CN214836117U - Hydraulic reaming drilling tool - Google Patents
Hydraulic reaming drilling tool Download PDFInfo
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- CN214836117U CN214836117U CN202121168304.0U CN202121168304U CN214836117U CN 214836117 U CN214836117 U CN 214836117U CN 202121168304 U CN202121168304 U CN 202121168304U CN 214836117 U CN214836117 U CN 214836117U
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Abstract
The utility model provides a hydraulic reaming drilling tool and a reaming method, wherein a drilling tool main body is of a cylindrical cavity structure, a reaming groove is arranged in the middle of the drilling tool main body, a reaming tooth is arranged in the reaming groove of the drilling tool main body, an end cap is arranged in the drilling tool main body, after the water pressure in a drilling rod is gradually increased, the pressure acting on the end of the end cap is increased, the end cap moves forwards under the action of overcoming the friction force of a sealing ring and the pressure of a snap spring until the front end of the end cap is contacted with the cavity of the drilling tool main body to realize sealing, and the snap spring is in a compression state at the moment; the transmission rack on the drilling tool body drives the half gear at one end of the reaming teeth to rotate as the drilling tool body moves forwards, and the reaming teeth are unfolded to realize reaming; one end of the reaming tooth is provided with a half gear for preventing the opening angle of the reaming tooth from being not more than a certain degree, so that the maximum reaming diameter can be ensured, and the retraction of the reaming tooth is facilitated. After the water pressure is reduced, the main body of the plug moves backwards under the restoring force of the clamp spring and restores to the limiting position of the clamp spring, and at the moment, the reaming teeth are retracted through transmission of the transmission rack.
Description
Technical Field
The utility model relates to a mine gas prevention and cure field especially indicates a water conservancy reaming drilling tool.
Background
The coal seam reaming and drilling of the coal body has the prominent characteristics of rich gas, low permeability, softness, breakage and the like, and the deformation of a drill hole often occurs to cause the blockage of the drill hole, so that the gas extraction is limited, and the gas extraction efficiency is greatly reduced. In order to improve the permeability of coal seams and improve the desorption rate and efficiency of coal bed gas, the hydraulic drilling technology is gradually applied to coal seam mining from the discovery of the last 80 th century till now.
In order to effectively solve the difficult problem of gas extraction of a low-permeability coal seam, a series of enhanced permeability-increasing technologies, such as deep-hole presplitting blasting, hydraulic punching, fracturing, slotting technologies and the like, have been successively researched, but the hydraulic operation can be realized only by pulling out a drilling rod of a drill hole and replacing the drilling rod with corresponding equipment during operation of the hydraulic measures, so that the hydraulic measures have the disadvantages of low efficiency, long time consumption, increased labor intensity of workers, underground production efficiency and the like.
In order to ensure the safety requirement of a mine and improve the gas extraction rate, a method for increasing the diameter of a drilled hole is often adopted, but the traditional hole expanding device needs to replace a cutter manually, the efficiency is low, and the labor intensity of workers in underground construction is overlarge. The technology for cutting the coal wall and expanding the hole by the high-pressure water jet still has an optimized space under special conditions, and particularly when the hardness of a coal seam is high, hydraulic punching and hole-making equipment is weak. There is therefore a need for a new reaming installation to solve the problems encountered.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the prior art, the utility model provides a water conservancy reaming drilling tool, its simple structure, convenient operation under the condition that need not change reamer length, can adapt to the demand of different reaming diameters, can reduce gas drainage time, improves gas drainage efficiency.
The technical scheme of the utility model is realized like this:
a hydraulic reamer tool comprising: the drilling tool comprises a drilling tool main body, a reaming tooth and a plug, wherein the drilling tool main body is of a cylindrical cavity structure, a reaming groove is formed in the middle of the drilling tool main body, the reaming tooth is installed in the reaming groove of the drilling tool main body, and the plug is installed inside the drilling tool main body.
Furthermore, the outer diameter of the drilling tool main body is consistent with that of a matched drill rod, the front end of the drilling tool main body is a drill bit joint, a conical external thread is matched with a conventional drill bit, the rear end of the drilling tool main body is a drill rod joint, and a conical internal thread is matched with the drill rod external thread.
Furthermore, the reaming teeth are of a conical structure and are symmetrically distributed, the reaming teeth can rotate around the center of the pin shaft through fixed installation of the rotating pin shaft, an alloy sheet is installed on one side of the conical surface of the reaming teeth, the effect of cutting coal bodies is achieved in the rotating process of the drilling tool, and the rotating fixed ends of the reaming teeth are of a half-gear structure and are matched with the transmission racks in the plugs.
Further, the end cap comprises a spring, a sealing ring, a transmission rack, a clamp spring and a hole sealing screw, the spring is sleeved at one end of the small diameter of the end cap, the sealing ring is installed in a main body sealing groove of the end cap, the transmission rack is symmetrically distributed on the outer side wall of the middle part of the end cap, the hole sealing screw is installed in a threaded hole of the rear end face of the end cap, the end cap is positioned by the clamp spring, and the clamp spring is installed in a clamping groove of the drilling tool main body.
Further, the plug is of a cylindrical cavity structure, the front end of the plug is provided with a water outlet hole, the rear end of the plug is provided with a water inlet hole and a sealable water inlet hole, and the middle part of the side wall of the plug is provided with a reaming tooth water outlet hole; the transmission racks (33) are symmetrically distributed on the outer side of the plug and are matched with the half gear at one end of the expanding tooth to move; the water inlet holes can be sealed and distributed symmetrically and circumferentially, and the movement stroke can be adjusted by installing the number of the sealing screws according to the requirements of the reaming water pressure and the whole mechanism.
The utility model has the advantages that: the utility model integrates the conventional drilling and reaming into a whole, and the conventional drilling adopts low-pressure water in the process, so that the drill rod body can be cooled, and the powder discharge in the hole is ensured; and (3) adopting high-pressure water during reaming, opening the reaming teeth and cutting the coal body. The integration of drilling and reaming can be realized through the conversion of water pressure, and the problems of complex drill bit replacement, high labor intensity of workers, low efficiency and the like of the traditional equipment are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
in the drawings: 1-drilling tool main body, 2-reaming teeth, 3-plugs, 11-drill bit joints, 12-drill rod joints, 21-rotating pin shafts, 31-springs, 32-sealing rings, 33-transmission racks, 34-snap springs, 35-hole sealing screws, 311-front-end water outlet holes, 312-middle water outlet holes, 313-sealable water inlet holes and 314-main water inlet holes
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
A hydraulic reamer tool as shown in fig. 1, comprising: the drilling tool comprises a drilling tool main body 1, expanding teeth 2 and a plug 3, wherein the drilling tool main body 1 is of a cylindrical cavity structure, an expanding groove is formed in the middle of the drilling tool main body, the expanding teeth 2 are installed in the expanding groove of the drilling tool main body 1, and the plug 3 is installed inside the drilling tool main body 1.
The outer diameter of the drilling tool main body 1 is consistent with that of a matched drilling rod, the front end of the drilling tool main body 1 is provided with a drill bit joint 11 which is matched with a conventional drill bit through a conical external thread, and the rear end of the drilling tool main body 1 is provided with a drill rod joint 12 which is matched with the drill rod external thread through a conical internal thread.
The reaming teeth 2 are of a conical structure and are symmetrically distributed, the reaming teeth 2 can rotate around the center of the pin shaft 21 through the fixed installation of the rotating pin shaft 21, an alloy sheet is installed on one side of the conical surface of the reaming teeth 2, the effect of cutting coal bodies is achieved in the rotating process of a drilling tool, and the rotating fixed end of the reaming teeth 2 is of a half-gear structure and is matched with the transmission rack 33 in the plug 3.
The plug 3 comprises a spring 31, a sealing ring 32, a transmission rack 33, a clamp spring 34 and a hole sealing screw 35, wherein the spring 31 is sleeved at one end of the small diameter of the plug, the sealing ring 32 is installed in a main body sealing groove of the plug 3, the transmission rack 33 is symmetrically distributed on the outer side wall of the middle part of the plug 3, the hole sealing screw 35 is installed in a threaded hole of the rear end face of the plug 3, the plug 3 is positioned by means of the clamp spring 34, and the clamp spring 34 is installed in a clamping groove of the drilling tool main body 1.
The plug 3 is of a cylindrical cavity structure, the front end of the plug is provided with a water outlet 311, the rear end of the plug is provided with a water inlet 314 and a sealable water inlet 313, and the middle part of the side wall of the plug 3 is provided with a reaming tooth water outlet 312; the sealable water inlet holes 313 are symmetrically distributed circumferentially, and the movement stroke can be adjusted by installing the number of the sealing screws 35 according to the reaming water pressure and the requirement of the whole mechanism.
The working principle of the hydraulic reaming drilling tool is as follows: after the water pressure in the drill rod is gradually increased, the pressure acting on the tail end of the plug 3 is increased, the plug 3 moves forwards under the action of overcoming the friction force of the sealing ring 32 and the pressure of the clamp spring 34 until the front end of the plug 3 is contacted with the cavity of the drilling tool main body to realize sealing, and the clamp spring 34 is in a compressed state at the moment; because the drilling tool main body 1 moves forwards, the transmission rack 33 on the drilling tool main body drives the half gear at one end of the reaming teeth 2 to rotate, and the reaming teeth 2 are unfolded to realize reaming; one end of the reamer tooth 2 is provided with a half gear for preventing the opening angle of the reamer tooth from being not more than 90 degrees, so that the maximum diameter of the reamer tooth can be ensured, and the retraction of the reamer tooth 2 is facilitated. After the water pressure is reduced, the main body of the plug 3 moves backwards under the restoring force of the clamp spring 34 and restores to the limiting position of the clamp spring 34, and at the moment, the expanding teeth 2 are retracted through the transmission of the transmission rack 33.
The reaming method for hydraulic reaming is as follows:
firstly, the reaming diameter is calculated according to the reaming requirement, and the method comprises the following steps:
the relationship between the reaming water pressure P and the reaming diameter D is as follows:
the cross-sectional area S of the tail end of the plug is as follows:
wherein D is1Is the diameter of the end of the plug, d1Is the diameter of the central hole of the tip, d2The diameter of the sealed water inlet hole is adopted, and n is the water passing number of the sealed water inlet hole;
the acting force F acting on the plug 3 is as follows:
the movement stroke X of the plug front end clamp spring 34 is as follows:
wherein, FfIs the friction between the seal ring 32 and the drilling tool, and k is the elastic coefficient of the clamp spring;
corresponding travel L of the drive rack1Comprises the following steps:
due to the meshed transmission between the gear and the transmission rack, the corresponding gear rotation angle θ during the movement of the transmission rack 33 is:
wherein r is the radius of a gear reference circle, r is mz/2, m is the gear module, and z is the full gear number;
in the gear rotating process, the reaming teeth are gradually expanded, and the theoretical value of the reaming diameter D is as follows:
wherein D is2The outer diameter of the reaming tool is L, and the length of the reaming teeth is L.
After the above results are obtained, a reaming stage is carried out:
(1) a conventional drilling stage: the drilling tool main body 1 moves synchronously along with the drill rod and the drill bit, at the moment, low-pressure water is conveyed to the reaming drilling tool through the drill rod, flows through the front end water outlet hole 31 from the main water inlet hole 314 at the tail end of the plug 3, and then enters the drill bit from the front end of the drilling tool main body 1, so that the cooling, the lubrication and the drilling and the slag removal of the drill bit are realized, part of water also flows out from the reaming tooth water outlet hole 312 in the middle of the plug 3, and the conventional drilling is not influenced;
(2) and (3) reaming: after reaching the reaming position, high-pressure water is switched at the tail end of the drilling machine, the plug 3 moves forwards under the action of water pressure, the front end of the plug compresses the clamp spring 34 and then is sealed, the transmission rack 33 moves along with the plug 3, and the half gear at the rear end of the reaming tooth 2 meshed with the transmission rack rotates along with the transmission rack, so that the reaming tooth 2 is opened, reaming is realized along with the rotation of the drilling tool, at the moment, the high-pressure water flows through the tooth socket of the reaming tooth 2 through the water outlet hole 312 of the reaming tooth 3, the reaming tooth 2 is lubricated, cooled, drilled and deslagging is carried out, after reaming is finished, the water pressure is switched, the plug 3 recovers the initial state under the action of the clamp spring 34, the reaming tooth 2 is withdrawn along with the high-pressure water, and reaming is finished.
(3) And (3) repeating the step (2) in the drilling or the withdrawal process according to the requirement, and realizing multiple reaming.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A hydraulic reamer tool, comprising: the drilling tool comprises a drilling tool main body (1), expanding teeth (2) and a plug (3), wherein the drilling tool main body (1) is of a cylindrical cavity structure, an expanding groove is formed in the middle of the drilling tool main body, the expanding teeth (2) are installed in the expanding groove of the drilling tool main body (1), and the plug (3) is installed inside the drilling tool main body (1).
2. The hydraulic reamer tool of claim 1, wherein: the outer diameter of the drilling tool main body (1) is consistent with that of a matched drilling rod, the front end of the drilling tool main body (1) is provided with a drill bit joint (11) which is matched with a conventional drill bit through a conical external thread, and the rear end of the drilling tool main body is provided with a drill rod joint (12) which is matched with the drill rod external thread through a conical internal thread.
3. The hydraulic reamer tool of claim 1, wherein: the reaming teeth (2) are of a conical structure and are symmetrically distributed, the reaming teeth (2) are fixedly installed through a rotating pin shaft (21), the reaming teeth (2) can rotate around the center of the rotating pin shaft (21), an alloy sheet is installed on one side of the conical surface of the reaming teeth (2), and the rotating fixed end of the reaming teeth (2) is of a half-gear structure and is matched with a transmission rack (33) in the plug (3).
4. The hydraulic reamer tool of claim 1, wherein: end cap (3) are including spring (31), sealing washer (32), drive rack (33), jump ring (34), hole sealing screw (35), spring (31) cover is in end cap minor diameter one end, install in the main part seal groove of end cap (3) sealing washer (32), drive rack (33) symmetric distribution is on the lateral wall at end cap (3) middle part, hole sealing screw (35) are installed in the rear end face threaded hole of end cap (3), end cap (3) rely on jump ring (34) to fix a position, jump ring (34) are installed in the draw-in groove of drilling tool main part (1).
5. The hydraulic reamer tool of claim 1, wherein: the plug (3) is of a cylindrical cavity structure, the front end of the plug is provided with a water outlet hole (311), the rear end of the plug is provided with a water inlet hole (314) and a sealable water inlet hole (313), and the middle part of the side wall of the plug (3) is provided with a reaming tooth water outlet hole (312); the sealable water inlet holes (313) are symmetrically distributed circumferentially.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121168304.0U CN214836117U (en) | 2021-05-26 | 2021-05-26 | Hydraulic reaming drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121168304.0U CN214836117U (en) | 2021-05-26 | 2021-05-26 | Hydraulic reaming drilling tool |
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| CN214836117U true CN214836117U (en) | 2021-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137181A (en) * | 2021-05-26 | 2021-07-20 | 河南能源化工集团研究总院有限公司 | Hydraulic reaming drilling tool and reaming method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137181A (en) * | 2021-05-26 | 2021-07-20 | 河南能源化工集团研究总院有限公司 | Hydraulic reaming drilling tool and reaming method |
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