SU1384715A1 - Downhole slurry breaker - Google Patents

Abstract

The invention relates to the mining industry and allows to increase the efficiency of crushing of sludge. The self-propeller includes a body 1 and spacing elements with cutters 3, made in the form of longitudinal faces (PG) 4. They form a truncated inverted pyramid. The incisors 3 are placed on one of the longitudinal halves of each PG 4. Sludge particles 8, 9 formed during drilling under the action of an upward washing agent rush up and wedge between the faces and walls of the borehole 6. Particles 8 of large sludge are crushed due to running on them longitudinal halves of PG 4 to particles 10 of the fine fraction passing freely in the annulus of the drill rod. 3 il. (L with 30: l

Description

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The invention relates to the mining industry, in particular, to devices for crushing sludge in the near-wellbore part of wells.

The aim of the invention is to increase the efficiency of crushing.

FIG. 1 shows a downhole slurry crusher, a general view, with the image of the contour of the borehole walls and large particles of sludge; FIG. 2 is a section A-A in FIG. one; in fig. 3 - diagram of the interaction of the plane of sludge crushers with large pshama particles during the rotation of the slime refractor .15

The sludge crusher is made in the form of a casing 1, the diameter of which is not less than the diameter d of the drilling rig 2 used (fig, 1) with sludge crushing elements with cutters 3, the slime-20 crushing elements are made in the form

Claims (1)

inclined faces 4, which form a truncated Formula of the invention of an inverted pyramid (Fig. 2), with the incisors 3 placed on one of the longitudinal halves 5 faces 4, 25 The downhole slurry crusher is placed in the well 6 directly behind the rock-breaking tool, for example a roller bit 7, The coarse fractions 8, 9 of the sludge particles are wedged in the annulus of the slurry puller when lifting from the bottom. The fine fractions of 10 pshama particles pass freely in the annulus of the drill rod. The work is carried out as follows. The particles of sludge 8, 9 formed in drilling (Fig. 1) under the action of an upward washing agent rush upward from the roller bit 7 into the annulus and wedge between the inclined edges 4 of the sludge crusher and the walls of the well 6. During the rotation of the slurry, the wedged particles of large sludge (Fig. 3) are crushed due to the running on them of the longitudinal halves 5, faces 4 to the size of fraction 10 (Fig. 1), which freely passes through the drill hole space. A downhole splitting cage comprising a body and slime-crushing elements with incisors, characterized in that, in order to increase crushing efficiency, the crumb-like elements are made in the form of longitudinal edges forming a truncated inverted pyramid, the incisors being placed on one of the longitudinal halves of each edge. It is free to pass in the annulus space of the drill rod. The work is carried out as follows. The particles of sludge 8, 9 formed in drilling (Fig. 1) under the action of an upward washing agent rush upward from the roller bit 7 into the annulus and wedge between the inclined edges 4 of the sludge crusher and the walls of the well 6. During the rotation of the slurry, the wedged particles of large sludge (Fig. 3) are crushed due to the running on them of the longitudinal halves 5, faces 4 to the size of fraction 10 (Fig. 1), which freely passes through the drill hole space. Invention Formula A downhole splitting cage comprising a body and slime-crushing elements with incisors, characterized in that, in order to increase crushing efficiency, the crumb-like elements are made in the form of longitudinal edges forming a truncated inverted pyramid, the incisors being placed on one of the longitudinal halves of each edge. VNIIPI Order 1116/25 Random polygons pr-tie, Uzhgorod, st. Project, 4 Fig.Z Circulation 531 Subscription