SU1659648A1

SU1659648A1 - Downhole device for producing transverse fissures

Info

Publication number: SU1659648A1
Application number: SU894723760A
Authority: SU
Inventors: Геннадий Степанович Мурзин; Александр Леонидович Исаков; Василий Николаевич Белобородов; Виктор Владимирович Шмелев
Original assignee: Институт Горного Дела Со Ан Ссср
Priority date: 1989-07-26
Filing date: 1989-07-26
Publication date: 1991-06-30

Abstract

Изобретение относитс к горному делу и м.б. использовано при создании инициирующих трещин на стенках скважин, перпендикул рных ее оси дл последующего гидроразрыва массива, а также при отбойке горной массы в прочных монолитных и напр женных породах. Цель - упрощение кон- струкции и расширение области применени устройства. Устр-во содержит корпус (К) 1 в виде ствола с посто нным по длине диаметром осевого канала 2 и с наружным диаметром, равным диаметру окружности , описывающей поперечные закалывающие элементы (Э) 14, св занные гибкими т гами 13 с торцом К 1. В осевом канале 2 К 1 установлен поршень 6 с клиновой частью 8. Длина поршн 6 с клиновой частью 8 меньше длины осевого канала 2. В исходном положении поршень 6 с клиновой частью полностью расположены в канале 2 К 1. В тыльной части канала 2 К 1 расположен узел динамического продольного перемещени поршн б, выполненный в виде зар да ВВ 4. После установки устр-ва в шпур подрываетс в К 1 зар д В В 4. Поршень 6 разгон етс в канале 2 и клиновой частью 8 раздвигает Э 14.В недр сь под действием клиновой части 8 в породу, Э 14 создают трещины на стенках шпура. 1 з.п.ф-лы, 2 ил.The invention relates to mining and m. it was used to create initiating cracks on the walls of wells, perpendicular to its axis for subsequent fracturing of the massif, as well as for breaking rock in strong monolithic and stressed rocks. The goal is to simplify the design and expand the field of application of the device. The device includes a housing (K) 1 in the form of a barrel with a constant along the length diameter of the axial channel 2 and with an outer diameter equal to the diameter of the circle describing transverse pinning elements (E) 14 connected by flexible rods 13 with the end face K 1. In the axial channel 2 K 1, a piston 6 with a wedge part 8 is installed. The length of the piston 6 with a wedge part 8 is less than the length of the axial channel 2. In the initial position, the piston 6 with the wedge part is completely located in the channel 2 K 1. In the rear part of the channel 2 K 1 located node of the dynamic longitudinal movement of the piston b, In the form of a device, explosive charge 4. After installation, the device in the borehole is undermined in K 1. In B 4. The piston 6 accelerates in channel 2 and the wedge part 8 pushes E 14. Under the action of the wedge part 8 into the rock , E 14 create cracks on the walls of the hole. 1 hp ff, 2 ill.

Description

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Claims

Claim

1. A downhole device for the formation of transverse cracks, including a housing, transverse pinning elements located around a circle and connected by flexible rods with the end face of the housing, a piston with a wedge portion mounted in the housing with the possibility of longitudinal movement and sliding by the wedge tip of the pinning elements, a dynamic longitudinal movement unit piston towards the pinning elements. characterized in that, in order to simplify the design and expand the scope of the device, the housing is made in the form of a barrel with an outer diameter equal to the diameter of the circle describing the hardening elements and a constant axial channel diameter equal to the diameter of the piston, while the length of the piston with a wedge part is less than the length of the axial channel, the piston with the wedge part in the initial position is completely located in the bore, and the node for dynamic longitudinal movement of the piston is made in the form of an explosive charge located in the rear portion of the bore.

2. The device according to claim 1, which is limited in that the piston is provided with a centering ring of plastic material fixed to its wedge part.

Fig.