CN202284459U - Rotary sealing device for wellhead of oil well - Google Patents
Rotary sealing device for wellhead of oil well Download PDFInfo
- Publication number
- CN202284459U CN202284459U CN2011201629686U CN201120162968U CN202284459U CN 202284459 U CN202284459 U CN 202284459U CN 2011201629686 U CN2011201629686 U CN 2011201629686U CN 201120162968 U CN201120162968 U CN 201120162968U CN 202284459 U CN202284459 U CN 202284459U
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- central tube
- oil well
- sealing
- upper shell
- rotary sealing
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Abstract
The utility model discloses a rotary sealing device for a wellhead of an oil well to seal the wellhead in rotating operation or stop operation of drill strings in well repair operation in the petroleum industry. The device comprises an upper shell, a lower shell, central pipes, square complement cores, sealing capsules and gland assemblies, wherein the sealing capsules are arranged in the central pipes; the central pipes are arranged in the upper shell and the lower shell; thrust bearings and main bearings are arranged between the central pipes and the upper shell; the square complement cores and the gland assemblies are arranged on the tops of the central pipes and the sealing capsules; stabilizing bearings are arranged below the main bearings; and central holes of the sealing capsules are concentric and have different shapes. Due to the stabilizing bearings, the problem that lower parts of the central pipes are away from a supporting point of the bearings and the central pipes easily swings is solved, and an effect of sealing the lower parts of the central pipes is improved well. Meanwhile, an application range is widened, and the device can adapt to cylindrical drill strings and square drill strings.
Description
Technical field
The utility model relates to a kind of wellhead equipment of oil well repairing operation, and particularly a kind of well mouth of oil well rotary sealing appts uses the utility model in the drill string rotating operation or when stopping operation well head to be realized sealing.
Background technology
Mill, workover treatments such as milling, thread making, be to accomplish for the drilling out of oil well, cover through the rotating band of the drill string tool of starting building.In operation process, also need press and annotate highly pressurised liquid and be lubricated and well-flushing, excessive or for preventing well killing fluid because borehole pressure increases the generation blowout suddenly, all needs a kind of well mouth sealing device, protection environment and prevent blowout.Well mouth sealing device commonly used only leans on the interior circle sealing of seal capsule itself and central tube unreliable.Because the shape of the existing centre bore of seal capsule is single, the tubing string shape that is sealed is also single, and is longer from bearings point because of the central tube bottom again, swings easily, also causes its sealing bad.In order to solve the stability problem in sealing problem and the work effectively, need to improve existing well head rotary sealing appts, when being used for oil well repairing operation drill string rotating or when stopping to the sealing and the blowout prevention of well head.
Summary of the invention
The purpose of the utility model is to provide a kind of well mouth of oil well rotary sealing appts; Can play better seal and blowout prevention effect to well head when the workover treatment drill string rotating or when stopping; And make the well head rotary sealing appts can adapt to the needs of multiple shape well workover drill string, and can form sealing to the cylinder bur post, also can realize sealing by the square shaped drill string; Enlarge its scope of application, increase work efficiency.
The present technique solution can reach above-mentioned purpose: a kind of well mouth of oil well rotary sealing appts comprises upper shell, lower house, central tube, square bushing, seal capsule and gland assembly; Seal capsule is loaded in the central tube; Central tube is installed in upper shell and the lower house, and thrust bearing and base bearing are housed between central tube and upper shell, at the top of central tube and seal capsule square bushing and gland assembly is installed; Alignment bearing is housed below base bearing, and the centre bore of seal capsule is similar shape not with one heart.
The utility model compared with prior art has following useful effect: the utility model has been set up alignment bearing below the central tube outside main bearing; It is longer from bearings point to have solved the central tube bottom; The problem of swing takes place easily; Also the sealing effectiveness of its underpart has been had preferably and improved, cylindrical is set up sealing ring and has further been improved sealing effectiveness in its underpart in addition.The utility model improves the shape of seal capsule centre bore, can adapt to columniform drill string and square drill string, has enlarged the scope of application.Improve the structure of gland assembly simultaneously, made things convenient for on-the-spot installation, improved operating efficiency.
Description of drawings
Fig. 1 is the front view of the utility model structural representation.
Fig. 2 is the vertical view of the utility model structural representation.
Fig. 3 is the front view of the utility model seal capsule.
Fig. 4 is the vertical view of the utility model seal capsule.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to Fig. 1 and Fig. 2; A kind of well mouth of oil well rotary sealing appts; Comprise upper shell 1, lower house 14, central tube 3, square bushing 4, seal capsule 5 and gland assembly 18; Seal capsule 5 is loaded in the central tube 3, and central tube 3 is installed in upper shell 1 and the lower house 14.Thrust bearing 2 and base bearing 16 are housed between central tube 3 and upper shell 1, square bushing 4 and gland assembly 18 are installed, alignment bearing 15 is housed below base bearing 16 at the top of central tube 3 and seal capsule 5.Upper shell 1 is connected through connecting bolt 11 with lower house 14, in the position of upper shell 1 corresponding thrust bearing 2, is provided with priming cup 9, can be lubricated whole bearings.Lift hook 10 is used for the lifting of the utility model at well head, and the top cylindrical of central tube 3 also is provided with sealing ring 8, realizes the sealing of top cylindrical.The utility model is provided with alignment bearing 15, has solved because central tube 3 bottoms are longer vibration problems in rotation, the stability when having strengthened rotation.The concentric not similar shape of the centre bore of seal capsule 5 is meant that centre bore is provided with circular and square seal section, and its circular seal section cooperates with the round bur bar; Its quad seal section cooperates with kelly bar, and concrete structure is referring to Fig. 3 and Fig. 4.Seal capsule 5 centre bores have quad seal section and circular seal section, and no matter drilling tool is square body or cylinder, all has sealing function.Square bushing 4 is for opposite divides the bodily form, and gland assembly 18 is formed like this and is convenient to on-the-spot the installation also for opposite divides the bodily form.Gland assembly 18 is fixing with central tube 3 through connecting bolt 17, and drill string transfers a torque to square bushing 4 through the outer tetragonal prism of himself.The upper surface of the outer, top of seal capsule 5 and lower surface are provided with first sealing ring 6 and second sealing ring 7, the sealing effectiveness between enhanced leaktightness capsule 5 and the central tube 3.Cylindrical is provided with the 3rd sealing ring 12 and the 4th sealing ring 13 in the bottom of central tube 3, strengthens the sealing effectiveness between central tube 3 bottoms and the lower house 14.
In use, earlier seal capsule 5 is set on the drill string in the device outside, seal capsule 5 is lowered in this device central tube 3 with drill string; Gland assembly 18 is installed on the central tube 3 through connecting bolt 17, puts into square bushing 4.In use, drill string drives central tube 3 rotations by square bushing 4 through gland assembly 18 through the power rotation.This device has guaranteed sealing and the blowout prevention between well head and the drill string, for guaranteeing the lubricated of whole bearings, through priming cup 9 grease ups.
Claims (7)
1. well mouth of oil well rotary sealing appts; Comprise upper shell (1), lower house (14), central tube (3), square bushing (4), seal capsule (5) and gland assembly (18); Seal capsule (5) is loaded in the central tube (3); Central tube (3) is installed in upper shell (1) and the lower house (14), and thrust bearing (2) and base bearing (16) are housed between central tube (3) and upper shell (1), at the top of central tube (3) and seal capsule (5) square bushing (4) and gland assembly (18) is installed; It is characterized in that in the below of base bearing (16) alignment bearing (15) being housed, the centre bore of seal capsule (5) is similar shape not with one heart.
2. a kind of well mouth of oil well rotary sealing appts according to claim 1 is characterized in that the concentric not similar shape of centre bore of said seal capsule (5) is meant that centre bore is provided with circular and square seal section, and its circular seal section cooperates with the round bur bar; Its quad seal section cooperates with kelly bar.
3. a kind of well mouth of oil well rotary sealing appts according to claim 1 is characterized in that said square bushing (4) divides the bodily form for opposite.
4. a kind of well mouth of oil well rotary sealing appts according to claim 1 is characterized in that said gland assembly (18) divides the bodily form for opposite.
5. a kind of well mouth of oil well rotary sealing appts according to claim 1 and 2 is characterized in that the upper surface and the lower surface of the outer, top of said seal capsule (5) is provided with first sealing ring (6) and second sealing ring (7).
6. a kind of well mouth of oil well rotary sealing appts according to claim 1 is characterized in that the bottom cylindrical of said central tube (3) is provided with the 3rd sealing ring (12) and the 4th sealing ring (13).
7. a kind of well mouth of oil well rotary sealing appts according to claim 1 is characterized in that the position of the corresponding thrust bearing of said upper shell (1) (2) being provided with priming cup (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629686U CN202284459U (en) | 2011-05-12 | 2011-05-12 | Rotary sealing device for wellhead of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629686U CN202284459U (en) | 2011-05-12 | 2011-05-12 | Rotary sealing device for wellhead of oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202284459U true CN202284459U (en) | 2012-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201629686U Expired - Fee Related CN202284459U (en) | 2011-05-12 | 2011-05-12 | Rotary sealing device for wellhead of oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202284459U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869844A (en) * | 2017-03-21 | 2017-06-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of bridging plug bores mill anti-anti-twisted device and reaction torque monitoring system |
| CN109915045A (en) * | 2017-12-13 | 2019-06-21 | 中国石油化工股份有限公司 | Light maintenance operation well liquid controling pipe line matches oily rotatory sealing technique and device |
| CN115341870A (en) * | 2022-08-24 | 2022-11-15 | 山东省地质矿产勘查开发局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | High-temperature steam upward-spraying prevention device for well washing and tripping of high-temperature geothermal well |
-
2011
- 2011-05-12 CN CN2011201629686U patent/CN202284459U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869844A (en) * | 2017-03-21 | 2017-06-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of bridging plug bores mill anti-anti-twisted device and reaction torque monitoring system |
| CN109915045A (en) * | 2017-12-13 | 2019-06-21 | 中国石油化工股份有限公司 | Light maintenance operation well liquid controling pipe line matches oily rotatory sealing technique and device |
| CN109915045B (en) * | 2017-12-13 | 2022-07-26 | 中国石油化工股份有限公司 | Rotary sealing process and device for oil distribution of hydraulic control pipeline of minor repair well |
| CN115341870A (en) * | 2022-08-24 | 2022-11-15 | 山东省地质矿产勘查开发局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | High-temperature steam upward-spraying prevention device for well washing and tripping of high-temperature geothermal well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20130512 |