SU935598A1

SU935598A1 - Shoe cutter

Info

Publication number: SU935598A1
Application number: SU802998484A
Authority: SU
Inventors: Роман Васильевич Винярский; Иван Евгеньевич Пришляк; Анатолий Тимофеевич Левченко; Анатолий Панфилович Терлецкий; Григорий Исакович Дранкер; Александр Федорович Оверко
Original assignee: Государственный Научно-Исследовательский И Проектный Институт Нефтяной Промышленности "Укргипрониинефть"
Priority date: 1980-10-27
Filing date: 1980-10-27
Publication date: 1982-06-15

Description

(Б ) БАШМАЧНЫЙ ФРЕЗЕР(B) BOOM MILLING MACHINE

II

Изобретение относитс к бурению скважин и может быть использовано при ликвидации аварий путем обуривани прихваченных колонн труб.The invention relates to the drilling of wells and can be used in response to accidents by smoking stuck pipe strings.

Известен башмачный фрезер, включающий корпус с армированными зубь ми на рабочем торце 11Даннь1Й фрезер может быть эффективно использован только при;расположении аварийной колонны по оси скважины ..A shoe milling cutter is known, which includes a housing with reinforced teeth at the working end of the 11D milling cutter can only be effectively used when the emergency column is located along the well axis.

Цаиболее близким к предлагаемому по технической Сущности и достигаемому результату вл етс башмачный фрезер, включающий корпус с режущей Кромкой в виде заходного конуса, армированного резцами 2. The closest to the proposed technical essence and the achieved result is a shoe milling cutter comprising a body with a cutting edge in the form of a lead-in cone reinforced with incisors 2.

Недостатком данного фрезера вл етс низка эффективность ё случае необходимости разбуривани стенок скважины. Зто св зано стесненными услови ми работы фрезерз в скважине и сложностью размещени на;тонкостенНОЙ торцевой поверхности фрезера мощных режущих элементов.The disadvantage of this router is low efficiency in case of the need to drill the walls of the well. This is due to the constrained working conditions of the cutters in the borehole and the complexity of placing on the thin-walled end surface of the cutter powerful tools.

Цель изобретени - повышение эффективности его работы за счет локального расширени скважины напро ,тив прихваченной колонны.The purpose of the invention is to increase the efficiency of its work due to the local expansion of the well against the stuck column.

Это достигаетс тем, что режуща кромка фрезера выполнена эксцентрично относительно оси вращени корпуса, причем фрезер снабжен сменной экс10 центричной втулкой, закрепленной в полости корпуса, при этом эксцентриситеты корпуса и втулки направлены в одну сторону.This is achieved by the fact that the cutting edge of the router is eccentric relative to the axis of rotation of the housing, the router is equipped with a replaceable eccentric sleeve, fixed in the cavity of the housing, while the eccentricities of the housing and sleeves are directed to one side.

На фиг. 1 изображен фрезер, разts рез; на фиг. 2 - вид А на фиг. 1; на фиг. 3 - схема работы фрезера.FIG. 1 shows a router, rests cut; in fig. 2 is a view A of FIG. one; in fig. 3 - scheme of the mill.

Claims

The shoe mill consists of a hollow body 1, the upper part of which is cylindrical and connected by means of a thread 2 with a fishing column 3, and the cutting edge in the form of a lead-in cone is made with eccentricity 1-1 relative to the connecting thread 2. The cutting edge k is reinforced with cutters 5 along the outer internal and end surfaces. Inside the case 1, a replaceable sleeve 6 with eccentricity IT. is installed, the inside diameter of which is 10-12 mm larger than the diameter of the pipe 7. The sleeve 6 has a lug on the bottom end. one cone 8. The sleeve 6 is oriented and fixed in the housing 1 by means of pins 9 so that the eccentricities 1 /) and 12 are in the same vertical plane. The operation of the mill is as follows. A shoe mill, the outer diameter of which in the region of the lower end (eccentricity 1) is smaller than the diameter of the well, is attached to the fishing column 3 and lowered into the well. When the head of the stuck pipe 8 is reached, the circulating drilling pacTBQpa is circulated, rotation is reported to the router and, with a small load, the stuck pipe string is milled. The presence of a drive cone, made with eccentricity, volume 1, contributes, regardless of the position of the stuck column, to the gradual destruction of the head of the loaded column and the wall of the wells. Since the hardness of the metal is much higher than the hardness of the rock, the mill will quickly destroy the borehole wall, thereby ensuring a smooth flow of the head of the stuck column inside the mill and into the replaceable sleeve 6. Increasing the axial load on the mill, the pipe string is loaded all over the /; line. In the presence of a stuck column of pipes of different diameters in the arrangement, the inner diameter of the sleeve 6 is chosen in accordance with the diameter of the pipe being loaded. For this, the router is extracted to the surface and the sleeve 6 is changed. The presence of the replaceable sleeve 6 with eccentricity 1 2. and eccentricity 1 provide local expansion of the well opposite the stuck column. The proposed shoe milling cutter makes it possible to form around the sticking string an annular production with a diameter sufficient for unhindered passage of the fishing string, which prevents its jamming in the well or additional sticking. Moreover, by performing a cutting edge with an eccentric filter, the drilling of the borehole walls is performed only in the area of the stuck pipe string, which significantly reduces the time spent on the drilling of the emergency string. Claim 1. Bashmachny router, including a case with a cutting edge in the form of a lead-in cone, reinforced with cutters, characterized in that, with the aim of increasing its efficiency due to the local expansion of the well opposite the stuck column, the edge of the router is eccentric relative to the axis of rotation enclosures. 2. The router according to claim 1, of tl and h a - y i and so that it is equipped with a replaceable eccentric bushing fixed in the body cavity, while the eccentricities of the body towards the bushing are directed to one side. Sources of information taken into account in the examination 1. US patent number 2863b4, cl. 166-237, publ. 1959.

2.Pustovoitenko I.P. Prevention and liquidation of accidents in drilling, M., Nedra, 1973, p. 155-158 Gprotioty).