RU1819970C - Gage and method of its manufacture - Google Patents

Abstract

Usage: centering the drill string from the well and calibration of the walls of the well. SUMMARY OF THE INVENTION: The calibrator comprises a hollow body with through radial holes on the side surface located at an acute angle to the axis of the calibrator, the apex of which is directed toward the upper end of the body. In the openings of the housing are calibrated inserts in the form of a sleeve with a wear-resistant rod fixed in it. The sleeve is installed in the hole by means of a thread with the possibility of rotation. The working head of the insert has a conical shape with an angle at the apex of the cone equal to twice the angle of inclination of the hole to the axis of the calibrator. A through slotted groove is made in the bottom of the sleeve. In the manufacture of the calibrator, the sleeve is preliminarily fixed at the hole inlet with the bottom part inside. A technological tool is inserted through the open end of the sleeve into the slotted groove of its bottom and the sleeve is screwed into the opening of the housing. A wear-resistant rod is inserted into the sleeve and soldered in the sleeve. Flux, slag and gas are removed into the internal cavity of the body through the slit groove of the sleeve. 2 s, p. f-ly. 3 ill. ate

Description

The invention relates to a rock cutting tool used for calibrating and stabilizing wells for various purposes, as well as to a method for reinforcing a tool with wear-resistant elements,

The aim of the invention is to increase the life of the calibrator by automatically sliding the calibrating inserts out of the housing as they wear out. As a result of savings on abrasive materials, there is a general reduction in drilling costs.

In FIG. 1 shows a calibrator with a stepped pull-out, general view; in FIG. 2 section of calibrator case with calibrating element before installation in the rod socket, longitudinal section; from FIG. 3 - plot calibrator n contact with the wall of the well.

The calibrator comprises a housing 1 and calibrating elements 2. The housing 1 is made with an internal cavity 3 and with through inclined radial threaded holes 4. Elements 2 are made of a cylinder with an external thread and a head with a conical surface 5. At the top of the head, which is the working surface element 2, a wear-resistant rod 7 is fixed in the socket 6, there is a through-through in the bottom of the socket

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slotted groove 8, and the angle of the cone at the apex of element 2 is equal to twice the angle of inclination a of axis 9 of the threaded hole to axis 10 of housing 1. Using slot 8, into which a technological tool (not shown) is inserted, element 2 is secured to the housing 1 and the displacement of soldering waste into the cavity 3.

The calibrator is included in the layout of the bottom of the drill string and lowered into the well. During the operation of the calibrator, when the drill string rotates, its working surfaces wear out. The principle of calibrator self-regulation in diameter is to extend the elements 2 along the axis 9, which is associated directly with the wear of the rod 7 and the conical surface 5 when interacting with the wall 11 of the well. Thus, when the calibrator enters the narrowed section of the well, the surface 7 penetrates into the wall 11 of the well and destroys it, the caliber is squeezed to a nominal diameter. As the rod 7 wears, the conical surface 5 comes into contact with the wall 11. Due to the angle of the cone © at the top of the element 2 being equal to twice the angle of inclination of the hole 4, a snug fit to the wall 11 of the surface 5 over the entire length of its generatrix. friction forces, abrasion of the contacting surfaces occurs, and a reactive moment arises, which tends to rotate element 2 around axis 9 in the direction opposite to the projectile. When the thread winding direction of the element 2 is opposite to the rotation direction of the housing 1, the element 2 is turned out of the housing 1. The extension of the element 2 is accompanied by the wear of the surface 5 that is faster than the rod 7, which results in the self-sharpening of the element 2.

The wear of the calibrating elements and, consequently, their radial extension are directly proportional to the physicomechanical properties of the rocks, i.e. the micro wear of the calibrator in diameter is constantly compensated by the micro extension of the elements 1 from the housing 1 by the amount of wear.

The optimal tool working mode is determined by the design parameters of the calibrator (diameter and angle of the element, depth and thread pitch).

The installation of the calibrator with calibration elements is as follows.

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The blunt end of the element 2 is inserted into the hole 4 of the housing 1, then a technological tool is inserted through the slot 6 into the slot-groove 8 and the element 2 is screwed to a predetermined depth. A similar operation is carried out with all other elements. After that, wear-resistant rods 7 are installed in the nests and soldered by pouring solder into the annular cavities between the rods 7 and the walls of the nests 6. During soldering, the molten solder fills the gap between each rod 7 by the action of gravity and capillary forces the wall of the socket 6, and gases, flux and slag are displaced through the grooves 8 into the internal cavity 3 of the housing 1. This ensures high quality of the seam seam and, accordingly, reliable fastening of the rods 7 in the elements 2.

Claims (2)

1. A calibrator comprising a hollow body with radial holes on the side surface and calibrating elements installed in these holes as separate inserts, characterized in that, in order to increase the life of the calibrator by automatically moving the inserts out of the housing as they are wear, the holes in the housing are made through with an inclination towards the axis of the calibrator at an acute angle, the apex of which is directed towards the upper end of the housing, and each insert is made in the form of a sleeve with a wear-resistant rod fixed in it it is installed in the hole of the housing by means of a thread with the possibility of turning, while the working head of the insert has a conical shape with an angle at the apex of the cone equal to twice the angle of inclination of the hole to the axis of the calibrator, a through slotted groove is made in the bottom of the sleeve. 2. The method of manufacturing the calibrator according to claim 1, comprising mounting the inserts in the openings of the housing, characterized in that the sleeve with a through slot made in its bottom is pre-fixed at the entrance to the opening of the housing with the bottom inward, then through the open end of the sleeve into the slot the technological tool is inserted into its bottom, and the sleeve is screwed into the housing opening, and the wear-resistant core is inserted and soldered into the sleeve, while flux, slags and gas are discharged into the internal cavity of the housing through Spruce slot liner. 9ig. 2