CN211900525U - Prevent orifice pressurize drilling equipment in pit - Google Patents
Prevent orifice pressurize drilling equipment in pit Download PDFInfo
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- CN211900525U CN211900525U CN202020336245.2U CN202020336245U CN211900525U CN 211900525 U CN211900525 U CN 211900525U CN 202020336245 U CN202020336245 U CN 202020336245U CN 211900525 U CN211900525 U CN 211900525U
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Abstract
The utility model discloses a prevent orifice pressurize drilling equipment in pit, including the rig and with the rig cooperation and stretch into the drilling rod mechanism to the coal seam, the one end overcoat that drilling rod mechanism stretches out the coal seam is equipped with the protecting tube, the protecting tube includes the high pressure honeycomb duct of being connected with the hole sealing section of drilling and sets up and keeps away from the sleeve pipe that hole sealing section one end is used for reducing drilling rod friction and sealed drilling rod at the high pressure honeycomb duct, form the drilling clearance with high pressure honeycomb duct intercommunication between drilling rod mechanism and the drilling inner wall, be connected with the high pressure back flow that returns liquid mechanism intercommunication with the drilling fluid pressurize on the high pressure honeycomb duct. The utility model relates to a novelty utilizes the drilling fluid pressurize to return the inside and outside pressure of liquid mechanism balance drilling to utilize high-pressure return pipe to return the liquid mechanism to carry the gas-liquid-solid mixture of drilling clearance backward to the drilling fluid pressurize, connect the multisection through independent drilling rod and connect the drilling rod to form the drilling rod, realize the drilling pressurize, prevent the drilling fluid orifice.
Description
Technical Field
The utility model belongs to the technical field of prevent spouting hole pressurize drilling in the pit, concretely relates to prevent orifice pressurize drilling equipment in pit.
Background
When a coal rock layer with high gas content and high gas pressure is drilled in a coal mine, along with the exposure of a coal body of a drilled hole, the stress of the coal rock body on the hole wall of the drilled hole is redistributed, the pressure in the drilled hole is lower, high-pressure gas and other gas in the coal rock layer flow into the drilled hole, the coal body is easy to spray holes and even induced to protrude under the combined action of the gas pressure, the ground stress and the disturbance stress of the drilled hole, the sprayed coal wastes resources along with water flow, the operation environment is influenced, meanwhile, the holes formed by the sprayed holes have larger holes, the forming and the stability of the drilled hole are influenced, and the fracture of the coal rock body is changed by adopting methods such as fracturing and the like in; the operation safety is influenced by the mixture of gas, coal, drilling fluid and drill cuttings which are sprayed out through the induction of the uncontrollable spray holes, and the gas is easily over-limited due to the fact that a large amount of gas and other gas are gushed out, so that accidents such as gas suffocation and gas explosion are easily caused. When adopting the rig drilling in the pit in the colliery, current drilling rod can't cooperate drilling fluid balanced borehole internal pressure, and when withdrawing the brill, the drilling fluid that injects before can the orifice, and the orifice changes the coal petrography body wholeness, increases and digs the roof management degree of difficulty to influence safety in production. When drilling in weak rock, the collapse of the drilled hole is easily caused under the combined action of the ground stress and the disturbance stress of the drilled hole, and the stability and the forming of the drilled hole are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a prevent orifice pressurize drilling equipment in pit, its novel in design is reasonable, utilizes the drilling fluid pressurize to return the inside and outside pressure of liquid mechanism balance drilling to utilize high pressure return pipe to return liquid mechanism to the drilling fluid pressurize and carry the gas-liquid-solid mixture that the drilling clearance flows back, connect the multisection through independent drilling rod and connect the drilling rod and constitute the drilling rod, realize the drilling pressurize, prevent drilling fluid orifice, convenient to popularize and use.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a hole pressurize drilling equipment is prevented spouting in pit which characterized in that: including the rig and with the rig cooperation and stretch into the drilling rod mechanism to the coal seam, the drilling rod mechanism stretches out the one end overcoat on the coal seam and is equipped with the protecting tube, the protecting tube includes the high-pressure honeycomb duct of being connected with the hole sealing section of drilling and sets up and keeps away from the sleeve pipe that hole sealing section one end was used for protecting the rig at the high-pressure honeycomb duct, and the diameter of drill bit is less than the internal diameter of high-pressure honeycomb duct, form the drilling clearance with high-pressure honeycomb duct intercommunication between drilling rod mechanism and the drilling inner wall, be connected with the high-pressure back flow pipe that returns liquid mechanism intercommunication with drilling fluid pressurize on the high-pressure honeycomb duct, drilling fluid pressurize returns liquid mechanism include pressurize return liquid container, set up the pressurize piston in the pressurize return liquid container and set up the pressurize return liquid container side and with the hydrops pond that the pressurize return liquid container communicates, the space that the, the space of the pressure maintaining liquid return container, which is positioned on the upper side of the pressure maintaining piston, is a pressure maintaining liquid cavity, a liquid discharging liquid inlet pipe is arranged at the bottom of the pressure maintaining liquid return container, a liquid discharging and liquid feeding control valve is installed on the liquid discharging liquid inlet pipe, a first high-pressure exhaust pipe, a safety pressure relief valve and a pressure maintaining liquid inlet pipe are arranged at the top of the pressure maintaining liquid return container, a one-way valve is installed on the pressure maintaining liquid inlet pipe, a high-pressure air return hole is formed in the pressure maintaining piston, the high-pressure air return hole is communicated with the first high-pressure exhaust pipe through a second high-pressure exhaust pipe, an exhaust valve is installed on the first high-pressure exhaust pipe, a depth indicating rod extends into the pressure maintaining liquid;
the drill rod mechanism comprises an independent drill rod, a drill bit arranged on the front side of the independent drill rod and a connecting drill rod assembly arranged on the rear side of the independent drill rod, wherein the connecting drill rod assembly comprises N connecting drill rods which are sequentially connected, and N is a positive integer.
Foretell hole pressurize drilling equipment is prevented spouting in pit which characterized in that: independent drilling rod includes hollow structure's the body of rod and sets up spring catch platform and pressurize ball fender platform in the body of rod, and the space that spring catch platform and pressurize ball kept off between the platform forms logical sap cavity, lead to be provided with the pressurize spring in the sap cavity and keep off the ball with pressurize spring complex, the spring keep off the bench set up with lead to the spring catch platform limbers of sap cavity intercommunication, the pressurize ball keep off the bench set up with lead to the dwell ball of sap cavity intercommunication keep off the platform limbers, the spring keep off the one side that the platform setting is close to the drill bit in the body of rod, the drill bit passes through the pole head and is connected with the body of rod, the one end that the drill bit was kept away from to the body of rod is provided with the connecting.
Foretell hole pressurize drilling equipment is prevented spouting in pit which characterized in that: the connecting drill rod comprises an independent drill rod and a drill rod connector which is arranged at the front end of the independent drill rod and is of a hollow structure, a pressure maintaining ball ejector rod is arranged at the front end of the drill rod connector, and a drill rod head water hole communicated with the independent drill rod is formed in the pressure maintaining ball ejector rod.
Foretell hole pressurize drilling equipment is prevented spouting in pit which characterized in that: the high-pressure return pipe is communicated with the liquid discharge and liquid inlet pipe through a pressure maintaining liquid return pipe, and a return valve is installed on the high-pressure return pipe.
Foretell hole pressurize drilling equipment is prevented spouting in pit which characterized in that: the liquid storage tank is characterized in that a liquid discharge liquid outlet pipe is further arranged at the bottom of the pressure maintaining liquid return container, the pressure maintaining liquid return container is communicated with the liquid storage tank through the liquid discharge liquid outlet pipe, a liquid discharge liquid outlet control valve is installed on the liquid discharge liquid outlet pipe, and the height of the liquid discharge liquid outlet pipe is higher than that of the liquid discharge liquid inlet pipe.
Foretell hole pressurize drilling equipment is prevented spouting in pit which characterized in that: the outer diameter of the pressure maintaining ball is larger than the inner diameter of a water through hole of the pressure maintaining ball blocking table, the outer diameter of the pressure maintaining ball is larger than the inner diameter of a pressure maintaining spring, the outer diameter of the pressure maintaining spring is larger than the inner diameter of the water through hole of the spring blocking table, the outer diameter of a push rod of the pressure maintaining ball is smaller than the inner diameter of the water through hole of the pressure maintaining ball blocking table, and an inner thread is arranged on the inner wall of the connecting hole.
Foretell hole pressurize drilling equipment is prevented spouting in pit which characterized in that: and external threads are arranged outside the drill rod connector.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses an one end overcoat that stretches out the coal petrography at drilling rod mechanism is equipped with the protective tube, and the gas-liquid-solid mixture of drilling clearance backward flow is retrieved to the high pressure honeycomb duct in the protective tube to transmit to drilling fluid pressurize through the high pressure back flow and return liquid mechanism, effectively adjust the inside and outside pressure of drilling, hole sealing section one end is kept away from to the high pressure honeycomb duct and is provided with the sleeve pipe, realizes reducing the friction of drilling rod and high pressure honeycomb duct when sealed, convenient to popularize and use.
2. The utility model discloses the pressurize piston divides into stock solution chamber and pressurize sap cavity with pressurize return liquid container among the drilling fluid pressurize returns liquid mechanism, the pressurize sap cavity sets up pressurize sap cavity pressure through safe pressure relief valve, the inside and outside pressure of balanced drilling, avoid the inside and outside pressure imbalance of drilling, cause the orifice, set up high-pressure back vent on the pressurize piston, gas such as the gas of retrieving in the release stock solution chamber, utilize the hydrops pond to collect the liquid of retrieving in the stock solution chamber and deposit and retrieve solid brill bits thing, reciprocate to go on, realize pressurize drilling, safety and reliability, the shift position of degree of depth indicator pole visual display pressurize piston, avoid pressurize piston extrusion second high-pressure blast pipe, long service life, the operating condition in stock solution chamber still can be instructed simultaneously, and is good in effect.
3. The utility model relates to a novel reasonable, independent drilling rod and connecting drill rod all keep off the platform through setting up the spring and keep off the platform with the pressurize ball and keep off the platform and limit pressurize spring and pressurize ball in the body of rod, the spring keeps off the bench and has offered the spring and keep off the platform limbers, the ball keeps off the bench and has offered the ball fender platform limbers of pressurize, guarantee that the drilling fluid can pour into the coal seam smoothly, set up the pressurize ball in the body of rod one end of keeping away from the drill bit, when the rig creeps into, the rig pushes away the pressurize ball, make the ball keep off the platform separation of pressurize ball and pressurize ball, the drilling fluid gets into the liquid cavity and flows out the body of rod through the spring fender platform limbers through the ball fender platform limbers of pressurize ball fender through the ball, guarantee that the drilling fluid pours into smoothly, when moving back to the brill, the pressurize ball moves back to the ball keeps off the platform position department, the ball keeps off the, the drill rod connector on the connecting drill rod and the connecting hole in the previous section are in threaded fit with the pressure maintaining ball ejector rod on the front side of the drill rod connector to push the pressure maintaining ball in the previous section of drill rod, so that a hollow channel of the drill rod is ensured, the circulation of drilling fluid is facilitated, and the popularization and the use are facilitated.
To sum up, the utility model relates to a novel reasonable utilizes the drilling fluid pressurize to return the inside and outside pressure of liquid mechanism balance drilling to utilize high-pressure return pipe to return liquid mechanism to the drilling fluid pressurize and carry gas, liquid, the solid mixture that the drilling clearance flows back, connect the multisection through independent drilling rod and connect the drilling rod and constitute the drilling rod, realize the drilling pressurize, prevent the drilling fluid orifice, convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the independent drill rod of the present invention.
Fig. 3 is a schematic structural view of the connection drill rod of the present invention.
Description of reference numerals:
1-a drill bit; 2-independent drill pipe; 2-1-rod body;
2-club head; 2-3-spring block platform; 2-4-a water through hole of the spring blocking platform;
2-5-liquid through cavity; 2-6-pressure maintaining spring; 2-7-pressure maintaining ball;
2-8-pressure maintaining ball blocking table; 2-9-a water through hole of the pressure maintaining ball blocking table;
2-10-connecting hole; 3, connecting a drill rod; 3-1-pressure maintaining ball ejector rod;
3-2-drill rod connector; 3-drill rod head limber hole; 4, sealing the hole section;
5-high pressure honeycomb duct; 6-high pressure return pipe; 6-1-pressure maintaining liquid return pipe;
6-2-reflux valve; 7-drilling fluid pressure maintaining and returning mechanism;
7-1-a liquid storage cavity; 7-2-pressure maintaining liquid cavity; 7-3-pressure maintaining piston;
7-4-high pressure air return hole; 7-5-a second high-pressure exhaust pipe; 7-6 — a first high pressure exhaust pipe;
7-safety relief valve; 7-8-pressure maintaining liquid inlet pipe; 7-9-liquid discharging and feeding pipe;
7-10-liquid discharge and liquid outlet pipe; 7-11-liquid drainage and liquid inlet control valve;
7-12-liquid discharge control valve; 7-13-depth indicating rod;
7-14-pressure gauge; 7-15-exhaust valve; 7-16-liquid collecting tank;
7-17-one-way valve; 8, a drilling machine; 9-coal rock layer;
10-a sleeve; 11-drill hole clearance.
Detailed Description
As shown in fig. 1 to 3, the utility model comprises a drilling machine 8 and a drilling rod mechanism which is matched with the drilling machine 8 and extends into a coal rock layer 9, a protective pipe is sleeved outside one end of the drilling rod mechanism which extends out of the coal rock layer 9, the protective pipe comprises a high-pressure guide pipe 5 which is connected with a hole sealing section 4 of a drilling hole and a sleeve 10 which is arranged at one end of the high-pressure guide pipe 5 which is far away from the hole sealing section 4 and is used for protecting the drilling machine 8, the diameter of a drill bit 1 is smaller than the inner diameter of the high-pressure guide pipe 5, a drilling gap 11 which is communicated with the high-pressure guide pipe 5 is formed between the drilling rod mechanism and the inner wall of the drilling hole, a high-pressure return pipe 6 which is communicated with a drilling fluid return mechanism 7 is connected on the high-pressure guide pipe 5, the drilling fluid return mechanism 7 comprises a pressure maintaining liquid return container, a pressure maintaining piston 7-3 which is arranged in, the space of the pressure maintaining liquid return container, which is positioned at the lower side of the pressure maintaining piston 7-3, is a liquid storage cavity 7-1, the space of the pressure maintaining liquid return container, which is positioned at the upper side of the pressure maintaining piston 7-3, is a pressure maintaining liquid cavity 7-2, the bottom of the pressure maintaining liquid return container is provided with a liquid drainage liquid inlet pipe 7-9, a liquid drainage liquid inlet control valve 7-11 is installed on the liquid drainage liquid inlet pipe 7-9, the top of the pressure maintaining liquid return container is provided with a first high-pressure exhaust pipe 7-6, a safety pressure relief valve 7-7 and a pressure maintaining liquid inlet pipe 7-8, a one-way valve 7-17 is installed on the pressure maintaining liquid inlet pipe 7-8, a high-pressure air return hole 7-4 is formed on the pressure maintaining piston 7-3, and the high-pressure air return hole 7-4, an exhaust valve 7-15 is mounted on the first high-pressure exhaust pipe 7-6, a depth indicating rod 7-13 extends into the pressure maintaining liquid return container and is connected with a pressure maintaining piston 7-3, and a pressure gauge 7-14 is mounted at the top of the depth indicating rod 7-13;
the drill rod mechanism comprises an independent drill rod 2, a drill bit 1 arranged on the front side of the independent drill rod 2 and a connecting drill rod component arranged on the rear side of the independent drill rod 2, wherein the connecting drill rod component comprises N connecting drill rods 3 which are sequentially connected, and N is a positive integer.
It should be noted that a protective pipe is sleeved outside one end of the drill rod mechanism extending out of the coal rock layer 9, a high-pressure guide pipe 5 in the protective pipe recovers a gas, liquid and solid mixture flowing back from a drill hole gap and transmits the gas, liquid and solid mixture to a drilling fluid pressure maintaining and returning mechanism 7 through a high-pressure return pipe 6, the pressure inside and outside the drill hole is effectively adjusted, and a sleeve 10 is arranged at one end of the high-pressure guide pipe 5, which is far away from a hole sealing section 4, so that the friction between the independent drill rod 2 and the high-pressure guide pipe; the pressure maintaining piston 7-3 in the drilling fluid pressure maintaining and liquid returning mechanism 7 divides a pressure maintaining and liquid returning container into a liquid storage cavity 7-1 and a pressure maintaining liquid cavity 7-2, the pressure maintaining liquid cavity 7-2 is provided with the pressure of the pressure maintaining liquid cavity 7-2 through a safety pressure relief valve 7-7 to balance the pressure inside and outside a drilled hole, so as to avoid the pressure unbalance inside and outside the drilled hole and cause a jet hole, a high-pressure air returning hole 7-4 is arranged on the pressure maintaining piston 7-3 to release the gas recovered in the liquid storage cavity 7-1, the liquid recovered in the liquid storage cavity 7-1 is collected by a liquid accumulating tank 7-16 to perform reciprocating motion to realize pressure maintaining and drilling, the pressure maintaining and the drilling are safe and reliable, the moving position of the pressure maintaining piston 7-3 is visually displayed by a depth indicating rod 7-13, the pressure maintaining piston 7-3 is prevented from extruding a second high-pressure exhaust pipe, the effect is good, and the diameter of the drill bit 1 is smaller than the inner diameter of the high-pressure guide pipe 5, so that the drill bit 1 can be taken out conveniently.
In the embodiment, the independent drill rod 2 comprises a hollow rod body 2-1, and a spring baffle table 2-3 and a pressure maintaining ball baffle table 2-8 which are arranged in the rod body 2-1, the space between the spring baffle table 2-3 and the pressure maintaining ball baffle table 2-8 forms a liquid through cavity 2-5, a pressure maintaining spring 2-6 and a pressure maintaining ball 2-7 matched with the pressure maintaining spring 2-6 are arranged in the liquid through cavity 2-5, a spring baffle table water through hole 2-4 communicated with the liquid through cavity 2-5 is arranged on the spring baffle table 2-3, a pressure maintaining ball baffle table water through hole 2-9 communicated with the liquid through cavity 2-5 is arranged on the pressure maintaining ball baffle table 2-8, the spring baffle table 2-3 is arranged on one side of the rod body 2-1 close to the drill bit 1, the drill bit 1 is connected with the rod body 2-1 through a rod head 2-2, one end of the rod body 2-1, which is far away from the drill bit 1, is provided with a connecting hole 2-10 communicated with a water through hole 2-9 of the pressure maintaining ball retaining table.
In the embodiment, the connecting drill rod 3 comprises an independent drill rod 2 and a hollow drill rod connector 3-2 arranged at the front end of the independent drill rod 2, a pressure maintaining ball ejector rod 3-1 is arranged at the front end of the drill rod connector 3-2, and a drill rod head water through hole 3-3 communicated with the independent drill rod 2 is formed in the pressure maintaining ball ejector rod 3-1.
The pressure maintaining spring 2-6 and the pressure maintaining ball 2-7 are limited in the rod body 2-1 by arranging the spring retaining table 2-3 and the pressure maintaining ball retaining table 2-8, a spring retaining table water through hole 2-4 is formed in the spring retaining table 2-3, and a pressure maintaining ball retaining table water through hole 2-9 is formed in the pressure maintaining ball retaining table 2-8, so that drilling fluid can be smoothly poured into a drilled hole; the pressure-maintaining ball 2-7 is arranged at one end of the rod body 2-1 far away from the drill bit 1, when the drilling machine 8 drills, the drilling machine 8 is matched with a pressure-maintaining ball ejector rod 3-1 to push the pressure-maintaining ball 2-7, so that the pressure-maintaining ball 2-7 is separated from a pressure-maintaining ball baffle table 2-8, drilling fluid enters a fluid through cavity 2-5 through a water through hole 2-9 of the pressure-maintaining ball baffle table and flows out of the rod body 2-1 through a water through hole 2-4 of a spring baffle table, smooth filling of the drilling fluid is ensured, when the drilling is retreated, the pressure-maintaining ball 2-7 returns to the position of the pressure-maintaining ball baffle table 2-8, the water through hole 2-9 of the pressure-maintaining ball baffle table is blocked, the pressure maintaining of the drilling hole is; when one section of connecting drill rod 3 is connected, a drill rod connector 3-2 on the connecting drill rod 3 is in threaded fit with a connecting hole 2-10 in the previous section, and a pressure maintaining ball ejector rod 3-1 on the front side of the drill rod connector 3-2 pushes a pressure maintaining ball 2-7 in the previous section of drill rod, so that a hollow channel of the drill rod is ensured, and the circulation of drilling fluid is facilitated.
In this embodiment, the high-pressure return pipe 6 is communicated with the liquid discharge and inlet pipe 7-9 through the pressure maintaining return pipe 6-1, the return valve 6-2 is installed on the high-pressure return pipe 6, the return valve 6-2 is normally open, and the return valve 6-2 is closed when the pressure maintaining return pipe 6-1 is replaced.
In this embodiment, the bottom of the pressure maintaining liquid returning container is further provided with a liquid discharging and discharging pipe 7-10, the pressure maintaining liquid returning container is communicated with the liquid accumulating pool 7-16 through the liquid discharging and discharging pipe 7-10, a liquid discharging and discharging control valve 7-12 is installed on the liquid discharging and discharging pipe 7-10, and the height of the liquid discharging and discharging pipe 7-10 is higher than that of the liquid discharging and discharging pipe 7-9.
It should be noted that the height of the discharged liquid outlet pipe 7-10 is higher than the height of the discharged liquid inlet pipe 7-9, so as to keep a certain volume of liquid remaining in the pressure maintaining liquid return container, avoid the liquid from completely flowing into the liquid accumulation tank 7-16 through the discharged liquid outlet pipe 7-10 to be emptied, limit the downward moving position of the pressure maintaining piston 7-3, and avoid the pressure maintaining piston 7-3 from moving downward to the bottom of the pressure maintaining liquid return container to block the discharged liquid inlet pipe 7-9, which leads to the pressure maintaining failure of the drilling fluid pressure maintaining liquid return mechanism 7.
In the embodiment, the outer diameter of the pressure retaining ball 2-7 is larger than the inner diameter of the pressure retaining ball baffle table water through hole 2-9, so as to ensure the effective blocking limit of the pressure retaining ball 2-7 by the pressure retaining ball baffle table 2-8, the outer diameter of the pressure retaining ball 2-7 is larger than the inner diameter of the pressure retaining spring 2-6, so as to ensure the effective extrusion of the pressure retaining ball 2-7 and the pressure retaining spring 2-6, the outer diameter of the pressure retaining spring 2-6 is larger than the inner diameter of the spring baffle table water through hole 2-4, so as to ensure the effective blocking limit of the pressure retaining spring 2-6 by the spring baffle table 2-3, the outer diameter of the pressure retaining ball ejector rod 3-1 is smaller than the inner diameter of the ball baffle table water through hole 2-9, so as to facilitate the pressure retaining ball ejector rod 3-1 to extend into the pressure retaining ball baffle table water through hole 2, in practical use, the length of the pressure maintaining ball ejector rod 3-1 can ensure that the pressure maintaining ball 2-7 is ejected away from the pressure maintaining ball baffle table 2-8, and the inner wall of the connecting hole 2-10 is provided with an internal thread.
In the embodiment, the drill rod connector 3-2 is externally provided with external threads which are convenient to match with the internal threads on the inner wall of the hole of the connecting hole 2-10.
When the utility model is used, the drilling machine 8 and the drill rod mechanism which is matched with the drilling machine 8 and extends into the coal rock layer 9 are utilized to drill at the design position according to the design azimuth angle and the design inclination angle until the drilling depth reaches the design depth which is equal to the length of the hole sealing section 4, and the length of the drill rod mechanism is not less than the length of the hole sealing section 4;
the rear side of the drill rod mechanism is provided with a connecting drill rod 3, the drill rod mechanism is extended, when the length of the drill rod mechanism is equal to the sum of the lengths of the hole sealing section 4, the high-pressure flow guide pipe 5 and the sleeve 10, the high-pressure flow guide pipe 5 is sleeved at one end of the drill rod mechanism, which extends out of the coal rock layer 9, and is in sealing connection with the hole sealing section 4, and the sleeve 10 is arranged at one end, which is far away from the hole sealing section 4, of the high-pressure flow guide pipe;
according to the formula P ═ kP1Obtaining a pressure maintaining pressure value P, wherein k is a safety factor, P1Compensating the radial stress value of the formation pressure for the drilling fluid;
injecting pressure maintaining liquid from a pressure maintaining liquid inlet pipe 7-8, enabling the pressure maintaining liquid to enter a pressure maintaining liquid cavity 7-2 through a one-way valve 7-17 to push a pressure maintaining piston 7-3, enabling the pressure maintaining piston 7-3 to move downwards, enabling gas in a liquid storage cavity 7-1 to be discharged to a waste gas recovery system through a high-pressure air return hole 7-4 in the pressure maintaining piston 7-3, a second high-pressure exhaust pipe 7-5 and a first high-pressure exhaust pipe 7-6 until the position of a depth indicating rod 7-13 does not move any more and a pressure value displayed by a pressure gauge 7-14 is unchanged, stopping injecting the pressure maintaining liquid, and completing the exhaust of the liquid storage cavity 7-1;
adjusting the pressure value of the safety relief valve 7-7 to be a pressure maintaining pressure value P, and monitoring the pressure maintaining pressure value in the pressure maintaining liquid cavity 7-2 in real time through a pressure gauge 7-14; a new section of connecting drill rod 3 is connected behind the drill rod mechanism, the drill rod mechanism is updated, drilling fluid with pressure P is injected into the updated drill rod mechanism through a drilling machine 8, the drilling fluid passes through connecting holes 2-10 in the new connecting drill rod 3 and a water through hole 2-9 of a pressure maintaining ball baffle table, a pressure maintaining ball 2-7 in the previous section of drill rod is pushed by a pressure maintaining ball top rod 3-1 on the front side of the connecting drill rod 3, the pressure maintaining ball 2-7 is pushed to compress a pressure maintaining spring 2-6, the pressure maintaining ball 2-7 leaves the pressure maintaining ball baffle table 2-8, the drilling fluid passes through a gap between the pressure maintaining ball 2-7 and a liquid through cavity 2-5, then enters the previous section of drill rod through a water through hole 2-4 of a spring baffle table and a rod head 2-2, until the drilling fluid is conveyed to a drill bit 1 to enter a coal rock stratum 9, and drilling fluid mixed gas and drilling cuttings, the drilling fluid flows back to the high-pressure flow guide pipe 5 and enters the liquid storage cavity 7-1 through the high-pressure return pipe 6, the pressure in the liquid storage cavity 7-1 is continuously increased along with the backflow of the drilling fluid mixed gas and the drilling cuttings, the pressure maintaining piston 7-3 is pushed to move upwards, when the pressure in the pressure maintaining liquid cavity 7-2 is larger than the pressure maintaining pressure value P, the safety pressure relief valve 7-7 is opened, the drilling fluid mixed drilling cuttings in the liquid storage cavity 7-1 keep the pressure maintaining pressure value P to push the pressure maintaining piston 7-3 to move upwards continuously, and pressure maintaining drilling is achieved;
the drilling machine 8 retreats after stopping drilling, high-pressure drilling fluid flows back, the pressure maintaining springs 2-6 push the pressure maintaining balls 2-7 to reset, the pressure maintaining balls 2-7 abut against the pressure maintaining ball baffle table 2-8 to block the water through holes 2-9 of the pressure maintaining ball baffle table, and the drill rod mechanism realizes drill stopping and pressure maintaining to seal the drill rod; simultaneously closing a discharged liquid inlet control valve 7-11, adopting the liquid storage cavity exhaust process to exhaust gas brought by well-drilling liquid mixed drilling cuttings, closing an exhaust valve 7-15 after the exhaust is finished, opening a discharged liquid outlet control valve 7-12, filling pressure maintaining liquid into a pressure maintaining liquid cavity 7-2, pushing a pressure maintaining piston 7-3 to move downwards by the pressure maintaining liquid, enabling the drilling liquid mixed drilling cuttings in the liquid storage cavity 7-1 to flow into a liquid accumulation tank 7-16 through a discharged liquid outlet pipe 7-10, then connecting a new section of connecting drill rod 3 to drill holes, perform pressure maintaining drilling, exhaust and liquid discharge, and so on to realize continuous pressure maintaining drilling of a coal rock layer 9; when the drill rod withdrawing mechanism withdraws the drill, drilling fluid is continuously injected into the drill hole, and the drill is withdrawn at the same time, so that the pressure in the drill hole is prevented from suddenly dropping, and the pressure maintaining and drill withdrawal are realized.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (7)
1. The utility model provides a hole pressurize drilling equipment is prevented spouting in pit which characterized in that: including rig (8) and with rig (8) cooperation just stretches into the drilling rod mechanism to coal seam (9), drilling rod mechanism stretches out the one end overcoat of coal seam (9) and is equipped with the protecting tube, the protecting tube includes high-pressure honeycomb duct (5) of being connected with the hole sealing section (4) of drilling and sets up and keeps away from sleeve pipe (10) that hole sealing section (4) one end is used for reducing drilling rod friction and sealed drilling rod in high-pressure honeycomb duct (5), and the diameter of drill bit (1) is less than the internal diameter of high-pressure honeycomb duct (5), form drilling clearance (11) with high-pressure honeycomb duct (5) intercommunication between drilling rod mechanism and the drilling inner wall, be connected with on high-pressure honeycomb duct (5) and return high-pressure back flow (6) that liquid mechanism (7) communicate with drilling fluid pressurize return, drilling fluid return mechanism (7) are including pressurize return liquid container, set up pressurize piston (7-3) and setting in the pressurize return liquid container are in the pressurize return liquid container side and the liquid accumulation pool (7-16) is communicated with the pressure-maintaining liquid return container, the space of the pressure-maintaining liquid return container, which is positioned on the lower side of the pressure-maintaining piston (7-3), is a liquid storage cavity (7-1), the space of the pressure-maintaining liquid return container, which is positioned on the upper side of the pressure-maintaining piston (7-3), is a pressure-maintaining liquid cavity (7-2), the bottom of the pressure-maintaining liquid return container is provided with a liquid drainage liquid inlet pipe (7-9), a liquid drainage liquid inlet control valve (7-11) is installed on the liquid drainage liquid inlet pipe (7-9), the top of the pressure-maintaining liquid return container is provided with a first high-pressure exhaust pipe (7-6), a safety pressure relief valve (7-7) and a pressure inlet pipe (7-8), a one-way valve (7-17) is installed on the pressure-maintaining liquid inlet pipe (7-8), and, the high-pressure air return hole (7-4) is communicated with the first high-pressure exhaust pipe (7-6) through the second high-pressure exhaust pipe (7-5), an exhaust valve (7-15) is installed on the first high-pressure exhaust pipe (7-6), the depth indicating rod (7-13) extends into the pressure maintaining liquid return container to be connected with the pressure maintaining piston (7-3), and the top of the depth indicating rod (7-13) is provided with a pressure gauge (7-14);
the drill rod mechanism comprises an independent drill rod (2), a drill bit (1) arranged on the front side of the independent drill rod (2) and a connecting drill rod component arranged on the rear side of the independent drill rod (2), wherein the connecting drill rod component comprises N connecting drill rods (3) which are sequentially connected, and N is a positive integer.
2. The downhole blowout prevention hole pressure maintaining drilling equipment according to claim 1, wherein: the independent drill rod (2) comprises a hollow-structure rod body (2-1) and a spring baffle table (2-3) and a pressure maintaining ball baffle table (2-8) which are arranged in the rod body (2-1), a liquid through cavity (2-5) is formed in the space between the spring baffle table (2-3) and the pressure maintaining ball baffle table (2-8), a pressure maintaining spring (2-6) and a pressure maintaining ball (2-7) matched with the pressure maintaining spring (2-6) are arranged in the liquid through cavity (2-5), a spring baffle table water through hole (2-4) communicated with the liquid through cavity (2-5) is formed in the spring baffle table (2-3), a pressure maintaining ball baffle table water through hole (2-9) communicated with the liquid through cavity (2-5) is formed in the pressure maintaining ball baffle table (2-8), and the spring baffle table (2-3) is arranged on one side, close to the drill bit (1), of the rod body (2-1), the drill bit (1) is connected with the rod body (2-1) through the rod head (2-2), and one end, far away from the drill bit (1), of the rod body (2-1) is provided with a connecting hole (2-10) communicated with a water through hole (2-9) of the pressure maintaining ball blocking table.
3. The downhole blowout prevention hole pressure maintaining drilling equipment according to claim 2, wherein: the connecting drill rod (3) comprises an independent drill rod (2) and a drill rod connector (3-2) which is arranged at the front end of the independent drill rod (2) and is of a hollow structure, a pressure maintaining ball ejector rod (3-1) is arranged at the front end of the drill rod connector (3-2), and a drill rod head water hole (3-3) communicated with the independent drill rod (2) is formed in the pressure maintaining ball ejector rod (3-1).
4. The downhole blowout prevention hole pressure maintaining drilling equipment according to claim 1, wherein: the high-pressure return pipe (6) is communicated with the liquid discharge and liquid inlet pipe (7-9) through a pressure maintaining liquid return pipe (6-1), and a return valve (6-2) is installed on the high-pressure return pipe (6).
5. The downhole blowout prevention hole pressure maintaining drilling equipment according to claim 1, wherein: the liquid level meter is characterized in that a liquid drainage and liquid outlet pipe (7-10) is further arranged at the bottom of the pressure maintaining liquid return container, the pressure maintaining liquid return container is communicated with a liquid accumulation pool (7-16) through the liquid drainage and liquid outlet pipe (7-10), a liquid drainage and liquid outlet control valve (7-12) is mounted on the liquid drainage and liquid outlet pipe (7-10), and the height of the liquid drainage and liquid outlet pipe (7-10) is higher than that of the liquid drainage and liquid inlet pipe (7-9).
6. A downhole blowout prevention hole pressure maintaining drilling equipment according to claim 3, wherein: the outer diameter of the pressure maintaining ball (2-7) is larger than the inner diameter of the pressure maintaining ball blocking platform water through hole (2-9), the outer diameter of the pressure maintaining ball (2-7) is larger than the inner diameter of the pressure maintaining spring (2-6), the outer diameter of the pressure maintaining spring (2-6) is larger than the inner diameter of the spring blocking platform water through hole (2-4), the outer diameter of the pressure maintaining ball ejector rod (3-1) is smaller than the inner diameter of the pressure maintaining ball blocking platform water through hole (2-9), and an inner thread is arranged on the inner wall of the connecting hole (2-10).
7. A downhole blowout prevention hole pressure maintaining drilling equipment according to claim 3, wherein: external threads are arranged outside the drill rod connector (3-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020336245.2U CN211900525U (en) | 2020-03-16 | 2020-03-16 | Prevent orifice pressurize drilling equipment in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020336245.2U CN211900525U (en) | 2020-03-16 | 2020-03-16 | Prevent orifice pressurize drilling equipment in pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211900525U true CN211900525U (en) | 2020-11-10 |
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ID=73323151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020336245.2U Expired - Fee Related CN211900525U (en) | 2020-03-16 | 2020-03-16 | Prevent orifice pressurize drilling equipment in pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211900525U (en) |
-
2020
- 2020-03-16 CN CN202020336245.2U patent/CN211900525U/en not_active Expired - Fee Related
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Granted publication date: 20201110 |