CN203008856U - Cement buoyancy valve in gas pump drainage hole operating sleeve - Google Patents
Cement buoyancy valve in gas pump drainage hole operating sleeve Download PDFInfo
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- CN203008856U CN203008856U CN 201220595736 CN201220595736U CN203008856U CN 203008856 U CN203008856 U CN 203008856U CN 201220595736 CN201220595736 CN 201220595736 CN 201220595736 U CN201220595736 U CN 201220595736U CN 203008856 U CN203008856 U CN 203008856U
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Abstract
The utility model relates to a cement buoyancy valve in a gas pump drainage hole operating sleeve. The cement buoyancy valve in the gas pump drainage hole operating sleeve comprises the operating sleeve, a high-pressure valve, a welding plate, a throttle valve, a gas tube and a cement paste body. The welding plate is arranged at the bottom of the buoyancy valve. The periphery of the welding plate is welded on the inner wall of the operating sleeve. The gas tube penetrates through the cement paste body in a longitudinal mode. The high-pressure valve is welded on an opening at the upper end of the gas tube. The throttle valve is welded on the lower portion of the gas tube. A steel bar ring and a metal overhead hook are further welded on the inner wall of the operating sleeve. According to the buoyancy valve, not only is gas filled to the lower portion, but also the steel bar ring and the metal overhead hook are arranged on the inner wall of the buoyancy valve, a skid resistant property of the buoyancy valve is added, high-pressure environment of the lower portion of the buoyancy valve is adapted in a better mode, dangerousness of invalidation of the buoyancy valve is reduced, and a regular buoyancy piston can be widely replaced in practical engineering application.
Description
Technical field
The utility model belongs to coal Comprehensive Gas Control field, relates to gas exhaust drilling construction technology, is specifically related to the cement floating valve in a kind of gas-discharging hole working column.
Background technology
Highly gassy mine usually utilize gas-discharging hole the fire damp pump drainage to ground and be used.In the construction process of gas-discharging hole, need to be after boring be completed with working column at the bottom of the hole.
Determine lower pipe mode according to factors such as drilling depth, sleeve pipe material and equipment lifting abilities.For small-bore or more shallow boring, the rig hoisting power generally adopts under the lifting method and manages during greater than the gross weight of working column.
, the degree of depth darker boring large for the aperture surpass the rig hoisting power as the gross weight of working column, usually adopt under flotation stopper the pipe method with working column at the bottom of the hole, as shown in Figure 1.Under its technique and lifting method, the difference of pipe is, flotation stopper can stop mud to enter in the working column pipe in lower pipe process, increases the buoyancy of mud to working column in the hole, has offset most working column deadweight, alleviates the load of lifting equipment.
Flotation stopper is mainly to than using during the working column such as cast iron pipe, steel pipe under gun drilling.Material can be used steel, cement or timber etc.The example that is made as with the cement flotation stopper: the working column (length adds safety factor according to cement flotation stopper external force situation of depth capacity in the hole and determines) that selects this boring to use, after with wire brush, internal surface of sleeve pipe being cleaned out, along internal surface of sleeve pipe weldering steel ring or steel mesh reinforcement, increase the frictional force of cement plug and internal surface of sleeve pipe, prevent the whole slip of flotation stopper.Then solidifying waiting in the cement paste sprue bushing.
Along with the development of colliery industry, the coal mining degree of depth is more and more darker, increases because coal seam gas-bearing capacity has with the coal seam degree of depth, and therefore, along with the increase of the pit mining degree of depth, the degree of depth of gas exhaust boring and bore are also in continuous increase.The gross weight of working column is increasing, and the buoyancy that makes floating valve to provide correspondingly increases.
To dark big diameter borehole, from the force analysis of macroscopic view, lower plumber's skill adopts the problem of pipe meeting appearance two aspects under the flotation stopper method.One, being to provide more buoyancy needs to exist sufficiently long blank pipe, the increase of blank pipe length that mud is increased the external pressure of blank pipe above flotation stopper, increases the squeezed danger of ruining of working column.Therefore, the utility model proposes flotation stopper is changed system into floating valve, a passage is set in flotation stopper, pressure-air can be filled with the floating valve bottom, and the valve on closing passage top, make pressure-air be enclosed within the floating valve bottom, a part of buoyancy is provided, reduce the required blank pipe length in floating valve top.Its two, the hydraulic action of mud is removed the pressure of top mud in floating valve bottom, pressure differential allows floating valve produce whole trend of sliding.If floating valve produces whole the slip, that can make mud enter rapidly working column inside, makes the buoyancy fast reducing, thereby causes load moment of top lifting equipment to increase, and causes production accident.
The utility model content
adopt the blank pipe that exists in the construction of pipe method under flotation stopper long for solving, the outside mud problem excessive to the blank pipe lateral pressure, thereby reduce the danger of instrumentation tubes unstability, the utility model provides the cement floating valve in a kind of gas-discharging hole working column, the floating valve that the utility model provides not only can be inflated to the bottom, and be provided with steel ring and metal barb at the inwall of working column, increase the skid resistance of floating valve, adapted to better the larger environment of floating valve bottom hydraulic pressure, reduced the danger that floating valve lost efficacy, can extensively replace conventional flotation stopper in practical engineering application.
The utility model is achieved through the following technical solutions,
The utility model provides the cement floating valve in a kind of gas-discharging hole working column, comprise working column, high pressure valve, welding plate, choke valve, gas tube and cement slurry, described welding plate is arranged at the bottom of described floating valve, the surrounding of described welding plate is welded in the inwall of described working column, described gas tube vertically runs through described cement slurry, described high pressure valve is welded in the upper end open of described gas tube, described choke valve is welded in the bottom of described gas tube, and the inwall of described working column also is welded with steel ring and metal barb.
Preferably, described steel ring adopts single face full weld mode to be welded in the inwall of described working column, and the number of turns of described steel ring is 3～4 circles, and every circle interval 2m, the bar diameter of described steel ring are 12mm.
Preferably, the number of turns of described metal barb is 5～6 circles, 6, every circle, and every circle interval 1m, described metal barb are goat's horn shape reinforcing bar barb, the diameter of described reinforcing bar is 10mm.
Preferably, described gas tube is high-pressure rubber pipe.
Preferably, described welding plate is arranged at the above 150mm place, bottom of described working column.
The floating valve that the utility model provides not only can be inflated to the bottom, and be provided with steel ring and metal barb at the inwall of floating valve, increase the skid resistance of floating valve, adapted to better the larger environment of floating valve bottom hydraulic pressure, reduced the danger that floating valve lost efficacy, can extensively replace conventional flotation stopper in practical engineering application.
Description of drawings
Fig. 1 manages schematic diagram under common flotation stopper method.
Fig. 2 manages schematic diagram under floating valve of the present utility model.
Fig. 3 is floating valve schematic diagram of the present utility model.
Number in the figure is described as follows:
1 working column; 2 blank pipes; 3 mud; 4 flotation stoppers; 5 floating valves; 6 gas tubes; 7 welding plates; 8 enclosed high pressure gases; 9 high pressure valves; 10 steel rings; 11 metal barbs; 12 cement slurries.
The specific embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.Following examples will help those skilled in the art further to understand the utility model, but not limit in any form the utility model.Should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, can also make some distortion and improvement.These all belong to protection domain of the present utility model.
Take No. 5 gas-discharging holes in ore deposit, Huainan City as example, project profile: boring hole depth 816m, drilling diameter 790mm, the working column of the thick 15mm of external diameter 630mm is adopted in design, and the sleeve pipe material is steel, 185 tons of gross masses, restriction due to equipment, rig Design cooling load ability is 100 tons, and for guaranteeing certain safety factor, the maximum safe bearing load of rig is decided to be 90t.Under the employing floating valve, pipe need to provide buoyancy 185-90=95t, and this buoyancy will directly act on floating valve.In order to guarantee the intensity of floating valve, floating valve cement slurry length is selected 7.2m.
Claims (5)
1. the cement floating valve in a gas-discharging hole working column, comprise working column, high pressure valve, welding plate, choke valve, gas tube and cement slurry, described welding plate is arranged at the bottom of described floating valve, the surrounding of described welding plate is welded in the inwall of described working column, described gas tube vertically runs through described cement slurry, described high pressure valve is welded in the upper end open of described gas tube, described choke valve is welded in the bottom of described gas tube, it is characterized in that, the inwall of described working column also is welded with steel ring and metal barb.
2. the cement floating valve in gas-discharging hole working column according to claim 1, it is characterized in that, described steel ring adopts single face full weld mode to be welded in the inwall of described working column, the number of turns of described steel ring is 3～4 circles, every circle interval 2m, the bar diameter of described steel ring are 12mm.
3. the cement floating valve in gas-discharging hole working column according to claim 2, is characterized in that, the number of turns of described metal barb is 5～6 circles, 6, every circle, and every circle interval 1m, described metal barb is the reinforcing bar barb, the diameter of described reinforcing bar is 10mm.
4. the cement floating valve in gas-discharging hole working column according to claim 1, is characterized in that, described gas tube is high-pressure rubber pipe.
5. the cement floating valve in gas-discharging hole working column according to claim 1, is characterized in that, described welding plate is arranged at the above 150mm place, bottom of described working column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595736 CN203008856U (en) | 2012-11-03 | 2012-11-03 | Cement buoyancy valve in gas pump drainage hole operating sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595736 CN203008856U (en) | 2012-11-03 | 2012-11-03 | Cement buoyancy valve in gas pump drainage hole operating sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203008856U true CN203008856U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220595736 Expired - Fee Related CN203008856U (en) | 2012-11-03 | 2012-11-03 | Cement buoyancy valve in gas pump drainage hole operating sleeve |
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| Country | Link |
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| CN (1) | CN203008856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937012A (en) * | 2012-11-03 | 2013-02-20 | 安徽理工大学 | Cement buoyant valve in gas pumping hole working sleeve and manufacture method thereof |
-
2012
- 2012-11-03 CN CN 201220595736 patent/CN203008856U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937012A (en) * | 2012-11-03 | 2013-02-20 | 安徽理工大学 | Cement buoyant valve in gas pumping hole working sleeve and manufacture method thereof |
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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: 20130619 Termination date: 20141103 |
|
| EXPY | Termination of patent right or utility model |