CN213016307U - Intelligent downhole throttling valve capable of adjusting yield of gas well - Google Patents

Abstract

The utility model discloses an intelligent downhole throttle valve that gas well can be adjusted to produce, including delivering mechanism and screen pipe, both link to each other, and the cover has in proper order to be equipped with pressure acquisition mechanism, adjustable choke in the screen pipe, the lower extreme of adjustable choke connects gradually motor brake mechanism and circuit control part, pressure acquisition mechanism gathers the pressure of delivering mechanism and screen pipe center channel department, adjustable choke passes through motor brake mechanism control, circuit control part control motor brake mechanism. The pressure sensor in the utility model is communicated with the upper central channel, the collected pressure signal is the pressure after the gas flows out of the throttle valve, the central channel is communicated with the well mouth, and the throttling effect can not be generated any more, so the received pressure signal can not generate distortion; and the influence of underground pressure fluctuation is avoided, the power supply of a battery is saved, and the service life is prolonged.

Description

Intelligent downhole throttling valve capable of adjusting yield of gas well

Technical Field

The utility model relates to a control valve for the gas well especially relates to an intelligent choke valve in pit of adjustable product of gas well.

Background

The underground throttleer is an effective means for stabilizing production of gas wells, preventing hydrate production and reducing ground construction investment, and is widely applied to various atmospheric fields. The common downhole choke has the following problems 1 in application that the oil pressure of a well head is continuously reduced along with the formation pressure, when the pressure transmission requirement cannot be met, the size of the aperture of a throttling nozzle cannot be adjusted according to the change of the production requirement and a pressure instruction signal sent by the well head, and a pipe column needs to be pulled out or replaced by throwing and fishing operation. 2. When the situations of wellhead leakage, sudden pressure drop, failure of a wellhead block valve, sudden pressure increase and the like occur, the underground throttling process cannot realize emergency shutdown, and the safety production of a gas well is guaranteed.

Patent number ZL 201621389046.8, titled "intelligent downhole throttle valve that gas well can promptly be shut off", discloses an intelligent downhole throttle valve that gas well can promptly be shut off, including delivering mechanism, downhole throttle mechanism, its characterized in that: the underground throttling mechanism comprises a working barrel, the lower end of the working barrel is connected with a lower joint, a protection barrel is connected to the lower end of the working barrel, an inner core barrel is arranged in the protection barrel, an annular space is arranged between the protection barrel and the inner core barrel, a temperature pressure testing tool and a high-temperature motor are arranged in the inner core barrel, a controller of the temperature pressure testing tool is used for controlling the high-temperature motor, an output shaft of the high-temperature motor is connected with a rotor of a throttling nozzle, a regulating seat of the throttling nozzle is arranged in the lower joint, a sand filtering net is connected to the lower end of the lower joint, and a fluid channel in the sand filtering net corresponds to a regulating hole in a stator of the throttling nozzle. The utility model discloses a detect mouth back pressure, the controller control motor of temperature pressure testing tool drives the pivot rotation, adjusts the aperture of throttle mouth, makes with throttle mouth back pressure stabilization at the settlement scope to stabilize well head production pressure, further provided the efficiency of construction.

Although the design of this patent can adjust the opening of the throttle valve, the following disadvantages still exist:

(1) the pressure sensor of the pressure testing device of the throttling valve is communicated with the annular space, the collected pressure signal is the pressure of gas after the gas is throttled for multiple times in the throttling valve inner core, and in the multiple throttling process, the flow state disorder of the gas is not balanced yet, so that a pressure command signal sent by a wellhead is easily interfered, and the condition that the command signal is distorted and cannot be received is easily caused.

(2) In the underground working process, the throttling nozzle is automatically adjusted according to the pressure fluctuation at the bottom of the well, the main function is to stabilize the pressure from the underground to the wellhead, and the pressure signal sent by the wellhead is also used for adjusting the pressure setting behind the throttling nozzle. This design is susceptible to temporary downhole pressure fluctuations or pressure changes resulting from the bursty conditions of some shale gas wells, which may cause frequent or faulty choke operation.

(3) The pressure regulation of the throttle nozzle is based on the pressure after the throttle nozzle is regulated, so that the pressure is stabilized at a set value. However, the correlation between the pressure and the production of the wellhead is different under different production conditions, so that the purpose of adjusting the production is difficult to achieve.

(4) The pressure command signal of the throttler is in a pressure wave form, and under the production well condition of a gas well, the pressure wave command signal is easy to distort when being transmitted to the underground, so that the receiving efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the not enough intelligence choke valve that provides a gas well is adjustable to produce that exists to above-mentioned prior art, this choke valve can receive the pressure command signal that the well head sent and the pressure variation response that the production situation sudden change produced in the pit, according to command signal's content, carry out the accent of throttle mouth big, close little or the complete shut down, action such as open entirely to make shale gas well reach in the pit and transfer the product step-down, prevent effects such as hydrate production.

The utility model discloses the technical scheme who adopts does: the utility model provides an intelligent throttle valve in pit that gas well can be adjusted to produce which characterized in that: the adjustable throttling valve is characterized by comprising a delivery mechanism and a sieve tube, wherein the delivery mechanism and the sieve tube are connected, a pressure acquisition mechanism and an adjustable flow nozzle are sequentially sleeved in the sieve tube, the lower end of the adjustable flow nozzle is sequentially connected with a motor braking mechanism and a circuit control part, the pressure acquisition mechanism acquires the pressure at the central channel of the delivery mechanism and the sieve tube, the adjustable flow nozzle is controlled by the motor braking mechanism, and the circuit control part controls the motor braking mechanism.

According to the technical scheme, the adjustable flow nozzle comprises a flow controller joint, a fixed valve and a rotary valve are arranged in the flow controller joint, the rotary valve is sleeved in the fixed valve, the rotary valve is connected with a motor output shaft of a motor braking mechanism, a first radial through hole is formed in the wall of the rotary valve, a second radial through hole is formed in the fixed valve, the motor output shaft drives the rotary valve to rotate in the fixed valve, an inlet is formed in the flow controller joint and communicated with the inner cavity of the rotary valve, an outlet and a delivery mechanism are arranged and communicated with a central channel of a sieve tube, and the inlet is communicated with an annular space between an oil pipe and the sieve tube.

According to the technical scheme, the fixed valve and the rotary valve are both made of ceramic materials.

According to the technical scheme, the pressure acquisition mechanism comprises a pressure sensor connector, a pressure sensor is arranged in the pressure sensor connector, a connecting channel is arranged at the upper end of the pressure sensor connector, and the connecting channel is communicated with the pressure sensor and the central channel.

According to the technical scheme, the central channel is communicated with a wellhead.

The utility model discloses the beneficial effect who gains does: the pressure sensor of the pressure acquisition mechanism in the utility model is communicated with the upper central channel, the acquired pressure signal is the pressure after the gas flows out of the throttle valve, the central channel is communicated with the well mouth, and the throttling effect can not be generated, so that the received pressure signal can not generate distortion; the opening of the throttling nozzle of the throttling valve is adjusted only when a pressure instruction signal sent by a wellhead or extremely high and extremely low pressure values generated by well condition changes are received, the opening of the throttling nozzle is not influenced by underground pressure fluctuation, the power supply of a battery is saved, and the service life is prolonged; when the throttle valve receives a pressure instruction signal, the aperture of the throttle nozzle is directly adjusted to be large or small, so that the purpose of directly adjusting the production is achieved; the pressure command signal of the throttle valve is in a pressure step command form, so that the fault tolerance is strong, and the receiving effect is good.

Drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of an adjustable spout of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the embodiment provides an intelligent downhole throttle valve capable of adjusting production of a gas well, which comprises a delivery mechanism and a sieve tube 9, wherein the delivery mechanism and the sieve tube are connected, the delivery mechanism comprises a fishing head 1 and a delivery base barrel 2, a pressure acquisition mechanism and an adjustable choke are sequentially sleeved in the sieve tube 9, the lower end of the adjustable choke is sequentially connected with a motor braking mechanism 6, a circuit control part 7 and a battery 8, the pressure acquisition mechanism acquires pressure at a central channel 11 of the delivery mechanism and the sieve tube, the adjustable choke is controlled by the motor braking mechanism 6, and the circuit control part 7 controls the motor braking mechanism 6.

The pressure acquisition mechanism comprises a pressure sensor connector 3, a pressure sensor is arranged in the pressure sensor connector 3, a connecting channel 10 is arranged at the upper end of the pressure sensor connector, the connecting channel 10 is communicated with the pressure sensor and a central channel 11, and the central channel 11 is communicated with a wellhead.

As shown in fig. 2, the adjustable flow nozzle comprises a restrictor joint 404, a fixed valve 403 and a rotary valve 401 are arranged in the restrictor joint 404, the rotary valve 401 is sleeved in the fixed valve 403, the rotary valve 401 is connected with a motor output shaft 402 of a motor braking mechanism, a first radial through hole 406 is arranged on the wall of the rotary valve 401, a second radial through hole 407 is arranged on the fixed valve 403, the motor output shaft 402 is arranged in the restrictor joint 404 through a rotary bearing 5, the motor output shaft 402 drives the rotary valve 401 to rotate in the fixed valve 403, an inlet 405 is arranged on the restrictor joint 404 and communicated with an inner cavity of the rotary valve, an outlet is communicated with a delivery mechanism and a central channel 11 of a sieve tube, and the inlet is also communicated with an annular space between the oil tube and the sieve tube. The fixed valve and the rotary valve are both made of ceramic materials.

The working steps and the principle of the throttle valve are as follows:

(1) after the throttle valve is put into the underground X-shaped working barrel through a steel wire throwing and fishing, the wellhead is opened, and the underground pressure is slowly reduced to the production pressure. At the moment, the time delay (the time length set on the ground) of the well descending is passed, the throttle valve is opened to the well descending opening degree step by step and then opened to the working opening degree, and the shale gas well enters a stable production state.

(2) In the stable production process, because the production needs to be changed, when the aperture of the throttling nozzle needs to be adjusted, the ground sends a pressure step signal instruction, the motor rotates to drive the rotary valve to rotate, so that the first radial through hole 406 is communicated with the second radial through hole 407, and the throttling nozzle is adjusted to be opened or closed. And the aperture of the throttling nozzle cannot be changed due to pressure fluctuation generated by normal underground production.

(3) When the situations of wellhead leakage, sudden pressure drop, failure of a wellhead block valve, sudden pressure increase and the like occur, the underground throttling process cannot realize emergency shutdown, and the safety production of a gas well is guaranteed.

(4) When the throttle valve needs to be pulled out, the steel wire can be fished down, if a pulling-out tool is butted with the upper part of the fishing seat barrel 2, the pin is cut off, the throttle valve is pulled out, and then the production is recovered.

Claims (5)

1. The utility model provides an intelligent throttle valve in pit that gas well can be adjusted to produce which characterized in that: the adjustable throttling valve is characterized by comprising a delivery mechanism and a sieve tube, wherein the delivery mechanism and the sieve tube are connected, a pressure acquisition mechanism and an adjustable flow nozzle are sequentially sleeved in the sieve tube, the lower end of the adjustable flow nozzle is sequentially connected with a motor braking mechanism and a circuit control part, the pressure acquisition mechanism acquires the pressure at the central channel of the delivery mechanism and the sieve tube, the adjustable flow nozzle is controlled by the motor braking mechanism, and the circuit control part controls the motor braking mechanism.

2. The gas well adjustable-yield intelligent downhole choke valve of claim 1, wherein: the adjustable flow nozzle comprises a flow controller joint, a fixed valve and a rotary valve are arranged in the flow controller joint, the rotary valve is sleeved in the fixed valve, the rotary valve is connected with a motor output shaft of a motor braking mechanism, a first radial through hole is formed in the wall of the rotary valve, a second radial through hole is formed in the fixed valve, the motor output shaft drives the rotary valve to rotate in the fixed valve, an inlet is formed in the flow controller joint and communicated with the inner cavity of the rotary valve, an outlet and a delivery mechanism are arranged and communicated with a central channel of a sieve tube, and the inlet is communicated with an annular space between an oil tube and the sieve tube.

3. The gas well adjustable-yield intelligent downhole choke valve of claim 2, wherein: the fixed valve and the rotary valve are both made of ceramic materials.

4. The gas well adjustable-yield intelligent downhole choke valve of claim 2, wherein: the pressure acquisition mechanism comprises a pressure sensor connector, a pressure sensor is arranged in the pressure sensor connector, a connecting channel is arranged at the upper end of the pressure sensor connector, and the connecting channel is communicated with the pressure sensor and the central channel.

5. The gas well adjustable-yield intelligent downhole choke valve of claim 2, wherein: the central passage is in communication with the wellhead.

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