SU779571A1

SU779571A1 - Device for connecting casing sections

Info

Publication number: SU779571A1
Application number: SU762334622A
Authority: SU
Inventors: Иосиф Адольфович Новосилецкий; Виталий Юрьевич Полищук; Вениамин Дмитриевич Куртов; Николай Федорович Пекарский
Original assignee: за вители и Н.Ф. Пекарский НТВ ФШЩ Ш Куртов
Priority date: 1976-03-17
Filing date: 1976-03-17
Publication date: 1980-11-15

Description

(54) УСТРОЙСТВО ДЛЯ СОЕДИНЕНИЯ СЕКЦИЙ ОБСАДНОЙ КОЛОННЫ(54) DEVICE FOR CONNECTING COLUMN COLUMN SECTIONS

Изобретение относитс к креплению буровых скважин, а именно к устройствам дл соединени секций обсадной колонны спускаемой в скважину отдельными секци ми.5The invention relates to the mounting of boreholes, namely, devices for connecting the sections of a casing string launched into the well in separate sections.

Известно устройство дл соединени секций обсадной колонна, содержащее стыковЬчнук Муфту и стыковочный ниппель с направл ющей насад- . КОЙ 1 .ОA device is known for connecting sections of a casing string containing a docking collar. A coupling and a docking nipple with a guide. WHICH 1 .O

Недостатком этого устройства вл етс невысока надежность сбед(инени секций и отсутствие достоверной информации о проведении стыковки секций.15A disadvantage of this device is the low reliability of the failure (partitions and the lack of reliable information on the conduct of the docking sections. 15

Наиболее близким к изобретению по технической сущности и дос1игаемому результату вл етс устройство дл соединени секций обсадной колонны , содержащее закрепленную на 20 нижней секции стыковочную муфту с фикс атором замка на внутренней поверхности , закрепленный на верхней секции стыковочный ниппель с направл ющей насадкой и пружинный 25 замок из легкоразбуриваемого материала 2 .The closest to the invention to the technical essence and the achievable result is a device for connecting casing sections, which has a docking sleeve fixed on the 20 lower section with a lock lock on the inner surface, mounted on the upper section of the docking nipple with a guide nozzle and a spring 25 lock from easily drilled material 2.

Недостаток этого устройства необходимость Сравнительно большого зазооа между стенками обсадной колон-30The disadvantage of this device is the need for a relatively large zone between the walls of the casing column-30

ны и скважины, так как фиксатор выполнен в виде проточки и приходитс увеличивать наружный диаметр стыковочной муфты.and boreholes, since the retainer is made in the form of a groove and the outer diameter of the coupling must be increased.

Цепь изобретени - уменьшение зазора меаду стенками обсадной колонны и сквсикины.The chain of the invention is to reduce the gap between the walls of the casing and squivs.

Claims

This goal is achieved by the fact that the device for connecting casing sections, which has a docking sleeve fixed to the lower section with a lock lock on the inner surface, a docking nipple with a guide nozzle and a spring lock made of easily-drilled material, is attached to the upper section, which has an outer diameter less than the diameter of the docking nipple and is secured with its lower end and guide nozzle. A spring lock in this device is placed on the nozzle, and the lock lock is made in the form of a ring of easily drilled material, the inner diameter of which is smaller than the diameter of the docking sleeve and larger than the outer diameter of the nozzle. . The drawing shows schematically a device for connecting casing sections, a general view. it consists of a docking coupling 1, fixed on the lower section 2. casing, docking nipple 3, mounted on the upper section 4, guide nozzle 5 and spring lock 6. Between the lower end of the docking nipple 3 and the guide, nozzle 5 is fixed to nozzle 5, which is made of easily-drilled material and has an outer diameter less than the diameter of the docking nipple 3. The spring lock b is placed on the nozzle 7, and the lock clamp 8, fixed to the inner surface of the docking coupling 1 by the shear element 9, is made of easily drilled material in the form of a ring, the inner diameter which is smaller than the diameter of the docking sleeve 1 and larger than the outer diameter of the nozzle 7. After the bottom section 2 of the casing with the connecting sleeve 1 attached to its upper end is lowered into the well and cemented, the upper section 4 is lowered. the pipe 7 enters the docking sleeve 1, and the spring lock 6 is compressed and passes through the clamp 8. Information about the docking is carried out by pacing the top section 4 for the length of the pipe 7. Ensuring that the docking is correct, continue descending the upper section to the entrance of the docking sleeve 1 of the docking nipple 3, which results in a reliable connection of the sections. If it is necessary to disconnect the joint, the upper section under the NW-up with the load exceeds the design, as a result of which the shear element 9 is destroyed, and the lock clamp 8 is removed from the coupling sleeve 1 together with the lock b and the branch pipe 7. After the docking and cementing of the upper section are completed a guide bit 5, a spring lock 6, a nozzle 7 and a retainer 8 are drilled, as a result of which an equal-pass connection of the casing sections is obtained. The coupling sleeve 1 is not weakened by a groove and its outer diameter does not increase, as a result of which it is possible to reduce the gap between the casing walls and the well. The use of the proposed device will allow to drill squash of smaller diameter, which will increase the commercial speed of drilling and reduce the consumption of materials. Apparatus of the Invention A device for connecting casing sections, comprising a docking sleeve fixed to the lower section with a lock lock on the inner surface, a docking nipple with a guide nozzle attached to the upper section, and a spring lock of readily drilled material that differs in that in order to reduce the gap between the walls of the casing and the borehole, it is equipped with a pipe of easily cut material that has an outer diameter smaller than the diameter of the connecting nipple and is fixed It is located between its lower end and the guide nozzle, while the spring lock is placed on the pipe, and the lock lock is made in the form of a ring of easily-drilled material, the inner diameter of which is smaller than the diameter of the docking sleeve and larger than the outer diameter of the nozzle. Sources of information taken into account in the examination 1.Lev.in EM and others. The descent and suspension shank when attaching wells. Grozny, Chechen-Ingush Publishing House, 1970, p. 44-45.

2. USSR author's certificate number 316837, cl. Е 21 В 17/08, 14Уа70 (prototype).