CN108278079A - Strengthen cherry coal rock intensity layered cutting drilling method and drilling tool - Google Patents

Strengthen cherry coal rock intensity layered cutting drilling method and drilling tool Download PDF

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Publication number
CN108278079A
CN108278079A CN201810021040.2A CN201810021040A CN108278079A CN 108278079 A CN108278079 A CN 108278079A CN 201810021040 A CN201810021040 A CN 201810021040A CN 108278079 A CN108278079 A CN 108278079A
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China
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coal
drilling
rock
cutting
coal petrography
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CN108278079B (en
Inventor
王永龙
马耕
周福宝
孙玉宁
王振锋
宋维宾
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Shandong Banghong Zhongchuang Intelligent Equipment Co ltd
Henan University of Technology
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Henan University of Technology
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43Rotary 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02Couplings; joints
    • E21B17/04Couplings; joints between rod or the like and bit or between rod and rod or the like
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02Couplings; joints
    • E21B17/04Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/05Swivel joints
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22Rods or pipes with helical structure

Abstract

The invention discloses a kind of reinforcing cherry coal rock intensity layered cutting drilling method and drilling tools, are based on coal petrography solid coefficientfDetermine that ratio is strengthened in drillingd q, it is based on coal petrography solid coefficientf、Gas pressurepDetermine that Coal-Rock Bits cutting number of plies N, cutting thickness H, cutting axis determine the structure design form for strengthening cherry coal rock intensity layered cutting drilling tool away from L.Strengthen cherry coal rock intensity layered cutting drilling tool, including coal petrography strengthens drill bit, rotation seal joint, Coal-Rock Bits, bit adapter, drilling rod.The present invention is directed to cherry coal rock drilling technology problem, consider coal seam geological condition, reinforcing cherry coal rock intensity layered cutting drilling method and drilling tool are invented, using reinforcing cherry coal rock intensity layered cutting drilling tool construction drill, realize the collaboration drilling process scheme that cherry coal rock leading portion is strengthened, back segment cutting is crept into, the drilling powers such as collapse hole, spray orifice phenomenon can be effectively reduced to the influence to drilling construction, be conducive to the drilling effect for improving weak coal bearing seams.

Description

Strengthen cherry coal rock intensity layered cutting drilling method and drilling tool
Technical field
The invention belongs to weak coal rock layer drilling project technical fields, and in particular to a kind of layering of reinforcing cherry coal rock intensity is cut Cut drilling method and drilling tool.
Background technology
Currently, weak coal rock layer drilling construction is one great difficult problem of drilling project technical field.Weak coal rock layer drilling In the process, it since drilling deflection is big and easy unstable failure, causes that drilling resistance is big, deslagging is difficult, causes that drilling depth is shallow, bores It is low into efficiency, while the boring accidents such as bit freezing, breaking of rod take place frequently in drilling process.Especially underground coal mine soft seam containing gas drills Construction is acted on by factors such as crustal stress, gas pressure, tectonic stresses, and the deformation that drills, destruction are extremely serious, and drilling resistance is big, arranges Slag space easily blocks, and the drillings accidents such as the breaking of rod, drilling gas burning easily occur in drilling process.Problem is crept into for cherry coal rock, Scientific research and engineering staff have carried out a large amount of research, have developed serial drilling method and new drilling tool, for example, patent name is " creeping into closed spiral guard aperture drilling tool and its application method for weak seam "(ZL201410567089.X), " be used for cherry coal Rock creeps into the porous turbulent release drilling tool of binary channels and its construction method "(ZL201310568692.5), " be used for soft prominent coal The anti-blocking drilling tool of deslagging and its application method in layer drilling bilayer "(ZL201310566830.6), " outburst coal seam hole cooling bore Tool and its drilling method "(ZL200610111830.7), " for mash gas pumping drilling construction low helical abrasion-proof drill rod and its add Work technique "(ZL200810049974.3), " Asymmetric special-section drill rod "(ZL200910064223.3), " special-shaped more ribs are carved Traverse drill bar "(ZL200910064973.0)Preferable drilling effect has all been got, China's cherry coal rock has been advanced to a certain extent and bores Visit the raising of engineering technology level.For the drilling construction of weak coal and rock, if it is possible to the intensity for improving weak coal and rock, In drilling process, collapse hole phenomenon is advantageously reduced or avoided, reduces drilling resistance indirectly, is conducive to promote drilling results.Mesh Before, domestic and international scientific research personnel has also carried out a large amount of research, and proposes certain methods, for example, proposing using pressurize drilling, admittedly The breast wall technologies such as wall liquid carry out Reinforcing hole wall, reduce influence of the borehole collapse to drilling, but these technologies are applied to nearly horizontal gas Extraction borehole, enforcement difficulty is big, and retaining wall effect is poor.Therefore, the present invention proposes to strengthen cherry coal rock intensity layered cutting drilling method And drilling tool.According to job location coal rock layer geological conditions, based on reinforcing cherry coal rock intensity layered cutting drilling method and determine strong The structure design form for changing cherry coal rock intensity layered cutting drilling tool strengthens drill bit using coal petrography, multiple Coal-Rock Bits are combined and to be formed New drilling tool construction drill, drill bit is strengthened by the coal petrography mounted on front end and squeezes weak coal and rock, improves borehole circumference The intensity of weak coal and rock improves the stability of borehole wall, is conducive to prevent drilling collapse hole;Pass through the coal petrography of different-diameter Drill bit layered cutting removes the coal and rock being reinforced, and advantageously reduces borehole wall caused by due to bit cutting amount is excessive and loses It is steady to destroy.Using the drilling construction for strengthening the weak coal and rock of cherry coal rock intensity layered cutting drilling tool progress, cherry coal rock " leading portion is realized The synchronization drilling process system of reinforcing, back segment layered cutting " is conducive to improve cherry coal rock drilling depth and drilling efficiency.
Invention content
The object of the present invention is to provide a kind of reinforcing cherry coal rock intensity layered cutting drilling method and drilling tools, solve cherry coal rock The difficult technical problem of the easy collapse hole of drilling construction, drilling.
In order to solve the above technical problems, the present invention adopts the following technical scheme that:Strengthen cherry coal rock intensity layered cutting drilling Method includes the following steps:
1. takes coal sample or rock sample in place to be onstructed, coal petrography solid coefficient is determined by laboratory testf;Measure construction ground Point coal-bed gas pressurep
2. is according to job location coal petrography solid coefficientfDetermine that ratio is strengthened in drillingd q;Ratio is strengthened in drillingd qTo be mounted on coal petrography The coal petrography of chisel edge strengthens drill bit maximum rotating diameterd 1With the Coal-Rock Bits maximum rotating diameter mounted on drilling rod front endd 2's Ratio;As 0 < of coal petrography solid coefficientfWhen≤0.3, ratio is strengthened in drillingd qIt is designed as 0.5~1;When coal petrography solid coefficient 0.3 <fWhen≤0.5, ratio is strengthened in drillingd qIt is designed as 0.3~0.8;As 0.5 < of coal petrography solid coefficientfWhen≤0.8, drilling is strengthened Thand qIt is designed as 0~0.5;As 0.8 < of coal petrography solid coefficientfWhen≤1.2, ratio is strengthened in drillingd qIt is designed as 0~0.3;
3. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting number of plies N;Cut number of plies N For the number of completion is cut after coal and rock coldworking strengthened at porose area Coal-Rock Bits thickness h to be cut;When coal petrography solid coefficient 0 <f≤ 0.3, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 4~15;When coal petrography solid coefficient 0 <f≤ 0.3, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~12;When coal petrography solid coefficient 0.3 <f≤ 0.5, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~12;When coal petrography robustness system Several 0.3 <f≤ 0.5, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~10;When coal petrography robustness 0.5 < of coefficientf≤ 0.8, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~10;When coal petrography is firm 0.5 < of property coefficientf≤ 0.8, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~8;When coal petrography is firm 0.8 < of property coefficientf≤ 1.2, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~8;When coal petrography heavily fortified point 0.8 < of solidity coefficientf≤ 1.2, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~6;
4. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting thickness H;Cut thickness H For the thickness of each layer of cutting of drill bit;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressurepWhen >=0.74 MPa, thickness H It is designed as the mm of 2 mm~15;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressurep<When 0.74 MPa, thickness H is designed as 3 The mm of mm~15;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurepWhen >=0.74 MPa, thickness H be designed as 3 mm~ 15 mm;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurep<When 0.74 MPa, thickness H is designed as 4 mm~15 mm;As 0.5 < of coal petrography solid coefficientf≤ 0.8, gas pressurepWhen >=0.74 MPa, thickness H is designed as the mm of 4 mm~15; As 0.5 < of coal petrography solid coefficientf≤ 0.8, gas pressurep<When 0.74 MPa, thickness H is designed as the mm of 5 mm~15;Work as coal 0.8 < of rock solid coefficientf≤ 1.2, gas pressurepWhen >=0.74 MPa, thickness H is designed as the mm of 5 mm~15;When coal petrography heavily fortified point 0.8 < of solidity coefficientf≤ 1.2, gas pressurep<When 0.74 MPa, thickness H is designed as the mm of 5 mm~20;
5. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting axis away from L;Cutting axis is away from L For the axial distance between the layered cutting starting position twice in succession that drills;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressure PowerpWhen >=0.74 MPa, cutting axis is designed as the mm of 150 mm~800 away from L;As 0 < of coal petrography solid coefficientf≤ 0.3, gas Pressurep<When 0.74 MPa, cutting axis is designed as the mm of 120 mm~700 away from L;As 0.3 < of coal petrography solid coefficientf≤ 0.5, watt This pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 130 mm~750 away from L;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 100 mm~650 away from L;As 0.5 < of coal petrography solid coefficientf ≤ 0.8, gas pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 110 mm~700 away from L;When coal petrography solid coefficient 0.5 <f≤ 0.8, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 80 mm~600 away from L;When coal petrography solid coefficient 0.8 <f≤ 1.2, gas pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 90 mm~650 away from L;When coal petrography robustness system Several 0.8 <f≤ 1.2, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 50 mm~550 away from L;
6. drilling rod is mounted on drilling machine by, cherry coal rock intensity layered cutting drilling tool is strengthened in installation, adjusts construction angle, starts Drilling machine increases drilling machine and is fed power, and coal petrography, which is strengthened drill bit, is pressed into coal and rock, when Coal-Rock Bits touch coal petrography wall, starts and bores Machine rotation starts brokenly coal petrography and creeps into, and in drilling process, coal petrography reinforcing drill bit does not rotate or rotary speed νq≤5 r/min;
7. according to job location coal rock layer geological conditions, determines spacing between drilling construction diameter, drilling, hole spacing top bottom Plate distance, dip angle of hole, azimuth, and according to step 1.~6., assess job location coal petrography solid coefficientf, it is based on coal petrography Solid coefficientfDetermine that ratio is strengthened in drillingd q, it is based on coal petrography solid coefficientf、Gas pressurepDetermine that Coal-Rock Bits cut the number of plies N, cutting thickness H, cutting axis are away from L, and determine the structure design form for strengthening cherry coal rock intensity layered cutting drilling tool.
Strengthen cherry coal rock intensity layered cutting drilling tool, structure is carried out using cherry coal rock intensity layered cutting drilling method is strengthened Design, including coal petrography strengthen drill bit, rotation seal joint, Coal-Rock Bits, bit adapter, drilling rod, it is characterised in that:The coal petrography It is coaxial to strengthen drill bit, rotation seal joint, Coal-Rock Bits, bit adapter, drilling rod, coal petrography reinforcing drill bit is connected to rotatory sealing and connects One end of head, Coal-Rock Bits are connected to the other end of rotation seal joint, and drilling rod is connect with Coal-Rock Bits;Bit adapter is for connecting Connect two Coal-Rock Bits.
Strengthen cherry coal rock intensity layered cutting drilling tool, the coal petrography strengthens drill bit by crown, reinforcing body, reinforcing joint group At crown, reinforcing body surface face are set as smooth and/or groove and/or protrusion, and reinforcing joint is used for and rotation seal joint connects It connects.
Strengthen cherry coal rock intensity layered cutting drilling tool, the rotation seal joint is by front connector, rotary body and rear joint Composition, the reinforcing joint that drill bit is strengthened in front connector with coal petrography step by step are connect, and rear joint is connect with Coal-Rock Bits.
Strengthen cherry coal rock intensity layered cutting drilling tool, the rotary body is made of outer ring, rolling element, inner ring;Coal petrography is strong Change drill bit to connect with rotary body inner ring by front connector, Coal-Rock Bits are connect with rotary body outer ring;Coal petrography strengthens drill bit, coal petrography bores Head any one end is fixed, and the other end, which applies power, to be rotated.
As the above scheme is adopted, the present invention has the following effects that:
The present invention proposes the drilling method of weak coal and rock " leading portion strengthen, back segment layered cutting ", by the innovation of drill bit structure, It forms coal petrography and strengthens the novel reinforced cherry coal rock intensity drilling tool that drill bit, rotation seal joint, Coal-Rock Bits, bit adapter combine. In drilling process, the coal petrography for being mounted on front end strengthens the weak coal and rock of drill bit extruding, improves borehole circumference weakness coal and rock Intensity improves the stability of borehole wall, is conducive to prevent drilling collapse hole;Coal petrography strengthens the coal and rock that drill bit was strengthened, and leads to The Coal-Rock Bits layered cutting for crossing different-diameter removes the coal and rock being reinforced, and advantageously reduces due to bit cutting amount is excessive Caused by borehole wall unstable failure.It is applied using the drilling for strengthening the weak coal and rock of cherry coal rock intensity layered cutting drilling tool progress Work can effectively reduce the drilling powers such as collapse hole, spray orifice phenomenon to the influence to drilling construction, be conducive to improve weak coal bearing seams Drilling effect.
Description of the drawings
Fig. 1 is the structural schematic diagram that the embodiment of the present invention one strengthens cherry coal rock intensity layered cutting drilling tool;
Fig. 2 is the sectional view that one coal petrography of the embodiment of the present invention strengthens drill bit, rotation seal joint, Coal-Rock Bits connection structure;
Fig. 3 is the 3-D view of Fig. 2;
Fig. 4 is that cherry coal rock intensity layered cutting schematic diagram is strengthened in drilling;
Fig. 5 is to strengthen cherry coal rock intensity layered cutting drilling tool construction drill schematic diagram;
Fig. 6 is the front view that the embodiment of the present invention two strengthens cherry coal rock intensity layered cutting drilling tool;
Fig. 7 is the front view that the embodiment of the present invention three strengthens cherry coal rock intensity layered cutting drilling tool.
Specific implementation mode
Embodiment one:
As shown in FIG. 1 to 3, the object of the present invention is to provide a kind of reinforcing cherry coal rock intensity layered cutting drilling method and brills Tool solves the difficult technical problem of the easy collapse hole of cherry coal rock drilling construction, drilling.In order to solve the above technical problems, the present invention is using such as Lower technical solution:Strengthen cherry coal rock intensity layered cutting drilling method, includes the following steps:
1. takes coal sample or rock sample in place to be onstructed, coal petrography solid coefficient is determined by laboratory testf;Measure construction ground Point coal-bed gas pressurep
2. is according to job location coal petrography solid coefficientfDetermine that ratio is strengthened in drillingd q;Ratio is strengthened in drillingd qTo be mounted on coal petrography The coal petrography of chisel edge strengthens drill bit maximum rotating diameterd 1With the Coal-Rock Bits maximum rotating diameter mounted on drilling rod front endd 2's Ratio;As 0 < of coal petrography solid coefficientfWhen≤0.3, ratio is strengthened in drillingd qIt is designed as 0.5~1;When coal petrography solid coefficient 0.3 <fWhen≤0.5, ratio is strengthened in drillingd qIt is designed as 0.3~0.8;As 0.5 < of coal petrography solid coefficientfWhen≤0.8, drilling is strengthened Thand qIt is designed as 0~0.5;As 0.8 < of coal petrography solid coefficientfWhen≤1.2, ratio is strengthened in drillingd qIt is designed as 0~0.3;
3. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting number of plies N;Cut number of plies N For the number of completion is cut after coal and rock coldworking strengthened at porose area Coal-Rock Bits thickness h to be cut;When coal petrography solid coefficient 0 <f≤ 0.3, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 4~15;When coal petrography solid coefficient 0 <f≤ 0.3, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~12;When coal petrography solid coefficient 0.3 <f≤ 0.5, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~12;When coal petrography robustness system Several 0.3 <f≤ 0.5, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~10;When coal petrography robustness 0.5 < of coefficientf≤ 0.8, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~10;When coal petrography is firm 0.5 < of property coefficientf≤ 0.8, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~8;When coal petrography is firm 0.8 < of property coefficientf≤ 1.2, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~8;When coal petrography heavily fortified point 0.8 < of solidity coefficientf≤ 1.2, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~6;
4. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting thickness H;Cut thickness H For the thickness of each layer of cutting of drill bit;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressurepWhen >=0.74 MPa, thickness H It is designed as the mm of 2 mm~15;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressurep<When 0.74 MPa, thickness H is designed as 3 The mm of mm~15;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurepWhen >=0.74 MPa, thickness H be designed as 3 mm~ 15 mm;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurep<When 0.74 MPa, thickness H is designed as 4 mm~15 mm;As 0.5 < of coal petrography solid coefficientf≤ 0.8, gas pressurepWhen >=0.74 MPa, thickness H is designed as the mm of 4 mm~15; As 0.5 < of coal petrography solid coefficientf≤ 0.8, gas pressurep<When 0.74 MPa, thickness H is designed as the mm of 5 mm~15;Work as coal 0.8 < of rock solid coefficientf≤ 1.2, gas pressurepWhen >=0.74 MPa, thickness H is designed as the mm of 5 mm~15;When coal petrography heavily fortified point 0.8 < of solidity coefficientf≤ 1.2, gas pressurep<When 0.74 MPa, thickness H is designed as the mm of 5 mm~20;
5. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting axis away from L;Cutting axis is away from L For the axial distance between the layered cutting starting position twice in succession that drills;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressure PowerpWhen >=0.74 MPa, cutting axis is designed as the mm of 150 mm~800 away from L;As 0 < of coal petrography solid coefficientf≤ 0.3, gas Pressurep<When 0.74 MPa, cutting axis is designed as the mm of 120 mm~700 away from L;As 0.3 < of coal petrography solid coefficientf≤ 0.5, watt This pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 130 mm~750 away from L;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 100 mm~650 away from L;As 0.5 < of coal petrography solid coefficientf ≤ 0.8, gas pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 110 mm~700 away from L;When coal petrography solid coefficient 0.5 <f≤ 0.8, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 80 mm~600 away from L;When coal petrography solid coefficient 0.8 <f≤ 1.2, gas pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 90 mm~650 away from L;When coal petrography robustness system Several 0.8 <f≤ 1.2, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 50 mm~550 away from L;
6. drilling rod is mounted on drilling machine by, cherry coal rock intensity layered cutting drilling tool is strengthened in installation, adjusts construction angle, starts Drilling machine increases drilling machine and is fed power, and coal petrography, which is strengthened drill bit, is pressed into coal and rock, when Coal-Rock Bits touch coal petrography wall, starts and bores Machine rotation starts brokenly coal petrography and creeps into, and in drilling process, coal petrography reinforcing drill bit does not rotate or rotary speed νq≤5 r/min;
7. according to job location coal rock layer geological conditions, determines spacing between drilling construction diameter, drilling, hole spacing top bottom Plate distance, dip angle of hole, azimuth, and according to step 1.~6., assess job location coal petrography solid coefficientf, it is based on coal petrography Solid coefficientfDetermine that ratio is strengthened in drillingd q, it is based on coal petrography solid coefficientf、Gas pressurepDetermine that Coal-Rock Bits cut the number of plies N, cutting thickness H, cutting axis are away from L, and determine the structure design form for strengthening cherry coal rock intensity layered cutting drilling tool.
Strengthen cherry coal rock intensity layered cutting drilling tool, structure is carried out using cherry coal rock intensity layered cutting drilling method is strengthened Design, including coal petrography reinforcing drill bit 1, rotation seal joint 2, Coal-Rock Bits 3, bit adapter 4, drilling rod 5, coal petrography reinforcing drill bit 1, Rotation seal joint 2, Coal-Rock Bits 3, bit adapter 4, drilling rod 5 are coaxial, and coal petrography strengthens drill bit 1 and is connected to rotation seal joint 2 One end, Coal-Rock Bits 3 are connected to the other end of rotation seal joint 2, and drilling rod 5 is connect with Coal-Rock Bits 3;Bit adapter 4 is used In two Coal-Rock Bits 3 of connection.Coal petrography is strengthened drill bit 1 and is made of crown 11, reinforcing body 12, reinforcing joint 13, and crown 11 is strengthened 12 surface of body is set as smooth and/or groove and/or protrusion, and reinforcing joint 13 with rotation seal joint 2 for connecting.It rotates close Sealing joint 2 is made of front connector 21, rotary body 22 and rear joint 23, and the reinforcing joint 13 of drill bit 1 is strengthened in front connector 21 with coal petrography Connection, rear joint 23 are connect with Coal-Rock Bits 3.Rotary body 22 is made of outer ring 221, rolling element 222, inner ring 223;Coal petrography is strengthened Drill bit 1 is connect by front connector 21 with rotary body inner ring 223, and Coal-Rock Bits 3 are connect with 22 outer ring 221 of rotary body;Coal petrography is strengthened Drill bit 1,3 any one end of Coal-Rock Bits are fixed, and the other end, which applies power, to be rotated.
The embodiment of the present invention one is described below and strengthens cherry coal rock intensity layered cutting drilling tool boring principle:
The present invention determines coal petrography solid coefficient according to job location coal rock layer geological conditions, by laboratory testf, it is based on coal Rock solid coefficientfDetermine that ratio is strengthened in drillingd q, it is based on coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting lay Number N, cutting thickness H, cutting axis determine the structure design form for strengthening cherry coal rock intensity layered cutting drilling tool away from L.Such as Fig. 4 Shown, ratio is strengthened in drillingd q=d 1/d 2, it is 2 layers that Coal-Rock Bits, which cut the number of plies, and first layer cutting layer thickness is H1, second layer cutting Layer thickness is H2, cutting axis is away from for L.As shown in figure 5, drilling construction is divided into stiffened region, 1 layer of cutting region, 2 layers of cutting region.By force Change area:In drilling process, coal petrography strengthens drill bit 1 and is pressed into coal and rock by drilling machine propulsive force, since coal petrography strengthens drill bit 1 and coal petrography Frictional force between body ensure that coal petrography is strengthened drill bit 1 and do not rotated or rotary speed ν by rotation seal joint 2q≤5 r/ Min extends forward with drilling, and coal petrography strengthens drill bit 1 and constantly squeezes weak coal and rock, makes the steady of borehole circumference weakness coal and rock It is qualitative to be improved.1 layer of cutting region:As shown in Figure 1, the smaller Coal-Rock Bits 31 of diameter are mounted on after coal petrography strengthens drill bit 1 End, drilling machine holding drill pipe 5 drive 1 layer of cutting region after the reinforcing of 31 rotary cutting of Coal-Rock Bits.2 layers of cutting region:As shown in Figure 1, The Coal-Rock Bits 32 being relatively large in diameter are mounted on the rear end of Coal-Rock Bits 31 by bit adapter 4, and drilling machine holding drill pipe 5 drives coal petrography 2 layers of cutting region after the reinforcing of 32 rotary cutting of drill bit.Drilling after reinforcing is subjected to layered cutting construction, is advantageously reduced because boring Head cutting output it is excessive and caused by borehole wall unstable failure.Weak coal is carried out using cherry coal rock intensity layered cutting drilling tool is strengthened The drilling construction of rock mass can effectively reduce the drilling powers such as collapse hole, spray orifice phenomenon to the influence to drilling construction, be conducive to improve The drilling effect of weak coal bearing seams.
Embodiment two:As shown in fig. 6, different from embodiment one is, strengthens cherry coal rock intensity layered cutting drilling tool and set The Coal-Rock Bits 3 of 3 different-diameters are counted, it is 3 layers that Coal-Rock Bits, which cut the number of plies,.
Embodiment two:As shown in fig. 7, different from embodiment one is, strengthens cherry coal rock intensity layered cutting drilling tool and set The Coal-Rock Bits 3 of 4 different-diameters are counted, it is 4 layers that Coal-Rock Bits, which cut the number of plies,.

Claims (5)

1. strengthening cherry coal rock intensity layered cutting drilling method, it is characterised in that:Include the following steps:
1. takes coal sample or rock sample in place to be onstructed, coal petrography solid coefficient is determined by laboratory testf;Measure construction ground Point coal-bed gas pressurep
2. is according to job location coal petrography solid coefficientfDetermine that ratio is strengthened in drillingd q;Ratio is strengthened in drillingd qIt is bored to be mounted on coal petrography The coal petrography of head front end strengthens drill bit maximum rotating diameterd 1With the Coal-Rock Bits maximum rotating diameter mounted on drilling rod front endd 2Ratio Value;As 0 < of coal petrography solid coefficientfWhen≤0.3, ratio is strengthened in drillingd qIt is designed as 0.5~1;As 0.3 < of coal petrography solid coefficientfWhen≤0.5, ratio is strengthened in drillingd qIt is designed as 0.3~0.8;As 0.5 < of coal petrography solid coefficientfWhen≤0.8, ratio is strengthened in drillingd q It is designed as 0~0.5;As 0.8 < of coal petrography solid coefficientfWhen≤1.2, ratio is strengthened in drillingd qIt is designed as 0~0.3;
3. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting number of plies N;Cut number of plies N For the number of completion is cut after coal and rock coldworking strengthened at porose area Coal-Rock Bits thickness h to be cut;When coal petrography solid coefficient 0 <f≤ 0.3, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 4~15;When coal petrography solid coefficient 0 <f≤ 0.3, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~12;When coal petrography solid coefficient 0.3 <f≤ 0.5, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~12;When coal petrography robustness system Several 0.3 <f≤ 0.5, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~10;When coal petrography robustness 0.5 < of coefficientf≤ 0.8, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 3~10;When coal petrography is firm 0.5 < of property coefficientf≤ 0.8, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~8;When coal petrography is firm 0.8 < of property coefficientf≤ 1.2, gas pressurepWhen >=0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~8;When coal petrography heavily fortified point 0.8 < of solidity coefficientf≤ 1.2, gas pressurep<When 0.74 MPa, Coal-Rock Bits cutting number of plies N is designed as 2~6;
4. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting thickness H;Cut thickness H For the thickness of each layer of cutting of drill bit;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressurepWhen >=0.74 MPa, thickness H It is designed as the mm of 2 mm~15;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressurep<When 0.74 MPa, thickness H is designed as 3 The mm of mm~15;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurepWhen >=0.74 MPa, thickness H be designed as 3 mm~ 15 mm;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurep<When 0.74 MPa, thickness H is designed as 4 mm~15 mm;As 0.5 < of coal petrography solid coefficientf≤ 0.8, gas pressurepWhen >=0.74 MPa, thickness H is designed as the mm of 4 mm~15; As 0.5 < of coal petrography solid coefficientf≤ 0.8, gas pressurep<When 0.74 MPa, thickness H is designed as the mm of 5 mm~15;Work as coal 0.8 < of rock solid coefficientf≤ 1.2, gas pressurepWhen >=0.74 MPa, thickness H is designed as the mm of 5 mm~15;When coal petrography heavily fortified point 0.8 < of solidity coefficientf≤ 1.2, gas pressurep<When 0.74 MPa, thickness H is designed as the mm of 5 mm~20;
5. is according to job location coal petrography solid coefficientf、Gas pressurepDetermine Coal-Rock Bits cutting axis away from L;Cutting axis is away from L For the axial distance between the layered cutting starting position twice in succession that drills;As 0 < of coal petrography solid coefficientf≤ 0.3, gas pressure PowerpWhen >=0.74 MPa, cutting axis is designed as the mm of 150 mm~800 away from L;As 0 < of coal petrography solid coefficientf≤ 0.3, gas Pressurep<When 0.74 MPa, cutting axis is designed as the mm of 120 mm~700 away from L;As 0.3 < of coal petrography solid coefficientf≤ 0.5, watt This pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 130 mm~750 away from L;As 0.3 < of coal petrography solid coefficientf≤ 0.5, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 100 mm~650 away from L;As 0.5 < of coal petrography solid coefficientf ≤ 0.8, gas pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 110 mm~700 away from L;When coal petrography solid coefficient 0.5 <f≤ 0.8, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 80 mm~600 away from L;When coal petrography solid coefficient 0.8 <f≤ 1.2, gas pressurepWhen >=0.74 MPa, cutting axis is designed as the mm of 90 mm~650 away from L;When coal petrography robustness system Several 0.8 <f≤ 1.2, gas pressurep<When 0.74 MPa, cutting axis is designed as the mm of 50 mm~550 away from L;
6. drilling rod is mounted on drilling machine by, cherry coal rock intensity layered cutting drilling tool is strengthened in installation, adjusts construction angle, starts Drilling machine increases drilling machine and is fed power, and coal petrography, which is strengthened drill bit, is pressed into coal and rock, when Coal-Rock Bits touch coal petrography wall, starts and bores Machine rotation starts brokenly coal petrography and creeps into, and in drilling process, coal petrography reinforcing drill bit does not rotate or rotary speed νq≤5 r/min;
7. according to job location coal rock layer geological conditions, determines spacing between drilling construction diameter, drilling, hole spacing top bottom Plate distance, dip angle of hole, azimuth, and according to step 1.~6., assess job location coal petrography solid coefficientf, it is based on coal petrography Solid coefficientfDetermine that ratio is strengthened in drillingd q, it is based on coal petrography solid coefficientf、Gas pressurepDetermine that Coal-Rock Bits cut the number of plies N, cutting thickness H, cutting axis are away from L, and determine the structure design form for strengthening cherry coal rock intensity layered cutting drilling tool.
2. strengthening cherry coal rock intensity layered cutting drilling tool, strengthen cherry coal rock intensity layered cutting using as described in claim 1 Drilling method carries out structure design, including coal petrography strengthens drill bit, rotation seal joint, Coal-Rock Bits, bit adapter, drilling rod, It is characterized in that:The coal petrography reinforcing drill bit, rotation seal joint, Coal-Rock Bits, bit adapter, drilling rod are coaxial, and coal petrography, which is strengthened, to be bored Head is connected to one end of rotation seal joint, and Coal-Rock Bits are connected to the other end of rotation seal joint, drilling rod and Coal-Rock Bits Connection;Bit adapter is for connecting two Coal-Rock Bits.
3. reinforcing cherry coal rock intensity layered cutting drilling tool according to claim 2, it is characterised in that:The coal petrography is strengthened Drill bit is made of crown, reinforcing body, reinforcing joint, and crown, reinforcing body surface face are set as smooth and/or groove and/or protrusion, by force Change connector for being connect with rotation seal joint.
4. reinforcing cherry coal rock intensity layered cutting drilling tool according to claim 2 or 3, it is characterised in that:The rotation Seal nipple is made of front connector, rotary body and rear joint, and the reinforcing joint that drill bit is strengthened in front connector with coal petrography step by step is connect, after Connector is connect with Coal-Rock Bits.
5. reinforcing cherry coal rock intensity layered cutting drilling tool according to claim 4, it is characterised in that:The rotary body by Outer ring, rolling element, inner ring composition;Coal petrography is strengthened drill bit and is connect with rotary body inner ring by front connector, Coal-Rock Bits and rotary body Outer ring connects;Coal petrography strengthens drill bit, Coal-Rock Bits any one end is fixed, and the other end, which applies power, to be rotated.
CN201810021040.2A 2018-01-10 2018-01-10 Strengthen cherry coal rock intensity layered cutting drilling method and drilling tool Active CN108278079B (en)

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CN201062490Y (en) * 2007-08-10 2008-05-21 石家庄中煤装备制造有限公司 Anti-collapse highly effective combined drill
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