Abstract

Theme of master's work:

“Development of the construction of borehole pumping unit”

Leader of work: head of department, docent, Karakozov Artur Arkadyevich

Actuality of my master's work

National economic development and improvement of the people's wellbeing require increasing of industrial, agricultural and domestic water supply one of the main sources of which is underground water. In the majority of countries in the world only small part of resources of underground water is exploited now. Nowadays in connection with the reduction of resources of surface water the disposal of underground water for different purposes is greatly increasing.

The creation of high-lift and highly productive equipment for petroleum production is of great importance for national economy. Mineral resource industry needs such equipment for unwatering of mines very much. The volume of well-drilling for mineral water extraction is increasing. To dry up such well (the depth of which sometimes reaches 1000 m and more) it is necessary to use high lift pumps.

Equipping of unwatering boreholes bored for the purpose to dry up mineral deposits and wetlands with down-pumps is of no small importance.

Nowadays in our country and abroad many various technical means are used for artificial lifting of liquids developed for different operating conditions that are distinguished constructively and according to principles of operation.

One of the most promising liquid lifters which satisfy different operational conditions is down displacement pumps with hydraulic drive.

Description of a construction

A downhole pumping unit consists of a body 1 with upper and lower adapting pipes 2 and 3. In the body 1 there is a hydraulic engine which consists of a piston 4 mounted in a cylinder 5 with forming of cavities above and below piston 6 and 7. Release valve 8 of hydraulic engine is mounted in the centralizer 9 with holes 10 which is placed in the top of the cylinder 5 above the piston. The liner 11 of a release valve 8 is placed in the cavity of the piston 4. In the upper adapting pipe 2 there is a room in which the unloading piston 12 having been mounted is fixedly connected with the inlet valve 13 of the hydraulic engine. The cavity 14 above the unloading piston 12 is connected with the outlet port 15, and the cavity 16 above it is connected with outlet port 17 by means of channel 18. In cavity 14 there have been made shoulders 19 and spring 20 has been mounted. Cavity above the piston 6 of cylinder5 of the hydraulic engine is connected with outlet port 15 by channel 21 in inlet valve 13 and unloading piston 12. Piston cavity 7 of cylinder 5 of the hydraulic engine is connected with outlet port 17 by channels 18 and 22, groove 23 on unloading piston 12, channels 24 and 25, free distances between body 1 and cylinder 5, hole 26. Channel 25 made in the line between the cavity of the cylinder below piston 5 of the hydraulic engine and outlet port 15 is blocked with valve 27 which has empty step liner28 mounted in valve 21. Above valve 27 there is spring 29.

Below hydraulic engine in body 1 there is a pump which consists of cylinder 30 partitioned by piston 31 into cavity above piston 32 and cavity below piston 33. Piston 31 is connected with piston 4 of the hydraulic engine by rod 34 which passes through packing partition 35. Standing and traveling valves 36 and 37 of the pump are installed in channels 38 and 39 correspondently that are made in lower adapting pipe 3 and are connected with cavity under piston 33 of cylinder 30 of the pump. In lower adapting pipe 3 there were made channels 40 and 41 in which there are additional standing and traveling valves 42 and 43 of the pump. Channels 40 and 41 are connected with cavity above the piston of cylinder 30 of the pump with free distance between body 1 and cylinder 30 and hole 44.

While operating, the pump can be placed in water-raising pipes 45 which are in boreholes (not shown). To supply the pump with operating fluid force pipes 46 are applied.

The science newness of the research work

The given invention was based on the task of improving of borehole pumping unit in which due to providing of periodic connection of the cavity below the piston of a hydraulic engine’s cylinder with the outlet port and due to forcing of fluid out of the cavity above the piston of pump’s cylinder a great height of lifting and fluid supply are reached.