Method of continuous discrete indicator mark sampling from gas hole and device to this end

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil-and-gas industry and can be used in analysing fluid dynamics of gas medium at hydrocarbons deposits and subterranean gas storages. The proposed method comprises forcing gas medium indicator marks representing gas-filled micro granules with the dispersion degree of 0.5 to 0.6 µ into the bench through different injection holes and sampling from output holes. Note that indicator mark sampling is realised by forcing gas through sampling tube along with controlling gas passing time and the hole rate of yield, the sampling tube gas flow rate is determined from mathematical expression. The content of micro particles in indicator mark is determined from mathematical expression. The invention covers also the device to embody the above-described method.

EFFECT: continuous sampling, higher sampling efficiency and validity of results.

3 cl, 1 ex, 2 dwg

 

The technical field to which the invention relates.

The invention relates to the oil and gas industry and can be used in the study of excess gas environment in the fields of hydrocarbons, including underground gas storage.

The level of technology

Known methods for wells, which consists in injecting into the well luminescense solution, mainly fluorescence, with subsequent measurement of the luminescence intensity in the wellbore for the purpose of improving the reliability of detection lived asbestos [see Ferronsky VI and other Radioisotope methods of research in engineering Geology and hydrology. - M.: Atomizdat, 1977. - s; A.S. USSR № 987554 from 28.07.81,, CL G01V 9/00], are of particular interest in technical solutions, as specified in the USSR № 1639/23 from 16.05.88, and # 1473405 from 06.07.87,

There is a method of investigation of dynamic processes in multilayer deposits of natural gas [see also USSR № 1684491 from 30.03.89,, CL EV

47/10]. According to the method of introducing into the formation via the injection well an indicator in the media, not natural gas, mainly helium, take samples from the production well, determine the time of appearance of the indicator in the production of the production well, and the dependence of the time variation of the concentration of the indicator in the past and judge the message is emoti objects by the presence of the indicator in the output.

The disadvantage of this method consists in obtaining inaccurate data due to ambiguity of interpretation of the obtained results on multilayer gas, oil with gas cap deposits and UGS. Inefficient application of a known method in several wells, revealing the same horizon (layer) or different horizons (layers) in view of the ambiguity of the interpretation of the results, because of the impossibility of identification of the parish of helium from a particular injection well and the ability to skip (loss) part of the indicator wave due to the discrete sampling of the fluid. Repeated application of the method on the same field is also impossible because of the increased background (residual) contents helium, wavy ward indicator with a significant time delay. You cannot apply a known method for reservoir fracture type due to the fixation of only one peak arrival indicator in the production of the production well. Moreover, the method is not applicable to oil and gas, with the gas cap, deposits with a high content of helium in production.

There is a method of investigation of dynamic processes gas environment [see US patent No. 4742873, CL EV 47/10, publ. 10.05.88,]. By way of in injection wells inject p is lichnye indicators in the gas medium, from producing wells take samples and determine the concentration of indicators over time in production.

The disadvantage of this method stems from the fact that different indicators can have different properties with respect to reservoir conditions, which introduces significant error in the determination of the objective picture of the migration of gas during the operation of multi-reservoir hydrocarbons.

As the prototype accepted method for studying dynamic processes of the gas environment of an underground gas storage [see RF patent № 2167288, publ. 20.05.2001, CL EV 47/00, 47/10]. According to the method in the period of maximum pressure through different Central injection wells inject indicators in the gas medium in each of them download the indicator of the same color in the form of a gas-filled micro granules with the degree of dispersion of 0.5-0.6 μm, and the period of pressure reduction to the minimum weighted mean square values at the same time take samples of gas from the producing wells, determine the time variation of the concentration of indicators of each color, find the total number of the indicator of each color received in each injection well, build maps and largest share of migrating gas detect the direction of the in-situ casting and cross flows and framing gazodinamichesky different zones.

The disadvantage of the prototype is that when the sample is broken the process mode of operation of gas wells, namely, that it is necessary at the same time every day to take samples of gas from the producing wells for a long time, which makes a significant error in the determination of the volumetric pattern of migration of gas during the operation of UGS.

The sample gas is taken away, passing it through a fine screen with adhesive surface with a given gas flow rate measured by the gas meter. That is, sampling is discrete in nature and requires a lot of time on research.

The sample gas is passed through a fine filter with a sticky surface without regard to its strength characteristics and gas consumption as a percentage of its output.

A device for sampling gas from wells in the reservoir which previously entered the tracer token, or other substance - label-indicator.

From the literature it is known [2, see Technology tracer studies to identify ways of migration of fluids in the formation of anthropogenic accumulations of gas. Collection of scientific papers. A series of Oil and gas. Issue 1, Stavropol, TGTU, 1998, P.77-86. The authors Vikings S.A., Arutyunov AU, Shamshin VI]that the purpose of tracer studies is the establishment of a direct method is mi technogenic migration routes of fluids. Liquid samples were taken from wells separate shell on the rope.

When removing from the well the liquid sample is poured into a standard capacity, then was carried out by filtration of the liquid and were counting tracer particles in a given sample.

The shortcoming of the device for sampling fluid is the limited amount of sample that does not give the real picture of events, the presence of the filter tracer token can only give a picture of the existence of phenomena such as the presence of annular flows of fluid. To improve the reliability of research results requires repeated sampling of liquid.

Sampling gas shell problematic, and the use for these purposes sampler having small dimensions, it is not possible to obtain reliable information even after repeated sampling, i.e. the taking and analysis of samples has a discrete character.

Known sampling device [4, see A.S. No. 1016496, M CL EV 49/08. Sampling device, publ. 01.05.83. Bull. No. 17. Auth. Vgendrano, Gasbol].

The sampling device is a cylindrical hollow body with gauge, shut-off mechanism in the housing cavity, made in the form of a piston with a hollow stem and retainer. The piston through the radial hole and the hollow shaft communicates with an outlet pipe at the bottom position of the piston.

Design the function of the sampling device is mounted on the mouth of the studied wells, then the mouth opens the valve. Under the action of gas pressure moves the piston hollow rod to the extreme lower position of the investigated gas-liquid flow through the radial bore of the housing, the glass and the fitting on the high pressure hose goes to the separation plant, where continuous measurements and sampling of gas-liquid flow existing wells.

The disadvantages of the design of the device

With all the positive virtues of the device is the lack of observed previously, and it is discrete sampling on the separation of metering installation that requires a long time to get enough reliable information about the well performance and productivity of the reservoir as a whole.

The quantitative parameters of the well is determined not data measuring device, and external, i.e. the separator. The device cannot perform the capture and quantitative analysis of samples of gas-liquid flow with substance label-tracer during the continuous supply of part of a gas-liquid stream.

A device for installation of sensor control parameters of gas-liquid flow [3, see U.S. Pat. Of the Russian Federation No. 2094610, 6 EV 49/08, publ. 27.10.97. Bull. No. 30. The Authors Aieman, Peplonska, Vupputuri].

The device is installed on the existing Foundation of oil and gas from vain. Consists of a housing with ball shut-off valve, which is docked glass with hollow stem, a piston, a removable tip.

The body is made holes through which the message with the atmosphere. In the walls of the glass and the body is the channels that connect the body cavity with a cavity above the shut-off body. The tip is mounted on the lower end of the hollow rod goes inside the test object.

Disclosure of inventions

The technical result in the method of sampling gas with a substance-label-tracer, is achieved with the application of the wellhead device, which is installed as part of wellhead valves on the upper flange of the valve to enter into an axial channel of x-Mas tree sampling tube, its lower end at the level of the outlet pipe to the gas collector.

The diameter of the sampling tube determined on the basis of well parameters, technological and structural characteristics of the filter membrane.

The technical result of implementation of the method is also achieved with the help of the wellhead device, which is installed if necessary, research on annular line and space on the valves mesutronic and the annulus.

Wellhead device to implement the method consists of a split housing with inlet and resp is included nozzles. In place of the connector housing includes a double filter comprising a filter membrane and a ceramic filter with different permeability and different strength.

The filter membrane with a lower permeability is set first to the flow of filtered gas and covered with a layer of glue calculated thickness.

The device is provided with a gas flow regulator, pressure gauge and reverse relief valve.

Analysis of inventive step were as follows. The combination of technological methods for sampling gas on existing wells and an assessment of the results by the number of injected particles-label-tracer trapped and accumulated on the sticky layer of the filter membrane of the device, with the subsequent interpretation of the results on gas flow and time of sampling, not identified by existing sources in the scientific and patent literature.

Not revealed the design of the wellhead device, passes through a known measured gas flow and filtration tracer particles on the surface of the filter membrane, with fixation of the last layer of glue, the calculated thickness and the subsequent counting of the number of tracer particles.

The technical result is the following.

1. Improving the efficiency of the gas-sampling with substance-label-tracer and increases dostoverno the ü research results.

2. There is continuity of sampling by passing a definite volume of gas through the device for a long period of time in the process of gas production and trapping of the tracer on the sticky adhesive layer of the filter membrane and the subsequent evaluation of the capacitive characteristics of the layer by the number of trapped particles tracer in comparison with the total number of tracer particles introduced into the reservoir through neighboring wells.

3. You can use the same device for sampling gas with a substance-label-tracer and tube, pipe and annulus.

The implementation of how the trapping substance-label-tracer and the study is carried out using a device, which is represented in section in figure 1.

Figure 2. piping of the wells and installation as part of wellhead equipment for sampling gas with a substance-label-tracer of the tubing string, the tubing and the annulus.

The technical result that can be obtained by carrying out the present invention, is as follows: increases the reliability of the research due to the continuous sampling of the indicator from the gas stream under optimal conditions, do not violate the technological lifetime of the well.

The technical result is achieved in that in the method nepreryvnogo discrete sampling of the substance label indicator from a gas well, based on the introduction into the reservoir through different injection wells indicators in the gas medium in the form of a gas-filled micro granules degree of dispersion of 0.5-0.6 μm, the sampling of the extraction wells and the determination of the concentrations of the indicators over time in the production wells, the sampling of indicators carried out by passing a part of the gas through the device (sampler) with the time control passes gas and flow rate, and the amount of gas flow through the sampler is determined from the ratio

,

where dVPRthe inner diameter of the sampler, m;

QGPRthe gas flow rate through the sampler, m3/s;

ρ2- gas density, kg/m3and the content of the microparticles of the indicator is determined from the ratio

Ci=Ki·(QGPR·ti)-1,

where Kithe number of microparticles indicator on the surface of the filter membrane units;

QGPR- average gas flow rate through the sampler for a period of time passes (filter) gas ti, (C), m3/s

The device for implementing the method includes a split housing with a sampling tube for inlet and gas inlet, pressure gauge, flow regulator and is equipped with dual filter comprising a membrane and a ceramic filter having a different PR is nichebot, moreover, the filter membrane is covered by a gas-flow layer of glue, the specific gravity of which is determined by the relation

where MUDL- the specific gravity of the adhesive, kg/m2;

dfrequent- the diameter of the microparticles of the indicator, m;

ρCLthe density of the adhesive, kg/m3,

and the diameter of the sampling tube is determined from the relationship

dmp=dwnnt·(QGPR/QSLE)0,5,

where dwnnt- internal pipe diameter tubing string (tubing), m;

QSLE- well flow rate, m/s,

moreover, the sampling tube for sampling gas from the annulus is made in the form of a semicircle, the diameter of which is determined by the relation

where dwill- inner diameter of the production string, m;

dnanct- outer pipe diameter tubing string, M.

Analysis of inventive step were as follows. The combination of technological methods for sampling gas in existing wells and an assessment of the results by the number of injected particles tags and captured on the filter membrane with the subsequent interpretation of the results on gas flow and time of sampling detected according to the available sources fame scientific, technical and patent information.

Not the detection is on the design of the wellhead device, passes through the measured flow rate of the produced gas, filtered on a filter membrane with retention of particles-marks on its sticky surface and subsequent counting their number.

Brief description of drawings

The implementation of the method of continuous discrete sampling of a substance-label indicator from a gas well is using the device, the construction of which is illustrated by the following drawings: in which figure 1 is presented in the context of the design of the wellhead device in position passes gas with particles-label, figure 2 - piping of the existing wells and device for sampling gas with a substance-label of the tubing string of pipes (a)and tube (b) and annulus (in) of space.

The implementation of the invention

The device consists of a detachable housing 1 with the inlet pipe 2 and a discharge pipe 3. In the middle part of the split housing 1 a sequentially filter membrane 4 with the adhesive surface, for example a layer of glue, and ceramic filter 5 with different permeability, the components of the double filter. In addition, to preserve the integrity of the filter membrane 4 and the stability of the conducting sampling split housing 1 is equipped with a safety valve 6. Force (pressure) safety valve 6 maintains the is a screw (not shown). The pressure inside the split housing 1 is measured by a pressure gauge 7.

The inlet pipe 2 is equipped with a set of sample tubes 8 for delivery of gas samples inside the split housing 1.

On the outlet pipe 3 is installed a gas flow regulator (not shown).

Consider the operation of the device at the sampling gas with a substance-label-tracer from the tubing string of pipe while natural gas production.

For this purpose, the device is equipped with a sampling tube 8, the calculated diameter and length to be installed in the inlet pipe 2, and is fixed on the upper flange of the valve x-Mas tree with closed root valve (not labeled).

Open the root valve and the upper valve, and the valve on the gas flow field manifold. Define and maintain the calculated pressure drop in the device and control the gas flow rate estimate total flow during the research, which compared with the production of the well.

Then after a definite period of time, stop the flow of gas in the plug housing 1 of the sampling device, remove the filter membrane 4 lesser permeability and provide the count of the number of particles-marks on its surface under laboratory conditions, after which the results obtained correlate the number of particles in IP is ledway layer. With increasing pressure differential above the permissible actuates the safety valve 6 and the gas is released into the atmosphere.

For the variant sampling of the annulus, the device is equipped with a sampling tube 8 in the form of a semicircle is introduced into the annular gap between the pipe tubing string and the production column, and the gas is carried out at the overlap of at least 10% of the living section of the annular space between the tubing string and casing.

The diameter and length of the sample tube 8 is determined on the basis of structural parameters x-Mas tree, and the internal diameter of the pipe tubing string, and operation of wells.

At the same time be aware that the filter membrane 4 lesser permeability has known strength characteristics, based on which it is possible to determine the gas flow rate and the diameter of the sample tube 8.

High-speed gas pressure must not exceed the strength of the material of the filter membrane 4 with lower permeability, adopted by σ=0,2·106PA.

The dynamic pressure generated by the gas flow on the filter, lower permeability will be determined

where ρg- gas density, kg/m2;

V2GCRcritical speed of the gas in the gazootbornik, m/S.

Then

To the flow of the moving gas has not led to the destruction of the filter membrane 4 lesser permeability, the gas flow through the device (sampler) must satisfy the inequality

where- maximum gas flow rate through the sampler, m3/s;

- inner diameter of the split housing 1 sampler at the location of the filter membrane lesser permeability, m

On the other hand, that was not observed output or loss of tracer from the gas stream, the gas flow rate through the sampler must satisfy the inequality

where- the minimum possible flow through the sampler, m3/s;

VGMP- the minimum speed of the gas, in which there is a release microgranules of tracer from the stream, m/s, which is equal to 5·10-3m/S.

Based on the above, the gas flow rate through the sampler will be determined from the inequality

Where the diameter of the sample tube 8 with regard to videotranny dependence will be determined

dprmr=dTubing·(QGPR/QSLE)0,5,

where dTubing- internal pipe diameter tubing string, m;

QSLE- gas flow rate is issleduemoi well, m3/c.

The method of sampling gas from existing wells using the proposed device is as follows.

Open the valve on the wellhead tree and the sampling tube 8 of a given cross-section implement the gas in the plug housing 1 of the sampler.

Determine the pressure drop across the filter membrane 4 and a ceramic filter 5 and the regulator of the gas flow set flow rate and estimate the total volume of gas passing through the sampler during the sampling or measurement period. The time of sampling of gas and the total flow rate through the sampler is compared with the total production of the well. Then stop the flow of gas in the plug housing 1 sampler, carry out the disassembly and removal of the filter membrane 4 from adhering to its sticky surface particles of microgranules of tracer.

Then carry out the calculation of the total number of tracer particles on the surface of the filter membrane 4 and assess the overall concentration of microgranules of tracer at a certain point in time from the expression

Ci=Ki·(QGPR·ti)-1,

where Ki- the number of microgranules of tracer on the surface of the filter membrane units;

QGPRthe gas flow rate through the sampler, m3/s;

tithe time of sampling (filter) gas through Preboot rnic, equal to the time between changing filters lesser permeability;

Withithe concentration of microgranules of tracer at timem3.

Concentrationiand the magnitude of its change in time is judged on geofluidodynamical the reservoir parameters [see Locker L., Shestakov, V. M., "Modeling migration of groundwater". M.: Nedra, 1986, 208 S.].

It should be noted that with the increase of the pressure drop across the filter membrane 4 actuates the safety valve 6 and the gas is released into the atmosphere.

The design of the filter membrane 4 lesser permeability developed taking into account the need for gas filtration, trapping and accumulation of microgranules of tracer on its surface. Because its surface is covered with glue their thickness determined from the size of the microgranules of the tracer, the glue on the filter surface is applied with a specific gravity of

where dfrequent- the diameter of the microgranules of the tracer, m;

ρCLthe density of the adhesive, kg/m3.

For the variant sampling of the annulus device (sampler) supplied sampling tube 8 in the form of a semicircle is introduced into the annular gap between the pipe tubing string and the production column, and the gas is carried out at the overlap of at least 10% alive is the first section of the annular space.

The steps of sampling gas from the annulus and interpretation of the obtained results similar to those when sampling gas from the tubing string.

An example of a specific implementation of the method.

Accept debit wells

Internal pipe diameter tubing string dmp=0,062 m

The external diameter of the pipe tubing string (tubing) dTubing=0,073 m

The diameter of the production string:

- externalD=has 0.168 m
- internalDNR=0,148 m

The inner diameter of the sampler in cross section the installation of the membrane dCR=0,032 m

The density of the gas ρg(N.U.)=0,668 kg/m3.

The strength of the material of the filter membrane σ=0,2·106PA.

The size of the microgranules of the tracer dfrequent=0,5÷0,6 ám.

The density of the adhesive ρCL=1200 kg/m3.

The gas pressure p=30 kN/cm2=3.0 MPa (gadomski horizon Severostavropolskoye UGS).

Determine the density of gas in the well

where R0- atmospheric pressure, PA.

From the condition of strength of the membrane defined by the critical speed of the gas (velocity head), m/s

This speed corresponds to the gas flow through the membrane sampler:

The minimum speed of the gas to ensure the retention of microgranules of tracer in the stream VGMP=5·10-3m/s gas Flow through the membrane corresponding to this speed:

Thus

as 4.02·10-6<QGPR<0,362

For further calculations we estimate average flow QGPR=0.18 m3/s ratio of gas flow in the borehole and through the sampler defined by the diameter of the sampling tube (internal)

.

Further, in laboratory conditions is counting tracer and is determined by its concentration according to the formula

Ci=Ki·(QGPR·ti)-1.

Specific gravity glue

.

Square filter

.

Thus, on the surface of the filter should be applied

MUDL·Sf=0,00048·0,0008=0,384·10-6kg=0,384·10-3g=0,384 mg of glue. The thickness of the layer

.

Uniformly distributed on the surface of the filter layer of glue should be of the order of 0.4 microns.

Calculate the diameter of the sample tube for the same consumption values in the selection of gas from the annular space is TBA:

Radial clearance: Δr=(0,148-0,073)/2=0,0375 m=37,5 mm

Test conditions requirements overlap not less than 10% of the living section of the annulus:

10% of the sectional area of the annulus will be

f10%=(0,1482-0,0732)·0,785·0,1=0,0013 m2.

The sample tube 8 with a diameter of 38 mm, cut along the axis in the form of half rings and inserted through the valve annulus to a stop in the tubing, close the area equal to

f=dMRM·Δr=0,038·0,0375=0,001425 m2>0,0013 m2- the condition is met.

The present invention in comparison with the prototype and other known technical solution has the following advantages:

- improving the efficiency of gas-sampling;

- improving the reliability of research due to the continuous sampling of the indicator from the gas stream under optimal conditions for a long time;

- simplifying the design and improving reliability of the device.

Sources of information

1. Vikings S.A., Arutyunov AU, Shamshin V.I. Technology tracer studies to identify ways of migration of fluids in the formation of anthropogenic accumulations of gas / Sat. scientific papers. Series "Oil and gas" Issue 1. - Stavropol, TGTU, 1998. - p.77-86.

2. Beketov D.B, Vikings S.A., Trunov NM, Tarasov MG and other Technology tracer is s research to identify ways of migration of fluids in the formation of anthropogenic accumulations of gas. Construction of gas and gas condensate wells / Sat. scientific papers, M: VNIIGAZ, 1998.

3. Pat. Of the Russian Federation No. 2094610, M CL EV 49/08. Device for installation of sensor control parameters of gas-liquid flow. Publ. 27.10.97. Bull. No. 30. Auth. Wahrman A.L., don FP, Patri VP

4. A.S. No. 1016496, M CL EV 49/08. Sampling device. Publ. 07.05.83, bull. No. 17. Auth. Kondratenko V.G., Sable GA

5. A.S. No. 176218, M CL EV 43/00. The method of detecting the leakage of the production casing of a gas well. Publ. 02.11.65, bull. No. 22. Auth. Ashev A.P., Balabanov SCI and other

1. The method of continuous discrete sampling of the substance label indicator from a gas well comprising introducing into the formation through different injection wells indicators in the gas medium in the form of a gas-filled micro granules with the degree of dispersion of 0.5-0.6 μm, sampling from wells, characterized in that the sampling of indicators carried out by passing the gas through the sampling tube with the time control passes gas and flow rate, and the amount of gas flow through the sampling tube is determined from the ratio

where dVPRthe inner diameter of the sampling tube, m;
QGPRthe gas flow through the sampling tube, m3;
ρ2- gas density, kg/m3,
and the content of m is of crosrol indicator is determined from the ratio
Ci=Ki·(QGPR·ti)-1,
where Kithe number of microparticles indicator on the surface of the filter membrane pieces;
QGPR- average gas flow through the sampling tube for a period of time passes (filter) gas (C), m3;
tithe time of sampling (filter) gas through the sampler is equal to the time between changing filters lesser permeability;
Cithe concentration of microgranules at the time

2. The device of continuous discrete sampling of the substance label indicator from a gas well, comprising a split housing with a sampling tube for inlet and gas inlet, pressure gauge, flow regulator, characterized in that it is equipped with dual filter comprising a filter membrane and a ceramic filter with different permeability, the filter membrane is covered by a gas-flow layer of glue, the specific gravity of which is determined by the relation

where MUDL- the specific gravity of the adhesive, kg/m2;
dfrequent- the diameter of the microparticles of the indicator, m;
ρCLthe density of the adhesive, kg/m3,
and the diameter of the sampling tube is determined from the relation
dTr=dwnnt·(QGPR/QSLE)0,5,
where dwnnt- internal diameter of pipe Elevator Colo is HN (tubing), m;
QSLE- well flow rate, m3/s

3. The device according to claim 2, characterized in that the sampling tube for sampling gas from the annulus is made in the form of a semicircle, the diameter of which is determined by the relation

where dwill- inner diameter of the production string, m;
dnanct- outer pipe diameter tubing string, M.



 

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2 cl, 3 dwg

FIELD: petroleum industry.

SUBSTANCE: invention relates to investigations of subsurface samples of fluids and particularly, to taking aliquot subsurface microsamples of formation fluids for conducting in-situ express analysis. The well device contains the sampling tank and several microsampling chambers. Microsampling chambers may have at least one window for input of energy of visible emission, emissions in the near and middle fields of the infrared range and energy of other kinds of electromagnetic emission into the tank for samples collected in the microsampling chamber, in the well or downhole. Such window can be made of sapphire or another material transparent for electromagnetic emission. Besides the whole microsampling chamber can be made of sapphire or other material transparent for electromagnetic emission with a possibility of visual control or analysis of samples in the microsampling chamber. The microsampling chamber makes it possible to immediately analyse a sample obtained in situ, on the surface to determine the quality of the sample contained in the main sampling tank or to make thorough analysis of the same.

EFFECT: increased sampling capacity and express analysis of samples, more accurate determination of the parameters of the sample.

30 cl, 8 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

FIELD: oil industry.

SUBSTANCE: device has hollow body which is a fragment of force pipeline at vertically placed portion of mouth armature. Tool for controlling flow of multi-component gas-liquid substance is made in form of valve, connected to rotary support. Sample chamber is a ring-shaped hollow in hollow body, placed at same level with valve and connected at inlet to flow of multi-component gas-liquid substance through extracting channels, made on hollow body. Extracting channels are made in form of side slits, positioned symmetrically relatively to valve rotation axis. Ring-shaped hollow on hollow body is connected at outlet to locking tool, mounted at extension of valve shaft and made in form of sample-taking valve. Valve shaft and sample-taking valve are interconnected through hollow intermediate shaft. Sample-taking valve is placed in the body of locking tool with possible reciprocal movement. Valve shaft and hollow intermediate shaft are interconnected with possible mutual rotation for a quarter of one turn.

EFFECT: simplified construction and maintenance, higher quality.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body in form of calibrated cylinder. From both sides lids are connected to body. Inside the body separating piston and ball for mixing sample are placed. Also provided is hydraulic resistance for slow inlet of sample. Slide valve is used for safe inletting, pressurization and depressurization of taken fluid, is connected to lid and consists of rod with channels and bushing with clamp. Clamp is held between nuts interconnected by threads, one of which is connected to rod by thread. Needle valve consists of locking pin and axle-bearing and is used to drain pressure from closed space above slide valve prior to disconnection of sample-taking container from bed-testing equipment.

EFFECT: simplified construction, higher reliability.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow body mounted in force pipeline, inside of which body tool for controlling flow of multi-component gas-liquid substance is placed, probing chamber with extracting channels, locking tool with handle and guiding pipe, driving valve for picking sample, mounted with possible interaction with spring-loaded rod, placed inside the shaft of flow control tool. Hollow body is a fragment of force pipeline at vertical portion of mouth armature, control tool is made in form of valve of lesser diameter, then inner diameter of hollow body, and probing chamber is a ring-shaped hollow in hollow body, positioned at same level with valve and connected at input to flow of multi-component gas-liquid substance through extraction channels, made symmetrically to rotation axis of valve, and at output - to locking tool, while rod is provided with shelves for multi-start thread of appropriate cross-section, made at shaft on length of no less than quarter of axial step of this thread.

EFFECT: simplified construction, higher efficiency.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow cylindrical body, branch pipes for extraction and output of sample and locking element. Body is made thick-walled. End portions of body are made in form of truncated cone and interconnected, on the side of lesser bases by means of channel. Branch pipe for extraction of sample is made elongated, with length equal to body diameter, and is let through in transverse direction of body through the center of said channel. Within limits of branch pipe cross-section its hollow is separated by slanted solid wall on two portions, each of which is connected thereto. One portion of branch pipe hollow is meant for taking sample, other one - for feeding reagent into well product. To receive trustworthy information about sample, by setting flow to homogenous state, inner surface of cone, on the side of larger base, is provided with rigidly fixed blades for turbulization of flow flowing into body, while diameter of channel connecting cones is selected equal to diameters of their lesser bases.

EFFECT: simplified construction, broader functional capabilities, higher quality of sample.

2 cl, 3 dwg

FIELD: oil industry.

SUBSTANCE: hollow body of device is actually a fragment of force pipeline at mostly vertical portion of mouth armature. Organ for controlling flow of multi-component gas-liquid substance is made in form of valve mounted on shaft having lesser size, than inner diameter of hollow body. Sample chamber is in form of ring-shaped hollow on hollow body, positioned at same level with valve. Ring-shaped hollow is connected at input to flow of multi-component gas-liquid substance through intake channels, positioned symmetrically to valve rotation axis, and at output - with locking organ. Driving screw mounted on body of locking organ is connected to sample-taking valve with possible mutual rotation and combined axial displacement. Sample-taking valve and shaft with valve are mated with possible synchronous rotation around common axis and relative axial displacement. Working organs of device are positioned immediately near main flow of substance taken as sample to provide for lesser dimensions of device and prevented freezing in winter season.

EFFECT: simplified construction, simplified maintenance.

7 dwg

FIELD: oil production industry, particularly methods or devices for cementing, for plugging holes, crevices, or the like.

SUBSTANCE: device comprises inflatable packers to be lowered into well along with flow string. One flow string end is closed to provide simultaneous well bore packing, another end is connected to production equipment. Flow string is provided with centralizers located near inflatable packers. Formed in flow string are additional holes located opposite to packers. Well pump is installed inside flow string. High-pressure water conduit having low diameter is connected to above holes. Flow string has perforated orifices created between inflatable packers.

EFFECT: extended operational capabilities.

1 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

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

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

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