CN202990932U - Static sealing element - Google Patents
Static sealing element Download PDFInfo
- Publication number
- CN202990932U CN202990932U CN 201220710276 CN201220710276U CN202990932U CN 202990932 U CN202990932 U CN 202990932U CN 201220710276 CN201220710276 CN 201220710276 CN 201220710276 U CN201220710276 U CN 201220710276U CN 202990932 U CN202990932 U CN 202990932U
- Authority
- CN
- China
- Prior art keywords
- sealing element
- seal
- sealing
- static
- static sealing
- 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 a static sealing element. The static sealing element is characterized in that a main body of the static sealing element comprises a cylindrical spiral ring, brush hair is radially distributed around the inner wall of the spiral ring, and a spiral sealing surface is formed. The length of the brush hair is equal and is shorter than one half diameter of the spiral ring, and the spiral ring has at least two turns. The static sealing element can be used for sealing any radial rotating and expansion rod, and is particularly applicable to coal drilling, so that coal drilling efficiency can be improved, strong safety protection is provided and safe coal drilling can be guaranteed.
Description
Technical field
The present invention relates to seal, especially be applied in the coal drilling, be used for the static sealing structure that seals between drilling rod and collector.
Background technology
Adopting hydraulic mining for thin soft seam is a kind of economical and practical and safe and reliable digging means, but after hydraulic fracturing, a large amount of coals, water, gas will concentrate its follow-up coal of gushing out, water, gas to separate by holing, conclusion is transported and safety guarantee becomes needs to be resolved hurrily.The present domestic specific aim device that there is no related fields, especially at the drilling rod seal aspect, this runs into technical bottleneck with regard to the hydraulic mining that makes the thin soft seam in colliery.Boring about collector in existing apparatus is connected hermetically-sealed construction hard sealing, soft seal or the synchronous rotary Sealing Technologies of adopting more with drilling rod, above three kinds of sealing means all exist familiar lacunas, can cause drilling rod and seal friction strongly to make the easy loss of seal as hard sealing, gas and dust in use occur and leak; Soft seal reliability when running into high pressure conditions is relatively poor; The synchronous rotary Sealing Technology may produce high heat or the production of spark serious threat downhole safety in synchronous rotary.
Summary of the invention
The present invention provides a kind of static sealing structure for fear of the weak point that prior art exists, and this structure can provide stronger safeguard protection, guarantees that the safety of coal seam drilling is carried out.
The technical scheme that technical solution problem of the present invention adopts is:
A kind of static seal, its design feature is, the main body of described static seal is made of a cylindrical screw ring, and the internal perisporium of described helical ring radially is covered with the sealing surface that is formed by bristle, and described bristle lengths all equates and be shorter than 1/2nd internal diameters of cylindrical screw ring.
The number of rings of the helical ring of described static seal is at least 2 rings.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Static sealing structure of the present invention can be used for the sealing of any axial-rotation and expansion link, especially is applied in the coal drilling, can not only improve the coal seam and adopt drilling efficient, and stronger safeguard protection can be provided, and guarantees that the safety of coal seam drilling is carried out.Wherein static seal is soft brush seal circle, seal with the drilling rod contact by the fire-retardant nylon bristle, can play sealing function under normal pressure, owing to adopting the soft material sealing to reduce with the friction of drilling rod and facilitated the installation of drill bit and the normal stretching motion of drilling rod; Static seal can be realized high quality seal and can not affect drilling rod work.
Description of drawings
Fig. 1 is the structural representation of the static combination seal structure applications of the present invention in collector.
Fig. 2 is static seal structural representation of the present invention.
Number in the figure: 1 guard aperture pipe; 2 gas exhaust mouths; 3 static seals; 31 helical rings; 32 bristles; 4 dynamic sealings; 5 drilling rods; 6 coal water delivery ports; 7 flanges.
Below pass through the specific embodiment, by reference to the accompanying drawings, the specific embodiment that the invention will be further described.
The specific embodiment
As shown in Figure 1, collector is connected to the tail end of guard aperture pipe 1, and collector is provided with gas exhaust mouth 2, coal, gas delivery port 6 and the boring that axially arranges corresponding to the guard aperture pipe, and drill hole is provided with static seal 3 and dynamic sealing 4 from inside to outside successively.
As shown in Figure 2, the main body of static seal 3 is made of a cylindrical screw ring 31, the internal perisporium of helical ring radially is covered with the sealing surface that is formed by bristle 32, and bristle lengths all equates and be shorter than 1/2nd internal diameters (specifically directly determining according to the required drilling rod that passes) of cylindrical screw ring; The periphery wall of the head of bristle and drilling rod 5 is fitted, and forms just sealing.
Be provided with simultaneously the dynamic sealing that coordinates with static seal in the present embodiment, dynamic sealing 4 by a plurality of sizes identical arrange side by side joint ring form, each joint ring and drill hole inner wall, drilling rod periphery wall gap dynamic fit.
During concrete enforcement, the static seal helical ring adopts metal material (as materials such as steel, iron, copper), bristle adopts nylon 66 materials add fire retardant, and the number of rings of static seal helical ring is at least two rings (spiral 360 ° be a ring), and the axial minimum length of helical ring is 40-50mm; The joint ring of dynamic sealing adopts PPESK alloy modification nylon (commercially available prod), and the thickness of each joint ring of dynamic sealing is 2.5-4 mm, and the quantity of joint ring is 12-15.
In order to improve airtight quality, increase the service life, also be provided with copper sheathing between boring and sound attitude hermetically-sealed construction, copper sheathing is with the drill hole inner wall interference fit or be threaded, copper sheathing and static seal interference fit, copper sheathing and dynamic sealing gap dynamic fit.
Below by a concrete embodiment that uses, technical solution of the present invention is described further.
At first package unit connects with flange by guard aperture pipe, collector and sound attitude seal, then drilling rod and drill bit is passed from its centre; Again the guard aperture pipe is fixed on the jewel hole place, simultaneously gas exhaust pipe and coal water carrier pipe is connected to gas exhaust mouth and coal water delivery port; Start at last rig work.In work, the coal of drilling rod drilling, water, gas carry out initial gross separation in collection, in the collector drill hole, drilling rod seals by static seal and dynamic sealing successively, at drilling rod in the drilling rotary course, static seal forms contact by nylon brush hair and drilling rod periphery wall and fits, be that under the condition of lower negative pressure, static seal is kept the sealing of normality when collector.Dynamic flat seal, automatic emergency sealing when being adapted to " spray orifice " generation.In case malleation or high pressure conditions appear suddenly in collector tank, 10-15 the flat seal sheet that " Ho La hoop " formula of dynamic flat seal group is arranged, automatically stack to the tapping of boring outer end sealing flange 7, is realized emergency sealing immediately, and does not affect and creep into operation.When the hole keeper cavity forwards atmospheric pressure state to, dynamically the flat seal group is recovered " free waiting state " automatically.The liberty state is the unordered and then drilling rod rotation of finger tip diaphragm seal, and the position of each end diaphragm seal, state are random unordered.
Claims (2)
1. static seal, it is characterized in that, the main body of described static seal is made of a cylindrical screw ring, and the internal perisporium of described helical ring radially is covered with bristle and forms helixseal face, and described bristle lengths all equates and be shorter than 1/2nd internal diameters of helical ring.
2. a kind of static seal according to claim 1, is characterized in that, the number of rings of described helical ring is at least 2 rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710276 CN202990932U (en) | 2012-12-20 | 2012-12-20 | Static sealing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710276 CN202990932U (en) | 2012-12-20 | 2012-12-20 | Static sealing element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202990932U true CN202990932U (en) | 2013-06-12 |
Family
ID=48562123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220710276 Expired - Fee Related CN202990932U (en) | 2012-12-20 | 2012-12-20 | Static sealing element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202990932U (en) |
-
2012
- 2012-12-20 CN CN 201220710276 patent/CN202990932U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103556944A (en) | Double-layer internal deslagging and anti-blocking drilling tool for soft and outburst coal seam drilling, and use method of drilling tool | |
| CN102996088B (en) | A kind of collector being provided with sound state combination seal structure | |
| CN202380985U (en) | Tubular air seal thread joint | |
| CN202946057U (en) | Collector with movable and static combination sealing structure | |
| CN105064946B (en) | Hole packer and its boring and coring process | |
| CN203716841U (en) | Double-layer internal slag discharging and plugging prevention drilling tool for soft outburst coal seam drilling | |
| CN204082060U (en) | A kind of monolithic coiled tubing speed tubing string hanger | |
| CN202990932U (en) | Static sealing element | |
| CN202971914U (en) | Dynamic and static combined sealing structure | |
| CN202788637U (en) | Drill pipe water supplying device | |
| CN203097803U (en) | High sulfur resistant high pressure metal sealing casing pipe head | |
| CN205477414U (en) | Double helix of nai pressurization threaded connection formula drilling rod | |
| CN201334868Y (en) | Side water injection mechanism for hydraulic rock drill | |
| CN205175610U (en) | Erection joint of LNG line pressure sensor | |
| CN204782834U (en) | Novel continuous outside of tubes slips connector | |
| CN207863885U (en) | Hammer formula surface conductor pipe nipple | |
| CN202117577U (en) | Internal slip type connector for continuous tube | |
| CN112627762A (en) | Large-drift-diameter gas extraction drilling hole sealing device | |
| CN112483011A (en) | Plug-in type underground flexible continuous composite pipe connecting joint and connecting method | |
| CN204252836U (en) | Liquid injecting type down-the-hold drill bit | |
| CN205135579U (en) | Locking resistance-reducing centralizer for horizontal well casing type composite perforation | |
| CN201568015U (en) | Micro-ring gap interporosity flow blocker | |
| CN205858172U (en) | Rig revolution wind sector | |
| CN204754893U (en) | Compound perforation rifle | |
| CN204040927U (en) | Water filling deslagging gas drainage drill stem |
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: 20130612 Termination date: 20161220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |