SU926212A1

SU926212A1 - Guide column for inclined well drilling

Info

Publication number: SU926212A1
Application number: SU792780124A
Authority: SU
Inventors: Эдуард Борисович Караш; Оскар Эдуардович Караш; Тофик Рза Гусейн Оглы Мамедов; Алибайрам Мешадигусейн Оглы Абдулзаде
Original assignee: Научно-исследовательский и проектный институт "Гипроморнефтегаз"
Priority date: 1979-09-11
Filing date: 1979-09-11
Publication date: 1982-05-07

Description

Изобретение относится к области бурения нефтяных и газовых скважин.The invention relates to the field of drilling oil and gas wells.

Известна направляющая колонна для бурения наклонных скважин, включающая криволинейный участок обсадной трубы П].Known guide string for drilling deviated wells, including a curved section of the casing P].

Недостаток этой конструкции заключается в том, что она применима для скважин, имеющих незначительную глубину, так как из-за неровностей ствола скважины не гарантировано доведение изогнутой трубы на большую глубину.The disadvantage of this design is that it is applicable for wells having a shallow depth, since due to irregularities in the wellbore it is not guaranteed to bring a bent pipe to a greater depth.

Наиболее близким техническим решением к изобретению является направляющая колонна для бурения наклонных скважин, состоящая из труб, связанных между собой муфтой, которая в свою очередь шарнирно связана с кольцами, установленными по обеим сторонам муфты [2).The closest technical solution to the invention is a guiding column for drilling deviated wells, consisting of pipes interconnected by a sleeve, which in turn is pivotally connected to rings mounted on both sides of the sleeve [2).

Недостаток известного устройства заключается в том, что оно не обес15 печивает направленного искривления колонны и имеет сложную конструкцию.A disadvantage of the known device is that it does not provide directional curvature of the column and has a complex structure.

Цель изобретения - упрощение конструкции направляющей колонны.The purpose of the invention is to simplify the design of the guide columns.

Поставленная цель достигается тем, что концы труб имеют скошенные торцы и жестко связанное с трубами опорное' кольцо с пальцами, причем соединительные муфты имеют прорези для размещения последних, а в нижней части колонны выполнено радиально^ отверстие, расположенное диаметрально скосам концов труб.This goal is achieved in that the ends of the pipes have beveled ends and a support ring with fingers rigidly connected to the pipes, and the couplings have slots for accommodating the latter, and a radially open hole is made in the lower part of the column, which is located diametrically to the bevels of the ends of the pipes.

На фиг. 1 показана направляющая колонны для бурения наклонных скважин' в рабочем положении, общий вид; на . фиг. 2 - узел соединения труб колонны при транспортном ее положении; на фиг. 3 ~ то же, рабочее положение; на фиг. 4 - разрез А-А на фиг. 2.In FIG. 1 shows a guiding string for drilling deviated wells in a working position, general view; on . FIG. 2 - node connecting the pipes of the column in its transport position; in FIG. 3 ~ the same, working position; in FIG. 4 is a section AA in FIG. 2.

Направляющая колонна состоит из труб 1 и 2, концы которых имеют скошенные торцы и связаны соединительной муфтой, содержащей нижнюю 3 и верх3 92( нюю 4 части. Скос концов труб располагается по одной образующей направляющей колонны. На каждой трубе колон ны имеется жестко связанное с трубой опорное кольцо 5 с пальцами 6, для размещения которых муфта имеет прорезь 7· Герметизация осуществляется уплотнительными манжетами 8. В нижней части колонны имеется радиальный канал 9, расположенный на противоположной стороне относительно скосов концов труб, т.е. направления искривления.The guide column consists of pipes 1 and 2, the ends of which have beveled ends and are connected by a coupling containing the lower 3 and upper 3 92 (4 parts. The beveled ends of the pipes are located along one generatrix of the guide column. Each column pipe has a rigidly connected pipe supporting ring 5 with fingers 6, for accommodating which the coupling has a slot 7 · Sealing is carried out by sealing cuffs 8. In the lower part of the column there is a radial channel 9 located on the opposite side relative to the bevels of the pipe ends, t .e. direction of curvature.

Работа производится следующим образом.The work is as follows.

На заданную глубину бурится вертикальный ствол диаметром большим, чем диаметр спускаемой направляющей колонны. После сборки направляющей составной секции, состоящей из двухтрех труб 1 и 2, она ориентируется на поверхности по заданному азимуту и дальнейший спуск колонны производится с использованием одного из приемов ориентированного спуска. Перед посадкой колонны на забой через нее прокачивается промывочная жидкость, струя которой, выходя через радиальный канал 9, отклоняет нижнюю часть колонны в заданном направлении.A vertical shaft with a diameter larger than the diameter of the descent guide column is drilled to a given depth. After assembling the guide composite section, consisting of two three pipes 1 and 2, it is oriented on the surface in a given azimuth and the further descent of the column is carried out using one of the methods of oriented descent. Before landing the column on the bottom through it flushing fluid is pumped, the jet of which, leaving through the radial channel 9, deflects the lower part of the column in a given direction.

Посадкой колонны с разгрузкой части веса на забой криволинейное положение колонны фиксируется. В таком положении направляющая колонна цементируется.By landing the column with unloading part of the weight on the bottom, the curvilinear position of the column is fixed. In this position, the guide column is cemented.

Технико-экономическая эффективность предлагаемого способа заключа>212 4 ется в возможности необходимого заглубления криволинейной направляющей колонны, в частности установки криволинейных колонн на разных глуби- нах в условиях сооружения кустов скважин на суше и в море, повышении качества профиля наклонных скважин, предотвращении осложнений, гидроразрывов пород, заколонных прорывов цир10 куляции, связанных с недоведением направляющих колонн до расчетных глубин .The technical and economic efficiency of the proposed method consists in the possibility of the necessary deepening of the curved guide string, in particular the installation of curved columns at different depths in the conditions of construction of well clusters on land and at sea, improving the quality of the profile of deviated wells, preventing complications, hydraulic fracturing rocks, cathodic breakthroughs of circulation 10, associated with the lack of leading columns to the calculated depths.

Claims

This invention relates to the field of drilling oil and gas wells. A known guide column for drilling inclined wells, which includes a curved section of the casing D. The disadvantage of this design is that it is applicable to wells that have a shallow depth, since due to the unevenness of the wellbore it is not guaranteed to bring the bent pipe to a large head. . The closest technical solution to the invention is a guide string for drilling inclined wells, consisting of pipes connected by a coupling, which in turn is articulated with rings installed on both sides of the sleeve 12. A disadvantage of the known device is that it does not provide directional curvature of the column and has a complex structure. The purpose of the invention is to simplify the design of the guide column. The goal is achieved by the fact that the ends of the pipes have beveled ends and rigidly connected with the pipes supporting ring with fingers, the connecting sleeves having slots to accommodate the latter, and in the lower part of the column there is a radial hole located diametrically with the bevel of the ends of the pipes. FIG. 1 shows a guide string for drilling inclined wells in the working position, a general view; on . FIG. 2 - unit for connecting pipes of a column at its transport position; in fig. 3 - the same working position; in fig. k - section A-A Ia of FIG. 2. The guide column consists of pipes 1 and 2, the ends of which have beveled ends and are connected by a coupling having a lower 3 and an upper 4 parts. The bevel of the ends of the pipes is arranged along one forming guide column. On each pipe of the column there is a supporting ring 5 rigidly connected with the pipe 6 with fingers 6 for placing which the coupling has slot 7. Sealing is carried out by sealing sleeves 8. At the bottom of the column there is a radial channel 9 located on the opposite side relative to the bevel of the pipe ends i.e. curvature directions. The work is as follows. A vertical shaft with a diameter greater than the diameter of the descending guide column is drilled to a predetermined depth. After assembling the guide composite section consisting of two-three pipes 1 and 2, it is oriented on the surface in a given azimuth and the further descent of the column is carried out using one of the techniques of oriented descent. Before landing the column on the bottom, a flushing fluid is pumped through it, the jet of which, going out through the radial channel 9, deflects the lower part of the column in a given direction. By planting the column with unloading the weight part to the bottom, the curvilinear position of the column is fixed. In this position, the coline guide is cemented. The technical and economic efficiency of the proposed method lies in the possibility of necessary deepening of the curvilinear guide column, in particular the installation of curvilinear columns at different depths in the conditions of construction of well clusters on land and at sea, improving the quality of the profile of inclined wells, preventing complications, hydraulic fracturing, annular circulatory breakthroughs associated with the lack of guiding columns to the calculated depths. The invention Guideline for drilling an inclined well, including pipes, couplings and sealing rings, in order to simplify the design, the ends of the pipes have beveled ends and rigidly connected to the pipes bearing ring with fingers, and The sleeves have slots to accommodate the latter, and in the lower part of the column there is a radial hole located diametrically to the bevels of the pipe ends. Sources of information taken into account in the examination 1. US patent number 3899032, cl. 175-9, published. 1975.

2. Japanese Patent No. 51-33 82, cl. Е 21 В 17/08, published. 1976 (prototype).

A-J

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