阅读说明：本技术 一种高气油比油井井口加药装置及方法 (High gas-oil ratio oil well wellhead chemical adding device and method ) 是由 朱洪征 甘庆明 苏祖波 吕亿明 王百 崔文昊 常莉静 于 2020-05-18 设计创作，主要内容包括：本发明提供的一种高气油比油井井口加药装置及方法,包括活塞、立式工作筒、单向阀、加药罐和加药连接管；通过活塞的上行运动,将加药罐中的药液抽入立式工作筒中,然后通过活塞的下行将药液压入油井的油管和套管之间的环空中,再通过油泵将药液抽入油管的内部,进而通过药液阻止油管结垢；该加药装置通过活塞实现药液的抽取和压入,能够精确控制药液的加药量,避免造成药液浪费,或加药量不足的问题,同时通过一定压力将药液压入,解决了由于油井压力过大造成药液无法添加的问题,其次通过活塞的往复运动,保证加药的连续性。(The invention provides a high gas-oil ratio oil well wellhead chemical adding device and a method, comprising a piston, a vertical working cylinder, a one-way valve, a chemical adding tank and a chemical adding connecting pipe; the liquid medicine in the medicine adding tank is pumped into the vertical working barrel through the upward movement of the piston, then the liquid medicine is pressed into an annular space between an oil pipe and a sleeve of an oil well through the downward movement of the piston, and then the liquid medicine is pumped into the oil pipe through the oil pump, so that the scaling of the oil pipe is prevented through the liquid medicine; this charge device passes through the piston and realizes the extraction and the impressing of liquid medicine, and the medicine volume that adds that can the accurate control liquid medicine avoids causing the liquid medicine extravagant, or adds the problem that the medicine volume is not enough, impresses the liquid medicine through certain pressure simultaneously, has solved because the too big problem that causes the unable interpolation of liquid medicine of oil well pressure, secondly through the reciprocating motion of piston, guarantees the continuity of adding the medicine.)

1. A high gas-oil ratio oil well mouth dosing device is characterized by comprising a piston (3), a vertical working cylinder (4), a one-way valve (6), a dosing tank (7) and a dosing connecting pipe (8);

an outlet of the chemical feeding tank (7) is connected with the lower end of the vertical working barrel (4) through a one-way valve (6), the piston (3) is arranged in the vertical working barrel (4), one end of a chemical feeding connecting pipe (8) is arranged at the outlet end of the one-way valve (6) and is connected with the lower end of the vertical working barrel (4), and the other end of the chemical feeding connecting pipe (8) is communicated with an oil well;

when the piston moves upwards, the liquid medicine in the medicine adding tank (7) is pumped into the vertical working barrel (4) through the one-way valve (6), and when the piston moves upwards, the liquid medicine is pressed into an oil well through the medicine adding connecting pipe (8).

2. The chemical dosing device for the oil well mouth with the high gas-oil ratio as claimed in claim 1, wherein the piston (3) is connected with the transmission device (1) of the oil pumping unit through a piston push rod (2).

3. The chemical adding device for the oil well mouth with the high gas-oil ratio as claimed in claim 1, wherein the chemical adding tank (7) is arranged above the oil well mouth, the outlet of the chemical adding tank (7) is connected with the lower end of the vertical working barrel (4) through a chemical outlet pipe, and the chemical outlet pipe is arranged from the chemical adding tank to the well mouth in an inclined and downward mode.

4. The high gas-oil ratio oil well wellhead chemical adding device according to claim 3, characterized in that the chemical outlet pipe and the inlet section of the chemical adding connecting pipe (8) are arranged at an acute angle.

5. The chemical dosing device for the oil well mouth with the high gas-oil ratio as claimed in claim 1, wherein the lower end of the vertical working barrel (4), the outlet end of the one-way valve and the inlet of the chemical dosing connecting pipe (8) are connected through a three-way valve (5).

6. The chemical feeding device for the wellhead of the oil well with the high gas-oil ratio as claimed in claim 1, wherein the chemical feeding connecting pipe (8) is of a U-shaped structure.

7. The chemical dosing device for the wellhead of the oil well with the high gas-oil ratio as claimed in claim 1, characterized in that the outlet end of the chemical dosing connecting pipe (8) is further provided with a control valve (9).

8. The chemical feeding device for the wellhead of the oil well with the high gas-oil ratio is characterized in that an oil pumping device is further arranged in the oil well, and the oil pumping device is connected with a transmission device (1) of the oil pumping device.

9. A method for dosing a high gas-oil ratio wellhead dosing device according to any one of claims 1 to 8, comprising the steps of:

step 1, starting an oiling machine, driving a piston to move upwards by a transmission device (1) of an oil pumping unit, and pumping liquid medicine into a vertical working barrel (4) automatically;

step 2, the oil pumping unit drives the piston to move upwards, the liquid medicine in the vertical working barrel (4) is pressed into an annulus between the oil pipe and the sleeve, and the liquid medicine flows into the lower end of the oil well along the annulus and is mixed with the oil liquid;

step 3, the pumping unit ascends, and the oil pump pumps the mixed liquid of the liquid medicine and the oil into the oil pipe;

and 4, repeating the steps 1-3 until the dosing is finished.

10. The method for dosing a high gas-oil ratio wellhead dosing device according to claim 9, characterized in that the inner diameter D of the vertical mandrel (4) is determined as follows:

wherein Q is the oil well dosing amount; s is the stroke; n is the number of strokes.

Technical Field

The invention belongs to the technical field of wax removal, wax removal and scale prevention of oil fields, and particularly relates to a chemical feeding device and a chemical feeding method for a high gas-oil ratio oil well mouth.

Background

Daily dosing of the oil well is one of the most common maintenance measures for keeping the normal production of the oil well, so that pipe rod clamping caused by wax precipitation and scale formation of the oil well can be effectively prevented, the load of extraction equipment is reduced, the maintenance-free period of the oil well is prolonged, and the extraction cost is reduced. At present, the commonly used dosing modes are wellhead annulus dropping dosing and a vehicle-mounted dosing device, and the annulus dropping dosing mode is difficult to dose in the annulus for wells with high gas-oil ratio and high pressure; the vehicle-mounted dosing device has the problems of complex structure, multiple faults, difficulty in moving and maintaining, light weight and the like.

Based on the above problems, it is necessary to develop a high gas-oil ratio oil well wellhead chemical feeding device and method, so as to solve the problems in the prior art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a high gas-oil ratio oil well wellhead chemical adding device and method, which utilize the redundant energy of an oil pumping unit to realize automatic chemical adding.

The invention is realized by the following technical scheme:

a high gas-oil ratio oil well wellhead chemical adding device comprises a piston, a vertical working cylinder, a one-way valve, a chemical adding tank and a chemical adding connecting pipe;

the outlet of the chemical feeding tank is connected with the lower end of the vertical working barrel through a one-way valve, the piston is arranged in the vertical working barrel, one end of a chemical feeding connecting pipe is arranged at the outlet end of the one-way valve and is connected with the lower end of the vertical working barrel, and the other end of the chemical feeding connecting pipe is communicated with the oil well;

when the piston moves upwards, the liquid medicine in the medicine adding tank is pumped into the vertical working barrel through the one-way valve, and when the piston moves upwards, the liquid medicine is pressed into an oil well through the medicine adding connecting pipe.

Preferably, the piston is connected with the transmission device of the oil pumping unit through a piston push rod.

Preferably, the dosing tank is arranged above the opening of the oil well, the outlet of the dosing tank is connected with the lower end of the vertical working barrel through a dosing pipe, and the dosing pipe is arranged from the dosing tank to the wellhead in an inclined and downward manner.

Preferably, the medicine outlet pipe and the inlet section of the medicine feeding connecting pipe form an included angle, and the included angle is an acute angle.

Preferably, the lower end of the vertical working barrel, the outlet end of the one-way valve and the inlet of the dosing connecting pipe are connected through a three-way valve.

Preferably, the dosing connecting pipe is of a U-shaped structure.

Preferably, the outlet end of the dosing connecting pipe is also provided with a control valve.

Preferably, the oil well is also provided with an oil pumping device, and the oil pumping device is connected with a transmission device of the oil pumping unit.

A dosing method of a dosing device for a wellhead of an oil well with a high gas-oil ratio comprises the following steps:

step 1, starting an oiling machine, driving a piston to move upwards by a transmission device of an oil pumping unit, and automatically pumping liquid medicine into a vertical working barrel;

step 2, the oil pumping unit drives the piston to move upwards, the liquid medicine in the vertical working barrel is pressed into an annular space between the oil pipe and the sleeve, and the liquid medicine flows into the lower end of the oil well along the annular space and is mixed with the oil liquid;

step 3, the pumping unit ascends, and the oil pump pumps the mixed liquid of the liquid medicine and the oil into the oil pipe;

and 4, repeating the steps 1-3 until the dosing is finished.

Preferably, the method for determining the inner diameter D of the vertical mandrel comprises the following steps:

wherein Q is the oil well dosing amount; s is the stroke; n is the number of strokes.

Compared with the prior art, the invention has the following beneficial technical effects:

according to the high gas-oil ratio oil well mouth dosing device provided by the invention, the liquid medicine in the dosing tank is pumped into the vertical working barrel through the upward movement of the piston, then the liquid medicine is pressed into an annular space between an oil pipe and a sleeve of an oil well through the downward movement of the piston, and then the liquid medicine is pumped into the oil pipe through the oil pump, so that the scaling of the oil pipe is prevented through the liquid medicine; this charge device passes through the piston and realizes the extraction and the impressing of liquid medicine, and the medicine volume that adds that can the accurate control liquid medicine avoids causing the liquid medicine extravagant, or adds the problem that the medicine volume is not enough, impresses the liquid medicine through certain pressure simultaneously, has solved because the too big problem that causes the unable interpolation of liquid medicine of oil well pressure, secondly through the reciprocating motion of piston, guarantees the continuity of adding the medicine.

Furthermore, the oiling machine drives the piston to reciprocate, an additional power system is not needed, and the utilization rate of the power of the oil pumping machine is improved.

Furthermore, the medicine outlet pipe is obliquely arranged downwards, so that the pressure of the extracted liquid medicine is reduced, and the liquid medicine flows into the vertical working barrel under the coordination of gravity.

Furthermore, it is acute angle setting to go out between the medicine pipe and the entry section of adding the medicine connecting pipe, guarantees to be with the liquid medicine can the suction vertical working barrel in, in the pressurization injection adds the medicine connecting pipe, and then guarantees that the liquid medicine enters into the annular space under the pressure effect.

Furthermore, the capacity of the vertical working barrel is determined through calculation, so that the dosage of each stroke is accurately determined, and waste of liquid medicine is avoided.

Drawings

FIG. 1 is a schematic structural view of the drug adding device of the present invention.

In the figure: 1. the device comprises a pumping unit transmission device, 2, a piston push rod, 3, a piston, 4, a vertical working barrel, 5, a connecting tee joint, 6, a check valve, 7, a dosing tank, 8, a dosing connecting pipe, 9, a control valve, 10, a pumping rod, 11, an oil well pump, 12, a sieve pipe, 13, a plug, 14 and an oil pipe outlet joint.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1, the high gas-oil ratio oil well wellhead chemical dosing device comprises an oil pumping unit transmission device 1, a piston 3, a vertical working cylinder 4, a one-way valve 6, a chemical dosing tank 7, a chemical dosing connecting pipe 8 and a control valve 9.

The export of adding medicine jar 7 is connected with the lower extreme of vertical working barrel 4 through check valve 6, and piston 3 sets up in vertical working barrel 4, and piston 3 is connected with beam-pumping unit transmission 1 through piston push rod 2, and beam-pumping unit transmission 1 drives piston up-and-down reciprocating motion in vertical working barrel 4, the one end setting of adding medicine connecting pipe 8 is at the exit end of check valve 6 to be connected with the lower extreme of vertical working barrel 4, add the annular space intercommunication between the other end of medicine connecting pipe 8 and oil pipe and the sleeve.

When the piston moves upwards, the liquid medicine in the medicine adding tank 7 is pumped into the vertical working barrel 4 through the check valve 6, and when the piston moves upwards, the liquid medicine is pressed into an annular space between the oil pipe and the sleeve through the medicine adding connecting pipe 8.

Specifically, add the medicinal cupping 7 and set up in the top of pit shaft oral area, the export of adding medicinal cupping 7 is connected with the lower extreme of vertical working barrel 4 through going out the pencil, and check valve 6 is established on going out the pencil, and goes out the pencil and set up downwards to the well head slope from adding the medicinal cupping.

The lower end of the vertical working barrel 4, the outlet end of the medicine outlet pipe and the inlet of the medicine adding connecting pipe 8 are connected through a three-way valve 5.

The inner diameter D of the vertical working barrel 4 is set according to the oil well dosage, and the formula is as follows:

in the formula: q is the oil well dosing amount; s is the stroke; n is the number of strokes.

The medicine adding connecting pipe 8 is of a U-shaped structure, an inlet of the medicine adding connecting pipe is connected with the three-way valve 5, and the side wall of the shaft at the other end of the medicine adding connecting pipe is connected with the side wall of the shaft at the other end of the medicine adding connecting pipe.

Add medicine connecting pipe 8 including inlet pipe, passage and the discharging pipe that communicates in proper order, the entry and the three-way valve of inlet pipe are connected, and the inlet pipe is located the below of going out the pencil to it is the contained angle setting with the inlet pipe to go out the pencil, and this contained angle is the acute angle, vertical working barrel 4 and play contained angle more than or equal to 90 between the pencil.

The discharge pipe is positioned below the feed pipe, the outlet of the discharge pipe is communicated with the shaft, and the discharge pipe is also provided with a control valve 9.

The well bore is also provided with an oil pumping device which comprises an oil pumping rod 10, an oil well pump 11 and a sieve tube 12.

The upper end of the sucker rod 10 is connected with the pumping unit transmission device 1, the lower end of the sucker rod is connected with the oil well pump 11, the sieve tube 12 is connected with the pump barrel of the oil well pump 11, the lower end of the pump barrel is provided with a plug 13, well fluid in the pump barrel of the oil well pump 11 enters the oil pipe to be pumped to the ground, and then enters the gathering and transportation process through an oil pipe outlet joint 14.

The invention provides a dosing method of a high gas-oil ratio oil well wellhead dosing device, which comprises the following steps:

1. the inner diameter of the vertical mandrel is determined.

2. The vertical working barrel is respectively connected with a dosing connecting pipe and a medicine outlet pipe through a three-way valve, the medicine outlet pipe is communicated with a medicine outlet tank, a one-way valve 6 is arranged on the medicine outlet pipe, an outlet of the dosing connecting pipe is communicated with a shaft, and a control valve is arranged at an outlet end of the dosing connecting pipe.

3. And a piston is arranged in the vertical working barrel and is connected with a transmission device of the oil pumping unit through a piston push rod.

4. The chemical feeding tank 7 is filled with the chemicals required by the oil well.

5. Opening the control valve 9 and the check valve 6, starting the oil pumping unit, and enabling the transmission device 1 of the oil pumping unit to reciprocate up and down;

during the upstroke: the piston push rod 2 drives the piston 3 in the vertical working barrel 4 to move upwards, the liquid medicine in the medicine adding tank 7 enters the vertical working barrel 4 through the check valve 6 under the action of the principle of the U-shaped pipe, the sucker rod 10 is driven to move upwards at the same time, the sucker rod 10 further drives the piston of the oil well pump 11 to move upwards, and the well liquid enters the pump barrel of the oil well pump 11 after passing through the sieve tube 12.

During the down stroke: the piston push rod 2 drives the piston 3 in the vertical working cylinder 4 to move downwards, and the piston 3 enables liquid medicine in the vertical working cylinder 4 to enter an oil well shaft through the medicine adding connecting pipe 8; meanwhile, the sucker rod 10 is driven to move downwards, the sucker rod 10 further drives the piston of the oil well pump 11 to move downwards, and well fluid in a pump barrel of the oil well pump 11 enters an oil pipe to be pumped to the ground and enters a gathering and transportation process from an oil pipe outlet joint 14.

6. And closing the control valve 9 and the check valve 6, and finishing dosing.

According to the high gas-oil ratio oil well mouth dosing device provided by the invention, the liquid medicine in the dosing tank is pumped into the vertical working barrel through the upward movement of the piston, then the liquid medicine is pressed into an annular space between an oil pipe and a sleeve of an oil well through the downward movement of the piston, and then the liquid medicine is pumped into the oil pipe through the oil pump, so that the scaling of the oil pipe is prevented through the liquid medicine; this charge device passes through the piston and realizes the extraction and the impressing of liquid medicine, and the medicine volume that adds that can the accurate control liquid medicine avoids causing the liquid medicine extravagant, or adds the problem that the medicine volume is not enough, impresses the liquid medicine through certain pressure simultaneously, has solved because the too big problem that causes the unable interpolation of liquid medicine of oil well pressure, secondly through the reciprocating motion of piston, guarantees the continuity of adding the medicine.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.