CN204729016U - A kind of multipurpose drilling rod - Google Patents

A kind of multipurpose drilling rod Download PDF

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Publication number
CN204729016U
CN204729016U CN201520412975.5U CN201520412975U CN204729016U CN 204729016 U CN204729016 U CN 204729016U CN 201520412975 U CN201520412975 U CN 201520412975U CN 204729016 U CN204729016 U CN 204729016U
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CN
China
Prior art keywords
bar
rod
dust suction
water cavity
drill bit
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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.)
Withdrawn - After Issue
Application number
CN201520412975.5U
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Chinese (zh)
Inventor
严欣雨
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Chengdu Chenhong Technology Co Ltd
Original Assignee
Chengdu Chenhong Technology Co Ltd
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Filing date
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Priority to CN201520412975.5U priority Critical patent/CN204729016U/en
Application granted granted Critical
Publication of CN204729016U publication Critical patent/CN204729016U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of multipurpose drilling rod, be provided with brill and cut 1, connecting rod 2, dust suction bar 3, connecting rod 2 one end connects brill and cuts 1, the other end connects dust suction bar 3, Multifunctional drill rod provided by the utility model is provided with high pressure spray discharge orifice, water cavity, air suction opening and turnover air cavity, it can not only realize boring the switching of cutting function, can also collect dust and gas executing and bore while, effectively solve the frequent drilling rod switching difference in functionality in drilling rod work progress and cause inefficiency and execute the problem getting out existing gas exceeding limit and dust harzard.

Description

A kind of multipurpose drilling rod
Technical field
The utility model belongs to technical field of coal exploitation, relate to coal formally exploit before equipment in pre-mash gas extraction passage construction process, particularly the brill of pre-mash gas extraction passage cuts and the gas of ejection, effective collection of dust in boring in work progress.
Background technology
Coal mine gas, dust accident are one of disasters of down-hole, if there is gas, dust accident, not only can heavy damage production environment, and can cause casualties, huge loss is caused to the people, enterprise, country, therefore, elimination gas exceeding limit and dust are the preconditions of pre-gas prevention, dust accident, are also one of important leverages of mine safety production.But, due to geologic sedimentation effect, the toxic and harmfuls such as a large amount of gas are overstock in coal seam, in order to realize safe digging, under normal circumstances, before digging, first to arrange special gas pumping tunnel, adopt underground drill rig construction extraction borehole early excise gas pumping, after extraction is up to standard, digging coal can be started.
The construction in gas pumping tunnel generally includes boring and isolates the multiple working procedures such as coal seam.Concrete grammar uses underground drill rig first to execute the boring of boring certain depth, puts in boring the position, coal seam needing to isolate again after then drilling rod being changed into the drill rod special for isolating coal seam, then adopts water under high pressure to isolate coal seam.Effect is adopted in order to reach good gas pre-drainage, usual requirement boring has certain degree of depth, and the different depth position of boring needs to isolate coal seam, this just needs repeatedly to be exited from boring by drilling rod and the drill rod special repeatedly changed boring drilling rod and isolate coal seam.This drilling rod Renewal process can take a large amount of engineering times, affects programming.In the prior art, because some nervous duration of a project or other reasons, also can adopt only boring and the form of construction work of not cutting, but it is very low to adopt its gas pumping rate of extraction tunnel arranged in this way.Also there is no at present to ensure that the duration can make again the method for extraction tunnel successful.
Simultaneously, in construction extraction borehole process, after particularly many mines enter deep horizontal, coal seam gas-bearing capacity, pressure all will increase, execute and bore spray orifice, even to hole the gas exceeding limit unsafe problems that time delay spray orifice causes, the boring hole problem that collapses is also more and more outstanding, in order to overcome collapse hole and gas exceeding limit problem, have to take pressure wind row powder construction technology, but dust harzard becomes again a new difficult problem.But, in the prior art, not for special gas, the dust processing equipment of these serious problems, therefore execute a large amount of gas, dust in drill-through journey and still can be released in tunnel, cause serious gas exceeding limit, dust exceeding potential safety hazard.
Utility model content
Cause inefficiency to solve the frequent drilling rod switching difference in functionality in existing drilling rod work progress and execute the problem getting out existing gas exceeding limit and dust harzard, the utility model provides a kind of multipurpose drilling rod.
Technical solutions of the utility model are as follows:
A kind of multipurpose drilling rod, is provided with brill and cuts 1, connecting rod 2, dust suction bar 3, and connecting rod 2 one end connects brill and cuts 1, and the other end connects dust suction bar 3.
Brill cuts head (1) and comprises drill bit (1.1), drill bit shaft main body (1.2), drill bit water cavity (1.3), drill bit connection female (1.4), high pressure spray discharge orifice (1.5) and water cavity sealing of hole plug (1.6), drill bit (1.1) is connected the two ends that female (1.4) is separately positioned on drill bit shaft main body (1.2) with drill bit, drill bit water cavity (1.3) is arranged on the axial centre position of drill bit shaft main body (1.2) and runs through drill bit shaft main body (1.2), its one end is conical through-hole, the drill bit shaft main body (1.2) that is arranged on high pressure spray discharge orifice (1.5) goes up and runs through drill bit shaft main body (1.2), water cavity sealing of hole plug (1.6) is arranged in water cavity, the conical through-hole of its shape and drill bit water cavity (1.3) matches, its section maximum gauge is less than the diameter of drill bit water cavity (1.3).Connecting rod 2 be provided with connecting rod water cavity bar wall 2.1, connecting rod air cavity bar wall 2.2, connecting rod water cavity 2.3, high pressure air cavity 2.4, connecting rod connect male 2.5 be connected female 2.6 with connecting rod; Connecting rod water cavity 2.3 is inner at connecting rod water cavity bar wall 2.1, and high pressure air cavity 2.4 is between connecting rod water cavity bar wall 2.1 and connecting rod air cavity bar wall 2.2; Connecting rod connects male 2.5 and is connected the two ends that female 2.6 is separately positioned on connecting rod 2 with connecting rod, and connecting rod connects female 2.6 and comprises the connecting rod water cavity connection female 2.6.1 that is arranged at connecting rod water cavity bar wall 2.1 one end and be arranged at the connecting rod air cavity of connecting rod air cavity bar wall 2.2 with one end and be connected female 2.6.2; Preferably, connecting rod water cavity bar wall 2.1 is designed to tubular shape.
Dust suction bar 3 is provided with dust suction bar water cavity bar wall 3.1, dust suction bar outlet chamber bar wall 3.2, dust suction bar inlet chamber bar wall 3.12, dust suction bar water cavity 3.3, high pressure admission chamber 3.4, high pressure outlet air chamber 3.5, air suction opening 3.6, steady pin 4; Dust suction bar water cavity 3.3 is inner at dust suction bar water cavity bar wall 3.1, and high pressure admission chamber 3.4 is arranged between dust suction bar water cavity bar wall 3.1 and inlet chamber bar wall 3.12, and high pressure outlet air chamber 3.5 is arranged between inlet chamber bar wall 3.12 and outlet chamber bar wall 3.2; The dust suction bar water cavity bar wall connection male 3.7.1 that dust suction bar water cavity bar wall 3.1 two ends are provided with coupling is mutually connected female 3.8.1 with dust suction bar water cavity bar wall, the dust suction bar outlet chamber bar wall connection male 3.7.2 that dust suction bar outlet chamber bar wall 3.2 two ends are provided with mutual coupling is connected female 3.8.2 with dust suction bar outlet chamber bar wall, and the dust suction bar inlet chamber bar wall connection male 3.7.12 that dust suction bar inlet chamber bar wall 3.12 two ends are provided with coupling is mutually connected female 3.8.12 with dust suction bar inlet chamber bar wall; Air suction opening 3.6 is obliquely installed on dust suction bar outlet chamber bar wall 3.2, and what its axis direction was connected male 3.7.2 with itself and dust suction bar outlet chamber is wired to acute angle; Steady pin 4, for fixing each bar wall, makes each bar wall relative position fix; Preferably, dust suction bar water cavity bar wall 3.1 is designed to tubular shape; Preferably, dust suction bar inlet chamber bar wall 3.12 is designed to tubular shape.
Drill bit connection female (1.4) is connected male 2.5 and matches with connecting rod; Connecting rod water cavity connection female 2.6.1 is connected male 3.7.1 with dust suction bar water cavity and matches, and connecting rod air cavity connection female 2.6.2 is connected male 3.7.2 with dust suction bar outlet chamber and matches.
Owing to adopting above technical scheme, Multifunctional drill rod provided by the utility model is provided with high pressure spray discharge orifice, water cavity, air suction opening and turnover air cavity, it can not only realize boring the switching of cutting function, can also collect dust and gas executing and bore while, effectively solve the frequent drilling rod switching difference in functionality in drilling rod work progress and cause inefficiency and execute the problem getting out existing gas exceeding limit and dust harzard.Its operating principle is: in water cavity during hydraulic fluid maintenance normal pressure, drilling rod is holed; When applying high pressure to hydraulic fluid in water cavity, liquid sprays at a high speed from high pressure spray discharge orifice and cuts coal seam; While boring or cutting coal seam, pass into gases at high pressure to high pressure admission chamber, gases at high pressure flow out from high pressure outlet air chamber, and form airflow circulating, dust and gas suck this airflow circulating system by air suction opening thus is excluded.
Accompanying drawing explanation
Fig. 1 is overall longitudinal sectional view of the present utility model;
Fig. 2 bores the longitudinal sectional view cutting head;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the longitudinal sectional view of connecting rod;
Fig. 5 is the B-B sectional view of Fig. 4;
Fig. 6 is the longitudinal sectional view of dust suction bar;
Fig. 7 is the C-C sectional view of Fig. 6.
1, brill cuts head; 1.1, drill bit; 1.2, drill bit shaft main body; 1.3, drill bit water cavity; 1.4, drill bit connects female; 1.5, high pressure spray discharge orifice; 1.6, water cavity sealing of hole plug; 2, connecting rod; 2.1, connecting rod water cavity bar wall; 2.2, connecting rod air cavity bar wall; 2.3, connecting rod water cavity; 2.4, high pressure air cavity; 2.5, connecting rod connects male; 2.6, connecting rod connects female; 2.6.1 connecting rod water cavity connects female; 2.6.2 connecting rod air cavity connects female; 3, dust suction bar; 3.1, dust suction bar water cavity bar wall; 3.2, dust suction bar outlet chamber bar wall; 3.12, dust suction bar inlet chamber bar wall; 3.3, dust suction bar water cavity; 3.4, high pressure admission chamber; 3.5, high pressure outlet air chamber; 3.6, air suction opening; 3.7, dust suction bar connects male; 3.7.1, dust suction bar water cavity connects male; 3.7.12, dust suction bar inlet chamber connects male; 3.7.2, dust suction bar outlet chamber connects male; 3.8, dust suction bar connects female; 3.8.1, dust suction bar water cavity connects female; 3.8.12, dust suction bar inlet chamber connects female; 3.8.2, dust suction bar outlet chamber connects female; 4, steady pin.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
As shown in Figure 1, a kind of multipurpose drilling rod, is provided with brill and cuts 1, connecting rod 2, dust suction bar 3, and connecting rod 2 one end connects brill and cuts 1, and the other end connects dust suction bar 3.
Brill cuts head (1) and comprises drill bit (1.1), drill bit shaft main body (1.2), drill bit water cavity (1.3), drill bit connection female (1.4), high pressure spray discharge orifice (1.5) and water cavity sealing of hole plug (1.6), drill bit (1.1) is connected the two ends that female (1.4) is separately positioned on drill bit shaft main body (1.2) with drill bit, drill bit water cavity (1.3) is arranged on the axial centre position of drill bit shaft main body (1.2) and runs through drill bit shaft main body (1.2), its one end is conical through-hole, the drill bit shaft main body (1.2) that is arranged on high pressure spray discharge orifice (1.5) goes up and runs through drill bit shaft main body (1.2), water cavity sealing of hole plug (1.6) is arranged in water cavity, the conical through-hole of its shape and drill bit water cavity (1.3) matches, its section maximum gauge is less than the diameter of drill bit water cavity (1.3).
In work progress, when needs vertical drilling, the hydraulic fluid in drill bit water cavity 1.3 keeps normal pressure, and the conical through-hole of drill bit water cavity 1.3 does not block by water cavity sealing of hole plug (1.6), and hydraulic fluid flows out from conical through-hole, and drilling rod carries out vertical drilling; When needs level isolates coal seam, drilling rod stops boring, then high pressure is applied to the hydraulic fluid in water cavity, water cavity sealing of hole plug (1.6) is by the compressing of highly pressurised liquid by the bellmouth shutoff of drill bit water cavity 1.3, and hydraulic fluid sputters in high pressure spray discharge orifice 1.5, completes isolating coal seam, border measuring and calculating factually, liquid pressure, when 8-10Pa, can reach expection cutting effect, namely by realizing the adjustment of hydraulic fluid pressure in water cavity holing and the switching of isolating two kinds of mode of operations.
As shown in Figure 4, connecting rod 2 be provided with connecting rod water cavity bar wall 2.1, connecting rod air cavity bar wall 2.2, connecting rod water cavity 2.3, high pressure air cavity 2.4, connecting rod connect male 2.5 be connected female 2.6 with connecting rod; Connecting rod water cavity 2.3 is inner at connecting rod water cavity bar wall 2.1, and high pressure air cavity 2.4 is between connecting rod water cavity bar wall 2.1 and connecting rod air cavity bar wall 2.2; Connecting rod connects male 2.5 and is connected the two ends that female 2.6 is separately positioned on connecting rod 2 with connecting rod, and connecting rod connects female 2.6 and comprises the connecting rod water cavity connection female 2.6.1 that is arranged at connecting rod water cavity bar wall 2.1 one end and be arranged at the connecting rod air cavity of connecting rod air cavity bar wall 2.2 with one end and be connected female 2.6.2; Preferably, connecting rod water cavity bar wall 2.1 is designed to tubular shape, to reduce its air resistance suffered when holing.
Connecting rod 2 cuts 1 and a dust suction bar 3 for connecting brill, to be connected after female 1.4 connects with drill bit when connecting rod connects male 2.5, connecting rod water cavity 2.3 is through with drill bit water cavity 1.3, and connecting rod water cavity 2.3 flows to drill bit water cavity 1.3 for the hydraulic fluid transported by dust suction bar 3; Meanwhile, the high pressure admission chamber 3.4 of dust suction bar 3 is communicated with high pressure outlet air chamber 3.5, to form airflow circulating by high pressure air cavity 2.4.
As shown in Figure 6, dust suction bar 3 is provided with dust suction bar water cavity bar wall 3.1, dust suction bar outlet chamber bar wall 3.2, dust suction bar inlet chamber bar wall 3.12, dust suction bar water cavity 3.3, high pressure admission chamber 3.4, high pressure outlet air chamber 3.5, air suction opening 3.6, steady pin 4, dust suction bar water cavity 3.3 is inner at dust suction bar water cavity bar wall 3.1, and high pressure admission chamber 3.4 is arranged between dust suction bar water cavity bar wall 3.1 and inlet chamber bar wall 3.12, and high pressure outlet air chamber 3.5 is arranged between inlet chamber bar wall 3.12 and outlet chamber bar wall 3.2, the dust suction bar water cavity bar wall connection male 3.7.1 that dust suction bar water cavity bar wall 3.1 two ends are provided with coupling is mutually connected female 3.8.1 with dust suction bar water cavity bar wall, the dust suction bar outlet chamber bar wall connection male 3.7.2 that dust suction bar outlet chamber bar wall 3.2 two ends are provided with coupling is mutually connected female 3.8.2 with dust suction bar outlet chamber bar wall, the dust suction bar inlet chamber bar wall connection male 3.7.12 that dust suction bar inlet chamber bar wall 3.12 two ends are provided with coupling is mutually connected female 3.8.12 with dust suction bar inlet chamber bar wall, because the connection male being arranged at dust suction bar 3 two ends is mated with corresponding connection female, the length of whole drilling rod can be controlled by the quantity increasing dust suction bar 3, air suction opening 3.6 is obliquely installed on dust suction bar outlet chamber bar wall 3.2, and what its axis direction was connected male 3.7.2 with itself and dust suction bar outlet chamber is wired to acute angle, and further, this acute angle is 30 degree, to strengthen its dust suction inspiratory effects, steady pin 4, for fixing each bar wall, makes each bar wall relative position fix, preferably, dust suction bar water cavity bar wall 3.1 is designed to tubular shape, and dust suction bar inlet chamber bar wall 3.12 is designed to tubular shape, to reduce the air resistance in its boring procedure.
Dust suction bar connects male 3.7 and is connected with connecting rod after female 2.6 connects, and dust suction bar water cavity 3.3 is communicated with connecting rod water cavity 2.3, and the hydraulic fluid in dust suction bar water cavity 3.3 is delivered to connecting rod water cavity 2.3; Simultaneously, high pressure admission chamber 3.4 is communicated with by high pressure air cavity 2.4 with high pressure outlet air chamber 3.5, gases at high pressure are passed into from high pressure admission chamber 3.4, after gases at high pressure arrive high pressure air cavity 2.4, return from high pressure outlet air chamber 3.5, form airflow circulating, because high velocity air air pressure is low, dust and gas are entered this airflow circulating by air suction opening 3.6 by absorption, thus are excluded.
Drill bit connection female (1.4) is connected male 2.5 and matches with connecting rod; Connecting rod water cavity connection female 2.6.1 is connected male 3.7.1 with dust suction bar water cavity and matches, connecting rod air cavity connects female 2.6.2 and is connected male 3.7.2 with dust suction bar outlet chamber and matches, brill cuts 1, connecting rod 2 and dust suction bar 3 by these connection males of mutually mating be connected female and connect between two.
Operating principle of the present utility model is: brill cuts after head is connected with dust suction bar by connecting rod, and the water cavity designed in three's axle inside is communicated with, and inlet chamber is communicated with by high pressure air cavity with outlet chamber.In whole work progress, gases at high pressure are passed into high pressure admission chamber, after gases at high pressure arrive high pressure air cavity, return from high pressure outlet air chamber, form airflow circulating, because high velocity air air pressure is low, dust and gas are entered this airflow circulating by air suction opening by absorption, thus are excluded; To holing and isolating the switching of two kinds of mode of operations then by realizing the adjustment of hydraulic fluid pressure in water cavity: when needs vertical drilling, hydraulic fluid in drill bit water cavity 1.3 keeps normal pressure, now the bellmouth of drill bit water cavity 1.3 does not block by water cavity sealing of hole plug (1.6), hydraulic fluid flows out from bellmouth, and drilling rod carries out vertical drilling; When needs level isolates coal seam, drilling rod stops boring, then high pressure is applied to the hydraulic fluid in water cavity, water cavity sealing of hole plug (1.6) by the compressing of highly pressurised liquid by the bellmouth shutoff of drill bit water cavity 1.3, hydraulic fluid sputters in high pressure spray discharge orifice 1.5, completes isolating coal seam, border measuring and calculating factually, liquid pressure, when 8-10Pa, can reach expection cutting effect.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present utility model, should be understood to that protection domain of the present utility model is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from the utility model essence according to these technology enlightenment disclosed in the utility model, and these distortion and combination are still in protection domain of the present utility model.

Claims (5)

1. a multipurpose drilling rod, it is characterized in that: be provided with brill and cut head (1), connecting rod (2), dust suction bar (3), described connecting rod (2) one end connects brill and cuts head (1), and the other end connects dust suction bar (3);
Described brill cuts head (1) and comprises drill bit (1.1), drill bit shaft main body (1.2), drill bit water cavity (1.3), drill bit connection female (1.4), high pressure spray discharge orifice (1.5) and water cavity sealing of hole plug (1.6);
Described drill bit (1.1) is connected the two ends that female (1.4) is separately positioned on drill bit shaft main body (1.2) with drill bit, drill bit water cavity (1.3) is arranged on the axial centre position of drill bit shaft main body (1.2) and runs through drill bit shaft main body (1.2), its one end is conical through-hole, the drill bit shaft main body (1.2) that is arranged on high pressure spray discharge orifice (1.5) goes up and runs through drill bit shaft main body (1.2), water cavity sealing of hole plug (1.6) is arranged in water cavity, the conical through-hole of its shape and drill bit water cavity (1.3) matches, its section maximum gauge is less than the diameter of drill bit water cavity (1.3),
Described connecting rod (2) comprise connecting rod water cavity bar wall (2.1), connecting rod air cavity bar wall (2.2), connecting rod connect male (2.5) be connected female (2.6) with connecting rod;
Described connecting rod water cavity bar wall (2.1) inside is connecting rod water cavity (2.3), be high pressure air cavity (2.4) between connecting rod water cavity bar wall (2.1) and connecting rod air cavity bar wall (2.2), connecting rod connects male (2.5) and is connected the two ends that female (2.6) is separately positioned on connecting rod (2) with connecting rod, connecting rod connects female (2.6) and comprises the connecting rod water cavity being arranged at connecting rod water cavity bar wall (2.1) one end and connect female (2.6.1) and be arranged at the connecting rod air cavity of connecting rod air cavity bar wall (2.2) with one end and be connected female (2.6.2),
Described dust suction bar (3) comprises dust suction bar water cavity bar wall (3.1), dust suction bar outlet chamber bar wall (3.2), dust suction bar inlet chamber bar wall (3.12), air suction opening (3.6) and steady pin (4);
Described dust suction bar water cavity bar wall (3.1) inside is dust suction bar water cavity (3.3), be high pressure admission chamber (3.4) between dust suction bar water cavity bar wall (3.1) and inlet chamber bar wall (3.12), be high pressure outlet air chamber (3.5) between inlet chamber bar wall (3.12) and outlet chamber bar wall (3.2), dust suction bar water cavity bar wall connection male (3.7.1) that described dust suction bar water cavity bar wall (3.1) two ends are provided with coupling is mutually connected female (3.8.1) with dust suction bar water cavity bar wall, dust suction bar outlet chamber bar wall connection male (3.7.2) that described dust suction bar outlet chamber bar wall (3.2) two ends are provided with coupling is mutually connected female (3.8.2) with dust suction bar outlet chamber bar wall, dust suction bar inlet chamber bar wall connection male (3.7.12) that described dust suction bar inlet chamber bar wall (3.12) two ends are provided with coupling is mutually connected female (3.8.12) with dust suction bar inlet chamber bar wall, air suction opening (3.6) is obliquely installed on dust suction bar outlet chamber bar wall (3.2), what its axis direction was connected male (3.7.2) with itself and dust suction bar outlet chamber is wired to acute angle, steady pin (4) is arranged between each bar wall, for fixing each bar wall, each bar wall relative position is fixed,
Described drill bit connection female (1.4) is connected male (2.5) and matches with described connecting rod; Described connecting rod water cavity connection female (2.6.1) is connected male (3.7.1) with described dust suction bar water cavity and matches, and described connecting rod air cavity connection female (2.6.2) is connected male (3.7.2) with described dust suction bar outlet chamber and matches.
2. a kind of multipurpose drilling rod according to claim 1, is characterized in that: described high pressure spray discharge orifice (1.5) is the inside trumpet degree of lip-rounding.
3. a kind of multipurpose drilling rod according to claim 1, is characterized in that: described connecting rod water cavity bar wall (2.1) is designed to tubular shape.
4. a kind of multipurpose drilling rod according to claim 1, is characterized in that: described dust suction bar water cavity bar wall (3.1) is designed to tubular shape.
5. a kind of multipurpose drilling rod according to claim 1, is characterized in that: described dust suction bar inlet chamber bar wall (3.12) is designed to tubular shape.
CN201520412975.5U 2015-06-16 2015-06-16 A kind of multipurpose drilling rod Withdrawn - After Issue CN204729016U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520412975.5U CN204729016U (en) 2015-06-16 2015-06-16 A kind of multipurpose drilling rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520412975.5U CN204729016U (en) 2015-06-16 2015-06-16 A kind of multipurpose drilling rod

Publications (1)

Publication Number Publication Date
CN204729016U true CN204729016U (en) 2015-10-28

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ID=54387375

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520412975.5U Withdrawn - After Issue CN204729016U (en) 2015-06-16 2015-06-16 A kind of multipurpose drilling rod

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104989287A (en) * 2014-12-02 2015-10-21 成都宸鸿科技有限公司 Multipurpose drill pipe
CN105464600A (en) * 2015-12-09 2016-04-06 荣昌精密机械(苏州)有限公司 Dustproof drill rod of rock drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104989287A (en) * 2014-12-02 2015-10-21 成都宸鸿科技有限公司 Multipurpose drill pipe
CN105464600A (en) * 2015-12-09 2016-04-06 荣昌精密机械(苏州)有限公司 Dustproof drill rod of rock drill

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GR01 Patent grant
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20151028

Effective date of abandoning: 20170329