CN2375763Y - Clamp type casing head - Google Patents
Clamp type casing head Download PDFInfo
- Publication number
- CN2375763Y CN2375763Y CN 99220856 CN99220856U CN2375763Y CN 2375763 Y CN2375763 Y CN 2375763Y CN 99220856 CN99220856 CN 99220856 CN 99220856 U CN99220856 U CN 99220856U CN 2375763 Y CN2375763 Y CN 2375763Y
- Authority
- CN
- China
- Prior art keywords
- casing
- ring
- casing seat
- hanger
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Gasket Seals (AREA)
Abstract
The utility model relates to a clamp type casing head which is a well head assembly for drilling petroleum and is used for connecting and sealing a surface casing and a production casing. The utility model is mainly composed of a hanger, a casing seat, a flange body, a locking pressure ring, a surface casing coupling clamp, a high pressure sluice valve, etc. The utility model is characterized in that the connection of the casing seat and the surface casing is fixed by pressing from top to bottom; the connection of the casing seat and the production casing is fixed in a hanging mode; the utility model has a seal mode that metal is used on a bearing surface for seal and rubber rings are used at clearance fit parts for crush seal. So, the utility model has the advantages of firm connection and reliable seal.
Description
The utility model belongs to a kind of petroleum drilling and mining wellhead assembly, especially a kind of compression type casing head that is used to connect with sealing surface pipe and production string.
Casing head is one of well mouth of oil well equipment, is used for splicing sleeve and various wellhead assembly.It under be used for suspension sleeve and Sealed casing pipe annular space, on be used for installing wellhead assemblies such as preventer and production tree.Usually adopt slips to connect or the screw thread fixing seal in the prior art.Slips is connected with toothed surface chucking sleeve pipe, and difficulty of processing is big, the poor reliability of connection; Be threaded, it is big that taper pipe thread connects difficulty.After screwing, casing head can not adjust the orientation, operation inconvenience, poor sealing performance.
The purpose of this utility model is at have the defective that casing head exists now in sealing, a kind of novel method of attachment is provided, the mode that promptly compresses up and down tightens up, when compressing, realize the dual crush seal of metal and cushion rubber, make casing head connection and sealing reliable, and can locate in any direction, use easy to operately, be easy to apply.
The technical solution of the utility model is: this compression type casing head, comprise compositions such as hanger 1, casing seat 8, jackscrew 9, flange body 14, locking pressure ring 15, surface pipe box cupling 16, high pressure flat gate valve 18, be provided with the upper and lower sealing device that compresses between casing seat 8 and the hanger 1, locking pressure ring 15 in casing seat 8 bottoms is provided with cushion rubber crush seal device with the gap location that surface pipe box cupling 16 outer circumference surfaces form, and casing seat 8 adopts suspension type to fix with being connected of production string.
The neighboring of hanger 1 is that the boss of stairstepping and casing seat 8 inner rims forms matched in clearance, install two O-ring seals 5 additional at this gap location, the centre separates with gasket ring 4, and metal pressure ring 13 is equipped with in the bottom, and the bottom is by being contained in snap ring 2 supports of hanger 1 external surface.The metal pressure ring 13 inside and outside conical surfaces of sealing device are provided with groove, are welded with soft metal gasket ring 3, respectively with the boss surface mutual extrusion effect of hanger 1 and casing seat 8, realize sealing.
Locking pressure ring 15, casing seat 8 and surface pipe box cupling 16 intersections are provided with the space, and go in ring O-ring seal 5 and gasket ring 4 are housed in the gap, install soft metal sealing mat 3 additional at surface pipe box cupling 16 tops and casing seat 8 bonding surfaces, form sealing device.The screw thread bonding surface of locking pressure ring 15 and casing seat 8 adopts saw-tooth thread.Described soft metal gasket ring 3 is good with red copper, lead.
Owing to adopt the above-mentioned mode that compresses up and down to tighten up, when compressing, realize the dual crush seal of metal and cushion rubber, make casing head connection and sealing reliable, 270 tons of suspended loads, the intensity pressure testing reaches 70MPa, and operating temperature is at-30 ℃-120 ℃, and can locate in any direction, use easy to operately, be easy to apply.
Below in conjunction with accompanying drawing the utility model is elaborated.
Accompanying drawing is a structural representation of the present utility model.
The utility model is made up of hanger 1, casing seat 8, flange body 14, locking pressure ring 15 and high pressure flat gate valve 24 etc., the outer circumference surface of hanger 1 is that stairstepping and casing seat 8 are furnished with annular space, two O-ring seals 5 are housed in annular space, the centre installs gasket ring 4 additional, following end toper pressure ring 13 is by snap ring 2 supports, is welded with soft metal sealing mat 3 at the inside and outside conical surface of pressure ring.After hanger 1 is put into casing seat 8 reposefully, in the time of jackscrew 9 location, metal washer 7 and sealing ring 6, and the reaction force of metal pressure ring 13 and 4 pairs of hanger 1 extruding forces of gasket ring carry out reliable crush seal to metallic gasket 3 and O-ring seal 5 respectively.
Casing seat 8, locking pressure ring 15 become matched in clearance with surface pipe box cupling 16 outer circumference surfaces, and O-ring seal 5 and gasket ring 4 be housed in the intersection, install soft metal sealing mat 3 additional at surface pipe box cupling 17 tops and casing seat 8 joints, locking pressure ring 15 and casing seat 8 are connected by saw-tooth thread, and surface pipe box cupling 16 and surface pipe 17 are connected by taper pipe thread.Screw locking pressure ring 15 and upwards compress gasket ring 4 and cushion rubber 5, produce interference and push and seal; Surface pipe box cupling 16 upwards pushes soft metal sealing mat 3 simultaneously, forms sealing.Locking pressure ring 15 is for splitting two lobe formula structures, and each tightens up dive key 19 with countersunk head screw 20 centre.Two lobes are closed up, to key in the groove location, then will lock pressure ring 15 with special spanner upwards screws in the corresponding screw of casing seat 8, the inner face that screws back locking pressure ring 15 acts on the downward pressure of surface pipe box cupling 16 upper surfaces and soft metal gasket ring 3, reached the good result that not only compresses but also seal.
At the both sides of casing seat 8 difference mounting flange body 14, flange body 14 is fastening by bolt 11 and casing seat 8, and the centre is added with steel ring 12.Flange body 14 can join with high pressure flat gate valve 18.
Claims (6)
1, a kind of compression type casing head, form by hanger (1), casing seat (8), jackscrew (9), flange body (14), locking pressure ring (15), surface pipe box cupling (16), high pressure sluice valve (18) etc., it is characterized in that: be provided with the upper and lower sealing device that compresses between casing seat (8) and the hanger (1), locking pressure ring (15) in casing seat (8) bottom is provided with cushion rubber crush seal device with the gap location that surface pipe box cupling (16) outer circumference surface forms, and casing seat (8) adopts suspension type to fix with being connected of production string.
2, compression type casing head according to claim 1, it is characterized in that: the neighboring of hanger (1) is that the boss of stairstepping and casing seat (8) inner rim forms matched in clearance, install two O-ring seals (5) additional at this gap location, the centre separates with gasket ring (4), metal pressure ring (13) is equipped with in the bottom, and the bottom is by being contained in snap ring (2) support of hanger (1) external surface.
3, compression type casing head according to claim 2, it is characterized in that: the inside and outside conical surface of metal pressure ring (13) of sealing device is provided with groove, be welded with soft metal gasket ring (3),, realize sealing respectively with the boss surface mutual extrusion effect of hanger (1) and casing seat (8).
4, compression type casing head according to claim 1, it is characterized in that: locking pressure ring (15), casing seat (8) and surface pipe box cupling (16) intersection are provided with the space, ring packing cushion rubber (5) and gasket ring (4) are housed in the gap, install soft metal sealing mat (3) additional at surface pipe box cupling (16) top and casing seat (8) bonding surface, form sealing device.
5, compression type casing head according to claim 1 is characterized in that: the screw thread bonding surface of locking pressure ring (15) and casing seat (8), adopt saw-tooth thread.
6, according to claim 3 or 4 described compression type casing heads, it is characterized in that: described soft metal gasket ring (3) is red copper, lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220856 CN2375763Y (en) | 1999-05-20 | 1999-05-20 | Clamp type casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220856 CN2375763Y (en) | 1999-05-20 | 1999-05-20 | Clamp type casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2375763Y true CN2375763Y (en) | 2000-04-26 |
Family
ID=34011533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99220856 Expired - Fee Related CN2375763Y (en) | 1999-05-20 | 1999-05-20 | Clamp type casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2375763Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102016226A (en) * | 2008-04-28 | 2011-04-13 | 阿克海底公司 | Internal tree cap and ITC running tool |
-
1999
- 1999-05-20 CN CN 99220856 patent/CN2375763Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102016226A (en) * | 2008-04-28 | 2011-04-13 | 阿克海底公司 | Internal tree cap and ITC running tool |
| CN103485740B (en) * | 2008-04-28 | 2017-03-01 | 阿克海底公司 | Internal tree cap and ITC running tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |