US2223785A - Gas sampling system - Google Patents

Gas sampling system Download PDF

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Publication number
US2223785A
US2223785A US246835A US24683538A US2223785A US 2223785 A US2223785 A US 2223785A US 246835 A US246835 A US 246835A US 24683538 A US24683538 A US 24683538A US 2223785 A US2223785 A US 2223785A
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US
United States
Prior art keywords
bag
gas
space
tube
sample
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US246835A
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English (en)
Inventor
Gerald L Hassler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Development Co
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Shell Development Co
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Filing date
Publication date
Application filed by Shell Development Co filed Critical Shell Development Co
Priority to US246835A priority Critical patent/US2223785A/en
Priority to GB32418/39A priority patent/GB537380A/en
Priority to FR862396D priority patent/FR862396A/fr
Priority to NL96323A priority patent/NL52188C/xx
Application granted granted Critical
Publication of US2223785A publication Critical patent/US2223785A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
    • G01V9/007—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by detecting gases or particles representative of underground layers at or near the surface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state

Definitions

  • stances such as oil, in certain formations are derived from the analysis of gases drifting by diffusion upwards to the surface of the ground. It is known that when samples of such gases are collected from a plurality of stations gradually 5 approaching an oil deposit from any direction on the surface of the ground, the amount of gaseous hydrocarbons, and the ratio of ethane and higher hydrocarbons to methane in said soil gases also gradually increases owing to the fact that the higher hydrocarbons diffuse through the soil layers at a slower rate than methane.
  • the concentration of the hydrocarbons in the samples obtained is exceedingly small, amounting, for example, to about 3 to 300 parts per million, it is obvious that extremely accurate methods must be used in obtaining, storing and analyzing said soil gases to obtain data of any value from an exploration standpoint.
  • a suitable method and apparatus for obtaining soil gas samples is described in my application Serial No. 190,473, filed February 14, 1938, and a suitable method and apparatus for analyzing said samples is described in my application Serial No. 237,914, filed October 31, 1938.
  • the object of the present invention is to provide a suitable storage system for samples of gas obtained underground, said system comprising double-walled containers constructed in such a contamination of the samples due to leakage, diffusion or adsorption phenomena.
  • Fig. 1 is a'diagrammatical side-elevation view manner and of such materials as to avoid the in cross-section of a preferred embodiment of this invention
  • Fig. 2 is a front elevation view of the same device drawn to a smaller scale
  • Fig. 3 is a plan view of the valve plate 6 shown in Figs. 1 and 2;
  • Fig. 4 is a flow diagram schematically showing the method of filling the device of Fig. 1 with a sample of underground gas;
  • Fig. 5 is a flow diagram showing the method of delivering a gas sample held in the device of Fig. l to an analytical apparatus;
  • Fig. 6 is a diagrammatical elevation view in cross-section of another preferred embodiment of thisinvention.
  • Fig. 7 is a flow diagram schematically showing the method of filling the device of Fig. 6 with a sample of underground gas.
  • Fig. 1 shows diagrammatically and in crosssection one preferred embodiment of the invention, which comprises a double-walled, flexible bag, having an outer envelope 3 and a concentric inner envelope 5.
  • This bag is, made of material having a very small permeability and no tendencies for adsorption or exhalation of hydrocarbon gases. It has been found that Cellophane is especially suitable for this purpose. Cellophane, which is marketed in the form of tubular rolls, may be conveniently cut into tubular sections of any desired length.
  • Two such tubular sections inserted into one another, have their upper and lower ends clamped between an inner metallic stem l, and an outer metallic member 2, which is bent to a near-annular shape around the stem I, whereby an air-tight fit is insured without the use of any glue, cement or other material capable of contaminating the gaseous contents of the bags by exhalation of impurities.
  • Both the inner and theouter bags are in communication with the outside by means of a valve structure comprising a metallic plate 6. Openings 1' and TA are drilled through plate 6, and are of an enlarged diameter 8 on the side facing the bag. The walls of the openings 8 are screwthreaded and adapted to receive plugs l 0 and IOA, provided with central passages corresponding to the openings 1 and IA.
  • a circular hole is punched in the outside wall 3 of the flexible bag and the edges of the wall around said hole are caught in air-tight manner between the plate 6 and. the nut Ill, screwed into opening 8 of said plate.
  • a second hole is punched through bothwalls 3 and 5 of the bag, and the edges of said walls are secured to the plate 6 in the same manner by means of plug IDA.
  • Plate 6 may be amxed, for example, by means of screw M, to a panel l5, having passages l6 and i1 communicating between the openings 1 and 1A of the plate, and pipes 20 and 20A, or 2
  • Pins 9 and 9A are afi'ixed to the panel
  • 2A having no rubber parts, and requiring no lubrication (either of which might contaminate the sample due to a possible exhalation of hydrocarbons) are held in a normally closed position within passages 1 and 7A between plugs I0 and IBA and the plate 6.
  • the pins 9 and 3A press against the flap-valves l2 and
  • the following procedure may be followed in filling the present bag container with gases obtained underground, and in subsequently delivering said gases to an analytical apparatus.
  • the container is first attached, by means of plate 6 and screw I4, to the panel I5 in such a manner that the inside of the bag 3 is in communication with pipe 20, and the inside of bag 5 with pipe 23A.
  • Pipes 20 and 20A form part of a soil gas sampling apparatus such as described in my application Serial No. 190,473,. filed February 14, 1938, pipe 20 leading to a guard ring space between packers 38 and 39 of a probing borehole, and pipe 23A leading to a space 4
  • Pipe 29 is provided with a pump 33, and pipe 211A with a pump 34, which are preferably of the auto-pulse metal-bellows type, which do not require any lubrication, whereby contamination of the sample is avoided.
  • the intake of pump 33 is connected with the pipe 20A by a pipe 35 provided with a valve 32.
  • opens to the atmosphere between the pump 33 and the bag 3.
  • valve 32 With valve 32 closed and valve 3
  • 2A are automatically closed.
  • the sample obtained in this manner may be left in the present container for a considerable length of time, no contaminations by difiusion of atmospheric air through the elastic partitions being possible, since the space within the inner concentric bag 5, containing the sample to be analyzed, is separated from the atmospheric air by the space within the outer concentric bag 3, filled with substantially the same gaseous mixture as bag 5.
  • the gas bag When it is desired to analyze the gas sample, the gas bag is affixed, by means of the plate 6 and a screw MA, to the same or a different panel
  • is connected to a pump 33A, having an intake open to the atmosphere, while pipe 2
  • valve 32A and pumpin air into the bag 3 the gas sample is forced out of the inner bag into the analytical apparatus.
  • the amount of contamination by diffusion which occurs during this operation due to the presence of atmospheric air in the outer bag 3 is negligible in view of the relatively short duration of said operation.
  • the containers described above have the advantage of being well suited for operation in the field, being made of resilient material and therefore unbreakable.
  • Another preferred type of the present containers may likewise be used, wherein only one of the double walls is made of Cellophane, while the other is made of glass.
  • This type of container is preferable for operation under conditions of a very dry atmosphere, which sometimes may resuit in the cracking and leakage of the double- Walled Cellophane bag.
  • a section of tubular Cellophane 5 is inserted within a glass cylinder 3A, approximately 20 inches long and having a diameter of about 2 inches.
  • the ends are sealed by turning the Cellophane over to the outside to make a tight fit against the fire-polished edges of the glass tube.
  • the space inside the Cellophane is then sealed, at the lower end, by a brass plate 5
  • the space within the Cellophane bag communicates with the outside by means of a conduit 54, fitted through plate 5
  • a suitable stopper such as a rubber ball 53
  • the tubes 54 and 55 are led into a bushing structure or chamber comprising a rigid metallic or glass tube portion 63 and a rubber tube portion 6
  • This bushing is closed at either end in air-tight fashion by stoppers 63 and 34, made of suitable materials such as rubber, tubes 54 and 55 passing through stopper 63, a tube or orifice 23, and a tube 23a, respectively, similar to tubes 20 and 23A of Figs. 4 and 5 passing through stopper 34.
  • Tubes 54 and 55 are provided with nipples 65 and 61, whereby either of said tubes can be put in communication with tube 20A.
  • Fig. 7 shows the connections diagram used in filling this embodiment of the present gas container with an underground gas sample by means of the apparatus of my application Serial No. 190,473, filed February 14, 1938.
  • the tube 20, opening to the guard ring space 4!] is connected, by means of a tube 70, with a source of vacuum H, such, for example, as the pumps shown in Figs. 4 and 5 or as a jar partially filled with a liquid and connected by means of a flexible tube hi to another jar 13, the degree of vacuum in jar H being regulated by raising or lowering the jar 13.
  • a source of vacuum H such, for example, as the pumps shown in Figs. 4 and 5 or as a jar partially filled with a liquid and connected by means of a flexible tube hi to another jar 13, the degree of vacuum in jar H being regulated by raising or lowering the jar 13.
  • the tube 28A is then connected to the nipple 61, whereby vacuum is applied through the space within bushing (iii-4H to the guard ring space 40 and to the space between the glass tube 3A and the Cellophane 5, causing said Cellophane to adhere to the glass, whereby the Cellophane bag 5 is expanded, and gas from sample space H is drawn thereinto through tube 28A, nipple El and pipe 54.
  • the tube 29A is then disconnected frorn nipple 61 and connected to nipple 65, which can be easily effected by slightly stretching and twisting the elastic part 6
  • Vacuum is now applied through tubes 10, bushing 6iJ-6l, and tube 54, to the space within the Cellophane bag 5, causing said bag to collapse within the glass tube 3A, whereby the gas from the sample space 4
  • guard ring space 4! is directly in communication with the source of vacuum by means of tubes 10 and 2t, while the sample space 4
  • a gas sampling system two concentric envelopes one wholly within the other, said envelopes being sealed from each other and from the atmosphere, at least the inner envelope being made of flexible material, a conduit in communication with the inside of the inner envelope, 2. second conduit in communication with the inside of the outer envelope, and means for selectively applying to the other ends of said conduits a gaseous pressure, whereby either envelope may be filled by applying a vacuum to the other envelope, and may be emptied by applying a positive pressure to the other envelope.
  • two concentric flexible gas-impervious envelopes one wholly within the other, said envelopes being sealed from each other and from the atmosphere, at normally closed valve structure in communication with the inside of the inner envelope, a normally closed valve structure in communication with the inside of the outer envelope, two tubular conduits, means for clamping said tubular conduits in register with said valve structures, members rigidly affixed to said clamping means adapted to open said valves when said valves are clamped in register with said conduits, and means for selectively applying to the other ends of said conduits a gaseous pressure, whereby either envelope may be filled by applying a vacuum to the other envelope, and may be emptied by applying a posi tive pressure to the other envelope.
  • a rigid gas-tight tubular member a rigid gas-tight tubular member wholly within said rigid tubular member, sealing means forming a gas-tight bond between the rims of said tubular members at either end thereof, whereby an annular gas-tight space is formed between said tubular members, gas-tight means closing the open ends of said flexible tubular member, whereby a second gastight space is formed within said annular gastight space, a gas-tight chamber, a gas conduit in communication between said chamber and the annular space between the rigid and the flexible tubular members, a second gas conduit in communication between said chamber and the space within the flexible tubular member, a tube having an outer end immersed in the space from which the sample is collected and an inner end projecting into said chamber, said inner end being adapted for sealing engagement with either of the conduits opening to said chamber, an orifice through the walls of said chamber, and means for selectively filling the space on either end of said flexible envelope with a gaseous sample

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Sampling And Sample Adjustment (AREA)
US246835A 1938-12-20 1938-12-20 Gas sampling system Expired - Lifetime US2223785A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US246835A US2223785A (en) 1938-12-20 1938-12-20 Gas sampling system
GB32418/39A GB537380A (en) 1938-12-20 1939-12-18 Container for storing gas samples
FR862396D FR862396A (fr) 1938-12-20 1939-12-18 Récipient à stocker des échantillons de gaz
NL96323A NL52188C (enrdf_load_stackoverflow) 1938-12-20 1939-12-19

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US246835A US2223785A (en) 1938-12-20 1938-12-20 Gas sampling system
GB32418/39A GB537380A (en) 1938-12-20 1939-12-18 Container for storing gas samples

Publications (1)

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US2223785A true US2223785A (en) 1940-12-03

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US246835A Expired - Lifetime US2223785A (en) 1938-12-20 1938-12-20 Gas sampling system

Country Status (4)

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US (1) US2223785A (enrdf_load_stackoverflow)
FR (1) FR862396A (enrdf_load_stackoverflow)
GB (1) GB537380A (enrdf_load_stackoverflow)
NL (1) NL52188C (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063296A (en) * 1959-04-30 1962-11-13 William F Huch Air sampling system
US3085439A (en) * 1960-01-07 1963-04-16 Joy Mfg Co Gass sampling apparatus
US3106845A (en) * 1961-06-26 1963-10-15 Univ California Dilution pipette
US3635092A (en) * 1969-11-12 1972-01-18 Us Interior Manually operated gas sampler
US3866474A (en) * 1973-06-25 1975-02-18 Trw Inc Gas sample collecting device
US5437201A (en) * 1994-03-30 1995-08-01 Shell Oil Company Negative pressure gas sampling device
FR2787578A1 (fr) * 1998-12-16 2000-06-23 Pierburg Ag Dispositif et procede pour l'analyse de composants de gaz d'echappement
US6148914A (en) * 1996-10-09 2000-11-21 Schlumberger Technology Corporation Sampling hydrocarbons in a well using a flexible bag
EP0959339A3 (en) * 1998-05-12 2002-08-21 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas sampling apparatus
JP3530029B2 (ja) 1998-05-12 2004-05-24 本田技研工業株式会社 排気ガスサンプリング装置
CN104265283A (zh) * 2014-07-30 2015-01-07 太原理工大学 一种煤矿地面灭火钻孔孔底气样采集方法
CN104265283B (zh) * 2014-07-30 2017-01-04 太原理工大学 一种煤矿地面灭火钻孔孔底气样采集方法
CN109632403A (zh) * 2018-12-06 2019-04-16 成都华科阀门制造有限公司 一种气体采集装置

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063296A (en) * 1959-04-30 1962-11-13 William F Huch Air sampling system
US3085439A (en) * 1960-01-07 1963-04-16 Joy Mfg Co Gass sampling apparatus
US3106845A (en) * 1961-06-26 1963-10-15 Univ California Dilution pipette
US3635092A (en) * 1969-11-12 1972-01-18 Us Interior Manually operated gas sampler
US3866474A (en) * 1973-06-25 1975-02-18 Trw Inc Gas sample collecting device
US5437201A (en) * 1994-03-30 1995-08-01 Shell Oil Company Negative pressure gas sampling device
US6148914A (en) * 1996-10-09 2000-11-21 Schlumberger Technology Corporation Sampling hydrocarbons in a well using a flexible bag
JP3530029B2 (ja) 1998-05-12 2004-05-24 本田技研工業株式会社 排気ガスサンプリング装置
EP0959339A3 (en) * 1998-05-12 2002-08-21 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas sampling apparatus
FR2787578A1 (fr) * 1998-12-16 2000-06-23 Pierburg Ag Dispositif et procede pour l'analyse de composants de gaz d'echappement
CN104265283A (zh) * 2014-07-30 2015-01-07 太原理工大学 一种煤矿地面灭火钻孔孔底气样采集方法
CN104265283B (zh) * 2014-07-30 2017-01-04 太原理工大学 一种煤矿地面灭火钻孔孔底气样采集方法
CN109632403A (zh) * 2018-12-06 2019-04-16 成都华科阀门制造有限公司 一种气体采集装置
CN109632403B (zh) * 2018-12-06 2024-02-06 成都华科阀门制造有限公司 一种气体采集装置

Also Published As

Publication number Publication date
NL52188C (enrdf_load_stackoverflow) 1942-03-16
GB537380A (en) 1941-06-19
FR862396A (fr) 1941-03-12

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