SU832058A1

SU832058A1 - Apparatus for determining sedimentation resistance of high-composition suspensions

Info

Publication number: SU832058A1
Application number: SU782685079A
Authority: SU
Inventors: Виктор Сергеевич Пупков; Валерий Павлович Гнездов
Original assignee: Сахалинский Государственныйнаучно-Исследовательский И Проектный Институт Нефтянойпромышленности
Priority date: 1978-11-16
Filing date: 1978-11-16
Publication date: 1981-05-23

Description

Изобретение относится к нефтяной' и газовой промышленности·, в частнос ти, к устройствам для определения седиментационной устойчивости высококонцентрированных суспензий.The invention relates to the oil and gas industry, in particular, to devices for determining the sedimentation stability of highly concentrated suspensions.

Известно устройство для определения седиментационной устойчивости суспензий, содержащее рабочий цилиндр в котором устойчивость определяют .путем отстаивания суспензии в' цилиндре.[1).A device for determining the sedimentation stability of suspensions containing a working cylinder in which the stability is determined by settling the suspension in a 'cylinder. [1).

Недостатком известного устройства является то, что при оседании твердой фазы она зависает на внутренней поверхности цилиндра. 15A disadvantage of the known device is that when the solid phase settles, it hangs on the inner surface of the cylinder. fifteen

Известно также устройство для определения седиментационной устойчивости высококонцентрированных суспензий, содержащее стакан с жидкостью затворения и расположенный в нем стек-20 лянный цилиндр с дном-фильтром, поплавком и балластом, который удержива ется во взвешенном, состоянии в емкосидентичной ти, заполненной жидкостью, жидкости затворения [2] ,A device is also known for determining the sedimentation stability of highly concentrated suspensions, containing a glass with a mixing liquid and a glass cylinder located in it with a filter bottom, a float and ballast, which is held in suspension, in a capacitive, filled liquid, mixing liquid [ 2]

Однако это устройство не обеспечивает протекание седиментации в чистом' виде, поскольку тарировка данного устройства состоит в том, · что сбрасыванием балласта доводят глубину погружения рабочего цилиндра в жидкость емкости на какую-то глубину h (примерно 1/3 его общей высоты), равную последующему заполнению цилиндра испытуемой суспензией при определении ее устойчивости.However, this device does not ensure the flow of sedimentation in its pure form, since the calibration of this device is that · by dropping the ballast, the depth of immersion of the working cylinder in the liquid of the vessel is brought to some depth h (approximately 1/3 of its total height), equal to the following filling the cylinder with a test suspension to determine its stability.

И при испытании суспензии ее зали- . вают в рабочий цилиндр прямо на днофильтр. В результате при погружении седиментометра на глубину Н давление столба испытуемой суспензии уравновешивает неполное давление этого столба, а лищь -часть , равную Н - h, поскольку на глубину (h) седиментометр погружается и без испытуемой суспензий.And when testing the suspension, it was flooded. They are inserted into the working cylinder directly onto the bottom filter. As a result, when the sedimentometer is immersed to a depth of H, the column pressure of the test suspension balances the incomplete pressure of this column, and the lichen is the part equal to H - h, since the sedimentometer is immersed to the depth (h) without the suspension being tested.

При этом даже в начальный момент заливки, когда твердая составляющая находится во взвешенном состоянии, на фильтре снизу возникает дополнительное давление и данные по водоотстою при седиментации с дополнительным внешним фактором не обеспечивают точного отражения протекания процесса.Moreover, even at the initial moment of pouring, when the solid component is in suspension, additional pressure arises from the bottom of the filter and the data on the sump during sedimentation with an additional external factor do not provide an accurate reflection of the process.

Цель изобретения - повышение точности определения, за счет обеспечения возможности установки дна-фильтра на уровне жидкости затворения.The purpose of the invention is to increase the accuracy of determination, by making it possible to install the bottom of the filter at the level of the mixing liquid.

.Поставленная цель достигается тем, что дно-фипьТр установлен выше поп832058 лавка и балласта с возможностью фиксированного перемещения вдоль оси цилиндра.. This goal is achieved by the fact that the bottom-rig is installed above the pop832058 bench and ballast with the possibility of a fixed movement along the axis of the cylinder.

После такой тариров.ки при заполнении рабочего цилиндра ‘седиментометра испытуемой суспензией, давление, создаваемое столбом этой суспензи» на дно-фильтр, точно уравновешивается выталкивающей силой (в момент после заливки).After such calibration when filling the working cylinder ‘of the sediment meter with the test suspension, the pressure created by the column of this suspension on the bottom of the filter is precisely balanced by the buoyancy force (at the moment after filling).

На чертеже показано предлагаемое устройство.The drawing shows the proposed device.

Рабочий цилиндр 1 с дном-фильтром 2, имеющим перфорированную втулку 3 и пластинчатые пружины 4, перемеща.ется в перфорированном корпусе 5 и' фиксируется пружинными штифтами 6 в . таком положении, чтобы при выбранной величине балласта 7 седиментометр при погружении в жидкость. 8 емкости 9 , удерживаемый поплавком 10, касаясь дном-фильтром уровня жидкости в емкости . ,The working cylinder 1 with a filter bottom 2 having a perforated sleeve 3 and leaf springs 4 is moved in the perforated housing 5 and is fixed with 6 spring pins. such a position that at a selected ballast value of 7 sedimentometer when immersed in liquid. 8 of the tank 9, held by the float 10, touching the bottom of the filter with the liquid level in the tank. ,

Устройство работает следующим Образом.The device operates as follows.

При заливке в седиментометр испытуемой суспензии 11 и опускании его в емкость седиментометр погружается в жидкость затворения до такого уровня, при котором Ътолб воды за седиментометром (от дна-фильтра и выше) точно уравновешивает столб испытуемой суспензии.When pouring the test suspension 11 into the sedimentometer and lowering it into the tank, the sedimentometer is immersed in a mixing liquid to a level at which the water column behind the sedimentometer (from the filter bottom and above) precisely balances the column of the tested suspension.

Пространство в корпусе (от днафильтра и ниже) из-за наличия в нем отверстия заполняется водой затворения.The space in the housing (from the bottom filter and below) due to the presence of a hole in it is filled with mixing water.

В устройстве в начальный момент давление на фильтре- равно нулю и седиментация в суспензии происходит только под действием веса твердой составляющей раствора. В дальнейшем $ при зависании суспензии на стенках цилиндра падение парового давления уравновешивается противодавлением, возникающим на дне-фильтре со стороны жидкости и седиментация протекает в 10 чистом виде.In the device at the initial moment the pressure on the filter is zero and sedimentation in suspension occurs only under the influence of the weight of the solid component of the solution. Subsequently, when the suspension hangs on the cylinder walls, the drop in vapor pressure is balanced by the counterpressure arising on the bottom of the filter from the liquid side and sedimentation proceeds in a pure state.

По истечении определенного времени замеряется водоотстой 12 в рабочем цилиндре.After a certain time, the sump 12 is measured in the working cylinder.

Claims

The invention relates to the oil and gas industry, in particular, to devices for determining the sedimentation stability of highly concentrated suspensions. A device for determining the sedimentation stability of suspensions is known, which contains a working cylinder in which stability is determined by settling the suspension in a cylinder. 1). A disadvantage of the known device is that when a solid phase is deposited, it hangs on the inner surface of the cylinder. It is also known a device for determining the sedimentation stability of highly concentrated suspensions containing a container with a mixing fluid and a wall-mounted cylinder with filter bottom, float and ballast that is kept suspended, in a container filled with liquid, identical to a liquid. gate 2, However, this device does not ensure the flow of sedimentation in its pure form, since the calibration of this device consists in the fact that by dropping the ballast the working depth into the liquid of the container at some depth h (approximately 1/3 of its total height), which is equal to the subsequent filling of the cylinder with the test suspension in determining its stability. And when the suspension is tested, it is poured into the working cylinder directly on the bottom filter. As a result, when the sedimentometer is immersed to a depth H, the pressure of the column of the tested suspension balances the partial pressure of this column, and only a part equal to H is h, because the sedimentometer also sinks to a depth (h) without the tested suspensions. At the same time, even at the initial moment of pouring, when the solid component is in a suspended state, additional pressure arises on the filter from the bottom and due to water drainage during sedimentation with an additional external factor, they do not provide an exact fit of the process. The purpose of the invention is to improve the accuracy of determination, by allowing the installation of a bottom filter at the level of the mixing fluid. The goal is achieved by the fact that the bottom is set above the float and ballast with the possibility of fixed movement along the axis of the cylinder. After such a calibration, when the working cylinder of the sedimentometer is filled with the tested suspension, the pressure created by the column of this suspension on the bottom filter is precisely balanced by the pushing force (at the moment after pouring). , The drawing shows the proposed device. The slave cylinder 1 with the bottom filter 2, the perforated bushing 3 and the leaf springs 4, is displaced in the perforated casing 5 and fixed with spring pins 6 in such a position that when the ballast 7 is selected, the sedimentometer is immersed in the liquid. 8 of the tank 9 held by the float 10, touching the bottom filter of the oil level in. The device operates as follows. When the tested suspension 11 is poured into the sedimentometer and the sedimentometer is lowered into the container, the sedimentometer is immersed in the fluid to such a level that the water column behind the sedimentometer (from the bottom of the filter and above) exactly balances the column of the tested suspension. The space in the housing (from the bottom of the filter and below) due to the presence of a hole in it is filled with mixing water. In the device, at the initial moment, the pressure on the filter is zero and sedimentation in the suspension occurs only under the influence of the weight of the solid component of the solution. Subsequently, when the suspension hangs on the cylinder walls, the drop in vapor pressure is balanced by the counterpressure that occurs on the bottom of the filter from the liquid and sedimentation proceeds in its purest form. After a certain time has elapsed, water drainage 12 in the working cylinder is measured. Apparatus of the Invention A device for determining the sedimentation stability of highly concentrated suspensions, containing a glass with a mixing fluid, and a glass cylinder with a bottom filter, float and ballast located therein, in order to improve the determination accuracy by ensuring that the bottom filter is installed the shutter fluid level, the bottom filter is installed above the float and the ballast with the possibility of fixed movement along the axis of the cylinder. Sources of information taken into account in the examination 1.Vulatov A.I. Technology cementing oil and gas wells. M., Nedra, 1973, p.56.

2. USSR author's certificate number 560970, cl. E 21 V 33/138, 1975.