Device for liquid probe taking from well

FIELD: oil and gas industry, particularly to take samples from different well depths.

SUBSTANCE: device comprises cylindrical body and rod with diaphragms which may slide with respect to the body. The body is composed of stacked cylinders sliding along the body in axial direction and having channels with valves. Upper body part is provided with low-pressure chamber having technological rod with annular recesses converging downwards and formed in outer surface thereof. Outer surface body has annular grooves. The rod is rigidly installed in the body in air-tight manner and is sealed from below. Diaphragms are made as annular pistons installed in lower part of each body cylinder. Cavity located under each cylinder may communicate with well interior through channels provided with valves. Cavity located over piston may communicate with low-pressure chamber through rod. Hydraulic chamber with end part enclosing the body is located over the body. The hydraulic chamber has partition arranged over the body and enclosing technological rod. Upper part of hydraulic chamber is hermetically connected with pipe string and is provided with piston pressed from below by means of spring and enclosing technological rod in air-tight manner. The piston is provided with annular groove converging in upward direction. The annular groove has retaining ring, which may cooperate with annular depressions of technological rod. End part of hydraulic chamber seals channels formed in body cylinders and is provided with recess created in inner side thereof and having spring ring. The ring may cooperate with annular grooves of the body.

EFFECT: increased reliability and sample separation quality.

1 dwg

 

The invention relates to hydro-geological and field studies of wells, namely the technique of sampling fluids from wells of different depth levels.

Famous sampler (inventor's certificate SU # 924362, IPC 7 E 21 In 49/08, publ. B # 16 30.04.1982 year), including a casing, a receiving chamber, a spring-loaded upper and lower valves airtight working chamber, while it is equipped with two pistons are rigidly connected by rods with the valves and installed in the working chamber filled with gas under atmospheric pressure, and the receiving chamber is filled with compressed gas, and the lower piston has a channel for communication of the working chamber with the external environment when the upper position of the piston and the stroke limiter piston is made in the form of a sleeve, fixed shear pin on the stock.

The disadvantages of this device are:

first, the design complexity, due to the presence of a large number of nodes and technically complex parts;

secondly, such a structural element as the check is cut only at a certain pressure that must be achieved, otherwise the sampler does not work, and it significantly reduces the reliability of its work;

thirdly, a large number of technologically complex parts that require high precision manufacturing, leads to an appreciation of design is in General.

Famous sampler (inventor's certificate SU # 1461899, IPC 7 E 21 In 49/08, publ. BI No. 8 of 28.02.1989,), comprising a housing with suspension and a suction chamber with a valve, a valve with an emphasis in contact with the borehole wall, and the rod with the guide, a spring-loaded relative to the housing and communicating with the valve inlet chamber. The sampler is equipped with ball lock, made in the form of spring-loaded relative to the housing stepped sleeve inside of the cage with balls, rigidly fixed to the upper part of the body and to the suspension, and the emphasis is made of elastic material in the form of a hollow cone facing downwards and that the latter is fixed on the upper part of the stepped sleeve, with hollow cone made with the possibility of contact of its outer surface with the walls of the hole and turning the inner surface of the outside, and the rod is placed inside the separator and is installed with the possibility of fixation relative to the housing in the lower position when the contact balls of the separator with the guide rod and the inner surface small diameter stepped sleeve.

The disadvantages of this device are:

first, the design complexity, due to the large number of components and parts;

secondly, at high alternating loads, the spring elements which may be damaged, due to the reduced reliability of the sampler as a whole;

thirdly, the Assembly may only be carried out at a qualified specialist workshop, which causes additional costs.

The closest in technical essence and the achieved result to the present invention is a device for sampling fluid from a well (inventor's certificate SU # 1698432, IPC 7 E 21 In 49/08, publ. BI No. 46 from 15.12.1991 year), including suspended on a cable suspension rod with upper and lower diaphragms, made in the form of tubes, a circular-shaped housing mounted on the outer side of the diaphragm with the possibility of longitudinal movement when interacting with messenger cargo, it is provided with additional apertures mounted on the rod between the upper and lower diaphragms, and additional messengers goods, and the housing is spring-loaded relative to the stem, with additional diaphragm mounted on the rod for movement and relative to the last commit.

The disadvantages of the design are:

- firstly, the need to constantly monitor the stiffness of the spring, the strength characteristics which change over time, moreover, the weight of the cargo that is discharged from the wellhead to the device by a cable suspension, depends on the density of the well fluid, which is not under the W control in the sampling process; in addition, the ongoing operation sampling occur uncontrollably. Due to the above factors decreases the reliability of the device as a whole;

- secondly, if at least one of the seals additional aperture is not sealed, the samples are mixed, thereby reducing the quality of the samples.

An object of the invention is to increase the reliability of the device regardless of external factors and control of operations, as well as improving the quality of separation of samples taken.

The technical problem is solved by the proposed device for sampling fluid from a well comprising a body of cylindrical shape, stem with diaphragms made with the possibility of axial movement relative to the housing, and spring.

What's new is that the body is made in the form of sequentially installed one above the other cylinders, which are equipped with bottom channels with valves, and is fitted on top of the low-pressure chamber with the technological stock, on the outer surface of which is made tapering down ring sample, and on the outer surface of the case is made of annular grooves, the rod is installed tightly and rigidly in the housing and is made hollow and muffled from the bottom, and the aperture is made in the form of an annular piston, fitted is the R at the bottom of each cylinder housing, this podpornega cavity of each cylinder through the channel with valve made with the possibility of communication with the interior space of the well, and nadporshnevaya cavity through the stem with low-pressure chamber, and the top of the body has a hydraulic chamber with the shank covering the housing, and a partition located above the housing and covering the technological stock, with the hydraulic chamber from the top tightly connected with the column pipe and provided between its bottom spring piston hermetically covering technological stem and is equipped inside tapering upward circular groove, which is equipped with a retaining ring made with the possibility of interaction with the ring samples technological stem and shank hydraulic the camera has a capability sealed overlapping channels cylinder housing and is fitted on the inner surface of the sample with a spring ring, which is arranged to communicate with the annular grooves of the housing.

The drawing shows the proposed device for sampling fluid from a well in longitudinal section.

Device for sampling fluid from a well includes a casing 1 of cylindrical shape, the rod 2 with membrane 3 made with the possibility of axial movement relative to building the sa 1.

The housing 1 is made in the form of series installed one above the other cylinder 4, which is equipped with bottom channels with 5 valves 6. The housing 1 is additionally equipped with top of the low-pressure chamber 7 with the technological stem 8, on the outer surface of which is made tapering to the bottom ring of the sample 9. On the outer surface of the housing 1 is made of an annular groove 10. The rod 2 is tightly and rigidly in the housing 1 and is made hollow and muffled from the bottom. The diaphragm 3 is made in the form of an annular piston 11 mounted at the bottom of each cylinder 4 of the housing 1.

Podpornega cavity 12 of each cylinder 4 through the channel 5 with the valve 6 is made with the possibility of communication with the interior space of the borehole (not shown). Nadporshnevaya cavity 13 through the rod 2 with the low - pressure chamber 7. On top of the casing 1 is installed hydraulic chamber 14 with the shank 15 covering the housing 1 and the partition wall 16 above the housing 1 and covering technological stem 8.

The hydraulic chamber 14 from the top tightly connected with the column pipe 17 and is provided between its upward by the spring 18 and the piston 19, hermetically covering technological stem 8. The piston 19 is fitted from the inside tapering upward circular groove 20. Annular groove 20 of the piston 19 is fitted retaining ring 21 made with the possibility entries batch shall I ring samples 9 technological stem 8.

The shank 15 of the hydraulic chamber 14 is configured to tight overlapping channels 5 cylinders 4 of the housing 1 and is fitted on the inner surface of the sample 22, equipped with a spring ring 23. Snap ring 23 is arranged to communicate with the annular grooves 10 of the housing 1.

Unauthorized overflows of liquid on the mating surfaces of the device are excluded sealing rings 24, 25, 26, 27, 28.

Device for sampling fluid from a well is as follows.

For example, in a device for sampling fluid from a well with three chambers: the lower, middle and upper, each of which is formed during the operation of the device and corresponds to the amount of space between the nearest orifice 3 of the rod 2 inside the housing 1.

At the wellhead (not shown) the device is installed in the original position, that is, the retaining ring 21 located in the annular groove 20 of the piston 19, is placed at the bottom tapering to the bottom of the ring sample 9 technological stem 8. Then the device on the string of pipe 17 is lowered into the well.

In the process of lowering the device into the well in the well fluid freely flows upward through the space between the inner walls of the borehole (not shown) and the device. If n is needed, you can remove the device from the well after the descent without sampling the liquid.

Sampling fluid from a well can be carried out both top-down and bottom-up. Consider the case of sampling fluid from a well with a different depth levels from top to bottom.

The descent device suspend in the top interval of sampling, but the device must be immersed under the liquid level in the well (not shown) by at least 10 meters in order to secure the valve 6 for access of fluid through the channel 5 in podporchennuyu cavity 12 of the cylinder 4.

Next, fill the string of pipe 17 process fluid, after which the wellhead by means of a pump unit (figure not shown) is created in the string of pipe 17 hydraulic pressure. The hydraulic pressure acts on the piston 19 from above, causing compression of the spring 18 to move down the piston 19 in conjunction with retaining ring 21 and technological stem 8 and the housing 1, which is at the top is rigidly connected with technological stem 8. In the beginning of the movement of the spring ring 23 located in the sample 22 of the shank 15 and the retainer housing 1 in its annular groove 10, due to the effect of hydraulic pressure on the piston 19, causing the movement of the body 1, is dispersed in and out of the annular groove 10 of the housing 1. The movement of the piston 19 continues until until he dostine the bottom of the stop 29 of the hydraulic chamber 14, this snap ring 23 located in the sample 22 of the shank 15 will lock the housing 1 in upstream relative to the previous annular groove 10 of the housing 1.

Portavadie in the process of moving the piston 19 is excluded technological hole 30 made in the shank 15 above the partition 16.

The increasing pressure on the weight indicator that is installed on the wellhead, indicates that the piston 19 is abutted against the lower stop 29 hydraulic chamber 14.

Due to the pressure drop ΔP inside and outside of the upper cylinder 4 valve 6 is opened and located in the well the liquid sample through the channel 5 starts to arrive in podporchennuyu cavity 12 of the lower cylinder 4 with a given interval sampling.

Upon receipt of the fluid sample inside the top of the cylinder 4, aperture 3, made in the form of the piston 11 rises through the message newportnews cavity 13 of the cylinder 4 through the through holes 31 of the rod 2 with the low-pressure chamber 7.

The flow of fluid into podporchennuyu cavity 12 of the upper cylinder 4 will end when the piston 11 reaches the upper end of the cylinder and is sealed by o-rings 24 and 26, block the through hole 31 of the rod 2, the valve 6 of the upper cylinder 4 is closed. Practical experience is enough for 1-2 minutes to fill the cylinder 4, and the g is ubje below the liquid level in the well is the device, the greater the pressure drop ΔP and the less time required to fill the cylinder 4.

The pressure in the string of pipe 17 above the piston 19 are dropping, resulting in under the action of the return force of the spring 18 and the piston 19 is returned, with the retaining ring 21 located in the annular groove 20 of the piston 19 and the locking piston is at the bottom, tapering to the bottom of the ring sample 9 technological stem 8, comes out of it, moving together with the piston 19 up until the retaining ring 21 is fixed in the next overlying the annular sample 9 technological rod 8, while the technological stem 8, and therefore the housing 1, is fixed by fixing spring ring 23 located in the sample 22 of the shaft 15 relative to the annular groove 10 of the housing 1. For sampling fluid with the following underlying intervals of the well, the device will dopuskayut down to given intervals by increasing the pipe string 17.

The sequence and the technology of filling in the middle and upper chambers of the device is similar to the filling of the lower chamber, and the liquid sample from the middle and lower chambers do not fall into the upper chamber and not mixed together, due to the air tight separation of the chambers by means of sealing elements 24, 25, 26.

The proposed device for OTB is RA fluid sample from the well has a high reliability, because it is not dependent on external factors, and the sampling process is controlled from the wellhead, in addition, the chamber formed adjacent apertures, which are selected downhole fluid from different depths of the well, hermetically separated from each other, which allows to improve the quality of separation of samples taken.

Device for sampling fluid from a well comprising a body of cylindrical shape, stem with diaphragms made with the possibility of axial movement relative to the housing, and a spring, wherein the body is made in the form of sequentially installed one above the other cylinders, which are equipped with bottom channels with valves, and is fitted on top of the low-pressure chamber with the technological stock, on the outer surface of which is made tapering down ring sample, and on the outer surface of the case is made of annular grooves, the rod is installed tightly and rigidly in the housing and is made hollow and muffled from the bottom, and the aperture is made in the form of an annular piston mounted at the bottom of each cylinder housing, with podpornega cavity of each cylinder through the channel with valve made with the possibility of communication with the interior space of the well, and nadporshnevaya cavity through the stem with the camera low pressure is Oia, and on top of the casing is installed hydraulic chamber with the shank covering the housing, and a partition located above the housing and covering the technological stock, with the hydraulic chamber from the top tightly connected with the column pipe and provided between its bottom spring piston hermetically covering technological stem and is equipped inside tapering upward circular groove, which is equipped with a retaining ring made with the possibility of interaction with the ring samples technological stem and shank hydraulic chamber configured to tight overlapping channels cylinder housing and is fitted on the inner surface of the sample with a spring ring, which is arranged to communicate with the annular grooves of the housing.



 

Same patents:

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FIELD: hydro-geological well research.

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2 cl, 2 dwg

FIELD: hydro-geological well research, namely, equipment for taking liquid samples from well levels of different depth.

SUBSTANCE: device includes cable suspension, rod with diaphragms made with possible axial movement relatively to rod, cylindrically shaped body. Body is made in form of cylinders mounted one above another, each one of which is equipped from below with channels having valves. From above body is equipped with low pressure chamber, by means of which it is connected to cable suspension. From below body is equipped with hollow tail with technological groove on external surface, and on outside it is provided with bushing having spring localizers and a pin below. Pin interacts with technological groove. Bushing is made with possible hermetic closure of body cylinder channels. Rod is mounted hermetically and rigidly in the body and is made hollow and is muffled from below. Diaphragms are made in form of circular pistons mounted below each cylinder of body. Sub-piston hollow of each cylinder through channel with valve is connected to internal well space, above-piston area is connected to low pressure chamber via through apertures of rod. Technological groove is made in form of longitudinal recesses gradually extended downwards, connected by profiled groove. During reciprocal movement of bushing relatively to body pin moves successively to longer and longer longitudinal recesses, while successively opening channels of cylinder in downward order one by one.

EFFECT: increased reliability and quality of separation of samples.

2 dwg

FIELD: mining, particularly oil and gas well testing.

SUBSTANCE: method involves lowering sample taking device suspended to wire or logging cable to take two or more deep fluid, gas or fluid and gas mixture samples in air-tight manner simultaneously, wherein the sample taking device comprises at least two sample taking chambers; communicating well space with sample taking chamber interiors by closing or opening the chambers with the use of hydraulic drive, which is actuated since sample taking sample taking device was lowered in well, wherein lowering, lifting operations, as well as operation for sample taking device retaining at sampling point are carried out along with measurement of pressure, temperature and sample taking device location depth. The sample taking chambers are opened or closed synchronously or alternatively. Hydraulic drive is operated by electromagnetic valve under control of electronic programmable controller, which controls valve opening and closing in accordance with preset time period or well pressure value. In the case of cable communication line usage the valve is controlled by control signal given from land-based unit. Sample taking device comprises electronic module, hydraulic drive assembly, one or several sample taking chambers, temperature and pressure sensors and programmable controller, which operates electromagnetic valve of hydraulic drive assembly, magnetic collar locator, natural radioactivity recording unit. All information fixed by sensors is digitized and stored in nonvolatile memory means. Sample taking device also has sensor system, which detects sample taking chamber valves opening and closing independently for each sample taking chamber. All measured parameters are digitized and stored in electronic module memory or is supplied to land surface in the case of cable communication line usage.

EFFECT: possibility to take sealed samples simultaneously in one well point or in several points located at different depths, possibility to perform continuous depth, temperature and pressure measurements inside the well in sampling point and along well bore, provision of independent control of each sample taking chamber.

9 cl, 3 dwg

Sampler // 2278260

FIELD: hydrogeological well survey, particularly to take subsurface well fluid samples.

SUBSTANCE: sampler comprises sealed chamber, lower check valve with seat and control mechanism. The sealed chamber is provided with process groove extending along outer surface thereof and with orifices arranged below the groove. Check valve is spring-loaded in downward direction and is made as two cylinders connected one to another by conical part. Cylinder having greater diameter is located from above and provided with annular groove extending along outer surface thereof. Cylinder having lesser diameter is provided with stop located from cylinder bottom. The seat may cooperate with cylinder having greater diameter. Seat diameter is less than inner diameter of sealed chamber and has axial length less than that of cylinder with lesser diameter. Control mechanism includes balls, cylindrical rest and bush arranged over the cylindrical rest. The cylindrical rest has cylindrical cut formed on inner surface in upper part thereof and may perform axial movement relatively sealed chamber. The bush comprises spring centralizers and finger cooperating with process groove. The balls are installed in sealing chamber orifices and may cooperate with annular groove from inner surface and with cylindrical rest from outer surface thereof. The cylindrical rest in its working position may cooperate with bush. Cylindrical cut may be opposite to sealed chamber orifices. The process groove is made as axial short and long cuts connected one to another so that as bush moves in axial direction finger is displaced towards long axial cut.

EFFECT: increased simplicity and operational reliability, reduced costs.

2 cl, 2 dwg

Sampler // 2278259

FIELD: hydrogeological well survey, particularly to take subsurface well fluid samples.

SUBSTANCE: sampler comprises receiving chamber with piston, lower check valve with seat and control mechanism. The piston is provided with weight connected to piston top and having docking unit and with annular groove formed in lower part of outer piston surface. The receiving chamber is provided with process groove extending along outer surface thereof and with orifices arranged below the groove. Control mechanism includes balls, cylindrical rest and bush arranged over the cylindrical rest. The cylindrical rest has cylindrical cut formed on inner surface in upper part thereof and may perform axial movement relatively sealed chamber. The bush comprises spring centralizers and finger cooperating with process groove. The balls are installed in chamber orifices and may cooperate with annular groove from inner surfaces and with cylindrical rest from outer surfaces thereof. The cylindrical rest in its working position may cooperate with bush. Cylindrical cut may be opposite to receiving chamber orifices. The process groove is made as axial short and long cuts connected one to another so that as bush moves relatively the receiving chamber finger is displaced towards long axial cut.

EFFECT: increased simplicity and operational reliability, reduced costs.

2 dwg

FIELD: oil and gas industry, particularly to increase well productivity by hydrodynamical well perfection improvement.

SUBSTANCE: method involves determining actual formation productivity in opened well bore, namely potential productivity; determining actual productivity after well casing with string, cementing the string and perorating thereof; estimating degree of hydrodynamic well perfection by comparing actual productivity in opened well bore and that in string; performing geotechnical works in cased well to increase hydrodynamical well perfection; repeating above geotechnical works to approach actual productivity to potential one. Formation productivity in string and in opened bore is determined when formation is isolated from upper fluid in well.

EFFECT: increased efficiency due to possibility to determine potential formation productivity and to approach actual productivity to potential one.

FIELD: oil production industry, particularly equipment to take gas-and-liquid mixture samples at well head.

SUBSTANCE: sampler comprises tubular body mounted in pressure pipeline at well head, sample taking chamber and shutoff member. The tubular body is thick-walled and has end parts made as truncated cones with lesser bases facing each other and communicated by channel having diameter equal to lesser base diameter. Larger cone bases have equal inner diameters and equal to pressure pipeline diameter. Coaxial side channels are created within the bounds of through channel of tubular body. Pipe for reagent, namely demulsifier supplying in well product, is installed in one side channel. Air-tight seat of shutoff member is installed in another channel having several steps so that the seat is located in larger step thereof. The shutoff member has corresponding conical surface for air-tight seat creation and is installed in sample taking chamber having discharge pipe. End part of shutoff member is connected with tubular body by threaded connection and is terminated in extension for socket key and groove for screwdriver receiving. To provide uniform state of well product inner conical body walls are provided with rigidly fixed blades, namely turbulators, secured in flow direction. Discharge pipe and sample taking chamber have caps to prevent unauthorized oil sampling or discharge thereof at well head.

EFFECT: increased reliability of information concerning formation products due to increased sample quality and extended functional capabilities due to possibility to combine device for chemical demulsifier reagent introduction in oil to be conveyed, prevention of unauthorized formation product production or discharge thereof at well head.

3 dwg

FIELD: mining industry, particularly to take subsurface oil samples in running and exploratory wells working in flow mode.

SUBSTANCE: sampling device has tubular body with lock mechanism arranged inside the body and connected to controlling valve assembly from the first side and controllable valve assembly from the second side thereof. Joint relay is screwed on the controlling valve assembly. The controlling assembly is retained in its opened position by joint relay including body with orifices for pin receiving, pusher acting upon the controlling valve assembly and bush with fluid circulation orifices. Valve assemblies include all-rubber valves having 30° cone angles. The relay has barbs to engage with production string connector. When sampling device moves downwards the barbs are brought into folded state.

EFFECT: increased operational reliability and prevention of oil sample degassing due to improved air-tightness of sampling device interior.

2 cl, 1 dwg

Sampling device // 2258807

FIELD: oil field equipment, particularly for take samples from wellhead, namely for integrated sampling multi-component gas-liquid medium transported through pipelines.

SUBSTANCE: device has hollow body built in pressure pipeline and formed as a part of the pipeline located on vertical part of wellhead fittings. Multi-component gas-liquid medium flow control unit is made as a gate connected to rotary support shaft. Sampling chamber is created as annular cavity arranged on hollow body at gate level. Sampling chamber inlet is communicated with multi-component gas-liquid medium flow through intake manifolds formed on hollow body. Intake manifolds are side slots arranged symmetrically about gate axis of rotation. Sampling chamber outlet is communicated with shutoff member installed on rotary gate support shaft extension. Shutoff member includes seat, hold-down screw and ball contacting with the seat and embedded in pressure screw end.

EFFECT: simplified structure and increased sampling quality.

2 dwg

Sampler // 2257471

FIELD: oil-field equipment, particularly for obtaining fluid samples or testing fluids in boreholes or wells and may be used for integrated obtaining sample of multicomponent liquid-gas systems transported through pipelines.

SUBSTANCE: sampler comprises hollow body installed in high-pressure pipeline of wellhead fittings and extraction chamber with discharge channels. Rotary tool adapted for multicomponent liquid-gas medium flow regulation is installed inside the body. Sampler also has shutoff member with actuated sample extracting valve, handle and guiding tube. Sampler comprises hollow body made as a part of high-pressure pipeline and tool adapted for multicomponent liquid-gas medium flow regulation arranged in hollow body. The tool consists of flap installed on a shaft and having diameter corresponding to inner hollow body diameter, extraction chamber used to extract and mix multicomponent liquid-gas medium flow formed as annular cavity around hollow body. The cavity is divided into inlet and outlet parts by partition arranged at flap level. Inlet and outlet parts communicate with common multicomponent liquid-gas medium flow correspondingly through inlet and outlet channels on hollow body and through opening formed in the partition at sample extracting valve inlet. Drive screw installed in shutoff member body is connected with sample extracting valve so that drive screw and sample extracting valve may perform mutual rotation and move in axial direction. Sample extracting valve and shaft with flap mate each other so that they may perform synchronous limited rotation about common axis and mutual axial movement.

EFFECT: increased simplicity, provision of high-quality mixing of sample product and increased sample reliability.

3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes picking a sample of bed fluid under pressure by means of pump. Sample of fluid is then compressed by moveable piston, actuated by hydrostatic pressure in well through valve. Compressed sample of bed fluid is contained under high pressure inside the chamber with fixed volume for delivery to well surface. Moveable piston is in form of inner and outer bushings, moveable relatively to each other. At the same time several tanks for picking samples from several areas may be lowered into well with minimal time delays. Tanks may be emptied on well surface by evacuation pressure, to constantly provide for keeping of pressure of fluid sample above previously selected pressure.

EFFECT: higher reliability.

6 cl, 14 dwg

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