SU825874A1

SU825874A1 - Hydraulic dynamometer

Info

Publication number: SU825874A1
Application number: SU792815272A
Authority: SU
Inventors: Василий Иванович Сердюк; Лев Николаевич Пуртов
Original assignee: Volg G N I Pi Neftyanoj Promy
Priority date: 1979-08-28
Filing date: 1979-08-28
Publication date: 1981-04-30

Description

II

Изобретение относитс к добыче нефти, а именно к средствам исследовани работы штанговых глубиннонасосных установок.The invention relates to the extraction of oil, namely to the means of investigating the operation of sucker-rod deep-well pumping installations.

Известен динамограф дл регистрации усилий в колонне штанг, содержащий корпус и поршни, образующие измерительную и .рабочие полости и регистрирующий узел Q .A known dynamograph for recording forces in a column of rods, comprising a housing and pistons, forming a measuring and working cavity and a registering node Q.

Известен гидравлический динамометр , содержащий корпус с поршнем, измерительную полость, в которой установлен датчик давлени , и регистрирующий узел 2.A hydraulic dynamometer is known, comprising a housing with a piston, a measuring cavity in which a pressure sensor is installed, and a recording unit 2.

Однако известный, гидравлический динамометр позвол ет регистрировать только раст гивак цие усили в верхней наземной) части колонны штанг.However, the well-known hydraulic dynamometer can only register tensile forces in the upper ground part of the rod string.

Цепью изобретени вл етс обеспечение возможности измерени знакопеременных нагрузок, действующих на колонну насосных штанг,The chain of the invention is to enable measurement of alternating loads acting on a string of pump rods,

Цоставленна цель достигаетс , тем, что гидравлический динамометр снабжен золотником, а поршень выполнен полым с двум продольными каналами, один из которых сообщает измерительную полость с полостью над поршнем, а другой - с полостьюThe goal is achieved by the fact that the hydraulic dynamometer is equipped with a spool and the piston is made hollow with two longitudinal channels, one of which communicates the measuring cavity with the cavity above the piston, and the other with the cavity

.под поршнем, причем золотник установлен в полости поршн с возможностью поочередного перекрыти продольных каналов.. under the piston, the valve being installed in the piston cavity with the possibility of alternately blocking the longitudinal channels.

На чертеже схематически изображенThe drawing shows schematically

предлагаемый динамометр.the proposed dynamometer.

Claims

The hydraulic dynamometer consists of a housing (chamber) of a 1-nd compacting cylinder 2 and a hollow piston 3, in the central cavity and of which, bounded above by the movable sleeve 4, a spool 5 is installed. The piston 3 is connected to the upper end by means of sub 6 and coupling 7 the upper rods 8, and the case I using the sub 9 - with the lower rods (not shown). A pressure sensor 10 is screwed into the upper end of the sub 6, which is connected via cable 1 1 to. measuring device on the surface. The cavity (pressure sensor 10 through channel ё in the movable sleeve 4 and. Channel i in piston 3 is connected to the over piston cavity, and through channel E, central cavity OS and channel e in the piston with the third piston cavity. All cavities and channels are filled with liquid oil). The dynamometer works as follows. in a way. When moving the pumping column downwards, the rods below the dinometer are subjected to compressive loads: the Archimedean force, the force of friction of the rods about the liquid and the pipe, the force that resists the movement of the pluser in the cylinder), due to which the pressure in the piston cavity rises and in the over piston - decreases. Under the action of the differential pressure, the gold 5 moves upwards and overlaps. in the movable sleeve 4 and the can i in the piston 3. In this case, the pressure in the piston cavity through channel b, the central cavity a and the channel in the piston 3 is transmitted into the cavity f) by pressure sensor 10, pressure sensor 10 and cable 11 Measuring registering 1st device on the surface. When the pump rods move upwards, they are subjected to a stretching load, as a result of which the pressure in the piston cavity, the canape c), the central strips a and channel e in the piston 3 and in the strips AND under the pressure sensor 10 decreases the spool 5 in the catfish it moves down and overlaps the channels and 6. At this time, the pressure of the fluid rises into the overhead 4-4 of the involuntary cavity through the channel t in the piston 3 and: the channel .. in the movable sleeve 4 is transmitted into the cavity under the pressure sensor 10, to the pressure sensor 10 and through the cable 11 to the measuring device day surface. During the subsequent movement of the rod string down and then up, the cycle repeats. The proposed dynamometer makes it possible to measure alternating loads acting on a column of pump rods in any section. The invention of the hydraulic dynamometer, comprising a housing with a piston, a measuring cavity in which a pressure sensor is installed, and a registering unit, which is equipped with a spool to make it possible to measure alternating loads acting on a string of pump rods, and the piston is made hollow with two longitudinal channels, one of which communicates the measuring cavity with the cavity above the piston, and the other with the cavity under the piston, and the spool is installed in the cavity of the piston alternate overlap of the longitudinal channels. Sources of information taken into account in the examination 1. USSR author's certificate. № 499397. cl. B 21 B 19/08, 1974.

2. Ants V.M. Operation of oil and gas wells. M., Nedra, 1973, p. 242-246.

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