CN102364039B - Dynamic sealing device for rotary blowout preventer - Google Patents
Dynamic sealing device for rotary blowout preventer Download PDFInfo
- Publication number
- CN102364039B CN102364039B CN201110382073.8A CN201110382073A CN102364039B CN 102364039 B CN102364039 B CN 102364039B CN 201110382073 A CN201110382073 A CN 201110382073A CN 102364039 B CN102364039 B CN 102364039B
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- ring
- oilhole
- packing box
- packing
- external surface
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Abstract
The invention relates to a dynamic sealing device for blocking a rotary blowout preventer between a drill column and a borehole in drilling of oil-gas fields. The dynamic sealing device overcomes the defects that the conventional dynamic sealing device has short service life, is quick in heat emission and is easily sintered. The invention adopts the technical scheme that: a supporting ring is arranged in a packing box, the supporting ring is provided with an oil hole b and an oil hole c, and the outer surface of the supporting ring is provided with an annular groove b; a disc spring is arranged in the supporting ring, a caulking ring is arranged at the lower part of the disc spring, and the supporting ring is arranged between the caulking ring and a pressure ring; the pressure ring is provided with an oil hole a, and a V-shaped sealing ring and a spacing ring are sequentially arranged at the lower part of the pressure ring at intervals; a packing pressure ring is arranged at the lower end of a floating ring, the packing pressure ring is fixed at the end of the packing box, and the packing pressure ring is in clearance fit with a central pipe bush; and the central pipe bush is in interference fit with a central pipe, the packing box is in interference fit with an upper shell of the blowout preventer, and lubricating oil enters an oil hole in the upper shell of the blowout preventer through a bearing. The dynamic sealing device is suitable for relatively high dynamic sealing pressure, reduces sintering of the sealing ring, has low heat emitting abrasion and long service life, and reduces the abrasion rate.
Description
Technical field
The present invention relates to a kind of dynamic sealing device for oil gas field rotating blowout preventer of annular space between drilling process packing drill string and well.
Technical background
Rotating blowout preventer is to implement the requisite key equipment of under balance pressure drilling, can play the effect of packing drill string and annular space in drilling process, realizes nozzling while drilling, will return out fluid diversion well head simultaneously.Rotating blowout preventer domesticizes at present, and domestic many companies have realized the volume production of rotating blowout preventer, and general technical is mature on the whole.But the life-span of rotating blowout preventer seal is lower, the dynamic sealing device of rotating blowout preventer particularly, on-the-spot life cycle is shorter, has increased maintenance man-hours; Except the life-span is shorter, another one major issue is that sealing load grade is not high, the rotating blowout preventer movable sealing pressure that offshore company produces has reached 21MP, and it is also very immature that domestic rotating blowout preventer will reach this pressure rating, at present the rotating blowout preventer of this pressure rating volume production useless also.For reducing the maintenance workload of rotating blowout preventer, extend its overall life, just must emphasis solve the movable sealing problem of rotating blowout preventer, therefore in the urgent need to a kind of can be at the dynamic sealing device of positiver sealing under high pressure.
Summary of the invention
The object of the invention is: in order to solve, dynamic sealing device life-span of existing rotating blowout preventer is short, heating is fast, be easy to the shortcomings such as sintering, and spy provides a kind of dynamic sealing device for rotating blowout preventer.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of dynamic sealing device for rotating blowout preventer, by splicing sleeve, dish spring, spacer ring, Supporting ring, trim ring, v-ring, spacer ring, U-shaped sealing ring, floating ring, O-ring seals, packing trim ring, packing box, formed, its architectural feature is: Supporting ring is installed in packing box, on Supporting ring, be provided with oilhole b and oilhole c, oilhole b and oilhole c are uniform at circumferencial direction, quantity is respectively 4 oilholes, at the external surface of Supporting ring, is provided with annular groove b; Packing box bottom is provided with splicing sleeve, the inner surface of splicing sleeve external surface and packing box adopts matched in clearance, dish spring is arranged in splicing sleeve, during installation in compressive state, dish spring bottom is provided with spacer ring, mounting support ring between spacer ring and trim ring, the external surface of Supporting ring and the inner surface of packing box adopt interference fit, and the external surface of the inner surface of Supporting ring and central tube lining adopts matched in clearance; On trim ring, be provided with oilhole a, trim ring bottom is installed v-ring a, spacer ring a, v-ring b, spacer ring b, v-ring c, spacer ring c, v-ring d, spacer ring d, U-shaped sealing ring successively, and all opening direction is back to drilling liquid pressure side; Floating ring is installed in the bottom of U-shaped sealing ring, on the inner surface cannelure of floating ring, O-ring seals a is installed, on the external surface cannelure of floating ring, O-ring seals c is installed, packing trim ring is installed in the lower end of floating ring, packing trim ring is screwed the end at packing box, and the external surface of the inner surface of packing trim ring and central tube lining adopts matched in clearance; O-ring seals b is installed between central tube lining and central tube, between central tube lining and central tube, adopt interference fit, packing box external surface cannelure is installed twice O-ring seals d, packing box external surface and preventer upper shell inner surface adopt interference fit, and the bottom of packing box is connected with the lower surface of preventer upper shell with screw; The left side of oilhole e on packing box communicates with annular groove a, the right side of oilhole e on packing box communicates with annular groove b, the oilhole d right side of preventer upper shell communicates with annular groove a, the oilhole d top of preventer upper shell communicates with oilhole f, and extreme pressure lubricant enters the oilhole f of preventer upper shell through bearing.
The present invention also can be used for low pressure rotating blowout preventer, suitably reduces v-ring quantity, both can reduce frictional heating, can accomplish positiver sealing simultaneously.The oil liquid pressure that enters Supporting ring sealing load is according to specific needs determined, and is slightly larger than the pressure of sealed drilling fluid.
Compared with prior art, the invention has the beneficial effects as follows: (1) can be applicable to higher movable sealing pressure; (2) sealing ring frictional heating can be taken away in time by lubricating fluid, owing to being lubricating fluid and directly to contact radiating efficiency higher for sealing ring, has reduced the possibility of sealing ring sintering; (3) lubricated Supporting ring can prevent central tube teeter, the distortion extruding of the sealing ring reducing, the life-span of the sealing ring of increase; (4) water-cooling circulating system need not be installed, cooling system is single; (5) sealing ring working environment improves, and heating wearing and tearing are less, and the life-span is long; (6) circulation fluid enters packing inside, can take away the abrasive particle that internal friction produces, and makes internal work clean environment, reduces its rate of wear.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the present invention: a kind of structural representation of the dynamic sealing device for rotating blowout preventer.
In figure: 1. splicing sleeve, 2. dish spring, 3. spacer ring, 4. Supporting ring, 5. trim ring, 6.V shape sealing ring a, 7. spacer ring a, 8. v-ring b, 9. spacer ring b, 10.V shape sealing ring c, 11. spacer ring c, 12.V shape sealing ring d, 13. spacer ring d, 14.U shape sealing ring, 15. floating rings, 16.O shape sealing ring a, 17.O shape sealing ring b, 18. central tube linings, 19. packing trim rings, 20.O RunddichtringO c, 21. packing boxs, 22. preventer upper shells, 23.O shape sealing ring d, 24. oilhole a, 25 oilhole b, 26. oilhole c, 27. oilhole d, 28. oilhole e, 29. annular groove a, 30. annular groove b, 31. oilhole f, 32. bearings, 33. central tubes.
The specific embodiment
With reference to the accompanying drawings, a kind of dynamic sealing device of rotating blowout preventer, Supporting ring 4 is installed in packing box 21, on Supporting ring 4, be provided with oilhole b25 and oilhole c26, oilhole b25 and oilhole c26 are uniform at circumferencial direction, quantity is respectively 4 oilholes, at the external surface of Supporting ring 4, is provided with annular groove b30; Packing box 21 bottoms are provided with splicing sleeve 1, the inner surface of splicing sleeve 1 external surface and packing box 21 adopts matched in clearance, dish spring 2 is arranged in splicing sleeve 1, during installation in compressive state, dish spring 2 bottoms are provided with spacer ring 3, mounting support ring 4 between spacer ring 3 and trim ring 5, the inner surface of the external surface of Supporting ring 4 and packing box 21 adopts interference fit, and the external surface of the inner surface of Supporting ring 4 and central tube lining 18 adopts matched in clearance; On trim ring 5, be provided with oilhole a24, trim ring 5 bottoms are installed v-ring a6, spacer ring a7, v-ring b8, spacer ring b9, v-ring c10, spacer ring c11, v-ring d12, spacer ring d13, U-shaped sealing ring 14 successively, and all opening direction is back to drilling liquid pressure side; Floating ring 15 is installed in the bottom of U-shaped sealing ring 14, on the inner surface cannelure of floating ring 15, O-ring seals a16 is installed, on the external surface cannelure of floating ring 15, O-ring seals c20 is installed, packing trim ring 19 is installed in the lower end of floating ring 15, packing trim ring 19 is screwed in the end of packing box 21, and the external surface of the inner surface of packing trim ring 19 and central tube lining 18 adopts matched in clearance; Between central tube lining 18 and central tube 33, O-ring seals b17 is installed, between central tube lining 18 and central tube 33, adopt interference fit, packing box 21 external surface cannelures are installed twice O-ring seals d23, packing box 21 external surfaces and preventer upper shell 22 inner surfaces adopt interference fit, and the bottom of packing box 21 is connected with the lower surface of preventer upper shell 22 with screw; The left side of oilhole e28 on packing box 21 communicates with annular groove a29, the right side of oilhole e28 on packing box 21 communicates with annular groove b30, the oilhole d27 right side of preventer upper shell 22 communicates with annular groove a29, the oilhole d27 top of preventer upper shell 22 communicates with oilhole f31, and extreme pressure lubricant enters the oilhole f31 of preventer upper shell 22 through bearing 32.
During operation, according to the pressure adjustment of sealed drilling fluid, enter pressure and the flow of lubrication oil in oilhole f31, realize lubricated and cooling double action.
Claims (1)
1. the dynamic sealing device for rotating blowout preventer, by splicing sleeve, dish spring, spacer ring, Supporting ring, trim ring, v-ring, spacer ring, U-shaped sealing ring, floating ring, O-ring seals, packing trim ring, packing box, formed, it is characterized in that: Supporting ring (4) is installed in packing box (21), on Supporting ring (4), be provided with oilhole b(25) and oilhole c(26), oilhole b(25) and oilhole c(26) uniform at circumferencial direction, quantity is respectively 4 oilholes, at the external surface of Supporting ring (4), is provided with annular groove b(30); Packing box (21) bottom is provided with splicing sleeve (1), the inner surface of splicing sleeve (1) external surface and packing box (21) adopts matched in clearance, dish spring (2) is arranged in splicing sleeve (1), during installation in compressive state, dish spring (2) bottom is provided with spacer ring (3), mounting support ring (4) between spacer ring (3) and trim ring (5), the inner surface of the external surface of described Supporting ring (4) and packing box (21) adopts interference fit, and the external surface of the inner surface of described Supporting ring (4) and central tube lining (18) adopts matched in clearance; Trim ring is provided with oilhole a(24 on (5)), trim ring (5) bottom is installed v-ring a(6 successively), spacer ring a(7), v-ring b(8), spacer ring b(9), v-ring c(10), spacer ring c(11), v-ring d(12), spacer ring d(13), U-shaped sealing ring (14), all opening directions are back to drilling liquid pressure side; Floating ring (15) is installed in the bottom of U-shaped sealing ring (14), on the inner surface cannelure of floating ring (15), O-ring seals a(16 is installed), on the external surface cannelure of floating ring (15), O-ring seals c(20 is installed), packing trim ring (19) is installed in the lower end of floating ring (15), packing trim ring (19) is screwed in the end of packing box (21), and the external surface of the inner surface of packing trim ring (19) and central tube lining (18) adopts matched in clearance; Between central tube lining (18) and central tube (33), O-ring seals b(17 is installed), between central tube lining (18) and central tube (33), adopt interference fit, packing box (21) external surface cannelure is installed twice O-ring seals d(23), packing box (21) external surface and preventer upper shell (22) inner surface adopt interference fit, and the bottom of packing box (21) is connected with the lower surface of preventer upper shell (22) with screw; Oilhole e(28 on packing box (21)) left side and annular groove a(29) communicate, oilhole e(28 on packing box (21)) right side and annular groove b(30) communicate, the oilhole d(27 of preventer upper shell (22)) right side and annular groove a(29) communicate, the oilhole d(27 of preventer upper shell (22)) top and oilhole f(31) communicate, extreme pressure lubricant enters the oilhole f(31 of preventer upper shell (22) through bearing (32)).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110382073.8A CN102364039B (en) | 2011-11-28 | 2011-11-28 | Dynamic sealing device for rotary blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110382073.8A CN102364039B (en) | 2011-11-28 | 2011-11-28 | Dynamic sealing device for rotary blowout preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102364039A CN102364039A (en) | 2012-02-29 |
| CN102364039B true CN102364039B (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110382073.8A Expired - Fee Related CN102364039B (en) | 2011-11-28 | 2011-11-28 | Dynamic sealing device for rotary blowout preventer |
Country Status (1)
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| CN (1) | CN102364039B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797843A (en) * | 2012-08-03 | 2012-11-28 | 深圳市亿玛斯自动化设备有限公司 | Piston with sealing piece |
| CN104863972A (en) * | 2015-05-12 | 2015-08-26 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Dynamic seal axial circulating cooling structure of rotary blowout preventer |
| CN112196489B (en) * | 2020-09-17 | 2023-05-30 | 中油国家油气钻井装备工程技术研究中心有限公司 | Pressure compensation rotary sealing structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251869A (en) * | 1992-07-16 | 1993-10-12 | Mason Benny M | Rotary blowout preventer |
| US5746249A (en) * | 1996-11-12 | 1998-05-05 | 569.396 Alberta, Ltd. | Oil well blow-out preventer and sealing device |
| US5875841A (en) * | 1997-04-04 | 1999-03-02 | Alberta Basic Industries, Ltd. | Oil well blow-out preventer |
| CN2632303Y (en) * | 2003-05-22 | 2004-08-11 | 西南石油学院 | Rotary blowout preventer during drilling assembled sealed self-adjusting apparatus |
| CN201568007U (en) * | 2009-11-25 | 2010-09-01 | 中国石油天然气股份有限公司 | Wellhead blowout control sealing device for steam injection |
| CN202325371U (en) * | 2011-11-28 | 2012-07-11 | 西南石油大学 | Dynamic sealing device for rotating blowout preventer |
-
2011
- 2011-11-28 CN CN201110382073.8A patent/CN102364039B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251869A (en) * | 1992-07-16 | 1993-10-12 | Mason Benny M | Rotary blowout preventer |
| US5746249A (en) * | 1996-11-12 | 1998-05-05 | 569.396 Alberta, Ltd. | Oil well blow-out preventer and sealing device |
| US5875841A (en) * | 1997-04-04 | 1999-03-02 | Alberta Basic Industries, Ltd. | Oil well blow-out preventer |
| CN2632303Y (en) * | 2003-05-22 | 2004-08-11 | 西南石油学院 | Rotary blowout preventer during drilling assembled sealed self-adjusting apparatus |
| CN201568007U (en) * | 2009-11-25 | 2010-09-01 | 中国石油天然气股份有限公司 | Wellhead blowout control sealing device for steam injection |
| CN202325371U (en) * | 2011-11-28 | 2012-07-11 | 西南石油大学 | Dynamic sealing device for rotating blowout preventer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102364039A (en) | 2012-02-29 |
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Granted publication date: 20140226 Termination date: 20161128 |
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