Novel self-sealing anti-overflow wellhead device
By designing a self-sealing anti-overflow wellhead device, and utilizing a combination of sealing rings and pressure rings, the problem of oil tubing contamination during oil well operations was solved, achieving effective sealing of the wellhead, ensuring safe production, and reducing the risk of contamination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANHU LONGXIN PETROLEUM MASCH CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-04-24
AI Technical Summary
During oil well operations, the problem of fluid contamination of the work site by tubing, especially the serious contamination of the wellhead and surface equipment, affects safe production and costs.
A self-sealing anti-overflow wellhead device was designed, including drill pipe, sealing ring, flange, casing and sealing ring, which are connected by bolts and nuts. The design of the sealing ring and pressure ring realizes the sealing of the drill pipe and the main wellhead to prevent overflow.
It effectively prevents oil from contaminating the work site, reduces the risk of pollution, and improves safety and production efficiency.
Smart Images
Figure CN224161694U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil production technology, specifically a novel self-sealing anti-overflow wellhead device. Background Technology
[0002] In oil well operations, to avoid formation contamination, reduce operating costs, improve oil and gas recovery rates, and ensure safe production, non-killing well operation technology is one of the main measures commonly adopted by the petroleum industry both domestically and internationally. Because the unloading and removal of tubing during non-killing well operations takes place under external (open-pit) conditions, it is inevitable that the tubing will carry fluid (ranging from 2 to 3 tons to 7 to 8 tons of oily water), causing serious pollution to the work site (the Christmas tree and surface, and the surface where the tubing and sucker rod are stored). Summary of the Invention
[0003] The purpose of this invention is to provide a novel self-sealing anti-overflow wellhead device to solve the problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0005] This utility model proposes a novel self-sealing anti-overflow wellhead device, including a drill rod inserted into the ground. A sealing ring and a flange are fitted on the drill rod. The flange is fastened to the ground by a second bolt and a second nut. A sleeve is provided on the flange. The other end of the sleeve is provided with a main wellhead. A sealing ring is provided on the main wellhead to stabilize the drill rod. A pressure ring is provided on the sealing ring. The pressure ring is connected to the main wellhead by a first bolt and a first nut to press the sealing ring tightly.
[0006] Preferably, the flange is provided with a positioning boss, and the sealing ring is provided with a positioning groove corresponding to the positioning boss.
[0007] Preferably, a flange is welded to one end of the casing, and a main wellhead is welded to the other end of the casing.
[0008] Preferably, the inner diameter of the casing is larger than the outer diameter of the drill pipe.
[0009] Preferably, the cross-section of the pressure ring is I-shaped.
[0010] Preferably, the sealing ring has an annular groove that deforms when it is fitted onto the drill pipe, and the pressure ring has a pressure groove that fixes the sealing ring. The sealing ring is inserted into the main wellhead to fix the drill pipe.
[0011] The present invention has the following advantages: a sealing ring is used to fix the pressure ring on the main body wellhead. The sealing ring is provided with an annular groove that deforms when it is fitted onto the drill pipe. The pressure ring is provided with a pressure groove to fix the sealing ring, thereby achieving the sealing ring to seal the gap between the drill pipe and the main body wellhead, forming an anti-overflow effect. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure.
[0014] The attached diagram lists the components represented by each number as follows:
[0015] In the diagram: 1. Drill pipe; 2. First nut; 3. First bolt; 4. Pressure ring; 5. Sealing ring; 6. Main wellhead; 7. Casing; 8. Second nut; 9. Second bolt; 10. Flange; 11. Sealing ring. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Please see Figure 1 As shown, this utility model is a novel self-sealing anti-overflow wellhead device, including a drill rod 1 inserted into the ground. A sealing ring 11 and a flange 10 are fitted on the drill rod 1. The flange 10 is fastened to the ground by a second bolt 9 and a second nut 8. A sleeve 7 is provided on the flange 10, and the inner diameter of the sleeve 7 is larger than the outer diameter of the drill rod 1. A main wellhead 6 is provided at the other end of the sleeve 7. A sealing ring 5 is provided on the main wellhead 6 to stabilize the drill rod 1. A pressure ring 4 is provided on the sealing ring 5, and the pressure ring 4 has an I-shaped cross-section. The pressure ring 4 is connected to the main wellhead 6 by a first bolt 3 and a first nut 2 to press the sealing ring 5 tightly.
[0018] In this utility model, the flange 10 is provided with a positioning boss, and the sealing ring 11 is provided with a positioning groove corresponding to the positioning boss, so as to facilitate the quick positioning of the sealing ring 11 on the flange 10. The flange 10 is welded to one end of the sleeve 7, and the main wellhead 6 is welded to the other end of the sleeve 7.
[0019] In this invention, the sealing ring 5 is provided with an annular groove that deforms when it is fitted onto the drill rod 1, and the pressure ring 4 is provided with a pressure groove that fixes the sealing ring 5. The sealing ring 5 is inserted into the main wellhead 6 to fix the drill rod 1, thereby achieving the sealing effect of the sealing ring 5 sealing the gap between the drill rod 1 and the main wellhead 6, forming an anti-overflow effect.
[0020] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A novel self-sealing anti-overflow wellhead device, comprising a drill pipe (1) inserted into the ground, characterized in that: A sealing ring (11) and a flange (10) are fitted on the drill pipe (1). The flange (10) is fastened to the ground by a second bolt (9) and a second nut (8). A sleeve (7) is provided on the flange (10). A main wellhead (6) is provided at the other end of the sleeve (7). A sealing ring (5) is provided on the main wellhead (6) to stabilize the drill pipe (1). A pressure ring (4) is provided on the sealing ring (5). The pressure ring (4) is connected to the main wellhead (6) by a first bolt (3) and a first nut (2) to press the sealing ring (5) tightly.
2. The novel self-sealing anti-overflow wellhead device according to claim 1, characterized in that: The flange (10) is provided with a positioning boss, and the sealing ring (11) is provided with a positioning groove corresponding to the positioning boss.
3. The novel self-sealing anti-overflow wellhead device according to claim 1, characterized in that... The casing (7) has a flange (10) welded to one end and a main wellhead (6) welded to the other end.
4. A novel self-sealing anti-overflow wellhead device according to claim 1, characterized in that... The inner diameter of the casing (7) is greater than the outer diameter of the drill pipe (1).
5. A novel self-sealing anti-overflow wellhead device according to claim 1, characterized in that... The cross-section of the pressure ring (4) is I-shaped.
6. A novel self-sealing anti-overflow wellhead device according to claim 1, characterized in that... The sealing ring (5) is provided with an annular groove that deforms when it is fitted onto the drill rod (1). The pressure ring (4) is provided with a pressure groove that fixes the sealing ring (5). The sealing ring (5) is inserted into the main wellhead (6) to fix the drill rod (1).