CN2878658Y - Drilling/further drilling/back drilling sealing device for high-pressure cryolaccolith layer - Google Patents
Drilling/further drilling/back drilling sealing device for high-pressure cryolaccolith layer Download PDFInfo
- Publication number
- CN2878658Y CN2878658Y CN 200520036123 CN200520036123U CN2878658Y CN 2878658 Y CN2878658 Y CN 2878658Y CN 200520036123 CN200520036123 CN 200520036123 CN 200520036123 U CN200520036123 U CN 200520036123U CN 2878658 Y CN2878658 Y CN 2878658Y
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- CN
- China
- Prior art keywords
- high pressure
- drill
- drilling
- pressure water
- drilling rod
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- 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 - Lifetime
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Abstract
High pressure water rock stratum bore/drill adding/drill withdrawing closure device relates to the engineering mechanical art, especially the drill safe withdrawing art in grouting and boring construction. The device of the utility model can solve such problems as boring safely, drill adding and drill withdrawing. The utility model comprise a front segment orifice pipe and a back segment orifice pipe, a sealing ring is arranged in the front segment orifice pipe, a high pressure valve is connected in series between the front segment orifice pipe and the back segment orifice pipe. The beneficial effects of the utility model are that high pressure water can be sealed while boring, drill addiing and drill rod withdrawal in high pressure water rock strata, with reduced operational difficulty and higher safety factor. High pressure water in rock strata can be prevented efficiently from leaking outside, the drill withdrawing safely problem in the case of high pressure water during boring is solved.
Description
Technical field
The utility model relates to the engineering machinery technology, particularly the technology that is used for moving back safely brill of grouting making hole construction.
Background technology
In the drilled grout hole work progress, when being drilled into permeable layer, because the hydraulic pressure in the rock stratum is high, the safety problem when withdrawing from drilling rod (abbreviation moves back brill) is very serious, prior art is to add sealing ring in the orifice tube sealer, by sealing ring and the drilling rod solution sealing problem that closely cooperates.This method is static, and is out of question during low-pressure (2MPa is following).But drilling rod is to work in sealing ring in revolution of rig process and impact always, also is close-fitting in this process.Because annular gap is little, drill holes is again that each orientation and gradient have, and drilling rod is difficult fully concentric with the aperture sealer, and the drilling rod surface roughness is poor, causes the friction increasing of drilling rod and sealing ring to cause sealing system to damage unavoidably.When moving back brill, owing to need the operator nearby to operate, because sealing is not enough, water under high pressure very easily causes security incident.
The utility model content
Technical problem to be solved in the utility model is, provides a kind of high pressure water rock layer to hole/add and bores/move back the brill locking device, utilizes device of the present utility model, can solve to exist under the situation of water under high pressure, and safety is holed, added brill, moves back the problem of brill.
The technical scheme that the utility model solve the technical problem employing is, high pressure water rock layer holes/adds and bore/move back the brill locking device, comprise leading portion orifice tube and back segment orifice tube, and be provided with sealing ring in the leading portion orifice tube, between leading portion orifice tube and back segment orifice tube, be serially connected with high pressure valve.
Furtherly, in the leading portion orifice tube, also be provided with a pressure seal arrangement.Described pressure seal arrangement is buckling sealing plug or the interior buckling sealing plug of air pressure in the hydraulic pressure.Be connected by flange between described high pressure valve and leading portion orifice tube, the back segment orifice tube.Described pressure seal arrangement is arranged at the place ahead of sealing ring.
This paper is defined as " the place ahead " with the direction of rig, with the direction of drilling tool, or claims the direction of drill bit to be defined as " rear ".
The beneficial effects of the utility model are that sealing water under high pressure in the time of can holing in containing the rock stratum of water under high pressure, add drilling rod and move back drilling rod reduces operation easier and strengthens safety factor.Can effectively stop the outside seepage of water under high pressure in the rock stratum, move back the brill problem in the safety that runs under the situation of water under high pressure when having solved boring.
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the drilling rod force analysis figure under expansible stopper effect of the present utility model.
The specific embodiment
" connection hand " as herein described is the linkage that connects two drilling rods, belongs to general purpose accessory.
Referring to Fig. 1.This paper is abbreviated as " liquid (gas) is pressed interior buckling sealing plug " with " the interior buckling sealing plug of buckling sealing plug or air pressure in the hydraulic pressure ".
Device of the present utility model comprises orifice tube back segment 10, also comprises:
Orifice tube leading portion 20 is provided with sealing ring 1 and pressure seal arrangement in the described orifice tube leading portion 20, and described pressure seal arrangement is a buckling sealing plug 3 in liquid (gas) is pressed;
High pressure valve 4, described high pressure valve 4 one ends are connected with orifice tube leading portion 20 by flange, and the other end is connected with orifice tube back segment 10 by flange.
Be in passive state when expansible stopper 3 was flat in liquid (gas) was pressed, enough big gap is arranged for the drilling rod turnover, main by sealing ring 1 sealing, as the prominent water under high pressure of meeting, stop to creep into, withdraw from drilling rod, as find jetting between drilling rod and the sealing ring 1, when then withdrawing from first connection hand, pressurization makes liquid (gas) press interior expansible stopper 3 to expand, make it and drilling rod locking and sealing, behind following first drilling rod, the propeller screw thread is connected with second, unclamps liquid (gas) and press interior expansible stopper, move back and be drilled into second the heavy-handed multiple above work of connection, all withdraw from the grouting sealing system until drilling tool.After drilling tool withdraws from high pressure valve, can seal the leading portion grouting system by high pressure valve.High pressure valve described in the utility model is also referred to as the high pressure grouting stop-valve.
Especially, the utility model is arranged at pressure seal arrangement at the rear of sealing ring.The effect of She Zhiing is like this, when in the end one section drilling tool withdraws from the high pressure grouting stop-valve, even broken away from sealing ring, can guarantee that still drilling rod is subjected to the effect that liquid (gas) is pressed interior expansible stopper, has guaranteed sealing effectiveness.
Below to the work of each parts as describing separately.
Dash forward when sealing ring 1 is used to hole and seal water under high pressure when meeting water under high pressure.When creeping into work, expansible stopper 3 was in not pressurized state in liquid (gas) was pressed.
Interior expansible stopper forcing pipe 2 is to press (going out) liquid (gas) that advances of interior expansible stopper 3 pressurizations and release to manage to liquid (gas).
The effect of expansible stopper 3 was complete closed water under high pressures and to drilling rod pressurization locking in liquid (gas) was pressed, and made drilling rod be unlikely to penetrate the aperture under the pressure condition in high.Normally creep under the state, expansible stopper was to be in not pressurized state in liquid (gas) was pressed.In the time must adding drilling rod, pressurization is fixed the complete locking of drilling rod, and the drill power head of the jointed rod head of decorporating adds drilling rod, jointed rod unit head again, expansible stopper 3 releases in liquid (gas) is pressed, drilling rod boring or down in the hand-hole under unit head advances.In the time must moving back drilling rod, drilling rod withdraws under unit head drives, and withdraws from the leading portion orifice tube when drilling rod connects hand, pressurization is fixed the complete locking of drilling rod, and the drill power head of the jointed rod head of decorporating unloads drilling rod, jointed rod unit head again, expansible stopper 3 releases in liquid (gas) is pressed.When many drilling rods withdraw from, repeat above action, withdraw from drilling rod by root.
High pressure valve 4 is used to move back and bores the back that finishes boring is sealed, and avoids high-pressure water shot to go out the device in aperture, and these parts are in open mode always in the process of creeping into, add drilling rod.When moving back drilling rod, when last root drilling rod (or drilling tool) retreat to liquid (gas) press in the expansible stopper 3 time, can close high pressure valve 4.High pressure valve 4 also can be used as one of sealed valve of pure pressure type grouting.
Referring to Fig. 2.
Drilling tool is stressed to be comprised: expansion power F
1, gravity G, frictional force f and water under high pressure thrust F
2, be example with the drilling tool of this type of engineering diameter 76 commonly used, length is that 0.5 meter interior expansible stopper is made force analysis, expansible stopper can be forced into 6MPa.
1) f=(G+F
1) * η coefficient
F wherein
1Equal to add pressure and multiply by surface area, steel pipe and rubber friction coefficient η equal 0.5 and calculate, and G can ignore.
F=F
1* η coefficient=3.14 * 7.6 * 50 * 60kg/cm2 * 10N/kg * 0.5=357960N
2)f＞F
2
f＝357960N＞F
2＝P
max×S
P
max＜f/S＝357960/(3.14×3.8
2×10)＝789.5kg/cm
2
By above calculating, the nearly 79MPa of the maximum pressure that interior expansible stopper can bear, the maximum pressure 12MPa that meets on the present engineering considers other unfavorable factor again, can think that this system's expansible stopper is safe and reliable.
Add drill method about the boring (grouting) that utilizes device of the present utility model, hereinafter be described in conjunction with concrete operating mode:
Operating mode one: rod boring adds when boring
(1) the described high pressure valve of this operating mode is an open mode always, and when a rod boring finishes, during only surplus linkage, expansible stopper in starting makes it and drilling rod embraced mutually and formed sealing;
(2) withdraw from the drilling rod unit head, with last linkage with newly add being connected of drilling rod, unclamp again liquid (gas) press in expansible stopper, creep into then;
(3) repeat (1), (2) are until being drilled into the design hole depth.
Operating mode two: when adding drilling rod (Grout-jetting pipe) in having holed and carrying out circulating grouting
(1) the described high pressure valve of this operating mode is for closing complete state, and unit head first drilling rod of drive (Grout-jetting pipe) enters expansible stopper, and expansible stopper seals itself and drilling rod (Grout-jetting pipe) locking and formation in starting.Open high pressure valve, after this high pressure valve is an open mode.
(2) withdraw from the drilling rod unit head, with last linkage with newly add being connected of drilling rod, unclamp again liquid (gas) press in expansible stopper.
(3) drilling rod (Grout-jetting pipe) is wanted up to adding last in repeating step (1)～(2); Step (2) described " linkage " can be a screw thread, also can be the connection hand of the one section drilling rod in the place ahead more.Because of it is in the place ahead of the drilling rod that will be removed, so be called " last linkage ".
" one section drilling rod " in aforementioned each step can be understood as joint drilling rod, i.e. a drilling rod between two adjacent connection hands usually.Certainly, if once unload two continuous drilling rods, also belong in the scope of " one section drilling rod " of the present utility model.
Operating mode two described drilling rods are usually also as the Grout-jetting pipe of circulating grouting, and different when creeping into is to add drilling tool and drill bit before the drilling rod when creeping into, and does not want drilling tool and drill bit during grouting.
Claims (5)
1, high pressure water rock layer is holed/is added and bores/move back the brill locking device, comprise leading portion orifice tube (20) and back segment orifice tube (10), be provided with sealing ring (1) in the leading portion orifice tube (20), it is characterized in that, between leading portion orifice tube (20) and back segment orifice tube (10), be serially connected with high pressure valve (4).
2, high pressure water rock layer as claimed in claim 1 is holed/is added and bores/move back the brill locking device, it is characterized in that, also is provided with a pressure seal arrangement (3) in leading portion orifice tube (20).
3, high pressure water rock layer as claimed in claim 2 is holed/is added and bores/move back the brill locking device, it is characterized in that, described pressure seal arrangement (3) is buckling sealing plug or the interior buckling sealing plug of air pressure in the hydraulic pressure.
4, high pressure water rock layer as claimed in claim 1 is holed/is added and bores/move back the brill locking device, it is characterized in that, is connected by flange between described high pressure valve (4) and leading portion orifice tube, the back segment orifice tube.
5, high pressure water rock layer as claimed in claim 2 is holed/is added and bores/move back the brill locking device, it is characterized in that, described pressure seal arrangement is arranged at the place ahead of sealing ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520036123 CN2878658Y (en) | 2005-11-16 | 2005-11-16 | Drilling/further drilling/back drilling sealing device for high-pressure cryolaccolith layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520036123 CN2878658Y (en) | 2005-11-16 | 2005-11-16 | Drilling/further drilling/back drilling sealing device for high-pressure cryolaccolith layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2878658Y true CN2878658Y (en) | 2007-03-14 |
Family
ID=37861073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520036123 Expired - Lifetime CN2878658Y (en) | 2005-11-16 | 2005-11-16 | Drilling/further drilling/back drilling sealing device for high-pressure cryolaccolith layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2878658Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900475B (en) * | 2005-09-30 | 2010-05-12 | 四川拓展建设工程有限公司 | Drilling/feed drill/withdrawing drill sealing device for high pressure water rock layer and grouting withdrawing drill method |
-
2005
- 2005-11-16 CN CN 200520036123 patent/CN2878658Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900475B (en) * | 2005-09-30 | 2010-05-12 | 四川拓展建设工程有限公司 | Drilling/feed drill/withdrawing drill sealing device for high pressure water rock layer and grouting withdrawing drill method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20070314 Effective date of abandoning: 20100512 |