CN2383971Y

CN2383971Y - Anti-stealing gas one-way valve for oil well head

Info

Publication number: CN2383971Y
Application number: CN 99221900
Authority: CN
Inventors: 康智
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-06
Filing date: 1999-08-06
Publication date: 2000-06-21
Anticipated expiration: 2009-08-06

Abstract

The utility model relates to an anti-stealing gas one-way valve for a Christmas tree, which belongs to a one-way valve in valve devices of an oil well. The valve is composed of a valve outer casing, a theft protection overcurrent baffle plate, a valve core assembly, an inner end cover and a sealing ring. The valve core assembly is composed of a valve core hole plate, a valve ball, a spring, a spring base and a valve core casing and is arranged on the middle part of an inner cavity of the valve outer casing. The theft protection overcurrent baffle plate is arranged on the outer end part of the valve core assembly, the inner end cover is arranged on the inner end part of the valve outer casing and the inner end cover presses the valve core assembly. After the one-way valve is used for substituting a casing pipe gate valve of a wellhead, the utility model can both prevent gas theft and carry out the operation of well washing and well killing. The valve has the advantages of simple structure and low cost.

Description

Production wellhead anti-theft gaseous one way valve

The utility model relates to the oil well valving, is a kind of production wellhead anti-theft gaseous one way valve.

The oil well mouth all will be installed a cover extracting device of oil, is commonly called as production tree.For wash, kill job, every cover wellhead for production all will be installed two sleeve pipe gate valves.This gate valve anyone free-hand can switch.The sleeve pipe ring cavity internal memory of many oil wells is at the petroleum gas of certain pressure.Some are near the oil well in rural areas, and peasants' common plastics pipeline is received on the sleeve pipe gate valve, and illegal natural gas in the sleeve pipe is received in the family used, and not only national energy suffers a loss, and frequent accidents such as initiation fire, blast, poisoning.Also, therefore often unloaded steathily and steal, make that the natural gas in the sleeve pipe is discharged in the atmosphere with having no control, both caused waste, polluted environment again by the lawless person because every on sleeve pipe gate valve is worth about 500 yuan, and the safety in production in the well site that is unfavorable for recovering the oil very much.For this reason, often take the method for soldering sleeve, the outlet of sealing big four sleeve pipe, though prevented that sleeve pipe gas is stolen or leak, damaged the cover interface tube (big four is worth 3500 yuan) of big four, and again can't carry out the washing of oil well, kill job.This problem has badly influenced ordinary production, environmental protection and the safety in oil field.

In order fundamentally to address this problem, developed this production wellhead anti-theft gaseous one way valve hereby.Replace original sleeve pipe gate valve with this one way valve, the lawless person just can't take over line without authorization and steal gas, and also no longer the robber unloads this valve, and utilizes that this valve can be washed equally, kill job.

The utility model is realized by following technical proposals:

This valve is made up of valve shell body, antitheft overcurrent baffle plate, Spool assembly, internal end cover and sealing ring.It is characterized in that Spool assembly is made up of spool orifice plate, valve ball, spring, spring base and spool housing.Valve ball and spring all are contained in the spring base, and spring base and spool orifice plate all are contained in the spool housing.Spool assembly is contained in the valve shell intracoelomic cavity.Antitheft overcurrent baffle plate is contained in the outer end of the spool housing of Spool assembly outer end.Internal end cover is contained in valve shell body inner end Spool assembly is pushed down.Sealing ring has 4, is contained in Gewindefreistiche place, spool orifice plate cylindrical place and the internal end cover cylindrical place of relevant parts respectively.

Antitheft overcurrent baffle plate in the above-mentioned production wellhead anti-theft gaseous one way valve is a disc, uniform 6～8 axial openings of crossing along the edge.It both can bottle up the retaining lawless person and back down one way valve from here and steal gas, can be again wash, kill job provides necessary fluid course.

The profile of the spring base in the above-mentioned production wellhead anti-theft gaseous one way valve is cylindrical, and there is individual warp-wise annular outer platform the bottom.There is cavity inside, and cavity first half internal diameter is greater than the Lower Half internal diameter, and lower port has radial ringed inner convex platform.3 vertical sipes of the uniform processing in position, circumference middle and upper part form 3 vertical narrow frames.

According to the production wellhead anti-theft gaseous one way valve that technique scheme and architectural feature are processed into, replace original sleeve pipe gate valve to be installed on the wellhead assembly.Because of it does not adopt the hand switch mode, can close automatically at ordinary times, the natural gas in the sleeve pipe can not leak, and the lawless person also can't steal gas without authorization.Go this valve can not be used for other occasion even if steal, because can not be general, profitless, just can stolenly again not unload yet.When needs are washed, during kill job, can utilize this one way valve fully, with wash, the kill-job corollary equipment is connected, the valve ball that band baric flow physical efficiency is backed down wherein enters the sleeve pipe ring cavity.This one-way valve structures is simpler, and cost is less than former half with gate valve, and its clamp special and steel ring also reduce half than original clip assembly price.So after using this valve, whenever save about 500 yuan of direct costs only, its indirect economic effect and social benefit are more considerable.

Accompanying drawing 1 is an overall structure complete section schematic side view of the present utility model, also is the B-B revolved sectional view of Fig. 2.

Accompanying drawing 2 is A-A sectional schematic diagrams of Fig. 1.

In conjunction with the accompanying drawings embodiment of the present utility model is described below:

In the accompanying drawing, the 1st, valve shell body, the 2nd, antitheft overcurrent baffle plate, the 3,4,9, the 12nd, rubber seal, the 5th, spool orifice plate, the 6th, valve ball, the 7th, spool housing, the 8th, spring base, the 10th, spring, the 11st, internal end cover.C was an opening, had 6～8.

The assemble sequence of above component is: earlier with spring 10 loading spring seats 8, valve ball 6 is placed the outer end of spring 10 again.Sealing ring 4 is installed in the peripheral groove of spool orifice plate 5, and push down valve ball 6 outer ends with spool orifice plate 5, put into spool inner casing 7 together with four then, this has just constituted Spool assembly.Sealing ring 3,9 is installed to respectively in the front portion of spool inner casing 7, the back middle part Gewindefreistiche, more antitheft overcurrent baffle plate 2 is installed to the front end of spool inner casing 7, then integral body is put into the inner chamber of valve shell body 1, and tightened anterior matching thread.Sealing ring 12 is installed in the annular groove of internal end cover 11 cylindricals, at last internal end cover 11 is put into valve shell body 1, and tighten matching thread.

Claims

1. production wellhead anti-theft gaseous one way valve, by the valve shell body, antitheft overcurrent baffle plate, Spool assembly, internal end cover and sealing ring are formed, it is characterized in that Spool assembly is by the spool orifice plate, valve ball, spring, spring base and spool housing are formed, valve ball and spring all are contained in the spring base, spring base and spool orifice plate all are contained in the spool housing, Spool assembly is contained in the valve shell intracoelomic cavity, antitheft overcurrent baffle plate is contained in the outer end of the spool housing of Spool assembly outer end, internal end cover is contained in valve shell body inner end Spool assembly is pushed down, sealing ring has 4, is contained in respectively in the Gewindefreistiche of relevant parts, spool orifice plate cylindrical place and internal end cover cylindrical place.

2. production wellhead anti-theft gaseous one way valve according to claim 1 is characterized in that antitheft overcurrent baffle plate is a disc, uniform 6～8 axial openings of crossing along the edge.

3. production wellhead anti-theft gaseous one way valve according to claim 1, the profile that it is characterized in that spring base is cylindrical, there is a radial ringed outer lug boss bottom, there is cavity inside, cavity first half internal diameter is greater than the Lower Half internal diameter, lower port has a radial ringed inner convex platform, and 3 vertical sipes of the uniform processing in position, circumference middle and upper part form 3 vertical narrow frames.