CN207122292U - A kind of well mouth seal structure for large diameter drilling - Google Patents
A kind of well mouth seal structure for large diameter drilling Download PDFInfo
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- CN207122292U CN207122292U CN201721097951.0U CN201721097951U CN207122292U CN 207122292 U CN207122292 U CN 207122292U CN 201721097951 U CN201721097951 U CN 201721097951U CN 207122292 U CN207122292 U CN 207122292U
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- drilling
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Abstract
The utility model discloses a kind of well mouth seal structure for large diameter drilling, outer tube including being arranged in inwall at well head, wellhead flange is equipped with the top of outer tube, the wellhead flange includes being bolted upper flange plate and lower flange together, inner sleeve is fixed with wellhead flange intermediate coaxial, it is close to inner sleeve between upper flange plate and lower flange and is referred to as first order sealing provided with seal washer, sealing short tube is threaded with interior cannula tip, secondary seal mechanism is connected with by sealing flange on sealing short tube, above sealing tubing string interior sealing plug third level sealing is referred to as provided with drilling rod sealer, it is provided with that landwaste is counter arranges mouth on sealing tubing string below rolling bearing；So as to which two latex sealing blocks are close to force together when left seal member and right seal member close, preferably sealing effectiveness is served on the contact surface.
Description
Technical field
The utility model belongs to pneumatic down-hole hammer drilling applications, more particularly to a kind of wellhead sealing for large diameter drilling
Structure.
Background technology
At present, ground rapid drilling has become a new technology of mine rescue, is got through for mine rescue
One " life channel ", the perfect rescue of especially Chilean mine disaster and the mine disaster of China Pingyi, it was demonstrated that the technology is quick, effect
Significantly.But the step for getting through simply mine rescue key of " life channel ", to rescue trapped personnel, it is also necessary to
" passway for escaping " is major diameter well（Hole diameter is not less than φ 650mm）Foundation.At present, the main technique of " passway for escaping " is just to follow
Ring pneumatic down-hole hammer drilling technology and reacting cycle pneumatic down-hole hammer drilling technology.
Both technologies is required for injecting pressure-air from ground by air compressor machine, so as to discharge well by shaft bottom landwaste is counter
Outside, air speed is needed to be at least up to 15m/s when being arranged because landwaste is counter, thus in drilling process, the anti-gas velocity that empties of well head is fast, mesh
Preceding wellhead sealing can't reach good sealing effectiveness, and the numerous and diverse drilling progress of operating process is slow, while to the body of worker
Health has a strong impact on.
The content of the invention
The purpose of the utility model is to propose one kind for the above-mentioned problems of the prior art of solution to be used for major diameter
The well mouth seal structure of drilling well, adopted the technical scheme that to reach above-mentioned purpose：
A kind of well mouth seal structure for large diameter drilling, including the outer tube of inwall at well head is arranged in, it is outside
Wellhead flange is equipped with the top of sleeve pipe, the wellhead flange includes being bolted upper flange plate and lower flange together
Disk, inner sleeve is fixed with wellhead flange intermediate coaxial, and inner sleeve is close between upper flange plate and lower flange and is provided with sealing
Packing ring is referred to as first order sealing, and sealing short tube is threaded with interior cannula tip, passes through Sealing Method on sealing short tube
Orchid is connected with secondary seal mechanism, and the secondary seal mechanism includes sealing tubing string, is fixed with sealing tubing string for supporting
The rolling bearing of drilling rod, the perforation being used for through drilling rod is provided with the inner ring of rolling bearing, will equipped with seal rubber plug in perforation
It is referred to as second level sealing, and third level sealing is referred to as provided with drilling rod sealer above sealing tubing string interior sealing plug,
Sealing tubing string below rolling bearing is provided with that landwaste is counter to arrange mouth.
Preferably, the drilling rod sealer includes the left seal member of equal semicircular in shape housing and right seal member, Zuo Mi
One end of envelope part and right seal member is hinged, and the other end is bolted to connection and forms a circular configuration；Left sealing
Part is identical with right seal member structure, and the left seal member is enclosed and formed by upper half plectane, lower half plectane, arc side plate
The semicircular shell with opening surface, be embedded with semicircular latex sealing block in left seal member, the latex sealing
The shape of block matches with semicircular shell shape, the first semicircular indentations is provided with the circle centre position of latex sealing block, in upper half
The rectangular indentation circumscribed with the first semicircular indentations, the first semicircular indentations diameter etc. are equipped with plectane and lower half plectane
In the long edge lengths of rectangular indentation；The rectangular indentation of left seal member and the rectangular indentation of right seal member surround one and are used to fix
The square breach of square kelly.
Preferably, the planar section of latex sealing block protrudes the opening surface of left seal member.
Preferably, multiple perforation are provided with upper half plectane and lower half plectane, are furnished with perforation close for fixing latex
Seal the screw of block.
Preferably, the first sealing lacquer disk(-sc) and the second sealing lacquer disk(-sc), first fluid sealant are integrally formed with seal rubber plug
Disk is held for sealed rotation shaft, and the second sealing lacquer disk(-sc) is close to the bottom surface of drilling rod sealer.
Preferably, it is provided with seal pipe top end and is used to covering the end cap of drilling rod sealer, end cap includes the first half domes
With the second half domes, the first half domes and the second half dome one end are hinged, and the other end is bolted to connection and forms one
Round end cap, it is equipped with the second semicircular indentations at the center of the first end cap and the second end cap and encloses a circumferential notch,
Circumferential notch is used for through drilling rod.
Preferably, it is provided with casing elevator in interior cannula tip.
Had the beneficial effect that possessed by the utility model：（1）The setting sealed by the first order prevents few in import
The anti-row of landwaste or compressed gas；（2）The setting of second level sealing placed landwaste when discharging that landwaste is counter to be arranged mouthful along drill with ferrule
Bar sprays and influences job site；（3）Need constantly to add new sleeve pipe during drilling well, this requires drilling rod to seal
Device can be rapidly assembled and disassembled without influenceing drilling progress, reached above-mentioned quick using left seal member and right seal member
The requirement of installation and removal；（4）Latex sealing block inside left seal member and right seal member serves further to drilling rod
Sealing, has reached better seal effect；Latex sealing block while seal request is reached, is also reduced using circumferential notch
Cost of manufacture；（5）The planar section of latex sealing block protrudes the opening surface of left seal member, so as to close in left seal member and the right side
Two latex sealing blocks are close to force together when sealing members close, serve preferably sealing effectiveness on the contact surface；（6）Upper
The screw that semi-circular plate and lower half plectane are provided with prevents latex sealing block to be moved in left seal member and right seal member
The generation of dynamic inconsistent phenomenon.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of drilling rod sealer；
Fig. 3 is the structural representation of left seal member；
Fig. 4 is Fig. 3 right view；
Fig. 5 is the structural representation of end cap.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of well mouth seal structure for large diameter drilling, including it is arranged in the overcoat of inwall at well head
Pipe 15, wellhead flange is equipped with the top of outer tube 15, and the wellhead flange includes being bolted upper method together
Blue disk 13 and lower flange 14, inner sleeve 16 is fixed with wellhead flange intermediate coaxial, and Casing elevator is provided with the top of inner sleeve 61
Card 2, falls to prevent anti-avulsion when adding sleeve pipe, inner sleeve 16 is close between upper flange plate 13 and lower flange 14 and is provided with sealing gasket
Circle 1 is referred to as first order sealing, and sealing short tube 12 is threaded with the top of inner sleeve 16, by close on sealing short tube 12
Envelope flange 3 is connected with secondary seal mechanism, and the secondary seal mechanism includes sealing tubing string 5, and use is fixed with sealing tubing string 5
In the rolling bearing 10 of supports drill rods 17, the perforation being used for through drilling rod 17 is provided with the inner ring 4 of rolling bearing 10, in perforation
Second level sealing is referred to as equipped with seal rubber plug 38, drilling rod sealer 6 is provided with above the sealing interior sealing plug 38 of tubing string 5 will
It is referred to as third level sealing, is provided with that landwaste is counter to arrange mouth 11 on the sealing tubing string 5 below rolling bearing 10.
As shown in Figure 2, Figure 3 and Figure 4, the drilling rod sealer 6 includes the He of left seal member 27 of equal semicircular in shape housing
Right seal member 22, one end of left seal member 27 and right seal member 22 are hinged, and are such as welded in one end of left seal member 27
There is the first articulated elements 25, the second articulated elements 23 is welded with one end of right seal member 22, the first articulated elements 25 and second is be hinged
Part 23 is be hinged by bearing pin 24, and the other end is fixedly connected by bolt 19 to form a circular configuration, in left seal member 27
With the nut 18 for fixing bolt 19 is welded with right seal member 22；Left seal member 27 and the structure phase of right seal member 22
Together, the left seal member 27 is that have opening surface by what upper half plectane 31, lower half plectane 32, arc side plate 30 enclosed
Semicircular shell, semicircular latex sealing block 21, the shape of the latex sealing block 21 are embedded with left seal member 27
Match with semicircular shell shape, the first semicircular indentations 20 are provided with the circle centre position of latex sealing block 21, in upper half plectane
31 and lower half plectane 32 on be equipped with the rectangular indentation 26 circumscribed with the first semicircular indentations 20, first semicircular indentations 20
Diameter is equal to 26 long edge lengths of rectangular indentation；The rectangular indentation 26 of left seal member 27 and the rectangular indentation of right seal member 22 are enclosed
The square breach for being used to fix square kelly 17 into one.
After left seal member 27 and right seal member 22 close, in order to prevent from producing larger gap at contact surface
Sealing effectiveness is influenceed, the planar section 29 of latex sealing block 21 protrudes the opening surface of left seal member 27.
In use, in order to prevent latex sealing block 21 from being moved in left seal member 27 and right seal member 22
Dynamic dislocation, is provided with multiple perforation on upper half plectane 31 and lower half plectane 32, is furnished with perforation and is used to fix latex sealing block
21 screw 28.
The first sealing lacquer disk(-sc) 9 and the second sealing lacquer disk(-sc) 8, the first sealing lacquer disk(-sc) 9 are integrally formed with seal rubber plug 38
10 are held for sealed rotation shaft, the bottom surface that the second sealing lacquer disk(-sc) 8 is close to drilling rod sealer 6 is used for sealing drilling rod sealer 6.
As shown in figure 5, being provided with the end cap 7 for being used for covering drilling rod sealer 6 on sealing tubing string 5 top, end cap 7 includes first
Half dome 34 and the second half domes 36, the first half domes 34 and the second half one end of dome 36 are be hinged by bearing pin 33, and the other end leads to
Cross bolt 35 to be fixedly connected and form a round end cap, the second half are equipped with the center of the first end cap 34 and the second end cap 36
Circumferential notch and enclose a circumferential notch 37, circumferential notch 37 is used for through drilling rod.
The utility model when in use, be put into inner sleeve 16 by seal washer 1 be placed on ring flange 13 and lower flange 14 it
Between groove in, tighten bolt complete the first order sealing；Kelly bar 17 is transferred, secondary seal mechanism is pushed up installed in inner sleeve 16
End, load seal rubber plug 38 in the inner ring 4 of rolling bearing 10 and complete second level sealing；Open the left sealing of drilling rod sealer 6
Part 27 and right seal member 22 are set on kelly bar 17, and finally the dome 34 of closure the first half and the second half domes 36 complete the 3rd
Level sealing.
Compressed air enters pneumatic down-hole hammer out of kelly bar 17, and driving pneumatic down-hole hammer does work, and acts on the brill of front end
On head, at the same rig drive pneumatic down-hole hammer and drill bit revolution and carry out impact rotating detritus drilling, then through kelly bar 17 with
Anti- row's passage between inner sleeve 16 drives landwaste to return to ground by the anti-mouth 11 of arranging of landwaste.When the section inner sleeve of drill bit advance one
During length, open end cap 7 and pull down drilling rod sealer 6 and secondary seal mechanism successively, the new sleeve pipe in lower section, then progressively pacify again
Load onto state three-level sealing, the like until drilling terminate.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement, but these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technology
The spirit and scope of scheme.
Claims (7)
1. a kind of well mouth seal structure for large diameter drilling, including the outer tube of inwall at well head is arranged in, its feature exists
In being equipped with wellhead flange at the top of outer tube, the wellhead flange includes being bolted upper flange plate together
And lower flange, inner sleeve is fixed with wellhead flange intermediate coaxial, inner sleeve is close between upper flange plate and lower flange
First order sealing is referred to as provided with seal washer, sealing short tube is threaded with interior cannula tip, is led on sealing short tube
Cross sealing flange and be connected with secondary seal mechanism, the secondary seal mechanism includes sealing tubing string, is fixed with sealing tubing string
For the rolling bearing of supports drill rods, the perforation being used for through drilling rod is provided with the inner ring of rolling bearing, equipped with close in perforation
Sealing plug is referred to as second level sealing, and the third level is referred to as provided with drilling rod sealer above sealing tubing string interior sealing plug
Sealing, is provided with that landwaste is counter to arrange mouth on the sealing tubing string below rolling bearing.
2. the well mouth seal structure according to claim 1 for large diameter drilling, it is characterised in that the drilling rod sealing
Device includes one end hinge of the left seal member of equal semicircular in shape housing and right seal member, left seal member and right seal member
Connect, the other end is bolted to connection and forms a circular configuration；Left seal member is identical with right seal member structure, institute
It is the semicircular shell with opening surface enclosed by upper half plectane, lower half plectane, arc side plate to state left seal member,
Semicircular latex sealing block, shape and the semicircular shell shape phase of the latex sealing block are embedded with left seal member
Match somebody with somebody, the first semicircular indentations are provided with the circle centre position of latex sealing block, be equipped with upper half plectane and lower half plectane and first
The circumscribed rectangular indentation of semicircular indentations, the first semicircular indentations diameter are equal to the long edge lengths of rectangular indentation；Left sealing
The rectangular indentation of part and the rectangular indentation of right seal member surround the square breach for being used to fix square kelly.
3. the well mouth seal structure according to claim 2 for large diameter drilling, it is characterised in that latex sealing block
Planar section protrudes the opening surface of left seal member.
4. the well mouth seal structure for large diameter drilling according to Claims 2 or 3, it is characterised in that in upper semi-circle
Plate and lower half plectane are provided with multiple perforation, are furnished with the screw for being used for fixing latex sealing block in perforation.
5. the well mouth seal structure according to claim 1 or 2 for large diameter drilling, it is characterised in that in fluid sealant
The first sealing lacquer disk(-sc) and the second sealing lacquer disk(-sc) are integrally formed with beyond the Great Wall, the first sealing lacquer disk(-sc) is held for sealed rotation shaft, and second
Sealing lacquer disk(-sc) is close to the bottom surface of drilling rod sealer.
6. the well mouth seal structure according to claim 1 or 2 for large diameter drilling, it is characterised in that in seal pipe
Top end, which is provided with, is used to covering the end cap of drilling rod sealer, and end cap includes the first half domes and the second half domes, the first half domes
It is hinged with the second half dome one end, the other end is bolted to connection and forms a round end cap, in the first end cap and
The center of two end caps is equipped with the second semicircular indentations and encloses a circumferential notch, and circumferential notch is used for through drilling rod.
7. the well mouth seal structure according to claim 1 or 2 for large diameter drilling, it is characterised in that in inner sleeve
Top is provided with casing elevator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721097951.0U CN207122292U (en) | 2017-08-30 | 2017-08-30 | A kind of well mouth seal structure for large diameter drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721097951.0U CN207122292U (en) | 2017-08-30 | 2017-08-30 | A kind of well mouth seal structure for large diameter drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207122292U true CN207122292U (en) | 2018-03-20 |
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ID=61611292
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721097951.0U Active CN207122292U (en) | 2017-08-30 | 2017-08-30 | A kind of well mouth seal structure for large diameter drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207122292U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716377A (en) * | 2018-08-15 | 2018-10-30 | 杨福苗 | A kind of gas well device for plugging and gas well drilling equipment |
| CN110566151A (en) * | 2019-09-03 | 2019-12-13 | 辽宁省有色地质一〇一队有限责任公司 | Drill pipe floating sealing device |
-
2017
- 2017-08-30 CN CN201721097951.0U patent/CN207122292U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716377A (en) * | 2018-08-15 | 2018-10-30 | 杨福苗 | A kind of gas well device for plugging and gas well drilling equipment |
| CN108716377B (en) * | 2018-08-15 | 2024-04-16 | 杨福苗 | Gas well plugging device and gas well drilling equipment |
| CN110566151A (en) * | 2019-09-03 | 2019-12-13 | 辽宁省有色地质一〇一队有限责任公司 | Drill pipe floating sealing device |
| CN110566151B (en) * | 2019-09-03 | 2024-05-03 | 辽宁省有色地质一〇一队有限责任公司 | Floating sealing device for drill rod of orifice |
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