CN104963649A - Embedded sealing and isolating sealed casing head - Google Patents
Embedded sealing and isolating sealed casing head Download PDFInfo
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- CN104963649A CN104963649A CN201510443454.0A CN201510443454A CN104963649A CN 104963649 A CN104963649 A CN 104963649A CN 201510443454 A CN201510443454 A CN 201510443454A CN 104963649 A CN104963649 A CN 104963649A
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- casing
- hanger
- casing head
- head body
- valve
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Abstract
The invention discloses an embedded sealing and isolating sealed casing head, comprising a base assembly, a slips hanger, two rubber seal rings, two grease injection valves, two flat gate valves, a pressure gauge stop valve assembly, a pressure gauge, a metal sealed hanger, a casing head body, two threaded flanges, a pipe plug joint, two drain plugs, an oil-string casing, and an intermediate casing. The casing head is advantaged by low switching moment. A balancing pole on the tail of a valve can make operation of the valve portable and flexible in high-pressure load, and integrated sealing property of the casing head is ensured. All sealing backing rings and hanger sealing components use metal sealing, and the annular space of the casing is preferably sealed, and changing fittings is more convenient and easy.
Description
Technical field
The present invention relates to a kind of oil field petroleum machinery gas-injection oil-extraction well opening casing head, particularly relate to a kind of embedded packing sealing shroud tube head.
Background technology
The hanger of existing casing head device is formed primarily of hanger body and metal sealing assembly.This traditional structure design is in oil recovery, can also normally use in water injection work, but gas injection operation requires higher to product specification rank, performance class, and the structure design of ordinary casing head unit at work safety factor can reduce greatly.Show existing casing head device according to the data of oil field feedback and inject CO to down-hole
2often CO is there is in gas operation
2leakage Gas, can only discharge bottom pressure once occur to leak according to existing technical condition, cause very serious consequence.The first, discharge a large amount of highdensity CO
2gas, in air, impacts the daily life of the periphery masses while affecting natural ecological environment; The second, casing head occurs to leak and causes great threat to workman's life security of field operation, the CO under Injection Well
2gas is all low temperature liquid, even if channeled to temperature aboveground also below-40 DEG C, the operating pressure of additional more than 20MPa, so once leak suddenly, the body being sprayed onto operating worker is breakneck; 3rd, just later period maintenance is related to once generation leakage accident, oil field equipment is mostly made up of huge steel machinery structure, once maintenance will relate to a large amount of mechanized equipment of migration, so need to drop into a large amount of manpower and also slattern a large amount of energy as water resource, electric energy etc. simultaneously.In sum ordinary casing head unit safety factor in gas injection operation process low, easily cause environment pollution, waste energy, because the needs of the times can not be adapted to better.In order to solve above-mentioned in esse problem, design is needed to have developed the present invention's embedded packing sealing shroud tube head according to oil field.
Summary of the invention
Object of the present invention: provide a kind of embedded packing sealing shroud tube head, adopts metal sealing mandrel type hanger, directly rotates upper button 5 1/2 inches of sleeve pipes by landing joint, easy for installation, substantially increases the operating efficiency of oil extraction in oil field field worker; Hanger Position Design has one hanger secondary seal ring, forces its dilatancy to reach the effect of sealing, safety leakage proof when metal sealing loses efficacy by injecting high pressure sealing liquid in hanger secondary seal ring; Greatly reduce the leadage coefficient of casing head, eliminate the maintenance cost of later stage use procedure, energy conservation, decrease environment pollution.
To achieve these goals, technical scheme of the present invention is:
A kind of embedded packing sealing shroud tube head, comprises base assembly, slips hanger, two rubber seal, two grease pouring valves, two flat gate valves, stop valve for pressure gauge assembly, pressure meter, metal sealing hanger, casing head body, two thread flanges, plug joint, two plug screws of releasing, production string and protective casings; Described protective casing is coaxially suspended on the bottom of described casing head body by described slips hanger, two described rubber seal are coaxially nested with in the outside of described protective casing, two described grease pouring valves are separately positioned on the side of described protective casing and correspondingly with described two rubber seal connect, and two described plug screws of releasing are separately positioned on the opposite side of described protective casing and correspondingly with described two rubber seal connect; Two described flat gate valves are symmetricly set on the two ends, left and right of described casing head body respectively, described plug joint is connected to by described thread flange and is positioned on the described flat gate valve of left end, described stop valve for pressure gauge assembly is connected to by described thread flange and is positioned on the described flat gate valve of right-hand member, and described pressure meter is connected on described stop valve for pressure gauge assembly; Described metal sealing hanger is coaxially arranged in described casing head body, be positioned at the top of described casing head body, described production string is coaxially connected on described metal sealing hanger, the bottom of described production string is positioned at described protective casing, and described protective casing is fixed by described base assembly.
Above-mentioned embedded packing sealing shroud tube head, wherein, the top flange of described casing head body is provided with eight jackscrews, and eight described jackscrews are uniformly distributed, and eight described jackscrews are provided with caulking gum part.
Above-mentioned embedded packing sealing shroud tube head, wherein, the top flange of described casing head body is provided with two stop jackscrews, and two described stop jackscrews are symmetrical arranged about described casing head body.
Above-mentioned embedded packing sealing shroud tube head, wherein, two described thread flanges are connected with described two flat gate valves respectively by eight bolts, and and are tightly connected by gasket ring between described two flat gate valves.
Above-mentioned embedded packing sealing shroud tube head, wherein, described thread flange is threaded and is connected by threaded adapter with described plug joint.
Above-mentioned embedded packing sealing shroud tube head, wherein, be provided with hanger secondary seal ring in described casing head body, between described casing head body and described metal sealing hanger, the both sides of described hanger secondary seal ring are respectively equipped with the first one way valve and the second one way valve.
Above-mentioned embedded packing sealing shroud tube head, wherein, the upper flange surface of described casing head body is provided with a gasket ring.
The flap type that other positions of the present invention use is made up of component such as valve body, flashboard, valve seat, valve gap, valve rod, balancing poles, valve is rising stem type structure, two load-bearing capacities strong thrust ball bearing is housed to bear the load of valve opening and closing in valve, thus there is the advantage that switch moment is little, operation light and flexible under the balancing pole of valve body afterbody can make valve can realize high-voltage load situation, ensure that the overall sealing performance of apparatus of the present invention; Gasket ring and hanger seal all adopt metal sealing, well can seal casing annulus, change accessory easily convenient.
Accompanying drawing explanation
Fig. 1 is the sectional view of the present invention's embedded packing sealing shroud tube head.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Detailed description of the invention
Embodiments of the invention are further illustrated below in conjunction with accompanying drawing.
Refer to shown in accompanying drawing 1 and accompanying drawing 2, a kind of embedded packing sealing shroud tube head, comprises base assembly 1, slips hanger 2, two rubber seal 3, two grease pouring valves 4, two flat gate valves 5, stop valve for pressure gauge assembly 7, pressure meter 8, metal sealing hanger 12, casing head body 14, two thread flanges 16, plug joint 17, two plug screws 18 of releasing, production string 19 and protective casings 20; Described protective casing 20 is coaxially suspended on the bottom of described casing head body 14 by described slips hanger 2, two described rubber seal 3 are coaxially nested with in the outside of described protective casing 20, two described grease pouring valves 4 are separately positioned on the side of described protective casing 20 and correspondingly with described two rubber seal 3 connect, and described two plug screws 18 of releasing are separately positioned on the opposite side of described protective casing 20 and correspondingly with described two rubber seal 3 connect; Two described flat gate valves 5 are symmetricly set on the two ends, left and right of described casing head body 14 respectively, described plug joint 17 is connected to by described thread flange 16 and is positioned on the described flat gate valve 5 of left end, described stop valve for pressure gauge assembly 7 is connected to by described thread flange 16 and is positioned on the described flat gate valve 5 of right-hand member, and described pressure meter 8 is connected on described stop valve for pressure gauge assembly 7; Described metal sealing hanger 12 is coaxially arranged in described casing head body 14, be positioned at the top of described casing head body 14, described production string 19 is coaxially connected on described metal sealing hanger 12, the bottom of described production string 19 is positioned at described protective casing 20, and described protective casing 20 is fixed by described base assembly 1.
The top flange of described casing head body 14 is provided with eight jackscrews 13, and eight described jackscrews 13 are uniformly distributed, and eight described jackscrews 13 are provided with caulking gum part.The effect of jackscrew 13 is that metal sealing hanger 12 moves up, and jackscrew 13 carries caulking gum part, can realize good sealing.
The top flange of described casing head body 14 is provided with two stop jackscrews 9, two described stop jackscrews 9 are symmetrical arranged about described casing head body 14, prevent metal sealing hanger 12 along with landing joint rotation when landing joint tightens the production string 19 of rotation 5 1/2 inches.
Two described thread flanges 16 are connected with described two flat gate valves 5 respectively by eight M27 bolts, and and are tightly connected by BX154 gasket ring between described two flat gate valves 5.
Described thread flange 16 with 3 1/2 inches TBG screw thread and be connected by threaded adapter with described plug joint 17, when connection relief line, lay down plug, the TBG screw thread exposing 3 1/2 inches is connected with relief line joint, after well cementing operation terminates, unload relief line joint, plug joint 17 is installed back original position.
Hanger secondary seal ring 10 is provided with in described casing head body 14, between described casing head body 14 and described metal sealing hanger 12, the both sides of described hanger secondary seal ring 10 are respectively equipped with the first one way valve 6 and the second one way valve 15, hanger secondary seal ring 10 prevents from taking urgent measure when 12 seal failure of metal sealing hanger and squeezes into high pressure sealing fluid-tight by the first one way valve 6 and the second one way valve 15 to hanger secondary seal ring 10 and live casing annulus, reduce operating risk to greatest extent, considerably increase the anti-CO of embedded packing sealing shroud tube head
2leak safety factor, effectively prevent CO
2leakage Gas pollution on the environment, simple to operate, operating efficiency is high, eliminates a large amount of later period maintenance costs, save a large amount of manpower expense and electric energy water energy equal energy source, protect environment.
The upper flange surface of described casing head body 14 is provided with a BX159 gasket ring 11, realizes sealing when casing head body 14 is connected with other drilling equipments.
Slips hanger 2 adopts WD type slips hanger, by injecting stop-leak compound in the annular space of upper and lower two grease pouring valves 4 respectively to two BT rubber seal 3, force BT rubber seal 3 to be filled to rise distortion to hold the protective casing 20 of 10 3/4 inches tightly, thus reach the effect of protective casing 20 annular space of sealing 10 3/4 inches.The effect of upper and lower two plug screws 18 of releasing is observation greasing pressure, showing that the stop-leak compound injected has been full of the annular space of whole BT rubber seal 3, now needing to stop greasing operation in greasing process when there being stop-leak compound to overflow from plug screw 18 of releasing.
Flat gate valve 5 adopts PFF78-70 flat gate valve, is controlled the break-make of runner when carry out cementing the well (Gu production string 19 of 5 1/2 inches) by 2 the PFF78-70 flat gate valves 5 opening, close the right and left.1 PFF78-70 flat gate valve 5 on the left side is opened when well cementing operation, unload plug joint 17 and connect relief line injects production string 19 from solid 5 1/2 inches of the special mud of well cementation to down-hole, simultaneously open 1 PFF78-70 flat gate valve 5 on the right, open the registration of stop valve for pressure gauge assembly 7 observed pressure table 8, by observing the progress that down-hole pressure controls to cement the well.After well cementing operation terminates, the handwheel of Rotating Plates gate valve 5 cuts out the PFF78-70 flat gate valve 5 of the right and left, closing presure table shut-off valve assemblies 7.
The effect of metal sealing hanger 12 is that the production string 19 of suspension 5 1/2 inches seals oil reservoir casing annulus.
Of the present invention manufacture and design perform according to GB/T22513-2013 " industrial gas oil drilling well and oil production equipment wellhead assembly and production tree " standard completely, all flange socket connecting portions have good interchangeability.
In sum, the flap type that other positions of the present invention use is made up of component such as valve body, flashboard, valve seat, valve gap, valve rod, balancing poles, valve is rising stem type structure, two load-bearing capacities strong thrust ball bearing is housed to bear the load of valve opening and closing in valve, thus there is the advantage that switch moment is little, operation light and flexible under the balancing pole of valve body afterbody can make valve can realize high-voltage load situation, ensure that the overall sealing performance of apparatus of the present invention; Gasket ring and hanger seal all adopt metal sealing, well can seal casing annulus, change accessory easily convenient.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention to do; or directly or indirectly use the technical field being attached to other Related products, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. an embedded packing sealing shroud tube head, is characterized in that: comprise base assembly, slips hanger, two rubber seal, two grease pouring valves, two flat gate valves, stop valve for pressure gauge assembly, pressure meter, metal sealing hanger, casing head body, two thread flanges, plug joint, two plug screws of releasing, production string and protective casings; Described protective casing is coaxially suspended on the bottom of described casing head body by described slips hanger, two described rubber seal are coaxially nested with in the outside of described protective casing, two described grease pouring valves are separately positioned on the side of described protective casing and correspondingly with described two rubber seal connect, and two described plug screws of releasing are separately positioned on the opposite side of described protective casing and correspondingly with described two rubber seal connect; Two described flat gate valves are symmetricly set on the two ends, left and right of described casing head body respectively, described plug joint is connected to by described thread flange and is positioned on the described flat gate valve of left end, described stop valve for pressure gauge assembly is connected to by described thread flange and is positioned on the described flat gate valve of right-hand member, and described pressure meter is connected on described stop valve for pressure gauge assembly; Described metal sealing hanger is coaxially arranged in described casing head body, be positioned at the top of described casing head body, described production string is coaxially connected on described metal sealing hanger, the bottom of described production string is positioned at described protective casing, and described protective casing is fixed by described base assembly.
2. embedded packing sealing shroud tube head according to claim 1, it is characterized in that: the top flange of described casing head body is provided with eight jackscrews, eight described jackscrews are uniformly distributed, and eight described jackscrews are provided with caulking gum part.
3. embedded packing sealing shroud tube head according to claim 1, it is characterized in that: the top flange of described casing head body is provided with two stop jackscrews, two described stop jackscrews are symmetrical arranged about described casing head body.
4. embedded packing sealing shroud tube head according to claim 1, it is characterized in that: two described thread flanges are connected with described two flat gate valves respectively by eight bolts, and and be tightly connected by gasket ring between described two flat gate valves.
5. embedded packing sealing shroud tube head according to claim 1, is characterized in that: described thread flange is threaded and is connected by threaded adapter with described plug joint.
6. embedded packing sealing shroud tube head according to claim 1, it is characterized in that: in described casing head body, be provided with hanger secondary seal ring, between described casing head body and described metal sealing hanger, the both sides of described hanger secondary seal ring are respectively equipped with the first one way valve and the second one way valve.
7. embedded packing sealing shroud tube head according to claim 1, is characterized in that: the upper flange surface of described casing head body is provided with a gasket ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510443454.0A CN104963649A (en) | 2015-07-24 | 2015-07-24 | Embedded sealing and isolating sealed casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510443454.0A CN104963649A (en) | 2015-07-24 | 2015-07-24 | Embedded sealing and isolating sealed casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104963649A true CN104963649A (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510443454.0A Pending CN104963649A (en) | 2015-07-24 | 2015-07-24 | Embedded sealing and isolating sealed casing head |
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| CN (1) | CN104963649A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143298A (en) * | 2017-06-07 | 2017-09-08 | 德州联合石油机械有限公司 | Oil well head annular space sealing device |
| CN108266156A (en) * | 2018-04-04 | 2018-07-10 | 盐城雄威石化通用机械设备有限公司 | A kind of high temperature and pressure wellhead for production |
| CN114293946A (en) * | 2021-12-30 | 2022-04-08 | 扬州睿德石油机械有限公司 | Blowout-preventing flow-guiding device |
-
2015
- 2015-07-24 CN CN201510443454.0A patent/CN104963649A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143298A (en) * | 2017-06-07 | 2017-09-08 | 德州联合石油机械有限公司 | Oil well head annular space sealing device |
| CN108266156A (en) * | 2018-04-04 | 2018-07-10 | 盐城雄威石化通用机械设备有限公司 | A kind of high temperature and pressure wellhead for production |
| CN114293946A (en) * | 2021-12-30 | 2022-04-08 | 扬州睿德石油机械有限公司 | Blowout-preventing flow-guiding device |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151007 |
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| WD01 | Invention patent application deemed withdrawn after publication |