SU1647127A1 - Borehole hydraulic pulsing device - Google Patents

Abstract

The invention relates to the investigation of boreholes by transmitting measurement signals from the well to the surface. The purpose of the invention is to control the design of the device and measure the axial load (OH) on the roller at a constant flow rate of flushing fluid. For this device includes a sensor housing 1 with hydraulic

Description

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a turbine 2 for closing the holes conducting the flushing fluid with a frequency proportional to the value of the measured parameter; In the housing 1 a shaft 4 with holes 5–9 for the flushing fluid is installed with the possibility of longitudinal displacement. On the shaft 4 a spring 12 is installed - Megzen shaft 4, depending on the OH on the bit. During its movement to the bottom, the washing liquid passes through two streams through openings 6 and 7, and the streams are combined and through

versts 8 fall into the holes 9. When the OH changes, the shaft 4 moves, which leads to a change in the cross section of the hole 6. As a result, the flow of liquid through the hole 6 changes, the frequency of rotation of the turbine 2 covering the hole 8 changes. Since the frequency of hydraulic pulses is determined by the frequency blocking the holes 8, the frequency of the hydraulic pulses will vary in proportion to the change in the OH value per bit, 1 ° C. f-ly, 1 ill.

The invention relates to drilling, in particular to the study of drilling wells by transmitting measurement signals from the well to the surface, and can be used in mining as well as in construction.

The purpose of the invention is to simplify the design of the device and measure the axial load on the bit at a constant flow rate of washing liquid.

For this purpose, a shaft with openings for flushing fluid is installed in the housing of the hydro-pulse device, which has the possibility of longitudinal movement, and a spring defining axial movement of the shaft, depending on the magnitude of the axial load on the bit,

The drawing shows the pulse device.

The device comprises a sensor body 1 with a hydraulic turbine connected through adapters 3 to a drill pipe, shaft 4 with holes 5–9, rigidly connected at one end through an adapter to a drill pipe column, or with a core pipe during core drilling, or with a rock-destroying tool for coreless drilling, and the other end is connected with a stubborn adjusting nut 10, which prevents longitudinal movement of the shaft when the projectile is raised and due to its abutment against the adjusting nut 11. The last Adjusts the compression of the spring 12, which, in turn, adjusts the axial movement of the shaft depending on the size

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axial load on the bit. A sealing gland 13 is fixed on the shaft with a hole from losses of flushing fluid in the downhole hydroimpulse device. It is secured with nuts 14. The sensor housing has an opening 15 for flushing flushing fluid out of the opening 6. The area of the latter depends on the amount of downhole axial load on the bit. When it is enlarged, the spring 12 is compressed, which leads to axial movement of the shaft and, consequently, a reduction in the cross-sectional area between the holes 6 and 15. Behind the hydraulic turbine in the sensor housing there is a turbine space 16 in which the flushing fluid flows from the channels 6 , 15 and 7, from which the flushing fluid flows into the hole 8 and further through the channel 9 exits the sensor.

Borehole impulse device operates as follows.

During the drilling process, the flushing fluid, moving from the mud pump through the drill pipe string to the bottomhole, passes through the channels of the downhole hydropulse device. At the same time, the flushing fluid flow is divided into two flows, one of which goes to the rotation of the hydraulic turbine 2 through channels 6 and 15, and the other goes to 7 into the turbine space 16, where both flows are connected and in channels 8 and 9 from the gkn in other hydropulse device. While rotating turbi

2, channel 8 is periodically blocked, which creates hydraulic pulses in the washing liquid column, which are sensed by a surface pulse counter. During drilling, the load on the rock-breaking tool is transmitted to the shaft with holes, which compresses the spring and moves in proportion to the magnitude of the axial load. Moving the bollard relative to the sensor body leads to a change in the cross section between holes 6 and 15, which, in turn, leads to a change in the flow rate of the washing fluid going to the rotation of the hydraulic turbine 2. A change in the flow rate of the discharge liquid changes the frequency of the spinner. turbines 2 and, as a result, the frequency of transmitted hydraulic pulses. Consequently, the frequency of the hydroimpulse on the surface is proportional to the transverse axial load, measured by

Editor A. Kozoriz

Compiled by R.Loginov Tehred L.Oliynyk

Order 1383

Circulation 379

VNIIL of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035

Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101

1647127

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borehole pulse device.

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Claims (1)

Invention Formula Downhole impulse device including body, sensor c. a hydraulic turbine to close the channels conducting the flushing fluid with a frequency proportional to the value of the measured parameter, characterized in that, in order to simplify the device design and measure the axial load on the bit at a constant flow rate of flushing fluid, holes for flushing fluid, with the possibility of longitudinal movement, and a spring mounted on the shaft to adjust the amount of axial movement of the bollard, depending on the load on the bit. Proofreader L. Patay Subscription