CN2330781Y - Helical lobe pump downhole driving device - Google Patents

Abstract

The utility model relates to a screw pump driving device used in a well. An oil submersible motor is adopted to be connected in series with a pressure reduction protector in a well, a planet transmission type speed reducer, a screw pump and a wire connecting terminal of a power cable. The screw pump driving device used in a well has the advantages that the long distance transmission of ground driving force is thoroughly thrown away; the low power consumption, the high efficiency, the strong adaptability, etc. of the screw pump are fully embodied; machinery accidents are reduced, a work pump inspection period is extended, power consumption is lowered, and electric power consumption due to a long distance transmission process is avoided, and further, the power of a driving motor is relatively reduced; the application range of the screw pump is extended. The screw pump driving device used in a well is suitable for shallow wells and medium deep wells. The utility model can also be used in deep pumping wells.

Description

Drive unit under the screw bolt well

The utility model belongs to the equipment that recovers the oil from deep-well, particularly a kind of device that screw pump and driving force lifting oil is set in the down-hole.

At present, the screw pump oil production system type of drive that the production of oil field oil recovery is both at home and abroad adopted is ground and drives, and promptly driving force is delivered to down-hole progressive cavity pump by a sucker rod that links up successively with driving force on ground, and oil is given rise to ground.This power delivery mode energy consumption is big; the cost height; and, sucker rod causes wearing and tearing in the tubing string because of being contained in; sucker rod and oil pipe are reduced application life; pump detection period shortens; because roofbolt is longer, and torsional deflection and screen resilience are very big during transferring power, when shutting down, very easily cause mechanical accidents such as pumping rod disengaging simultaneously.Cause the screw pump work system life-span to be had a greatly reduced quality in actual production, well is dark more, and this type of problem is serious more, thereby has influenced promoting the use of of screw pump oil production technology.So far fail taking out the well use deeply.Existing oil-immersed pump is because the submersible electric machine with oil rotating speed is very high, can only the adapted centrifugal pump, constitute electric submersible centrifugal pump, and because centrifugal pump lift is low, also fail to use taking out well deeply.

The purpose of this utility model is, overcomes the deficiency that present screw pump power-transmission system exists, and designs and produces drive unit under a kind of screw bolt well, makes advantages such as oil production technology technique to high-efficiency rate, low energy consumption, strong adaptability obtain performance; And the use field of improving the screw pump oil production technology, be applicable to shallow well, middle-deep well and taken out all kinds of pumpingh wells such as well deeply.

The technical solution of the utility model is following realization; drive unit under a kind of screw bolt well; comprise motor, reducer, screw pump, oil connection, adopt existing submersible electric machine with oil to make driving force, be arranged on the down-hole; its order of connection of going into the well is; down-hole pressure reducing protection device, submersible electric machine with oil, reducer, oil-in, screw pump, oil connection; power cable is caused the down-hole, be connected with the submersible electric machine with oil wiring terminal.

Wherein, reducer is the epicyclic transmission type reducer, its structure is, be provided with planet pinion and thrust bearing between the output shaft that is used to connect the power shaft of submersible electric machine with oil and be used for the connecting screw rod pump, power shaft and output shaft are provided with axle sleeve and bearing supporting, the end is provided with oil sealing, is connected with ring gear between power shaft end cap and the output shaft end cap, adjusts rotating speed by mechanical drive mode.

Operating principle of the present utility model is, electrical source of power is transported to submersible electric machine with oil by well head controller through downhole cable, motor speed makes speed drop to the working range that is fit to screw pump through the epicyclic transmission type reducer, the helical rotor of drive screw pump, rely on the work that is meshing with each other of helical rotor and helical stator, realization oil recovery purpose.

The utility model has the advantages that: thoroughly cast aside the long Distance Transmission of ground screw pump power, avoided the shortcoming of the ground screw pump kind of drive; Drive unit has kept whole advantages of screw pump oil production technology under the screw bolt well, and is brought into play better, and mechanical accident reduces, and the operation pump detection period prolongs, and makes that low-power consumption, high efficiency, the compliance of screw pump is strong etc. to be demonstrated fully; Reduced power consumption, avoided the power consumption that causes because of long Distance Transmission process friction elastic deformation etc., and then drive motors power is reduced relatively; Increased the scope of application of screw pump greatly.Drive unit is applicable to shallow well, middle-deep well under the screw bolt well, also can take out the well use deeply.

Below in conjunction with drawings and Examples, the utility model will be further described:

Fig. 1 is the organigram of drive unit under the screw bolt well of the present utility model

Fig. 2 is the organigram of the epicyclic transmission type reducer of drive unit under the screw bolt well of the present utility model

As seen from Figure 1; drive unit under the screw bolt well of the present utility model; comprise submersible electric machine with oil, reducer, screw pump, oil connection; the order of going into the well is: down-hole pressure reducing protection device 1, submersible electric machine with oil 2, epicyclic transmission type reducer 4, oil-in 5, screw pump 6, oil connection 7, submersible electric machine with oil wiring terminal 3 is connected with power cable.Adopt flange to connect or the shaft coupling connection.

As seen from Figure 2, be provided with planet pinion 13 and thrust bearing 14 between the output shaft 12 that is used to connect the power shaft 11 of submersible electric machine with oil and be used for the connecting screw rod pump of epicyclic transmission type reducer, power shaft and output shaft are provided with axle sleeve 15 and bearing 16 supportings, the end is provided with oil sealing 17, is connected with ring gear 20 between power shaft end cap 18 and the output shaft end cap 19.

Claims (2)

1, drive unit under a kind of screw bolt well; comprise motor, reducer, screw pump, oil connection; it is characterized in that; adopt submersible electric machine with oil to be arranged on the down-hole, its order of connection of going into the well is down-hole pressure reducing protection device; submersible electric machine with oil, reducer, oil-in, screw pump; oil connection causes the down-hole with power cable, is connected with the submersible electric machine with oil wiring terminal.

2, drive unit under the screw bolt well as claimed in claim 1, it is characterized in that, reducer is the epicyclic transmission type reducer, its structure is, be provided with planet pinion and thrust bearing between power shaft and the output shaft, power shaft and output shaft are provided with axle sleeve and bearing supporting, are connected with ring gear between power shaft end cap and the output shaft end cap.

Images