CN214886853U - Buoyancy device for pipe laying construction of large-diameter drilling well - Google Patents
Buoyancy device for pipe laying construction of large-diameter drilling well Download PDFInfo
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- CN214886853U CN214886853U CN202121009126.7U CN202121009126U CN214886853U CN 214886853 U CN214886853 U CN 214886853U CN 202121009126 U CN202121009126 U CN 202121009126U CN 214886853 U CN214886853 U CN 214886853U
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- pipe
- drilling
- sleeve
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Abstract
The utility model relates to a buoyancy device for large-caliber drilling and pipe laying construction, which comprises a sleeve and a bottom plate, wherein the sleeve is vertically arranged, and the upper end and the lower end of the sleeve are both open; the bottom plate is horizontally and fixedly arranged at the lower end of the sleeve and used for sealing the lower end of the sleeve and generating buoyancy when the well is lowered. The beneficial effects of the utility model are that simple structure, the section is drawn in the production that the low pipe in-process can be safe in the large aperture well drilling to realize "drawing in the air buoyancy" low pipe, effectively reduce the rig load, the practicality preferred.
Description
Technical Field
The utility model relates to a heavy-calibre probing construction technical field, concretely relates to buoyancy device of heavy-calibre drilling low tube construction.
Background
The gas outburst is one of the most serious safety problems in coal mines, as the deep mining depth of the mines in China is gradually deepened, more and more mines and coal beds are outburst, and meanwhile, the complex geological environment and mining conditions of the coal mines in China are also important factors causing multiple gas accidents. Therefore, in order to ensure the safe production of mines and reduce the occurrence of gas accidents, the gas must be prevented and controlled.
At present, a part of mines begin to adopt a large-caliber gas direct-discharging technology to prevent and control gas, and the technology adopts a long-distance drilling mode, so that the construction period is short, the drainage effect is good, the technology begins to be widely popularized in a plurality of mines, and the technology gradually becomes a main technical means for preventing and controlling gas in the mines. But the bearing capacity of the drilling tower is limited due to the heavy weight of the casing during the pipe laying process. Therefore, the 'emptying buoyancy' is needed to reduce the load of the drilling tower, but the common buoyancy device has long manufacturing period and high price.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a buoyancy device of heavy-calibre drilling low tube construction is provided, aim at solving above-mentioned technical problem.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a buoyancy device for large-caliber drilling and pipe descending construction comprises a sleeve and a bottom plate, wherein the sleeve is vertically arranged, and the upper end and the lower end of the sleeve are both open; the bottom plate is horizontally and fixedly arranged at the lower end of the sleeve and used for sealing the lower end of the sleeve and generating buoyancy when the bottom plate goes into a well.
The utility model has the advantages that: when the device is used, the lower end of the sleeve is sealed by the bottom plate, the drilled well is filled with water, and buoyancy is generated by the bottom plate when the pipe is lowered, so that the load of the drilling tower is effectively reduced. The utility model discloses simple structure, the section of hollowing out of production that the low pipe in-process can be safe in the large aperture well drilling to realize "hollowing out buoyancy" low pipe, effectively reduce the rig load, the practicality preferred.
In the traditional technology, the upper end and the lower end of a casing are both open, the casing pipe can not be lowered in the process of drilling, the drilling tower needs to bear the weight of the whole casing pipe, and the load is large.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, a reserved hole which penetrates through the bottom plate from top to bottom is formed in the bottom plate, and a sealing plate is detachably mounted at the reserved hole.
The method has the advantages that the reserved holes are sealed by the sealing plates in the pipe discharging process, so that the lower end of the sleeve is in a closed state, and the load of the drilling tower can be reduced by effectively utilizing the buoyancy of water in the drilling well during pipe discharging; after the pipe is lowered, the sealing plate is broken by the drilling tool, so that subsequent operation can be performed, and the use is convenient.
Further, the closing plate is located below the bottom plate.
The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design breaks the shrouding after convenient low pipe is accomplished, and the shrouding directly drops, can not stay in the cover pipe, guarantees going on smoothly of follow-up operation.
Further, the closing plate is connected with the bottom plate through a plurality of screws.
The beneficial effects of adopting above-mentioned further scheme are that simple structure, conveniently demolish the shrouding after the low tube is accomplished.
Further, each screw is an aluminum screw.
The beneficial effect who adopts above-mentioned further scheme is that the quick assembly disassembly of shrouding is realized to the nature that utilizes aluminium matter screw easy-to-break, guarantees the efficiency of operation.
Further, the bottom plate is provided with a water stopping groove corresponding to the edge of the reserved hole, a water stopping ring is installed in the water stopping groove, and the sealing plate tightly presses the water stopping ring.
The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design utilizes the leakproofness that the seal increased reservation hole department, and furthest utilizes the buoyancy of well drilling water, effectively reduces the load of rig.
Further, the water stop ring is made of rubber materials.
The beneficial effects of adopting above-mentioned further scheme are that sealed effectual, with low costs.
Furthermore, a guide pipe is vertically and fixedly installed in the position, corresponding to the position above the reserved hole, in the sleeve, and the upper end and the lower end of the guide pipe are both open and used for guiding the drilling tool.
The beneficial effect who adopts above-mentioned further scheme is that the back is accomplished to the low tube, leads to the drilling tool through the stand pipe, ensures that the drilling tool can be accurate act on the shrouding, improves the efficiency of operation.
Further, the guide pipe is of an inverted horn-shaped structure.
The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design, the guide effect is better.
Further, the bottom plate and the sealing plate are both steel plates.
The beneficial effect who adopts above-mentioned further scheme is that the material selection is reasonable, is convenient for break the shrouding smoothly after the low tube is accomplished.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a sleeve; 2. a base plate; 3. reserving holes; 4. closing the plate; 5. a screw; 6. a water stop ring; 7. a guide tube.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in figure 1, the utility model provides a buoyancy device for large-caliber drilling and pipe laying construction, which comprises a sleeve 1 and a bottom plate 2, wherein the sleeve 1 is vertically arranged, and the upper end and the lower end of the sleeve are both open; the bottom plate 2 is horizontally and fixedly installed at the lower end of the casing 1 in a manner that will occur to those skilled in the art, for sealing the lower end of the casing 1 and generating buoyancy when lowering the well, typically by welding. When the device is used, the lower end of the casing 1 is sealed by the bottom plate 2, a well is filled with water, and the casing 1 is sealed by the bottom plate 2 and generates buoyancy when the pipe is lowered, so that the load of the drilling tower is effectively reduced. The utility model discloses simple structure, the section of hollowing out of production that the low pipe in-process can be safe in the large aperture well drilling to realize "hollowing out buoyancy" low pipe, effectively reduce the rig load, the practicality preferred.
In the traditional technology, the upper end and the lower end of the casing 1 are both open, the casing 1 cannot be lowered in the process by means of buoyancy of water in a drilling well, the drilling tower needs to bear the weight of the whole casing, and the load is large.
Example 1
On the basis of above-mentioned structure, in this embodiment, be equipped with the reservation hole 3 that runs through from top to bottom on the bottom plate 2, reservation hole 3 department detachable installs shrouding 4. In the pipe lowering process, the reserved hole 3 is sealed by using the sealing plate 4, so that the lower end of the sleeve 1 is in a closed state, and the load of the drilling tower can be reduced by effectively utilizing the buoyancy of water in the drilling well during pipe lowering; after the pipe is lowered, the sealing plate 4 is broken by a drilling tool, so that subsequent operation can be performed, and the pipe lowering machine is convenient to use.
The above-mentioned preformed hole 3 is preferably arranged in the centre of the bottom plate 2.
Example 2
On the basis of embodiment one, in this embodiment, shrouding 4 is located the below of bottom plate 2, simple structure, and reasonable in design breaks shrouding 4 after convenient low tube is accomplished, and shrouding 4 directly drops in sleeve pipe 1's below, can not stay in sleeve pipe 1, guarantees going on smoothly of follow-up operation.
In addition to the above embodiments, the closing plate 4 may also be located in the reserved hole 3, but this solution is inconvenient for fixing the closing plate 4; sealing plate 4 may also be located within casing 1, but this way of breaking through sealing plate 4 may leave part of sealing plate 4 remaining within casing 1, possibly affecting subsequent operations.
Example 3
On the basis of embodiment one, in this embodiment, shrouding 4 is connected with bottom plate 2 through a plurality of screws 5, and simple structure makes things convenient for the low tube to accomplish the back and demolishs shrouding 4.
Example 4
On the basis of the third embodiment, preferably, in the present embodiment, each screw 5 is an aluminum screw. After the lower pipe is completed, the drilling tool penetrates through the sleeve 1 and the reserved holes 3 to act on the sealing plate 4, the quick disassembly and assembly of the sealing plate 4 are realized by the aid of the easy-to-break property of the aluminum screws, and operation efficiency is guaranteed.
The screws 5 can be made of other materials, but the screw tightness of the other materials is better than that of aluminum screws, and the difficulty in dismounting the sealing plate 4 is higher than that of the aluminum screws.
Example 5
On the basis of the first embodiment, in this embodiment, a water stopping groove is arranged at a position of the bottom plate 2 corresponding to the edge of the reserved hole 3, a water stopping ring 6 is installed in the water stopping groove, and the sealing plate 4 tightly presses the water stopping ring 6. This scheme simple structure, reasonable in design utilizes seal ring 6 to increase the leakproofness of reserving hole 3 department, and furthest's utilization is bored the buoyancy of water in the well, effectively reduces the load of rig.
Above-mentioned reservation hole 3 is preferred circularly, and the circular plate body is also preferred to shrouding 4 this moment, and the water stopping tank is the ring channel with reservation hole 3 adaptation.
Preferably, in this embodiment, the water stop ring 6 is made of rubber, so that the sealing effect is good, and the cost is low.
The water stopping groove can be positioned on the upper surface of the bottom plate 2, and the sealing plate 4 is positioned above the bottom plate 2; the stagnant water groove also can be located bottom plate 2's lower surface, preferred lower surface, and shrouding 4 is located bottom plate 2's below this moment, conveniently breaks shrouding 2, and does not influence follow-up construction operation.
Example 6
On the basis of the structure, in the embodiment, the guide pipe 7 is vertically and fixedly installed at the position, corresponding to the upper part of the reserved hole 3, in the sleeve 1, and the upper end and the lower end of the guide pipe 7 are both open and used for guiding the drilling tool; the lower end of the guide pipe 7 is fixedly connected with the upper surface of the bottom plate 2, and the reserved hole 3 is positioned in the guide pipe 7. After the lower pipe is completed, the drilling tool is guided through the guide pipe 7, the drilling tool can be accurately acted on the sealing plate 4, and the operation efficiency is improved.
Example 7
On the basis of the sixth embodiment, preferably, in this embodiment, the guide tube 7 is in an inverted trumpet-shaped structure, that is, the guide tube 7 is in a structure with a thick upper part and a thin lower part, and has a simple structure, a reasonable design and a better guiding effect.
In addition to the above-described structure, the guide tube 7 may be a straight tube, but this solution does not provide a guide for the drill as well as the above-described trumpet-shaped structure.
Example 8
On the basis of above-mentioned structure, in this embodiment, bottom plate 2 and shrouding 4 are the steel sheet, and the material selection is reasonable, breaks shrouding 4 smoothly after the low tube of being convenient for is accomplished to follow-up construction operation guarantees the efficiency of construction.
The working principle of the utility model is as follows:
the assembly process is as follows: firstly, arranging a reserved hole 3 at the center of a bottom plate 2, arranging a water stop groove at the position, corresponding to the edge of the reserved hole 3, on the bottom plate 2, and reserving a screw hole corresponding to a screw 5; welding the bottom plate 2 and the sleeve 1 together; the circular shape shrouding 4 of preparation to reserve with the screw hole one-to-one screw hole on the bottom plate 2, then place sealing washer 6 in the stagnant water inslot, connect shrouding 4 and bottom plate 2 through screw 5 at last, thereby can seal the device bottom.
The tube lowering process is as follows: a hollow section appears above the casing 1 in the pipe lowering operation process, so that buoyancy is generated to reduce the load borne by the drilling tower; after the casing 1 is lowered to a preset position, the casing 1 is filled with slurry, then the drilling is carried out, the sealing plate 4 is tamped down by using the weight of a drilling tool, and then the slurry is injected between the casing 1 and the well wall by using the drilling tool through a grouting pump, so that a well cementation channel is realized.
The drill rod in the drilling tool is a hollow pipeline, slurry is directly injected into the area between the casing 1 and the well wall through the drill rod, and then the drill rod and cement slurry inside the casing 1 are replaced and cleaned by clean water, so that well cementation is completed.
The utility model can safely generate the emptying section in the large-aperture pipe-lowering process, thereby realizing emptying buoyancy pipe-lowering and effectively reducing the load of the drilling tower; after the casing 1 is lowered to the set position, the lower temporarily closed closure plate 4 can be removed to make a passage for cementing.
The practical buoyancy device is simple and convenient in manufacturing process, easy to master, well verified in construction practice, widely applicable to various large-caliber drilling and pipe descending construction processes, safe, high in operability and simple in processing process, and is easy to popularize and use.
It should be noted that the drilling tool and the drilling tower are all in the prior art, and the specific structures thereof are not described herein again.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a buoyant device of heavy-calibre well drilling low tube construction which characterized in that: the device comprises a sleeve (1) and a bottom plate (2), wherein the sleeve (1) is vertically arranged, and the upper end and the lower end of the sleeve are both open; the bottom plate (2) is horizontally and fixedly arranged at the lower end of the casing (1) and is used for sealing the lower end of the casing (1) and generating buoyancy when the casing is lowered into the well.
2. The buoyant apparatus for pipe laying in heavy caliber drilling according to claim 1, wherein: the bottom plate (2) is provided with a reserved hole (3) which penetrates through the bottom plate from top to bottom, and a sealing plate (4) is detachably mounted at the reserved hole (3).
3. The buoyant apparatus for pipe laying in heavy caliber drilling according to claim 2, wherein: the closing plate (4) is positioned below the bottom plate (2).
4. The buoyant apparatus for large bore drilling and pipe lowering construction according to any one of claims 2 to 3, wherein: the closing plate (4) is connected with the bottom plate (2) through a plurality of screws (5).
5. The buoyant apparatus for pipe laying in heavy caliber drilling according to claim 4, wherein: each screw (5) is an aluminum screw.
6. The buoyant apparatus for large bore drilling and pipe lowering construction according to any one of claims 2 to 3, wherein: the bottom plate (2) correspond the position at preformed hole (3) edge is equipped with the stagnant water groove, install stagnant water circle (6) in the stagnant water groove, shrouding (4) sticis stagnant water circle (6).
7. The buoyant apparatus for pipe laying in heavy caliber drilling according to claim 6, wherein: the water stop ring (6) is made of rubber.
8. The buoyant apparatus for large bore drilling and pipe lowering construction according to any one of claims 2 to 3, wherein: the drill bit is characterized in that a guide pipe (7) is vertically and fixedly mounted in the position, corresponding to the position above the reserved hole (3), in the sleeve (1), the upper end and the lower end of the guide pipe (7) are both open and used for guiding a drill bit.
9. The buoyant apparatus for pipe laying in heavy caliber drilling according to claim 8, wherein: the guide pipe (7) is of an inverted horn-shaped structure.
10. The buoyant apparatus for large bore drilling and pipe lowering construction according to any one of claims 2 to 3, wherein: the bottom plate (2) and the sealing plate (4) are both steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121009126.7U CN214886853U (en) | 2021-05-12 | 2021-05-12 | Buoyancy device for pipe laying construction of large-diameter drilling well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121009126.7U CN214886853U (en) | 2021-05-12 | 2021-05-12 | Buoyancy device for pipe laying construction of large-diameter drilling well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214886853U true CN214886853U (en) | 2021-11-26 |
Family
ID=78946664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121009126.7U Expired - Fee Related CN214886853U (en) | 2021-05-12 | 2021-05-12 | Buoyancy device for pipe laying construction of large-diameter drilling well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214886853U (en) |
-
2021
- 2021-05-12 CN CN202121009126.7U patent/CN214886853U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |