UA7735U - Appliance for wells drilling - Google Patents

Abstract

The appliance for drilling wells has installed concentrically outer and inner pipes with cutting elements fixed at one of the ends of the pipes, and with tail element on the other one, and elements for feeding and discharge of cooling liquid. Between the outer and the inner pipes with a gap with respect to the cutting elements at least one pair of longitudinal partitions is installed, those are displaced in circular direction one with respect to another. Between those the chambers for cooling liquid supply and discharge are formed, those are connected to the elements for supply and discharge of cooling liquid.

Description

Description of the invention

The useful model refers to tools intended for drilling wells in concrete, in solid rocks, 2 where the use of liquid for cooling the rock-breaking tool is not allowed and can be used. for example, in the conditions of the "Shelter" facility of the Chernobyl nuclear power plant or at other nuclear facilities, in construction, mining industry.

When drilling wells in the specified industries using a rotary method with a hard alloy, and especially a diamond tool, water is applied to the wellbore in order to cool the tool and remove 70 products of rock destruction. In the absence of such cooling, the drilling tool wears out quickly.

However, we do not know technical solutions that allow rotary drilling in concrete and in hard rocks continuously and simultaneously without supplying liquid to the hole.

A well-known device for drilling wells | see collection M of the international conference "Rock-crushing and metal-working tools - technique and technology of its manufacture and use", Kyiv, 2002, art. 120-121) 72 has a cutting element, the end of which is opposite to the working one, exits into the cavity. Water is supplied to the same cavity through one of the nozzles, which washes the cutting element, cools it and is removed through the second nozzle.

In this prototype, the cooling of the tool during operation is carried out from the inside without supplying liquid to the punch. But the considered prototype has several significant shortcomings.

First, water. which is served for cooling and that. which has already taken away heat from the cutting element, are not separated separately, but are mixed together in a common cavity, due to which the cooling efficiency decreases.

Secondly, you can use this device for drilling only for the distance of the cutting elements.

Thirdly, it has no means to remove the products of rock destruction. therefore, the drilling process cannot be productive.

Fourthly, the cooling of the cutting elements is carried out exclusively from the inside, i.e. it is single-circuit and therefore limited. -at

The device for drilling wells, which is used in geological prospecting practice, is the closest in terms of technical substance to the claimed useful model, see A.S. Volkov, B.P. Dolgov. Rotary drilling of exploratory wells. M., "Nedra". 1988 p.212-213), which contains concentrically installed outer and inner pipes with cutting elements fixed on one of the ends of the pipes, and on the other - a shank o (adapter), intended for connection with a column of drill pipes and through them with a drive rotation and vertical movement of the device, as well as elements of supply and removal of coolant. This device is a so-called double column projectile. in which the liquid for cooling the tool and removal of rock destruction products is supplied through a cavity between two coaxial pipes. uh-

This device also does not allow rotary drilling in concrete and in hard rocks continuously without 325 supplying fluid to the hole.

The useful model is based on the task of improving the device for drilling wells, in which, due to the introduction of longitudinal partitions between the outer and inner pipes, it is possible to conduct rotary drilling on concrete and in solid rocks continuously without supplying fluid to the hole. 8

To solve this problem, the device for drilling wells, which contains concentrically installed external and internal pipes with cutting elements fixed on one of the ends of the pipes, and on the other - with a shank intended for connection with the drive of rotation and vertical movement of the device, as well as

From" elements of supply and removal of coolant, according to a useful model, at least one pair of longitudinal partitions, displaced in the circular direction relative to each other with the formation of chambers for supply and removal of coolant, are installed between the outer and inner pipes with a gap relative to the cutting elements. connected, respectively, with the elements of supply and removal of the cooling liquid, 7 is optimal in this case when the cutting elements are rock-destructive elements of the drill bit, which is connected to the mentioned pipes, the shank has at least one through channel that goes to the cavity of the inner pipe, connected on the opposite side to the air suction device, it is equipped with several pairs of longitudinal partitions according to the number of cutting elements, longitudinal partitions in each pair and pairs of partitions between 4 20 are installed symmetrically, and cutting elements fixed on one of the ends of the pipes with their non-working ends, they go into the coolant supply and removal chambers.

The cause-and-effect relationship between the set of features that is claimed and the technical results achieved during its implementation is as follows.

As a result of the formation of separate chambers for the supply and removal of the coolant, the latter cannot simply

So" mix in the upper part of the device and go out through the liquid removal elements, and moves to the cutting elements, where it absorbs heat, as a result of which their wear resistance increases.

Due to the fact that the cutting elements with their non-working ends (opposite to the cutting ones) go into the chamber for supplying the coolant, their cooling is even more improved, which contributes to increasing the stability of the tool. 60 The improvement of the cooling of the cutting elements is also facilitated by equipping the proposed device with several pairs of longitudinal partitions due to the introduction of supply chambers and the removal of the coolant to separate groups or each of the cutting elements, because the temperature gradient of the coolant increases along the route of the coolant supply - its removal.

The execution of a through channel in the shank, which goes to the cavity of the inner pipe and is connected to the air suction device, allows additional cooling of the cutting elements from the opposite ends relative to those. that are washed with coolant.

The drawings illustrate the proposed device, where Fig. 1 shows a general view of the device in section - Fig. 2 shows the cross section A-A in Fig. 1, and Fig. 3 shows the longitudinal section B-B in Fig. 1.

The device for drilling wells contains concentrically installed outer 1 and inner 2 pipes with cutting elements 3 fixed on one of the ends of the pipes, and on the other - a shank 4. intended for connection with the drive of rotation and vertical movement of the device, as well as supply and discharge elements coolant 5, b, respectively, made in the form of couplings, according to a useful model between the outer and inner pipes 1, 2 installed with a gap "a" relative to the cutting elements With at least one pair of 7/0 longitudinal partitions 7, installed symmetrically and offset in a circular direction relative to each other with the formation between them of chambers of supply "b" and outlet "c" of the cooling liquid, connected, respectively, with the elements of supply and removal of the cooling liquid 5, 6. The cutting elements C are made as rock-destroying elements of the drill bit 8, which rigidly connected to the mentioned pipes 1-2, the shank 4 has one through channel 9, which goes to the cavity of the inner pipe 2, connected to of the opposite side through the coupling 10 with the device /5 Air suction (not shown in the drawings).

The device works like this.

Before starting work, the device is connected to a rotation drive, as such a drilling machine is used, which can provide rotary drilling with mode parameters such as rotation speed, axial force and feed rate within the limits that depend on the material of the cutting elements C and the physical properties of the rock .

With the start of drilling, connect the water supply network with the elements of supply and removal of coolant 5, b and turn on the dust extractor. The water supplied from the water supply network through the hose enters through the coolant supply element b into the intertube cavity "b", under pressure moves down to the cutting elements C, washes part of them, passes under the longitudinal partitions 7, washes other cutting elements C and. after removing a certain part of the heat, "v" rises up through the intertube cavity, where it exits through the cooling fluid outlet b. This is how cooling of the cutting elements C takes place without supplying water to the punch, and air suction from the central cavity of the inner pipe 2 is carried out with the help of a compressor or a vacuum cleaner through a through channel 9 that goes to the cavity of the inner pipe 2, connected on the opposite side through a coupling 10 At the same time, decompression is created in the central cavity of the inner pipe 2 and air from the environment is drawn into it. Air during drilling enters the gap between the well wall and the outer surface of the pipe 1, moves down to the cutting elements 3, washes them, passing through the grooves between the latter into the central channel, rises up and exits through the coupling 10 M. On its way, the air captures particles of the destroyed rock and carries them to the dust collector (not shown in the drawings). The latter allows you to conduct the drilling process continuously and therefore it will contribute -

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Claims (6)

The formula of the invention is not) c 1. A device for drilling wells, containing concentrically installed external and internal pipes with "" cutting elements fixed on one of the ends of the pipes, and on the other - a shank intended for " connection with the drive of rotation and vertical movement of the device, as well as coolant supply and removal elements, which is characterized by the fact that at least one pair of longitudinal partitions is installed between the outer and inner pipes with a gap relative to the cutting elements, displaced in the circular direction relative to each other with the formation of coolant supply and removal chambers between them, connected, -I, respectively, with elements of supply and removal of coolant. 2. The device according to claim 1, which is characterized by the fact that the cutting elements are rock-destroying elements of the drill bit, which is connected to the mentioned pipes. "claim 20 Z. The device according to claim 1, which is characterized by the fact that the shank has at least one through channel leading to the cavity of the inner pipe, connected on the opposite side to the air suction device. 4. The device according to claim 1, which differs in that it is equipped with several pairs of longitudinal partitions according to the number of cutting elements. 5. The device according to claim 1, 4, which differs in that the longitudinal partitions in each pair and the pair of ST 55 partitions are installed symmetrically. 6. The device according to claims 1, 2, which differs in that the cutting elements attached to one of the ends of the pipes protrude with their non-working ends into the coolant supply and outlet chambers. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated 60 microcircuits", 2005, M 7, 15.07.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. b5