CN2436683Y

CN2436683Y - Hydraulic rod pump petroleum production means

Info

Publication number: CN2436683Y
Application number: CN 00212778
Authority: CN
Inventors: 粱兴; 郭惠民; 高兰
Original assignee: Petroleum Production Technology Inst Liaohe Oil Field Co China Petroleum Cor
Current assignee: Petroleum Production Technology Inst Liaohe Oil Field Co China Petroleum Cor
Priority date: 2000-07-25
Filing date: 2000-07-25
Publication date: 2001-06-27
Anticipated expiration: 2010-07-25

Abstract

The utility model relates to a hydraulic rod pump oil production device which is composed of a liquid supply system, a hydraulic bolt and a subsurface pump. The utility model is divided into an A type and a B type to fit the requirements of different delivery lift and displacement. Due to the adoption of ground reverse control, the utility model simplifies the structure of the subsurface pump, extends the period of pump inspection, and lowers the requirement to power fluid. Because the subsurface pump uses large stroke and low frequency of stroke, the influence on system efficiency caused by compressibility of the power fluid can be reduced, and the fullness coefficient of the pump can be increased. The utility model has the advantages of simple ground equipment and low cost of the whole device, and can be used for various wells such as wells containing sand, gases, thick oil, inclined wells, deep wells, etc.

Description

Fluid power bar pump oil extracting device

The utility model relates to the downhole oil extraction device that uses on a kind of field produces, particularly a kind of fluid power bar pump oil extracting device.

At present, oil field hydraulic piston pump oil recovery technique is full-fledged, but is subjected to the restriction of following factor, and use less: 1, the hydraulic piston pump displacement is bigger, and oilfield exploitation enters the middle and later periods, and oilwell produced fluid amount descends, and hydraulic piston pump can't be made the most of the advantage; 2, hydraulic piston pump oil production system scale of investment is big; 3, underwell pump complexity is to power fluid quality requirement height; 4, hydraulic piston pump to shake out, complex hole condition bad adaptability such as gassiness, viscous crude.

The purpose of this utility model is to provide a kind of fluid power bar pump oil extracting device, its disposable little investment, pump are hung the fluid power bar pump single well oil-production system that scope is wide, be applicable to the exploitation of oil field middle and later periods, the little discharge capacity of small-power, can adapt to shake out, multiple complex hole condition such as gassiness, viscous crude, inclined shaft, deep-well.

Fluid power bar pump single well production device of the present utility model mainly is made up of liquid-supplying system, fluid power roofbolt, underwell pump three parts, and liquid-supplying system is connected with the fluid power roofbolt, and the fluid power roofbolt is taked the mode of dual-pipe parallel, links to each other with underwell pump by an inserted sleeve.Underwell pump is by well liquid runner (6), last expulsion valve (7), last suction valve (8), last suction port (9), piston set (10), pump barrel (11), intermediate draw bar sealing (12), following expulsion valve (13), low suction valve (14), following suction port (15), sand sediment pipe (16), seal ring (17), power fluid runner (18) is formed, on pump barrel (11) outer wall, well liquid runner (6) is housed, power fluid runner (18), inserted sleeve (5) is equipped with in pump barrel (11) upper end, power fluid runner (18), connect pump barrel (11) under the oil pipe (3), be followed successively by expulsion valve (7) in the pump barrel (11), last suction valve (8), last suction port (9), piston set (10), intermediate draw bar sealing (12), following expulsion valve (13), low suction valve (14), following suction port (15) connects sand sediment pipe (16) under the pump barrel (11), between oil pipe and joint (5), seal ring (17) is housed.

During work, the high voltage power liquid that the ground liquid-supplying system provides is carried through the fluid power roofbolt and is communicated to underwell pump, drives underwell pump work, drives well liquid and discharges from oil pipe.

The utility model makes the underwell pump designs simplification owing to adopting ground commutation control, and pump detection period prolongs, to the requirement reduction of power fluid.Underwell pump adopts big stroke, low jig frequency, reduces the influence of the compressibility of power fluid to system effectiveness, improves the filling index of pump.Ground installation is simple, and the package unit cost is low, can be used for containing multiple wells such as sand, gassiness, viscous crude, inclined shaft, deep-well.

Accompanying drawing 1 is a fluid power bar pump single well oil-production system schematic representation.

Accompanying drawing 2 is I type underwell pump structural representations.

Accompanying drawing 3 is II type underwell pump structural representations.

Below in conjunction with accompanying drawing the utility model is further described:

In the accompanying drawing 1, fluid power bar pump oil extracting device comprises liquid-supplying system 1, fluid power roofbolt 2, oil pipe 3, underwell pump 4 compositions, liquid-supplying system 1 is connected with underwell pump 4 by fluid power roofbolt 2, the high voltage power liquid that liquid-supplying system 1 provides, carry through fluid power roofbolt 2, drive underwell pump 4 work, drive well liquid and discharge from well head.

In the accompanying drawing 2, I type underwell pump and relevant portion by: well liquid runner 6, go up expulsion valve 7, go up suction valve 8, go up suction port 9, piston set 10, pump barrel 11, intermediate draw bar sealing 12, down expulsion valve 13, low suction valve 14, suction port 15, sand sediment pipe 16, seal ring 17, power fluid runner 18 are formed down.The working procedure of this pump is: during upstroke, the high voltage power liquid that is provided by ground installation enters pump barrel 11 epicoeles through runner 18, driven plunger group 10 is up, well liquid in the pump epicoele enters oil pipe 3 through last expulsion valve 7 and runner 6, the outer well liquid of pump is through suction port 15 and low suction valve 14 enter the pump cavity of resorption down, simultaneously the low-voltage-powered liquid in the pump cavity of resorption returns ground through runner 18 and fluid power roofbolt 4, get on ground return low-voltage-powered liquid flux signal as commutation signal.During down stroke, high voltage power liquid enters pump barrel 11 cavity of resorptions by runner 18, driven plunger group 10 is descending, well liquid in the pump cavity of resorption is through expulsion valve 13, sand sediment pipe 16 and runner 6 enter oil pipe 3 down, the outer well liquid of pump is through last suction port 7 and go up suction valve 8 and enter the pump epicoele, and the low-voltage-powered liquid in the pump epicoele returns ground through runner 18 simultaneously.

Be divided into two kinds of structures of I type and II type, accompanying drawing 3 is an II type structure, and to adapt to different hole conditions, I type pumping head is lower, and discharge capacity is bigger, is applicable to shallow well and middle-deep well; II type pumping head is higher, and discharge capacity is less, is applicable to abortion liquid measure deep-well.I type underwell pump by pump barrel, two pistons, connect two piston pulling, intermediate draw bar sealing, suction metering valve, sand setting tail pipe, external flow channel etc. constitute up and down; II type pump increases a power piston on the basis of I type pump, the power fluid driving pressure reduces by half under identical lift, and pump displacement reduces by half.

Piston power fluid one side pressure in the course of the work is higher than well liquid one side all the time, and the piston low-speed motion, and the well liquid that contains mechanization impurity does not enter the seal clearance between piston and the pump barrel, has avoided containing the influence of sand drain liquid to working piston.

Claims

1, a kind of fluid power bar pump oil extracting device, by liquid-supplying system, the fluid power roofbolt, underwell pump three parts are formed, liquid-supplying system is connected with the fluid power roofbolt, it is characterized in that: fluid power roofbolt (2) links to each other with underwell pump by an inserted sleeve (5), underwell pump is by well liquid runner (6), last expulsion valve (7), last suction valve (8), last suction port (9), piston set (10), pump barrel (11), intermediate draw bar sealing (12), following expulsion valve (13), low suction valve (14), following suction port (15), sand sediment pipe (16), seal ring (17), power fluid runner (18) is formed, go up outer wall at pump barrel (11) well liquid runner (6) is housed, power fluid runner (18), inserted sleeve (5) is arranged at oil pipe (3) bottom, power fluid runner (18), connect pump barrel (11) under the oil pipe (3), be followed successively by expulsion valve (7) in the pump barrel (11), last suction valve (8), last suction port (9), piston set (10), intermediate draw bar sealing (12), following expulsion valve (13), low suction valve (14), following suction port (15) connects sand sediment pipe (16) under the pump barrel (11), between oil pipe and joint (5), seal ring (17) is housed.

2, a kind of fluid power bar pump oil extracting device according to claim 1, it is characterized in that: the fluid power roofbolt is taked the mode of dual-pipe parallel, by being lowered in the oil pipe.