SU866122A1

SU866122A1 - Apparatus for drilling boreholes

Info

Publication number: SU866122A1
Application number: SU792704784A
Authority: SU
Inventors: Станислав Васильевич Соломенников; Анатолий Георгиевич Калинин; Павел Дмитриевич Алексеев; Борис Анатольевич Коснырев; Мидхат Назифилович Сафиуллин; Василий Петрович Яньшин; Таглат Назметдинович Бикчурин; Владимир Иванович Кузьмин
Original assignee: Центральная научно-исследовательская лаборатория Производственного объединения "Оренбургнефть"; Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники
Priority date: 1979-01-02
Filing date: 1979-01-02
Publication date: 1981-09-23

Description

Изобретение относитс к буровой технике, а именно к устройствам дл бурени скважин с обратной пром1ывкой.The invention relates to a drilling technique, namely, backhole drilling devices.

Известно устройство дл бурени скважин, содержащее корпус,породоразрушающий инструмент с калиброванными отверсти ми, эжектор, полости высокого и низкого давлени которого через калиброванные отверсти сообщены с полостью под инструментом, и бурильную колонну СоA device for drilling wells is known, comprising a housing, a rock-breaking tool with calibrated holes, an ejector, high and low pressure cavities of which, via calibrated holes, communicate with the cavity under the tool, and the drill string Co

Недостатком этого устройства вл етс то, что калиброванные отверсти в процессе бурени подвергаютс интенсивному износу. Кроме того, в этом устройстве происходит гащение энергиии потока жидкости ввиду изменени его направлени в камере смещени и на выходе эжектора.A disadvantage of this device is that the calibrated holes during the drilling process are subject to intense wear. In addition, in this device, the energy of the fluid flow is quenched due to a change in its direction in the displacement chamber and at the exit of the ejector.

Известно также устройство дл бурени скважин, включающее породе разрушающий инструмент, корпус с осевым каналом и равномерно расположенными по окружности эжекторами, полость нагнетани которых расположена в верхней части корпуса, а полость разр жени сообщена с полостью под инструментом и осевым каналом корпуса посредством трубок, при этом эжекторы расположены под углом к про-дольной оси устройства 2.It is also known a device for drilling wells, comprising a rock destroying tool, a housing with an axial channel and evenly spaced ejectors, the injection cavity of which is located in the upper part of the housing, and the discharge cavity is communicated with the cavity under the tool and the axial channel of the housing through tubes Ejectors are angled to the longitudinal axis of the device 2.

В процессе работы устройства на трубки и эжекторы действует значительна динамическа нагрузка, в результа10 те чего по вл етс несоосность, диффузоров и сопел эжекторов,а следовательно , нестабильность режима их .работы и снижаетс надежность работы, устройства. Кроме того, расположение During operation of the device, a significant dynamic load acts on the tubes and ejectors, as a result of which misalignment appears, of diffusers and ejector nozzles, and consequently, the instability of their operation mode reduces the reliability of operation of the device. In addition, the location

15 эжекторов под углом к продольной оси устройства вызывает гашение энергии струй промывочной жидкости стенками скважины и размыв последних.15 ejectors at an angle to the longitudinal axis of the device causes the quenching of the energy of the jets of flushing fluid wellbore walls and the erosion of the latter.

Цель изобретени -..повышение на20 дежности работы устройства.The purpose of the invention is to increase the reliability of the device.

Claims

This goal is achieved by the fact that the device for drilling wells is provided with a baffle mounted to the axial channel of the body below the ejector and forming an annular suction cavity with the body, and the ejector are parallel to the axis of the body. Fig, 1 shows the proposed device, a longitudinal section; FIG. 2 is a section DD of FIG. The well drilling device Bjjunat rock-breaking tool i, body 2 with axial channel 3 and evenly located circumferentially ejectors 4, each of which consists of nozzles 5 and diffusers 6, partition 7 installed in axial channel 3 of body 2 below ejectors 4 and forming with the case 2 of the annular suction cavity A. The discharge cavity B above the defuser 6 is in communication with the cavity C under the tool 1 through the annular gap between the borehole wall and the device. In this case, cavity B under tool 1 is communicated through channel 8 in rock cutting tool 1 and cavity A formed by reheat 7 and body 2 with discharge cavity G under the diff: ax 6. The ejectors 4 are parallel to the axis of the cus. The device works as follows. The downward flow of flushing fluid is reflected by the septum 7 and is directed into the nozzles 5, through which the flushing fluid exhausts at high speed and creates discharge in cavity G, Then fluid through diffuser 6 enters cavity B and further to the wellhead. At that, due to the pressure difference into the cavity 4 B and B, part of the fluid through the annular gap between the borehole wall and the device enters the bottom and flows through the cavity A through the cavity A to the cavity G, where it mixes with the high-speed flow of liquid from the pellets 5. the application of the proposed device is obtained by increasing the reliability of the device, ensuring stable operation of the ejectors and eliminating the quenching of the energy of the jets of the washing liquid in the device. The formula invented by the 1st I Well Drilling Device includes a rock-breaking tool, a housing with an axial channel and evenly spaced ejectors around the circumference, the injection cavity of which is located in the upper part of the housing, and the discharge cavity communicates with the cavity under the tool that is in order to increase the reliability of the device, it is equipped with a partition mounted in the axial channel of the housing below the ejectors and forming an annular suction cavity with the housing, and the ejectors are parallel but the axle housing. Sources of information taken into account in examination I, Patent of France No. 1567862, cl. Ё 21 V 41/00, published, 1969,

2. US Patent No. 4022285, Cl, 175-65, published 1977,