CN2203999Y

CN2203999Y - Well head arrangement for petroleum prodn. made by cold extrusion welding

Info

Publication number: CN2203999Y
Application number: CN 94230287
Authority: CN
Inventors: 姜永恩; 杨友毅; 乔焕凡; 牟廉儒; 王福春; 包文生; ***
Original assignee: Liaohe Oilfield Cold Extrusion Metal Products Factory
Current assignee: Liaohe Oilfield Cold Extrusion Metal Products Factory
Priority date: 1994-09-21
Filing date: 1994-09-21
Publication date: 1995-07-26
Anticipated expiration: 2004-09-21

Abstract

The utility model relates to a well head of oil extraction with a cold extrusion welding type used for oil extraction, which is composed of a gate valve with a sleeve pipe, a big four-way component, a small four-way component, a sleeve pipe flange and an oil pipe joint. The well head of oil extraction in the prior art is made by casting with easy leakage, a complicated structure and other problems, and thus the use is very inconvenient. The utility model is processed by a cold extrusion mode. A short joint of a mandrel hanger is arranged in the big four-way component, and the lower part is provided with a mandrel hanger. The short joint of the mandrel hanger is in an entire single structure, and the mandrel hanger with the big four-way component of a cone base in the original structure is replacced. The utility model has the advantages of simple structure, strength increases, convenient use and long service life.

Description

Well head arrangement for petroleum prodn. made by cold extrusion welding

The utility model belongs to the oil well ground installation; Be particularly related to a kind of cold extrusion welded type production wellhead that is used to recover the oil.

A kind of requisite wellhead for production is being brought into play enormous function in world today's oil exploitation, use it can control the oil and gas production of oilbearing stratum effectively, can also prevent the generation of gas blowout accident, the production wellhead of existing technology is from architectural feature, can be divided into critical pieces such as valve body, four-way, during manufacturing, obtain, often have the phenomenon of sand holes in the use because of casting because of unreasonable structure and valve body with casting method, and make the low phenomenon of yield rate, also see repeatly and not bright; A kind of cold-stamped production wellhead can overcome and adds the drawback of bringing man-hour, and can simplify the parts of former production wellhead, brings convenience to the user.

Task of the present utility model is exactly a kind of cold extrusion wellhead for production that designs for the deficiency that overcomes production wellhead in the existing technology.Sand holes when it can prevent because of casting cause leakage of oil, gas defective, and can simplify wellhead assembly, bring convenience to the operator.

The utility model is achieved in that

The cold extrusion wellhead for production comprises that unit constructions such as sleeve gate, big four valve, little four way valve, clip, restriction choke, pressure meter, needle-valve, casing flange, oil pipe flange, boll-weevil hanger form.

This device is in the both sides of big four valve 2 a casing by-pass valve door to be housed respectively, valve is opened with handwheel, top at big four valve 2 connects with flange and little four way valve 3, little four way valve has four handwheels, this valve foot is a master valve 12, top is paraffin valve 13, and both sides claim oil pipe gate 14; During use the oil pipe in boll-weevil hanger in the big four 10 and the oil well is attached at simultaneously and can uses by screw thread.

When the crude oil in the oil well or natural gas directly entered into the production wellhead the inside through oil pipe, oil, gas was by the master valve 12 above the production wellhead, just the direct interior oil and gas production of control well and be transported to the surface well station.

Each parts of this device have more different with prior art during fabrication, critical piece wherein, as gate valve body, big four valve, little four way valve, existing technology adopts the casting way to obtain, and the utility model has adopted liquid cold-extrusion shaping technology, promptly select for use seamless steel pipe in compound die cavity by high pressure liquid cold extrusion and produced.

The utility model has the advantages that owing to adopt the cold-extrusion shaping way to make sleeve gate, big four valve, little four way valve, thereby simplified the structure of former production wellhead greatly, make the production wellhead volume little, in light weight, and production wellhead tension, compressive strength are increased, in addition, this well head changes the conical support formula big four of former production wellhead and the jackscrew above the boll-weevil hanger and packing into the monolithic boll-weevil hanger and makes it simple to operate, and has prolonged production wellhead application life.

The utility model is provided by following examples

Illustrated below in conjunction with accompanying drawing

Accompanying drawing 1: cold extrusion wellhead for production structural representation

Accompanying drawing 2: big four valve mechanism position schematic diagram in the cold extrusion production wellhead

The utility model is a kind of cold extrusion wellhead for production that recovers the oil in the oil field that is used for; By sleeve pipe gate valve 1, big four valve 2, little four way valve 3, clip 4, restriction choke 5, casing flange 8, tubing-head adapter flange 9 and with flange and screw rod it is combined in simultaneously; It is characterized in that below the described big four valve 2 a tubing hanger pipe nipple (not drawing among the figure) being arranged, on its big four top by flange fixing a boll-weevil hanger 10, the oil pipe hanging pup joint is that its shape of monolithic construction (Fig. 2) is whole single structure shape, adopts this structure can reduce awl seat formula big four valve in the original structure and the elements such as jackscrew, pad packing and sealing ring in the boll-weevil hanger.Make and simplify the structure.

In addition, critical piece of the present utility model, as sleeve pipe gate valve shell 1, big four valve body, housing 2, little four-way housing 3, be the cold extrusion mode and be shaped, promptly use seamless steel pipe in compound die cavity, after highly pressurised liquid cold extrusion manufacturing, again its clip 4 is welded on above the lock sleeve pipe gate valve 1, big four valve 2.

Adopt high temperature resistant lubricating grease to control flashboard in the sealed chamber of sleeve pipe gate valve 1 of the present utility model and promote and transfer, this lubricating system has replaced the original way of regularly annotating butter toward the sleeve pipe gate valve, thereby can prolong the application life of sleeve pipe gate valve.

Claims

1, a kind of cold extrusion welded type wellhead for production that is used for the oil field oil recovery; Be by sleeve pipe gate valve 1, big four valve 2, little four way valve 3, clip 4, restriction choke 5, casing flange 8, tubing-head adapter flange 9, and it is combined in simultaneously with flange and screw rod, it is characterized in that below the described big four valve 2 a tubing hanger pipe nipple being arranged, fixing a boll-weevil hanger 10 by flange on its big four valve top.

2, wellhead for production according to claim 1; It is characterized in that gate valve casing 1, big four housing, little four way valve 3 housings all adopt cold extrusion shaped after, again its clip head 11 is welded on sleeve pipe gate valve 1, big four valve, above the little four way valve.

3, wellhead for production according to claim 1; It is characterized in that in the airtight chamber of sleeve pipe gate valve high temperature resistant luboil fat being housed.