CN200958383Y - Double-slips metal integrated sealed sleeved pipe head - Google Patents
Double-slips metal integrated sealed sleeved pipe head Download PDFInfo
- Publication number
- CN200958383Y CN200958383Y CN 200620078174 CN200620078174U CN200958383Y CN 200958383 Y CN200958383 Y CN 200958383Y CN 200620078174 CN200620078174 CN 200620078174 CN 200620078174 U CN200620078174 U CN 200620078174U CN 200958383 Y CN200958383 Y CN 200958383Y
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- CN
- China
- Prior art keywords
- slips
- casing head
- sleeve head
- dual
- grip
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- 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 - Lifetime
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Abstract
The utility model provides a double-spider full metallic sealing integral sleeve head for oil field, which mainly comprises an integral sleeve head body, a mandrel type suspension device, a flat valve, a pipe plug, a BT seal ring, a grease-filling valve, and a double-spider suspension device, which is mainly composed of a spider casing and right and counter spiders. A top screw, a stopping bolt, the BT seal ring and the grease-filling valve are arranged on the upper of the sleeve head body and the mandrel type suspension device, while the lower is provided with a metallic seal ring. The double-spider suspension device is positioned at the lower end of the sleeve head body, and two metallic seal rings are positioned on the step above the upper spider. For the utility model integrates the double-spider suspension device into the existing integral sleeve head lower end, the overall sealing property, pressure resistance and the reliability of the sleeve head have been improved, and the application scope of the sleeve head is widened. Moreover, with the overall metallic sealing, the service life is prolonged, and the poisoning of the people and livestock, and the environmental pollution accident caused by unsealing and the gas leakage of the well can be avoided.
Description
Affiliated technical field
The utility model relates to the control head in a kind of field produces, particularly a kind of dual-grip all-metal seal integral-type casing head
Background technology
Casing head is the indispensable equipment of splicing sleeve and wellhead assembly in oil, the natural gas drilling process.At present, casing head is generally split type and monolithic, all disposes anti-slip-type hanger or axle formula hanger.Split type casing head in use, is installed inconvenience, wastes time and energy; The monolithic casing head, rational in infrastructure, save raw material, and reduce the erection procedure of a preventer, be easy to assembling.Inverted slips formula hanger in use is prone to the not firm phenomenon of obvolvent, and sleeve pipe is play up and down, and sealing performance and security reliability are poor, also the easy damaged sleeve pipe; Adopt the axle formula hanger of the airtight closure of PT-CQ, though the more anti-slip-type casing tube head of sealing performance, withstand voltage properties and functional reliability increases, but for hanging the bigger surface pipe of big caliber, because its structure is limit, in the confined space of casing head bottom, axle formula hanger is difficult to settle, thereby uses inconvenience.
Summary of the invention
For overcoming the deficiencies in the prior art part, the utility model provides a kind of rational in infrastructure, good seal performance, withstand voltage properties is strong, reliability is high, applied widely dual-grip all-metal seal integral-type casing head.
The technical scheme that its technical problem that solves the utility model adopts is: it mainly comprises casing head body, axle formula hanger, flap type, plug, BT sealing ring and grease pouring valve; The casing head body is provided with bypass, and flap type or plug are equipped with in the outside of bypass; Two axle formula hangers place respectively on the going up of casing head chamber body, middle bench or the conical surface, and the top between outside casing head inner body wall and axle formula hanger is provided with jackscrew, dogbolt, BT sealing ring and grease pouring valve; It is characterized in that: also contain the dual-grip hanger that comprises slips housing, positive slips and anti-slips, positive and negative slips places the inner chamber of slips housing, and the upper end of top slips is higher than the upper end of slips housing; Slips lower part of frame flange is provided with several pilot holes and connecting bolt links to each other with casing head body lower end, and the upper end of top slips contacts with the step of casing head inner chamber.
The positioning runner of positive and negative slips and positioning sliding block are reverse setting.
For further improving the sealing performance and the security reliability of casing head, bottom between the casing head inner body wall and the axle formula hanger outside is provided with metal o-ring, wear out to avoid traditional rubber seal to be subjected to the erosion of down-the hole corrosion gas, cause accident generation poorly sealed, that the interior gas leakage of well makes person poultry poisoning, contaminated environment.
Step top above upper slips is provided with the twice metal o-ring, and the two seals circle is conical surface contact intussusception.
The beneficial effects of the utility model are: owing to set up the dual-grip hanger that is used to hang the bigger surface pipe of caliber in the lower end of existing monolithic casing head, can make the obvolvent of surface pipe tighter on the one hand, play a supporting role on the other hand, avoid the phenomenon of the whole sinking of casing head to take place, improved overall tightness, resistance to pressure and the reliability of casing head, made the scope of application of casing head wider.In addition, owing to adopted the all-metal sealing, prolong application life, avoided traditional rubber seal to be subjected to the erosion of down-the hole corrosion gas and wear out, caused gas leakage in poorly sealed, the well to make the accident generation of person poultry poisoning, contaminated environment.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the zoomed-in view of local I among Fig. 1;
Fig. 3 is the zoomed-in view of local I I among Fig. 1;
Fig. 4 is the zoomed-in view of local I II among Fig. 1.
Among the figure: 1 is the casing head body, 2 is axle formula hanger, 3 is grease pouring valve, 4 is bypass, 5 is axle formula hanger, 6 is flap type, 7 is bypass, 8 is anti-slips, 9 is the slips housing, 10 is positive slips, 11 is connecting bolt, 12 is pilot hole, 13 is positioning runner, 14 is positioning sliding block, 15 is step, 16 is plug, 17 is dogbolt, 18 is jackscrew, 19 is the BT sealing ring, 20 is metal o-ring, 21 is metal o-ring, 22 is back-up ring, 23 is metal o-ring.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
The utility model mainly comprises casing head body 1, axle formula hanger 2,5, flap type 6, plug 16, BT sealing ring 19, grease pouring valve 3 and dual-grip hanger; Monolithic casing head body 1 top and middle part are provided with bypass 4,7, and flap type 6 or plug 16 are equipped with in the outside of bypass 4,7.Two axle formula hangers 2,5 place respectively on the conical surface at the going up of casing head body 1 inner chamber, middle part, constitute the two-stage suspended structure, and its inner chamber is provided with the airtight closure of PT-CQ, is used to hang the less protective casing of caliber.Top between casing head body 1 and axle formula hanger 2 is provided with jackscrew 18, BT sealing ring 19, dogbolt 17 and grease pouring valve 3, bottom between casing head body 1 inwall and axle formula hanger 2 is provided with twice ring-type metal o-ring 20 (being made by stainless steel material), wear out to avoid traditional rubber seal to be subjected to the erosion of down-the hole corrosion gas, cause accident generation poorly sealed, that the interior gas leakage of well makes person poultry poisoning, contaminated environment.Top between casing head body 1 and axle formula hanger 5 is provided with jackscrew 18, BT sealing ring 19 and grease pouring valve 3, bottom between casing head body 1 inwall and axle formula hanger 5 is provided with the tubular metal o-ring 21 (being made by stainless steel material) of frustum, and the below of this metal o-ring 21 is provided with the back-up ring 22 that links to each other with axle formula hanger 5 by screw thread.Mainly the dual-grip hanger of being made up of slips housing 9, positive slips 10 and anti-slips 8 is used to hang the bigger surface pipe of caliber; Two shape and size are identical but positive and negative slips 10,8 that the slips tooth is opposite places the inner chamber of slips housing 9, and anti-slips 8 is last, and positive slips 10 is (perhaps opposite) down; And the dentation bulge loop in positive and negative 10, the 8 slips outside places the dentation groove of the intracavity sidewall of slips housing 9, and the positioning runner 13 of positive and negative slips 10,8 and positioning sliding block 14 are setting (also can be reverse setting) in the same way.The upper end of the anti-slips 8 in top is higher than the upper end of slips housing 9; Slips housing 9 links to each other with casing head body 1 lower end by eight pilot holes 12 on the flange of its underpart and connecting bolt 11, and the upper end of the anti-slips 8 in top contacts with the circular step 15 of casing head body 1 inner chamber.These step 15 tops are provided with twice metal o-ring 23 (being made by stainless steel material), and twice metal o-ring 23 is conical surface contact intussusception.When needs hang surface pipe, connecting bolt 11 to be tightened, anti-slips 8 instead, is just blocking 8,10 watts to radially shrinking owing to be subjected to the restriction of its upper step 15, and promptly positioning sliding block 14 slides in positioning runner 13, thereby holds surface pipe tightly, makes its suspension.Because the double action of positive and negative slips 10,8 is more firm to the obvolvent of surface pipe, has improved sealing performance and functional reliability.In addition, because the supporting role of positive slips 10 avoids the phenomenon of the whole sinking of casing head to take place.
Claims (4)
1, dual-grip all-metal seal integral-type casing head mainly comprises casing head body, axle formula hanger, flap type, plug, BT sealing ring and grease pouring valve; The casing head body is provided with bypass, and flap type or plug are equipped with in the outside of bypass; Two axle formula hangers place respectively on the going up of casing head chamber body, middle bench or the conical surface, and the top between outside casing head inner body wall and axle formula hanger is provided with jackscrew, dogbolt, BT sealing ring and grease pouring valve; It is characterized in that: also contain the dual-grip hanger that comprises slips housing, positive slips and anti-slips, positive and negative slips places the inner chamber of slips housing, and the upper end of top slips is higher than the upper end of slips housing; The slips housing links to each other with casing head body lower end by several pilot holes and the connecting bolt that its underpart flange is provided with, and the upper end of top slips contacts with the step of casing head inner chamber.
2, dual-grip all-metal seal integral-type casing head according to claim 1, it is characterized in that: the positioning runner of above-mentioned positive and negative slips and positioning sliding block are reverse setting.
3, dual-grip all-metal seal integral-type casing head according to claim 1 is characterized in that: the bottom between the casing head inner body wall and the axle formula hanger outside is provided with metal o-ring.
4, dual-grip all-metal seal integral-type casing head according to claim 1, it is characterized in that: the step top above the dual-grip hanger is provided with the twice metal o-ring, and the two seals circle is conical surface contact intussusception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620078174 CN200958383Y (en) | 2006-09-11 | 2006-09-11 | Double-slips metal integrated sealed sleeved pipe head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620078174 CN200958383Y (en) | 2006-09-11 | 2006-09-11 | Double-slips metal integrated sealed sleeved pipe head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200958383Y true CN200958383Y (en) | 2007-10-10 |
Family
ID=38785263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620078174 Expired - Lifetime CN200958383Y (en) | 2006-09-11 | 2006-09-11 | Double-slips metal integrated sealed sleeved pipe head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200958383Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050181A (en) * | 2016-06-30 | 2016-10-26 | 中国石油集团西部钻探工程有限公司 | Thermal recovery casing head |
| CN107461160A (en) * | 2017-04-19 | 2017-12-12 | 西南石油大学 | A kind of arc form flexibility slip insert long-life casing head |
-
2006
- 2006-09-11 CN CN 200620078174 patent/CN200958383Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050181A (en) * | 2016-06-30 | 2016-10-26 | 中国石油集团西部钻探工程有限公司 | Thermal recovery casing head |
| CN106050181B (en) * | 2016-06-30 | 2019-04-23 | 中国石油集团西部钻探工程有限公司 | Thermal extraction casing head |
| CN107461160A (en) * | 2017-04-19 | 2017-12-12 | 西南石油大学 | A kind of arc form flexibility slip insert long-life casing head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071010 |
|
| EXPY | Termination of patent right or utility model |