SU573579A1

SU573579A1 - Strata tester

Info

Publication number: SU573579A1
Application number: SU7302000998A
Authority: SU
Inventors: Анатолий Михайлович Ясашин; Петр Афанасьевич Чуев
Original assignee: Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники
Priority date: 1973-12-14
Filing date: 1973-12-14
Publication date: 1977-09-25

Description

1one

Изобретение относитс к опробовател м пластов,.предназначенных дл исследовани скважин в процессе их бурени .The invention relates to reservoir testers that are designed to test wells during their drilling.

Известен опробователь пластов, вклю чакцций пробоотборник с подпружиненным золотниковым клапаном и камеру, заполненную тампонирующей смесью l.The reservoir tester is known, including a sampler with a spring-loaded slide valve and a chamber filled with plugging mix l.

Пакеровка исследуемого объекта этиь опробователем осуществл етс при помощи тампонирующей смеси, нагнетаемой на забой скважины. Добитьс герметичности опробуемого участка при таком способе пакеровки. практически невозможно . Кроме того, отбор пробы в кзвестном опробователе производитс из точечного участка забо , что не позвол ет получить значительный объем пластовой жидкости.Packing of the object under investigation is carried out by the tester with the help of a plugging mixture injected to the bottom of a well. Achieve tightness of the test area with this method of packing. almost impossible . In addition, sampling in a well-known tester is made from a point bottom, which does not allow for obtaining a significant amount of formation fluid.

Известен также опробователь пластов , включаюпщй корпус, герметизирующий элемент, подпружиненные втулки и пробоотборник, состо щий из выполненного с перегородкой корпуса с радиальными каналами и подпружиненного оолотникового клапана 2.A reservoir tester is also known, including a housing, a sealing element, spring-loaded bushings and a sampler, consisting of a housing made with a partition with radial channels and a spring-loaded niolotnik valve 2.

Недостатком известного опробовател пластов вл етс то, что подпружиненный золотниковый клапан его пробоотборника преп тствует при распакеровке герметизирующего элемента сообщению затрубного пространства над ним с внутренней полостью труб, на которых опробователь спускаетс в скважину. Это может привести к осложнени м при распакеровке и снижению эффективности работы опробовател пластов.A disadvantage of the known reservoir tester is that the spring-loaded spool valve of its sampler prevents, when unpacking the sealing element, the annular space above it with the internal cavity of the tubes, on which the tester descends into the well. This can lead to complications when unpacking and reduce the efficiency of the reservoir tester.

Целью изобретени вл етс повьшеНие эффективности работы опробовател путем выравнивани давлени в зонах под пакером, над пакером и внутри колонны бурильных труб.The aim of the invention is to increase the efficiency of the tester by equalizing the pressure in the areas under the packer, above the packer and inside the drill string.

Достигаетс это тем, что в корпусе пробоотборника выполнен дополнительный канал, в котором размещена нижн часть золотникового клапана.This is achieved by the fact that an additional channel is made in the body of the sampler, in which the lower part of the spool valve is located.

На фиг. 1 изобргшен опробователь пластов после спуска в него пакерующего устройства пробоотборника; на фиг. 2 - то же, в момент открыти камеры пробоотборника и сообщени ее с испытываемым пластом; на фиг. 3 - то же, в момент распакеровки и выравнивани давлени над пакером, под пакером и во внутренней полости колонг-ш труб.FIG. 1 is the formation tester after the sampler packer device has been lowered into it; in fig. 2 - the same, at the moment of opening the sampler chamber and communicating it with the test formation; in fig. 3 - the same, at the time of unpacking and equalizing the pressure above the packer, under the packer and in the internal cavity of the column tubes.

Claims

The reservoir tester consists of a lean device packaged into a drill string assembly and a sampler collected inside it. A spindle 2 with a sealing element 3 is attached to the housing 1 of the packer device. A sleeve 4 with a spring 5 and a sleeve 6 with a spring 7 are installed above and below the sealing element in the case. The sampler sampler consists of the case 8, the lower part of which is equipped with a filter 9, and the upper part, separated by a partition 10, is made in the form of a reservoir 11. In the case channels A, B and C are made, which open and close with a slide valve 12 with a spring 1 A st is installed between the case 8 of the sampler and the spool valve 12 Porous spring ring 14, In the thickened part of the body 8 of the sampler, a shaped channel is made in channel B, the upper part of which is blocked by the lower part of the spool valve 12 during transportation of the sampler through drill pipes and its lower part D The proposed reservoir tester works as follows. Packer. The device, which is part of the drill string, participates in the process of drilling a well. In order to take a sample of the reservoir fluid into the drill pipe, the sampler is lowered, which, after reaching the packer, sits on its bushings 4 and 6, compressing the springs 5 and 7. At this time, the spool valve 12 closes its channels A, R, C and D and channel D in sleeve 4 of the packer device. The upward movement of the spool valve under pressure from the spring 13 is limited by the retaining spring ring 14 ... When the pumps are turned on and the pressure inside the drill pipe is increased, the sealing element 3 is stretched and the borehole is sealed. With increasing pressure, the spool valve. 12, as hydraulically unbalanced, gradually descends, compressing the spring 13. When the spool valve 12 descends to stop, channels A and B in the probe body 8 communicate with each other and the formation fluid through the filter 9 and these channels will begin to flow into the container 11. Stop In this case, the ring 14 opens and falls into the groove of the spool valve 12. After completion of the sampling, the excess pressure inside the drill pipe is relieved. As a result, the spring 13 pushes the valve 12 upward, which will no longer be held by the spring ring 14, and rises up to the stop in the protrusion on the body 8 of the sampler. When the spool valve 12 moves upward, channels A and B, the sample compartment, will be closed first, and then channels C and D will open to communicate with channel D in sleeve 4 of the packer device. This will equalize the pressure above the sealing element, below it, and inside the drill pipe string. If necessary, channels B, D and D can be used for flushing wells with mud. Claims of formations, comprising a housing, a sealing element, spring-loaded bushings and a sampler consisting of a housing with radial channels and a spring-loaded spool valve, characterized in that, in order to increase its efficiency by equalizing the pressure in the areas under the packer, above the packer and inside the drill pipe string, an additional channel is made in the sampler housing, in which the lower part of the spool valve is located. Sources of information taken into account in the examination: 1. USSR author's certificate number 177810, cl. E 21 V 49/00, 1962.

2. USSR author's certificate number 317783, cl. E 21 V 49/00, 1968.