RU1802137C - Stand for modelling planetary drilling - Google Patents

Abstract

Usage: when drilling wells of large diameter. SUMMARY OF THE INVENTION: The stand includes a bed on which the table of the face is mounted for rotation. A brake mechanism is also mounted on the bed for braking the table of the face. A drive is located in the upper part of the bed in a longitudinal groove, which is rigidly connected through the shaft to the bit. The groove is located in a vertical plane passing through the axis of the drive perpendicular to the plane passing through the axis of the face table and the bit drive. In the longitudinal groove between the bed and the drive, axial force sensors are installed that record the axial shaft movements that occur when the bit rotates in a predetermined drilling mode. 2 ill.

Description

The invention relates to the drilling of large boreholes, and in particular to the construction of stands for modeling planetary drilling.

The aim of the present invention is to expand the functional technological capabilities of the bench by measuring the reactive moment from the bit.

Figure 1 is a perspective view of a bench for modeling planetary drilling; figure 2 is a section aa in figure 1.

The stand consists of a bed 1, on which a counter 3 is installed, which can be rotated on the bearings 2, to simulate a bottom hole. A brake mechanism 4 is also fixed on the bed 1, by which it is possible to load the table 3 of the head, producing its braking. A longitudinal groove 5 is made in the upper part of the bed 1, in which the drive 6 of the bit 7 is located. The drive 6 is spring-loaded with a spring 8 for

creating an axial load and is connected to the bit 7 by means of the shaft 9. The groove 5 in the frame is located in a vertical plane passing through the axis of the drive 6 perpendicular to the plane passing through the axis of the casing table 3 and the bit drive 6. In addition, in the longitudinal groove 5, between the bed 1 and the drive 6, an axial force sensor 10 is installed.

The operation of the stand is carried out as follows.

A rock sample is placed on the table 3 of the fence. A chisel 7 is fixed on the shaft 9 of the actuator 6. The mechanism for braking the table 4 is unloaded. The drive 6 is turned on, which drives the bit 7 at a predetermined frequency. Create on the bit 7. axial load. The rotating bit 7, acting on the table 3 of the face, causes it to rotate, overcoming the friction in the bearings 2, the parameters of the device are fixed00

about y

with

V4

the new technological drilling mode: rotational speed of the bit, rotational speed of the table, axial load on the bit. Then, the table 3 of the slab is gradually loaded using the braking mechanism 4. As the braking moment of the table 3 increases, the torque of the force on the bit 7 also increases. This moment is transmitted from the bit 7 to the shaft 9 in a vertical plane passing through the axis of the drive 6 perpendicular to the plane passing through the axis of the table 3 of the face and bit 7. In the same plane, in the groove 5 of the bed, axial force measuring sensors 10 are installed, which record the axial movements of the drive shaft 9. Table 3 is loaded with the braking mechanism 4 until it stops completely, at this point in time, the reactive moment on the bit 7 reaches It gives the maximum values. Then, a different drilling process was established and the experiment was repeated. Thus, it is possible to simulate the process of planetary drilling at this stand with registration of changes in the reactive moment that occurs on the bit under various drilling conditions. Reactive momentum research data can be used.

5

0

5

vans for the design of reactive turbine drilling aggregates. The frequency of the portable rotation of the RTB unit, which is one of the main parameters of the jet turbine drilling process, depends on the magnitude of the reactive moment.

Claims (1)

The claims A bench for simulating planetary drilling, including a bed, a counter table mounted rotatably on a bed, and a drive with a chisel installed in the groove of the bed eccentric relative to the center of the table, characterized in that, in order to expand the functional technological capabilities of the stand by measuring the reactive moment from the bit, it is equipped with a table brake mechanism and an axial force measuring sensor, while the groove in the bed is made longitudinal in a vertical plane passing through the axes rivoda perpendicular to the plane passing through the axis of the table and slaughtering the actuator and the sensor is located in a groove between the frame and the bit drive.