Wellhead drainage device for treating hidden danger well

Abstract

The utility model relates to the technical field of drainage devices, and discloses a hidden danger well treatment wellhead drainage device which comprises a central pipe, a wedge-shaped locking barrel, a rubber barrel and a slip. A first joint for connecting a valve is arranged at the top end of the central pipe; the outer side of the central pipe is sleeved with a wedge-shaped locking barrel and a glue barrel; a bearing ring is arranged on the outer side of the center pipe, and the top face of the bearing ring is slidably connected with a slip. The tops of the slips abut against the bottom of the glue barrel; the bottom of the wedge-shaped locking barrel can be inserted between the glue barrel and the outer wall of the central pipe and between the slip and the outer wall of the central pipe, and the wedge-shaped locking barrel is used for controlling the glue barrel and the slip to be close to or away from the central pipe; the wedge-shaped locking barrel is matched with the glue barrel, so that a gap between the outer wall of the central pipe and the inner wall of the sleeve can be blocked; the position of the central pipe can be limited by abutting the slip insert arranged on the slip against the inner wall of the sleeve. The overflow liquid can be conveniently recycled by controlling the flow speed of the liquid in the sleeve through the valve, and safety is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drainage device technical field, concretely relates to a hidden danger well management well mouth drainage device. BACKGROUND

[0002] At present, with the development of domestic oil and gas field into the second half period, more and more long-term oil and gas water wells are shut down due to insufficient production capacity, and after shutdown, they are not timely sealed and abandoned, but only the wellhead is simply removed, and after the wellhead is removed, the casing is completely exposed or a blind plate is installed on the exposed casing to prevent overflow due to the influence of geological changes on formation pressure. With the passage of time, the wellhead completely exposed or the wellhead after welding the blind plate will be corroded and oxidized, resulting in damage. For environmental protection and safety considerations, all major oilfields are carrying out abandonment and plugging operations on shut-down wells that meet the abandonment requirements. Due to the corrosion and damage of the above-mentioned wellhead, it cannot meet the installation requirements of the abandonment construction equipment, and casing cutting and buckle forming technology needs to be used to re-establish the wellhead. During the reconstruction of the wellhead, some wellheads will overflow after the blind plate is removed, and the conventional method is to arrange a pollution prevention device at the wellhead to collect the overflow liquid. However, this method has great well control and environmental risk, so it is necessary to invent a drainage device to ensure the safety and environmental protection of the construction.

[0003] The existing pollution prevention device has the following defects: (1) if the overflow volume or speed is high, the overflow liquid cannot be recovered in time; (2) if the well pressure or trapped pressure is suddenly released with the occurrence of overflow, it cannot be controlled, which can easily cause personnel, equipment damage or environmental pollution. UTILITY MODEL CONTENTS

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a hidden danger well management well mouth drainage device to solve the problems in the prior art that during the reconstruction of the wellhead, some wellheads will overflow after the blind plate is removed, and the well pressure or trapped pressure is suddenly released with the occurrence of overflow, which cannot be controlled, and can easily cause personnel, equipment damage or environmental pollution.

[0005] A hidden danger well management well mouth drainage device, comprising a central pipe, a wedge-shaped locking barrel, a rubber barrel and a slip;

[0006] The first joint for connecting the valve is arranged at the top end of the central pipe; the wedge-shaped locking barrel and the rubber barrel are sleeved outside the central pipe; the supporting ring is arranged outside the central pipe; the slip is slidably connected to the top surface of the supporting ring; the top of the slip abuts against the bottom of the rubber barrel; the bottom of the wedge-shaped locking barrel can be inserted between the rubber barrel and the outer wall of the central pipe and between the slip and the outer wall of the central pipe, and the wedge-shaped locking barrel is used to control the rubber barrel and the slip to approach or move away from the central pipe;

[0007] The wedge-shaped locking barrel, in conjunction with the rubber barrel, can seal the gap between the outer wall of the central tube and the inner wall of the casing; the position of the central tube can be restricted by the locking teeth on the locking plates abutting against the inner wall of the casing.

[0008] Furthermore, the top surface of the support ring is provided with several radially arranged slide rails, which are used for sliding connection with the slip.

[0009] Furthermore, the slide rail is a T-shaped slide rail, and the bottom of the latch is provided with a T-shaped groove that matches the T-shaped groove.

[0010] Furthermore, the number of kava is at least two.

[0011] Furthermore, it also includes a locking thread barrel; a first thread is provided on the outer side of the central tube, and a second thread adapted to the first thread is provided on the inner side of the locking thread barrel; the locking thread barrel is fixedly connected to the bottom of the wedge-shaped locking barrel.

[0012] Furthermore, a second connector is provided at the bottom end of the central tube.

[0013] Beneficial effects: By sealing the gap between the outer wall of the central tube and the inner wall of the casing using a wedge-shaped locking barrel and a rubber barrel, the fluid inside the casing can flow along the central tube. The fluid flow within the casing can then be controlled via a valve located at the first joint at the top of the central tube. This valve-controlled flow rate facilitates the recovery of overflow fluid, preventing personnel, equipment, and environmental pollution caused by sudden releases of well pressure or trap pressure. The placement of the central tube is restricted by slips, ensuring the normal operation of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the support ring structure in an embodiment of the present utility model. Figure One

[0017] Figure 3 This is a schematic diagram of the support ring structure in an embodiment of the present utility model. Figure Two .

[0018] In the diagram: 1. Central tube; 101. First thread; 2. First connector; 3. Second connector; 4. Support ring; 401. Guide rail; 5. Clip; 6. Glue bucket; 7. Wedge-shaped locking bucket; 8. Locking thread bucket; 801. Second thread. Detailed Implementation

[0019] 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, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] It should be noted that the embodiments and features involved in the embodiments of this utility model can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0021] like Figures 1 to 3 The device shown is a wellhead diversion device for treating hidden danger wells, including a central pipe 1, a wedge-shaped locking barrel 7, a rubber barrel 6, and slips 5. The top of the vertically arranged central pipe 1 is equipped with a first connector 2 for connecting a valve. The wedge-shaped locking barrel 7 and the rubber barrel 6 are sleeved on the outside of the central pipe 1. A support ring 4 is provided on the outside of the central pipe 1, and several radially extending tracks are provided on the top surface of the support ring 4. Slips 5 are slidably connected on the tracks. The top of the slips 5 abuts against the bottom of the rubber barrel 6. The bottom end of the wedge-shaped locking barrel 7 can slide along the outer wall of the central pipe 1. The wedge-shaped locking barrel 7 moves downward and is successively inserted between the glue barrel 6 and the outer wall of the central tube 1, and between the slip 5 and the outer wall of the central tube 1. The distance between the glue barrel 6 and the slip 5 and the central tube 1 is controlled by the upward or downward movement of the wedge-shaped locking barrel 7. The wedge-shaped locking barrel 7 is used to expand the glue barrel 6. The wedge-shaped locking barrel 7 and the glue barrel 6 cooperate to seal the gap between the outer wall of the central tube 1 and the inner wall of the sleeve. The slip 5 abuts against the inner wall of the sleeve through the slip teeth set on the slip 5, fixing the position of the central tube 1.

[0022] In the embodiment, the wedge-shaped locking barrel 7 and the glue barrel 6 seal the gap between the outer wall of the central pipe 1 and the inner wall of the sleeve, so that the liquid in the sleeve can flow along the central pipe 1, and then the liquid in the sleeve can be controlled through the valve at the first joint 2 arranged at the top of the central pipe 1. The flow rate of the liquid in the sleeve can be controlled through the valve to facilitate the recovery of the overflow liquid and avoid the problems of personnel, equipment damage and environmental pollution caused by the sudden release of well pressure or trap pressure.

[0023] The central pipe 1 is provided with a plurality of clamps 5 on the outer side in a circumferential direction, and the number of the clamps 5 is at least two. The guide rail 401 arranged on the supporting ring 4 is a T-shaped guide rail 401, and the bottom of the clamp 5 is provided with a T-shaped groove matched with the T-shaped guide rail 401.

[0024] In the embodiment, the T-shaped groove and the T-shaped guide rail 401 are arranged to limit the movement track of the clamp 5, and the clamp 5 only moves in the radial direction of the supporting ring 4 and cannot move upward or downward out of the connection with the guide rail 401.

[0025] The central pipe 1 is provided with a second joint 3 at the bottom end, the supporting ring 4 is arranged between the first joint 2 and the second joint 3, and the central pipe 1, the first joint 2, the second joint 3 and the supporting ring 4 are integrally formed. The first joint 2 and the second joint 3 are correspondingly provided with threads for convenient connection.

[0026] In the embodiment, the second joint 3 is used for installing other equipment, the central pipe 1, the first joint 2, the second joint 3 and the supporting ring 4 are integrally formed, the structure is more stable, and the gap between the supporting ring 4 and the central pipe 1 can be avoided to improve the sealing performance.

[0027] The outer wall of the central pipe 1 is provided with a second thread 801, the locking barrel thread is threadedly connected at the second thread 801, the inner side of the locking barrel thread is provided with a second thread 801 matched with the first thread 101, the bottom of the locking barrel thread abuts against the wedge-shaped locking barrel 7, and the locking barrel thread is used for controlling the downward movement of the wedge-shaped locking barrel 7.

[0028] In the embodiment, the locking barrel thread is threadedly connected with the central pipe 1, the connection is tight, and the upward or downward movement of the locking barrel thread is convenient to control. When the locking barrel thread moves downward, the bottom of the locking barrel thread abuts against the wedge-shaped locking barrel 7 to push the wedge-shaped locking barrel 7 to move downward. When the locking barrel thread moves upward, the glue barrel 6 shrinks to push the wedge-shaped locking barrel 7 to move upward. Preferably, the locking barrel thread and the wedge-shaped locking barrel 7 are an integral structure, and the movement of the wedge-shaped locking barrel 7 is more convenient.

[0029] Working principle: the device is inserted into the casing from the top of the casing, the locking barrel is rotated, the wedge-shaped locking barrel 7 is pushed down, the bottom of the wedge-shaped locking barrel 7 moves along the outer wall of the central pipe 1, and the rubber barrel 6 and the slip 5 are pushed to move close to the inner wall of the casing; the inner diameter and the outer diameter of the rubber barrel 6 gradually increase and abut against the inner wall of the casing, the rubber barrel 6 cooperates with the wedge-shaped locking barrel 7 to seal the gap between the outer wall of the central pipe 1 and the inner wall of the casing, so that the liquid is prevented from flowing out of the gap; the side of the slip 5 away from the central pipe 1 is provided with slip teeth, the slip teeth abut against the inner wall of the casing and fix the central pipe 1, so that the horizontal movement and the vertical movement of the central pipe 1 are avoided, and the normal use of the device is ensured.

[0030] Although the preferred embodiments of the present application have been described, those skilled in the art who know the basic inventive concept can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and changes.

Claims

1. A wellhead diversion device for treating hidden danger wells, characterized in that, Includes a central tube, a wedge-shaped locking barrel, a rubber barrel, and a locking clip; The top of the central tube is provided with a first connector for connecting a valve; a wedge-shaped locking barrel and a rubber barrel are sleeved on the outside of the central tube; a support ring is provided on the outside of the central tube, and a slip is slidably connected to the top surface of the support ring; the top of the slip abuts against the bottom of the rubber barrel; the bottom of the wedge-shaped locking barrel can be inserted between the rubber barrel and the outer wall of the central tube and between the slip and the outer wall of the central tube, and the wedge-shaped locking barrel is used to control the rubber barrel and the slip to move closer to or further away from the central tube; The wedge-shaped locking barrel, in conjunction with the rubber barrel, can seal the gap between the outer wall of the central tube and the inner wall of the casing; the position of the central tube can be restricted by the locking teeth on the locking plates abutting against the inner wall of the casing.

2. The wellhead diversion device for treating hidden danger wells according to claim 1, characterized in that, The top surface of the support ring is provided with several radially arranged slide rails, which are used for sliding connection with the slip.

3. The wellhead diversion device for treating hidden danger wells according to claim 2, characterized in that, The slide rail is a T-shaped slide rail, and the bottom of the latch is provided with a T-shaped groove that matches the T-shaped groove.

4. The wellhead diversion device for treating hidden danger wells according to claim 3, characterized in that, The number of kava is at least two.

5. The wellhead diversion device for treating hidden danger wells according to claim 1, characterized in that, It also includes a locking thread barrel; a first thread is provided on the outside of the central tube, and a second thread adapted to the first thread is provided on the inside of the locking thread barrel; the locking thread barrel is fixedly connected to the bottom of the wedge-shaped locking barrel.

6. The wellhead diversion device for treating hidden danger wells according to claim 1, characterized in that, A second connector is provided at the bottom end of the central tube.

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