BOREHOLE PLUGGING DEVICE

• US 20200132424A1
• Filed: 12/19/2017
• Published: 04/30/2020
• Est. Priority Date: 02/13/2017
• Status: Active Grant

• Current Assignee: Mining Technologies Rt JSC
• Original Assignee: Mining Techjologiesrtjsc
• Inventors: Shustov, Aleksejj Niklaevich
• Granted Patent: US 11,976,913 B2
• Time in Patent Office: Days
• CPC Class Codes: E21B 33/12 Packers; Plugs used for cementing E21B33/134, E21B33/16
• CPC Class Codes: F42D 1/18 Plugs for boreholes

Abstract

The invention relates to the field of drilling and blasting operations, and more particularly to confining gaseous explosion products in a charge cavity, and can be used in rock blasting using borehole charges. The technical result of the invention is that of reducing the specific charge of explosive per cubic metre of blasted rock mass, increasing the fragmentation of the rock mass, making it possible for explosive to be loaded into and work effectively in a borehole with excess water pressure (flooded boreholes), providing ease of use and structural simplicity, providing ease of transportation and storage since the device can be dismantled to compact dimensions, and reducing the weight of the structure. A further technical result is the possibility of using devices of a single type in boreholes of different lengths and types (flooded or non-flooded), thus making it possible for the claimed device to be used as a universal device for all types of boreholes. The above-mentioned technical result is achieved in that the claimed borehole plugging device, which is made of a pliable polymer material and has elements with a shape, the outside diameter of which is commensurate with the diameter of a borehole, and an axial internal cavity, is characterized in that it consists of a rod with a cruciform cross section, having identical dome-shaped, slotted elements fixably mounted thereon from each end.

Claims

1. Borehole plugging device is made of pliable polymer material and features shaped elements the outer diameter of which is commensurate with the borehole diameter, with an axial inner cavity consisting of a rod with cruciform cross-section, on both ends of which uniform dome-shaped elements with slots can be fixed.

2. Borehole plugging device similar to that of pos. 1 with a difference that the dome-shaped elements feature flanges by means of which and a retainer they are fixed in the dents formed in the rod.

3. Borehole plugging device similar to that of pos. 1 with a difference that the dome-shaped elements have lobe form.

4. Borehole plugging device similar to that of pos. 3 with a difference that the lobes are of varying length with arrangement of each long lobe between the shorter ones.

5. Borehole plugging device similar to that of pos. 1 with a difference that there are 2 to 4 dome-shaped elements fixed on the rod.

6. Borehole plugging device similar to any of pos. from 1 to 5 with a difference that the dome-shaped elements feature symmetrical arrangement of the slots.