CN216043654U

CN216043654U - Liquid drainage and gas production integrated pipe column

Info

Publication number: CN216043654U
Application number: CN202220328804.4U
Authority: CN
Inventors: 刘庆敏; 刘卫东; 刘家意; 刘兴文; 姚小剑; 陈敬涛; 张辉; 吴才丽; 蔡永
Original assignee: Dongying Haitian Petroleum Technology Co ltd
Current assignee: Dongying Haitian Petroleum Technology Co ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-03-15
Anticipated expiration: 2032-02-18

Abstract

The utility model relates to the technical field of oil field gas well production, in particular to a liquid drainage and gas production integrated tubular column which comprises a solid polished rod and an oil pipe, wherein the solid polished rod is positioned inside the oil pipe, the bottom end of the solid polished rod is fixedly connected with a punching hollow rod, the outer wall of the punching hollow rod is provided with a sand prevention cylinder, the punching hollow rod is communicated with the hollow rod in a sealing manner, the bottom end of the hollow rod is provided with an oil well pump plunger, the bottom end of the oil pipe is communicated with an oil well pump cylinder in a sealing manner, and the bottom of the oil well pump plunger is provided with an oil outlet valve. The liquid drainage and gas production integrated pipe adopts the solid polished rod, can be suitable for a conventional wellhead to use, and is convenient to construct; according to the utility model, the oil pipe is used as the final gas production pipe column, so that the up-and-down pressure of the oil well pump plunger is balanced, the phenomenon that the high pressure at the bottom of the well causes the rod column to go up is avoided, and the potential safety hazard is avoided; the liquid drainage and gas production integrated pipe is low in operation cost, low in equipment investment, simple in combination, mature in technology, safe and reliable.

Description

Liquid drainage and gas production integrated pipe column

Technical Field

The utility model relates to the technical field of oil field gas well production, in particular to a liquid drainage and gas production integrated tubular column.

Background

In the gas production process, the stratum produced fluid can be continuously produced along with production, and the conventional gas production pipe column can not effectively bring the stratum produced fluid out of a well mouth, so that the stratum produced fluid is accumulated, pressure is generated on the stratum, the yield of gas is slightly influenced, and the gas well is stopped to produce seriously. At present, the technical measures adopted on site are short in gas production period or too high in cost, and the common method is as follows: 1. in the conventional gas production tubular column, a foaming rod is put in for liquid drainage when flooding, so that the liquid drainage effect is poor, the gas production period is short, and the flooding phenomenon is frequent; 2. in the conventional gas production tubular column, nitrogen is used for discharging liquid during flooding, the liquid discharging effect is good, the gas production period is long, the flooding phenomenon is slightly reduced, but the cost is high; 3. the oil pumping machine is arranged at the well mouth, so that the produced liquid of the stratum is periodically pumped and discharged, the energy consumption is high, and the gas production cost is increased. Almost all drainage and gas production solutions on site require either surface equipment or energy replenishment.

The patent number CN202010165072.7 discloses a liquid drainage and gas production integrated tubular column, which mainly solves the problems of high production cost, high equipment cost, long recovery production period after flooding and the like. The liquid-discharging gas-producing integrated tubular column mainly comprises a plunger, a pump barrel, a packer and the like. After the construction of doing, at first lift and descend hollow rod, the gas-liquid mixture of stratum output all gets into the inlet valve under the separation of packer, along with the reduction of output liquid proportion and the increase of gas proportion, the equivalent density of gas-liquid mixture also reduces gradually in the hollow rod, when hollow rod bottom pressure is less than bottom hole pressure, stratum pressure can promote the gas-liquid mixture of hollow rod and rise to ground by the stratum, the output liquid in bottom hole can rely on the gas lift principle to be pushed to ground by the output air supply source is continuous, get into the gas transmission flow through the hose, descend hollow rod to pump barrel bottom, can put into normal production.

The liquid drainage and gas production integrated tubular column has the advantages that: simple combination, convenient construction and low cost. However, the hollow polished rod is used as the last gas production string in the field use process and is in an unfixed state, and under the condition of high bottom hole pressure, the safety hazard that the rod string goes upwards exists; meanwhile, the upper end of the hollow polished rod is provided with a valve, so that the outer leakage part of the hollow polished rod is easy to bend in the process of a connection flow, a wellhead packing box is punctured, and potential safety hazards exist.

In view of this, a liquid-discharging and gas-producing integrated tubular column is provided.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of flooding of a gas well, prolong the production period of the gas well and facilitate the installation of a wellhead, the utility model provides the following technical scheme:

the utility model provides a flowing back gas production integration tubular column, includes solid polished rod, oil pipe, solid polished rod is located inside the oil pipe, solid polished rod bottom fixedly connected with hollow rod that punches, the hollow rod outer wall that punches is provided with sand prevention section of thick bamboo, the sealed intercommunication of hollow rod that punches has hollow pole, hollow pole bottom is provided with the oil-well pump plunger, the sealed intercommunication of oil pipe bottom has the oil-well pump barrel, and oil-well pump plunger bottom is provided with the delivery valve, the sealed intercommunication in oil-well pump plunger bottom has sealed intubate, the inside sealed section of thick bamboo that uses with sealed intubate cooperation that is provided with of oil-well pump barrel bottom, the sealed intercommunication of oil-well pump barrel has the tail pipe, the tail pipe top is provided with the inlet valve.

The outer wall of the punching hollow rod above the sand prevention cylinder is uniformly provided with a plurality of liquid outlet holes.

The sand prevention cylinder is connected to the inner wall of the oil pipe in a sliding mode.

And a dynamic seal is formed between the oil well pump plunger and the inner wall of the oil well pump barrel.

And a sealing ring is arranged on the inner wall of the sealing cylinder.

The utility model has the beneficial effects that:

1. the liquid drainage and gas production integrated pipe adopts the solid polished rod, can be suitable for a conventional wellhead to use, and is convenient to construct;

2. according to the liquid drainage and gas production integrated pipe, the oil pipe is used as a final gas production pipe column, so that the up-and-down pressure of the plunger of an oil well pump is balanced, the phenomenon that a rod column moves upwards due to the high pressure at the bottom of a well is avoided, and potential safety hazards are avoided;

3. the liquid drainage and gas production integrated pipe is low in operation cost, low in equipment investment, simple in combination, mature in technology, safe and reliable.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a liquid-discharging and gas-producing integrated tubular column of the present invention;

in the figure: 1. a solid polished rod; 2. an oil pipe; 3. a tail pipe; 4. punching a hollow rod; 5. a sand control cylinder; 6. a hollow shaft; 7. a plunger of the oil well pump; 8. a pump cylinder of the oil well pump; 9. an oil outlet valve; 10. sealing the cannula; 11. a sealing cylinder; 12. an oil inlet valve.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b): as shown in fig. 1, a flowing back gas production integration tubular column, including solid polished rod 1, oil pipe 2, solid polished rod 1 is located inside oil pipe 2, oil pipe 2 outside is provided with the sleeve pipe, 1 bottom fixedly connected with of solid polished rod punches hollow rod 4, the hollow rod 4 outer wall that punches is provided with sand prevention section of thick bamboo 5, the sealed intercommunication of hollow rod 4 that punches has hollow rod 6, the 6 bottom of hollow rod is provided with oil-well pump plunger 7, the sealed intercommunication of 2 bottom of oil pipe has oil-well pump barrel 8, and oil-well pump plunger 7 bottom is provided with delivery valve 9, the sealed intercommunication of oil-well pump plunger 7 bottom has sealed intubate 10, the inside sealed section of thick bamboo 11 that is used with sealed intubate 10 cooperation that is provided with in oil-well pump barrel 8 bottom, the sealed intercommunication of oil-well pump barrel 8 has

tail pipe

3, 3 tops of tail pipe are provided with oil inlet valve 12.

In the utility model, a plurality of liquid outlet holes are uniformly formed in the outer wall of the perforated hollow rod 4 positioned above the sand prevention cylinder 5, and the gas-liquid mixture in the hollow rod 6 can be conveyed into the oil pipe 2 through the liquid outlet holes in the outer wall of the perforated hollow rod 4, so that the oil pipe 2 can be used as a final gas production pipe column.

Prevent 5 sliding connection of sand control section of thick bamboo in 2 inner walls of oil pipe, adopt this kind of design, a sand control section of thick bamboo 5 can remove along oil pipe 2 along with the hollow rod 4 that punches for sand gravel filters in the gas-liquid mixture that the hollow rod 4 that punches goes out the liquid hole and flows in a sand control section of thick bamboo 5, and the gravel can not deposit between 6 bottom outer walls of hollow rod and oil pipe 2, thereby makes gravel can not influence hollow rod 6 along 2 reciprocating motion of oil pipe in the gas-liquid mixture.

A dynamic seal is formed between the plunger 7 of the oil well pump and the inner wall of the pump cylinder 8 of the oil well pump, and the plunger 7 of the oil well pump can reciprocate along the pump cylinder 8 of the oil well pump.

The inner wall of the sealing barrel 11 is provided with a sealing ring, and the butt joint sealing performance of the sealing insertion tube 10 and the sealing barrel 11 can be improved through the sealing ring.

The working principle is as follows: when the liquid and gas discharging and collecting integrated pipe assembly is used, whether the liquid and gas discharging and collecting integrated pipe assembly can be normally used or not is checked firstly, the solid polished rod 1 is lifted by the operation machine firstly, when the solid polished rod 1 is lifted, the oil inlet valve 12 is opened, the oil outlet valve 9 is closed, the internal air pressure of the oil pump cylinder 8 is reduced, when the internal air pressure of the oil pump cylinder 8 is smaller than the bottom hole pressure, the stratum pressure can extrude the gas-liquid mixture at the bottom hole into the oil pump cylinder 8, the solid polished rod 1 is lowered by the operation machine, the oil inlet valve 12 is closed, the internal air pressure of the oil pump cylinder 8 is increased, when the internal air pressure of the oil pump cylinder 8 is larger than the bottom pressure of the punching hollow rod 4, the gas-liquid mixture inside the oil pump cylinder 8 automatically pushes the oil outlet valve 9 open, the gas-liquid mixture enters the punching hollow rod 4 through the punching hollow rod 6, and then the gas-liquid mixture enters the oil pipe 2 through the punching hollow rod 4 and is discharged to the ground.

The liquid is constantly discharged in the stratum, can lead to in the hollow pole 6 in the gas-liquid mixture the liquid proportion of output constantly reduce and the gas proportion constantly increases, and the gas-liquid mixture density constantly reduces in the hollow pole 6 to make the pressure in the hollow pole 6 bottom reduce. When the pressure at the bottom of the hollow rod 6 is smaller than the pressure of the stratum, the gas-liquid mixture in the hollow rod 6 is pushed to the ground from the stratum under the action of the pressure of the stratum, and the produced liquid at the bottom of the well is continuously pushed to the ground by the produced gas source. Then, the hollow rod 6 is lowered to the bottom of the pump cylinder 8 of the oil well pump, and the sealing insertion tube 10 and the sealing cylinder 11 are in sealing butt joint to be normally produced.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention is described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features can be replaced with equivalent ones. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The liquid drainage and gas production integrated pipe column comprises a solid polished rod (1) and an oil pipe (2), and is characterized in that the solid polished rod (1) is located inside the oil pipe (2), a punching hollow rod (4) is fixedly connected to the bottom end of the solid polished rod (1), a sand prevention cylinder (5) is arranged on the outer wall of the punching hollow rod (4), the punching hollow rod (4) is hermetically communicated with a hollow rod (6), an oil well pump plunger (7) is arranged at the bottom end of the hollow rod (6), an oil well pump cylinder (8) is hermetically communicated with the bottom end of the oil pipe (2), an oil outlet valve (9) is arranged at the bottom of the oil well pump plunger (7), a sealing insertion pipe (10) is hermetically communicated with the bottom of the oil well pump plunger (7), and a sealing cylinder (11) matched with the oil well pump insertion pipe (10) is arranged inside the bottom of the oil well pump cylinder (8), the oil well pump is characterized in that the pump cylinder (8) of the oil well pump is hermetically communicated with a tail pipe (3), and the top end of the tail pipe (3) is provided with an oil inlet valve (12).

2. The liquid drainage and gas production integrated tubular column as claimed in claim 1, characterized in that a plurality of liquid outlet holes are uniformly formed in the outer wall of the perforated hollow rod (4) above the sand prevention cylinder (5).

3. The integrated liquid and gas drainage pipe column according to claim 1, wherein the sand control cylinder (5) is slidably connected to the inner wall of the oil pipe (2).

4. The liquid drainage and gas production integrated pipe column as claimed in claim 1, wherein a dynamic seal is formed between the oil well pump plunger (7) and the inner wall of the oil well pump barrel (8).

5. The integrated liquid and gas drainage pipe column according to claim 1, wherein the inner wall of the sealing cylinder (11) is provided with a sealing ring.