CN2563301Y

CN2563301Y - Well flushing device for oil well conventional well-flushing

Info

Publication number: CN2563301Y
Application number: CN 02274715
Authority: CN
Inventors: 张冬吉; 张景辉; 刘金国; 黄晖
Original assignee: 孙学花
Priority date: 2002-08-11
Filing date: 2002-08-11
Publication date: 2003-07-30
Anticipated expiration: 2012-08-11

Abstract

The utility model relates to a well flushing device for oil well conventional well-flushing, belonging to underground fittings of petroleum machinery, wherein, an upper joint 1 is in threaded connection with a connecting sleeve 4; a lower joint 8 is in threaded connection with the other end of the connecting sleeve 4; a well flushing piston 3 is positioned inside the connecting sleeve and between the upper joint 1 and the lower joint 8; a spring 6 is sleeved outside the lower part of the well flushing piston 3; one to two flushing ports 5 are arranged on the connecting sleeve 4. The utility model has the advantages that: the utility model is novel in structure, convenient to use and good in well flushing effect, is mainly used in oil wells, can flush forward and eliminate the eyelet stemming of a sand prevention pipe of a deep-well pump as well as the dirt at the bottom of a well, can flush forward the wells with low sand face, and is very effective in protecting the sand prevention devices of the deep-well pump as well as the deep-well pump.

Description

Oil well is just being washed well-washing device

Technical field the utility model belongs to petroleum machinery down-hole accessory.

Background technology is present, and oil field flushing can only be taked backwash, and its shortcoming is: if deep well pump sand control pore eye is blocked, just can not carry out backwash; Promptly enable to wash when backwash logical, the foul that washes out is deposited in the deep well working barrel easily, causes holddown, influences ordinary production.

Summary of the invention the utility model provides a kind of oil well just washing well-washing device, the problem that produces when solving present backwash.The technical scheme that the utility model is taked is: top connection 1 is threaded with adapter sleeve 4, lower contact 8 is threaded with the other end of adapter sleeve 4, well-flushing piston 3 is in adapter sleeve inside and between top connection 1 and lower contact 8, the outside, bottom at this well-flushing piston 3 is with spring 6, and 1 to 2 hydrophthalmia 5 is arranged on adapter sleeve 4; On the top of well-flushing piston 3 and the both sides that are positioned at hydrophthalmia 5 one group of sealing ring 2 is respectively arranged, in lower contact 8 and with well-flushing piston 3 junctions, one group of sealing ring 7 is arranged.During use, will connect oil pipe on the utility model, down connect deep well pump, fixture block 9 is displaced downwardly to well-flushing piston place, and the well-flushing piston is displaced downwardly to below the hydrophthalmia, and water can be entered in the screen casing along well-flushing conduit 10 through hydrophthalmia, outside well-flushing in the screen casing; After washing well, on carry fixture block, the well-flushing piston is blocked hydrophthalmia gets final product.

Advantage of the present utility model is: novel structure; easy to use; well washing effect is good; be mainly used in the oil well; the energy square impact is also removed the obstruction of deep well pump sand control pore eye and the foul in shaft bottom; can also carry out square impact to the low well of sand face, all very effective to the sand control installation and the deep well pump of protection deep well pump.

Description of drawings

Fig. 1, the utility model structural representation;

Scheme of installation when Fig. 2, the utility model work.

The specific embodiment

Embodiment one:

Top connection 1 is threaded with adapter sleeve 4, lower contact 8 is threaded with the other end of adapter sleeve 4, well-flushing piston 3 is with spring 6 in adapter sleeve inside and between top connection 1 and lower contact 8 in the outside, bottom of this well-flushing piston 3, and 1 to 2 hydrophthalmia 5 is arranged on adapter sleeve 4.

Embodiment two:

Top connection 1 is threaded with adapter sleeve 4, lower contact 8 is threaded with the other end of adapter sleeve 4, well-flushing piston 3 is in adapter sleeve inside and between top connection 1 and lower contact 8, the outside, bottom at this well-flushing piston 3 is with spring 6,1 to 2 hydrophthalmia 5 is arranged on adapter sleeve 4, on the top of well-flushing piston 3 and the both sides that are positioned at hydrophthalmia 5 one group of sealing ring 2 is respectively arranged, in lower contact 8 and with well-flushing piston 3 junctions, one group of sealing ring 7 is arranged.

Claims

1, a kind of oil well is just being washed well-washing device, it is characterized in that: top connection (1) is threaded with adapter sleeve (4), lower contact (8) is threaded with the other end of adapter sleeve (4), it is inner and between top connection (1) and lower contact (8) that well-flushing piston (3) is positioned at adapter sleeve, the outside, bottom at this well-flushing piston (3) is with spring (6), and 1 to 2 hydrophthalmia (5) is arranged on adapter sleeve (4).

2, oil well according to claim 1 is just being washed well-washing device, it is characterized in that: on the top of well-flushing piston (3) and the both sides that are positioned at hydrophthalmia (5) one group of sealing ring (2) is respectively arranged, go up and one group of sealing ring (7) arranged in lower contact (8) with well-flushing piston (3) junction.