CN107989565A - Environmentally friendly wellhead for production - Google Patents

Abstract

The invention discloses an environment-friendly oil production wellhead device, which comprises a body, a gland, a self-sealing rubber core, a chamber baffle, a nozzle, an air inlet joint, a discharge joint and a single-flow valve joint. The main body is a hollow cylindrical structure, the cavity baffle and the self-sealing rubber core are arranged in the main body, and are compressed by the gland. The lower part of the main body is connected to the air inlet joint, the discharge joint and the check valve joint. The air intake joint can be connected to the steam boiler. The steam enters the nozzle through the air intake joint, and then is sprayed into the main body by the nozzle to clean the oil on the oil rod and the outer wall of the oil pipe, and self-sealing at the same time. The rubber core scrapes the oil on the outer wall of the oil pipe and oil rod, and the cleaned oil is sucked out by the sewage suction pump through the sewage discharge joint. The environment-friendly oil production wellhead device can prevent dirt and crude oil from cleaning oil pipes and sucker rods from spilling on the ground during oil production well maintenance and deep well pump inspection construction, and prevent environmental pollution.

Description

Environmental protection oil production wellhead device

technical field

The invention relates to the technical field of overhaul and maintenance of oil production wells and oil field production equipment, in particular to an environment-friendly oil production wellhead device.

Background technique

Oil production and production wells in oil fields are repaired and inspected due to downhole accidents. When deep well pumps are constructed, the oil pipes and sucker rods from the downhole to the ground must be cleaned on the ground with a steam boiler. Not only is the construction slow, but also a lot of oil and crude oil are spilled on the ground during the cleaning process. , causing serious environmental pollution, there is an urgent need for a more efficient and environmentally friendly construction technology. In addition, in the previous cleaning method, since the oil pipe and the sucker rod are placed flat on the ground, the cleaning is not clean.

Contents of the invention

Purpose of the invention: The purpose of the invention is to address the deficiencies in the current technology and provide an environmentally friendly oil production wellhead device to prevent environmental pollution caused by crude oil spilling on the ground during the cleaning of the oil rod and tubing.

Technical solution: In order to achieve the above purpose, the present invention provides an environmentally friendly oil production wellhead device, including a body, a gland, a self-sealing rubber core, a cavity baffle, a nozzle, an air inlet joint, a discharge joint and a single flow valve joint; the body It is a hollow cylindrical structure with a reduced diameter at the lower end of the inner circle. The reduced diameter part is a rounded table structure with a larger diameter at the lower end and a smaller diameter at the upper end. A circle of mounting holes is evenly arranged on the inner wall of the rounded table structure. The hollow part of the main body above the diameter inner cavity and the reduced diameter inner cavity. The nozzle is installed in the installation hole. The connected hole is located on the wall of the hollow part of the body above the reduced diameter at the opening of the inner wall of the body, and the hole connected to the discharge joint and the check valve joint is located on the wall of the reduced diameter part at the opening of the inner wall of the body; the cavity baffle is a ring Shaped structure, its section is "L" shape, welded on the bottom of the hollow inner cavity above the reduced diameter of the body, the hole connected to the air inlet joint is located in the closed gap formed by the cavity baffle and the body; the cavity baffle There is a self-sealing rubber core on the top, the self-sealing rubber core is a cylindrical structure made of oil-resistant rubber, coaxially installed in the body, and its wall is an inwardly concave arc structure; the gland is a ring structure, and the body The inner wall is connected, and the self-sealing rubber core is fixed in the body; the air inlet joint, discharge joint and check valve joint are all tubular structures, and a check valve core is arranged in the check valve joint, and the flow direction in the check valve joint is From the external environment of the body to the interior of the body.

As an improvement of this solution, the number of mounting holes is 4-10.

As an improvement of this solution, there are six mounting holes.

As an improvement of this solution, the angle between the axis of the installation hole and the axis of the body is 30-90°.

As an improvement of this solution, the angle between the axis of the installation hole and the axis of the body is 50°.

As an improvement of this solution, the gland and the body are connected by threads, a sealing ring is provided between the gland and the body, and a chamfer is provided at the lower end of the inner hole of the gland.

As an improvement of this solution, chamfers are provided at the corners of the cavity baffle.

As an improvement of this solution, the air inlet joint, the discharge joint and the single-flow valve joint are all connected to the main body through threads.

As an improvement of this solution, valves are provided on the inlet joint and the discharge joint, which can control the opening and closing of the intake joint and the discharge joint.

As an improvement of this solution, the spray head is connected to the installation hole through threads.

Beneficial effects: the environmental protection oil production wellhead device is installed at the wellhead during the actual construction process, the inlet joint is connected to the steam boiler, the discharge joint is connected to the sewage suction pump, the oil pipe and the oil rod enter the oil well through the inner hole of the environmental protection oil production wellhead device, due to the self-sealing The wall of the rubber core is concave inward, and the inside of the sealing rubber core should not be close to the oil pipe or oil rod. When the oil rod or oil pipe is lifted up, the steam boiler continuously injects steam into the air intake joint, the steam enters the gap between the cavity baffle and the body, and then is sprayed out through the nozzle, and the steam is sprayed through the nozzle to the outer wall of the oil rod or oil pipe At the same time, the self-sealing rubber core scrapes the residual oil on the outer wall of the oil pipe or oil rod. The cleaned oil is sucked out by the suction pump through the discharge joint, and discharged into other external volume boxes for the next step. During the cleaning process, the hot steam softens the oil stains, and the oil stains that are not firmly attached are taken away from the outer wall of the oil pipe and the oil rod by the hot steam ejected. . The single-flow valve joint is provided with a single-flow valve core, and its flow direction is from the external environment of the body to the inside of the body. When the sewage suction pump is working, the single-flow valve can be opened to maintain pressure balance, so that the oil in the body can be sucked At the same time, since the check valve can only flow in one direction, it is ensured that the oil in the body will not flow into the external environment through the check valve joint.

The environment-friendly oil production wellhead device of the present invention can prevent dirt and crude oil from cleaning oil pipes and sucker rods from spilling on the ground during oil production well maintenance and deep well pump inspection and construction, and prevent environmental pollution. In addition, the use of environmentally friendly oil production wellhead devices can shorten construction time, save construction costs, and reduce labor intensity.

Description of drawings

Fig. 1, the structural schematic diagram of described environment-friendly oil recovery wellhead device;

Figure 2, P-P cross-sectional view;

Figure 3, N-N cross-sectional view;

List of reference signs: 1. Body; 2. Gland; 3. Self-sealing rubber core; 4. Chamber baffle; 5. Nozzle; 6. Air intake joint; 7. Discharge joint; 8. Single flow valve joint; 9 , Single-flow spool; 1a, scraping chamber; 1b, cleaning chamber; 1c, installation hole.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

As shown in Figure 1, it is an environmentally friendly oil production wellhead device, including a body 1, a gland 2, a self-sealing rubber core 3, a cavity baffle 4, a nozzle 5, an air inlet joint 6, a discharge joint 7 and a single flow valve joint 8. The main body 1 is a hollow cylindrical structure, and the lower part of the main body 1 is provided with three holes, which are respectively connected with the air inlet joint 6, the discharge joint 7 and the check valve joint 8 through threads. Valves are arranged on the intake joint 6 and the discharge joint 7, which can control the opening and closing of the intake joint 6 and the discharge joint 7.

Figure 2 is a sectional view of the P-P section in Figure 1. It can be seen from the figure that the lower end of the inner circle of the body 1 has a reduced diameter, and the reduced diameter part is a rounded platform structure with a larger diameter at the lower end and a smaller diameter at the upper end. The diameter part is called the cleaning chamber 1b, and the cavity with a larger diameter on the upper part of the cleaning chamber 1b is called the scraping chamber 1a. There is a circle of installation holes 1c evenly arranged on the inner wall of the cleaning chamber 1b. The number of installation holes 1c is 6. The installation holes 1c are arranged obliquely. The angle between the axis of the installation holes 1c and the axis of the body 1 is 50°, which connects the cleaning chamber 1b and the scraping chamber. At the bottom of 1a, a nozzle 5 is installed in the installation hole 1c, and the spray head is connected to the installation hole 1c by threads. The hole connected to the inlet joint 6 is located at the bottom wall of the scraping chamber 1a at the opening of the inner wall of the body 1. The chamber baffle 4 is a ring-shaped structure with an "L" cross-section, which is welded to the bottom of the scraping chamber 1a. The corners of the chamber baffle 4 are provided with chamfers, and the hole connected to the air inlet joint 6 is opened on the inner wall of the body 1. Located in the closed gap formed by the cavity baffle 4 and the body 1; the self-sealing rubber core 3 is arranged above the cavity baffle 4, and the self-sealing rubber core 3 is a cylindrical structure made of oil-resistant rubber, coaxially installed in the scraping chamber 1a, Its wall surface is an inwardly concave arc-shaped structure; the gland 2 is a ring structure, which is connected with the upper inner wall of the scraping chamber 1a, and the self-sealing rubber core 3 is fixed in the scraping chamber 1a, and the gland 2 and the body 1 are connected by threads, and the gland A sealing ring is provided between 2 and the body 1, and a chamfer is provided at the lower end of the inner hole of the gland 2.

Fig. 3 is a sectional view of the N-N section in Fig. 1. It can be seen from the figure that the hole connected to the discharge joint 7 and the check valve joint 8 cleans the wall of the cavity 1b in the body 1; the air inlet joint 6, the discharge joint 7 and the check valve joint 8 Both are tubular structures, and a single-flow valve core 9 is arranged in the single-flow valve joint 8 , and the flow direction in the single-flow valve joint 8 is from the external environment of the body 1 to the interior of the body 1 .

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (10)

1. An environment-friendly oil production wellhead device, characterized in that it comprises a body (1), a gland (2), a self-sealing rubber core (3), a cavity baffle (4), a nozzle (5), an air inlet joint (6 ), a discharge joint (7) and a single flow valve joint (8); the body (1) is a hollow cylindrical structure, the lower end of the inner circle has a reduced diameter, and the reduced diameter part is a rounded table structure with a larger diameter at the lower end and a smaller diameter at the upper end , a circle of mounting holes (1c) is uniformly arranged on the inner wall of the rounded table structure, and the mounting holes (1c) communicate with the inner cavity of the reduced diameter and the hollow part of the body (1) above the reduced diameter inner cavity, and the mounting holes ( 1c) A nozzle (5) is installed inside, and the lower part of the body (1) is provided with three holes, which are respectively connected to the air inlet joint (6), the discharge joint (7) and the check valve joint (8), and the air intake joint (6 ) is located at the opening of the inner wall of the body (1) on the wall of the hollow part above the reduced diameter body (1), and the hole connected to the discharge joint (7) and the check valve joint (8) is located in the body (1) The opening of the inner wall is located on the wall surface of the reduced diameter part; the cavity baffle (4) is a ring structure with an "L" shape in section, welded to the bottom of the hollow inner cavity above the reduced diameter of the body (1), and the air inlet joint (6 ) is located in the closed gap formed by the cavity baffle (4) and the body (1) at the opening of the inner wall of the body (1); a self-sealing rubber core (3) is arranged above the cavity baffle (4), and the The self-sealing rubber core (3) is a cylindrical structure made of oil-resistant rubber, coaxially installed in the body (1), and its wall surface is an inwardly concave arc-shaped structure; the gland (2) is a ring structure, which is connected to the body (1) The inner wall is connected, and the self-sealing rubber core (3) is fixed in the body (1); the air inlet joint (6), the discharge joint (7) and the single flow valve joint (8) are all tubular structures, single flow A single-flow valve core (9) is arranged in the valve joint (8), and the flow direction in the single-flow valve joint (8) is from the external environment of the body (1) to the interior of the body (1). 2. An environment-friendly oil recovery wellhead device according to claim 1, characterized in that: the number of said installation holes (1c) is 4-10. 3. An environment-friendly oil recovery wellhead device according to claim 2, characterized in that: there are six installation holes (1c). 4. An environmentally friendly oil recovery wellhead device as claimed in claim 3, characterized in that: the included angle between the axis of the installation hole (1c) and the axis of the body (1) is 30-90°. 5. An environment-friendly oil production wellhead device according to claim 4, characterized in that the angle between the axis of the installation hole (1c) and the axis of the body (1) is 50°. 6. An environment-friendly oil recovery wellhead device as claimed in claim 5, characterized in that: the gland (2) is connected to the body (1) through threads, and a The sealing ring and the lower end of the inner hole of the gland (2) are provided with chamfers. 7. An environment-friendly oil production wellhead device according to claim 6, characterized in that: chamfers are provided at the corners of the cavity baffle (4). 8. An environment-friendly oil production wellhead device as claimed in claim 7, characterized in that: the air inlet joint (6), the discharge joint (7) and the check valve joint (8) and the body (1) are all threaded connect. 9. An environment-friendly oil recovery wellhead device as claimed in claim 8, characterized in that: the air inlet joint (6) and the discharge joint (7) are provided with valves, which can control the air intake joint (6) and the discharge joint (7) On and off. 10. An environment-friendly oil production wellhead device according to claim 9, characterized in that: the nozzle is connected to the installation hole (1c) through threads.