CN201896599U - Platen sealing device - Google Patents
Platen sealing device Download PDFInfo
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- CN201896599U CN201896599U CN2010206634811U CN201020663481U CN201896599U CN 201896599 U CN201896599 U CN 201896599U CN 2010206634811 U CN2010206634811 U CN 2010206634811U CN 201020663481 U CN201020663481 U CN 201020663481U CN 201896599 U CN201896599 U CN 201896599U
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- pipe
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- screen casing
- block plate
- block
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Abstract
The utility model discloses a platen sealing device, which comprises a variable diameter component. The variable diameter component comprises a connector pipe and a solid pipe, the connector pipe is sleeved outside the first end of the solid pipe, the overlapped part of the first end of the solid pipe and the connector pipe is provided with matching first threads, and the outer wall of the overlapped part of the connector pipe and the solid pipe is provided with a first retaining plate; a sieve pipe is sleeved outside the second end of the solid pipe, the outer wall of the overlapped part of the sieve pipe and the solid pipe is provided with a second retaining plate, and the outside diameter of the second retaining plate is equal to or larger than the outside diameter of the connector pipe; and a sealing object is wound on the outer wall of the solid pipe between the first retaining plate and the second retaining plate, and the connector pipe is moved to be near the sieve pipe when the first threads are loosened, so that the sealing object can be tightly clamped by the first retaining plate and the second retaining plate. By adopting the platen sealing device, the sealing effect can be achieved within a short time on the premise of that the solid pipe is successfully connected with the sieve pipe within one step. Moreover, the platen sealing device is suitable for high-pressure oil well cementation.
Description
Technical field
The utility model embodiment relates to the drilling tool structure technology, relates in particular to a kind of platen water-stop.
Background technology
The control of gas disaster occupies extremely important status in China's mining activities, the gas pressure relief of wherein exploiting topping is one of most important measure.In order to improve the effect of exploitation topping, utilize the gas pressure relief of hole pumping and mining technology exploitation topping usually.When the exploitation of ground drilling well and underlying seam combines pumping and mining pressure relief mash gas; ground drilling passes protected seam coal seam, top, construction stops boring to the fissure zone of bottom topping coal top board top; cement the well then and be lowered to the petroleum casing pipe of pumping and mining pressure relief mash gas; and utilize release " antireflection " and " incremental effect "; the gas pressure relief of extraction top protected seam; reduce gas bearing capacity, improve the protection effect.In the existing technology, the hole pumping and mining technology transfer oil cementing technology, can shorten the construction period, improve extraction tolerance, prolong the application life of extraction well.
Traditional mash gas extraction technology is lowered to behind the outer sleeve screen casing down, and then is lowered to real pipe and screen casing intussusception.The drawback of this down tube side method is: the first, and screen casing pulls out of hole again down earlier, and real down then pipe with regard to many processes that trip-out is bored down again, has prolonged the production time like this.The second, the reason such as little and hole deviation owing to the annular gap between screen casing and the real pipe, screen casing and real pipe are very difficult to inserting.Shown in Figure 1A, for advancing formula with the conventional mask of real pipe 102, screen casing 101 is connected, realize that by changeover portion 104 expanded rubber 103 is between real pipe 102 and outer sleeve 105; Shown in Figure 1B,, realize that expanded rubber 113 is between real pipe 112 and outer sleeve 115 for traditional plug-in type of screen casing 111 with real pipe 112 is connected by changeover portion 114.
But, no matter adopt above-mentioned which kind of mode, all can not guarantee intussusception success once in screen casing and the real pipe bit hole.If two pipe boxes are folded unsuccessful, just real pipe need be pulled and adjust the position real pipe of underlying again, till intussusception is successful, serious like this waste the man power and material.
In addition, because ground drilling passes the partially aqueous layer, a large amount of swellings was gone into the effect that has had a strong impact on gas pumping in the well after drilling well was adopted and destroyed, and therefore, needed sleeve pipe is sealed sealing in drilling process, adopted the effect of gas pressure relief to guarantee extraction.The water-stopping method that traditional technology adopted carries out sealing for adopting the method for expanded rubber sealing between real pipe and the outer sleeve, but because expanded rubber self, especially under high pressure, its sealing performance is relatively poor, fully sealing.
Therefore, need a kind of new water-stop, not only can guarantee the disposable successful intussusception of screen casing and real pipe, can also under high pressure play hermetic seal effect preferably.
The utility model content
The utility model provides a kind of platen water-stop, with the disposable successful intussusception of guarantor's confirm tube and screen casing, and under high pressure plays hermetic seal effect preferably.
The utility model embodiment provides a kind of platen water-stop, comprising:
The reducing assembly, described reducing assembly comprises junction block and real pipe, described junction block is set in the outside of described real pipe first end, overlapping sheathed part is provided with first screw thread that cooperatively interacts between first end of described real pipe and the described junction block, and the outer wall of described junction block and the overlapping sheathed part of described real pipe is provided with first block plate;
Screen casing, described screen pipe sleeve are located at the outside of described real pipe second end, and the outer wall of described screen casing and the overlapping sheathed part of described real pipe is provided with second block plate, and the external diameter of described second block plate is equal to or greater than the external diameter of described junction block;
The sealing thing is wrapped on the real pipe outer wall between described first block plate and described second block plate, wherein, is under the releasing orientation described junction block at described first screw thread and moves to and be adjacent to described screen casing, and described first block plate and second block plate clamp described sealing thing.
Aforesaid platen water-stop, preferably, described sealing thing comprises cotton and putty.
Aforesaid platen water-stop, preferably, the thickness of described sealing thing is 10～25mm.
Aforesaid platen water-stop, preferably, overlapping sheathed part is provided with second screw thread that cooperatively interacts between second end of described real pipe and the described screen casing, described second screw thread screw direction and described first screw thread to unclamp direction consistent.
The platen water-stop that the utility model provides under the situation of the disposable successful connection of protecting confirm tube and screen casing, plays the sealing effect within a short period of time, and is applicable to high pressure oil well shaft fixing technology, saves production cost, and shortens construction period.
Description of drawings
Figure 1A advances the formula connection layout for the cover of screen casing of the prior art and real pipe;
Figure 1B is traditional plug-in type connection layout of screen casing of the prior art and real pipe;
Fig. 2 A for according to the utility model embodiment do not form waterstop the time platen water-stop sectional drawing;
Fig. 2 B is the sectional drawing according to the reducing assembly of the platen water-stop of the utility model embodiment;
Fig. 3 is the state diagram that the platen water-stop of the utility model embodiment forms waterstop.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
Shown in Fig. 2 A, the generalized section of the platen water-stop that provides for the utility model embodiment one, platen water-stop 200 comprises reducing assembly and screen casing 202, is positioned at outer sleeve 210.
The reducing assembly comprises two parts, shown in Fig. 2 B, is respectively junction block 203 and real pipe 204.Junction block 203 is set in the outside of real pipe 204 first ends.Wherein, the normal dia of junction block 203 can be 219mm, and conventional wall thickness is 10mm.Overlapping sheathed part is provided with first screw thread that cooperatively interacts between first end of real pipe 204 and the junction block 203.Wherein, junction block 203 is a box, and real pipe 204 is a pin thread.Junction block 203 can be set to 235mm according to the normal dia of junction block 203 with the external diameter that real outer wall of managing 204 laps is provided with first block plate, 205, the first block plates 205.
Preferably, sealing thing 207 selected in the present embodiment comprises cotton and putty, and thickness can be 10～25mm.
According to foregoing description, be down-set in the boring after first screw thread of platen water-stop 200 screwed, hinged pipe 203 then, first screw thread is unclamped, junction block 203 breaks away from real pipe 204 also owing to the weight of self falls, the direction that falls is that junction block 203 moves to and is adjacent to screen casing 202, until because till the effect of second block plate 206 can not continue to fall.Junction block 203 can be clamped in sealing thing 207 between first block plate 205 and second block plate 206, and sealing thing 207 is blocked between platen water-stop 200 and the outer sleeve 210 in the process that falls.At this moment, sealing thing 207 forms waterstop 208 at platen water-stop 200 between outer sleeve 210, as shown in Figure 3, and for junction block 203 falls the schematic diagram that the back forms waterstop.
This waterstop 208 is by the distortion of cotton, putty, filling is risen between real platen water-stop 200 and the outer sleeve 210, can stop the water of waterstop 208 tops or the below that cement paste penetrates into waterstop 208, and intercept real pipe 204 in top and the communication of lower screen 202 in its annular gap, play the effect of sealing.In the cement slurry cementing process, returning the slurry hole that water or cement paste stay in advance from real pipe bottom returned between real pipe and the outer sleeve, because the iris action of greasy filth and cotton, water or mud advance fully less than the outer czermak space of screen casing.Because this waterstop just can play sealing effect preferably in forming, do not need therefore, to have shortened construction period widely through other processing.And there is experiment to show that it still can keep good stagnant water effect under up to the pressure of 20MPa, can be applied in the high pressure well shaft fixing technology fully.
In addition, because this platen water-stop has comprised real pipe and screen casing, and be under situation about having connected, real pipe to be down-set in the boring simultaneously with screen casing, like this can not the real pipe of disposable connection and the problem of screen casing with regard to what avoided may occurring in the traditional handicraft.That is,, can protect the disposable successful connection of confirm tube and screen casing, save great amount of manpower and material resources, greatly improve production efficiency according to the platen water-stop of present embodiment.And, use this platen water-stop isolated water and cement paste, can effectively improve cementing quality.Especially,, help holing into open-work and hole flushing behind the well because no longer there is changeover portion in traditional water-stopping method in screen casing, the flow resistance when having reduced mash gas extraction, gas output can improve about 20～30%.
Embodiment two
Present embodiment has further been optimized the annexation between real pipe 204 and the screen casing 202 based on embodiment one described platen water-stop 200 technical schemes.Overlapping sheathed part is provided with second screw thread that cooperatively interacts between second end of real pipe 204 and the screen casing 202, second screw thread screw direction and first screw thread to unclamp direction consistent.
Platen water-stop according to present embodiment is made under the situation of the disposable successful connection of protecting confirm tube and screen casing, plays the sealing effect within a short period of time, and is applicable to high pressure oil well shaft fixing technology, saves production cost, and shortens construction period.And, when making it break away from real pipe, hinged pipe is equivalent to screen casing carried out button, and make real pipe tightr with being connected of screen casing, the connecting portion of real pipe and screen casing can not come off because of the rotation of junction block, and what assurance was constructed normally carries out.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (4)
1. a platen water-stop is characterized in that, comprising:
The reducing assembly, described reducing assembly comprises junction block and real pipe, described junction block is set in the outside of described real pipe first end, overlapping sheathed part is provided with first screw thread that cooperatively interacts between first end of described real pipe and the described junction block, and the outer wall of described junction block and the overlapping sheathed part of described real pipe is provided with first block plate;
Screen casing, described screen pipe sleeve are located at the outside of described real pipe second end, and the outer wall of described screen casing and the overlapping sheathed part of described real pipe is provided with second block plate, and the external diameter of described second block plate is equal to or greater than the external diameter of described junction block;
The sealing thing is wrapped on the real pipe outer wall between described first block plate and described second block plate, wherein, is under the releasing orientation described junction block at described first screw thread and moves to and be adjacent to described screen casing, and described first block plate and second block plate clamp described sealing thing.
2. platen water-stop according to claim 1 is characterized in that, described sealing thing comprises cotton and putty.
3. platen water-stop according to claim 2 is characterized in that, the thickness of described sealing thing is 10～25mm.
4. platen water-stop according to claim 1, it is characterized in that, overlapping sheathed part is provided with second screw thread that cooperatively interacts between second end of described real pipe and the described screen casing, described second screw thread screw direction and described first screw thread to unclamp direction consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206634811U CN201896599U (en) | 2010-12-10 | 2010-12-10 | Platen sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206634811U CN201896599U (en) | 2010-12-10 | 2010-12-10 | Platen sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201896599U true CN201896599U (en) | 2011-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206634811U Expired - Fee Related CN201896599U (en) | 2010-12-10 | 2010-12-10 | Platen sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201896599U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696725A (en) * | 2013-11-12 | 2014-04-02 | 湖北中南勘察基础工程有限公司 | Drilling water stop |
| CN108518196A (en) * | 2018-04-08 | 2018-09-11 | 徐州大屯工程咨询有限公司 | A kind of drilling antipriming |
-
2010
- 2010-12-10 CN CN2010206634811U patent/CN201896599U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696725A (en) * | 2013-11-12 | 2014-04-02 | 湖北中南勘察基础工程有限公司 | Drilling water stop |
| CN103696725B (en) * | 2013-11-12 | 2016-07-06 | 湖北中南勘察基础工程有限公司 | A kind of boring water-stop |
| CN108518196A (en) * | 2018-04-08 | 2018-09-11 | 徐州大屯工程咨询有限公司 | A kind of drilling antipriming |
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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: 20110713 Termination date: 20161210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |