CN112098145A - Device and method for drilling coal sample for eliminating thermal effect - Google Patents
Device and method for drilling coal sample for eliminating thermal effect Download PDFInfo
- Publication number
- CN112098145A CN112098145A CN202011164727.5A CN202011164727A CN112098145A CN 112098145 A CN112098145 A CN 112098145A CN 202011164727 A CN202011164727 A CN 202011164727A CN 112098145 A CN112098145 A CN 112098145A
- Authority
- CN
- China
- Prior art keywords
- coring
- core
- rear end
- face
- drilling
- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 82
- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000000694 effects Effects 0.000 title claims abstract description 24
- 238000005070 sampling Methods 0.000 claims abstract description 60
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000009417 prefabrication Methods 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000009826 distribution Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 8
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- 239000004964 aerogel Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 claims 1
- 238000003795 desorption Methods 0.000 abstract description 10
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 11
- 239000002817 coal dust Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a device for eliminating the thermal effect and drilling and sampling coal, which comprises a core bit, a core inner pipe, a core outer pipe, an elastic heat-insulating gasket, a sealing cover and a screwed plug, wherein the core bit is connected with the front end surface of the core outer pipe, the core inner pipe is embedded in the core outer pipe and is abutted against the rear end surface of the core outer pipe through the elastic heat-insulating gasket and is abutted against and communicated with the rear end surface of the core bit, a positioning hole is arranged on the rear end surface of the core outer pipe corresponding to the rear end surface of the core inner pipe, a flow guide hole is arranged on the rear end surface of the core inner pipe, the positioning hole and the. The using method comprises three steps of equipment prefabrication, drilling positioning, coring operation and the like. On one hand, the invention can effectively prevent the heat generated when the drilling equipment rubs with the coal seam structure from influencing and interfering the coal sample; on the other hand can effectively clear up the operation to the buggy in the drilling and sneak into the buggy of getting in the core inner tube in the sampling process, simultaneously, can realize the quick gas desorption of sample back coal core and detect the operation to can realize the quick replacement of trouble spare part.
Description
Technical Field
The invention relates to a coal sample sampling device, in particular to a device for drilling and sampling a coal sample and a sampling method for eliminating a heat effect.
Background
The coal bed gas content is one of the most important basic parameters of coal mines and is also an indispensable basic parameter for coal bed gas exploration and development, and the measuring method is divided into a direct method and an indirect method. Because the indirect method has strict requirements on the sampling process, long measuring period and large accumulated error, the coal bed gas content measurement in China mainly adopts a direct method. The direct method can be divided into a drilling method and a coring pipe method according to different sampling modes. Because the drilling cutting method is used for sampling and crushing the coal sample, the destructiveness to the coal sample is large, the gas loss is large, and the error of the measured coal seam gas content is large. And get the core method and directly bore the coal core through the corer, be favorable to keeping the integrality of getting the coal sample and reduce the gas loss volume of sampling in-process coal sample, so our national standard regulation: the core tube is firstly selected for sampling when the gas content of the coal bed is measured. However, when the coring pipe is used for sampling, a large amount of heat is generated when the coring bit drills a coal sample and the pipe wall of the coring pipe rubs against the coal wall, and the heat is transmitted to the coal core through the coring bit and the pipe wall of the coring pipe, so that the temperature of the coal core is increased, even the coal core is deteriorated, the gas desorption of the coal sample is accelerated, and the gas loss of the coal sample is large.
In addition, in the traditional sampling equipment and method, during coal sample sampling, on one hand, coal dust scattered in a drill hole is easily mixed into the sampling equipment, so that the coal sample is polluted or interfered, and fixed-point sampling of the coal sample is seriously influenced; on the other hand, after the traditional sampling equipment finishes the coal sample collection, the underground coal bed gas content can not be rapidly and directly measured, so that the detection precision is poor, and the detection operation efficiency is low.
Therefore, in order to avoid the influence of the thermal effect on the coal sample in the coring process of the coring pipe and improve the precision and efficiency of the subsequent gas content measurement operation, the device and the method for drilling and taking the coal sample, which eliminate the thermal effect, are urgently needed to be developed so as to meet the requirements of practical use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device and a method for drilling and sampling coal samples to eliminate the heat effect so as to meet the requirement of accurately measuring the gas content of a coal bed.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a device for eliminating the heat effect and drilling and taking a coal sample comprises a core bit, a core inner tube, a core outer tube, an elastic heat-insulating washer, a sealing cover and a screwed plug, wherein the core outer tube and the core inner tube are of a T-shaped tubular structure with axial cross sections, the inner surface and the outer surface of the first half of the core outer tube are provided with connecting threads, the core bit and the core outer tube are coaxially distributed and are connected with the front end surface of the core outer tube, the rear half of the core bit is embedded in the core outer tube and is connected with the inner surface of the core outer tube through the connecting threads, the core inner tube is embedded in the core outer tube and is coaxially distributed with the core outer tube, the outer side surface of the core inner tube is in sliding connection with the inner side surface of the core outer tube, the inner diameter is consistent with the inner diameter of the core bit, the rear end surface of the core inner tube is, get the core outer tube rear end face that the core inner tube rear end face corresponds and set for the position hole, get the core inner tube rear end face and establish the water conservancy diversion hole, the water conservancy diversion hole with get core inner tube coaxial distribution and communicate, the locating hole, water conservancy diversion downthehole surface is established connecting thread and is connected with the plug through connecting thread, the terminal surface inlays in the water conservancy diversion downthehole before the plug, the rear end face is located and gets core outer tube rear end face outer 5 millimeters at least, sealed lid is "T" font slot-shaped structure for axial cross-section, the cladding is outside coring bit and through connecting thread and coring bit.
Furthermore, the rear end face of the coring inner pipe adopts any one of two structures which are embedded in the coring outer pipe and extend out of the outer side of the rear end face of the coring outer pipe through the positioning hole.
Further, get the core inner tube and get the core outer tube within a definite time, get the core inner tube rear end face and adopt and stretch out through the locating hole when getting two kinds of structures of core outer tube rear end face, get the core inner tube rear end face and set for the locating piece, the locating piece with get core inner tube rear end face and be connected and coaxial distribution, the locating piece external diameter is unanimous with the locating hole internal diameter to for getting 10% to 50% of core inner tube internal diameter, the locating piece is the regular polygon columnar structure for the cross section, inlay in the locating hole and with locating hole pore wall sliding connection, the water conservancy diversion hole inlays in the locating piece and with the coaxial distribution of locating piece, water conservancy diversion hole one end with get core inner tube intercommunication, the other end internal.
Furthermore, at least two connecting sliding grooves are formed in the wall of the positioning hole, the connecting sliding grooves are distributed in parallel with the axis of the positioning hole and are uniformly distributed around the axis of the positioning hole, and the positioning hole is connected with the outer surface of the positioning block in a sliding mode through the connecting sliding grooves.
Furthermore, the elastic heat-insulating washer is of a closed annular structure, the width of the elastic heat-insulating washer is 5-20 mm, the front end face and the rear end face of the elastic heat-insulating washer are respectively provided with a limiting groove, the cross section of the elastic heat-insulating washer transversely forms any one of an I-shaped structure and a T-shaped structure through the limiting groove, and the elastic heat-insulating washer is coated outside the rear end face of the coring bit and the front end face and the rear end face of the coring inner tube through the limiting groove.
Furthermore, a compression spring is arranged in the limiting groove, the compression spring is embedded in the limiting groove and is of a columnar structure which is coaxially distributed with the elastic heat-insulating gasket, the rear end face of the compression spring is connected with the bottom of the limiting groove, and the front end face of the compression spring exceeds the side surface of the elastic heat-insulating gasket by 0-10 mm.
Furthermore, the coring inner tube is made of aerogel material based on any one or two of boron nitride and silicon carbide ceramics, and the length of the coring inner tube is not less than 80% of that of the coring outer tube.
Further, sealed lid including bearing substrate, elastic sealing ring, elastic packing ring, shutoff lid, bearing substrate is "T" font structure for axial cross-section, elastic sealing ring and elastic packing ring be with the closed loop ring structure of bearing substrate coaxial distribution, elastic sealing ring at least one, inlay in bearing substrate lateral wall internal surface and along bearing substrate axis direction equipartition, elastic packing ring inlays and is connected with the bearing substrate tank bottom in bearing substrate, bearing substrate is last to establish two at least inspection holes, the inspection hole encircles bearing substrate axis equipartition and with bearing substrate axis parallel distribution, the interval is for getting core inner tube radial 10% -80% between inspection hole and the bearing substrate axis, the inspection hole is connected with the shutoff lid in addition, and the shutoff lid surpasss bearing substrate preceding terminal surface at least 5 millimeters.
The use method of the device for drilling and sampling coal for eliminating the thermal effect comprises the following steps:
s1, prefabricating equipment, namely assembling the coring bit, the coring inner pipe, the coring outer pipe, the elastic heat-insulating washer and the like to complete prefabrication for later use;
s2, drilling and positioning, after the step S1 is completed, firstly, performing preset drilling operation through traditional drilling equipment, withdrawing a drill rod and taking down a traditional drill bit when the drilling depth reaches a sampling preset position, then communicating the front end surface of the drill rod with the rear end surface of the coring outer tube of the invention and propelling the invention, meanwhile, conveying an external high-pressure medium into the coring inner tube of the invention through a flow guide hole of the coring inner tube, enabling the high-pressure medium to flow from back to front along the axis of the coring inner tube and to be discharged from the front end surface of the coring inner tube, and cleaning the interior of the coring inner tube and the bottom of a drill hole corresponding to the front end surface of the invention through the high-pressure medium until the front end surface of the coring drill bit reaches the sampling position;
and S3, coring, wherein after the step S2 is completed, the high-pressure medium is stopped from being introduced into the coring inner pipe, then the coring drill bit is driven to drill and sample the coal seam, the coring drill bit is withdrawn along the axial direction of the drill hole after the drilling and sampling are completed, the front end face of the coring drill bit is plugged through a sealing cover after the front end face of the coring drill bit is withdrawn from the drill hole, finally the coring drill bit is separated from external drill rod equipment and high-pressure medium source equipment, a flow guide hole behind the coring inner pipe is plugged and sealed through a screwed plug, and the coal sample in the coring inner pipe is sealed together with the sealing cover, so that the coal sample sampling operation and the sealed storage are completed.
Further, in the step S2, the high-pressure medium provided by the external high-pressure medium source is high-pressure water, and the pressure of the high-pressure medium is not less than 1.5 times of the feeding force applied to the coring outer tube.
Further, in the step S3, after the coring operation of the coal sample is completed, the obtained coal sample is directly communicated with an external gas desorption measuring instrument through the detection hole of the sealing cover of the present invention, so that the gas desorption measuring operation can be performed, and the measurement result can be statistically recorded.
On one hand, the sampling operation efficiency is high, the influence and the interference of heat generated when the drilling equipment drills the coal sample can be effectively prevented in the sampling process, the sampled coal sample can be directly used for subsequent desorption detection operation, and the coring-desorption integration is realized, so that the gas loss of the coal sample in the sampling process is effectively reduced, and the accuracy and the reliability of the subsequent coal bed gas content determination are greatly improved; on the other hand, the coal dust in the drill hole and the coal dust mixed into the coring inner pipe can be effectively cleaned in the sampling process, the coal dust at other positions of the drill hole is prevented from being mixed into a coal sample to be collected to cause interference, and meanwhile, the quick replacement of fault parts can be realized, so that the flexibility, sampling accuracy, universality, stability and fault removal rate of the device are greatly improved.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the rear end face of the coring inner tube of the present invention positioned within the coring outer tube;
FIG. 2 is a schematic view of the rear end face of the inner coring tube of the present invention positioned outside the outer coring tube;
FIG. 3 is a schematic view of a structure of an elastic heat insulating gasket;
FIG. 4 is a schematic view of another construction of the elastic heat insulating gasket;
FIG. 5 is a schematic view of a positioning hole structure;
FIG. 6 is a flow chart of the method of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in figures 1-5, a device for eliminating thermal effect and drilling and sampling coal comprises a core bit 1, a core inner tube 2, a core outer tube 3, an elastic heat-insulating washer 4, a sealing cover 5 and a plug 6, wherein the core outer tube 3 and the core inner tube 2 are both of a T-shaped tubular structure with axial cross sections, the inner surface and the outer surface of the front half part of the core outer tube 3 are both provided with connecting threads 7, the core bit 1 and the core outer tube 3 are coaxially distributed and are connected with the front end surface of the core outer tube 3, the rear half part of the core bit 1 is embedded in the core outer tube 3 and is connected with the inner surface of the core outer tube 3 through the connecting threads 7, the core inner tube 2 is embedded in the core outer tube 3 and is coaxially distributed with the core outer tube 3, the outer side surface of the core inner tube 2 is slidably connected with the inner side surface of the outer tube 3, the inner diameter is consistent with the inner diameter of, preceding terminal surface offsets and feeds through with 1 rear end face of coring bit through at least one elasticity thermal-insulated packing ring 4, coring 3 rear end faces of coring outer tube that 2 rear end faces of inner tube correspond set for the locating hole 8, coring 2 rear end faces of inner tube establish water conservancy diversion hole 9, water conservancy diversion hole 9 and coring 2 coaxial distributions in inner tube and intercommunication, the locating hole 8, water conservancy diversion hole 9 internal surface is established connecting thread 7 and is connected with plug 6 through connecting thread 7, the terminal surface inlays in water conservancy diversion hole 9 before the plug 6, the rear end face is located coring 2 outer 2 rear end faces of outer tube at least 5 millimeters, sealed lid 6 is "T" font slot-like structure for axial cross-section, the cladding is outside coring bit 1 and through connecting thread 7 and coring bit 1 surface connection.
In this embodiment, the rear end face of the coring inner tube 2 is embedded in the coring outer tube 2 and extends out of any one of two structures outside the rear end face of the coring outer tube 2 through the positioning hole 8.
Further, get the core inner tube and get the core outer tube within a definite time, get core inner tube rear end face and adopt and stretch out through the locating hole and get core outer tube rear end face, 2 rear end faces of core inner tube set for the position piece 10, locating piece 10 with get core inner tube 2 rear end face and be connected and coaxial distribution, locating piece 10 external diameter is unanimous with 8 internal diameters of locating hole to 10% -50% for getting core inner tube 2 internal diameters, locating piece 10 is the regular polygon column structure for the cross section, inlay in locating hole 8 and with 8 pore wall sliding connection of locating hole, water conservancy diversion hole 9 inlays in locating piece 10 and with 10 coaxial distribution of locating piece, water conservancy diversion hole 9 one end with get core inner tube 2 intercommunication, the other end internal surface is established connecting thread 7 and is connected with plug 6 through connecting thread 7.
Preferably, at least two connecting sliding grooves 11 are formed in the wall of the positioning hole 8, the connecting sliding grooves 11 are distributed in parallel with the axis of the positioning hole 8 and are uniformly distributed around the axis of the positioning hole 8, and the positioning hole 8 is connected with the outer surface of the positioning block 10 in a sliding mode through the connecting sliding grooves 11.
In this embodiment, the elastic heat insulating washer 4 is a closed ring structure, the width is 5-20 mm, the front end surface and the rear end surface of the elastic heat insulating washer 4 are both provided with the limiting groove 12, the cross section of the elastic heat insulating washer 4 forms any one of an i-shaped structure and a T-shaped structure through the limiting groove 12, and the elastic heat insulating washer is coated outside the rear end surface of the coring bit 1 and the front end surface and the rear end surface of the coring inner tube 2 through the limiting groove 12.
Preferably, the limit groove 12 is internally provided with a compression spring 13, the compression spring 13 is embedded in the limit groove 12 and is of a columnar structure which is coaxially distributed with the elastic heat-insulating gasket 4, the rear end face of the compression spring 13 is connected with the bottom of the limit groove 12, and the front end face of the compression spring exceeds the side surface of the elastic heat-insulating gasket 4 by 0-10 mm.
In this embodiment, the coring inner tube 2 is an aerogel material based on one or two of boron nitride and silicon carbide ceramics, and the length of the coring inner tube 2 is not less than 80% of the length of the coring outer tube 3.
In particular, the sealing cap 5 comprises a bearing base 51, an elastic sealing ring 52, an elastic gasket 53 and a blocking cap 54, the bearing base body 51 is of a T-shaped structure in axial section, the elastic sealing rings 52 and the elastic gaskets 53 are of a closed annular structure which is coaxially distributed with the bearing base body 51, at least one elastic sealing ring 52 is embedded in the inner surface of the side wall of the bearing base body 51 and is uniformly distributed along the axial direction of the bearing base body 51, the elastic gasket 53 is embedded in the bearing base body 51 and connected with the groove bottom of the bearing base body 51, at least two detection holes 55 are arranged on the bearing base body 51, the detection holes 55 are uniformly distributed around the axis of the bearing base body 51 and are distributed in parallel with the axis of the bearing base body 51, the distance between the detection hole 55 and the axis of the bearing matrix 51 is 10-80% of the radius of the coring inner tube 2, the detection hole 55 is further connected to the plugging cover 54, and the plugging cover 54 exceeds the front end surface of the carrier substrate 51 by at least 5 mm.
As shown in fig. 6, a method for using the device for drilling and sampling coal for eliminating thermal effect comprises the following steps:
s1, prefabricating equipment, namely assembling the coring bit, the coring inner pipe, the coring outer pipe, the elastic heat-insulating washer and the like to complete prefabrication for later use;
s2, drilling and positioning, after the step S1 is completed, firstly, performing preset drilling operation through traditional drilling equipment, withdrawing a drill rod and taking down a traditional drill bit when the drilling depth reaches a sampling preset position, then communicating the front end surface of the drill rod with the rear end surface of the coring outer tube of the invention and propelling the invention, meanwhile, conveying an external high-pressure medium into the coring inner tube of the invention through a flow guide hole of the coring inner tube, enabling the high-pressure medium to flow from back to front along the axis of the coring inner tube and to be discharged from the front end surface of the coring inner tube, and cleaning the interior of the coring inner tube and the bottom of a drill hole corresponding to the front end surface of the invention through the high-pressure medium until the front end surface of the coring drill bit reaches the sampling position;
and S3, coring, wherein after the step S2 is completed, the high-pressure medium is stopped from being introduced into the coring inner pipe, then the coring drill bit is driven to drill and sample the coal seam, the coring drill bit is withdrawn along the axial direction of the drill hole after the drilling and sampling are completed, the front end face of the coring drill bit is plugged through a sealing cover after the front end face of the coring drill bit is withdrawn from the drill hole, finally the coring drill bit is separated from external drill rod equipment and high-pressure medium source equipment, a flow guide hole behind the coring inner pipe is plugged and sealed through a screwed plug, and the coal sample in the coring inner pipe is sealed together with the sealing cover, so that the coal sample sampling operation and the sealed storage are completed.
In this embodiment, in the step S2, the high-pressure medium provided by the external high-pressure medium source is high-pressure water, and the pressure of the high-pressure medium is not less than 1.5 times of the feeding force applied to the coring outer tube.
Meanwhile, in the step S3, after the coring operation of the coal sample is completed, the obtained coal sample is directly communicated with an external gas desorption measuring instrument through the detection hole of the sealing cover of the present invention, so that the gas desorption measuring operation can be performed, and the measurement result can be statistically recorded.
During operation, on one hand, the influence of cutting heat and friction heat generated during drilling operation on the coal sample is effectively avoided through the self heat insulation characteristics of the coring inner pipe and the elastic heat insulation gasket, and the increase of the loss of coal sample gas caused by the temperature rise of the coal sample is prevented; on the other hand, after sampling is finished, the inner core tube and the outer core tube after sampling is directly plugged through the sealing cover and the screwed plug, so that the defects that the coal sample structure is seriously damaged and gas is seriously scattered and lost after the coal sample is separated from the sampling equipment by the traditional sampling equipment after sampling is finished are effectively overcome, the consistency of the coal sample structure and the gas content parameter after sampling and the consistency of the coal sample structure and the gas content parameter in a natural stratum are improved, and the precision of subsequent gas content determination operation is effectively improved.
In addition, in the process of penetrating into the sampling position along the drill hole, impurities which collapse and fall in the drill hole are cleaned through the high-pressure medium, and are prevented from being mixed into the coring inner tube to cause coal sample pollution and influence the precision of the subsequent sampling detection operation.
On one hand, the sampling operation efficiency is high, the influence and the interference of heat generated when the drilling equipment drills the coal sample can be effectively prevented in the sampling process, the sampled coal sample can be directly used for subsequent desorption detection operation, and the coring-desorption integration is realized, so that the gas loss of the coal sample in the sampling process is effectively reduced, and the accuracy and the reliability of the subsequent coal bed gas content determination are greatly improved; on the other hand, the coal dust in the drill hole and the coal dust mixed into the coring inner pipe can be effectively cleaned in the sampling process, the coal dust at other positions of the drill hole is prevented from being mixed into a coal sample to be collected to cause interference, and meanwhile, the quick replacement of fault parts can be realized, so that the flexibility, sampling accuracy, universality, stability and fault removal rate of the device are greatly improved.
It will be appreciated by persons skilled in the art that the present invention is not limited by the embodiments described above. The foregoing embodiments and description have been presented only to illustrate the principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention. Such variations and modifications are intended to be within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A device for eliminating thermal effect and drilling coal sample is characterized in that: the device of getting coal appearance that creeps into of elimination fuel effect is including getting the core bit, getting the core inner tube, getting the core outer tube, elasticity heat insulating washer, sealed lid and plug, get the core outer tube and get the core inner tube and be axial cross-section and be "T" font tubular structure, wherein it all establishes connecting thread to get core outer tube first half internal surface and surface, get the core bit with get core outer tube coaxial distribution and with get core outer tube preceding terminal surface and be connected, and get core bit latter half inlay in getting the core outer tube and through connecting thread and get core outer tube internal surface connection, get the core inner tube and inlay in getting the core outer tube and with getting core outer tube coaxial distribution, get core inner tube lateral surface and get core outer tube medial surface sliding connection, the internal diameter is unanimous with getting the core bit internal diameter, just the inner tube rear end face offsets with getting the core outer tube rear end face through at least one elasticity heat insulating washer, and get, get the coring outer tube rear end face that core inner tube rear end face corresponds and set for the position hole, get the coring inner tube rear end face and establish the water conservancy diversion hole, and water conservancy diversion hole and the coaxial distribution of coring inner tube and intercommunication, the locating hole establishes connecting thread and is connected with the plug through connecting thread with the downthehole surface of water conservancy diversion, the terminal surface inlays in the water conservancy diversion downthehole before the plug, and the rear end face is located and gets the outer 5 millimeters at least of coring outer tube rear end face, sealed lid is "T" font slot-shaped structure for axial cross-section, and the cladding is outside the coring bit and is connected with coring bit.
2. The device for drilling and sampling coal for eliminating thermal effect of claim 1 is characterized in that: the rear end face of the coring inner pipe is embedded in the coring outer pipe and extends out of any one of two structures outside the rear end face of the coring outer pipe through the positioning hole.
3. The device for drilling and sampling coal for eliminating thermal effect of claim 2 is characterized in that: get the core inner tube and get the core outer intertube, get core inner tube rear end face and adopt and stretch out when getting two kinds of structures of core outer tube rear end face through the locating hole, get core inner tube rear end face and set for the locating piece, the locating piece with get core inner tube rear end face and be connected and coaxial distribution, the locating piece external diameter is unanimous with the locating hole internal diameter to for getting 10% to 50% of core inner tube internal diameter, the locating piece is personally submitted regular polygon columnar structure for the cross section, inlay in the locating hole and with locating hole pore wall sliding connection, the water conservancy diversion hole inlay in the locating piece and with the coaxial distribution of locating piece, water conservancy diversion hole one end with get core inner tube intercommunication, the other end internal surface is.
4. The device for drilling and sampling coal for eliminating thermal effect of claim 3 is characterized in that: the locating hole wall on establish two at least connection spouts, connect spout and locating hole axis parallel distribution and encircle the locating hole axis equipartition, just the locating hole passes through the connection spout and locating piece surface sliding connection.
5. The device for drilling and sampling coal for eliminating thermal effect of claim 1 is characterized in that: the elastic heat-insulating washer is of a closed annular structure, the width of the elastic heat-insulating washer is 5-20 mm, the front end face and the rear end face of the elastic heat-insulating washer are respectively provided with a limiting groove, the cross section of the elastic heat-insulating washer transversely forms any one of an I-shaped structure and a T-shaped structure through the limiting grooves, and the elastic heat-insulating washer is coated outside the rear end face of the coring bit and the front end face and the rear end face of the coring inner tube through the limiting grooves.
6. The device for drilling and sampling coal for eliminating thermal effect of claim 5 is characterized in that: the limiting groove is internally provided with a compression spring which is embedded in the limiting groove and is of a columnar structure which is coaxially distributed with the elastic heat-insulating gasket, the rear end face of the compression spring is connected with the bottom of the limiting groove, and the front end face of the compression spring exceeds the side surface of the elastic heat-insulating gasket by 0-10 mm.
7. The device for drilling and sampling coal for eliminating thermal effect of claim 1 is characterized in that: the coring inner pipe is made of aerogel material based on any one or two of boron nitride and silicon carbide ceramics, and the length of the coring inner pipe is not less than 80% of that of the coring outer pipe.
8. The device for drilling and sampling coal for eliminating thermal effect of claim 1 is characterized in that: the sealed lid including bearing substrate, elastic sealing ring, elastic gasket, shutoff lid, bearing substrate is "T" font structure for axial cross-section, elastic sealing ring and elastic gasket be with the closed annular structure of bearing substrate coaxial distribution, elastic sealing ring at least one, inlay in bearing substrate lateral wall internal surface and along bearing substrate axis direction equipartition, elastic gasket inlays in bearing substrate and is connected with the bearing substrate tank bottom, establish two at least inspection holes on the bearing substrate, the inspection hole encircles bearing substrate axis equipartition and with bearing substrate axis parallel distribution, the interval is for getting core inner tube radial 10% -80% between inspection hole and the bearing substrate axis, the inspection hole is connected with the shutoff lid in addition, and the shutoff lid surpasss bearing substrate preceding terminal surface at least 5 millimeters.
9. The use method of the device for drilling and sampling coal for eliminating the thermal effect is characterized in that: the use method of the device for drilling and sampling the coal sample for eliminating the thermal effect comprises the following steps:
s1, prefabricating equipment, namely assembling the coring bit, the coring inner pipe, the coring outer pipe, the elastic heat-insulating washer and the like to complete prefabrication for later use;
s2, drilling and positioning, after the step S1 is completed, firstly, performing preset drilling operation through traditional drilling equipment, withdrawing a drill rod and taking down a traditional drill bit when the drilling depth reaches a sampling preset position, then communicating the front end surface of the drill rod with the rear end surface of the coring outer tube of the invention and propelling the invention, meanwhile, conveying an external high-pressure medium into the coring inner tube of the invention through a flow guide hole of the coring inner tube, enabling the high-pressure medium to flow from back to front along the axis of the coring inner tube and to be discharged from the front end surface of the coring inner tube, and cleaning the interior of the coring inner tube and the bottom of a drill hole corresponding to the front end surface of the invention through the high-pressure medium until the front end surface of the coring drill bit reaches the sampling position;
and S3, coring, wherein after the step S2 is completed, the high-pressure medium is stopped from being introduced into the coring inner pipe, then the coring drill bit is driven to drill and sample the coal seam, the coring drill bit is withdrawn along the axial direction of the drill hole after the drilling and sampling are completed, the front end face of the coring drill bit is plugged through a sealing cover after the front end face of the coring drill bit is withdrawn from the drill hole, finally the coring drill bit is separated from external drill rod equipment and high-pressure medium source equipment, a flow guide hole behind the coring inner pipe is plugged and sealed through a screwed plug, and the coal sample in the coring inner pipe is sealed together with the sealing cover, so that the coal sample sampling operation and the sealed storage are completed.
10. The use method of the device for drilling and sampling coal for eliminating thermal effect in claim 1 is characterized in that: in the step S2, the high-pressure medium provided by the external high-pressure medium source is high-pressure water, and the pressure of the high-pressure medium is not less than 1.5 times of the feeding force applied to the coring outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164727.5A CN112098145A (en) | 2020-10-27 | 2020-10-27 | Device and method for drilling coal sample for eliminating thermal effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164727.5A CN112098145A (en) | 2020-10-27 | 2020-10-27 | Device and method for drilling coal sample for eliminating thermal effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112098145A true CN112098145A (en) | 2020-12-18 |
Family
ID=73784805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011164727.5A Pending CN112098145A (en) | 2020-10-27 | 2020-10-27 | Device and method for drilling coal sample for eliminating thermal effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112098145A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353952A (en) * | 2008-09-01 | 2009-01-28 | 中国矿业大学 | Coring method and apparatus for extracting downhole projecting coal bed integral coal core |
| CN201497653U (en) * | 2009-04-01 | 2010-06-02 | 煤矿瓦斯治理国家工程研究中心 | Coal core sampler |
| WO2012065295A1 (en) * | 2010-11-15 | 2012-05-24 | 湖南汉寿中煤科技有限公司 | System and method for gas drainage and outburst prevention in coal seam by drill-cut linkage of long drilling hole and high pressure water jet |
| CN105201418A (en) * | 2015-10-16 | 2015-12-30 | 平安开诚智能安全装备有限责任公司 | Coring drill pipe and coring device |
| CN106223886A (en) * | 2016-09-08 | 2016-12-14 | 华北科技学院 | The device and method taking coal core is crept in a kind of water-filling pressurize cooling |
| CN106441981A (en) * | 2016-08-30 | 2017-02-22 | 中煤科工集团重庆研究院有限公司 | Coal sample drilling sealing detection device |
| CN106769180A (en) * | 2016-12-06 | 2017-05-31 | 江苏中煤矿山设备有限公司 | A kind of coring device and its coring process |
| CN206540716U (en) * | 2017-03-02 | 2017-10-03 | 山西省地质矿产研究院 | Gas content fixed point sampling device |
| CN109916663A (en) * | 2019-04-18 | 2019-06-21 | 中煤科工集团重庆研究院有限公司 | A kind of dislocation closed type sealed sampling device and its application method |
| CN209586311U (en) * | 2019-02-28 | 2019-11-05 | 湖南科技大学 | A kind of standard coring device for fractured coal and rock sample |
| CN111122238A (en) * | 2020-02-27 | 2020-05-08 | 焦作煤业（集团）有限责任公司 | While-drilling fixed-point airtight sampling device and sampling method |
| CN213336873U (en) * | 2020-10-27 | 2021-06-01 | 河南理工大学 | Device for drilling and sampling coal sample by eliminating thermal effect |
-
2020
- 2020-10-27 CN CN202011164727.5A patent/CN112098145A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353952A (en) * | 2008-09-01 | 2009-01-28 | 中国矿业大学 | Coring method and apparatus for extracting downhole projecting coal bed integral coal core |
| CN201497653U (en) * | 2009-04-01 | 2010-06-02 | 煤矿瓦斯治理国家工程研究中心 | Coal core sampler |
| WO2012065295A1 (en) * | 2010-11-15 | 2012-05-24 | 湖南汉寿中煤科技有限公司 | System and method for gas drainage and outburst prevention in coal seam by drill-cut linkage of long drilling hole and high pressure water jet |
| CN105201418A (en) * | 2015-10-16 | 2015-12-30 | 平安开诚智能安全装备有限责任公司 | Coring drill pipe and coring device |
| CN106441981A (en) * | 2016-08-30 | 2017-02-22 | 中煤科工集团重庆研究院有限公司 | Coal sample drilling sealing detection device |
| CN106223886A (en) * | 2016-09-08 | 2016-12-14 | 华北科技学院 | The device and method taking coal core is crept in a kind of water-filling pressurize cooling |
| CN106769180A (en) * | 2016-12-06 | 2017-05-31 | 江苏中煤矿山设备有限公司 | A kind of coring device and its coring process |
| CN206540716U (en) * | 2017-03-02 | 2017-10-03 | 山西省地质矿产研究院 | Gas content fixed point sampling device |
| CN209586311U (en) * | 2019-02-28 | 2019-11-05 | 湖南科技大学 | A kind of standard coring device for fractured coal and rock sample |
| CN109916663A (en) * | 2019-04-18 | 2019-06-21 | 中煤科工集团重庆研究院有限公司 | A kind of dislocation closed type sealed sampling device and its application method |
| CN111122238A (en) * | 2020-02-27 | 2020-05-08 | 焦作煤业（集团）有限责任公司 | While-drilling fixed-point airtight sampling device and sampling method |
| CN213336873U (en) * | 2020-10-27 | 2021-06-01 | 河南理工大学 | Device for drilling and sampling coal sample by eliminating thermal effect |
Non-Patent Citations (1)
| Title |
|---|
| 张宏图;魏建平;王云刚;李辉;: "煤层瓦斯含量测定定点取样方法研究进展", 中国安全生产科学技术, no. 01, 30 January 2016 (2016-01-30), pages 186 - 192 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106677701A (en) | Engineering geological drilling construction method based on thin-walled drilling tool | |
| GB2465504B (en) | Expansion and sensing tool | |
| CN108547614B (en) | Pressure-maintaining airtight coal sample collection device and collection method | |
| CN111335837B (en) | Pressure-maintaining coring inner barrel for coal rock | |
| CN206756535U (en) | Gas sampler is used in a kind of coal bed gas probing | |
| CN104764625B (en) | A kind of coal seam low temperature sampler and method | |
| CN213336873U (en) | Device for drilling and sampling coal sample by eliminating thermal effect | |
| CN112593882B (en) | Rope directional coring drilling device with composite function | |
| CN216524937U (en) | Drilling and taking integrated mining airtight sampling device | |
| CN113266347B (en) | Near-bit coal seam gas parameter while-drilling comprehensive measurement device and method | |
| CN202865815U (en) | Novel static sounding feeler lever | |
| CN112098145A (en) | Device and method for drilling coal sample for eliminating thermal effect | |
| CN114199621A (en) | Drilling and taking integrated mining airtight sampling device and sampling method | |
| CN212272167U (en) | While-drilling well leakage prediction and leakage point measurement nipple | |
| CN203572747U (en) | Hydraulic-pressure-type high-pressure pressurized water tester with double plugs | |
| CN206144551U (en) | Water pressure test in borehole system | |
| CN209780814U (en) | Semi-closed pipe coring equipment for water guide crack belt exploration drilling | |
| CN207829814U (en) | A kind of single tube circulation temperature lowering core bit | |
| CN108693069B (en) | Drilling coal dust gas desorption characteristic parameter measurement while drilling device | |
| CN204225875U (en) | A kind of Fast Measurement coal-bed gas pressure device | |
| CN209342415U (en) | A kind of underground coal mine sampler | |
| CN204495593U (en) | A kind of coal seam low temperature sampler | |
| CN202064835U (en) | Combined drilling tool used for pre-drilling lateral loading test | |
| CN202483513U (en) | Sliding sleeve for separate layer reconstruction | |
| CN211201820U (en) | Petroleum drilling coring device |
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 |