CN215213463U

CN215213463U - Emptying tank matched with nitrogen injection gas lift

Info

Publication number: CN215213463U
Application number: CN202120760979.8U
Authority: CN
Inventors: 代建伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-12-17
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to an emptying groove technical field, in particular to emptying groove that nitrogen gas was lifted is annotated in cooperation. The emptying groove matched with the nitrogen injection gas lift comprises a groove body, an emptying pipe, a baffle, a manhole, a drain pipe and at least one anti-hammer drainage pipe; the hammer-proof discharge pipe is communicated with the emptying pipe, and a gate is arranged on the emptying pipe; a manhole is arranged on the tank body; the baffle is opposite to the outlet of the anti-hammer drain pipe; the drain pipe is positioned on the side wall of the groove body, and the bottom of the drain pipe extends to the bottom of the groove body; the top end of the liquid discharge pipe is connected with a valve; the longitudinal section of the hammer-proof drainage pipe is trapezoidal and is arranged in a hollow mode, and a main hollow channel forms a main flow channel area; the two waist walls of the hammer-proof drainage pipe are respectively provided with a flow guide mechanism and a flow blocking mechanism. The utility model provides a cooperation is annotated blow-down groove of nitrogen gas lift has weakened and has been led to the back when nitrogen gas lift and to the anti-water hammer effect that blow-down pipeline and tubular column produced in the pit, has prolonged the safe life of blow-down pipeline and tubular column in the pit, and economic benefits is showing.

Description

Emptying tank matched with nitrogen injection gas lift

Technical Field

The utility model relates to an emptying groove technical field, an emptying groove that can weaken anti-water hammer effect that in particular to use when the nitrogen gas lift is annotated in the oil field.

Background

In a pressure pipeline, the pressure fluctuation of fluid in the pipeline can be caused at the moment of starting and stopping a pump or opening and closing a gate, so that shock waves are formed, and the water hammer and counter-water hammer effects are caused. Both of which can cause damage to the pressure lines and the connected equipment, and should be minimized or avoided during production.

Before exploratory well production seeking, new well production putting or old well transferring, nitrogen gas injection is generally adopted to remove the blockage of drilling mud, dead oil and dead wax on a near wellbore area and an oil pipe. Because the nitrogen and the liquid in the well are incompatible, the flow of the gas lift flowback liquid in the pipeline is discontinuous two-phase flow, and the phenomenon that the nitrogen and the liquid in the well are alternately sprayed out when the well head is emptied occurs. When the lifting pipe is opened, continuous gas phase flow is formed in the emptying pipeline, the pressure is reduced sharply, a very serious counter water hammer effect can be generated in the emptying pipeline and the underground pipe column, the emptying pipeline and the underground pipe column can be greatly damaged, and the safe service life of the pipe column is influenced.

Disclosure of Invention

Technical problem to be solved

The utility model provides a blow-down groove that nitrogen gas was lifted is annotated in cooperation to do not add the blow-down groove of preventing hammer facility specially among the overcoming prior art, lead to lifting in the twinkling of an eye that leads to, continuous gaseous phase flow appears in the blow-down pipeline, and pressure sharply reduces, appears very serious anti-water hammer effect, brings defects such as great influence to the life and the operation safety of blow-down pipeline and tubular column in the pit.

(II) technical scheme

In order to solve the problems, the utility model provides a venting groove matched with a nitrogen gas injection gas lift, which comprises a groove body, a venting pipe, a baffle, a manhole, a drain pipe and at least one anti-hammer drainage pipe;

the at least one hammer-proof drainage pipe is communicated with a vent pipe, and a gate is arranged on the vent pipe;

a manhole is arranged on the tank body; the baffle plate is arranged opposite to the outlet of the anti-hammer drain pipe;

the liquid discharge pipe is positioned on the side wall of the groove body, and the bottom of the liquid discharge pipe extends to the bottom of the groove body; the top end of the liquid discharge pipe is connected with a valve;

the longitudinal section of the hammer-proof drainage pipe is trapezoidal and is arranged in a hollow mode, and a main hollow channel forms a main flow channel area;

and the two waist walls of the hammer-proof drainage pipe are respectively provided with a flow guide mechanism and a flow blocking mechanism, and the flow guide mechanism and the flow blocking mechanism form a resistance passage area.

Preferably, the flow guide mechanism is a flow guide plate, and the arrangement direction of the flow guide plate is parallel to the waist wall direction of the hammer-proof drainage pipe.

Preferably, the flow blocking mechanism is a flow blocking plate, the flow blocking plate is arranged opposite to the flow guide direction of the flow guide plate, and an included angle beta between the flow blocking plate and the horizontal line is 45-75 degrees.

Preferably, the longitudinal section of the anti-hammer blow-off pipe is trapezoidal, and the diameter of the inlet section of the anti-hammer blow-off pipe is smaller than that of the outlet section of the anti-hammer blow-off pipe.

Preferably, the included angle between the waist wall of the hammer-proof drainage pipe and the horizontal line is alpha, and the value range of alpha is 0-30 degrees.

(III) advantageous effects

The utility model provides a blow-down groove that nitrogen gas was lifted is annotated in cooperation has weakened and has lifted the anti-water hammer effect that leads to the back and produce to blow-down pipeline and tubular column in the pit when nitrogen gas, has prolonged the safe life of blow-down pipeline and tubular column in the pit, and economic benefits is showing.

Drawings

FIG. 1 is a front view of a venting tank structure of an embodiment of the present invention, which is used in conjunction with a nitrogen gas injection gas lift;

FIG. 2 is a top view of a venting tank structure of an embodiment of the present invention, which is used in conjunction with a nitrogen gas injection gas lift;

fig. 3 is the schematic view of the structure of the anti-hammer and anti-leakage pipe in the emptying groove of the nitrogen gas lift injection system.

Wherein: 1: a trough body; 2: an emptying pipe; 3: a hammer-proof drain pipe; 4: a baffle plate; 5: a manhole; 6: a liquid discharge pipe; 7: a baffle; 8: keep off the flow board.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1-3, an embodiment of the present invention provides a vent tank matched with a nitrogen gas injection gas lift, which includes a tank body 1, a vent pipe 2, a baffle 4, a manhole 5, a drain pipe 6 and at least one anti-hammer vent pipe 3;

at least one hammer-proof discharge pipe 3 is communicated with a vent pipe 2, and a gate is arranged on the vent pipe 2;

in this embodiment, the number of the hammer-proof drain pipes 3 is one, and in practical application, the number of the hammer-proof drain pipes 3 may be determined according to a processing design condition.

A manhole 5 is arranged on the tank body 1; the baffle 4 is arranged opposite to the outlet of the anti-hammer drain pipe 3;

the liquid discharge pipe 6 is positioned on the side wall of the tank body 1, and the bottom of the liquid discharge pipe 6 extends to the bottom of the tank body 1; the top end of the liquid discharge pipe 6 is connected with a valve;

the longitudinal section of the hammer-proof drain pipe 3 is trapezoidal and is arranged in a hollow mode, and a main hollow channel forms a main flow channel area;

and the two waist walls of the hammer-proof drainage pipe are respectively provided with a flow guide mechanism and a flow blocking mechanism, and the flow guide mechanism and the flow blocking mechanism form a resistance passage area. The guide mechanism is used for guiding the nitrogen outside the main flow channel area to the flow blocking device; the flow blocking mechanism has the function of folding the nitrogen guided back to the main flow channel area to block the nitrogen in the main flow channel area from advancing, so that the pressure of the main flow channel area is increased, and the counter water hammer effect of the whole emptying system is weakened.

In this embodiment, the flow guiding mechanism may be a flow guiding plate 7, and the flow blocking mechanism may be a flow blocking plate 8. Of course, the diversion mechanism can adopt diversion mechanisms with other structures besides the diversion plate with the plate-shaped structure, as long as the diversion mechanism can play a role in diversion. In a similar way, the flow blocking mechanism can adopt flow blocking plates with plate structures and flow blocking mechanisms with other structures, so long as the flow blocking mechanism can play a role in blocking flow.

Wherein, in order to better play the role of diversion, the arrangement direction of the diversion plate 7 is parallel to the waist wall direction of the hammer-proof discharge pipe 3. Preferably, the included angle between the waist wall of the hammer-proof drainage pipe and the horizontal line is alpha, and the value range of alpha is 0-30 degrees.

In order to better fold the guided nitrogen back to the main flow channel area and block the nitrogen in the main flow channel area from advancing, the flow baffle is arranged opposite to the flow guide direction of the flow baffle, and the included angle beta between the flow baffle and the horizontal line is 45-75 degrees.

The longitudinal section of the anti-hammer discharge pipe is trapezoidal, and the diameter of the inlet section of the anti-hammer discharge pipe is smaller than that of the outlet section of the anti-hammer discharge pipe.

The interior of the hammer-proof drain pipe 3 is divided into a main flow channel area A and a resistance channel area B according to the function when fluid passes through.

The main flow channel area A is internally provided with no structure, has an involute bell mouth shape, and has a trapezoidal section, wherein the diameter of the inlet end of the anti-hammer discharge pipe is the minimum, and the total flow area of the inlet end needs to be larger than the flow area of the emptying pipeline. When emptying, if the return discharge is only liquid mixture, the return discharge can safely enter the emptying groove only through the main channel without generating a counter water hammer effect.

The resistance channel area B is arranged outside the main flow channel area, and the guide plate and the baffle plate on the pipe wall of the resistance channel area form an auxiliary channel of fluid. When emptying, if the return discharge is a mixture of liquid and nitrogen, the liquid enters the emptying groove body 1 through the main flow channel area; and the nitrogen gas is remarkably increased in volume due to the reduction of the pressure in the drain pipe, and the redundant nitrogen gas enters the resistance channel area B to advance except for advancing along the main flow channel area A. The nitrogen returns to the main flow channel area A after the nitrogen runs in a zigzag mode in the resistance channel area, but a certain angle difference is formed between the nitrogen and the nitrogen in the main flow channel area A in the running direction, the nitrogen is caused to form a vortex, and the pressure in the main flow channel area is increased. Therefore, the pressure drop speed in the drain pipe is delayed, and the counter water hammer effect of the emptying pipeline and the underground pipe column is weakened.

Liquid and nitrogen gas after passing through the discharge pipe are sprayed on the baffle 4, the advancing direction is changed, the liquid falls to the bottom of the emptying groove body, and the nitrogen gas is discharged into the atmosphere through the manhole. After the air lift is emptied, the liquid in the emptying groove is discharged into the tank car through the liquid discharge pipe 6 to be transported away for treatment.

The following describes the installation process of the emptying tank matched with the nitrogen gas filling gas lift in detail:

step S1, the vent groove in this embodiment is placed at the well site and connected to the wellhead vent line. The tightness of the emptying groove needs to be checked in advance, and the pressure bearing and tightness of the emptying pipeline are checked on site to meet the construction requirements.

And step S2, opening the emptying pipeline gate, half opening the manhole baffle, closing the drain pipe gate, and waiting for gas lift operation.

In the operation process, when the nitrogen gas is injected to lift the emptying operation, the connected emptying pipeline gate is completely opened, the manhole is half opened, and the drain pipe gate is closed. Liquid and nitrogen in the well returned from the well mouth enter the anti-hammer discharge pipe of the discharge groove through the discharge pipeline.

And step S3, ending the gas lift, closing the emptying pipe gate, connecting the pump truck and the tank truck, pumping away the liquid in the emptying groove, then closing the drain pipe gate, and closing the manhole baffle.

And step S4, the emptying groove is transported back for standby.

The utility model provides a cooperate blow-down groove of annotating nitrogen gas lift through the design of preventing hammer blow-down pipe, has weakened the anti-water hammer effect that produces to blow-down pipeline and tubular column in the pit after nitrogen gas lift leads to, has prolonged the safe life of blow-down pipeline and tubular column in the pit, and economic benefits is showing.

The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.

Claims

1. The utility model provides a cooperation is annotated emptying groove of nitrogen gas lift which characterized in that includes: the device comprises a tank body (1), an emptying pipe (2), a baffle (4), a manhole (5), a liquid discharge pipe (6) and at least one hammer-proof drainage pipe (3);

at least one hammer-proof discharge pipe (3) is communicated with the emptying pipe (2), and a gate is arranged on the emptying pipe (2);

a manhole (5) is arranged on the tank body (1); the baffle (4) is arranged opposite to the outlet of the anti-hammer drain pipe (3);

the liquid discharge pipe (6) is positioned on the side wall of the groove body, and the bottom of the liquid discharge pipe (6) extends to the bottom of the groove body; a valve is arranged at the top end of the liquid discharge pipe (6);

the longitudinal section of the hammer-proof drain pipe (3) is trapezoidal and is arranged in a hollow mode, and a main hollow channel forms a main flow channel area;

and the two waist walls of the hammer-proof drainage pipe (3) are respectively provided with a flow guide mechanism and a flow blocking mechanism, and the flow guide mechanism and the flow blocking mechanism form a resistance channel area.

2. The emptying tank matched with the nitrogen injection gas lift is characterized in that the flow guide mechanism is a flow guide plate (7), and the flow guide plate (7) is arranged in a direction parallel to the waist wall direction of the anti-hammer discharge pipe.

3. The evacuation tank with nitrogen gas lift injection according to claim 2,

the flow blocking mechanism is a flow blocking plate (8), the flow blocking plate (8) is arranged opposite to the flow guide direction of the flow guide plate, and an included angle beta between the flow blocking plate (8) and the horizontal line is 45-75 degrees.

4. The evacuation tank in combination with a nitrogen-filled gas lift according to claim 1,

the longitudinal section of the hammer-proof bleeder tube (3) is trapezoidal, and the diameter of the inlet section is smaller than that of the outlet section.

5. The evacuation tank in combination with a nitrogen-filled gas lift according to claim 4,

the included angle between the waist wall of the hammer-proof drainage pipe (3) and the horizontal line is alpha, and the value range of alpha is 0-30 degrees.