CN212927719U - Explosion-proof guiding device for air drilling - Google Patents
Explosion-proof guiding device for air drilling Download PDFInfo
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- CN212927719U CN212927719U CN202021533489.6U CN202021533489U CN212927719U CN 212927719 U CN212927719 U CN 212927719U CN 202021533489 U CN202021533489 U CN 202021533489U CN 212927719 U CN212927719 U CN 212927719U
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- discharge pipeline
- sand discharge
- pressure relief
- relief pipe
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Abstract
The utility model provides an explosion-proof guiding device of air drilling, the device include blowout preventer stack, rotary control head, sand discharge pipeline, air compressor, air drill pressure relief pipe, combustion chamber, blowout preventer stack's rotary control head casing installs the sand discharge pipeline in flange department, and the other end of sand discharge pipeline extends to the combustion chamber, and the sand discharge pipeline includes one section turn, and the one end at the air drill pressure relief pipe is connected to air compressor's output, and the other end and the sand discharge pipeline welded connection of air drill pressure relief pipe to the part of stretching into of air drill pressure relief pipe is located the turn, and the pipe diameter of air pressure relief pipe < sand discharge pipeline's pipe diameter, and the velocity of flow of the intraductal air of air pressure relief > the interior gas flow velocity of sand discharge pipeline. The utility model provides an explosion-proof water conservancy diversion mechanism of air drilling forms "vacuum area" through making "venturi" to solve the natural gas burning explosion risk that exists on the construction.
Description
Technical Field
The utility model belongs to the technical field of oil gas development, especially, relate to an explosion-proof guiding device of air drilling.
Background
Aiming at stratums which are easy to leak and have poor drillability, air drilling is an economic drilling means, but due to the fact that the geological prediction technology is not accurate enough, a gas layer can be drilled in the construction process, underground explosion happens due to careless operation, and serious accidents of well bore scrapping can be caused; if the drilling encounters the air layer to immediately change mud, the same layer can be sprayed and the drilling failure is complicated. If the air drilling objective has been substantially achieved, casing "dry" cementing is the most economical way to make the hole. However, because natural gas exists in the shaft, the natural gas is not properly overflowed and disposed in the casing running process, fire and explosion occur, accidents of machine damage and people death can be caused, and the construction risk is very high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the defect that above-mentioned prior art exists, provide an explosion-proof guiding device of air drilling, through making "venturi", form "vacuum area" to solve the danger that exists in the construction.
The utility model adopts the following technical scheme:
an explosion-proof flow guide device for air drilling is characterized in that a rotary control head shell comprises a blowout preventer group, a rotary control head, a sand discharge pipeline, an air compressor, an air drill pressure relief pipe and a combustion pool.
The rotary control head shell of the air drill is provided with a sand discharge pipeline at a flange, the other end of the sand discharge pipeline extends to a combustion pool, the sand discharge pipeline comprises a section of turning part, the output end of an air compressor is connected with one end of a pressure relief pipe of the air drill, the other end of the pressure relief pipe of the air drill is connected with the sand discharge pipeline in a welding manner, the part of the pressure relief pipe of the air drill extends into the turning part of the sand discharge pipeline, the pipe diameter of the pressure relief pipe of the air drill is less than the pipe diameter of the sand discharge pipeline, and the flow rate of the air in the pressure relief pipe is greater than the gas flow rate in the. The venturi tube is manufactured, the airflow discharged by the air compressor is thinned from thick, a vacuum area is formed on the rear side of the outlet of the air pressure relief pipe by accelerating the flow rate of the gas, the vacuum area generates certain adsorption to adsorb the natural gas in the shaft and discharge the natural gas to the combustion pool, and the safety of casing running operation is ensured.
Preferably, the protruding part of the air drill pressure relief tube is located at least 1000mm inside the turn. The port nozzle diameter was 36 mm.
The utility model has the advantages that:
the utility model discloses install an "air drilling explosion-proof water conservancy diversion mechanism" additional on the sand discharge pipeline of air brill, can effectively solve the problem of background art, the principle is, utilize the partial welding of stretching into of air brill pressure release pipe in the turn portion of sand discharge pipeline, make into one "venturi", the air compressor combustion gas flow is by the coarse thinning, through accelerating the gas flow rate, the rear side of air brill pressure release pipe export forms one "vacuum area", "vacuum area" produces the natural gas absorption of certain adsorption in with the pit shaft, discharge the burning pond burning, make pure natural gas can not spill over rotatory preventer to rig floor in the pit shaft, can ensure the safety of lower casing operation.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of a portion of a sand drain line welded to an air drill pressure relief tube.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the following description is given for clarity and completeness in combination with the technical solutions of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-2, the technical solution of the present invention is: an explosion-proof diversion mechanism for air drilling comprises a blowout preventer group 1, a rotary control head 2, a sand discharge pipeline 3, an air compressor 4, an air drill pressure relief pipe 5 and a combustion pool 6.
The shell of a rotary control head 2 of the blowout preventer group 1 is provided with a sand discharge pipeline 3 at a flange, the other end of the sand discharge pipeline 3 extends to a combustion pool 6, the sand discharge pipeline 3 comprises a section of turning part 3-1, the output end of an air compressor 4 is connected with one end of an air drill pressure relief pipe 5, the other end of the air drill pressure relief pipe 5 is connected with the sand discharge pipeline 3 in a welding manner, part of the air drill pressure relief pipe 5 extends into the turning part 3-1 of the sand discharge pipeline 3, the pipe diameter of the air pressure relief pipe 5 is smaller than that of the sand discharge pipeline 3, and the flow rate of air in the air pressure relief pipe 5 is larger than the gas flow rate in the sand discharge pipeline 3. Thereby, a venturi tube is manufactured, the airflow discharged by the air compressor is thinned from rough, a vacuum area is formed at the rear side of the outlet of the air pressure relief pipe 5 by accelerating the flow rate of the gas, the vacuum area generates certain adsorption to adsorb the natural gas in the shaft and discharge the natural gas to a combustion pool, and the safety of casing running operation is ensured.
Preferably, the extending part of the air drill pressure relief pipe 5 is positioned in the turning part 3-1 at a distance of at least 1000mm, and the diameter of the end nozzle is 36 mm.
The working mode is as follows:
according to the output condition of the natural gas in the shaft, the gas injection amount of the air compressor is adjusted, the concentration of the natural gas in the air is lower than 3% after the natural gas and the air are mixed, and the explosion is avoided.
Examples
The Dajia 206 well of the 70138XN well team constructed by Chongqing drilling division company is in the well depth of 2518 meters, air drilling meets good oil gas and shows, the ignition flame reaches 7-8m, the estimated daily output of natural gas is about 5000 cubic meters, by applying the mechanism, the natural gas content of the well mouth and the drill floor is zero, the drilling team safely puts down a casing to the preset well depth and well cementation is smoothly carried out, the drilling cost is saved, and good effects are obtained.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (2)
1. The utility model provides an air drilling blast protection guiding device, includes blowout preventer stack, rotary control head, sand discharge pipeline, air compressor, air drill pressure relief pipe, combustion tank, its characterized in that, the rotary control head casing of blowout preventer stack install the sand discharge pipeline in flange department, the other end of sand discharge pipeline extends to the combustion tank, the sand discharge pipeline includes one section turn, the one end of air drill pressure relief pipe is connected to air compressor's output, the other end and the welded connection of sand discharge pipeline of air drill pressure relief pipe, and the part of air drill pressure relief pipe stretches into in the sand discharge pipeline turn, the pipe diameter of air pressure relief pipe is less than the pipe diameter of sand discharge pipeline, and the velocity of flow of air in the air pressure relief pipe > the velocity of flow of gas in the sand discharge pipeline.
2. The air drilling anti-explosion flow guide device according to claim 1, wherein the extending part of the air drilling pressure relief pipe is positioned at least 1000mm in the turning part, and the diameter of the port nozzle is 36 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021533489.6U CN212927719U (en) | 2020-07-29 | 2020-07-29 | Explosion-proof guiding device for air drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021533489.6U CN212927719U (en) | 2020-07-29 | 2020-07-29 | Explosion-proof guiding device for air drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212927719U true CN212927719U (en) | 2021-04-09 |
Family
ID=75332849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021533489.6U Active CN212927719U (en) | 2020-07-29 | 2020-07-29 | Explosion-proof guiding device for air drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212927719U (en) |
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2020
- 2020-07-29 CN CN202021533489.6U patent/CN212927719U/en active Active
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