CN105604486A - Bionic earthworm type composite sealing structure of roller cone bit - Google Patents
Bionic earthworm type composite sealing structure of roller cone bit Download PDFInfo
- Publication number
- CN105604486A CN105604486A CN201610008497.0A CN201610008497A CN105604486A CN 105604486 A CN105604486 A CN 105604486A CN 201610008497 A CN201610008497 A CN 201610008497A CN 105604486 A CN105604486 A CN 105604486A
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- China
- Prior art keywords
- type
- sealing
- seal ring
- shaped
- earthworm
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- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 89
- 241000361919 Metaphire sieboldi Species 0.000 title claims abstract description 21
- 239000011664 nicotinic acid Substances 0.000 title abstract 3
- 239000002131 composite material Substances 0.000 title abstract 2
- 239000011435 rock Substances 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 abstract description 5
- 239000004519 grease Substances 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 208000035389 Ring chromosome 6 syndrome Diseases 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
- E21B10/25—Roller bits characterised by bearing, lubrication or sealing details characterised by sealing details
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
- Rolling Contact Bearings (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention relates to a bionic earthworm type composite sealing structure of a roller cone bit. The structure comprises a roller cone, a bearing, a Z-shaped seal ring and a pair of O-shaped rubber rings; the Z-shaped seal ring is a main seal and plays a radial sealing role, the radial contact portion of the Z-shaped seal ring and the bearing and the radial contact portion of the Z-shaped seal ring and the roller cone are evenly provided with bionic earthworm-shaped protrusions and grooves which are shaped like an circular arc, therefore, the contact area is decreased, and friction heat is reduced; the protrusions of the Z-shaped seal ring can achieve multi-stage sealing, and the sealing reliability is improved; the grooves of the Z-shaped seal ring can store lubricating grease, and the better lubricating property is achieved; the O-shaped rubber rings are auxiliary seal, are located at the axial contact position of the Z-shaped seal ring and the roller cone and the axial contact position of the Z-shaped seal ring and the bearing respectively and play an axial sealing role, the sealing force is supplied to the Z-shaped seal ring through compression of the O-shaped rubber rings, and the advantage of automatic deformation compensation is achieved; through arrangement of the O-shaped rubber rings, vibration of the Z-shaped seal ring is reduced, and the sealing stability is improved.
Description
Technical field
The bionical earthworm type of a kind of rock bit compound sealing structure that the present invention relates to be applicable to oil drilling, geological prospecting, belongs to gear wheelBit bearing field of sealing technology.
Background technology
Rock bit is topmost rock crushing tool in drilling engineering, depends on the life-span of bearing seal the service life of rock bit. ToothWheel drill bit sealing system working environment very severe, comprising: less seal cavity, the sealing medium of tempering property of height, corrosivityDrilling fluid, high temperature, high pressure, vibration etc. Existing sealing life is shorter, and seal failure seriously causes drilling cost to increase, boreWell efficiency reduces greatly. Rock bit sealing problem has become the important technical bottleneck that restriction rock bit is used and develops, isTechnical problem in the urgent need to address.
At present, the conventional seal style of rock bit is O type rubber ring, metal floating seal. The master that rock bit sealing system existsWant problem to be: the contact area of O type rubber ring is larger, the high temperature in shaft bottom, high pressure in addition, makes the frictional force of rubber ring and rubsChafing strengthens, and rubber ring is aging, wearing and tearing aggravation, and elastomeric material hardening becomes fragile, and follows the string, thereby has aggravated the inefficacy sealing;The space of annular seal space is less to be difficult to realize multi-stage sealed, and the reliability of single-stage sealing is poor, once seal failure, whole sealing justLost efficacy; The primary sealing area of metal floating seal is metallic sealing section, does not have automatic compensation function, just after metal sealing surface wearLose sealing function.
Summary of the invention
The object of the invention is to overcome that existing cone bit bearing sealing system contact area is large, single-stage poor sealing performance, metallic sealing sectionProblem that can not auto-compensation after wearing and tearing, spy provides the bionical earthworm type of a kind of rock bit compound sealing structure.
The technical scheme that the present invention solves its technical problem employing is: the bionical earthworm type of a kind of rock bit of the present invention compound sealing structure,Formed by gear wheel, bearing, Z-type sealing ring, pair of O type rubber ring, be positioned at the annular seal space of gear wheel and bearing composition; DescribedZ-type sealing ring is primary seal, mainly plays radial multi-stage sealing function, at Z-type sealing ring and bearing, Z-type sealing ring and gear wheelProjection and the groove of the uniform bionical earthworm type in radially contact position, the structure of projection and groove is circular arc, has effectively reduced Z-typeThe contact area of sealing ring, has reduced frictional force and frictional heat; The multiple bionical earthworm type bulge-structure of Z-type sealing ring can be realizedMulti-stage sealed, improve the reliability of sealing; Can storing lubricating grease in the groove of Z-type sealing ring, there is good greasy property;Described pair of O type rubber ring is auxiliary seal, lays respectively at axially connecing of Z-type sealing ring and gear wheel, Z-type sealing ring and bearingSynapsis, mainly plays axial seal, provides sealing force by the boil down to Z-type sealing ring of O type rubber ring, makes Z-type closeSeal and bearing, Z-type sealing ring and gear wheel fit tightly, and make Z-type sealing ring better play sealing function; O type rubber ringSetting reduced the vibration of Z-type sealing ring, improved the stability of sealing.
Advantage of the present invention: 1, the bionical earthworm type of rock bit compound sealing structure adopts Z-type sealing ring and the O type of bionical earthworm typeRubber ring compound seal pattern. Z-type sealing ring is primary seal, plays radial seal effect, and O type rubber ring is auxiliary seal, risesAxial seal effect; 2, Z-type sealing ring has projection and the groove of multiple bionical earthworm types, and contact area is less, greatly reducesFrictional force and frictional heat; 3, multiple bulge-structures of Z-type sealing ring can be realized multi-stage sealedly, have improved the reliability of sealing;4, the groove of the multiple bionical earthworm types of Z-type sealing ring, can storing lubricating grease, has good lubrication; 5, rock bitBionical earthworm type compound sealing structure has automatic compensation function, and by the continuous compression of O type rubber ring, Z-type sealing ring can riseTo good sealing function; 6, the setting of O type rubber ring has reduced the vibration of Z-type sealing ring, has improved the stability of sealing.
Brief description of the drawings
Fig. 1 is the bionical earthworm type of a kind of rock bit of the present invention compound sealing structure figure.
Fig. 2 is the enlarged drawing of Figure 1A place structure.
In figure: 1. tooth pawl, 2. gear wheel, 3. steel ball, 4. plug pin, 5. bearing, 6.Z RunddichtringO, 7.O type rubber ring.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1: tooth pawl 1 and gear wheel 2 are connected on bearing 5 by gear wheel inner hole sleeve respectively, and steel ball 3 is put into axle from plug pin holeAfter holding, plug pin 4 is welded and fixed, by steel ball 3, gear wheel 2 is remained on bearing 5. Dress between gear wheel 2 endoporus and bearing 5There are Z-type sealing ring 6, pair of O type rubber ring 7.
As shown in Figure 2: the bionical earthworm type of a kind of rock bit of the present invention compound sealing structure, by gear wheel 2, bearing 5, Z-type sealing ring6, pair of O type rubber ring 7 forms, and is positioned at the annular seal space that gear wheel 2 and bearing 5 form; Described Z-type sealing ring 6 is mainSealing, mainly plays radial multi-stage sealing function, at Z-type sealing ring 6 and bearing 5, Z-type sealing ring 6 and gear wheel 2 radiallyProjection and the groove of the uniform bionical earthworm type in contact position, the structure of projection and groove is circular arc, has effectively reduced Z-type sealing ring6 contact area, has reduced frictional force and frictional heat; The multiple bionical earthworm type bulge-structure of Z-type sealing ring 6 can be realized multistageSealing, has improved the reliability of sealing; Can storing lubricating grease in the groove of Z-type sealing ring 6, there is good greasy property;Described pair of O type rubber ring 7 is auxiliary seal, lays respectively at Z-type sealing ring 6 and gear wheel 2, Z-type sealing ring 6 and bearing5 axial contact position, mainly plays axial seal, provides close by the boil down to Z-type sealing ring 6 of O type rubber ring 7Feng Li, makes Z-type sealing ring 6 and bearing 5, Z-type sealing ring 6 fit tightly with gear wheel 2, makes Z-type sealing ring 6 betterPlay sealing function; The setting of O type rubber ring 7 has reduced the vibration of Z-type sealing ring 6, has improved the stability of sealing.
Claims (3)
1. the bionical earthworm type of a rock bit compound sealing structure, by gear wheel (2), bearing (5), Z-type sealing ring (6), pair of OType rubber ring (7) composition, is positioned at the annular seal space that gear wheel (2) and bearing (5) form.
2. the bionical earthworm type of a kind of rock bit compound sealing structure as claimed in claim 1, is characterized in that: Z-type sealing ring (6)For primary seal, play radial multi-stage sealing function, at Z-type sealing ring (6) and bearing (5), Z-type sealing ring (6) and gear wheel(2) projection and the groove of the uniform bionical earthworm type in radially contact position, the structure of projection and groove is circular arc.
3. the bionical earthworm type of a kind of rock bit compound sealing structure as claimed in claim 1, is characterized in that: described pair of O type rubberCushion rubber (7) is auxiliary seal, plays axial seal effect, lays respectively at Z-type sealing ring (6) and gear wheel (2), Z-type sealingThe axial contact position of circle (6) and bearing (5), provides close by the boil down to Z-type sealing ring (6) of O type rubber ring (7)Feng Li, has distortion automatic compensation function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008497.0A CN105604486A (en) | 2016-01-08 | 2016-01-08 | Bionic earthworm type composite sealing structure of roller cone bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008497.0A CN105604486A (en) | 2016-01-08 | 2016-01-08 | Bionic earthworm type composite sealing structure of roller cone bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105604486A true CN105604486A (en) | 2016-05-25 |
Family
ID=55984772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610008497.0A Pending CN105604486A (en) | 2016-01-08 | 2016-01-08 | Bionic earthworm type composite sealing structure of roller cone bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105604486A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927156A (en) * | 2016-06-30 | 2016-09-07 | 天津立林钻头有限公司 | Novel bearing sealing ring of roller bit and roller bit thereof |
| CN113326578A (en) * | 2021-05-08 | 2021-08-31 | 中国石油大学(华东) | Bionic nozzle structure design method based on curved surface optimization method |
| CN114320163A (en) * | 2022-03-14 | 2022-04-12 | 西南石油大学 | Sealing element for roller bit and roller bit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838365A (en) * | 1988-04-25 | 1989-06-13 | Reed Tool Company | Seal assembly for rotary drill bits |
| CN2522602Y (en) * | 2001-12-25 | 2002-11-27 | 天津市渤海石油机械有限公司 | Wave double-end surface elastic metal sealing ring of roller bit |
| CN201297132Y (en) * | 2008-12-05 | 2009-08-26 | 西南石油大学 | A novel sealing system of high speed roller bit bearing |
| WO2010068729A2 (en) * | 2008-12-12 | 2010-06-17 | Baker Hughes Incorporated | Bearing seal with improved contact width |
| CN102661123A (en) * | 2012-05-03 | 2012-09-12 | 西南石油大学 | High-temperature resistant floating sealing device for cone bit |
-
2016
- 2016-01-08 CN CN201610008497.0A patent/CN105604486A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838365A (en) * | 1988-04-25 | 1989-06-13 | Reed Tool Company | Seal assembly for rotary drill bits |
| CN2522602Y (en) * | 2001-12-25 | 2002-11-27 | 天津市渤海石油机械有限公司 | Wave double-end surface elastic metal sealing ring of roller bit |
| CN201297132Y (en) * | 2008-12-05 | 2009-08-26 | 西南石油大学 | A novel sealing system of high speed roller bit bearing |
| WO2010068729A2 (en) * | 2008-12-12 | 2010-06-17 | Baker Hughes Incorporated | Bearing seal with improved contact width |
| CN102661123A (en) * | 2012-05-03 | 2012-09-12 | 西南石油大学 | High-temperature resistant floating sealing device for cone bit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927156A (en) * | 2016-06-30 | 2016-09-07 | 天津立林钻头有限公司 | Novel bearing sealing ring of roller bit and roller bit thereof |
| CN113326578A (en) * | 2021-05-08 | 2021-08-31 | 中国石油大学(华东) | Bionic nozzle structure design method based on curved surface optimization method |
| CN113326578B (en) * | 2021-05-08 | 2022-10-25 | 中国石油大学(华东) | Bionic nozzle structure design method based on curved surface optimization method |
| CN114320163A (en) * | 2022-03-14 | 2022-04-12 | 西南石油大学 | Sealing element for roller bit and roller bit |
| CN114320163B (en) * | 2022-03-14 | 2022-05-10 | 西南石油大学 | Sealing element for roller bit and roller bit |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20160525 |