fixed at the lower end of the inner wall of the reinforcement shell 3. The outer wall of the clamping cylinder 6 fits with the inner wall of the reinforcement shell 3, and the inner wall of the clamping cylinder 6 is conical and adapted to the clamping plates 5.
[0034] According to the above technical solution:
[0035] In use, the blowout preventer 1 is hoisted on the hanger at the wellhead through the hanging ears, and the polished rod seal 2 is fastened above the blowout preventer 1 to seal the connection between the blowout preventer 1 and the upper end of the polished rod. The flange one 9 of the reinforcement shell 3 is connected to the ground installation flange through bolts, making the installation of the blowout preventer 1 more stable. The polished rod is installed inside the blowout preventer 1 and is blocked by the gate inside the blowout preventer 1. The driving structure 7 drives the clamping cylinder 6 to descend. The clamping cylinder 6 closes against several clamping plates 5 and presses against the smooth wall of the polished rod, extending the clamping length of the polished rod and improving the clamping and fixing ability of the polished rod after breakage and disconnection inside the blowout preventer 1, that is, improving the anti-breakage and disconnection ability.
[0036] In the preferred solution of this embodiment, the fixed ring 4 is rotatably installed at the upper end of the inner wall of the reinforcement shell 3, and a connecting ring 8 is rotatably installed at the lower end of the clamping cylinder 6. The extending end of the driving structure 7 is connected to the connecting ring 8. In this way, after the clamping cylinder 6 abuts against the clamping plate 5 to clamp the polished rod, it does not affect the rotation of the polished rod.
[0037] In this embodiment, a plurality of counterbore holes are annularly arranged in the inner ring of the fixed ring 4, and screw holes corresponding to the counterbore holes one by one are provided on the side wall of the reinforcement shell 3. A countersunk screw is connected in the counterbore hole and the screw hole together. Thus, the fixed connection between the fixed ring 4 and the reinforcement shell 3 is realized.
[0038] Embodiment 2, in a further embodiment of this solution, several of the clamping plates 5 are jointly assembled into a ring. After the clamping cylinder 6 abuts against the clamping plate 5 to clamp the polished rod, a clamping ring is formed to block high-pressure oil, gas, water, etc. surging inside. In this way, even in a low-pressure state, a certain anti-gushing effect can still be achieved.
[0039] Embodiment 3, in a further embodiment of this solution, a flange two 10 is provided below the blowout preventer 1, and a flange three 11 matching the flange two 10 is provided at the upper end of the reinforcement shell 3. The flange two 10 and the flange three 11 are fastened to connect the reinforcement shell 3 and the blowout preventer 1 through bolts, realizing the installation of the reinforcement structure.
[0040] Embodiment 4, in a further embodiment of this solution, the driving structure 7 includes a plurality of hydraulic rods located on the inner wall of the reinforcement shell 3, and the extending end of the hydraulic rod is connected to the end of the clamping cylinder 6. The lifting of the clamping cylinder 6 is controlled by the extension and contraction of the hydraulic rod.
[0041] Embodiment 5, in a further embodiment of this solution, anti-slip patterns are provided on the inner wall of the clamping plate 5. The friction between the clamping plate 5 and the polished rod is increased, thereby improving the clamping stability of the polished rod.
[0042] Embodiment 6, in a further embodiment of this solution, refer to the appendix Figure 3 As shown, the inner wall at the lower end of the reinforcement shell 3 is flared. Sufficient installation space is provided for the driving structure 7 to avoid contact with the polished rod.
[0043] As described above, it is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and the inventive concept of the present application, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.
[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0045] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.
Claims
1. A well kick treatment device for brine well drilling construction, characterized in that: It comprises a blowout preventer (1), a bare rod sealer (2) arranged above the blowout preventer (1), and a bare rod reinforcement structure connected below the blowout preventer (1); The bare rod reinforcement structure comprises a tubular reinforcement shell (3), a flange (9) is provided at the lower end of the reinforcement shell (3), a fixing ring (4) is fixed at the upper end of the reinforcement shell (3), a plurality of clamping plates (5) are arranged in a circular array close to the inner wall at the lower end of the fixing ring (4), the vertical cross-sectional width of each clamping plate (5) gradually increases from top to bottom, a clamping cylinder (6) matched with the clamping plate (5) is provided in the reinforcement shell (3), and the clamping cylinder (6) is driven by a driving structure (7) so as to be able to move vertically.
2. A well kick treatment device for brine well drilling construction according to claim 1, characterized in that: A plurality of the splints (5) are assembled together to form a circular ring.
3. A well kick treatment device for brine well drilling construction according to claim 1, characterized in that: A second flange (10) is provided at the bottom of the blowout preventer (1), and a third flange (11) matching with the second flange (10) is provided at the upper end of the reinforcement shell (3).
4. A well kick treatment device for brine well drilling construction according to claim 1, characterized in that: The driving structure (7) comprises a plurality of hydraulic rods located on the inner wall of the reinforcement shell (3), and the extended ends of the hydraulic rods are connected to the ends of the clamping barrel (6).
5. A well kick treatment device for brine well drilling construction according to claim 1, characterized in that: The inner wall of the clamping plate (5) is provided with anti-slip patterns.
6. A well kick treatment device for brine well drilling construction according to claim 4, characterized in that: The inner wall of the lower end of the reinforcement shell (3) is expanded.