CN212272188U - Oil well sampling pressure-holding prevention device and oil well sampling system - Google Patents

Abstract

The utility model provides a pressure equipment and oil well sampling system are prevented holding back in oil well sample sets up in the riser and is located the below of the sample connection on the riser, including valve plate and rotatory hand wheel, the valve plate is located in the riser, rotatory hand wheel is located outside the riser and with the valve plate links to each other, rotatory hand wheel is used for the drive the valve plate rotates, so that the outward flange of valve plate with clearance between the riser inner wall is adjustable, the utility model provides a pressure equipment and oil well sampling system are prevented holding back in oil well sample has solved the sampling difficulty that exists when prior art oil well sample, and is long, the problem that the risk is high when consuming time.

Description

Oil well sampling pressure-holding prevention device and oil well sampling system

Technical Field

The utility model relates to an oil well sample technical field especially relates to an oil well sample prevents suppressing pressure equipment and oil well sampling system.

Background

In the oil extraction metering work of the oil well, oil well sampling is a crucial link, the accuracy of oil field metering data can be ensured only by obtaining an accurate oil sample, and meanwhile, reasonable oil well measures can be formulated only by reflecting the production dynamics of the oil well really by the accurate oil sample data.

At present, a sampling device used by an oil well is a steel pipe short joint welded on a straight pipe section or a vertical pipe section of a pipeline behind a Christmas tree oil nozzle, a cock valve is installed on the short joint, and sampling is carried out by opening the cock valve.

However, when the method is used for sampling, the sampling is difficult, the time consumption is long, the risk is high, the degassing of the produced liquid in the later production stage of part of the oil well is serious, as the liquid inertia is large, most of the liquid can not change the direction and enter a sampling channel, in order to obtain an oil sample meeting the volume required by the test, a cock valve needs to be opened for a long time to wait for sampling, so that a large amount of oil well gas is leaked, part of the oil well is high in hydrogen sulfide content, the potential safety hazard is large, the working strength of workers is high, part of the oil well needs to wait for 1 to 2 hours for sampling, in addition, the data difference of the obtained sample is large, the water content of the oil well cannot be truly reflected, particularly when the oil well contains free water, as the viscosity of water is small, the fluidity is good, the viscosity of crude oil is large, the fluidity is poor, the, the oil sample obtained according to the traditional sampling device has larger error.

SUMMERY OF THE UTILITY MODEL

In order to solve the sample difficulty that exists when the prior art oil well sample, long, the high problem of risk consume time, the utility model provides a device and oil well sampling system are prevented holding back pressure in oil well sample.

The utility model provides an oil well sample pressure-holding device that prevents builds out sets up in the riser and is located the below of the sample connection on the riser, include:

the valve plate is located in the vertical pipe, the rotary hand wheel is located outside the vertical pipe and connected with the valve plate, and the rotary hand wheel is used for driving the valve plate to rotate so that the outer edge of the valve plate and a gap between the inner walls of the vertical pipe can be adjusted.

The utility model discloses an among the concrete embodiment, the valve plate include main valve plate and with the main valve plate rotates the upset valve plate that links to each other, rotatory hand wheel with main valve plate links to each other, just pressure in the riser is greater than during the upset pressure of upset valve plate, the upset valve plate rotates, so that the upset valve plate with form the pressure release mouth between the riser inner wall.

The utility model discloses an among the concrete embodiment, main valve plate with circular structure or oval structure are constituteed to the upset valve plate, just the area of main valve plate is greater than the area of upset valve plate.

The utility model discloses an among the concrete embodiment, main valve plate with rotate through the trip shaft between the upset valve plate and link to each other, just the upset spring is established to the cover on the trip shaft, the one end of upset spring is supported on the upset valve plate, the other end of upset spring is supported on the main valve plate.

The utility model discloses an among the embodiment, still include: the valve center shaft transversely wears to establish on the riser and with sealed rotation sets up between the riser, just the one end of valve center shaft with rotatory hand wheel links to each other, the valve center shaft is located part in the riser with main valve plate links to each other.

In the specific embodiment of the utility model, the peripheries of both ends of the valve central shaft are provided with external threads, and the vertical pipe is provided with a hole for the valve central shaft to pass through;

the external thread is in threaded connection with the sealing nut, so that the valve central shaft is rotatably arranged on the vertical pipe.

The utility model discloses an among the embodiment, still include:

the sealing rings are respectively sleeved at two ends of the valve central shaft and are positioned between the sealing nut and the outer wall of the vertical pipe, so that the valve central shaft and the vertical pipe are sealed.

In a particular embodiment of the present invention, the turning spring is a torsion spring.

The utility model also provides an oil well sampling system, including riser, sampling tube, storage appearance container and the aforesaid arbitrary oil well sample prevent suppressing the pressure equipment and put, the one end of sampling tube with the sample connection of seting up on the riser, the other end of sampling tube extends to store up appearance container department, just be equipped with the control valve on the sampling tube, the oil well sample prevents suppressing the pressure equipment and sets up in the riser, just the oil well sample prevents suppressing the pressure equipment and is located under the sample connection.

The utility model discloses an among the concrete embodiment, oil well sample pressure-resistant device is located the below of sample connection just is close to the sample connection.

The utility model provides a pressure-proof device is prevented holding back in oil well sample sets up in the riser and is located the below of sample connection on the riser, through including valve plate and rotatory hand wheel, the valve plate is located in the riser, rotatory hand wheel is located outside the riser and with the valve plate links to each other, rotatory hand wheel is used for driving the valve plate rotates, so that the clearance between the outward flange of valve plate and the riser inner wall is adjustable, like this, when taking a sample, rotatory hand wheel drive valve plate rotates, and the valve plate can play the effect of blockking fluid, thereby ensures to get the oil sample that satisfies assay requirement volume fast, has avoided needing to open control valve for a long time and wait to take a sample and lead to the low and can produce the problem that oil well gas leaks out, thereby has saved the sample time and has reduced the sample degree of difficulty, therefore, the utility model provides a pressure-proof device is prevented holding back in oil well sample, the problems of difficult sampling, long time consumption and high risk in the sampling process of the oil well in the prior art are solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of a valve plate and a rotating hand wheel in an oil well sampling anti-choke device provided in the first embodiment of the present invention;

fig. 2a is a schematic structural view of a main valve plate and a turnover valve plate in an oil well sampling anti-blocking device provided in the first embodiment of the present invention;

fig. 2b is a schematic structural view of a main valve plate and a turnover valve plate in another oil well sampling anti-blocking device provided in the first embodiment of the present invention;

fig. 3 is a schematic structural view of a main valve plate and a rotating hand wheel in the oil well sampling anti-choke device provided in the first embodiment of the present invention;

fig. 4 is a schematic structural diagram of an oil well sampling system according to a second embodiment of the present invention;

fig. 5 is a schematic structural diagram of another oil well sampling system provided in the second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a nut according to an embodiment of the present invention.

Description of reference numerals:

10: a riser;

11: a sampling port;

20: a valve plate;

21: a main valve plate;

22: turning over the valve plate;

23: a turning shaft;

24: turning over the spring;

25: a valve central axis;

26: an external thread;

27: a seal nut;

28: a seal ring;

30: rotating a hand wheel;

40: a sampling tube;

50: a sample storage container;

60: a control valve;

70: an oil well sampling system.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is the utility model provides a structural schematic diagram of valve plate and rotatory hand wheel in the oil well sample pressure suppression device that provides, fig. 2a does the utility model provides a main valve plate and the structural schematic diagram of upset valve plate in the oil well sample pressure suppression device that provides, fig. 2b does the utility model provides an another kind of oil well sample pressure suppression device that provides in the structural schematic diagram of main valve plate and upset valve plate, fig. 3 is the utility model provides a structural schematic diagram of main valve plate and rotatory hand wheel in the oil well sample pressure suppression device that prevents provided.

The embodiment provides a device and oil well sampling system are prevented holding down pressure to oil well sample, can be applied to the supplementary sampling device of oil well production in-process to install in oil well production tree glib talker back pipeline, in order to obtain the oil sample of accuracy, in this embodiment, this device is prevented holding down pressure to oil well sample specifically installs in the riser of production tree glib talker back pipeline, thereby the completion is to the sample of oil well.

Example one

Referring to fig. 1 and 4, the oil well sampling pressure-holding prevention device is arranged in a riser 10 and below a sampling port 11 on the riser 10, and may include a valve plate 20 and a rotating hand wheel 30, the valve plate 20 is located in the riser 10, the rotating hand wheel 30 is located outside the riser 10 and connected to the valve plate 20, and the rotating hand wheel 30 is used for driving the valve plate 20 to rotate, so that a gap between an outer edge of the valve plate 20 and an inner wall of the riser 10 is adjustable.

In this embodiment, the oil well sampling anti-choke device may be disposed in the riser 10 and below the sampling port 11 on the riser 10, for example, as shown in the following fig. 4, in this embodiment, the sampling anti-choke device is disposed in the riser 10 and below the sampling port 11 on the riser 10, the sampling port 11 is communicated with the oil in the oil well, so that when the oil in the oil well is sampled, the sampling anti-choke device in the riser 10 can contact with the oil and achieve the function of blocking fluid, and the oil flows in the riser 10 and is stored on the sampling anti-choke device, under the blocking function of the sampling anti-choke device, the direction of the oil flowing in the riser 10 changes, when the height stored on the sampling anti-choke device is close to or higher than the sampling port 11 on the riser 10, the oil flows into the sampling port 11 from the riser 10, and flow out from the sampling port 11, for example, as shown in fig. 4, oil flows in the riser along the direction of the arrow in fig. 4, so that a sampling anti-choke device is arranged in the riser 10, an oil well produced liquid sample can be quickly obtained when oil is taken from a low-yield well, the sampling time of operators is saved, the working strength of the operators is reduced, and the problems of leakage of a large amount of oil well gas and great potential safety hazard are not caused while sampling is waited.

In this embodiment, the oil well sampling anti-choke device may include a valve plate 20 and a rotary hand wheel 30, the valve plate 20 is located in the vertical pipe 10, the rotary hand wheel 30 is located outside the vertical pipe 10 and connected to the valve plate 20, when sampling oil in the oil well, the rotary hand wheel 30 may be rotated to drive the valve plate 20 to rotate and control the opening of the valve plate 20 according to the oil output, when sampling the low-yield well, the rotary hand wheel 30 may be rotated to make the valve plate 20 horizontally located in the vertical pipe 10, so that when the oil flows in the vertical pipe 10, the oil may be blocked by the valve plate 20 and the flowing direction of the oil may be changed, and the oil may flow into the sampling port 11, thereby realizing sampling and collecting the oil, when sampling the oil in the oil well is not needed, the rotary hand wheel 30 may be rotated to drive the valve plate 20 to rotate, so that the valve plate 20 is inclined or vertically located in the vertical pipe 10, meanwhile, the phenomenon that pressure is suppressed when the pressure in the stand pipe 10 is larger than the pressure of the turnover valve plate 20 is avoided.

In this embodiment, a gap may be formed between the outer edge of the valve plate 20 and the inner wall of the vertical pipe 10, so that when the rotating handwheel 30 is rotated to drive the valve plate 20 to rotate, the problem of difficulty in rotation caused by the gap between the valve plate 20 and the inner wall of the vertical pipe 10 is avoided, and the operation strength of an operator is reduced.

The oil well sampling pressure-holding prevention device provided by the embodiment is used and specifically operated as follows: when on-site sampling is needed to be carried out for testing an oil sample with a required volume, the rotary hand wheel 30 is rotated to drive the valve plate 20 to rotate in the vertical pipe 10, the opening degree of the valve plate 20 in the vertical pipe 10 is controlled according to the oil output, and when the height of oil stored in the sampling anti-blocking device is close to the sampling port 11 in the vertical pipe 10 or higher than the sampling port 11, the oil enters the sampling port 11 and flows out of the sampling port 11, so that sampling and collection of the oil are realized.

The oil well sampling pressure-holding prevention device provided by the embodiment is arranged in a vertical pipe 10 and below a sampling port 11 on the vertical pipe 10, and can comprise a valve plate 20 and a rotary hand wheel 30, wherein the valve plate 20 is arranged in the vertical pipe 10, the rotary hand wheel 30 is arranged outside the vertical pipe 10 and connected with the valve plate 20, and the rotary hand wheel 30 is used for driving the valve plate 20 to rotate so as to enable a gap between the outer edge of the valve plate 20 and the inner wall of the vertical pipe 10 to be adjustable, so that the oil liquid is rapidly collected by controlling the opening degree of the valve plate 20 during sampling, thereby avoiding the problem that when a low-yield well is sampled, in order to obtain an oil sample meeting the volume required by an assay, the sampling needs to be waited for a long time and a large amount of oil well gas is leaked out, and meanwhile, when the oil well contains free water, because the viscosity of water is small, the fluidity is good, the viscosity of crude oil is, crude oil flows along the pipe wall, relative speed is slower, so that the error of the obtained oil sample is larger, through set up valve plate 20 in riser 10, can guarantee when the water velocity is too fast, play the effect of stopping the water flow, and then the velocity of flow of control water, the great problem of the oil sample data difference of having avoided acquireing, therefore, the oil well sample anti-suppression device that this embodiment provided, save time when having realized the sample, the effect that raises the efficiency and factor of safety are high, the accuracy of having guaranteed the oil well sample and the true production developments of having reflected the oil well, the sample difficulty that exists when having solved prior art oil well sample, it is long consuming time, the problem of high risk.

On the basis of the above embodiment, referring to fig. 2a, in this embodiment, the valve plate 20 may include a main valve plate 21 and a flip valve plate 22 rotatably connected to the main valve plate 21, the rotary hand wheel 30 is connected to the main valve plate 21, and when the pressure in the stand pipe 10 is greater than the flip pressure of the flip valve plate 22, the flip valve plate 22 rotates to form a pressure relief port between the flip valve plate 22 and the inner wall of the stand pipe 10.

In this embodiment, the main valve plate 21 and the flip valve plate 22 are both disposed in the vertical pipe 10, the main valve plate 21 is rotatably connected to the flip valve plate 22, and the rotary hand wheel 30 is connected to the main valve plate 21, so that when sampling oil in an oil well, when the rotary hand wheel 30 is rotated, the main valve plate 21 and the flip valve plate 22 are driven to rotate in the vertical pipe 10, when the main valve plate 21 and the flip valve plate 22 are horizontally located in the vertical pipe 10, the oil flows in the vertical pipe 10 and is stored on the main valve plate 21 and the flip valve plate 22, when the pressure in the vertical pipe 10 is greater than the flip pressure of the flip valve plate 22, the flip valve plate 22 rotates in the vertical pipe 10, at this time, a pressure relief port is formed between the flip valve plate 22 and the inner wall of the vertical pipe 10, and the oil continues to flow in the original direction in the vertical pipe 10 under the action of inertia through the pressure relief port, so as to avoid, the safety of the oil well pipeline is ensured.

The oil well sampling pressure-holding prevention device provided by the embodiment is used and specifically operated as follows: when on-site sampling is needed to be carried out for testing an oil sample with a required volume, the main valve plate 21 and the turnover valve plate 22 are driven to rotate by rotating the rotary hand wheel 30, so that when the pressure in the vertical pipe 10 is smaller than or equal to the turnover pressure of the turnover valve plate 22, the main valve plate 21 and the turnover valve plate 22 are maintained in a horizontal state, at this time, under the blocking action of the main valve plate 21 and the turnover valve plate 22, the oil changes the flow direction and is discharged through the sampling port 11, so that sampling and collection of the oil are realized, when the pressure in the vertical pipe 10 is larger than the turnover pressure of the turnover valve plate 22, a pressure relief port is formed between the turnover valve plate 22 and the inner wall of the vertical pipe 10, and at this time, the oil continues to maintain the original flow direction through the pressure relief port, namely, as shown in fig. 5.

The oil well sampling pressure-holding prevention device provided by the embodiment comprises a main valve plate 21 and an overturning valve plate 22 which is rotationally connected with the main valve plate 21 through a valve plate 20, wherein a rotary hand wheel 30 is connected with the main valve plate 21, and when the pressure in a vertical pipe 10 is greater than the overturning pressure of the overturning valve plate 22, the overturning valve plate 22 rotates to enable a pressure relief opening to be formed between the overturning valve plate 22 and the inner wall of the vertical pipe 10, so that the problem that the pressure is greater than the overturning pressure when the pressure in the vertical pipe 10 is greater than the pressure during sampling is avoided, therefore, the oil well sampling pressure-holding prevention device provided by the embodiment realizes the pressure-holding prevention function on the basis of the embodiment and ensures the effect of pipeline safety.

On the basis of the above-described embodiment, referring to fig. 2a and 2b, the main valve plate 21 and the rollover valve plate 22 constitute a circular structure or an elliptical structure, and the area of the main valve plate 21 is larger than that of the rollover valve plate 22.

In this embodiment, the main valve plate 21 and the flip valve plate 22 may be set to be circular structures, elliptical structures, or triangular, rectangular, polygonal, or the like, and the setting requirements of the oil well sampling device should be specifically determined.

In this embodiment, the main valve plate 21 and the flip valve plate 22 form a circular structure or an elliptical structure, which not only can ensure that the oil and the valve plate 20 have a good sealing relationship and a good sliding relationship, but also can ensure that the area of the cross section of the circular structure or the elliptical structure is the largest, i.e., the above arrangement mode can provide the largest oil circulation and storage effect.

In this embodiment, the area of main valve plate 21 can be greater than the area of upset valve plate 22, like this when the sample, when pressure in riser 10 is greater than the upset pressure of upset valve plate 22, upset valve plate 22 begins to rotate under the effect of upset pressure, can guarantee like this that most fluid still can continue to be stored on main valve plate 21, little part fluid passes through the pressure release and maintains its original flow direction under inertial effect, like this when the sample, can get the oil well production liquid sample fast, save the time of operation personnel sample.

On the basis of the above embodiment, as shown in fig. 2a, the main valve plate 21 and the flap valve plate 22 are rotatably connected through the flap shaft 23, the flap shaft 23 is sleeved with the flap spring 24, one end of the flap spring 24 abuts against the flap valve plate 22, and the other end of the flap spring 24 abuts against the main valve plate 21.

In this embodiment, the turning spring 24 may be sleeved on the turning shaft 23, one or more turning springs 24 may be installed, and in this embodiment, the number of the turning springs 24 is not limited, and may be specifically determined according to the setting requirements of the oil well sampling device.

In this embodiment, both ends of the flip spring 24 may be fixed by punching holes in the main valve plate 21 and the flip valve plate 22, or may be abutted against the main valve plate 21 and the flip valve plate 22, and in this embodiment, the description will be specifically given by taking an example in which both ends of the flip spring 24 are abutted against the main valve plate 21 and the flip valve plate 22, respectively.

The oil well sampling pressure-holding prevention device provided by the embodiment is used and specifically operated as follows: referring to fig. 5, when on-site sampling is required to be performed to assay an oil sample with a required volume, the main valve plate 21 is driven to rotate by rotating the rotary hand wheel 30, the main valve plate 21 drives the turning shaft 23 and the turning spring 24 to rotate, and the turning valve plate 22 is turned under the action of the turning shaft 23 and the turning spring 24, that is, in the embodiment, the turning valve plate 22 can play a role in blocking oil under the support of the turning shaft 23 and the turning spring 24, and the turning valve plate 22 rotates when the pressure of the vertical pipe 10 is greater than the turning pressure to form a pressure relief opening between the turning valve plate 22 and the inner wall of the vertical pipe 10, in addition, the turning shaft 23 is arranged on the main valve plate 21 under the condition that the turning valve plate 22 cannot be turned, so that the turning effect can be further ensured when the pressure of the vertical pipe 10 is greater than the.

The oil well sample pressure-resistant device that holds back that this embodiment provided, it links to each other to rotate through trip shaft 23 between main valve plate 21 and the upset valve plate 22, and trip shaft 23 goes up the cover and establishes upset spring 24, the one end of upset spring 24 supports on upset valve plate 22, the other end of upset spring 24 supports on main valve plate 21, like this when taking a sample, it rotates to have guaranteed that upset valve plate 22 rotates when riser 10 pressure is greater than upset pressure, set up trip shaft 23 on main valve plate 21 on setting up upset valve plate 22's basis simultaneously, like this when taking a sample, further guarantee the safety of oil well pipeline, the pressure-resistant cracked problem of pipeline that causes has appeared holding back in the riser 10.

On the basis of the above embodiment, the valve further includes a valve central shaft 25, as shown in fig. 1 to fig. 3, the valve central shaft 25 transversely penetrates through the vertical pipe 10 and is arranged to rotate in a sealing manner with the vertical pipe 10, one end of the valve central shaft 25 is connected to the rotating hand wheel 30, and a portion of the valve central shaft 25 located in the vertical pipe 10 is connected to the main valve plate 21.

In this embodiment, the valve center shaft 25 can transversely wear to establish in riser 10 one side, the valve center shaft 25 also can wear to establish in riser 10 both sides respectively, in this embodiment, when the valve center shaft 25 transversely wears to establish in riser 10 one side, sealed rotation sets up between valve center shaft 25 and the riser 10, and the one end of valve center shaft 25 links to each other with rotatory hand wheel 30, the part that the valve center shaft 25 is located in the riser 10 links to each other with main valve plate 21, when rotating rotatory hand wheel 30, valve center shaft 25 rotates with rotatory hand wheel 30 simultaneously, and drive main valve plate 21 and rotate, when the valve center shaft 25 wears to establish in riser 10 both sides respectively, sealed rotation sets up between the other end of valve center shaft 25 and the riser 10 opposite side.

In this embodiment, the valve central shaft 25 and the vertical pipe 10 are rotatably sealed, so that oil is prevented from leaking from a gap at the joint between the valve central shaft 25 and the vertical pipe 10, and the reliability of the device is improved.

On the basis of the above embodiment, the outer peripheries of both ends of the valve central shaft 25 are provided with the external threads 26, the riser 10 is provided with the opening through which the valve central shaft 25 can pass, and the external threads 26 are in threaded connection with the seal nut 27, so that the valve central shaft 25 is rotatably arranged on the riser 10.

In this embodiment, the sidewall of the vertical pipe 10 may be provided with an opening through which the valve central shaft 25 can pass, and specifically, may be provided with a circular hole corresponding to the size of the valve central shaft 25.

In this embodiment, two ends of the valve center shaft 25 may be welded to two sides of the vertical pipe 10, or may be connected to the vertical pipe 10 by providing external threads 26 on the peripheries of the two ends of the valve center shaft 25, and in this embodiment, the external threads 26 are specifically provided on the peripheries of the two ends of the valve center shaft 25.

In this embodiment, the both ends periphery of valve center pin 25 all is equipped with external screw thread 26, specifically can set up in the junction with riser 10, and external screw thread 26 and seal nut 27 threaded connection on the both ends periphery are convenient for realize the dismouting between valve center pin 25 and riser 10 and the rotatory hand wheel 30 after the sample is ended through threaded connection like this.

On the basis of the above embodiment, at least two sealing rings 28 may be further included, as shown in fig. 1 to fig. 3, the at least two sealing rings 28 are respectively sleeved at two ends of the valve central shaft 25, and the sealing rings 28 are located between the sealing nut 27 and the outer wall of the riser 10, so as to seal between the valve central shaft 25 and the riser 10.

In this embodiment, one sealing ring 28 may be sleeved on the valve central shaft 25, or a plurality of sealing rings 28 may be sleeved on the valve central shaft, and the number of the sealing rings 28 is not limited in this embodiment.

In this embodiment, at least two sealing rings 28 may be sleeved on one end of the valve central shaft 25, or may be sleeved on both ends of the valve central shaft 25, so as to further improve the stability of the device.

The oil well sampling pressure-holding prevention device provided by the embodiment is used and specifically operated as follows: at least two sealing rings 28 are respectively sleeved at two ends of a valve central shaft 25 and clamped into the side wall of the vertical pipe 10, a round hole with a corresponding size is formed in the side wall of the vertical pipe 10, an external thread 26 is formed at the joint of the valve central shaft 25 and the vertical pipe 10, a sealing nut 27 is screwed in, and the sealing rings 28 are squeezed to realize the sealing of the vertical pipe 10 and the valve central shaft 25.

The oil well sampling pressure-holding prevention device that this embodiment provided, through including two at least sealing washers 28, two at least sealing washers 28 overlap respectively and establish the both ends at valve center pin 25, and sealing washer 28 is located between the outer wall of gland nut 27 and riser 10, so that seal between valve center pin 25 and the riser 10, like this when taking a sample, through with sealed the setting between valve center pin 25 and the riser 10, can avoid the fluid in the riser 10 to leak from the gap of threaded connection department, the stability and the reliability of oil well sampling device have been improved, and simultaneously, threaded connection also is convenient for the dismouting between valve center pin 25 and the riser 10.

On the basis of the above embodiment, the turnover spring 24 is a torsion spring, and in this embodiment, the installation number of the torsion springs is not limited, and is specifically determined according to the setting requirements of the oil well sampling device.

Example two

Fig. 4 is the structural schematic diagram of an oil well sampling system that embodiment two provided of the utility model provides, fig. 5 is the utility model discloses another kind of oil well sampling system's that embodiment two provided structural schematic diagram, fig. 6 is the utility model provides a structural schematic diagram of the nut.

On the basis of the above embodiments, the present embodiment further provides an oil well sampling system 70, as shown in fig. 4 and 5, in the present embodiment, the oil well sampling system includes a riser 10, a sampling tube 40, a sample storage container 50, and any one of the above oil well sampling pressure-holding prevention devices, one end of the sampling tube 40 is connected to a sampling port 11 formed on the riser 10, the other end of the sampling tube 40 extends to the sample storage container 50, the sampling tube 40 is provided with a control valve 60, the oil well sampling pressure-holding prevention device is disposed in the riser 10, and the oil well sampling pressure-holding prevention device is located below the sampling port 11.

When the oil well sampling system 70 provided by the embodiment is used, the specific operations are as follows: when on-site sampling is required to be carried out for testing an oil sample with a required volume, firstly, at least two sealing rings 28 are respectively sleeved at two ends of a valve central shaft 25 and clamped into the side wall of a stand pipe 10, a circular hole with a corresponding size is formed in the side wall of the stand pipe 10, an external thread 26 is formed at the joint of the valve central shaft 25 and the stand pipe 10, a sealing nut 27 is screwed in and extrudes the sealing rings 28 to realize the sealing of the stand pipe 10 and the valve central shaft 25, a main valve plate 21 is driven to rotate by rotating a rotating hand wheel 30, and a turnover valve plate 22 rotates under the action of a turnover shaft 23 and a turnover spring 24, so that when the pressure in the stand pipe 10 is less than or equal to the turnover pressure of the turnover valve plate 22, the turnover valve plate 22 and the main valve plate 21 are kept in a horizontal state, at the moment, the oil in the stand pipe, the other end of the sampling tube 40 extends to the sample storage container 50, and the sampling tube 40 is provided with a control valve 60, at this time, the control valve 60 on the sampling tube 40 is opened, so that the oil liquid in the vertical tube 10 passes through the sampling tube 40 and is discharged from the sampling port 11, and flows into the sample storage container 50, so as to realize the sampling and collection of the oil liquid, when the pressure in the vertical tube 10 is greater than the overturning pressure of the overturning valve plate 22, the overturning valve plate 22 starts to rotate in the vertical tube 10, and at this time, the oil liquid in the vertical tube 10 maintains the original flowing direction under the action of inertia.

The oil well sampling system 70 provided by this embodiment comprises a riser 10, a sampling tube 40, a sample storage container 50 and any one of the above-mentioned oil well sampling choke preventing devices, wherein one end of the sampling tube 40 is connected with a sampling port 11 formed on the riser 10, the other end of the sampling tube 40 extends to the sample storage container 50, and the sampling tube 40 is provided with a control valve 60, the oil well sampling anti-choke device is arranged in the vertical tube 10, and the oil well sampling anti-choke device is positioned below the sampling port 11, so that when sampling, the oil well sampling pressure-holding prevention device can be added on the basis of the existence of the control valve 60, so that the oil sample meeting the test requirement can be quickly obtained when the low-yield well is sampled, therefore, the oil well sampling anti-choke device provided by the embodiment achieves the effects of quickly taking oil well produced liquid samples, reducing the operating strength of workers and increasing the site safety.

On the basis of above-mentioned embodiment, the oil well sample pressure-resistant device that suppresses is located the below of sample connection 11 and is close to sample connection 11, through preventing suppressing the pressure-resistant device setting with the oil well sample in the below of sample connection 11, like this when the oil in riser 10 is stored the oil well sample and prevents suppressing the pressure-resistant device on, the oil well sample pressure-resistant device that suppresses can realize the effect of blockking up to oil, prevent suppressing the pressure-resistant device setting of oil well sample in the below of sample connection 11 and be close to sample connection 11, avoided like this when too far away from sample connection 11 can't realize getting the problem of oil fast, therefore, the oil well sample pressure-resistant device that suppresses that this embodiment provided, the effect of getting oil fast has been realized, the prior art sampling difficulty has been solved, it is long consuming time, the problem that the risk is high.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides an oil well sample pressure-holding prevention device, sets up in the riser and is located the below of the sample connection on the riser, its characterized in that includes:

the valve plate is located in the vertical pipe, the rotary hand wheel is located outside the vertical pipe and connected with the valve plate, and the rotary hand wheel is used for driving the valve plate to rotate so that the outer edge of the valve plate and a gap between the inner walls of the vertical pipe can be adjusted.

2. The oil well sampling pressure-holding prevention device as claimed in claim 1, wherein the valve plate comprises a main valve plate and an overturning valve plate rotationally connected with the main valve plate, the rotary hand wheel is connected with the main valve plate, and when the pressure in the riser is greater than the overturning pressure of the overturning valve plate, the overturning valve plate rotates to form a pressure relief opening between the overturning valve plate and the inner wall of the riser.

3. The oil well sampling pressure build-up prevention device of claim 2, wherein the main valve plate and the turnover valve plate form a circular structure or an elliptical structure, and the area of the main valve plate is larger than that of the turnover valve plate.

4. The oil well sampling pressure-holding prevention device as claimed in claim 2, wherein the main valve plate is rotatably connected with the turnover valve plate through a turnover shaft, the turnover shaft is sleeved with a turnover spring, one end of the turnover spring abuts against the turnover valve plate, and the other end of the turnover spring abuts against the main valve plate.

5. The oil well sampling pressure build-up prevention device according to any one of claims 2 to 4, further comprising: the valve center shaft transversely wears to establish on the riser and with sealed rotation sets up between the riser, just the one end of valve center shaft with rotatory hand wheel links to each other, the valve center shaft is located part in the riser with main valve plate links to each other.

6. The oil well sampling pressure build-up prevention device as claimed in claim 5, wherein the valve center shaft is provided with external threads on the outer peripheries of both ends, and the riser is provided with an opening through which the valve center shaft can pass;

the external thread is in threaded connection with the sealing nut, so that the valve central shaft is rotatably arranged on the vertical pipe.

7. The oil well sampling pressure build-up prevention device of claim 6, further comprising:

the sealing rings are respectively sleeved at two ends of the valve central shaft and are positioned between the sealing nut and the outer wall of the vertical pipe, so that the valve central shaft and the vertical pipe are sealed.

8. The oil well sampling anti-choke device of claim 4, wherein the flip spring is a torsion spring.

9. An oil well sampling system, comprising: the oil well sampling pressure-holding prevention device comprises a vertical pipe, a sampling pipe, a sample storage container and the oil well sampling pressure-holding prevention device as claimed in any one of the claims 1 to 8, wherein one end of the sampling pipe is connected with a sampling opening formed in the vertical pipe, the other end of the sampling pipe extends to the sample storage container, a control valve is arranged on the sampling pipe, the oil well sampling pressure-holding prevention device is arranged in the vertical pipe, and the oil well sampling pressure-holding prevention device is positioned below the sampling opening.

10. An oil well sampling system according to claim 9 wherein said oil well sampling choke prevention device is located below and adjacent to said sampling port.

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