SU839448A3 - Устройство дл исследовани скважинныхфОРМАций - Google Patents

Устройство дл исследовани скважинныхфОРМАций Download PDF

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SU839448A3
SU839448A3 SU731978257A SU1978257A SU839448A3 SU 839448 A3 SU839448 A3 SU 839448A3 SU 731978257 A SU731978257 A SU 731978257A SU 1978257 A SU1978257 A SU 1978257A SU 839448 A3 SU839448 A3 SU 839448A3
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line
valve
tool
pressure
formation
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SU731978257A
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Г.Дж Урбаноски
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Шлюмбергер Оверсиз С.А. (Фирма)
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/10—Obtaining fluid samples or testing fluids, in boreholes or wells using side-wall fluid samplers or testers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41572—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and an output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/555—Pressure control for assuring a minimum pressure, e.g. by using a back pressure valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/575—Pilot pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6653—Pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7055—Linear output members having more than two chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7107—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being mechanically linked
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7716—Control of direction of movement of the output member with automatic return

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Electrotherapy Devices (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Piles And Underground Anchors (AREA)

Description

Изобретение относитс  к гидроприводам геологоразведочных приборов а именно к гидропроводам пробоотборников . Известно устройство дл  исследовани  скважинных формаций, включающе несколько автономных, последователь но установленных пробоотборников 1 Однако большой вес и длина данно го устройства ограничивают возможнос ти его использовани . Известно устройство дл  исследований скважинных формаций, включаюш. .скважинный снар д с гидроцилиндрами привода  кор щих средств и пробо отборником, гидравлически св занным с блокирующим клапаном, источник гидравлической энергии, св занный напорной и сливной магистрал ми с гидродилиндрами привода  кор щих средств и блокирующим клапаном, и пульт управлени , св занный с источником питани  2 . Цель изобретени  - повышение эффективности устройства. Эта цель достигаетс  тем, что устройство снабжено нормально-закрытым контрольным клапаном, вход которого св зан с напорной магистралью , а выход - с блокирующим клапаном , и двум  нормально-закрытыми клапанами, выходы которых св заны со сливной магистралью, вход одного с входом, а другого - с выходом нормально-закрытого контрольного клапана. На фиг. 1 показано положение устройства в скважине; на фиг. 2 и 3 - гидравлическа  схема устройства в исходном положении; на фиг. 4 - В - последовательность положений элементов устройства при отборе пробы; на фиг. 9-11 последовательность положений элементов устройства при возврате в исходное положение. Устройство состоит из пульта 1 управлени  с записывающей и показывающей аппаратурой, соединенного с источником питани , источника 2 гидравлической энергии, выполненного в виде емкости 3 с подпружиненным разделительным поршнем 4, надпоршнева  полость 5, которой сообщена магистралью 6 со скважинкой жидкостью на уровне отбора пробы, а в подпоршневой полости 7 расположены насос 8 с электродвигателем 9. К полостй 7 подход т сливна  10 и подпорна  И магистрали , а от насоса 8 отход т напорна  магистраль 12 ра бочего хода и магистраль 13 обратного хода и подвешенного на кабеле 14 в скважине 15 скважинного снар д 16, Последний содержит емкости 17 и 18 дл  проб, пробоотборник 19 и ;гидроцилиндры 20 - 23 привода  кор  щих средств. Пробоотборник 19 представл ет собой телескопический гидроцилиндр с полост ми 24 - 27, внутренний што . 28 которого выполнен с каналом 29, сообщенным с магистралью 30, .св зан через снабженные подпружиненными поршн ми клапаны 31-34 с емкост ми 17 и 18. Магистраль 30 магистралью 35 св зана о клапаном 36, снабженны подпружиненным поршнем. Магистраль 12 св зана с входом нормально-закры того контрольного клапана 37,состо  щего из корпуса 38 с седлом, иглы 39,поршн  40 и пружин 41 и 42, выход которого св зан магистралью 43 с нормально-закрытым клапаном 44 состо щим из корпуса 45 с седлом, иглы с поршнем 46 и пружины 47, выход которого св зан с сливной магистралью 10.Вход клапана 37 св за с входом нормально-закрытого клапан 48, выход которого св зан со сливно магистралью 10. Клапан 48 выполнен аналогично клапану 44. Полости 27 и 24 пробоотборника 19 соединены через клапан 49, выполненный аналогично клапану 37. Цилиндры 20 - 23 св заны штоковыми полост ми с магистралью 13, а поршневыми - с магистралью 12. Полость 25. пробоотборника 19 св зана с магистралью 12 а полость 24 с магистралью 13. Поршневые полости клапанов 37, 44, 48 49 св заны с магистралью 11. Штоковые полости клапанов 37, 49 и 36 св заны ,с магистралью 12. По.ршнева  полость клапана 36 и штоковые полости клапанов 44 и 48 св заны с магистралью 13. Поршневые полости клапанов 31, 34 через обратные клапаны 50, 52 и подпорные клапаны 51, 53 св заны с магистралью 43, а их штокова  полость - с магистралью 13 Поршневые полости клапанов 32 и 33 св заны с магистралью 13, а их штоковые полости через электроуправ л  емые запорные клапаны 54 и 55 с магистралью 43. Магистраль 12 снабжена предохранительным клапаном 56, обратным клапаном 57 и электро управл емым запорным клапаном 58, магистраль 13 - предохранительными клапанами 59, 60, и электроуправл е мым запорным клапаном 61, а магистрал 10 - электроуправл емым запорным клапаном 62. Устройство работает следующим образом. Скважинный снар д 1 на кабеле 14 опускают лебедкой в скважину-до исследуемого горизонта. Клапан 34 открыт и магистраль 30 от полости 29 до клапана 31 находитс  под гидростатическим давлением .скважинной жидкости . Включаетс  насос 8 и клапан.ами 58, 61 и 62 обеспечиваетс  подача рабочей жидкости под давлением в магистраль 12, и соединение магистрали 13 с магистралью 10.Гидроцилиндры 20 - 23 вибрируют и расклин ют скважинный снар д 1 в скважине, шток 28 пробоотборника 19 входит в контакт со стенкою скважины 15, а поршень клапана 36 подниметс , после чего давление в магистрали 12 возрастает, открываетс  клапан 49 и соедин ет полость 27 пробоотборника 19 с магистралью 13, в результате чего шток 28 пробоотборника вт гиваетс  и скважинна  жидкость промывает его-канал 29. После достижени  штоком 28 крайнего положени  давление в магистрали 12 возрастает и клапан 37 о.ткрываетс , вследствие чего клапан 34 закроетс , прекратив скважйнной жидкости доступ в магистраль 30, а клапан 31 откроетс  и реликтова  жидкость-из части стенки скважины , изолированной пробоотборником, поступит в магистраль 30 , что видно по давлению в магистрали 30, которое измер етс  датчиком давлени . С пульта 1 подаетс  команда на переключение клапана 54, который пропускает рабочую жидкость из магистрали 43 в штоковую полость клапана 32, он открываетс , и реликтова  жидкость поступает в емкость 17. При необходимости заполн етс  и емкость 18. Дл  подъема скважинного снар да на поверхность или перемещени  его на другой горизонт включаетс  насос 8, и клапанами 61 к 62 обеспечиваетс  подача рабочей жидкости под давлением в магистраль 13, а магистраль 12 перекрыв аетс  клапаном 58. Рабоча  жидкость, поступа  в штоковую полость клапана 44, открывает его, сообща  магистраль 43 с магистралью 10, после чего клапан 37 закрываетс , сохран   в магистрали 12 давление , достаточное дл  поддержани  цилиндрами 20 - 23 контакта со стенками скважины.Клапан 32 закрываетс  и запирает емкос ть 17. Переключением предохранительных клапанов 59 и 60 обеспечиваетс  повышение давлени  в магистрали 13, и клапан 34 открываетс . При дальнейшем увеличении давлени  открываетс  клапан 48 и гидроцилиндры 20-23 и пр.обоотборник 19 возвращаютс  в исходное положение. При дальнейшем повышении давлени  клапан 58 пропускает рабочую жидкость из магистрали 13 в поршневую полость клапана 31,.и он закрываетс .
Последовательность срабатывани  клапанов в зависимости от давлени  развиваемого насосом обеспечиваетс  подбором их пружин. Таким образом, можно вз ть несколько проб, не извлека  с кважинный снар д из скважины и контролиру  его работу.

Claims (3)

1.Патент США № 3385354,кл.165-97, опублик. 1970.
2.Патент США № 3577781,кл.73-152, опублик. 1970.
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SU731978257A 1972-12-08 1973-12-07 Устройство дл исследовани скважинныхфОРМАций SU839448A3 (ru)

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