CN2641271Y - Annlus logging, low flow pressure oil pumping well liquid flow control type well flushing device - Google Patents

Abstract

The utility model relates to a controlled flushing implement which is capable of annulus logging the fluid flow of the oil extractor with the flow pressure, control type instrument of the underground oil extraction, in particular to a flushing implement. An upper joint(1) is fixed at the superior end of a center righting rod(2), an impeller lead screw(3) and a check valve plug(5) are embedded outside the superior end of the center righting rod(2); a pushing sleeve(4) is embedded outside the check valve plug(5) which is arranged below the impeller lead screw(3). A centre tube(7) and the casing of a rubber pot(6) are respectively arranged in and outside of the inferior end of the pushing sleeve(4), and an upper pot seat is fixed on the superior end of a rubber pot(9) which is fixed outside the centre tube; an inferior joint(10) is fixed outside the inferior end of the centre tube(7). The utility model is applicable for the low current pressure well, capable of effectively preventing the flushing water from infusing into the stratum, reducing the drain of the flushing hot water and the energy dissipation, and protecting the stratum, in particular to that after flushing, the well is capable of immediately resuming the regular production, improving the output of the crude oil, and no effecting the normative testing work of the pumping unit with an oversize hole.

Description

But the liquid flow controlled well-washing device of annulus logging low flow pressure rod-pumped well

Technical field: the utility model belongs to the control class instrument under the producing well, is specifically related to well-washing device.

Background technology: in the oilfield exploitation stage a lot of low flow pressure wells are arranged, this well well-flushing water when well-flushing easily pours into the stratum, and its consequence is that well-flushing hot water is run off in a large number, causes energy waste, and has injured the stratum.Especially the oil well behind the well-flushing needs the time about a week just can return to the preceding production status of well-flushing, has influenced crude output.In addition, the rod-pumped well with decentralized wellhead can not be tested with common well-washing device.

The utility model content: the purpose of this utility model is that well-flushing water pours in down a chimney oil reservoir when solving low flow pressure rod-pumped well well-flushing, influence the problem that oil well production and decentralized wellhead rod-pumped well can not be tested, but and design the liquid flow controlled well-washing device of a kind of annulus logging low flow pressure rod-pumped well.The utility model comprises top connection 1, center righting rod 2, central tube 7, lower contact 10, it also comprises impeller screw mandrel 3, pushing sleeve 4, single current valve plug 5, rubber tube shell 6, last glue tube base 8, rubber tube 9, the lower end of top connection 1 is fixed on the outside, upper end of center righting rod 2, impeller screw mandrel 3 is set in the outside of the center righting rod 2 of top connection 1 lower end, pushing sleeve 4 is set in the lower end of impeller screw mandrel 3, single current valve plug 5 is set in the cavity 11 between impeller screw mandrel 3 lower ends and the pushing sleeve 4, central tube 7 is fixed on the outside of the inboard of pushing sleeve 4 lower ends and center righting rod 2, rubber tube shell 6 is fixed on the outside of pushing sleeve 4 lower ends, last glue tube base 8 is fixed between central tube 7 and rubber tube shell 6 lower ends, pushing sleeve 4 and central tube 7, rubber tube shell 6, seal into hydraulic fluid chamber 12 between the last glue tube base 8, being full of in the hydraulic fluid chamber 12 has hydraulic oil 13, have horizontal boss 17 in the inboard, middle part of center-pole 7, boss 17 joins with center righting rod 2.Rubber tube 9 is set between the inboard of the outside of central tube 7 of glue tube base 8 lower ends and rubber tube shell 6, the upper end of lower contact 10 is fixed on the outside of rubber tube 9 lower ends and the outside of central tube 7 lower ends, and the lower end of lower contact 10 holds up the lower end of bar 2 to be connected mutually with center-pole.This well-washing device is installed in the bottom of rod-pumped well oil well pump, flushing fluid passes through from the impeller of impeller screw mandrel 3 during well-flushing, make impeller screw mandrel 3 produce rotation, because the impeller screw mandrel is motionless about in the of 3, pushing sleeve 4 spirals are descended, and then by outwards expansion of hydraulic oil compressing rubber tube 9 compressions, being about to oil jacket annular space packing up and down when rubber tube 9 and tubing and casing are adjacent to lives, because rubber tube 9 expands nowhere, so pushing sleeve 4 also just is forced to stop moving downward, but the single current valve plug 5 on the pushing sleeve 4 continues to move downward, finally make it to break away from impeller screw mandrel 3, single current valve plug 5 with the sealing of the cavity between central tube 7 and the center righting rod 2, makes flushing fluid can not enter the stratum on the boss 17 that is pressed under the effect of flushing fluid stream between central tube 7 and the center righting rod 2.Flushing fluid is returned by the screen casing on well-washing device top, realization is to the cleaning of oil well, after well-flushing finished, when the pressure of flushing fluid during less than the pressure of hydrocarbon stratum, hydrocarbon stratum promoted single current valve plug 5 and moves upward, the production passage of oil well is opened, impeller screw mandrel 3 is to opposite spin under the effect of crude oil liquid, and it is up to drive bearing holder (housing, cover) 4 spirals, and the pressure on the rubber tube 9 is cancelled, the rubber tube retraction, the oil jacket annular space is communicated with up and down.Single current valve plug 5 contacts with impeller screw mandrel 4 and by being threaded togather, can carry out ordinary production at once simultaneously.Because the well-washing device diameter only is φ 90mm, do not influence being lowered to of tester, so the test when not influencing ordinary production.The utility model is suitable for the low flow pressure well; it can prevent effectively that well-flushing water from pouring into the stratum; the loss of well-flushing hot water and the waste of the energy have been reduced; also protected the stratum; especially just can return to normal production behind the well-flushing at once; improved crude oil yield, but also do not influenced normal test operation with decentralized wellhead oil pumper.

Description of drawings: Fig. 1 is a utility model overall structure schematic diagram.

The specific embodiment one: present embodiment is by top connection 1, center righting rod 2, central tube 7, lower contact 10, impeller screw mandrel 3, pushing sleeve 4, single current valve plug 5, rubber tube shell 6, last glue tube base 8, rubber tube 9 is formed, the lower end of top connection 1 is fixed on the outside, upper end of center righting rod 2, impeller screw mandrel 3 is set in the outside of the center righting rod 2 of top connection 1 lower end, pushing sleeve 4 is set in the lower end of impeller screw mandrel 3, single current valve plug 5 is set in the cavity 11 between impeller screw mandrel 3 lower ends and the pushing sleeve 4, central tube 7 is fixed on the outside of the inboard of pushing sleeve 4 lower ends and center righting rod 2, rubber tube shell 6 is fixed on the outside of pushing sleeve 4 lower ends, last glue tube base 8 is fixed between central tube 7 and rubber tube shell 6 lower ends, pushing sleeve 4 and central tube 7, rubber tube shell 6, seal into hydraulic fluid chamber 12 between the last glue tube base 8, being full of in the hydraulic fluid chamber 12 has hydraulic oil 13, have horizontal boss 17 in the inboard, middle part of center-pole 7, boss 17 joins with center righting rod 2.Rubber tube 9 is set between the inboard of the outside of central tube 7 of glue tube base 8 lower ends and rubber tube shell 6, the upper end of lower contact 10 is fixed on the outside of rubber tube 9 lower ends and the outside of central tube 7 lower ends, and the lower end of lower contact 10 holds up the lower end of bar 2 to be connected mutually with center-pole.

The specific embodiment two: the difference of present embodiment and embodiment one is, studding with O RunddichtringO 14 outside the lower end of pushing sleeve 4 and between the upper end inwall of rubber tube shell 6 and central tube 7, between the lower end inwall of last glue tube base 8 and rubber tube shell 6, stud with O RunddichtringO 15, between the lower end of the lower end of rubber tube 9 and central tube 7, stud with O RunddichtringO 18.Other composition is identical with embodiment one with annexation.

Claims (2)

1, but the liquid flow controlled well-washing device of annulus logging low flow pressure rod-pumped well, it comprises top connection (1), center righting rod (2), central tube (7), lower contact (10), it is characterized in that it also comprises impeller screw mandrel (3), pushing sleeve (4), single current valve plug (5), rubber tube shell (6), last glue tube base (8), rubber tube (9), the lower end of top connection (1) is fixed on the outside, upper end of center righting rod (2), impeller screw mandrel (3) is set in the outside of the center righting rod (2) of top connection (1) lower end, pushing sleeve (4) is set in the lower end of impeller screw mandrel (3), single current valve plug (5) is set in the cavity (11) between impeller screw mandrel (3) lower end and the pushing sleeve (4), central tube (7) is fixed on the outside of the inboard of pushing sleeve (4) lower end and center righting rod (2), rubber tube shell (6) is fixed on the outside of pushing sleeve (4) lower end, last glue tube base (8) is fixed between central tube (7) and rubber tube shell (6) lower end, pushing sleeve (4) and central tube (7), rubber tube shell (6), seal into hydraulic fluid chamber (12) between the last glue tube base (8), be full of in the hydraulic fluid chamber (12) and hydraulic oil arranged (13), have horizontal boss (17) in the inboard, middle part of center-pole (7), boss (17) joins with center righting rod (2), rubber tube (9) is set between the inboard of the outside of central tube (7) of glue tube base (8) lower end and rubber tube shell (6), the upper end of lower contact (10) is fixed on the outside of rubber tube (9) lower end and the outside of central tube (7) lower end, and the lower end of lower contact (10) holds up the lower end of bar (2) to be connected mutually with center-pole.

But 2, the liquid flow controlled well-washing device of annulus logging low flow pressure rod-pumped well according to claim 1, it is characterized in that studding with O RunddichtringO (14) outside the lower end of pushing sleeve (4) and between the upper end inwall of rubber tube shell (6) and central tube (7), between the lower end inwall of last glue tube base (8) and rubber tube shell (6), stud with O RunddichtringO (15), between the lower end of the lower end of rubber tube (9) and central tube (7), stud with O RunddichtringO (18).

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