Rodless oil extraction digital intelligent wellhead

Abstract

The invention relates to a rodless oil extraction digital intelligent wellhead which comprises a wellhead oil extraction wellhead part, a production process manifold part, a wireless monitoring and metering part, an electric heater, a cable penetrating part, an underground pre-buried cable, a signal cable part and an underground pre-buried production pipeline part. The device further comprises a flowmeter, a pressure meter and a thermometer. The flow meter is arranged on one side of a production gate valve on one side of the wellhead oil extraction wellhead part; the pressure gauge and the thermometer are mounted on one side of the production gate valve on the other side of the wellhead oil production wellhead part; a constant-pressure deflation valve is mounted on one side of the sleeve gate valve, and a check valve and a DN50 gate valve are mounted on each of the single-quantity production pipe and the mixed production pipe; the device is energy-saving and environment-friendly, and indexes in the well are monitored and metered in real Digitization and intellectualization are realized; manual control and remote control are integrated; the defects of a common wellhead are completely overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas fields and shale oil production wellheads, and in particular relates to a digital intelligent wellhead for rodless oil production. Background Art

[0002] At present, most of the wellheads of machine-produced wells in oil and gas fields use conventional wellheads or special wellheads for electric pump wells. During the production process, it is impossible to accurately and real-time monitor and measure the produced fluid of a single well; it is impossible to monitor and measure the pressure and temperature in the well in real time. With the continuous improvement of oil production technology, there is an urgent need for a digital and intelligent wellhead that can monitor and measure the pressure changes and temperature fluctuations in the well, as well as measure and monitor the produced fluid of a single well and the mixed produced fluid of the platform. At the same time, it can meet the downhole liquid heating requirements through the connection with the wellhead through external equipment, and can discharge the oil casing environmental control pressure in real time. Summary of the invention

[0003] The present invention solves the technical problem by adopting the following technical solutions:

[0004] A rodless oil production digital intelligent wellhead, including a wellhead oil production wellhead part, a production process manifold part, a wireless monitoring and metering part, an electric heating part, a cable crossing part, an underground pre-buried cable, a signal cable part, and an underground pre-buried production pipeline part;

[0005] It also includes a flow meter, a pressure gauge, and a thermometer; the flow meter is installed on one side of the production gate valve on one side of the wellhead oil production wellhead part; the pressure gauge and the thermometer are installed on one side of the production gate valve on the other side of the wellhead oil production wellhead part;

[0006] A constant pressure air release valve is installed on one side of the casing gate valve, and a check valve and a DN50 gate valve are installed on the single-volume production pipe and the mixed production pipe.

[0007] Furthermore, an electric pump cable crossing sealer is installed on the special upper flange of the electric pump well, and the electric pump cable crossing sealer includes a crossing body, a cable sealing sleeve, an anti-rotation pressure cap, and a sealing pressure cap; the lower end of the crossing body is a 1.9UPTBG thread, and the upper end is a seamless pipe with a tapered mouth, the upper end of which is internally covered with a cable sealing sleeve, and the outer side of the upper end is inserted with an anti-rotation pressure cap, the inner end face of the inner cavity of the anti-rotation pressure cap is crimped with the cable sealing sleeve, the sealing pressure cap is threadedly connected to the crossing body, and the inner cavity shoulder end face is crimped with the anti-rotation pressure cap.

[0008] Furthermore, the production process manifold part includes a single-volume production process manifold and a mixed-volume production process manifold.

[0009] Furthermore, the single-volume production process manifold includes a single-volume pipe, a DN50 gate valve, a DN50 double-wire short-circuit, a check valve, and a flexible joint connected in sequence; the flexible joint is connected to one end of a flange reducing tee, and the other end of the flange reducing tee is connected in sequence to a positive well washing gate valve, a clamp, and a plug, and the third end of the flange reducing tee is connected in sequence to a flow meter, a flange short-circuit, and a gate valve 1; during the production process, the gate valve 1 is opened, and the produced fluid enters the single production pipeline through the gate valve 1, the flange short-circuit, the flow meter, the flange reducing tee, the flexible joint, the check valve, the DN50 double-wire short-circuit, the DN50 gate valve, and the inner cavity of the single-volume pipe, and then reaches the metering skid through the single production pipeline. The gate valve 1 will perform real-time detection and metering of the produced fluid, and at the same time, the metering skid will measure the produced fluid of each well separately. After metering, it enters the single production collection pipeline through the mixed outlet until it reaches the transfer station.

[0010] Furthermore, the mixed production process manifold includes a gate valve three, a composite short circuit, a flexible joint two, a check valve two, a DN50 gate valve two, and a mixed output pipe which are connected in sequence; a pressure gauge and a thermometer are installed on the composite short circuit through a pressure gauge base and a thermometer base respectively; during the production process, the gate valve one is closed and the gate valve three is opened, and the produced fluid enters the mixed production pipeline through the lifting short circuit, the large four-way, the oil pipe short circuit, the gate valve three, the composite short circuit, the flexible joint two, the check valve two, the DN50 gate valve two, and the mixed output pipe, and enters the transfer station through the stop valve, the pressure gauge monitors and measures the pressure in the pipe in real time, and the thermometer detects and measures the temperature in the pipe in real time.

[0011] Furthermore, the process manifolds for the single-volume production process and the process manifolds for the mixed production process are respectively installed with a check valve and a second check valve, to prevent the produced fluid from the high-pressure wells from flowing back into the low-pressure wells and forming reflux when multiple wells are exploited at the same time; at the same time, the process manifolds are respectively installed with a DN50 gate valve and a second DN50 gate valve, so that the production pipeline can be closed at any time if there is a safety hazard.

[0012] Furthermore, it also includes a casing pressure constant pressure air release valve assembly, including a pressure measuring tee; the two ends of the pressure measuring tee are respectively connected to the gate valve five and the casing pressure gauge; the third end of the pressure measuring tee is connected to the constant pressure air release valve, the conversion joint, and the casing gas short circuit in sequence; during the production process, the gate valve five is normally open, and the constant pressure air release valve sets parameters as needed. When the oil casing environmental control pressure is greater than the set pressure, the constant pressure air release valve opens the high-pressure liquid and gas in real time to discharge it to the casing gas pipeline, and enters the transfer station through the stop valve.

[0013] Furthermore, the flowmeter includes a mass flowmeter, a differential pressure flowmeter, an ultrasonic flowmeter, an electromagnetic flowmeter, a turbine flowmeter, and an ultrasonic flowmeter.

[0014] Furthermore, the pressure gauge includes a liquid column pressure gauge, an elastic pressure gauge, an electric contact pressure instrument, a capacitive pressure sensor, a strain gauge pressure sensor, etc.

[0015] Furthermore, the thermometer includes a rotary thermometer, a semiconductor thermometer, a thermocouple thermometer, an optical pyrometer, a liquid crystal thermometer, and a digital temperature sensor.

[0016] The advantages and positive effects of the present invention are:

[0017] The invention is energy-saving and environmentally friendly, and can monitor and measure the indicators in the well in real time; it is digitalized and intelligent; it integrates manual control and remote control; and it completely solves the defects of the commonly used wellhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0019] Figure 1 A schematic diagram of a wellhead and a wellhead process manifold provided in an embodiment of the present invention;

[0020] Figure 2 A schematic top view of a wellhead, a process manifold, and pipelines provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of a wellhead, process manifold, and electrical top view provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this document. In addition, in order to simplify the drawings, the same or similar technical features may be marked only in one place in the same drawing.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0024] like Figure 1 , a rodless oil production digital intelligent wellhead provided in this embodiment includes a wellhead oil production wellhead part and a production process manifold part;

[0025] It also includes a flow meter, a pressure gauge, and a thermometer; the flow meter is installed on one side of the production gate valve on one side of the wellhead oil production wellhead part; the pressure gauge and the thermometer are installed on one side of the production gate valve on the other side of the wellhead oil production wellhead part;

[0026] A constant pressure air release valve is installed on one side of the casing gate valve, and a check valve and a DN50 gate valve are installed on the single-volume production pipe and the mixed production pipe.

[0027] An electric pump cable penetration sealer 36 is installed on the special upper flange 34 for the electric pump well, and the electric pump cable penetration sealer 36 includes a penetration body 36-1, a cable sealing sleeve 36-2, an anti-rotation pressure cap 36-3, and a sealing pressure cap 36-4; the lower end of the penetration body 36-1 is a 1.9UPTBG thread, and the upper end is a seamless pipe with a tapered mouth, the upper end of which is internally covered with a cable sealing sleeve 36-2, and the outer side of the upper end is inserted with an anti-rotation pressure cap 36-3, the inner end face of the inner cavity of the anti-rotation pressure cap 36-3 is crimped with the cable sealing sleeve 36-2, the sealing pressure cap 36-4 is threadedly connected to the penetration body 36-1, and the inner cavity shoulder end face is crimped with the anti-rotation pressure cap 36-3.

[0028] The electric pump cable enters the inner cavity of the electric pump cable through the outer wall of the downhole oil pipe 36, and the three main power lines pass through the three holes inside the cable sealing sleeve 36-2 and are led to the integrated control room 53 through the anti-rotation pressure cap 36-3 and the sealing pressure cap 36-4 (refer to Figure 3 Electrical top view), when the sealing pressure cap 36-4 is rotating, the internal shoulder is lifted under the action of the thread to press the anti-rotation pressure cap 36-3 downward, and the anti-rotation pressure cap 36-3 is inserted into the through body 36-1 to prevent rotation. The inner cavity end face of the pressure cap presses the cable sealing sleeve 36-2 downward and forces the cable sealing sleeve 36-2 to move downward. During the downward movement of the cable sealing sleeve 36-2, it is affected by the conical surface at the upper end of the through body 36-1 and shrinks as a whole to press the electric pump cable to form a seal.

[0029] The production process manifold part includes single-volume production process manifold and mixed-volume production process manifold;

[0030] The process manifold for the single-volume production process includes a single-volume pipe 1, a DN50 gate valve 2, a DN50 double-wire short-circuit 3, a check valve 4, and a flexible joint 5, which are connected in sequence; the flexible joint 5 is connected to one end of a flange reducing tee 9, and the other end of the flange reducing tee 9 is connected to a positive well-washing gate valve 8, a clamp 7, and a plug 6 in sequence; the third end of the flange reducing tee 9 is connected to a flow meter 10, a flange short-circuit 11, and a gate valve 12 in sequence; during the production process, the gate valve 12 is opened to produce The liquid enters the single production pipeline 43 through the gate valve 12, flange short-circuit 11, flow meter 10, flange reducing tee 9, union 5, check valve 4, DN50 double-wire short-circuit 3, DN50 gate valve 2, and the inner cavity of the single volume tube 1, and then goes through the single production pipeline 43 to the metering skid 48. The gate valve 12 will perform real-time detection and metering of the produced liquid. At the same time, the metering skid 48 will measure the produced liquid of each well separately. After metering, it enters the single production collection pipeline 46 through the mixed outlet until it reaches the transfer station 49.

[0031] The mixed production process manifold includes a gate valve three 16, a composite short circuit 17, a flexible joint 25, a check valve two 26, a DN50 gate valve two 27, and a mixed production pipe 28 connected in sequence; a pressure gauge 19 and a thermometer 21 are respectively installed on the composite short circuit through a pressure gauge base 18 and a thermometer base 20; during the production process, the gate valve one 12 is closed and the gate valve three 16 is opened, and the produced fluid enters the mixed production pipeline 45 through the lifting short circuit 31, the large four-way 33, the oil pipe short circuit 35, the gate valve three 16, the composite short circuit 17, the flexible joint 25, the check valve two 26, the DN50 gate valve two 27, and the mixed production pipe 28, and enters the transfer station 49 through the stop valve 47, the pressure gauge 19 performs real-time monitoring and measurement of the pressure in the pipe (in the well), and the thermometer 21 performs real-time detection and measurement of the temperature in the pipe (in the well).

[0032] Production process manifolds prevent backflow: Single-volume production process manifolds and mixed-volume production process manifolds are respectively equipped with check valve 4 and check valve 26. The feature is that when multiple wells are mined at the same time, it prevents the produced fluid from the high-pressure well from flowing back into the low-pressure well to form a backflow, affecting the mining efficiency. At the same time, the process manifolds are respectively equipped with DN50 gate valve 2 and DN50 gate valve 27, and the produced pipeline can be closed at any time if there is a safety hazard.

[0033] It also includes a casing pressure constant pressure bleed valve assembly, including a pressure measuring tee 38; the two ends of the pressure measuring tee 38 are respectively connected to a gate valve 5 37 and a casing pressure gauge 39; the third end of the pressure measuring tee 38 is connected in sequence to a constant pressure bleed valve 40, a conversion joint 42, and a casing gas short circuit 41; during the production process, the gate valve 5 37 is normally open, and the constant pressure bleed valve 40 sets parameters as needed. When the oil casing environmental control pressure is greater than the set pressure, the constant pressure bleed valve 40 opens the high-pressure liquid and gas to be discharged to the casing gas pipeline 44 in real time, and enters the transfer station 49 through the stop valve 47.

[0034] Specifically, Figure 1 、 2As shown in , 3, on the basis of the above technical solution, the single-volume tube 1 is a seamless anti-corrosion pipe with an inner diameter of ∮50-∮89mm, the lower end of which is welded (threadedly connected) to a single-collection pipeline, and the upper end is threadedly connected to a DN50 gate valve 2, the DN50 gate valve 2 is a stop-type gate valve with an inner diameter of ∮50mm, the upper end is threadedly connected to the lower end of a DN50 double-wire short-circuit 3, the upper end of the DN50 double-wire short-circuit 3 is threadedly connected to a check valve 4, the check valve 4 is a stop-type check valve with unidirectional liquid flow, the upper end of which is threadedly connected to a live joint 5, the live joint 5 has two internal upper and lower parts that are mechanically sealed, and is sealed as the threads are tightened, and at the same time there is a freely movable union-type live joint, the upper end of the live joint 5 is threadedly connected to the reducing end of a flange reducing tee 9, and the clamp 7 has clamps at both ends inside An independent clamp head with a head and internal thread, a middle steel ring mechanical seal, and a clamp that can achieve a tight seal as the bolts are tightened, the left end of which is threadedly connected to a wire plug 6, and the right end is clamped to a positive well washing gate valve 8, the left end of the positive well washing gate valve 8 is clamped to a flange reducing tee 9 with threads, the right end of the flange reducing tee 9 is flange-connected to a flow meter 10, the right end of the flow meter 10 is flange-connected to a flange short-circuit 11, the right end of the flange short-circuit 11 is clamped to a gate valve 12 through a threaded clamp, the right end of the gate valve 12 is clamped to a small four-way 15, the four ends of the small four-way 15 are all equal-diameter four-way connected by clamps, the upper end of the small four-way 15 is clamped to a gate valve 2 13, the upper end of the gate valve 2 13 is connected to an electric heating device 14 through a clamp thread, and the right end of the small four-way 15 is clamped to the gate valve Three 16, the right end of the gate valve three 16 is connected to the composite short-circuit 17 through a clamp thread. The composite short-circuit 17 is a ∮73mm oil pipe short-circuit. The pressure gauge base 18 and the thermometer base 20 are welded (threaded) on the upper side of the pipe body. The pressure gauge 19 is threadedly connected to the pressure gauge base 18, and the thermometer 21 is threadedly connected to the thermometer base 20. The right end of the composite short-circuit 17 is connected to the gate valve four 22 through a threaded clamp. The right end of the gate valve four 22 is connected to the reducing tee 23 through a clamp thread. The right end of the reducing tee 23 is threadedly connected to the wire plug, and the lower reducing end is threadedly connected to the sampling valve 24. The sampling valve 24 is a DN15 sheep horn gate valve. The reducing end on the lower side of 17 is threadedly connected to the flexible joint 25, and the lower end of the flexible joint 25 is threadedly connected to the DN50 double-wire short-circuit 3, DN5 The lower end of the double-wire short-circuit 3 is threadedly connected to the check valve 26, and the lower end of the check valve 26 is threadedly connected to the DN50 double-wire short-circuit 3. The lower end of the DN50 double-wire short-circuit 3 is threadedly connected to the DN50 gate valve 27. The lower end of the DN50 gate valve 27 is threadedly connected to the mixed-out pipe 28. The mixed-out pipe 28 is a DN50 anti-corrosion seamless pipe, and its lower end is welded (threaded) to the mixed production pipeline 45. The oil pipe tee 29 is a high-pressure oil pipe tee, one end of which is connected to the backwash well gate valve 30 through a clamp-type thread, and the other two ends are respectively threadedly connected to the wire plug. The left end of the backwash well gate valve 30 is clamped and connected to the large four-way 33. The large four-way 33 is a large four-way dedicated to the wellhead of the oil well, and its lower end flange is connected to the large four-way lower flange 32. The lower end of the large four-way lower flange 32 is threadedly connected to the lifting short-circuit 31.The lower end of the lifting short-circuit 31 is threadedly connected to the casing in the well, and the upper end flange of the large four-way 33 is flanged to the upper flange 34 dedicated to the electric pump well. The lower end of the upper flange 34 dedicated to the electric pump well is threadedly connected to the oil pipe in the well. The side hole of the upper flange 34 dedicated to the electric pump well is threadedly connected to the electric pump cable through the sealer 36, and the upper end is threadedly connected to the oil pipe short-circuit 35. The upper end of the oil pipe short-circuit 35 is connected to the small four-way 15 through a threaded clamp. The lower end of the through body 36-1 is a 1.9UPTBG thread, and the upper end is a seamless pipe with a tapered mouth. The upper end of the cable sealing sleeve 36-2 is installed inside, and the anti-rotation pressure cap 36-3 is inserted outside the upper end. The inner end face of the anti-rotation pressure cap 36-3 is crimped with the cable sealing sleeve 36-2, and the sealing pressure cap 36-4 is threadedly connected to the main body 36-1, and the inner shoulder end face is crimped with the anti-rotation pressure cap 36-3. The left end of the large four-way 33 is clamped to the gate valve 5 37, and the left end of the gate valve 5 37 is connected to the pressure measuring tee 38 through the clamp thread. The pressure measuring tee 38 is an oil pipe with 4 threaded holes in the center of the plane side. A high-pressure tee, one port of which is connected to a constant-pressure air release valve 40 through a threaded clamp, and the four threaded holes are threadedly connected to a casing pressure gauge 39. The constant-pressure air release valve 40 is threadedly connected to a conversion joint 42 through a clamp, and the lower end of the conversion joint 42 is threadedly connected to 41, and the lower end of the conversion joint 41 is welded (threadedly connected) to a casing gas pipeline 44. The casing gas pipeline 44, the mixed sampling pipeline 45, and the single sampling collection pipeline 46 are pre-buried underground closed-loop pipelines, which are ∮89mm, ∮114mm, and ∮114mm, respectively. The oil pipe of mm is provided with a stop valve 47 at the position 2-50 meters before entering the transfer station 49. The main power cable 50, signal cable 51 and electric pump cable 52 are respectively the main power cable, electric pump cable and signal cable pre-buried underground, which are respectively led out from the inside of the integrated control room 53 and are comprehensively controlled by the integrated control room 53. The integrated control room 53 is an integrated control system (including manual control and remote wireless control, etc.) with main power supply of each single well, signal transmission and downhole electric pump power supply.

[0035] The underground pipeline pre-buried and process technology connection method is an existing technology, such as Figure 2 As shown, the underground pipeline formed by the single-production pipeline 43, the casing gas pipeline 44, the mixed production pipeline 45, the single-production collection pipeline 46, and the stop valve 47 and the connection method with the ground pipeline.

[0036] The arrangement method of wires and cables is also prior art, such as Figure 3 As shown, the main power cable 50, the signal cable 51, and the electric pump cable 52 are pre-buried underground and connected to the corresponding interfaces of the wellhead respectively; wherein the electrical part can be controlled manually or remotely.

[0037] The flowmeter includes a mass flowmeter, a differential pressure flowmeter, an ultrasonic flowmeter, an electromagnetic flowmeter, a turbine flowmeter, and an ultrasonic flowmeter.

[0038] The pressure gauge includes a liquid column pressure gauge, an elastic pressure gauge, an electric contact pressure instrument, a capacitive pressure sensor, a strain gauge pressure sensor, etc.

[0039] The thermometers include rotary thermometers, semiconductor thermometers, thermocouple thermometers, optical pyrometers, liquid crystal thermometers, and digital temperature sensors.

[0040] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A digital intelligent wellhead for rodless oil production. Features: Including wellhead oil production wellhead part, production process manifold part, wireless monitoring and metering part, electric heating, cable crossing part, underground pre-buried cable, signal cable part, underground pre-buried production pipeline part; It also includes a flow meter, a pressure gauge, and a thermometer; the flow meter is installed on one side of the production gate valve on one side of the wellhead oil production wellhead part; the pressure gauge and the thermometer are installed on one side of the production gate valve on the other side of the wellhead oil production wellhead part; A constant pressure air release valve is installed on one side of the casing gate valve, and a check valve and a DN50 gate valve are installed on the single-volume production pipe and the mixed production pipe.

2. According to claim 1, a rodless oil production digital intelligent wellhead, Features: An electric pump cable crossing sealer is installed on the special upper flange of the electric pump well, and the electric pump cable crossing sealer includes a crossing body, a cable sealing sleeve, an anti-rotation pressure cap and a sealing pressure cap; the lower end of the crossing body is a 1.9UPTBG thread, and the upper end is a seamless pipe with a tapered mouth, the upper end of which is internally covered with a cable sealing sleeve, and the outer side of the upper end is inserted with an anti-rotation pressure cap, the inner end face of the inner cavity of the anti-rotation pressure cap is crimped with the cable sealing sleeve, the sealing pressure cap is threadedly connected to the crossing body, and the inner cavity shoulder end face is crimped with the anti-rotation pressure cap.

3. According to the rodless oil production digital intelligent wellhead of claim 1, Features: The production process manifold part includes a single-volume production process manifold and a mixed-volume production process manifold.

4. According to claim 3, a rodless oil production digital intelligent wellhead, Features: The process manifold for the single-volume production process includes a single-volume pipe, a DN50 gate valve, a DN50 double-wire short-circuit, a check valve, and a flexible joint connected in sequence; the flexible joint is connected to one end of a flange reducing tee, and the other end of the flange reducing tee is connected in sequence to a positive well-washing gate valve, a clamp, and a plug, and the third end of the flange reducing tee is connected in sequence to a flow meter, a flange short-circuit, and a gate valve 1; during the production process, the gate valve 1 is opened, and the produced fluid enters the single production pipeline through the gate valve 1, the flange short-circuit, the flow meter, the flange reducing tee, the flexible joint, the check valve, the DN50 double-wire short-circuit, the DN50 gate valve, and the inner cavity of the single-volume pipe, and then reaches the metering skid through the single production pipeline. The gate valve 1 will perform real-time detection and metering of the produced fluid, and at the same time, the metering skid will meter the produced fluid of each well separately. After metering, it enters the single production collection pipeline through the mixed outlet until it reaches the transfer station.

5. According to claim 3, a rodless oil production digital intelligent wellhead, Features: The mixed production process manifold includes a gate valve three, a composite short circuit, a flexible joint two, a check valve two, a DN50 gate valve two, and a mixed output pipe connected in sequence; a pressure gauge and a thermometer are installed on the composite short circuit through a pressure gauge base and a thermometer base respectively; during the production process, the gate valve one is closed and the gate valve three is opened, and the produced fluid enters the mixed production pipeline through the lifting short circuit, the large four-way, the oil pipe short circuit, the gate valve three, the composite short circuit, the flexible joint two, the check valve two, the DN50 gate valve two, and the mixed output pipe, and enters the transfer station through the stop valve, the pressure gauge monitors and measures the pressure in the pipe in real time, and the thermometer detects and measures the temperature in the pipe in real time.

6. According to claim 3, a rodless oil production digital intelligent wellhead, Features: The process manifolds for the single-volume production process and the process manifolds for the mixed production process are installed with a check valve and a second check valve respectively. When multiple wells are mined at the same time, this prevents the produced fluid from the high-pressure wells from flowing back into the low-pressure wells and forming reflux. At the same time, the process manifolds are installed with a DN50 gate valve and a second DN50 gate valve respectively. The produced pipeline can be closed at any time if there is a safety hazard.

7. According to claim 1, a rodless oil production digital intelligent wellhead, Features: It also includes a casing pressure constant pressure bleed valve assembly, including a pressure measuring tee; the two ends of the pressure measuring tee are respectively connected to a gate valve five and a casing pressure gauge; the third end of the pressure measuring tee is sequentially connected to a constant pressure bleed valve, a conversion joint, and a casing gas short circuit; during the production process, the gate valve five is normally open, and the constant pressure bleed valve sets parameters as needed. When the casing environmental control pressure is greater than the set pressure, the constant pressure bleed valve opens the high-pressure liquid and gas to be discharged to the casing gas pipeline in real time, and enters the transfer station through the stop valve.

8. According to claim 1, a rodless oil production digital intelligent wellhead, Features: The flowmeter includes a mass flowmeter, a differential pressure flowmeter, an ultrasonic flowmeter, an electromagnetic flowmeter, a turbine flowmeter, and an ultrasonic flowmeter.

9. According to claim 1, a rodless oil production digital intelligent wellhead, Features: The pressure gauge includes a liquid column pressure gauge, an elastic pressure gauge, an electric contact pressure instrument, a capacitive pressure sensor, a strain gauge pressure sensor, etc.

10. The digital intelligent wellhead for rodless oil production according to claim 1, Features: The thermometers include rotary thermometers, semiconductor thermometers, thermocouple thermometers, optical pyrometers, liquid crystal thermometers, and digital temperature sensors.

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