SU889891A1

SU889891A1 - Well sucker rod pump

Info

Publication number: SU889891A1
Application number: SU802907866A
Authority: SU
Inventors: Шафагат Фахразович Тахаутдинов; Юрик Ахметкамалович Закиров; Владимир Андреевич Винокуров
Original assignee: Нефтегазодобывающее Управление "Джалильнефть" Им.50-Летия Ссср
Priority date: 1980-04-10
Filing date: 1980-04-10
Publication date: 1981-12-15

Description

(54) СКВАЖИННЫЙ ШТАНГОВЫЙ НАСОС(54) WELL BAR PUMP

II

Изобретение относитс к технике добычи нефти, в частности к скважинным штанговым насосам преимущественно вставного исполнени , и может быть использовано в нефтедобывающей промышленности при глубиннонасосной эксплуатащ1и скважин.The invention relates to a technique for oil production, in particular, to borehole sucker-rod pumps, mainly of a plug-in design, and can be used in the oil industry with deep-well operation wells.

Известен скважинный штанговый насос, содержащий корпус с насосно-компрессорными трубами, щишндр, полый плунжер с установленным в нем всасывающим клапаном, размещенный в цилиндре, подплунжерна полость которого посто нно сообщена с затрубнь1м пространством, шток, св зывающий плунжер с колонной насоснь1х штанг, уплотнительный узел И гидролинию дл сообщени надплунжерной полости щшиндра насоса с насоснокомпрессорными . трубами через установленный в ней нагнетательный клапан 1.A well pump is known, comprising a housing with tubing pipes, a shank, a hollow plunger with a suction valve installed therein, placed in a cylinder, the sub-plunger cavity of which is permanently in communication with the space, connecting the plunger with the pump shaft, the sealing unit And the hydroline for the communication of the above-plunger cavity of the shchindra pump to the pump-compressor. pipes through the discharge valve installed in it 1.

Недостатком известного скважинного щтангового насоса вл ютс большие амплитуды напр жений в насосных штангах из-за наличи больших знакопеременных нагрузок в начале хода плунжера вверх и в конце егоThe disadvantage of the well bore shtangovogo pump are large amplitudes of stresses in sucker rods due to the presence of large alternating loads at the beginning of the stroke of the plunger up and at the end of its

хода вниз, что вызывает частые обрывы штанг, снижа надежность работы насоса в целом.stroke down, which causes frequent rod breaks, reducing the reliability of the pump as a whole.

Цель изобретени состоит в повышении надежности скважинного щтангового насоса путем снижени динамических нагрузок на насосные штанги.The purpose of the invention is to increase the reliability of a well shtangovogo pump by reducing the dynamic loads on the pump rod.

Указанна цель достигаетс тем, что гидролнни вьшолнена в виде обводного канала в корпусе, а уплотнительный узел - в виде сальника, размещенного на штоке и неподвиж10 но установленного в корпусе.This goal is achieved by the fact that the hydraulics are performed as a bypass channel in the housing, and the sealing assembly is in the form of an omentum placed on the rod and fixedly mounted in the housing.

На чертеже схематично представлен скважинный штанговый насос, общий вид.The drawing schematically shows a downhole sucker rod pump, a general view.

Claims

The borehole sucker-rod pump consists of a body 1 with tubing tubes 15, a cylinder 3, a hollow plunger 4 with a suction valve 5 installed in it, placed in cylinder 3, which has a sub plunger cavity 6 which is permanently connected to the annular space (not shown), 20 7, connecting the plunger 4 to the Column sucker rods 8, the sealing unit 9 and the hydraulic line 10 for communicating the overhead space 11 of the cylinder 3 of the pump with the cavity 3 12 of the pump-compressor pipes 2 through the discharge valve installed in the hydraulic line 10 13. The hydrolines 10 are made in the form of a bypass channel 14 in the pump casing 1, and the sealing unit 9 in the form of a stuffing box 15 placed on the rod 7 and fixedly mounted in the casing 1. We have a lock support 16 on which the pump is fixed in the casing 1 The pump works as follows. When the plunger 4 moves upward, the suction valve 5 is closed and the fluid in the supra plunger cavity 11 begins to compress from an initial pressure equal to the pressure in the sub plunger cavity 6 (pressure at the pump intake) to a pressure equal to the pressure in cavity 12 (pressure of the liquid column in tubing ). In this case, the discharge valve 13 in the bypass channel 14 opens and fluid begins to flow from the cylinder 3 of the pump into the pump-compressor waste pipes 2 (discharge stroke). The gland 15 and the check valve 13 installed in the bypass channel 14 protect the plunger 4 from the liquid column in the tubing at the initial moment of the plunger 4 moving upwards, which ensures a gradual increase in the load on the pump rods as the gas-liquid mixture compresses in the pre-plunger cavity 11. This, in turn, frees the pump nganga from the additional inertial loads created by the A1 column and vibrations arising in the pump rods. As the plunger 4 moves downward, the discharge valve 13 and the gland 15 hold the liquid column in the tubing 2 from moving into the superhunger cavity 11. Fluid from the sub-plunger cavity 6 begins to flow into the plunger 4 released by the plunger 4 through the suction valve 5 (suction process) . When this happens, the unloading of the pump rods 8 from static deformations occurs, and the buoyant force due to the pressure differential and applied to the rod 7 is directed in the opposite direction. down from the high pressure area of the cavity 12 of the pump-compressor pipes 2 to the low pressure area of the above-plunger cavity 11, which contributes to the lengthening of the pumping tube discharge period, i.e. their smooth unloading. This, ultimately, ensures the release of the pump rods from the additional loads arising from vibrations at the end of the plunger stroke downwards that occur in conventional borehole rod pumps with 1 suction valve located at the bottom of the pump cylinder. The pump is lowered into the well in the following sequence. On tubing tubes 2, body 1 is lowered with bypass channel 14 and installed in hydraulic line 10 of the latter by reverse pressure valve 13, cylinder 3 and bearing 16 located above it, and then on pumping shanks 8 - hollow plunger 4 assembled with rod 7 and An oil seal 15 is placed on it. When the plunger 4 enters the cylinder 3 of the pump, the oil seal 15 is fixedly mounted in the housing 1 and tightly engages the connection with the castle support 16. The equipment is lifted in the reverse order. When lifting the rod string 8, the oil seal 15 comes out of the connection with the housing 1 and the castle support 16 together with the plunger 4. When lifting the column of pump tubes 2, the liquid is drained through the cylinder 3 of the pump, since there is no suction valve on it. The release of the column of pump rods from vibrations and additional loads increases the service life of the rods, reduces the accident rate of the deep and surface equipment. In addition, the described design of the pump also protects the pump itself from clogging on the discharge side, which increases its service life. Invention Formula A borehole sucker-rod pump comprising a housing with tubing pipes, a cylinder, a polish plunger with a suction valve installed therein, placed in a cylinder, the sub-plunger cavity of which is permanently connected to the annular space, a rod connecting the plunger to the sucker rods, sealing an assembly and a hydroline for communicating the pre-plunger cavity of the pump cylinder with tubing pipes through a discharge valve installed in it, characterized in that, in order to increase the reliability By reducing the dynamic loads on the pump rods, the hydrolines are made in the form of a bypass channel in the housing, and the sealing unit is in the form of a stuffing box placed on the shaft and fixed in the housing. Sources of information taken into account during the examination 1. Lyustritsky c. M., Usik V. A., Likhachev M. A. Instructions for the manufacture and use of twin-plunger pumps for pumping highly