SU945342A1

SU945342A1 - Directional borehole drilling apparatus

Info

Publication number: SU945342A1
Application number: SU802962431A
Authority: SU
Inventors: Михаил Гаврилович Аксенов; Борис Николаевич Сизов; Владимир Ильич Злобин
Original assignee: Сахалинский Государственный Научно-Исследовательский И Проектный Институт Газовой Промышленности
Priority date: 1980-07-16
Filing date: 1980-07-16
Publication date: 1982-07-23

Description

( УСТРОЙСТВО ДЛЯ НАПРАВЛЕННОГО БУРЕНИЯ СКВАЖИН(DEVICE FOR DIRECTED DRILLING WELLS

Изобретеьме относитс к буровой Технике, а именно к устройствам, обеспечивающим бурение направленных скважин роторным способом.The invention relates to a drilling Technique, namely to devices providing drilling of directional wells in a rotary manner.

Известно устройство дл ориентировани забойного дв11гател , включают вал и установленную на нем с возможностью вращени эксцентричную втулку со спиральными лопаст ми 1.A device for orienting a downhole actuator is known to include a shaft and an eccentric sleeve with spiral blades 1 mounted on it for rotation.

Недостаток устройства заключаетс в том, что оно может быть использовано только при турбинном бурении.The disadvantage of the device lies in the fact that it can only be used during turbine drilling.

Известно устройство дл направленного бурени скважин-, включающее по- саженный на ствол корпус с Эксцентричной накладкой и размещенный на наружной поверхности ствола кулачок 2.A device for directional drilling of wells is known, comprising a housing mounted on a barrel with an eccentric pad and a cam 2 placed on the outer surface of the barrel.

Недостатками известного устройства вл ютс ограниченность примейени и невозможность самоориентировани при роторном способе бурени .The disadvantages of the known device are the limited scope and the impossibility of self-orienting during the rotary drilling method.

Цель изобретени - повышение эффективности проводки направленныхThe purpose of the invention is to increase the efficiency of wiring directed

скважин за счет самоориентировани устройства..wells due to self-orienting device ..

Указанна цель достигаетс тем, что внутренн поверхность корпуса имеет кольцевую проточку и размещенный в ней упор, причем корпус посажен на стволе с зазором, равным Oiiсоте кулачка, а высота упора равна глубине проточки.This goal is achieved by the fact that the inner surface of the body has an annular groove and an abutment located therein, the body being seated on the barrel with a gap equal to Oii to the cam, and the height of the abutment being equal to the depth of the groove.

На фиг. 1 изображено устройство FIG. 1 shows the device

10 д л направленного бурени ; на фиге 2вид на А фиг. 1, транспортное положение; На фиг. 3 то же, рабочее положение.10 dl of directional drilling; in FIG. 2, view A in FIG. 1, transport position; FIG. 3 is the same working position.

Claims

5 The device consists of body 1 ,. inside which there is an annular groove 2 with an abutment 3. placed on it. On the outer side of the body against the abutment there are longitudinal notches 4 for better adhesion of the body to the walls of the borehole. pressed into the case. A cam 7 is mounted on the barrel 5, rotating inside an annular groove. The housing 1 is set on the barrel 5 with a gap equal to the height of the cam 7, and the height of the stop 3 is equal to the depth of the groove 2 The outer diameter of the barrel on which the housing is located is smaller than the inner diameter of the slide bearings. The housing is raised from below by the lower sub 8. An eccentric cover 9 is installed on the outer side of the housing in a given place. The device operates as follows. During the drilling of an inclined borehole, the barrel of the device rotates with the drill pipes. At the same time, rotation through the cam 7 and the anvil 3 is transferred to the housing 1. The housing 1 is rotated together with the drill pipes to a certain position, in which the cam and the antizag stop come out. From this moment (Fig. 3), the device body does not rotate during drilling, it moves progressively downwards as the well deepens. The exit of the cam 7 and the anvil 3 from engagement is provided by the pressing action of a component of the weight of the drill pipe, as well as by the presence of a gap between the device barrel 5 and the slide bearing 6. Thus, the stop 3 in an inclined borehole can occupy only one previously known position in space (at the upper point of the section of the well bore). Knowing the position of the anvil and the body in the inclined borehole and the necessary change in the direction of the borehole trajectory, an eccentric pad is attached to the outside of the body, which displaces the axis of rotation of the drilling tool from the borehole axis in the desired direction. By selecting the thickness of the patch and the location of the centralizer in the bottom-hole assembly, it is possible to control the trajectory of the wellbore with any predetermined intensity. The economic efficiency of introducing a device for directional drilling of wells arises due to the possibility of controlling the trajectory of the wellbore using self-orienting with a rotary drilling method. The invention of the device for directional drilling of wells, including a fitted body on the barrel with an eccentric pad, and a cam placed on the outer surface of the barrel, which is limited by the fact that the inner surface of the housing has an annular groove and an emphasis placed therein, with the body mounted on the barrel with a gap equal to the height of the cam, and the BbicoTa of the stop is equal to the depth of the attachment. Information sources, . taken into account during the examination 1. USSR author's certificate №,. cl. B 21 C 7/08, 1977.

2. US patent number 2712i 37, class. 175-73, published. 1955 (prototype).

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