阅读说明：本技术 一种油井清防蜡剂投加管柱及方法 (Oil well paraffin removal and prevention agent adding pipe column and method ) 是由 苏祖波 甘庆明 刘汉斌 黄伟 吕亿明 王百 朱洪征 崔文昊 常莉静 于 2019-10-18 设计创作，主要内容包括：本发明属于油田采油技术领域,具体涉及一种油井清防蜡剂投加管柱及方法。本发明通过油管、套管、加药短节、抽油杆、抽油泵、筛管、承接装置和母堵的有机设置,将一种油井清防蜡剂投加管柱与待清防蜡的油井连接后,根据油井有无套管气,控制第一闸阀和第二闸阀的开启和关闭,将固体清防蜡剂加入,固体清防蜡剂受重力作用自动进入到承接装置处静止,固体清防蜡剂缓慢释放从而起到控制加药浓度的目的,且有效避免了防蜡剂的浪费。(The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to an oil well paraffin removal and prevention agent adding pipe column and a method. According to the invention, through organic arrangement of the oil pipe, the sleeve, the dosing short section, the sucker rod, the oil well pump, the sieve pipe, the receiving device and the female plug, after the wax removing and preventing agent feeding pipe column of the oil well is connected with the oil well to be cleaned and prevented from being waxed, the opening and closing of the first gate valve and the second gate valve are controlled according to the existence of sleeve gas in the oil well, the solid wax removing and preventing agent is added, the solid wax removing and preventing agent automatically enters the receiving device to be static under the action of gravity, the solid wax removing and preventing agent is slowly released so as to achieve the purpose of controlling the dosing concentration, and the waste of the wax preventing agent is effectively avoided.)

1. The utility model provides a clear paraffin control agent of oil well throws throwing tubular column, includes oil pipe (7) and sleeve pipe (8) at least, its characterized in that: the device also comprises a dosing short joint (1), a sucker rod (2), an oil well pump (3), a sieve tube (4), a receiving device (5) and a female plug (6); the dosing short section (1) is connected with the outer side wall of the casing (8) outside a wellhead, and a gate valve is arranged on the dosing short section (1); the sucker rod (2) is connected in the oil pipe (7); the oil well pump (3) is connected to the lower end of the sucker rod (2); the sieve tube (4) and the female plug (6) are sequentially connected with the inner side wall of the oil pipe (7) from top to bottom, and the sieve tube (4) is positioned below the oil well pump (3); the bearing device (5) is connected to the outer side wall of the oil pipe (7) between the sieve pipe (4) and the female plug (6).

2. The oil well paraffin removal and prevention agent dosing string as defined in claim 1, wherein: the dosing short section (1) is obliquely connected with the sleeve (8).

3. The oil well paraffin removal and prevention agent dosing string as defined in claim 1, wherein: an included angle of 40-50 degrees is formed between the dosing short section (1) and the upward direction of the axial line of the wellhead casing (8).

4. The oil well paraffin removal and prevention agent dosing string as defined in claim 3, wherein: the angle between the direction in which the axis of the dosing short section (1) and the wellhead casing (8) is upward is 45 degrees, and the length is 80 cm.

5. The oil well paraffin removal and prevention agent dosing string according to any one of claims 1 to 4, wherein: the dosing short section (1) is formed by connecting two cylinders with different diameters up and down, each cylinder is provided with a gate valve, the cylinder with the small diameter is provided with a first gate valve (9), and the cylinder with the large diameter is provided with a second gate valve (10); one end of the cylinder with the small diameter is connected with a wellhead casing (8).

6. The oil well paraffin removal and prevention agent dosing string as defined in claim 5, wherein: the two cylinders of different diameters have the dimensions: the cylinder length of 25mm diameter is 50cm and the cylinder length of 62mm diameter is 30 cm.

7. The oil well paraffin removal and prevention agent dosing string as defined in claim 1, wherein: the bearing device (5) comprises an outer cylinder (11) and an inner cylinder (12); the length of the outer cylinder (11) is greater than that of the inner cylinder (12); the inner cylinder (12) is sleeved on the outer side wall of the oil pipe (7); the outer cylinder (11) is sleeved outside the inner cylinder (12) and is connected with the inner side wall of the oil pipe (7); the upper part of the outer barrel (11) is open, and the lower bottom surface of the outer barrel is provided with a plurality of through holes.

8. The oil well paraffin removal and prevention agent dosing string as defined in claim 7, wherein: the inner cylinder and the outer cylinder are of an integrated structure; the inner cylinder is 50cm long and 73mm in diameter, and the outer cylinder is 30cm long and 115mm in diameter.

9. The oil well paraffin removal and prevention agent dosing string as defined in claim 7, wherein: the number of the through holes formed in the lower bottom surface of the outer barrel is 11, and the diameter of each through hole is 10 mm.

10. An oil well paraffin removal and prevention agent adding method is characterized in that: comprises the following steps

The method comprises the following steps: device connection

Connecting an oil well wax removing and preventing agent feeding pipe column with an oil well to be wax removed and prevented;

step two: adding solid paraffin removal and prevention agent

When the oil well has no casing gas, opening the two gate valves simultaneously and adding the solid paraffin removal and prevention agent; when the oil well is provided with casing gas, the first gate valve (9) is closed, the solid paraffin removal and prevention agent is added after the second gate valve (10) is opened, then the second gate valve (10) is closed, the first gate valve (9) is opened, and the solid paraffin removal and prevention agent automatically enters the outer barrel (11) of the bearing device (5) under the action of gravity.

Technical Field

The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to an oil well paraffin removal and prevention agent adding pipe column and a method.

Background

At present, the wax removal and prevention of the oil well mainly adopts the modes of hot washing for oil extraction, mechanical heating, electromagnetic heating, electric heating, addition of a chemical wax removal and prevention agent and the like. The wax removal and prevention cost is high in modes of hot washing, electromagnetism, electric heating and the like; the oil pipe is abraded in a mechanical paraffin removal mode; the solid paraffin control device has short service cycle, needs to pull up and pull down the oil pipe rod for replacement and has high cost, and the addition of the chemical paraffin control agent is a more mature and commonly used chemical adding mode in the oil field. However, when the chemical paraffin removal and prevention agent is added, the labor intensity is high, the stored medicine is evaporated and lost in the flowing process, part of the medicine is wasted, and the medicine concentration is not easy to control.

Disclosure of Invention

The invention provides an oil well paraffin removal and prevention agent adding pipe column and a method, and aims to provide the oil well paraffin removal and prevention agent adding pipe column and the method, which can enable a paraffin prevention agent to be stably held and slowly dissolved, effectively control the adding concentration and avoid the waste of the paraffin prevention agent.

In order to achieve the purpose, the invention adopts the technical scheme that:

an oil well paraffin removal and prevention agent feeding pipe column at least comprises an oil pipe and a sleeve, and also comprises a dosing nipple, a sucker rod, an oil well pump, a sieve pipe, a receiving device and a female plug; the dosing short section is connected with the outer side wall of the casing outside the wellhead and is provided with a gate valve; the sucker rod is connected in the oil pipe; the oil well pump is connected with the lower end of the sucker rod; the sieve tube and the female plug are sequentially connected with the inner side wall of the oil pipe from top to bottom, and the sieve tube is positioned below the oil well pump; the bearing device is connected to the outer side wall of the oil pipe between the sieve pipe and the female plug.

The dosing short section is obliquely connected with the sleeve.

And an included angle of 40-50 degrees is formed between the dosing short section and the axial direction of the wellhead casing.

The angle between the dosing short section and the upward direction of the axial direction of the wellhead casing is 45 degrees and the length is 80 cm.

The dosing short section is formed by connecting two cylinders with different diameters up and down, each cylinder is provided with a gate valve, the cylinder with the small diameter is provided with a first gate valve, and the cylinder with the large diameter is provided with a second gate valve; one end of the cylinder with the small diameter is connected with the wellhead casing.

The two cylinders of different diameters have the dimensions: the cylinder length of 25mm diameter is 50cm and the cylinder length of 62mm diameter is 30 cm.

The bearing device comprises an outer cylinder and an inner cylinder; the length of the outer cylinder is greater than that of the inner cylinder; the inner cylinder is sleeved on the outer side wall of the oil pipe; the outer cylinder is sleeved outside the inner cylinder and is connected with the inner side wall of the oil pipe; the upper part of the outer barrel is open, and the lower bottom surface of the outer barrel is provided with a plurality of through holes.

The inner cylinder and the outer cylinder are of an integrated structure; the inner cylinder is 50cm long and 73mm in diameter, and the outer cylinder is 30cm long and 115mm in diameter.

The number of the through holes formed in the lower bottom surface of the outer barrel is 11, and the diameter of each through hole is 10 mm.

An oil well paraffin removal and prevention agent adding method comprises the following steps

The method comprises the following steps: device connection

Connecting an oil well wax removing and preventing agent feeding pipe column with an oil well to be wax removed and prevented;

step two: adding solid paraffin removal and prevention agent

When the oil well has no casing gas, opening the two gate valves simultaneously and adding the solid paraffin removal and prevention agent; when the oil well is provided with casing gas, the first gate valve is closed, the solid paraffin removal and prevention agent is added after the second gate valve is opened, then the second gate valve is closed, the first gate valve is opened, and the solid paraffin removal and prevention agent automatically enters the outer barrel of the bearing device under the action of gravity.

Has the advantages that:

(1) according to the invention, through the arrangement of the dosing short section, the solid paraffin removal and prevention agent can be added after the opening and closing of the first gate valve and the second gate valve are controlled according to the existence of casing gas in an oil well, so that the method is safe and convenient.

(2) According to the invention, through the arrangement of the bearing device, after the solid clear paraffin inhibitor is added, the solid clear paraffin inhibitor automatically enters the bearing device under the action of gravity to be static, and the solid clear paraffin inhibitor is slowly released so as to achieve the purpose of controlling the dosing concentration, and the waste of the paraffin inhibitor is effectively avoided.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a nipple for adding a solid paraffin removal and prevention agent to a wellhead;

FIG. 3 is a schematic structural view of a solid paraffin remover/inhibitor holding device according to the present invention;

FIG. 4 is a top view of the outer cylinder of the present invention.

In the figure: 1-adding a short section; 2, pumping rod; 3-oil well pump; 4-a sieve tube; 5-a holding device; 6-mother plugging; 7-an oil pipe; 8-a sleeve; 9-a first gate valve; 10-a second gate valve; 11-an outer barrel; 12-inner cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.