CN114033315A - Drilling tool in outburst coal seam shield pressure relief hole and hole outer sealing system thereof - Google Patents
Drilling tool in outburst coal seam shield pressure relief hole and hole outer sealing system thereof Download PDFInfo
- Publication number
- CN114033315A CN114033315A CN202111345667.1A CN202111345667A CN114033315A CN 114033315 A CN114033315 A CN 114033315A CN 202111345667 A CN202111345667 A CN 202111345667A CN 114033315 A CN114033315 A CN 114033315A
- Authority
- CN
- China
- Prior art keywords
- hole
- sieve
- flow supply
- sieve pore
- drill rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The invention discloses an in-hole drilling tool for shield pressure relief of a protruding coal seam and an out-hole sealing system thereof, wherein the in-hole drilling tool comprises a sieve pore drill bit, a plurality of sieve pore drill rods and a plurality of flow supply pipes, and the out-hole sealing system comprises a hole sealing dustproof assembly and a sliding type inner sealing pipe; the outer diameter of the sieve pore drill rod is close to the diameter of the drill bit, and the outer wall of the sieve pore drill rod has a shield effect on the drilled hole; the outer surface of the sieve pore drill rod is provided with a spiral groove or a spiral convex rib or a plane, the slag discharging sieve pores are arranged along the spiral groove or the spiral convex rib or the plane, and the slag discharging sieve pores have a pressure relief effect on the drill rod; the hole sealing dustproof assembly and the sliding type inner closed pipe are used for sealing exposed sieve holes of the sieve hole drill rod outside the holes to prevent gas flow, water flow or dust from leaking out through the sieve holes, and the sliding type inner closed pipe also has the functions of righting and positioning the flow supply pipe. The drilling tool in the hole can be used for straight drilling or directional drilling, and once the inner slag discharge channel is blocked, the inner slag discharge channel can be dredged by rotating the flow supply pipe.
Description
Technical Field
The invention relates to the technical field of drilling of coal mine gas extraction boreholes, in particular to an in-hole drilling tool for shield pressure relief of a outburst coal seam and an out-hole sealing system thereof, which are used for construction of gas extraction boreholes of the outburst coal seam and a soft and hard composite coal seam, and the drilling tool can be used for straight drilling and cableless directional straight hole drilling.
Background
Three problems to be solved exist in the construction of the gas extraction drill hole of the outburst coal seam: firstly, drilling spray holes, wherein due to the fact that dynamic phenomena such as coal cannons in holes generally occur in the outburst coal seam drilling process, the walls of the drill holes are very easy to collapse and collapse, intermittent blockage of an outer discharge slag channel is caused, intermittent blockage and dredging of the outer discharge slag channel can cause gas of the spray holes to exceed the limit, incomplete statistics is carried out, and the gas exceeding caused by outburst coal seam drilling of the spray holes accounts for 60% -80% of the total gas exceeding times; secondly, the drill hole is seriously deviated, because the external slag discharge channel needs enough geometric space, the diameter of the drill rod is 20mm to 50mm smaller than that of the drill bit, the deviation distance of the hectometer drill hole is as high as 15m to 20m, and the final hole position is generally on the top plate or the bottom plate of the coal bed; and thirdly, the drilling depth is limited, and the drilling depth is limited due to factors such as hole collapse of the drill hole, blockage of an outer slag discharge channel, drill hole deflection and the like.
In order to solve the problem of drilling a prominent coal seam, the applicant successively proposed a drilling concept of hole protection and pressure relief after 2013 and designs a plurality of dual-channel sieve pore drill rods with patent numbers of ZL201310568692.5, ZL201810488587.3 and ZL201810488034.8, wherein flow supply pipes of the dual-channel sieve pore drill rods are coaxially fixed with an outer rod body through supporting devices, a slag discharge channel is an annular inner slag discharge channel between the flow supply pipe and the outer rod body, and the drill rods have the function of shielding and pressure relief on the surrounding rock of a drilled hole, but certain defects also exist in the aspects of structure and use, and the four defects are mainly embodied as follows: firstly, the inner pipe and the outer pipe of the drill rod are coaxially fixed at two ends of the inner pipe through the supporting devices, the requirement on the coaxiality of the outer pipe and the inner pipe is high, the supporting devices have a blocking effect on the coal cinder migration of the deslagging channel, the deslagging of the inner deslagging channel is not favorable, and the blocking probability of the inner deslagging channel is increased; secondly, the inner slag discharging channel is an annular slag discharging channel between the inner surface of the outer rod body and the outer surface of the flow supply pipe, the minimum geometric dimension of the annular slag discharging channel is reduced by times compared with the geometric dimension of the slag discharging channel with a circular through diameter, so that the size of a slag inlet of a sieve pore on the outer rod body is also reduced by times, the slag discharging pressure relief efficiency is influenced due to the fact that the size of the slag discharging sieve pore is too small, and the probability that the drill rod is locked is increased; thirdly, as the outer rod body of the drill rod and the central flow supply pipe are fixed into an integral structure, the drill rod has no disturbance crushing function on the coal cinder entering the inner slag discharge channel, and the coal cinder is easy to bridge and block in the annular slag discharge channel with smaller size; fourthly, for the soft outburst coal seam, the drilled holes are easy to collapse and block after the drill is lifted, so that the extraction effect is reduced, when the drill is lifted in a plurality of mining areas, the hole protecting sieve tube is arranged in the drilled holes through the through holes in the centers of the drill rods, and if the fixed type sieve hole drill rod with the center for supplying flow is adopted, the hole protecting sieve tube cannot be arranged in the drilled holes due to the obstruction of the supporting device.
Disclosure of Invention
The invention aims to solve the existing problems and provides an in-hole drilling tool for shield pressure relief of a outburst coal seam and an out-hole sealing system thereof, aiming at solving the problem of drilling and spraying holes on the outburst coal seam and improving the straightness, depth and quality of the drilled holes.
The technical scheme adopted for achieving the purpose is as follows:
a drilling tool in a shield pressure relief hole of an outburst coal seam comprises sieve pore drill bits, a plurality of sieve pore drill rods and a plurality of flow supply pipes, wherein a plurality of slag relief sieve pores penetrating through the wall thickness of a rod body are arranged on the outer walls of the sieve pore drill rods; the first flow supply pipe is connected to the rotary flow supply short joint of the sieve pore drill bit, the flow supply pipe at the rear end is inserted in the sliding inner closed pipe, and the sliding inner closed pipe is inserted in the inner hole of the sieve pore drill rod outside the drilling hole.
Further, the sieve mesh drill bit comprises a drill bit shell, one end of the drill bit shell is provided with a screw thread connected with a sieve mesh drill rod, the other end of the drill bit shell is provided with a flow outlet hole, a rotary flow supply short section is rotatably installed in the drill bit shell along the axial direction of the sieve mesh drill rod, one end of the rotary flow supply short section is communicated with the flow outlet hole, and the other end of the rotary flow supply short section is connected with a flow supply pipe; the drill bit shell is provided with a spiral groove and a sieve pore; and a support frame is arranged between the rotary flow supply short joint and the drill bit shell.
Furthermore, both ends of the sieve pore drill rod are provided with a male buckle and a female buckle, the outer surface of the sieve pore drill rod is provided with a spiral groove or a spiral convex rib or an axial plane, and the slag discharge sieve pore is arranged along the spiral groove or the spiral convex rib or the axial plane. The central line of the slag discharging sieve pore points to the circle center of the cross section of the sieve pore drill rod or deviates to the rotating direction of the sieve pore drill rod, and the slag discharging sieve pore is a round hole, a reducing round hole or a combined hole. The structural forms and parameter quantity of the spiral grooves on the outer surfaces of the sieve pore drill rods and the slag discharge sieve pores are set according to the requirements of optimization design according to the sizes of the sieve pore drill rods, the strength of steel used and the geological conditions of coal beds. In order to improve the slag gathering and crushing effects on the outer surface of the drill rod, the outer surface of the sieve pore drill rod is provided with axial convex ribs or axial grooves.
Furthermore, a male buckle and a female buckle are arranged at two ends of the flow supply pipe and are used for being connected with the flow supply short section of the sieve pore drill bit and the adjacent flow supply pipe; in order to improve the internal disturbance slag crushing and slag conveying functions of the drill rod, the outer surface of the flow supply pipe is provided with a spiral groove or a spiral convex rib or a spiral blade or an axial convex rib.
Furthermore, any connecting device is not arranged between the flow supply pipe in the drill hole and the sieve hole drill rod in the drill hole, torque can be applied to the flow supply pipe to enable the flow supply pipe and the sieve hole drill rod to rotate relatively, and the spiral groove or the spiral convex rib on the outer surface of the flow supply pipe is utilized to dredge the inner slag discharge channel under the condition that the inner slag discharge channel is accidentally blocked.
The sealing system comprises a hole sealing dustproof assembly arranged at a drilling opening and a sliding type inner sealing pipe inserted into an inner hole of a sieve pore drilling rod outside the drilling opening. The hole sealing dustproof assembly comprises a hole sealing device and a dustproof portion, the hole sealing device comprises a hole sealing pipe arranged at a drilling opening, the outer wall of the hole sealing pipe is wrapped by a single bag and inserted into the drilling opening, the dustproof portion comprises an installation barrel and a dustproof brush arranged on the inner wall of the installation barrel, the hole sealing pipe is connected with the installation barrel into a whole, the installation barrel is located outside the drilling opening, a sieve mesh drill rod penetrates through a center hole of the hole sealing pipe and a center hole of the installation barrel respectively, and the dustproof brush is in contact fit with the sieve mesh drill rod.
Furthermore, the sliding inner closed pipe comprises an outer pipe, an inner pipe and a support, wherein the support enables the outer pipe and the inner pipe to keep coaxial, the outer diameter of the outer pipe is equal to or smaller than the inner diameter of the sieve pore drill rod, and the inner diameter of the inner pipe is equal to or larger than the outer diameter of the flow supply pipe.
Further, the sliding inner closed pipe is inserted into an inner hole of the sieve pore drill rod, and an outer pipe of the sliding inner closed pipe closes a slag discharge sieve pore exposed out of the sieve pore drill rod outside the drilled hole; the flow supply pipe is inserted into the inner pipe of the sliding inner closed pipe, and the flow supply pipe and the sieve mesh drill rod are coaxially arranged. The length of the sliding type inner closed pipe is equal to or greater than the sum of the length of a drill guide rail and the distance between a drill front holder and the wall of the roadway.
In order to facilitate the loading and unloading of the flow supply pipe, the tail part of the flow supply pipe can be exposed out of the tail part of the sieve mesh drill rod for a certain distance after the sieve mesh drill rods are butted.
When the drilling machine clamps the sieve mesh drill rod to drill, the flow supply pipe and the sieve mesh drill rod can synchronously rotate and can also asynchronously rotate.
The invention has the following beneficial effects:
1. the floating type flow supply pipe of the drilling tool does not need to be coaxially and fixedly installed with the sieve pore drill rod, a supporting device is omitted, the processing technology is simple, the manufacturing cost is reduced, and compared with the fixed type central flow supply sieve pore drill rod, the drilling tool avoids the blocking effect of the flow supply pipe supporting device on the migration of the coal cinder in the internal slag discharge channel.
2. The flow supply pipe of the drilling tool can float in the center of the drill rod, the section of the inner slag discharge channel dynamically changes, the bridging and blockage of the slag discharge and slag discharge channel in the drill rod caused by coal slag can be avoided, the diameter of a slag discharge sieve pore can be larger, and the slag discharge effect of the sieve pore is better.
3. The floating type flow supply pipe of the drilling tool has disturbance crushing effect on large-diameter coal slag particles in the drill rod slag discharge channel, so that the slag discharge of fluid is more smooth; when the slag discharge channel in the drill rod is accidentally blocked, torque can be applied to the flow supply pipe to enable the flow supply pipe and the sieve mesh drill rod to rotate relatively, the blocked section is dredged by utilizing the spiral conveying function of the spiral groove or the spiral convex rib on the outer surface of the flow supply pipe, and the flow supply pipe can also be dredged by short-distance reciprocating drawing and inserting.
4. The support device is not arranged between the flow supply pipe of the drilling tool and the sieve pore drill rod, so that the exposed sieve pores of the drill rod can be more favorably sealed in the hole opening, and the slag discharge wind flow or water flow can be prevented from escaping.
5. The method is easier to realize that the hole protecting screen pipe is downwards drilled through the inner hole of the drilling tool.
Drawings
FIG. 1 is a schematic view of a screen hole drill of the drilling tool of the present invention
FIG. 2 is a schematic view of a structure of a mesh drill rod of the drilling tool of the present invention;
FIG. 3 is a schematic view of a flow supply configuration of the drilling tool of the present invention;
FIG. 4 is a schematic view of the construction and connection of the drilling tool of the present invention;
FIG. 5 is a schematic structural view of a hole sealing dustproof assembly of the drilling tool of the present invention;
FIG. 6 is a schematic view of a sliding inner closed tube structure of the drilling tool of the present invention;
FIG. 7 is a schematic view of the overall construction of the drilling tool and the downhole closure system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a mesh drill bit of a drilling tool in a shield pressure relief hole of a protruding coal seam, the mesh drill bit 1 comprises a bit housing 11, a support frame 12 and a rotatable flow supply nipple 13, the support frame 12 is coaxially fixed with the bit housing 11, the rotatable flow supply nipple 13 passes through a central hole of the support frame 12 and is coaxially arranged with the bit housing 11, and the rotatable flow supply nipple 13 can freely rotate in the support frame 12; the drill bit shell 11 is provided with a spiral groove 14, an axial sieve pore 15, a radial sieve pore 16 and an outflow hole 17, and the tail part of the drill bit shell 11 is provided with a female buckle for connecting with a sieve pore drill rod; one end of the rotary flow supply short section 13 leads to the outflow hole 17 at the terminal of the sieve pore drill bit 1, and the other end of the rotary flow supply short section 13 is provided with a female buckle for connecting with a flow supply pipe.
Fig. 2 is a schematic structural view of a sieve pore drill rod 2 of the drilling tool, wherein a male buckle and a female buckle are arranged at two ends of the sieve pore drill rod 2 and are used for being connected with a sieve pore drill bit 1 and adjacent sieve pore drill rods 2; the outer surface of the sieve pore drill rod 2 is provided with a spiral groove 21 or a spiral convex rib or an axial plane, and a slag discharging sieve pore 22 penetrating through the wall thickness of the drill rod is arranged along the spiral groove 21 or the spiral convex rib or the axial plane; the central line of the slag discharging sieve pore 22 points to the circle center of the cross section of the sieve pore drill rod 2 or the rotating direction of the sieve pore drill rod 2, and the slag discharging sieve pore 22 is a round hole, a reducing round hole or a combined hole. The appearance structure of the sieve pore drill rod 22, the parameters, the number and the like of the spiral groove 21 and the slag discharge sieve pores 22 are optimally designed according to the size of the slag discharge sieve pores 22, the strength of the steel used and the geological conditions of the coal bed.
Fig. 3 is a schematic view of a flow supply pipe structure of the drilling tool of the present invention, wherein a male buckle 31 and a female buckle 32 are arranged at two ends of the flow supply pipe 3 for connecting with the sieve pore drill bit 1 and connecting with two adjacent flow supply pipes 3; in order to improve the internal disturbance slag breaking and slag transporting functions of the drill rod, the outer surface of the flow supply pipe 3 can be provided with a spiral groove 33 or a spiral convex rib or a spiral blade or an axial convex rib, the shape and the number of the spiral groove 33 or the spiral convex rib or the spiral blade or the axial convex rib on the outer surface of the flow supply pipe are not limited by the embodiment, and the flow supply pipe can be in the shape of a round pipe, a polygonal pipe and the like.
Fig. 4 is a schematic view of the structure and connection of the drilling tool of the present invention, the drilling tool in the hole includes a sieve pore drilling bit 1, a plurality of sieve pore drilling rods 2 and a plurality of flow supply pipes 3, the sieve pore drilling bit 1 and the first sieve pore drilling rod 2 are connected by screw threads, the subsequent sieve pore drilling rod 2 and the sieve pore drilling rod 2 are connected by screw threads, the flow supply pipe 3 is connected with the flow supply pipe 3, and the plurality of flow supply pipes 3 pass through the inner holes of the plurality of sieve pore drilling rods 2 to supply slag discharge airflow or water flow to the sieve pore drilling bit 1; the central hole of the flow supply pipe 3 is a flow supply channel 4, and the annular gap between the outer surface of the flow supply pipe 3 and the inner wall of the sieve pore drill rod 2 is an inner slag discharge channel 5. No connecting device is arranged between the in-hole flow supply pipe 3 and the in-hole sieve mesh drill rod 2, torque can be applied to the flow supply pipe 3 to enable the flow supply pipe 3 and the sieve mesh drill rod 2 to rotate relatively, and the spiral groove 33 or the spiral convex rib on the outer surface of the flow supply pipe 3 is utilized to dredge the inner slag discharge passage 5 under the condition that the inner slag discharge passage 5 is accidentally blocked. In order to facilitate the loading and unloading of the flow supply pipe 3, the tail part of the flow supply pipe 3 can be exposed out of the tail part of the sieve mesh drill rod 2 for a certain distance after the sieve mesh drill rod 2 is connected.
In order to prevent the gas flow, water flow or dust from leaking out of the exposed sieve pores of the sieve pore drill rod outside the hole to cause the coal cinder to lose the slag discharge power, when the drilling tool in the outburst coal seam shield pressure relief hole is used, an outer hole sealing system is required to be matched, and the outer hole sealing system comprises a hole sealing dustproof assembly 6 arranged at the opening of the drill hole and a sliding inner sealing pipe 7 inserted in the inner hole of the sieve pore drill rod outside the drill hole.
Fig. 5 is a schematic structural diagram of the hole opening sealing dustproof assembly of the drilling tool, the hole sealing dustproof assembly 6 comprises a hole sealing device and a dustproof portion, the hole sealing device comprises a hole sealing pipe arranged at a drilling opening, the outer wall of the hole sealing pipe is wrapped by a single bag 61 and is inserted into the drilling opening, the dustproof portion comprises an installation barrel and a dustproof brush 62 arranged on the inner wall of the installation barrel, the hole sealing pipe and the installation barrel are connected into a whole, the installation barrel is positioned outside the drilling opening, the sieve pore drilling rod 2 respectively penetrates through a center hole of the hole sealing pipe and a center hole of the installation barrel, and the dustproof brush 62 is in contact fit with the sieve pore drilling rod 2. And after hole drilling and reaming at the hole opening, plugging the hole opening by using the hole sealing dustproof assembly 6.
Fig. 6 is a schematic view of a sliding inner closed pipe structure used for the drilling tool of the present invention at a hole opening, wherein the sliding inner closed pipe 7 is composed of an outer pipe 71, an inner pipe 72 and a support 73, the support 73 keeps the outer pipe 71 and the inner pipe 72 coaxially fixed, and the number, the length and the shape of the support 73 are not limited by the embodiment; the outer pipe 71 has an outer diameter equal to or smaller than the inner diameter of the mesh drill rod 2, and the inner pipe 72 has an inner diameter equal to or larger than the outer diameter of the feed pipe 3. The length of the sliding type inner closed pipe 7 is equal to or more than the sum of the length of a drill guide rail and the distance between a front holder of the drill and the wall of the roadway.
The sliding inner closed pipe 7 is inserted into an inner hole of the sieve pore drill rod 2, and an outer pipe 71 of the sliding inner closed pipe 7 is used for closing a slag discharging sieve pore of the sieve pore drill rod 2 outside a drilled hole; the flow supply pipe 3 is inserted into the inner pipe 72 of the sliding inner closing pipe 7, and the flow supply pipe 3 is positioned at the coaxial center position of the sieve mesh drill rod 2. The inner closed pipe 7 can slide in the inner hole of the sieve pore drill rod 2, and along with the drilling, after the drill rod is additionally connected every time, the inner closed pipe slides to the inner hole of the sieve pore drill rod at the tail end; the sliding inner closed pipe 7 has the functions of exposing sieve pores of the closed-pore outer sieve pore drill rod 2 and righting the flow supply pipe 3, and the flow supply pipe 3 is coaxial with the sieve pore drill rod 2 and is convenient to be additionally connected with the flow supply pipe 3.
FIG. 7 is a schematic view of the overall construction of the drilling tool and the downhole closure system of the present invention. The sieve mesh drill bit 1 is in threaded connection with a first sieve mesh drill rod 2, adjacent sieve mesh drill rods 2 are in threaded connection, a plurality of flow supply pipes 3 are connected and penetrate through inner holes of the sieve mesh drill rods 2 to form a flow supply channel 4 for supplying slag discharge airflow or water flow to the sieve mesh drill bit 1, and an annular space between the outer surface of each flow supply pipe 3 and the inner wall of each sieve mesh drill rod 2 is an inner slag discharge channel 5; the first flow supply pipe 3 is connected to a rotary flow supply short joint 13 of the sieve pore drill bit 1, the rear end flow supply pipe 3 is inserted into the sliding inner closed pipe 7, and the sliding inner closed pipe 7 is inserted into an inner hole of the sieve pore drill rod 2 outside a drilling hole.
Because no connecting device is arranged between the flow supply pipe 3 and the sieve mesh drill rod 2 in the drill hole, the flow supply pipe 3 and the sieve mesh drill rod 2 can synchronously rotate or not synchronously rotate in the drilling construction process. Under the condition that the slag discharging channel 5 in the drill rod is accidentally blocked, torque can be applied to the flow supply pipe 3 to enable the flow supply pipe 3 and the sieve mesh drill rod 2 to rotate relatively, and the spiral groove 33 or the spiral convex rib on the outer surface of the flow supply pipe 3 is utilized to dredge the slag discharging channel 5 in the drill rod.
The flow supply pipe 3 can float in the center of the drill rod, so that bridging and blockage of coal cinder in the cinder discharging and slag discharging 5 in the drill rod can be avoided, the diameter of the cinder discharging sieve pore 22 can be larger, and the cinder discharging effect of the sieve pore is better; the floating type flow supply pipe 3 has disturbance crushing effect on large-diameter coal slag particles in the slag discharge channel 5 in the drill rod, and the slag discharge of fluid is more smooth.
The tail ends of the sieve pore drill rod 2 and the flow supply pipe 3 outside the drilled hole are respectively connected with a drill rod joint and a flow supply joint of the flow supply device.
The annular space between the inner surface of the sieve pore drill rod 2 and the outer surface of the flow supply pipe 3 is an inner slag discharge channel 5 for discharging slag, coal slag particles are conveyed in the inner slag discharge channel 5 at a high speed, and the flow supply pipe 3 floats and rubs in an inner hole of the sieve pore drill rod 2, so that the drilling tool can meet the requirements of flame retardance, static resistance, spark prevention and the like of the underground coal mine, the drilling tool needs to be processed by selecting materials meeting the underground use requirements of the coal mine, for example, the flow supply pipe 3 is processed by engineering plastics such as a copper pipe or an antistatic nylon pipe and the like, or special materials are sprayed on the friction surface of the drilling tool or thin-wall pipes are inlaid to improve the use performance of the drilling tool, and the special processing technological changes of the drilling tool are also in the protection range of the patent.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A drilling tool in a shield pressure relief hole of an outburst coal seam is characterized by comprising sieve pore drill bits, a plurality of sieve pore drill rods and a plurality of flow supply pipes, wherein a plurality of slag relief sieve pores penetrating through the wall thickness of a rod body are arranged on the outer walls of the sieve pore drill rods; the first flow supply pipe is connected to the sieve hole drill, the flow supply pipe at the rear end is inserted into the sliding inner closed pipe, and the sliding inner closed pipe is inserted into an inner hole of a sieve hole drill rod outside a drill hole.
2. The drilling tool for drilling in the pressure relief hole of the shield protection of the protruded coal seam according to claim 1, wherein the sieve pore drill bit comprises a bit shell, one end of the bit shell is provided with a screw thread connected with a sieve pore drill rod, the other end of the bit shell is provided with a flow outlet hole, a rotary flow supply nipple is rotatably arranged in the bit shell along the axial direction of the sieve pore drill rod, one end of the rotary flow supply nipple is communicated with the flow outlet hole, and the other end of the rotary flow supply nipple is connected with a flow supply pipe; the drill bit shell is provided with a spiral groove and a sieve pore; and a support frame is arranged between the rotary flow supply short joint and the drill bit shell.
3. The drilling tool for the pressure relief hole in the shield of the protruded coal seam as claimed in claim 2, wherein the two ends of the sieve pore drilling rod are provided with a male buckle and a female buckle, the outer surface of the sieve pore drilling rod is provided with a spiral groove or a spiral rib or an axial plane, and the slag relief sieve pore is arranged along the spiral groove or the spiral rib or the axial plane.
4. The drilling tool in the shield pressure relief hole of the protruded coal seam as claimed in claim 1, wherein the two ends of the flow supply pipe are provided with a male buckle and a female buckle, and the outer surface of the flow supply pipe is provided with a spiral groove or a spiral convex rib.
5. An extra-well sealing system for use with a drilling tool for drilling into a shield pressure relief hole in a protruding coal seam according to any of claims 1 to 4, comprising a hole sealing dust-proof assembly mounted at the opening of the drilled hole and a sliding inner sealing tube inserted into the inner hole of a drill rod of a sieve hole outside the drilled hole.
6. The system of claim 5, wherein the hole sealing and dust preventing assembly comprises a hole sealer and a dust preventing part, the hole sealer comprises a hole sealing tube installed at the opening of the drilled hole, the outer wall of the hole sealing tube is wrapped with a single bag and inserted into the drilled hole, the dust preventing part comprises a mounting tube and a dust preventing brush installed on the inner wall of the mounting tube,
the hole sealing pipe is connected with the mounting cylinder into a whole, the mounting cylinder is positioned outside the drilling opening, the sieve mesh drill rod penetrates through a center hole of the hole sealing pipe and a center hole of the mounting cylinder respectively, and the dustproof hairbrush is in contact fit with the sieve mesh drill rod.
7. The system of claim 5, wherein the sliding inner closing tube comprises an outer tube, an inner tube and a support, the support keeps the outer tube and the inner tube coaxial, the outer diameter of the outer tube is equal to or less than the inner diameter of the mesh drill rod, and the inner diameter of the inner tube is equal to or greater than the outer diameter of the flow supply tube.
8. The system of claim 7, wherein the sliding inner closing tube is inserted into the inner bore of the sieve pore drill rod, and the outer tube of the sliding inner closing tube closes the slag discharge sieve pore exposed out of the sieve pore drill rod; the flow supply pipe is inserted into the inner pipe of the sliding inner closed pipe, and the flow supply pipe and the sieve mesh drill rod are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111345667.1A CN114033315B (en) | 2021-11-15 | 2021-11-15 | Protruding coal seam shield pressure relief hole inner drilling tool and hole outer sealing system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111345667.1A CN114033315B (en) | 2021-11-15 | 2021-11-15 | Protruding coal seam shield pressure relief hole inner drilling tool and hole outer sealing system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114033315A true CN114033315A (en) | 2022-02-11 |
| CN114033315B CN114033315B (en) | 2023-09-15 |
Family
ID=80144283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111345667.1A Active CN114033315B (en) | 2021-11-15 | 2021-11-15 | Protruding coal seam shield pressure relief hole inner drilling tool and hole outer sealing system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114033315B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045640A (en) * | 2022-06-27 | 2022-09-13 | 中煤科工集团西安研究院有限公司 | Device and method for pulling screen pipe in opposite directions through penetrating drilled holes |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013151477A1 (en) * | 2012-04-04 | 2013-10-10 | Lkab Wassara Ab | Apparatus for drilling and lining a borehole |
| CN103382817A (en) * | 2013-07-26 | 2013-11-06 | 中国矿业大学 | Anchoring anti-blocking drill pipe for coal mine base plate |
| CN103556940A (en) * | 2013-11-15 | 2014-02-05 | 河南理工大学 | Dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and construction method of drilling tool |
| CN205422527U (en) * | 2016-03-14 | 2016-08-03 | 中国矿业大学(北京) | A many power supplies combination drilling tool for soft coal creeps into on layer |
| CN106837179A (en) * | 2017-03-30 | 2017-06-13 | 河南理工大学 | Soft and broken seam bore expanded hole device |
| CN108505955A (en) * | 2018-05-21 | 2018-09-07 | 河南理工大学 | Deslagging drilling rod in a kind of guard aperture release |
| CN108798540A (en) * | 2018-05-21 | 2018-11-13 | 河南理工大学 | Spiral convex rib cuts deslagging drilling rod in the release of hole |
| CN213330951U (en) * | 2020-07-31 | 2021-06-01 | 中国矿业大学 | Water circulation internal slag discharging drill rod |
| CN113153147A (en) * | 2021-04-07 | 2021-07-23 | 河南理工大学 | Drilling tool in pressure relief hole of outburst coal seam hole protection and special hole external closed slag discharge system thereof |
-
2021
- 2021-11-15 CN CN202111345667.1A patent/CN114033315B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013151477A1 (en) * | 2012-04-04 | 2013-10-10 | Lkab Wassara Ab | Apparatus for drilling and lining a borehole |
| CN103382817A (en) * | 2013-07-26 | 2013-11-06 | 中国矿业大学 | Anchoring anti-blocking drill pipe for coal mine base plate |
| CN103556940A (en) * | 2013-11-15 | 2014-02-05 | 河南理工大学 | Dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and construction method of drilling tool |
| CN205422527U (en) * | 2016-03-14 | 2016-08-03 | 中国矿业大学(北京) | A many power supplies combination drilling tool for soft coal creeps into on layer |
| CN106837179A (en) * | 2017-03-30 | 2017-06-13 | 河南理工大学 | Soft and broken seam bore expanded hole device |
| CN108505955A (en) * | 2018-05-21 | 2018-09-07 | 河南理工大学 | Deslagging drilling rod in a kind of guard aperture release |
| CN108798540A (en) * | 2018-05-21 | 2018-11-13 | 河南理工大学 | Spiral convex rib cuts deslagging drilling rod in the release of hole |
| CN213330951U (en) * | 2020-07-31 | 2021-06-01 | 中国矿业大学 | Water circulation internal slag discharging drill rod |
| CN113153147A (en) * | 2021-04-07 | 2021-07-23 | 河南理工大学 | Drilling tool in pressure relief hole of outburst coal seam hole protection and special hole external closed slag discharge system thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045640A (en) * | 2022-06-27 | 2022-09-13 | 中煤科工集团西安研究院有限公司 | Device and method for pulling screen pipe in opposite directions through penetrating drilled holes |
| CN115045640B (en) * | 2022-06-27 | 2024-03-22 | 中煤科工集团西安研究院有限公司 | Device and method for penetrating through borehole and opposite-pulling lower screen pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114033315B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103556944A (en) | Double-layer internal deslagging and anti-blocking drilling tool for soft and outburst coal seam drilling, and use method of drilling tool | |
| CN109025825B (en) | Underground self-suction particle jet drilling device based on Venturi effect | |
| CN108505955B (en) | Hole-protecting pressure-releasing internal-deslagging drill rod | |
| CN113153147B (en) | Hole inner drilling tool for protecting hole of protruding coal seam and special hole outer closed slag discharging system thereof | |
| CN110469297B (en) | Device and method for completing long-distance sieve tube in coal mine underground gas extraction directional drilling | |
| CN114033315A (en) | Drilling tool in outburst coal seam shield pressure relief hole and hole outer sealing system thereof | |
| CN201391331Y (en) | Integral in-hole drilling tool for drilling slotting punched hole of coal seam | |
| US3414070A (en) | Jet drilling bit | |
| CN111894610B (en) | Double-mode heading machine and shield body sealing structure thereof | |
| CN213330951U (en) | Water circulation internal slag discharging drill rod | |
| CN112112575B (en) | Garrulous soft coal seam airtight coring bit suitable for ground drilling | |
| CN110094167B (en) | Novel mechanical rotary reaming device | |
| CN208280915U (en) | A kind of benefit slurry short circuit for no-dig technique Directional Drilling | |
| CN113153148A (en) | A prevent spouting hole drilling and cutting drill jig for outburst coal seam crossing drilling | |
| CN109209283A (en) | It is lower to drilling with boring plugging type slag-draining device and method | |
| CN210134806U (en) | Coal seam gas extraction drilling hole repairing equipment | |
| CN210714466U (en) | Coal seam drilling is protected directly and is prevented oblique device | |
| CN203441365U (en) | Water jet cutter | |
| CN207453871U (en) | The three axis slotting of coal rock tunnel is punchinged broken rock device | |
| CN113374428B (en) | Protruding coal seam circumference supplies to flow protection hole release sieve mesh drilling rod | |
| CN213597900U (en) | Underground centralizer capable of combining reaming and shunting leakage stoppage functions | |
| CN110630180B (en) | Coal seam drilling straight-keeping and inclined-preventing device | |
| CN204082104U (en) | The self-cleaning cutting seam sieve tube of sand control | |
| CN210798887U (en) | Tunnel drilling rig device capable of limiting fire and explosion based on forced water spraying | |
| CN213928434U (en) | This coal seam area hydraulic cut's large aperture gas drainage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |