CN202850863U - Tricone bit oil-storage and compensatory pressure-balance system - Google Patents
Tricone bit oil-storage and compensatory pressure-balance system Download PDFInfo
- Publication number
- CN202850863U CN202850863U CN201220542153.5U CN201220542153U CN202850863U CN 202850863 U CN202850863 U CN 202850863U CN 201220542153 U CN201220542153 U CN 201220542153U CN 202850863 U CN202850863 U CN 202850863U
- Authority
- CN
- China
- Prior art keywords
- oil
- oil storage
- storage bag
- pressure
- storage
- 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
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to technical field of manufacturing roller bits in petroleum drilling, in particular to a tricone bit oil-storage and compensatory pressure-balance system. The tricone bit oil-storage and pressure-balance system comprises a tooth palm hole formed on the tooth palm, an oil storage bag is arranged inside the tooth palm oil hole, and a pin hole is arranged at the bottom of the oil storage bag. The tricone bit oil-storage and compensatory pressure-balance system is characterized in that the pin hole is staggered with a pressure-transmitting hole arranged on the tooth palm. The tricone bit oil-storage and compensatory pressure-balance system is simple in structure. When the tricone bit oil-storage and compensatory pressure-balance system works, through staggering the pressure-transmission hole and the bottom of the oil storage bag, slurry with gravels and rock debris first impacts a pressing cover or disc-shaped springs rather than directly impacts the oil storage bag, and therefore service life of the oil storage bag is prolonged, service life of the roller bits is integrally improved. The tricone bit oil-storage and compensatory pressure-balance system simplifies the structure of the tooth palm oil hole, and facilitates processing and improving surface roughness of the oil hole after being designed to a hollow pillar shape.
Description
Technical field
The utility model relates to the rock bit manufacturing technology field in the oil drilling, relates in particular to a kind of tricone bit oil storage compensation pressure balancing system.
Background technology
To the analysis showed that tricone bit lost efficacy, the damage of bearing is the principal mode that rock bit is destroyed.Studies show that further the source of damage of bearing mainly contains: the resistance to wearing of bearing itself, bite-resistant and anti-overheated ability are low, make the bearing earlier period damage in operation process; The tight storage bucking-out system lost efficacy, and the lubricating condition of bearing is destroyed, and bearing is worked in the abrasive particle medium, thereby causes the bearing early damage; Improper use, actual operation parameter have surpassed the scope that the design bearing ability allows.Therefore, improve the application life of drill bit, except improving the resistance to wearing of bit bearing, bite-resistant and anti-overheated ability and correct the use, sealing and the application life that also will improve the tight storage bucking-out system.
As everyone knows, the sealing of present three gear wheel sealed journal bearing drill bits, the mostly rubber seal of employing " 0 " type rubber seal or " D " type (rectangle section).In order to deal with the high pressure that is formed in the shaft bottom by drilling fluid, generally be designed with an oil storage compensating device at the bit leg back, its task is to guarantee that sealing ring has good condition of work, thereby improves the life-span of sealing ring.Bearing lubrication space between oil storage compensating device and the palm of roller bits has connected to form the tight storage bucking-out system by passage.From and guarantee that bearing has good lubricating condition, improve the application life of bit bearing.Conventional oil storage compensation pressure balancing system is made of bit leg oilhole and long oil hole and the pressure transmission hole installed on a plurality of parts such as oil storage bag in it, oil storage cup, gland, back-up ring, sealing ring, butterfly spring and the bit leg usually.Whole oil storage bag is made by rubber, is provided with a small pin hole in the bottom centre of oil storage bag. can communicate with the external world.During work, when oil storage bag is subject to larger ambient pressure effect and when concaving, pin hole is because the elastic reaction of rubber is in blocking; When ambient pressure less than oil storage hole in during the lubricating grease precompression, oil storage bag is to the oil storage hole outer lug, pin hole is in open state, grease overflows from pin hole, plays the pressure release effect, thus the balance inside and outside differential pressure.Extraneous operating pressure passes to oil storage bag by pressure transmission hole, and by distortion and the pressure release of oil storage bag, adjusting and balance roller axle hold inside and outside pressure reduction, and the assurance bearing sealed ring is worked under less pressure reduction, and bearing lubrication condition further improves.Because the little pin hole of oil storage bag bottom is corresponding with pressure transmission hole, when actual well drilled was worked, mud carries landwaste secretly and silt directly impacts oil storage bag by pressure transmission hole, causes the too early damage of oil storage bag, has reduced the whole service life of rock bit; In addition, because there is ladder platform structure in the bit leg oilhole of existing structure, the processing more complicated.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned technology, and a kind of tricone bit oil storage compensation pressure balancing system is provided, and avoids landwaste and silt directly to impact oil storage bag, thereby improves the application life of rock bit.
The utility model for achieving the above object, by the following technical solutions: a kind of tricone bit oil storage compensation pressure balancing system, comprise the bit leg oilhole that is opened on the bit leg, be provided with oil storage bag in the bit leg oilhole, the oil storage bag bottom is provided with pin hole, and described pin hole is staggered with the pressure transmission hole that is arranged on the bit leg.
Described oil storage bag outside is provided with lower cover, and described lower cover is threaded with the upper press cover that is arranged on oil storage bag top.
The bottom of described lower cover and bit leg oilhole is equipped with disk spring.
Described bit leg oilhole is hollow cylinder.
The beneficial effects of the utility model are: the utility model is simple in structure, stagger by the pin hole with pressure transmission hole and oil storage bag bottom, during work, contain the mud of gravel and landwaste by impacting first lower cover or disk spring rather than directly impacting oil storage bag, thereby improved the application life of oil storage bag, improved on the whole the application life of rock bit.Simplified the structure of bit leg oilhole, directly be designed to hollow cylinder, be beneficial to processing and improve the oilhole surface roughness; The oil sac baseplane can better be protected in lower cover baseplane after the optimised shape; Upper lower cover spiral marking connection, and when assembling smear thread locking adhesive, system architecture forms a firm integral body, good integrity after sealing effectiveness and the assembling; The structure of relatively existing oil storage system, novel oil storage system structural entity height has reduced about 15%.The space of saving can be used for increasing oil mass or being used for protecting jump ring.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of prior art.
The specific embodiment
Describe the specific embodiment of the present utility model in detail below in conjunction with accompanying drawing and preferred embodiment.As shown in Figure 1, a kind of tricone bit oil storage compensation pressure balancing system comprises the bit leg oilhole 10 that is opened on the bit leg 1, is provided with oil storage bag 4 in the bit leg oilhole, and the oil storage bag bottom is provided with pin hole 41, and described pin hole is staggered with the pressure transmission hole 11 that is arranged on the bit leg.The bit leg oilhole provides and compensates lubricating grease by the internal communication of a passage and gear wheel 2.During work, when oil storage bag is subject to larger ambient pressure effect and when concaving, pin hole is because the elastic reaction of rubber is in blocking; When ambient pressure less than oil storage hole in during the lubricating grease precompression, oil storage bag is to the oil storage hole outer lug, pin hole is in open state, grease overflows from pin hole, plays the pressure release effect, thus the balance inside and outside differential pressure.Extraneous operating pressure passes to oil storage bag by pressure transmission hole, and by distortion and the pressure release of oil storage bag, adjusting and balance roller axle hold inside and outside pressure reduction, and the assurance bearing sealed ring is worked under less pressure reduction, and bearing lubrication condition further improves.
Described oil storage bag outside is provided with lower cover 3, and described lower cover is threaded with the upper press cover 5 that is arranged on oil storage bag top.For the sealing of strengthening system, a sealing ring 6 and back-up ring 7 are set also between upper press cover and bit leg.The middle part of upper press cover has oil filler point and plug 8 is installed.The ring week of upper press cover is provided with fluid hole, is used for lubricating grease and flows into gear wheel.
Rock in order to make not produce between lower cover and the bit leg oilhole, the bottom of described lower cover and bit leg oilhole is equipped with disk spring 9.
Preferably, for the ease of processing bit leg oilhole, described bit leg oilhole is hollow cylinder.The sealing integral body that is formed by upper press cover and lower cover also is cylindrical, is convenient to put into the bit leg oilhole.
The utility model is simple in structure, stagger by the pin hole with pressure transmission hole and oil storage bag bottom, during work, contain the mud of gravel and landwaste by impacting first lower cover or disk spring rather than directly impacting oil storage bag, thereby improved the application life of oil storage bag, improved on the whole the application life of rock bit.Simplified the structure of bit leg oilhole, directly be designed to hollow cylinder, be beneficial to processing and improve the oilhole surface roughness; The oil sac baseplane can better be protected in lower cover baseplane after the optimised shape; Upper lower cover spiral marking connection, and when assembling smear thread locking adhesive, system architecture forms a firm integral body, good integrity after sealing effectiveness and the assembling; The structure of relatively existing oil storage system, novel oil storage system structural entity height has reduced about 15%.The space of saving can be used for increasing oil mass or being used for protecting jump ring.
The above only is preferred embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a tricone bit oil storage compensation pressure balancing system comprises the bit leg oilhole that is opened on the bit leg, is provided with oil storage bag in the bit leg oilhole, and the oil storage bag bottom is provided with pin hole, it is characterized in that: described pin hole is staggered with the pressure transmission hole that is arranged on the bit leg.
2. tricone bit oil storage compensation pressure balancing system according to claim 1, it is characterized in that: described oil storage bag outside is provided with lower cover, and described lower cover is threaded with the upper press cover that is arranged on oil storage bag top.
3. tricone bit oil storage compensation pressure balancing system according to claim 1, it is characterized in that: the bottom of described lower cover and bit leg oilhole is equipped with disk spring.
4. according to claim 2 or the 3 tricone bit oil storage compensation pressure balancing systems of stating, it is characterized in that: described bit leg oilhole is hollow cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220542153.5U CN202850863U (en) | 2012-10-22 | 2012-10-22 | Tricone bit oil-storage and compensatory pressure-balance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220542153.5U CN202850863U (en) | 2012-10-22 | 2012-10-22 | Tricone bit oil-storage and compensatory pressure-balance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202850863U true CN202850863U (en) | 2013-04-03 |
Family
ID=47982074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220542153.5U Expired - Fee Related CN202850863U (en) | 2012-10-22 | 2012-10-22 | Tricone bit oil-storage and compensatory pressure-balance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202850863U (en) |
-
2012
- 2012-10-22 CN CN201220542153.5U patent/CN202850863U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103233682B (en) | The rock bit lubricating system of Micro-positive pressure auto-compensation | |
| CN102877790A (en) | Tricone bit oil storage compensation pressure balancing system | |
| CN104948114B (en) | A kind of sealing ring with lubrication channel | |
| CN201080787Y (en) | Rolling sealing three teeth roller bit | |
| CN202850863U (en) | Tricone bit oil-storage and compensatory pressure-balance system | |
| CN101086197A (en) | Bearing metal sealing structure for rock bit | |
| CN206917613U (en) | A kind of portable drill drill rod centering device | |
| CN103132926B (en) | Hollow universal joint for rotary steerable drilling | |
| CN101881136A (en) | Compound seal roller bit | |
| CN207673285U (en) | Sealing tricone bit with pressure oil storage compensating device | |
| CN203175401U (en) | Micro-positive pressure automatic compensating roller bit lubricating system | |
| CN201581810U (en) | Sealed roller cone drill bit with pressure balancing device | |
| CN2906030Y (en) | Mechanical sealing device for small-sized roller bit which is no more than 6'' | |
| CN201714301U (en) | Compound seal roller bit | |
| CN205743715U (en) | Novel roller bit bearing sealed ring and rifler thereof | |
| CN2558752Y (en) | Tricone bit | |
| CN103470188B (en) | Double containment rifler with seal pressure adjusting means | |
| CN203515327U (en) | Double-sealing roller bit with sealing pressure adjusting device | |
| CN201715010U (en) | Flat gate valve with anti-lock structure | |
| CN208347692U (en) | Rock bit pressure oil storage compensating device and its rock bit | |
| CN204152442U (en) | Fluid power Anti-impact screw drill | |
| CN2276985Y (en) | Pressure balance sealed bearing tri-cone rotary drill bit | |
| CN209653972U (en) | A kind of rock bit being able to achieve sealing non-tight conversion | |
| CN206830053U (en) | The three ratchet wheel drill bits with superpower compactness | |
| CN200939510Y (en) | Disk body of chuck |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20211022 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |