SU891882A1 - Combination earth-drilling bit - Google Patents

Description

The invention relates to the drilling of wells, namely, to drill bits.

Known drill bit containing crowbars with pins on which mounted with the possibility of rotation of the cutter [1].

A disadvantage of the known bit is its unsatisfactory work in the rocks moving around the fortress.

Also known is a combined drill bit ¹¹ containing a paw, on the trunnion of which a rotating cone, a paw with a cutter and an adapter are installed [2].

The disadvantage of this bit is that its design does not allow ^{one to} regulate the relative position of rock cutting elements by their height and replace worn working bodies without violating the integrity of the bit.

Nel invention is to regulate the relative position of the paws in the axial direction and ensure the change of cone.

This goal is achieved by the fact that a protrusion is made in one of the paws, and a corresponding groove is made in the other paw, while the paws are connected to each other and the adapter by a threaded connection, the adapter is equipped with an adjusting gasket installed on the end of one of the paws, and the pin is freely installed in her axial finger with a head that fixes the cone on the pin and abuts against the side surface of the cutter.

In FIG. 1 shows a combined bit, general view; in FIG. 2 is a section AA in FIG. 1.

The bit contains an adapter 1 with a thread 2, paws 3 and 4. The paw 3 has a pin 5 with a sleeve 6, on which the roller cone 7 is mounted, fixed on the pin with an axial fixing finger 8 with a head 9. The paw 4 has a rubber insert 10, into the side surface of which rests on the head 9 of the fixing finger 8. In the paw 3 there is a protrusion 11

This corresponds to the groove in dad 4.

Between the end face of the father 4 and the adapter 1 is installed shim 12

Before starting drilling, depending on the properties of the rocks being drilled, a paw with a cutter is set ahead of or behind the paw with a cutter. When the breeds are soft, dad is set ahead of the curve (Fig. 1). To drill medium hard rocks, the torpas of rock-cutting elements can be installed at the same level. When drilling strong abrasive rocks ahead of the set paw with cone,

Due to the detachability of the housing and the free installation of the cone, the interchangeability of parts that fail. _m. So, for example, can be replaced by any of the paws 3 and 4, the sleeve 6, the roller cutter 7 finger 8 and sharpening the cutting insert 10, which is offset in the bit to the center, which increases its wear resistance.

I

s.

891882 ₄

Claims (1)

The invention relates to the drilling of wells, namely drilling bits. A drill bit is known that contains chisels with trunnions on which roller cone 1 is mounted with rotation. A disadvantage of the known chisel is its unsatisfactory operation in rocks moving along a fortress. It is also known to have a combined drill bit containing a paw, on the pivot of which a rotating cone is installed, a paw with a cutter and an adapter. The disadvantage of this bit is that its construction does not allow adjusting the relative position of the rock-breaking elements along their height and replacing worn-out workers. without disturbing the integrity of the bit. The purpose of the invention is to regulate the relative position of the paws in the axial direction and to ensure uiaponiKH shift. This goal is achieved by having a protrusion in one of the paws, and a corresponding groove in the other paw, while the legs are connected to each other and the adapter with a threaded connection, the adapter provided with an adjusting shim mounted on the end of one of the legs, and the pin is provided with an axial pin freely mounted therein with a head fixing the roller cutter on the axle and abutting against the lateral surface of the tool. FIG. 1 shows a combined chisel, general view; in fig. 2 shows section A-A in FIG. 1. The chisel contains an adapter 1 with a thread 2, feet 3 and 4. Paw 3 has a pin 4 5 with a sleeve 6 on which a roller cutter 7 is installed, fixed on the axle with an axial fixing finger 8 with a head 9. The paw 4 has a rubber insert 10 in the side the surface of which rests against the head 9 of the fastening pallad 8. In the paw 3, a protrusion 11 is made, to which a groove in the pole 4 corresponds. Between the end of the pole 4 and the adapter I there is an adjusting gasket 12 Before starting the drilling, depending on the properties of the rocks drilled, the father with the cutter is installed ahead of time or lagging behind Relative paws with a roller cutter. When the rocks are soft, the paw is established with the lead (Fig. 1). For drilling of medium hardness rocks, the torpes of rock-dragging elements can be installed on the same level. During drilling of strong abrasive rocks, a paw with a roller cutter is mounted with a wire. Thanks to the separability of the cortus and the free installation of the roller cutter, replacement of the parts that have been made is achieved. For example, bar ba from paws 3, 4, sleeve 6, roller cone 7, finger 8 can be replaced sharpening the cutters of the U insert, which in the bit is mixed to ivr / u, which increases its wear resistance. 2 Claims of the invention Combined drill bit containing a paw, on the trunnion of which is installed a cutting pin with a roller cutter, a paw with a cutter and an adapter, characterized in that in order to adjust the relative position of the paws in the axial direction and ensure the shiftability of the cone, in one of the paws a protrusion is made and in the other paw there is a corresponding groove, while the paws are connected to each other and the adapter by a threaded connection, the adapter is equipped with an adjusting pad mounted on the end of one of the paws, and the pin is equipped with a freely installed her finger with the axial head fiksnruyushey Gná roller cutter journal and abutting the side pszherhnost cutter. Sources of information that are considered in the examination 1. Roller bits and drill heads. M., NINTIHIMNEFTEMASH, 1973, p. 10, 2, US Patent No. 2297157, CL, 175-336, 1952.