SU883365A1

SU883365A1 - Device for measuring flowrate of heat carrier in injection wells

Info

Publication number: SU883365A1
Application number: SU792870567A
Authority: SU
Inventors: Борис Манович Бреслав; Игорь Борисович Гутман
Original assignee: Азербайджанский институт нефти и химии им. М.Азизбекова
Priority date: 1979-10-30
Filing date: 1979-10-30
Publication date: 1981-11-23

Description

(54) СПОСОБ ОПРЕДЕЛЕНИЯ РЕЩМА РАБОТЫ ЭЛЕКТЮБУРА(54) METHOD FOR DETERMINING THE ELECTRUBE WORK TABLE

1one

Изобретение относитс к измерению неэлектрических величин и может быть испрль зовано дл определени зоны, в которой ра- . ботает электробур при бурении шарошечными долотами, в частности, дл определени критической угловой скорости долота.The invention relates to the measurement of non-electric quantities and can be eliminated to determine the zone in which it is. Electric drill while drilling with roller cone bits, in particular, to determine the critical angular velocity of the bit.

Известен способ определени режима работы электробура при бурении шарошечными долотами, включающий регистрацию забойных параметров. По зтому спосибу находитс максималы1а динамическа осева нагрузка нри работе электробура с данной угловой скоростью и сравниваетс со значением осевой статической нагрузки. Превышение второй над первой свидетельствует о работе электробура с докритическими угловыми скорост ми долота, а превышение первой над второй о работе электробура со сверхкритическими угловыми скорост ми долота 11 .There is a method for determining the operating mode of an electric drill when drilling with roller bits, which includes the registration of downhole parameters. In this way, the maximal dynamic axial load is found when the electric drill is operating at a given angular velocity and is compared with the value of the axial static load. The excess of the second over the first indicates the operation of the electric drill with subcritical angular bit rates, and the excess of the first over the second one of the electric drill with supercritical angular bit rates 11.

Недостаток известного способа заключаетс в том, что значени критической скорости вращени долота могут иметь погрешность по отношению к действительной величине критической скорости, соизмеримую с величинойThe disadvantage of this method is that the values of the critical speed of rotation of the bit may have an error with respect to the actual value of the critical speed, commensurate with the value of

последней, так как не учитываетс текущее значение внедрени зуба долота в породу, вли ние компоновки низа колонны и изменени сил сопротивлени . Вследствие этого определение зоны умботы электробура по этому способу может дать ошибочный результат.the latter, since it does not take into account the current value of the introduction of the tooth of the bit into the rock, the influence of the bottom column layout and the change in resistance forces. As a consequence, the definition of the zone of breakdown of the electric drill by this method can give an erroneous result.

Цель изобретени - повышение точности определени зоны работы электробура.The purpose of the invention is to improve the accuracy of determining the zone of operation of the electric drill.

Поставленна цель достигаетс тем, что измер ют отношение частоты пульсаций момен10 та на долоте от перекатывани шарошек с эуб на зуб к угловой скорости долота при докритическом ее значении и сравнивают это отношение с тактовым в процессе бурени , при этом по равенству указанных отношений This goal is achieved by measuring the ratio of the frequency of moment fluctuations on the bit from rolling the cones from eub to tooth to the angular velocity of the bit at its subcritical value and comparing this ratio with the clock one during drilling,

15 суд т о работе электробура в докритической зоне, а по уменьшению текущего значени отношени - в сверхкритической зоне.15 judges on the work of the electric drill in the subcritical zone, and to reduce the current value of the ratio - in the supercritical zone.

В качестве конкретного примера может служить способ определени зоны работы As a concrete example, the method of determining the working area

20 электробура посто 1шого тока.20 electric drills of constant current.

Claims

At a known subcritical bit rate, the ratio of the current ripple frequency in the engine core circuit, caused by the torque ripple moment on the bit when rolling the cones from tooth to tooth and separated from the current ripple spectrum in the engine core circuit, to the pulse frequency of the EMF (tooth), is determined. on the engine bark, the engine angular velocity of the engine, and consequently the bit angular velocity, and emissions from the EMF pulsation spectrum on the engine bark. Then, similar ratios are calculated for the current drilling conditions. The equality of the current value of the ratio and the value determined for the deliberately subcritical angle of the bit indicates the operation of the electric drill in the zone with subcritical angular velocities of the bit. A decrease in the current value of the ratio in comparison with the value of the ratio determined for a deliberately subcritical speed indicates the operation of a direct current electric drill in a zone with supercritical angular bit rates. Using the proposed method allows to increase the efficiency of the drilling process due to the rational drilling of bits. 4 The invention method for determining the mode of operation of an electric drill while drilling with roller bits, includes the recording of downhole parameters, characterized in that, in order to improve the accuracy of determining the working area of the electric drill, the ratios of the frequency of the pulsations of the bit from the rolling of the cones to taper to angular velocity at its subcritical value, this ratio is compared with the clock one in the drilling process, while judging by the equality of these relations, the electric drill is judged to work in the pre-junction zone, and a decrease in the current value of the ratio in the supercritical zone. Sources of information taken into account during the examination 1. M. Eskin. Longitudinal oscillations of the bottom-hole string and their influence on the characteristics of 3a6oibibix engines — Petrochemical industry, No. 1, 1966, p. 16-19 (prototype).