RU65572U1 - CORE DRILL - Google Patents

Abstract

The proposal relates to techniques for drilling large diameter wells, in soft and rocky soils, mainly for the construction of building foundations and supports.

The technical result, which this technical solution is aimed at, is to increase the drilling speed, mainly of large diameter wells, as well as to increase the efficiency of extraction of cuttings from the bottom.

A core drill includes a housing 1, an external core collection pipe 2 and an internal core collection pipe 3 located coaxially with the external core collection pipe, and a core ejection device 4 containing disks 5 and 6. The internal core collection pipe is made with vertical slots 7, in which a jumper 8 is placed connecting the disks 5 and 6 of the device 4 for ejecting the core. Core receiving pipes 2, 3 are made with rock cutting elements 9.

The core drill is equipped with a locking mechanism for the core ejection device 4 relative to the housing 1, which is made in the form of a spring-loaded pusher 10 connected to the upper part of the device 4 with the upper 11 and lower 12 lugs and eyelets 13, and pivotally secured by the axis 14 in the latch housing 1 with 15 sec the locking element 16 and the drive lever 17. The locking element 16 is made with the possibility of engagement with the eye 13, and the drive lever 17 with the possibility of interaction with the stops 11, 12 of the pusher.

Description

The proposal relates to techniques for drilling large diameter wells, in soft and rocky soils, mainly for the construction of building foundations and supports.

Known core drill, comprising a housing, an external core receiving pipe with rock cutting elements, a device for pushing core containing a disk [1].

However, the known device is not effective when drilling large diameter wells in rocks, since in many cases it is impossible to tear the core and remove it from the bottom. Therefore, it is necessary to use heavier, more powerful, and, consequently, more expensive machines, which makes the drilling process more expensive. In addition, the often drilled core under the weight of the device for ejecting the core falls to the bottom.

The technical result, which this technical solution is aimed at, is to increase the drilling speed, mainly of large diameter wells, as well as to increase the efficiency of extraction of cuttings from the bottom.

This result is achieved due to the fact that the core drill, comprising a housing, an external core receiver pipe with rock cutting elements, a core ejection device containing a disk, is provided with at least one internal core receiver pipe placed coaxially to the external core receiver pipe, the core ejection device is provided an additional disk located in the inner core receiver pipe, the inner core receiver pipe being made with vertical slots, and the device disks for ejecting Nia cores interconnected by webs arranged in the slots.

The specified result is also achieved due to the fact that the core drill is equipped with a mechanism for fixing the device for ejecting the core. The locking mechanism is made in the form of a spring-loaded pusher connected to the upper part of the core extrusion device with upper and lower stops and eyes, as well as a latch pivotally mounted in the housing with a locking element and a drive lever, the locking element being made to engage with the eye and the drive lever - interactions with pusher stops.

An embodiment of the invention is described below with reference to the accompanying drawings, in which Fig. 1 depicts a longitudinal section of the device, Figs. 2, 3 are sections A-A and B-B, respectively, and Fig. 4 is a fixation mechanism of a core ejection device.

Description of a preferred embodiment of the invention.

A core drill includes a housing 1, an external core collection pipe 2 and an internal core collection pipe 3 located coaxially with the external core collection pipe, and a core ejection device 4 containing disks 5 and 6. The internal core collection pipe is made with vertical slots 7, in which a jumper 8 is placed connecting the disks 5 and 6 of the device 4 for ejecting the core. Core receiving pipes 2, 3 are made with rock cutting elements 9.

The core drill is equipped with a locking mechanism for the core ejection device 4 relative to the housing 1, which is made in the form of a spring-loaded pusher 10 connected to the upper part of the device 4 with the upper 11 and lower 12 lugs and eyelets 13, and pivotally secured by the axis 14 in the latch housing 1 with 15 sec the locking element 16 and the drive lever 17. The locking element 16 is made with the possibility of engagement with the eye 13, and the drive lever 17 with the possibility of interaction with the stops 11, 12 of the pusher.

The device operates as follows.

At the beginning of drilling, the device for expelling core 4 under the influence of its weight is on the surface of the bottom. As drilling, it, along with the core rises relative to the outer 2 and inner 3 core-receiving pipes up. When filling core drilled pipes with spring, the spring-loaded pusher 10 acts with its lower stop 12 on the drive lever 17 of the fixing element 16, and the latter pivots about axis 14. At the same time, the latch 15 clings to the eye 13, fixing the core ejector 4 relative to the housing 1. After lifting the core drill, apply force to the pusher, and it moves downward, overcoming the force of the spring 18. In this case, the upper stop 11 of the pusher 10 acts on the drive lever 17, as a result of which the drive lever of rotation ivaetsya about an axis 14, freeing the apparatus for ejecting the core 4 and the core is extruded from the outer 2 and the inner core tube 3.

Thus, this technical solution will allow:

- increase the drilling speed of large diameter wells by ensuring the complete removal of cuttings from the bottom;

- to drill large diameter wells with lighter machines, which ensures cheaper drilling process.

The source of information

Prospectus of the company Carandina, http://www.carandina.com/prodotti/carotieri/carotieriuk.htm, 05/11/2006

Claims (3)

1. Core drill, comprising a housing, an external core collection pipe with rock cutting elements, a core ejection device, comprising a disk, characterized in that it is provided with at least one coaxial external core collection pipe, an internal core collection pipe, the core ejection device is provided an additional disk located in the inner core receiver pipe, the inner core receiver pipe having vertical slots, and the disks of the core ejection device are connected to dy is placed through the slots in the webs. 2. The core drill according to claim 1, characterized in that it is equipped with a mechanism for fixing the device for ejecting the core relative to the housing. 3. The core drill according to claim 2, characterized in that the locking mechanism is made in the form of a spring-loaded follower connected to the upper part of the core ejecting device with upper and lower stops and eyes, and a latch pivotally mounted in the housing with a locking element and also a driving lever moreover, the locking element is made with the possibility of engagement with the eye, and the drive lever interacts with the stops of the pusher.