SU615200A1

SU615200A1 - Device for hydrodynamic investigation of wells

Info

Publication number: SU615200A1
Application number: SU701499119A
Authority: SU
Inventors: Виталий Семенович Гриб; Александр Алексеевич Кольцов
Original assignee: Уфимский Нефтяной Институт
Priority date: 1970-12-07
Filing date: 1970-12-07
Publication date: 1978-07-15

Description

(54) УСТРОЙСТВО ДЛЯ ГИДРОДИНАМИЧЕСКИХ ИССЛЕДОВАНИЙ СКВАЖИН(54) DEVICE FOR HYDRODYNAMIC RESEARCH OF WELLS

Изобретение относитс к области дистанционного контрол глубинных параметров в скважинах, а именно к дистанционному измерению забойных давлений и расхода .The invention relates to the field of remote monitoring of depth parameters in wells, namely to remote measurement of downhole pressures and flow.

Известны устройства дл измерени глубинных параметров: давлен , расхода, температуры и влагосодержани , состо щие из многовитковой геликоидальной пружины, заторможенной турбинки, коакси ального конденсатора, терморезистора и генераторов измен ющейс частоты с усилител ми L-Lj .Devices are known for measuring depth parameters: pressure, flow, temperature and moisture content, consisting of a multi-turn helicoidal spring, braked impeller, a coaxial capacitor, a thermistor and variable frequency generators with amplifiers L-Lj.

Недостатками этих устройств вл ютт с наличие в глубинном снар де большого числа активных элементов, понижающих надежность работы устройства, а также возможность лищь поочередного измерени контролируемых параметров.The disadvantages of these devices are the presence in the depth of the shell a large number of active elements, which reduce the reliability of the device, as well as the possibility of alternately measuring the monitored parameters.

Известно также устройство дл гидродинамических исследований скважин, со . держащее датчик давлени , св занный с фотоэлектрическим преобразователем, выполненным в виде двух полудисков и экрана , который соединен с приводом 2 . It is also known a device for hydrodynamic studies of wells, with. a holding pressure sensor associated with a photoelectric converter made in the form of two half disks and a screen that is connected to the drive 2.

В этом устройстве изменение забойного давлени вызывает относительное перемещение экранов фотоэлектрического преобразовател , с помощью которого измер емое давление преобразуетс во временной интервал. Приводом фотоэлектрического преобразовател служит синхронный электродвигатель .In this device, the change in the downhole pressure causes a relative movement of the screens of the photoelectric converter, with which the measured pressure is converted into a time interval. The photoelectric converter drive is a synchronous electric motor.

Недостатком известного устройства вл етс невозможность одновременного измерени двух параметров.A disadvantage of the known device is the impossibility of simultaneously measuring two parameters.

Heiaf изобретени - упрощение устройства при обеспечении одновременного измерени расхода и давлени .The Heiaf of the invention is a simplification of the device while ensuring simultaneous measurement of flow and pressure.

Цель достигаетс тем, что привод выполнен в виде незаторможенной турбинки первичного преобразовател расхода.The goal is achieved by the fact that the drive is made in the form of an unbraked turbine of the primary flow converter.

На чертеже изображена принципиальна конструктивна схема предлагаемого устройства .The drawing shows a schematic structural diagram of the proposed device.

Claims

In the case of a deep shell, a pressure sensor is placed in the form of a helicoidal spring 1 with a bellows 2, an immobilized impeller 3 of the primary transducer and the photovoltaic pre. the former, blasted from the light source 4, the opaque screens 5-7, the FSK resistor 8 and the permanent magnets 9 and ib. Screens 5 and 6 represent a half-deck, screen 7 is a disk with a hole located against the photosensitive layer of the photo-transistor. The slave magnet 9 and the screen 7 are fixed on a common device operates as follows. The measured pressure through the bellows 2 acts on the helicoidal spring 1. The screen 5, rigidly connected to the free end of the helicoidal spring 1, is rotated relative to the fixed screen 6 by an angle proportional to the measured pressure, i.e. between the faces of screens 5 and 6, an angle is formed that is proportional to the pressure being measured (clearance angle). The impeller 3 rotates at a rate proportional to the flow rate of the fluid. The rotation of the impeller is transmitted by means of magnets 9 and 10 to screen 7. Light source 4 illuminates the photoresistor 8 when the hole in screen 7 is under the gap between the faces of screens 5 and 6. The time of the illuminated state of photo lamp 8 depends on two parameters: the magnitude of the clearance angle (pressure) and the speed of passage of this angle by the pickup of the screen 7 (flow). Thus, measuring the frequency of the illumination of the photoresistor can determine the rotational speed of the impeller (flow), according to the time of illumination of the photoresistor with a consideration of the angular velocity of the impeller - the angle of the light (pressure). Consequently, the use of an unbraked impeller as a drive from an electric transducer allows the simultaneous measurement of pressure and flow, minimizes the number of elements of the depth gauge and significantly increases the productivity of labor in the production of oilfield measurements. The invention The device for hydrodynamic studies of wells, containing a pressure sensor associated with a photoelectric converter, made in the form of two half-disks and a screen that is connected to the drive, so that, in order to simplify device while ensuring simultaneous measurement of flow, the drive is implemented in the form of an unbraked turbine of the primary flow converter. Sources of information taken into account in the examination: 1. Petrov A. I. Methods and measurement techniques in field research wells. M., Nedra, 1972, p. 219-224

2. A. A. Koltsov, V. S. Grib, and V. V. Safonov, Photoelectric Converter for Remote Depth Instruments. Limes of higher educational institutions, Oil and gas series, M 2, 197O, p. 89-9O.