SU883324A2

SU883324A2 - Fishing tool

Info

Publication number: SU883324A2
Application number: SU802901895A
Authority: SU
Inventors: Евгений Николаевич Гончаревский; Дмитрий Андреевич Кудимов; Николай Федорович Калмыков; Сергей Николаевич Щелочков
Original assignee: За витель
Priority date: 1980-03-28
Filing date: 1980-03-28
Publication date: 1981-11-23

Description

Изобретение относится к бурению нефтяных и газовых скважин, а именно к устройствам для извлечения посторонних предметов из скважины.The invention relates to the drilling of oil and gas wells, and in particular to devices for extracting foreign objects from the well.

По основному авт.св. № 713983 известен ловильный инструмент, содержащий переводник, узел держания и захвата, выполненный в виде спирапи, направляющий конус, причем узел удержания выполнен в виде упругого элемента, который размещен между переводником и направляющим конусом [1].By main auto No. 713983 a fishing tool is known comprising a sub, a holding and gripping unit made in the form of a spiral, a guide cone, the holding unit being made in the form of an elastic element that is placed between the sub and the guide cone [1].

Недостатком ловильного инструмента является невозможность определения момента фиксации извлекаемого предмета, например лома в узле, удержания устройства.The disadvantage of the fishing tool is the inability to determine the moment of fixation of the recoverable item, such as scrap in the site, holding the device.

Цель изобретения - повышение надежности захвата лома узлом удержания.The purpose of the invention is to increase the reliability of the capture of scrap node retention.

Поставленная цель достигается тем, что ловильный инструмент снабжен поршнем, а в переходнике выполнены боковые промывочные каналы, при этом поршень размещен между боковыми промывочными каналами и узлом удержания, а в последнем по оси выполнено отверстие.This goal is achieved by the fact that the fishing tool is equipped with a piston, and side flushing channels are made in the adapter, while the piston is placed between the side flushing channels and the holding unit, and a hole is made in the latter along the axis.

На фиг.1 изображен общий вид ловильного инструмента в разрезе; на фиг.2 - устройство в рабочем положении.Figure 1 shows a General view of a fishing tool in section; figure 2 - the device is in the working position.

Ловильный инструмент состоит из переходника 1, ниже которого размещен направляющий конус 2 и захват 3, выполненный в виде спирали; между переходником 1 и направляющим конусом 2 размещен узел удержания 4, выполненный в виде упругого элемента и имеющий центральный канал 5, диаметром меньше диаметра лома. Переходник 1 имеет каналы 6. Над узлом удержания 4 установлен поршень 7 и фиксатор ₂₀ 8. В направляющем конусе 2 выполнены радиальные каналы 9, которые предназначены для снижения поршневого эффекта при спуске инструмента в скважину, заполненную промывочным растз 883324 вором. В переходнике 1 выполнены ка налы 6, через которые затрубное пространство скважины сообщается с внутренней полостью бурильных труб, что позволяет производить промежуточные промывки ствола скважины.The fishing tool consists of an adapter 1, below which there is a guide cone 2 and a gripper 3 made in the form of a spiral; between the adapter 1 and the guide cone 2 there is a holding unit 4, made in the form of an elastic element and having a Central channel 5, with a diameter less than the diameter of the scrap. The adapter 1 has channels 6. A piston 7 and a retainer ₂₀ 8 are installed above the holding unit 4. Radial channels 9 are made in the guide cone 2, which are designed to reduce the piston effect when the tool is lowered into a well filled with a flushing rastz 883324 thief. Channels 6 are made in adapter 1, through which the annulus of the well communicates with the internal cavity of the drill pipes, which allows intermediate flushing of the wellbore.

Ловильный инструмент по извлечению ломов из скважины работает следующим образом.A fishing tool for removing scrap from a well works as follows.

Собранное устройство на бурильных трубах опускается в скважину. Не доходя 2-3 м до забоя, бурильные трубы начинают проворачивать с одновременным спуском и промывкой. При помощи захвата 3 верхний конец лома заходит во внутрь направляющего конуса 2, имеющего гладкую боковую поверхность, скользит по ней и доходит до узла удержания 4, проходит через центральный канал 5 упругого элемента, имеюудержания позволяет избежать рваного разрыва упругого элемента и повысить надежность удержания лома. Отсутствие повышения давления в нагне5 тательной линии буровых насосов свидетельствует о том, что ловильный инструмент прошел мимо лома. В этом случае инструмент поднимают на 2-3 м от забоя и операцию повторяют.The assembled device on the drill pipe is lowered into the well. Not reaching 2-3 m to the bottom, the drill pipes begin to turn with simultaneous descent and flushing. Using gripper 3, the upper end of the scrap enters the interior of the guide cone 2, having a smooth lateral surface, slides along it and reaches the holding unit 4, passes through the central channel 5 of the elastic element, and the holding allows avoiding torn rupture of the elastic element and increasing the reliability of holding the scrap. The absence of pressure increase in the discharge line of the mud pumps indicates that the fishing tool passed by the scrap. In this case, the tool is raised 2-3 meters from the bottom and the operation is repeated.

Использование предлагаемого ловильного инструмента для извлечения ломов из скважин позволяет сократить до минимума число спуско-подъемных операций по сравнению с другими οποί 5 собами извлечения.The use of the proposed fishing tool for the extraction of scrap from wells allows you to minimize the number of tripping operations compared to other 5 recovery units.

Claims

The invention relates to the drilling of oil and gas wells, and specifically to devices for extracting foreign objects from the well. According to the main auth. No. 713983 is known a fishing tool containing a sub, a holding and gripping grip made in the form of a spiral, a guide cone, and the holding unit is made in the form of an elastic element that is placed between the sub and the guide cone. The disadvantage of the fishing tool is the impossibility of determining the moment fixing a retrievable item, such as a scrap in a node, holding the device. The purpose of the invention is to increase the reliability of seizure of scrap by the holding unit. The goal is achieved by the fact that the fishing tool is equipped with a piston, and in the adapter there are side industrial channels: the piston is placed between the side flushing channels and the holding unit, and the hole is made in the latter. Figure 1 shows a General view of the fishing tool in the section; figure 2 - the device in the working position. The fishing tool consists of an adapter 1, below which is placed the directional cone 2 and the grip 3, made in the form of a spiral; Between the adapter 1 and the direction KGRGM with the cone 2 is placed the holding unit 4, made in the form of an elastic element and having a central channel 5, with a diameter less than the diameter of the scrap. Adapter 1 has channels 6. A piston 7 and a retainer 8 are installed over the holding unit 4. Radial channels 9 are made in the guide cone 2, which are designed to reduce the piston effect when the tool is lowered into the well filled with flushing screen. 6, through which the annulus of the well communicates with the internal cavity of the drill pipe, which allows for intermediate washing of the wellbore. The fishing tool for extracting scrap from a well works in the following way. The assembled drill pipe device is lowered into the well. No income 2-3 m to the bottom, the drill pipes begin to turn with simultaneous descent and flushing. With the help of the grip 3, the upper end of the scrap enters the inside of the guiding cone 2, which has a smooth side surface slides over it and reaches the holding unit 4, passes through the central channel 5 of the elastic element having a diameter less than the diameter of the scrap; this element is scraped and held. Further lowering of the fishing tool causes the upper end of the scrap to abut the spherical surface of the piston 7 and push it up to close the side channels 6 of the adapter 1. Judging by the pressure increase in the discharge line of the mud pumps, the scrap is fixed in the holding unit A The central channel 5 in the containment unit avoids a torn tear of the elastic member and increases the reliability of the scrap retention. The absence of an increase in pressure in the discharge line of the mud pumps indicates that the LOVILY tool has passed the scrap. In this case, the instrument is raised 2-3 m from the bottom and the operation is repeated. The use of the proposed catch tool for extracting scrap from a well reduces the number of tripping operations to a minimum compared with other extraction methods. Claims of the invention Fishing instrument according to ant.ev. No. 713983, characterized in that, in order to increase the reliability of scrap capture by the holding unit, it is provided with a piston, and side flushing channels are provided in the adapter, the piston is placed between the side washing channels and the holding node, and an opening is made in the latter. The source of information taken into account in the examination 1., USSR Author's Certificate No. 713983, cl. Е 21 В 31/02, 1977.