SU885531A1

SU885531A1 - Borehole expander

Info

Publication number: SU885531A1
Application number: SU802888330A
Authority: SU
Inventors: Роман Анатольевич Буланов; Николай Евгеньевич Ермолаев; Сергей Михайлович Александров; Михаил Николаевич Тедеев
Original assignee: Предприятие П/Я М-5703
Priority date: 1980-02-29
Filing date: 1980-02-29
Publication date: 1981-11-30

Description

Изобретение относится к горному делу, в частности к устройствам для расширения скважин,The invention relates to mining, in particular to devices for expanding wells,

Известны расширители скважин, содержащие корпус, шарнирно установленные в нем гидроразрушающие органы с лапами, патрон, разме- 5 щенный во внутренней полости корпуса, боковые выступы которого размещены в пазах корпуса, штоки, установленные в полостях патрона с возможностью взаимодействия с одной стороны с днищем корпуса, а с другой — с хвостовиками ¹⁰лап и съемные направляющие пальцы, закрепленные в корпусе и входящие в пазы патрона, при этом пазы патрона под направляющие пальцы и пазы корпуса под выступы патрона выполнены Г-образными, вертикальные части пазов на- ¹⁵правлены соответственно к лапам породоразрушающих органов и от них, а горизонтальные в плане — по часовой стрелке (1].Well-known expanders of wells containing a housing, articulated hydraulic fracturing organs with paws, a cartridge located in the internal cavity of the housing, side protrusions of which are located in the grooves of the housing, rods installed in the cavities of the cartridge with the possibility of interaction on one side with the bottom of the housing and, on the other hand, with shanks of ¹⁰ legs and removable guide fingers fixed in the housing and included in the grooves of the cartridge, while the grooves of the cartridge for the guide fingers and grooves of the body under the protrusions of the cartridge are made L-shaped, ver tikalnye of the grooves HA ¹⁵ I correct accordingly to the paws porodorazrushajushchih organs and from them, and the horizontal plan - clockwise (1].

Эти расширители имеют сложную конструкцию и в результате недостаточно надежны в работе.These expanders have a complex structure and, as a result, are not reliable enough.

Наиболее близким к предлагаемому является устройство для расширения скважин, включающее корпус с окнами, в которых расположены лапы.Closest to the proposed is a device for expanding wells, including a housing with windows in which the legs are located.

установленные на осях корпуса, размещенных в Отверстиях лап, оснащенных породоразрушающими элементами. В этом устройстве перевод расширителя в рабочее положение производится перемещением штока вверх, например, гидромеханизмом, шток, двигаясь вверх, раздвигает и приподнимает лапы с породоразрушающими лопастями и вводит их в контакт с конической поверхностью корпуса [2].mounted on the axes of the housing, located in the openings of the legs, equipped with rock cutting elements. In this device, the expander is put into working position by moving the rod up, for example, by a hydromechanism, the rod moving up, spreads and lifts the legs with rock-cutting blades and puts them in contact with the conical surface of the body [2].

Недостатками устройства являются сложность механизма перевода расширителя в рабочее положение и ненадежность его в работе.The disadvantages of the device are the complexity of the mechanism for translating the expander into the working position and its unreliability in operation.

Цель изобретения - повышение надежности работы.The purpose of the invention is to increase the reliability.

Указанная цель достигается тем, что в устройстве для расширения скважин, включаю- щем корпус с окнами, в которых расположены лапы, установленные на осях корпуса, размещенных в отверстиях лап, оснащенных породоразрушающими элементами, корпус снабжен дополнительной осью для каждой лапы, которая размещена в дополнительном отверстии, выполненном в лапе, при этом отверстия для осей выполнены в виде паза и расположены под углом к вертикальной оси устройства.This goal is achieved by the fact that in the device for expanding the wells, including the casing with windows in which paws are located, mounted on the axes of the casing, located in the holes of the paws equipped with rock cutting elements, the casing is equipped with an additional axis for each paw, which is placed in an additional holes made in the paw, while the holes for the axes are made in the form of a groove and are located at an angle to the vertical axis of the device.

На фиг. 1 изображено устройство, общий вид; на фиг. 2 — сечение А-А на фиг. 1; на фиг. 3 — устройство, разрез.In FIG. 1 shows a device, a General view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - device, section.

Устройство для расширения скважин содержит корпус 1, соединенный с наконечником 2 бурового става 3, в окне 4 корпуса 1 расположены лапы: 5, оборудованные породоразрушающими элементами 6. Каждая лапа 5 выполнена по меньшей мере с двумя наклонными пазами 7. В каждом пазу 7 размещена ось 8, закрепленная в корпусе 1. Для бурения опережающей скважины устройство снабжено буровой коронкой 9. На корпусе 1 выполнен выступ 10, в который упираются лапы 5 в рабочем положении. Для производства одновременной обсадки скважины при расширении скважин в раздробленных породах на корпусе 1 размещено кольцо 11, за которое зацепляется обсадная колонна 12, охватывающая буровой став 3.A device for expanding wells includes a housing 1 connected to the tip 2 of the drill string 3, in the window 4 of the housing 1 there are legs: 5, equipped with rock cutting elements 6. Each leg 5 is made with at least two inclined grooves 7. An axis is placed in each groove 7 8, mounted in the housing 1. For drilling a leading well, the device is equipped with a drill bit 9. On the housing 1, a protrusion 10 is made, in which the legs 5 rest in the working position. To produce simultaneous casing of the well during the expansion of wells in crushed rocks, a ring 11 is placed on the casing 1, for which a casing 12 engages, covering the drill string 3.

Расширение скважин с помощью предлагаемого устройства происходит следующим образом.The expansion of wells using the proposed device is as follows.

Забуривается опережающая скважина 13 ' буровой коронкой 9, при этом,’ если устройство не снабжено буровой коронкой 9, опережающая скважина бурится предварительно. Лапы 5 под действием усилия резания при взаимодействии породоразрушающих элементов 6 с опережающей скважиной 13 поднимаются вверх до упора торцов 14 лап 5 в выступ 10, а так как лапы 5 закреплены в окне 4 корпуса 1 посредством осей 8, свободно размещенных в лапах 5 с наклоном, они одновременно выдвигаются наружу, обеспечивая расширение скважины.The leading well 13 'is drilled with a drill bit 9, while ’if the device is not equipped with a drill bit 9, the leading well is pre-drilled. Paws 5 under the action of cutting forces in the interaction of the rock cutting elements 6 with the leading well 13 rise up to the end faces 14 of the paws 5 in the protrusion 10, and since the paws 5 are fixed in the window 4 of the housing 1 through the axes 8, freely placed in the paws 5 with an inclination, they simultaneously extend outward, providing expansion of the well.

При расширении скважины в раздробленных породах одновременно происходит ее обсадка, благодаря зацеплению обсадной колонны 12 за кольцо 11, свободно размещенное на корпусе 1. По окончании расширения скважины устройство легко удаляется из нее, так как лапы 5;· своими скошенными боковыми гранями взаимодействуют со стенками обсадной колонны и благодаря этому взаимодействию и собственному весу опускаются вниз и одновременно убираются внутрь корпуса 1 при перемещении наклонных пазов 7 вдоль осей 8.When a well is expanded in crushed rocks, it is cased at the same time, due to the engagement of the casing 12 by the ring 11, which is freely placed on the casing 1. At the end of the expansion of the well, the device is easily removed from it, since the paws 5; with their beveled side faces interact with the casing walls the columns and due to this interaction and their own weight are lowered down and simultaneously retracted into the housing 1 while moving the inclined grooves 7 along the axes 8.

Предлагаемое устройство имеет более простую конструкцию механизма выдвижения лап с поподоразрушающими элементами в рабочее положение, а следовательно, более высокую надежность работы..The proposed device has a simpler design of the mechanism for extending the legs with podrazodrazhayuschih elements in the working position, and therefore, higher reliability ..

Claims

The invention relates to mining, in particular to devices for expanding wells. Well extenders are known, comprising a housing, hydrotransmitting destructive organs with paws mounted therein, a cartridge positioned in the interior of the housing, the lateral protrusions of which are located in the slots of the housing; in the cavity of the cartridge with the MO idocTbro carriage interacting on the one hand with the bottom of the body, and on the other with the shanks of the paws and removable guide pins attached to the body and entering into the grooves of the cartridge, while the grooves of the cartridge under the guides of the case and the grooves of the body under the protrusions of the cartridge are L-shaped, the vertical parts of the grooves are directed respectively to the paws of the rock-destroying organs and from them, and the horizontal ones in the plan are clockwise 1. These expanders have a complex structure and as a result are not reliable enough work. Closest to the present invention is a device for expanding wells, including a housing with windows in which paws are mounted on the axes of the housing, housed in a hole of the legs, equipped with rock-breaking elements. In this device, the expander is transferred to the working position by moving the rod up, for example, by a hydraulic mechanism, the pins move upward, pushes and lifts the paws with rock beater blades and puts them in contact with the conical surface of the body 2. The disadvantages of the device are the complexity of the expander transfer mechanism in working position and its unreliability in work. The purpose of the invention is to increase the reliability of work. This goal is achieved by the fact that in a device for expanding wells, including a housing with windows in which paws are located, mounted on the axes of the housing, accommodated in the holes of the paws equipped with rock-breaking elements, the housing is provided with an additional axis for each paw that is placed in the additional hole made in the paw, while the holes for the axes are made in the slot and are angled to the vertical axis of the device. FIG. 1 shows the device, a general view; in fig. 2 - section A-A in FIG. one; in fig. 3 - the device section. The device for expanding the wells includes a housing 1 connected to the tip 2 of a drilling rod 3, in the window 4 of the housing 1 are located paws: 5, equipped with rock-breaking elements 6. Each paw 5 is made with at least two inclined grooves 7. In each groove 7 there is an axis 8, fixed in the housing 1. For drilling the pilot well, the device is equipped with a 6jpo crown 9. On the housing 1, a protrusion 10 is made into which the legs 5 are in working position 5T1. For the production of simultaneous well casing during the expansion of the well in the crushed rocks on the housing 1 is placed a ring 11, for which the casing 12 engages, covering the drilling rig 3. The wells are expanded using the proposed device as follows. The pilot hole 13 is drilled with a drill bit 9, and if the device is not equipped with a drill bit 9, the drill hole is drilled in advance. The paws 5 under the action of cutting force when the rock cutting elements 6 interact with the advance well 13 rise up to the stop of the ends 14 of the paws 5 into the protrusion 10, and since the paws 5 are fixed in the window 4 of the housing 1 by means of the axes 8 freely placed in the paws 5 with a slope , they simultaneously extend outward, providing an expansion of the squashine. When the well is crushed in fractured rocks, the casing at the same time occurs due to the engagement of casing 12 over the ring 11, which is freely placed on housing 1. After the expansion of the well completes, the device can be easily removed from it, because the paws 5: with their beveled sides: 1 facets interact with the casing walls and due to this interaction and their own weight they drop down and simultaneously retract into the body 1 when moving the inclined grooves 7 along the axes 8. The proposed device has a simpler The design of the mechanism for the extension of the legs with the post-destructive elements into the working position and, consequently, the higher reliability of operation. Formula of the Invention A device for expanding wells, including a body with windows, in which legs are located mounted on the axes of the body located in the holes of the legs, equipped with rock-breaking elements, characterized in that, in order to increase reliability of operation, the housing is provided with an additional axis for each leg, which is housed in an additional hole made in the leg, and that the apertures for the axes are in the form of the groove and raspolo- .. wife at an angle to the vertical axis of the device. Sources of information taken into account in the examination 1. USSR author's certificate number 583277 cl. E 21 B 7/28, 1973.

2. USSR author's certificate number 481689, cl. E 21 B 7/28, 1978.