CN2923993Y

CN2923993Y - Steam-filling-well underground steam non-return device

Info

Publication number: CN2923993Y
Application number: CN 200620092575
Authority: CN
Inventors: 张永政; 赵志东; 韦彩和; 初振淼; 王天鹏
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2006-07-25
Filing date: 2006-07-25
Publication date: 2007-07-18
Anticipated expiration: 2016-07-25

Abstract

The utility model relates to a steam check device of gas injection well applied to viscous oil steam injection thermal exploration, which comprises a main body 4, a taper valve 1, a spring 2, and a spring seat 3. The taper valve 1 is arranged inside of the main body 4, the spring seat 3 is screwed and connected with the inner circular surface at the lower part of the main body. The spring 2 is sleeved outside of the taper valve 1, the upper and lower ends of the spring 2 are respectively restricted by the taper steps at the top end of the taper valve 1 and the top side of the spring seat 3. The device is simple in structure and stable in operation. The utilization of the check valve of the device not only ensures a normal process of gas injection of viscous oil well, also realizes the wellhead leakage maintenance or valve replacement without steam exhausting and pressure zeroing after stopping the injection. The utility model contributes to save the thermal energy of steam, and increases economic benefit and ensures person safety and avoids contaminations.

Description

Annotate vapour well down-hole steam check device

Technical field:

The utility model relates to a kind of downhole hardware that is used for thick oil filling steam heating power producing well.

Background technology:

Steam soak is one of main method of viscous crude heating exploitation, and heavy oil wells is when taking the steam soak mode to produce, and injection boiler is adopted on ground, utilizes ∮ 114mm instlated tubular and ∮ 88.9mm instlated tubular to send steam to oil reservoir, viscosity of crude is reduced exploit.Because problems such as blowing out in the steam injection process, steam injection parameter shakiness, steam injection pressure height, the well head repeated use of notes vapour and repair quality often cause annotating position gas leakage such as vapour well head slips, steel ring and gate valve body itself, need the on-call maintenance rectification.If untimely maintenance, influence notes vapour quality causes enormous economic loss on the one hand, exists great hidden danger on the other hand, may cause the major accident in safety, the environmental protection.At present, when annotating vapour well head gas leakage maintenance rectification, owing to lack desirable non-return control device, the steam that must will inject into well bleeds off, make pressure zero rear that falls replaceable, not emptying Operating Pressure violating the regulations will cause enormous economic loss like this, if then may cause large tracts of land environment pollution and human casualty accident.Particularly when annotating the gas leakage of vapour well head main shutter, gate can't be changed, the easier serious consequence that causes.

Summary of the invention:

Thereby the utility model purpose is to provide a kind of well head of can realizing not put pressure and can keep in repair or change the notes vapour well down-hole steam check device of annotating vapour well head minimizing economic loss and can eliminating safe hidden trouble.

The utility model purpose is to realize like this.This kind steam check device is made up of main body, cone valve, spring and spring base, be provided with cone valve in the main body, the bottom inner headed face is assembled with spring base to be threaded, the cone valve outside is set with spring, and the spring upper and lower end is respectively cone valve upper end bullet step and the spring base end face limits.During use, with this device upper and lower end respectively with annotate vapour well well head lower flange hanger and be connected with notes vapour instlated tubular upper end in the pit shaft.When notes vapour well is normally annotated vapour, the steam of being carried by the ground boiler injects into well by wellhead assembly, under the steam pressure effect, cone valve moves down, steam enters in it from cone valve and main body upper gap, then inject the down-hole oil reservoir along instlated tubular, and heating makes it the viscosity reduction to thick oil underground well, the mobile raising.After notes vapour finished to stop annotating stewing well, the viscous crude that viscosity reduces can be by the deep-well oil pump extraction.So periodically handle up repeatedly, can make heavy oil wells keep normally annotating vapour and recovering the oil and produce.When notes vapour well stops annotating, cone valve in this check device main body moves up under down-hole steam pressure and spring action, until its upper end taper surface contact with main body top fitting face and with steam on return passage plugging firmly, at this moment, can under the situation that does not need emptying, be keeped in repair or be changed valve to annotating vapour well wellhead assembly leakage.

The utility model is simple in structure, reliable operation, utilize the effect of this device ball-and-seat both can guarantee that heavy oil wells normally annotated vapour, maintenance well head seepage or replacing valve under the situation that can when stopping annotating, need not again steam evacuation pressure is made zero, help saving steam thermal energy, increase economic efficiency, and can guarantee personal safety, prevent the generation of contamination accident.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in the figure, the utility model is made up of main body 4, cone valve 1, spring 2 and spring base 3, its structure, assembled relation are as follows: be provided with cone valve 1 in the main body 4, the bottom inner headed face is assembled with spring base 3 to be threaded, cone valve 1 outside is set with spring 2, and spring 2 upper and lower ends are respectively cone valve 1 upper end bullet step and spring base 3 end faces limit.Wherein, main body 4 is the pipe body of a long 1.2m, external diameter 114mm, its upper and lower end periphery is respectively equipped with to be connected with instlated tubular with the well head upper flange uses external screw thread, the top inner headed face is provided with a step, the conical surface that matches with cone valve 1 upper taper body is processed in the step inboard, and the bottom inner headed face is provided with to be connected with spring base 3 uses internal thread.Cone valve 1 is that a upper end is the pipe body of solid-cone body, and its upper taper body vertex of a cone is that the plane is beneficial to steam in jection and promotes it and move down, and the bullet periphery is provided with the step that is used for restraining spring 2.

Claims

1, a kind of notes vapour well down-hole steam check device, form by main body (4), cone valve (1), spring (2) and spring base (3), it is characterized in that: be provided with cone valve (1) in the main body (4), the bottom inner headed face is assembled with spring base (3) to be threaded, cone valve (1) outside is set with spring (2), and spring (2) upper and lower end is respectively cone valve (1) upper end bullet step and spring base (3) end face limits.

2, notes vapour well according to claim 1 down-hole steam check device, it is characterized in that: cone valve (1) is that a upper end is the pipe body of solid-cone body, and its upper taper body vertex of a cone is the plane, and the bullet periphery is provided with the step that is used for restraining spring (2).