SU1705536A1 - Reamer for blast holes - Google Patents

Abstract

The invention relates to the mining industry and mb used to expand the pre-drilled wells. The goal of ich .. pp is to increase the efficiency of drilling: d-wells of the bottomline with the simultaneous improvement of the oil pump; lball Pd .-:., Mp.i body includes ep. what are the impactors 7, fixed in kg.plentor I with drilling rig 3 and b If 1; having windows 23 to exit the nth bur. Each udg. Rnik 7 with its axle boxes is 1 °. butolen under total |, | 1 vr lm Lj, to the longitudinal Oh (, and ur | Z: - g o .. Windows 23 in the cage 1E iViJ .1 M, 1 pss: - eZhUTK IX URDU UDLG.. IK 1. In PrOC .. With robots spreader hvp; .parts 6, fixed with g.p.emm D, impactors 7 under the action;: reactions: n g ID- RONYS of the borehole wall tpnach iplyut- with laraplemo g - -; dg: .l and -jcn after fc .6 ill. G O)

Description

The invention relates to the mining industry and can be used to expand pre-drilled pilot wells,

The purpose of the invention is to increase the efficiency of drilling large diameter blastholes while simultaneously improving the bottom hole cleaning,

Figure 1 shows a blasthole reamer, a general view; FIG. 2 is a view along arrow A in FIG. Fig. 3 is a diagram of the impact of transverse forces on a drilling tool on a drilling tool; in fig. - scheme of loading and deformation of the impactors of the expander when interacting with the face; FIG. 5 is a diagram of the angles of rotation of the structural elements of a drummer, under load P; Fig 6 is a graph: i-: Bni.i, and the h of the drummer from load F,

Dilator for p ryrny - .. kz-pkin includes kolls-kti ;. 1 g of sugar nipple 2, which with. whether | - | en with the drill set 3. In ol. K, opt 1, central Gyrsty C and distribution channels 5 are made, and the compressed air from the drill rod enters the rear axle boxes 6 percussion bars fastened in the collector 1 and 7 shock bars 7. The impactors used in the expander consist of bodies 8 with impact mechanisms I. rear axleboxes 6 and front axleboxes 10 are connected by their shanks 11 by means of a yudatlin thread,

L

: l

about

&

in the form of a cylindrical spring 12, which, with its turns, enters the corresponding grooves in the connected elements. Front axles 10 with their front shanks 13 are connected by spring 12 to sleeves accommodating in the front part rotatably cups 15, in which, for example, by means of a bayonet connection, drill bits 16 are strengthened, affecting the bottom 17 in the well 18, 3 its bottom (behind the front bush 10) drummers 7

they are connected to each other using a yoke 19, to which a centralizer 20 is attached, which is included in the pilot well 21. The yoke 19 is connected to the collector 1 by means of studs 22 and has openings 23 for the removal of drill cuttings. 2k denotes the interaction area of the drill bit 16 with a face, position 25 — an unbalanced zone a-a of interaction of the crown with the wall of the well 18 and a face 17, position 26 — the fulcrum of the rear axle 6 in the collector 1; position 27 - point-tory of the front axle box 10 in the cage 14. Sipa P - the transverse force from the borehole wall l8 HC crown 16 and drummer 7, causing: support reactions

5p, respectively, about the points the width of the threaded part of the beech

CII Rd I

A and B, and sy. 1, - pass from support; And up to the indicator 28, measuring n:, by the distance h t, 1,) is the distance from the support B to the indicator 29, measuring the displacement hi; (Y t is the angle of rotation of the axle box 6 relative to the axis of the hammer 7 under load P; the angle of rotation of the drill bit 16 relative to the axis of the hammer under load P. Jf is the angle of rotation of the drill bit 16 relative to the axis of the expander (well 18) under load P „Position 30 - general displacement h of the drill bit 16 due to all the deformations perpendicular to the small pox of the expander (wells 1C) under load P, T is the resultant force of the crown 16 about the bottom 17.

The extender works as follows

The expander is fixed at the end of the drill rod 3 through the threaded nipple 2 of the manifold 1, in which

Q

5 0 0

five

five

0

45

50

using the yoke 19 and the studs 22, the percussion bars 7 are secured. Compressed air from the drill / rod 3 enters the percussion bars 7 through the central opening I of the collector 1 and the distribution channels 5. When drilling, the expander, with its centralizer 20, enters the pilot well 21, which provides direction - drilling and the straightness of the well 18. The centratorg can also be performed by the drummer located in the central part of the expander, which allows one-cycle well expansion, the removal of drill cuttings through the gaps between the the borehole 18 and the expander, as well as through special windows 23 made in the casing 19. The impactors, together with the axle boxes 10, are set i at an angle y to the longitudinal axis of the drill rod, which makes it possible to compensate for the curvature of the axes of the impactors and axes 10 caused by the shear force P , Initially, all the gaps in the flexible threaded connections are sampled - cylindrical springs 12, which are included in the grooves in the boxes 6 and 10, case 8 and sleeve 1, sleeve 1 and glass 15, the bayonet connection of the crown 16 and cup 15 and then elastic deformations occur in all the structural elements of the expander, up to balancing with the force P (see fig; 1 and 0 „

Claims (1)

Invention Formula Blast hole extender including drilling rig c. A valve with a collector, a yoke connected to the collector by studs, and peripherally mounted drummers with axle boxes and drill bits fixed in the axle boxes, placed with rear ends in the manifold, and kg. themselves in the cage, characterized in that, in order to increase the drilling efficiency of large diameter blast holes with simultaneous improvement of bottom cleaning, the impactors with axle boxes are installed at a total angle of 2-3 ° to the longitudinal axis of the drill rod, and in the cage there are windows located intervals between drummers. Phi I 9 22 75 17 BufiA / 23 2 L 6 fig4 102.9% 1000 2000 3000 PtA FIG 6