Method and sensor for gas monitoring in well environment
FIELD: method and sensor for gas monitoring in well environment.
SUBSTANCE: method involves providing infrared light-emitting diode in well; transmitting corresponding infrared signals to the first optical path extending from the diode through well gas sample and the second optical path extending from the diode through gas sample; detecting transmitted infrared signals and determining concentration of component in well gas sample from detected signals. The first optical path is free of liquid.
EFFECT: increased accuracy of gas monitoring.
36 cl, 4 ex, 19 dwg
The text descriptions are given in facsimile form.
1. The method of gas monitoring in the environment of the borehole, comprising the following steps:
ensuring the well infrared LEDs;
the operation of the specified diode for transmission of the corresponding infrared signal on the first optical path extending from the diode, through the sample downhole gas, and a second optical path extending from the diode through the reference gas sample, the first optical path is free from liquid the tee;
detection of transmitted infrared signals; and
determining the concentration of the component in the sample downhole gas detektivami signals.
2. The method according to claim 1, which further comprises filtering the sample downhole gas to remove liquid.
3. The method according to claim 1, which additionally comprises removing a sample of the downhole gas from the fluid bore in which the gas is dissolved or dispersed, by transport of dissolved or dispersed gas through the gas-permeable membrane, and the sample extracted downhole gas is free from liquid.
4. The method according to any of the preceding paragraphs, in which the led operates in the reverse bias mode.
5. The method according to claim 1, wherein the led is an led operating in the middle infrared region.
6. The method according to claim 1, wherein said component is a CO2.
7. The method according to claim 1, wherein said component is a CH4.
8. The method according to claim 1, wherein said component is an H2S.
9. The method according to claim 1, wherein the led has a wavelength of peak emission in the range of 2 to 5 μm at 140°C.
10. The method according to claim 1, in which the reference gas sample contains a given concentration of the specified components is the same.
11. The method according to claim 1, wherein the second optical path has a zero optical density at the wavelength of emission of the diode.
12. The method according to claim 1, in which the led is operated for the transmission of additional infrared signal to the third optical path extending from the diode, while the third optical path has a certain optical density at the wavelength of emission of the diode.
13. The method according to item 12, in which a certain optical density is equal to zero.
14. The method according to claim 1, in which the length of the first optical path is set or selected in accordance with the predicted concentration of the specified component.
15. The method according to claim 1, in which the length of the first optical path is less than 1 mm.
16. The method according to claim 1, in which is provided a set of infrared light-emitting diodes, each diode is adapted for use in the appropriate temperature range, and diodes selectively operate in accordance with the temperature in the well.
17. The method according to claim 1, in which the first optical path includes an optical fiber that passes through the sample downhole gas, the infrared signal on the first optical path is transmitted along the optical fiber via total internal reflection.
18. The method according to claim 1, wherein a set of corresponding photodiode detectors is provided for the children is the pit of transmitted infrared signals.
19. A sensor for monitoring gas in the environment of the well, containing
Department for the content of the reference gas sample;
means of detection for detecting the corresponding infrared signals transmitted on the first and second optical path extending from the diode, where the first optical path crosses when using the sample downhole gas, the second optical path intersects the specified branch, and the sensor is constructed in such a way that when using the first optical path is free of fluid; and
a processor for determining the concentration of a component in the sample downhole gas detektivami signals.
20. The sensor according to claim 19, which further comprises a filter for filtering the sample downhole gas to remove liquid.
21. The sensor according to claim 19, which further comprises a gas-permeable membrane, and the sample downhole gas is extracted from the borehole fluid, in which the gas is dissolved or dispersed, by transport of dissolved or dispersed gas through the membrane, while the extracted sample downhole gas is free from liquid.
22. Sensor according to any one of p-21, which additionally contains
transparent or reflecting infrared is Opticheskie device on the first optical path, the device limits the sample downhole gas; and
ultrasonic cleaner for removing liquid from the surface of the device so that the first optical path is maintained free of fluid.
23. The sensor according to claim 19, in which the led is an led operating in the middle infrared region.
24. The sensor according to claim 19, in which the led has a peak wavelength of emission, in the range of 2 to 5 μm at 140°C.
25. The sensor according to claim 19, in which the detection means are placed to detect additional infrared signal transmitted on the third optical path extending from the led, while the third optical path has a certain optical density at the wavelength of emission of the diode.
26. The sensor A.25, in which a certain optical density is equal to zero.
27. The sensor according to claim 19, in which the length of the first optical path is set or selected in accordance with the predicted concentration of these components.
28. The sensor according to claim 19, in which the length of the first optical path is less than 1 mm.
29. The sensor according to claim 19, which further comprises a set of infrared light-emitting diodes, each diode has a capability of functioning in the appropriate temperature range, and the diodes are selectively according to the temperature in the well.
30. The sensor according to claim 19, which further comprises a light guide, which passes through the sample downhole gas, the infrared signal on the first optical path is transmitted along the optical fiber via total internal reflection.
31. The sensor according to item 30, which further comprises an ultrasonic cleaner for removing liquid from the surface of the light guide, so that the first optical path is maintained free of fluid.
32. The sensor according to claim 19, in which the means of detecting contain many relevant photodiode detectors for detecting the transmitted infrared signals.
33. The sensor according to claim 19, which is placed in the well.
34. The downhole tool containing a sensor according to any one of p-32.
35. The downhole tool 34, which is a tool for geophysical research in the production well.
36. The downhole tool 34, which is a descent tool for sampling.
FIELD: investigating or analyzing of materials.
SUBSTANCE: method comprises measuring absorption coefficients of three pure hydrocarbons, measuring absorption coefficients of standard gasolines, determining coefficients C1, C2, and C3 of the standard gasolines by comparing their absorption spectra with the model ones.
EFFECT: enhanced precision.
2 cl, 2 dwg
FIELD: measuring technique.
SUBSTANCE: device comprises source of laser beam, controller of output laser radiation, controller of modulation of wavelength, two light receivers, two detectors of the component of the DC, three demodulators of modulation of wavelength, optical system, standard cell, analyzer, adder, means for measuring temperature, and means for measuring pressure. The device is additionally provided with the means for measuring two components of velocity of flow and vertical component of velocity of gas.
EFFECT: reduced time of response and enhanced stability.
13 cl, 17 dwg
FIELD: analyzing or investigating of materials.
SUBSTANCE: method comprises extracting methanol from the condensate by means of distillated water by setting 500-100ml of condensate in the separating funnel, adding 50-100 ml of distillated water to the condensate, mixing the liquids for 20 min, allowing the mixture to settle out to separate the water from methanol, and analyzing the extractant by means of method of infrared spectrometry.
EFFECT: reduced time of and simplified procedure of analyzing.
1 cl, 1 ex
FIELD: analytical chemistry.
SUBSTANCE: IR-spectrometer cell can be used for identification and quantitative analysis of low volatile matters in solutions by means of IR-spectrometry. Cell has cone-shaped container for evaporating solvent from solution to be tested. Cell has opening in center. Cell is made of solvent-resistant materials. Cell also has window to be moisture-proof glued to lower part of cone-shaped cell. Window is made of material being transparent to IR-radiation and being resistant to influence of solvents.
EFFECT: reduced cost; shortened time of analysis.
FIELD: methods of determining of location of point source of visualized gas leakage.
SUBSTANCE: automated finding of location of visualized gas leakage point source is carried out by means of search of angle crf(x*, y*, τ) in response function, which function is calculated on base of row of frames of gas leakage image, of maximal values from variables (x*, y*) being stable in relation to time variable τ. Point (x*, y*) is assumed as point source, if function of response of angle crf(x*, y*,τ) has maximal value at mentioned point (x*, y*) and if this point is time stable.
EFFECT: improved determination of location of visualized gal leakage point source.
14 cl, 8 dwg
FIELD: non-destructive real time analysis of physical and chemical properties of one or several seeds.
SUBSTANCE: radiation is directed onto sample with composition of radiation from mixed wave lengths. Radiation is emitted by a set of sample points discontinuously positioned in space, emitted radiation of mixed wave lengths is dissolved for each point in space being analyzed with production of appropriate spectral image, containing a set of spectral components with individual wave lengths, for each point being analyzed, positioned discontinuously in space in appropriate spectral image wave lengths of individual spectral components are determined and aforementioned spectral components with individual wave lengths are subjected to comparison to model, which sets up connection between presence of certain spectral components in spectral image with individual wave lengths and presence of certain property.
EFFECT: increased speed of analysis by means of equipment, built into agricultural processing machine.
10 cl, 22 dwg
FIELD: measuring technique.
SUBSTANCE: IR gas analyzer can be used for measuring concentrations of gases in multiple-component mixtures. Multiple-component IR-range gas analyzer has electromagnet radiation source made in for light-emitting diode array, which irradiates reference and working waves. Light-emitting diode array is connected with excitation current pulse oscillator which is synchronized by microprocessor. Radiation of reference and working waves first enters additional pyroelectricity-type photoreceiver, and then it passes through gas dish and enters basic pyroelectricity-type photoreceiver. Outputs of any pyroelectric photoreceiver are connected with signal processing unit through pre-amplifiers and sync detectors. Signal processing unit has analog-to-digital converter. Output of analog-to-digital converter is connected with input of microprocessor. One output of microprocessor is connected with digital-to-analog converter, which is connected with light-emitting diode array's current pulse forming circuit to adjust intensity of radiation of light-emitting diodes of array according to preset algorithm. Three other rest outputs of microprocessor are connected with inputs of light-emitting diodes' current pulse forming circuit to control operation of light-emitting diodes according to certain sequence.
EFFECT: improved precision of measurement.
FIELD: analyzing or investigating materials.
SUBSTANCE: method comprises forming a super-thin layer of the water system to be investigated, infrared spectrometry of the layer, and determining the value of the Makhalanobis criterion. The degree of structure of the water system is obtained from the formula Y = - 0.00000012X3 + 0.000316X2 - 0.311X = 133.2, where Y is the degree of structure of water system in arbitrary units and X is the value of the Makhalanobis criterion.
EFFECT: enhanced accuracy.
FIELD: silicon compounds technology.
SUBSTANCE: tetrafluorosilane production process comprises following stages: (1) hexafluorosilicate heating; (2-1) reaction of tetrafluorosilane gas containing hexafluorodisiloxane formed in stage (1) with fluorine gas; (2-2) reaction of tetrafluorosilane gas containing hexafluorodisiloxane formed in stage (1) with fluorine-polyvalent metal compound; (2-3) reaction of tetrafluorosilane gas obtained in stage (2-1) with fluorine-polyvalent metal compound. Finally, high-purity tetrafluorosilane with 0.1 ppm by volume of hexafluorodisiloxane is obtained, which is applicable in manufacture of optical fiber, semiconductors, and sun battery elements.
EFFECT: reduced content of impurities in product.
24 cl, 1 dwg, 1 tbl, 9 ex
FIELD: oil extractive industry and other industrial branches, where it is required to determine mass concentration of suspended particles with hardness of no more than 5 units of Mohs scale in well product.
SUBSTANCE: precipitation of suspended particles received from well product in form of liquid is dried and pressed with lower bromide potassium. Infrared spectrum of precipitation is recorded, its mineral composition is identified and it is compared with Mohs scale. With consideration of calibrating infrared spectrums concentration of suspended particles with hardness of no more that 5 units is calculated with converting to liquid volume.
EFFECT: improved efficiency.
FIELD: equipment for reservoir gas presence in drilling mud flow passing via well during well drilling.
SUBSTANCE: device comprises at least on sensing chamber to be connected to drilling string for well drilling. Each sensing chamber contains taken gas volume and comprises membrane wall for reservoir gas penetration from drilling mud flow in sensing chamber. Sensor provides determination of said gas volume characteristics change caused by reservoir gas penetration from drilling mud flow in sensing chamber through membrane wall.
EFFECT: increased reliability and accuracy of gas detection.
16 cl, 4 dwg
FIELD: in-situ or remote measurement and analysis of drilling mud, completion fluid, completion fluid, industrial solutions and reservoir fluids.
SUBSTANCE: method involves taking liquid samples from predetermined liquid sample taking points where drilling mud, completion fluid, completion fluid, industrial solutions and reservoir fluid flow or are stored; introducing the samples in chemical analyzing microfluid system linked to computer device; performing one or several selected tests in said microfluid device with the use of test result detecting and data creation means; converting said data with analytic test results obtaining; monitoring said results to control selected parameters of drilling operation, reservoir penetration and operation.
EFFECT: decreased amount of sample and test reagents.
12 cl, 3 ex, 3 tbl, 5 dwg
FIELD: oil and gas production, particularly equipment for oil and gas property investigation under reservoir conditions.
SUBSTANCE: plant comprises piston container with plug and transfer unit, which moves sample from piston container into measuring press including two piston pumps having equal capacities. One piston pump delivers sample from piston container, another one lowers floating piston in measuring press. Measuring press is provided with floating piston having hollow shaft, ultrasonic linear displacement sensor for oil volume determination and electronic linear displacement sensor for gas volume determination. Circulation piston pump provides unidirectional oil circulation at controllable rate. Viscosimeter has bypass with shutoff valve. Single thermostating shell encloses all components of the plant.
EFFECT: increased accuracy of oil and gas volume and viscosity determination, decreased sample characteristic measurement time under reservoir conditions and, as a result, increased operational efficiency.
FIELD: oil and gas industry, particularly obtaining fluid samples or testing fluids in pipelines.
SUBSTANCE: device comprises pipeline, body made as connection pipe with hollow shaft and cock. Hollow shaft is fixedly connected to pipeline in air-tight manner and is made as connection pipe with beveled end and radial orifices facing liquid flow made in shaft side opposite to that provided with beveled end. Pipeline has restriction located downstream of the shaft. Another end of connection pipe is air-tightly connected to pipeline downstream of the restriction and located in decreased pressure zone. Connection pipe section defined by cock and the second end is provided with cylindrical case with piston, which may slide in axial direction with respect to the case. The case has discharge connection pipe arranged from cock side. The piston comprises valve providing liquid flow from the cock side. The cock is made as a cylinder with electromagnet and shaft air-tightly installed in the cylinder and sliding with respect to the cylinder in axial direction by means of electromagnet. Cylinder has outlet connection pipe and is communicated with discharge connection pipe. Both connection pipes are closed with shaft. The shaft has two annular grooves. The first groove may communicate connection pipe with cylinder to seal the connection pipe as shaft moves inside the cylinder. The second groove may communicate outlet and discharge connection pipes as shaft slides inside the cylinder.
EFFECT: increased sample taking quality.
FIELD: oil and gas industry, in particular, engineering of devices for integration sample taking of paraffin containing water-oil emulsions from pipelines.
SUBSTANCE: sample taker includes body mounted on pipeline, in the socket of which spindle is mounted with possible progressive movement along thread, valve positioned on spindle head, interacting with saddle, sample-taking pipe, mounted in threaded socket of body below saddle. Round rod, connected to valve, is coaxially positioned inside sample-taking pipe. Metallic plates for removing paraffin sedimentations are mounted on the rod. Sample-taking pipe is made with longitudinal slit recess facing the liquid stream.
EFFECT: increased efficiency.
FIELD: oil production, particularly devices to perform reservoir tests in wells, including that having opened bores.
SUBSTANCE: device comprises upper connection unit for device fixation on pipe string, upper and lower packers with sealing members, upper and lower movable rods provided with axial channels arranged inside packers and hollow filter installed between upper and lower packers. Axial channel of lower movable rod is provided with solid partition. Upper and lower movable rods are fixedly connected with each other in air-tight manner and provided with upper connection unit. Upper and lower rods may be displaced only in downward direction with respect to upper and lower packers. Sealing members of upper and lower packers are located between stops. Upper stop of lower packer is fixedly connected with lower stop of upper packer provided with balloon-type centrators through hollow filter. The balloon-type centrators are arranged from top thereof. One stop of each packer is made as hydraulic cylinder fixedly connected with packer and as annular piston cooperating with sealing member. Inner cavities of each hydraulic cylinder may cooperate with axial channels of movable rods over solid partition and may provide air-tight isolation thereof during movable rod displacement in downward direction with respect to packers. Upper movable rod is provided with radial channel sealed with packer and adapted to cooperate with ambient space through hollow filter during movable rods displacement in downward direction with respect to packers.
EFFECT: simplified structure, decreased costs of device production and increased operational reliability.
FIELD: hydro-geological well research, in particular, engineering of equipment for taking liquid samples from wells of various level depths.
SUBSTANCE: device includes rod with diaphragms in form of plugs, cylinder-shaped body with drain ports. Body is mounted on external side of upper diaphragm with possible longitudinal movement relatively to the rod. From above body is provided with hydraulic chamber with a wall. Hydraulic chamber from above is connected to pipes column. Piston, spring-loaded from below and hermetically enveloping the rod, is mounted inside hydraulic chamber. Circular recesses narrowing towards the top are made on external surface of rod above diaphragms, with distance between them equal to distance between diaphragms. Analogical circular recesses, narrowing towards bottom and equipped with stopper rings, are made on internal surface of wall and piston. Stopper rings are made with possible interaction with circular recesses of rod. From below the body is equipped with tail piece with longitudinal side channels. From below hydraulic chamber is equipped with technological apertures.
EFFECT: increased reliability and division quality of samples taken.
FIELD: oil and gas industry, possible use for taking samples of liquid from pipelines.
SUBSTANCE: device contains main pipeline, sample-taking section, fastened to main pipeline with possible extraction of sample with enveloping of transverse cross-section of liquid flow without losses, draining valve and manometer. Sample-taking section at input of liquid flow inside the main pipeline is provided with branch pipe with radial apertures, positioned in front of liquid flow with inclined upper end. Cut of inclined end is positioned on the side of branch pipe opposite to radial apertures. Device, narrowing the flow, is mounted behind branch pipe in main pipeline. Draining valve is made in form of core slide valve, spring-loaded relatively to sample-taking section, body with draining aperture and coil. Core slide valve is hermetically mounted inside the body and made of dielectric material. Coil is positioned on external surface of body. In original position core slide valve hermetically covers draining port of body. In working position core slide valve under effect of electromagnetic field, created by coil, is capable of axial movement inside the body.
EFFECT: simplified construction, increased durability.
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.
FIELD: hydro-geological well research.
SUBSTANCE: device has cable suspension, rod with diaphragms in form of plugs, cylindrically shaped body, mounted on external side of upper diaphragm with possible longitudinal movement. A stop is provided on exterior of rod from above. Between aforementioned stop and diaphragm on external surface of rod circular recesses are made, which in terms of amount and distance between one another are equal to amount of diaphragms and distance between diaphragms. Body is provided with apertures in upper section, which from outside are closed by bushing spring-loaded upwardly, made with possible limited downward movement and provided with circular recess. Aforementioned spring in lower part is abutted against external circular recess of body. Balls are mounted in apertures of body, in transport position interacting with circular recesses of rod and with internal surface of bushing, and in working position - with external surface of rod and with circular recess of bushing. In upper section of body, cylindrical chamber is mounted with technological recess outside, connected from above to cable suspension, below which technological apertures are made, and from below - to rod with possible limited upward movement. Outside the chamber, a barrel is mounted with spring localizers and a pin interacting with recess. Barrel is made with possible interaction with bushing in working position, and rod is provided with channel, connecting internal hollows of body and chamber. Recess is made in form of longitudinal grooves successively extended in downward direction and connected by profiled groove.
EFFECT: increased reliability and sample separation quality.
2 cl, 2 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