CN214221145U

CN214221145U - Wellhead sealing valve capable of measuring oil output

Info

Publication number: CN214221145U
Application number: CN202120145734.4U
Authority: CN
Inventors: 曹健
Original assignee: Chinatech Petroleum Technology Chengdu Co Ltd
Current assignee: Chinatech Petroleum Technology Chengdu Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-09-17
Anticipated expiration: 2031-01-20

Abstract

The utility model provides a can measure well head sealing valve of oil output relates to one kind and is used for the well head field of sealing, install the case in the valve pocket of valve body, install the sealing washer between case and the piston push rod, case upper portion installation spring, the gland is fixed on valve body upper portion, connect pressure sensor between gland and the spring, pressure sensor one end coupling spring, pressure sensor one end links to each other with the outside computer, spring adjusting bolt installs on the hydro-cylinder flange, spring adjusting bolt front end and gland contact, the valve body lower part is provided with the oil-out, install electronic pressure gauge on the outer wall of oil-out, such structure, make the oil of oil well can't get into inside the hydro-cylinder, increase the life of hydro-cylinder and hydraulic oil, get rid of the problem that the oil corrodes the sealing system and pollutes the hydraulic oil in the hydro-cylinder.

Description

Wellhead sealing valve capable of measuring oil output

Technical Field

The utility model belongs to the technical field of a well head seal valve and specifically relates to a can measure out oil volume that is used for hydraulic pumping unit to be connected with the oil well head.

Background

The well head connected mode in present hydraulic pumping unit field has two kinds, firstly erects the hydro-cylinder, and the hydro-cylinder push rod is connected with the polished rod, and the push rod works in the pit, and the polished rod is sealed by the packing, need often change the packing strip in the packing box in the use, especially very difficult to the oil field operation in remote area. Meanwhile, the installation height of the oil cylinder is at least one time greater than the length of the oil cylinder. And secondly, the oil cylinder is directly arranged on the wellhead of the oil well, the oil cylinder flange is connected with the wellhead flange and sealed by a sealing ring, although the installation height can be reduced by half, because the underground high-pressure oil is directly in sealing contact with the lower part of the oil cylinder, the oil can gradually corrode a sealing system and pollute hydraulic oil in the oil cylinder, the sealing of the oil cylinder is invalid, the service lives of the oil cylinder and the hydraulic oil are shortened, and therefore frequent stopping for repairing the oil cylinder and replacing the hydraulic oil are needed, the cost is increased, and the yield of the oil well is influenced.

In addition, single well metering is a difficult problem faced by all oil fields, and the only feasible method at present is skip metering. But the equipment has low automation degree, large volume, complex installation and high cost, and cannot be popularized on a large scale.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can measure the well head sealing valve who produces oil volume simultaneously in order to solve hydraulic pumping unit's mounting height and the sealed problem that the well head is connected.

The technical scheme of the utility model: a well mouth sealing valve capable of measuring oil output comprises an oil cylinder, an oil cylinder piston, a piston push rod, an oil cylinder oil discharge port, a spring, a valve core, an oil outlet, an oil pipe, a well mouth flange, a valve body, a steel ring, an oil discharge port, a pressure sensor, a gland, an adjusting bolt, a coupling, a sucker rod and an oil storage tank, wherein the lower part of the valve body is fixedly connected with the well mouth flange through a bolt, the upper part of the valve body is connected with a flange at the bottom of the oil cylinder through a bolt, the oil cylinder piston and the piston push rod are arranged in the oil cylinder, the piston push rod is fixedly connected with the oil cylinder piston, the piston push rod drives the oil cylinder piston to move, the valve core is arranged in a valve cavity of the valve body, a sealing ring is arranged between the valve core and the piston push rod, the spring is arranged on the upper part of the valve core, the gland is fixed on the upper part of the valve body, the pressure sensor is connected with the spring, one end of the pressure sensor is connected with an outer computer, the spring adjusting bolt is installed on the oil cylinder flange, the front end of the spring adjusting bolt is in contact with the gland, an oil outlet is formed in the lower portion of the valve body, an electronic pressure gauge is installed on the outer wall of the oil outlet, the piston push rod penetrates through the valve body and enters an oil pipe of an oil well, a gap is formed between the piston push rod and the valve body, oil is filled in the gap, a gap is formed between the oil pipe and the piston push rod, oil is filled in the gap, and the piston push rod is connected with an oil well sucker rod through a coupling. Still be provided with the hydro-cylinder oil drain port on the hydro-cylinder, the sealed trace hydraulic oil accessible hydro-cylinder oil drain port that leaks under the hydro-cylinder discharges, and the oil storage tank can store the trace oil of taking out from hydro-cylinder piston push rod to discharge through the oil drain port. The discharged oil can be collected in a unified way through an external pipeline. The discharged oil can be collected in a unified way through an external pipeline.

The height of the valve core is larger than the diameter of the oil outlet.

The oil cylinder is also provided with an oil cylinder oil outlet which is arranged between the oil cylinder and the spring adjusting bolt.

The valve body is connected with a wellhead flange and sealed by a steel ring. The valve core can move up and down in the valve body. The spring adjusting bolt changes the position of the gland so as to adjust the preset pressure of the spring to be matched with the underground pressure.

The oil cylinder piston push rod passes through the valve core and moves up and down to drive the oil pumping rod to move, so that oil pumping is realized. The sealing of the petroleum is realized by a valve core sealing ring.

The valve core is arranged in the valve body, the valve core can move up and down in the valve body, the movement stroke of the valve core is determined by the elastic coefficient of the spring, the oil pressure of the oil well and the pressure of the oil outlet pipe, the elastic coefficient of the spring is a known number, the oil pressure of the oil well can be measured by a pressure sensor in real time, and the pressure of the oil outlet pipe can be measured by an electronic pressure gauge in real time. And the dynamic real-time volume of the lower valve cavity of the valve body is calculated according to the diameter of the valve core and the instant stroke of the valve core, so that the oil output is measured.

And trace petroleum and hydraulic oil leakage can be respectively recycled to an oil conveying pipeline and an oil tank of a hydraulic system through a specially-arranged oil storage cavity and an oil discharge port.

The utility model has the advantages that: the instant stroke of the valve core can be calculated through the pressure signal and the timing signal output by the pressure sensor, the parameter of the spring and the pressure signal output by the electronic pressure gauge, so that the real-time volume of the oil storage cavity of the valve body is determined, and the oil output can be calculated according to the data.

The position of the gland can be changed through the adjusting bolt, so that the preset pressure of the spring is adjusted to be matched with the underground pressure, and the oil outlet efficiency is improved.

The oil storage tank can store a trace amount of oil brought out from the push rod of the oil cylinder piston and discharge the oil through the oil discharge port. The discharged oil can be collected in a unified way through an external pipeline.

And a trace amount of hydraulic oil leaked from the lower seal of the oil cylinder can flow back to an oil tank of the hydraulic system through a pipeline.

The sealing combination and the dust cover are made of polytetrafluoroethylene materials, so that the wear resistance and the corrosion resistance are good, and the service life is more than three years.

The valve body and the valve core are made of nodular cast iron materials, and the inner surface of the valve body and the valve core is coated with a polytetrafluoroethylene coating and can be used permanently.

Drawings

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

Fig. 2 is a schematic diagram of the oil-out closed state of the present invention.

Fig. 3 is a schematic diagram of the oil-out half-open state of the present invention.

Fig. 4 is a schematic diagram of the oil-out opening state of the present invention.

In the figure, 1 is an oil cylinder, 2 is an oil cylinder piston, 3 is a piston push rod, 4 is an oil cylinder oil discharge port, 5 is a spring, 6 is a valve core, 7 is an oil outlet, 8 is an oil pipe, 9 is a wellhead flange, 10 is a valve body, 11 is a steel ring, 12 is an oil discharge port, 13 is a pressure sensor, 14 is a gland, 15 is a spring adjusting bolt, 16 is a coupling, 17 is a sucker rod, and 18 is an oil storage tank.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

A well mouth sealing valve capable of measuring oil output comprises an oil cylinder 1, an oil cylinder piston 2, a piston push rod 3, an oil cylinder oil outlet 4, a spring 5, a valve core 6, an oil outlet 7, an oil pipe 8, a well mouth flange 9, a valve body 10, a steel ring 11, an oil outlet 12, a pressure sensor 13, a gland 14, an adjusting bolt 15, a coupling 16, a sucker rod 17 and an oil storage tank 18, wherein the lower part of the valve body 1 is fixedly connected with the well mouth flange 9 through a bolt, the upper part of the valve body 10 is connected with a bottom flange of the oil cylinder 1 through a bolt, the oil cylinder piston 2 and the piston push rod 3 are arranged in the oil cylinder 1, the piston push rod 3 is fixedly connected with the oil cylinder piston 2, the piston push rod 3 drives the oil cylinder piston 2 to move, the hollow valve core 6 is arranged in a valve cavity of the valve body 10, a sealing ring is arranged between the valve core 6 and the piston push rod 3, the spring 5 is arranged on the upper part of the valve core 6, and the gland 14 is fixed on the upper part of the valve body 10, a pressure sensor 13 is connected between a gland 14 and a spring, one end of the pressure sensor 13 is connected with a spring 5, one end of the pressure sensor 13 is connected with an outer computer, a spring adjusting bolt 15 is installed on a flange of an oil cylinder 1, the front end of the spring adjusting bolt 15 is in contact with the gland 14, one side of a valve core 6 is provided with an oil discharge port 12, the lower part of a valve body 10 is provided with an oil discharge port 7, an electronic pressure gauge 71 is installed on the outer wall of the oil discharge port 7, a piston push rod 3 penetrates through the valve body 10 to enter an oil pipe 8 of an oil well, a gap is reserved between the oil pipe 8 and the piston push rod 3, oil is filled in the gap, the piston push rod 3 is connected with an oil well sucker rod 17 through a coupling.

As shown in figure 1, the connection mode of the valve, the hydraulic oil pumping unit oil cylinder and the oil well mouth is as follows:

1. the valve core 6 provided with the sealing ring, the spring 5 and the gland 14 provided with the pressure sensor 13 and the sealing ring are sequentially arranged in the valve cavity of the valve body.

2. The piston push rod 3 of the oil cylinder 1 is inserted into the valve core 6.

3. The valve body 10 is connected with the flange of the oil cylinder 1 by bolts.

4. The piston push rod 3 in the oil cylinder 1 is connected with an oil well sucker rod 17 through a coupling 16.

5. The valve body flange is connected with the wellhead flange 9 and sealed by a steel ring 11.

6. The spring adjusting bolt 15 is installed on the flange of the oil cylinder 1 and adjusts the elastic force to preset the elastic force.

6. All the connecting bolts are fastened, and after the installation is finished, the hydraulic pumping unit can start to work.

Fig. 2, 3 and 4 show different working states of the valve:

an oil well sucker rod 17 is connected with a piston push rod 3 in an oil cylinder 1, when the oil well sucker rod 17 drives the piston push rod 3 in the oil cylinder 1 to move downwards, oil pressure is reduced, a spring 5 in a valve body 10 is pressed, the spring 5 is connected with a pressure sensor 13, a spring adjusting bolt 15 is installed on a flange of the oil cylinder 1, the front end of the spring adjusting bolt 15 is contacted with a gland 14, the position of the gland 14 is changed through the spring adjusting bolt 15, so that preset pressure of the spring is adjusted to be matched with underground pressure, an electronic pressure gauge 71 is installed on an oil outlet 7, when the pressure of the spring 5 is greater than the oil pressure, a valve core 6 moves downwards under the action of the pressure of the spring 5, the valve core 6 blocks the oil outlet 7, the oil outlet 7 is in a closed state, and the instant stroke of the valve core 6 can be calculated through a pressure signal and a timing signal output by the pressure sensor 13 and parameters of the spring 5 and a pressure signal output by the electronic pressure gauge 71, therefore, the real-time volume of the oil storage cavity of the valve body is determined, and the oil outlet quantity can be calculated according to the data.

The moving stroke of the valve core 6 is determined by the elastic coefficient of the spring 5, the oil pressure of the oil well and the pressure of the oil outlet pipe, the elastic coefficient of the spring is a known number, the oil pressure of the oil well can be measured by a pressure sensor in real time, and the pressure of the oil outlet can be measured by an electronic pressure gauge in real time.

When the piston push rod 3 drives the oil well sucker rod 17 to move upwards, the oil pressure rises, when the oil pressure is larger than the pressure of the spring 5, the oil cylinder piston 2 moves upwards, the valve core 6 moves upwards, the oil outlet is opened, oil enters the oil outlet 7, the oil is discharged through the oil outlet 7, the oil is discharged more, the oil pressure is high, the displacement of the valve core 6 is large, and the opening degree of the oil outlet 7 is large. Therefore, when the piston push rod 3 moves upwards, the surplus oil brought out can be discharged from the oil outlet 7, an oil storage groove 18 is formed in one side of the valve core 6, the oil storage groove 18 can store a small amount of oil brought out from the oil cylinder piston push rod, and when the valve core 6 moves, the oil storage groove 18 is communicated with an oil discharge port 12 of the valve body and discharges oil through the oil discharge port 12. And a small amount of hydraulic oil leaked from the lower seal of the oil cylinder can flow back to an oil tank of the hydraulic system through an oil pipe. By adopting the structure, the petroleum in the oil well can not enter the oil cylinder, the service lives of the oil cylinder and the hydraulic oil are prolonged, and the problems that the petroleum corrodes a sealing system and pollutes the hydraulic oil in the oil cylinder are solved.

Claims

1. The utility model provides a can measure well head sealing valve of oil yield, includes hydro-cylinder (1), hydro-cylinder piston (2), piston push rod (3), hydro-cylinder oil drain port (4), spring (5), case (6), oil-out (7), oil pipe (8), well head flange (9), valve body (10), steel ring (11), oil drain port (12), pressure sensor (13), gland (14), adjusting bolt (15), coupling (16), sucker rod (17), oil storage tank (18), its characterized in that: the lower part of a valve body (10) is fixedly connected with a wellhead flange (9) through a bolt, the upper part of the valve body (10) is connected with a bottom flange of an oil cylinder (1) through a bolt, an oil cylinder piston (2) and a piston push rod (3) are arranged in the oil cylinder (1), the piston push rod (3) is fixedly connected with the oil cylinder piston (2), the piston push rod (3) drives the oil cylinder piston (2) to move, a valve core (6) is arranged in a valve cavity of the valve body (10), a sealing ring is arranged between the valve core (6) and the piston push rod (3), a spring (5) is arranged on the upper part of the valve core (6), a gland (14) is fixed on the upper part of the valve body (10), a pressure sensor (13) is connected between the gland (14) and the spring, one end of the pressure sensor (13) is connected with the spring (5), one end of the pressure sensor, the front end of a spring adjusting bolt (15) is in contact with a gland (14), an oil outlet (7) is arranged at the lower part of a valve body (10), an electronic pressure gauge (71) is installed on the outer wall of the oil outlet (7), a piston push rod (3) penetrates through the valve body (10) to enter an oil pipe (8) of an oil well, a gap is formed between the piston push rod (3) and the valve body, oil is filled in the gap, and the piston push rod (3) is connected with an oil well sucker rod (17) through a coupling (16).

2. The wellhead sealing valve capable of metering oil output according to claim 1, wherein: the valve core (6) is a hollow valve core and can move up and down in the valve body (10), the valve body and the valve core are made of nodular cast iron materials, and the inner surface of the valve body and the valve core is coated with a polytetrafluoroethylene coating.

3. A metered flow rate wellhead seal valve as claimed in claim 1 or claim 2 wherein: the height of the valve core (6) is larger than the diameter of the oil outlet (7).

4. The wellhead sealing valve capable of metering oil output according to claim 1, wherein: the oil cylinder (1) is further provided with an oil cylinder oil outlet (4), and the oil cylinder oil outlet (4) is arranged between the oil cylinder (1) and the spring adjusting bolt (15).

5. The wellhead sealing valve capable of metering oil output according to claim 1, wherein: an oil storage tank (18) is arranged on one side of the valve core (6), and when the valve core (6) runs, the oil storage tank (18) is communicated with an oil discharge port (12) of the valve body and discharges oil through the oil discharge port (12).

6. The wellhead sealing valve capable of metering oil output according to claim 1, wherein: the valve body (10) is connected with a wellhead flange (9) and is sealed by a steel ring (11).