CN116378594A - Anti-blocking coring device suitable for broken stratum - Google Patents
Anti-blocking coring device suitable for broken stratum Download PDFInfo
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- CN116378594A CN116378594A CN202310658908.0A CN202310658908A CN116378594A CN 116378594 A CN116378594 A CN 116378594A CN 202310658908 A CN202310658908 A CN 202310658908A CN 116378594 A CN116378594 A CN 116378594A
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- 238000003466 welding Methods 0.000 claims description 22
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 9
- 239000011435 rock Substances 0.000 abstract description 11
- 239000012634 fragment Substances 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 description 6
- 230000005489 elastic deformation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Geochemistry & Mineralogy (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
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Abstract
The invention relates to an anti-seize coring device suitable for broken stratum, belonging to the technical field of stratum coring; the core barrel comprises a core barrel body, an inner shell and an outer shell, wherein the core barrel body is provided with a connecting seat at the upper end, and a top matching boss is arranged at the upper end of the connecting seat; the inner shell comprises an inner shell body, a core feeding pipe is arranged at the upper end of the inner shell body, a matching groove is formed in the inner top surface of the inner shell body, the core taking pipe body is positioned in the inner shell body, and a top matching boss is inserted into the matching groove; a plurality of groups of outer sliding blocks are arranged on the outer side of the inner shell body, each group of outer sliding blocks is inserted into one guide rail respectively, a plurality of groups of saw-tooth bosses are arranged in outer inclined surface grooves on the end faces of the guide rails, and inclined surfaces on two sides of each outer sliding block are contacted with inclined surfaces of a group of saw-tooth bosses on the bottommost side; the inner shell body is positioned in the outer shell, and the guide rails are positioned in the inner grooves on the inner side surface of the outer shell body; the problem that rock fragments are easy to block a coring barrel when the existing coring device is used for coring is solved.
Description
Technical Field
The invention belongs to the technical field of stratum coring, and particularly relates to an anti-seize coring device suitable for broken stratum.
Background
In units of petroleum geology, coal, ground ore and the like, in the underground geological core acquisition process, along with the continuous advancement of domestic and foreign resource exploitation to the deep part, the exploitation difficulty is gradually increased, and in order to better understand the geological condition of the exploited area, the geology, the landform and the like of the exploited area need to be explored by acquiring the core. When the existing coring device is used for coring in broken stratum or softer stratum, a large amount of rock fragments are generated in the process of rotating the drill bit, and the coring barrel is easily blocked due to the large accumulation of the rock fragments, so that the coring rate is reduced due to deformation and failure of the coring barrel.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides an anti-seize coring device suitable for breaking stratum; the problem that rock fragments are easy to block a coring barrel when the existing coring device is used for coring is solved.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
The anti-blocking coring device comprises a coring barrel, an inner shell and an outer shell, wherein the coring barrel comprises a coring barrel main body, an open slot is formed in the side wall of the coring barrel main body, a circle of latch teeth are arranged at the lower end of the outer side surface of the coring barrel main body, a connecting seat is fixedly arranged at the upper end of the coring barrel main body, and a top matching boss is arranged at the upper end of the connecting seat; the inner shell comprises an inner shell body, a cylindrical core feeding pipe is arranged at the upper end of the inner shell body, a matching groove is formed in the top surface of the inner shell body, the core taking pipe body is positioned in the inner shell body, and a top matching boss is inserted into the matching groove; a plurality of groups of outer sliding blocks are arranged on the outer side of the inner shell body, each group of outer sliding blocks is inserted into one guide rail respectively, a plurality of groups of saw-tooth bosses are arranged in outer inclined surface grooves on the end faces of the guide rails, and inclined surfaces on two sides of each outer sliding block are contacted with inclined surfaces of a group of saw-tooth bosses on the bottommost side; the inner shell body is positioned inside the outer shell, an inner groove is formed in the inner side face of the outer shell body, and the guide rails are positioned inside the inner groove.
Further, the upper end and the lower end of the core barrel main body are kept in an opening state, and the outer side surface of the core barrel main body is a conical cylinder with the taper of 1:10; the side wall of the core barrel main body is provided with a V-shaped open slot which is communicated with the end faces of the upper end and the lower end of the core barrel main body.
Further, the outer side surface of the core barrel main body is close to the lower edge, the bottom matching boss is of a circular ring structure which is horizontally arranged, the clamping teeth are uniformly arranged on the lower end surface of the bottom matching boss and fixedly connected with the bottom matching boss, the clamping teeth are contacted with the outer side surface of the core barrel main body, the clamping teeth are mutually independent, and the lower ends of the clamping teeth exceed the lower end surface of the core barrel.
Further, a plurality of internal lugs and a welding layer are fixedly arranged on the inner side surface of the core barrel main body, the internal lugs and the welding layer are uniformly arranged along the circumference, the internal lugs are arranged in an extending mode along the axis direction of the core barrel main body, and one welding layer is arranged between the upper half sections of every two adjacent internal lugs.
Further, the inner shell body is of a cylindrical structure with openings at the upper end and the lower end, a square notch is formed in the side wall of the inner shell body, inner annular bosses are respectively arranged at the lower edge of the inner side surface of the inner shell body, the inner annular bosses at the lower edge of the inner side surface of the inner shell body are contacted with the outer side surface of the core barrel body, and the lower end surface of each inner annular boss is contacted with the upper end surface of the corresponding bottom matching boss; the open slot of the core barrel main body corresponds to the square notch of the inner shell main body; the space between the inner wall of the inner shell body and the outer wall of the core barrel body is filled with high-elasticity materials.
Further, the shell body comprises an shell body and a core feeding cylinder, the core feeding cylinder is of a cylindrical structure with an upper end and a lower end being open, an inner thread is arranged on the upper portion of the inner side face of the core feeding cylinder, the shell body is of a semi-cylindrical structure with the upper end and the lower end being open, a semi-circular inner groove is arranged on the inner side face of the shell body, and the inner groove is communicated with the radial end face of the inner shell body.
Further, the inner tube is of a cylindrical structure with an upper section and a lower section, and the external thread at the lower end of the outer side surface of the inner tube is in threaded connection with the internal thread in the core feeding tube.
Further, each group of outer sliding blocks comprises two outer sliding blocks which are distributed up and down, the two outer sliding blocks are respectively and fixedly arranged on the outer side face of the inner shell body, a sliding block groove is formed in the outer side face of the inner shell body at the corresponding position of each outer sliding block, a welding block is fixedly arranged at the inner bottom face of each sliding block groove, and the outer sliding blocks are welded on the welding blocks; the upper outer slide block and the lower outer slide block are identical in structure and are composed of an upper layer and a lower layer, wherein the upper layer of the slide block is a rectangular mechanism, the lower layer of the slide block is of an isosceles trapezoid structure, the lower layer of the slide block is welded on the welding block, the lower end of the inner side surface of the upper layer of the slide block is welded on the outer side of the lower layer of the slide block, and the height of the upper layer of the slide block is higher than that of the lower layer of the slide block.
Further, an inner rectangular groove extending vertically is formed in the end face of one side of the guide rail, which faces the inner shell, an outer inclined surface groove is formed in the outer side of the inner rectangular groove, the width of the outer inclined surface groove is larger than that of the inner rectangular groove, six groups of saw-tooth bosses are symmetrically formed in the side walls of the two sides of the outer inclined surface groove from top to bottom, and gaps between the two saw-tooth bosses in each group are sequentially increased from bottom to top; among the six groups of saw-tooth bosses, the upper three groups are upper lead portions, the lower three groups are lower lead portions, the upper lead portions are leads of the upper outer side sliders, and the lower lead portions are leads of the lower outer side sliders.
Further, in the three groups of zigzag bosses of the upper lead part or the lower lead part, the minimum width of the uppermost group of zigzag bosses is equal to the width of the inner rectangular groove, the minimum width of the middle group of zigzag bosses is larger than the width of the inner rectangular groove and smaller than the minimum width of the lowermost group of zigzag bosses, and the connection parts of the two adjacent groups of zigzag bosses are transited through an arc; when the outside slider stretches into in the guide rail, one outside slider of upside is located lead portion, and one side outside slider of downside is located lead portion down, and slider top layer is located inside the inboard rectangle recess of guide rail, and the slider lower part is located inside a set of zigzag boss of bottommost.
Compared with the prior art, the invention has the following beneficial effects:
when the core is clamped, the axial pressure applied to the coring device is larger than a set value, the trapezoid inclined planes at the two sides of the lower layer of the sliding block are respectively contacted with the inclined planes of the zigzag bosses at the two sides to generate elastic deformation, and under the pushing action of the core, the main body of the coring barrel expands outwards to increase the bottom space and relieve the accumulation of chips at the bottom of the coring barrel; on the other hand, in the rising process of the coring device, due to the fact that the width between the two zigzag bosses of the guide rail changes suddenly, the lower layer of the sliding block can recover to be elastically deformed, the coring barrel is vibrated at a specific position, chips can drop due to inertia, the accumulation of the chips in the coring barrel is relieved, and therefore the coring barrel is prevented from being blocked by rock chips, and the coring efficiency is further guaranteed.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a front elevational view of the entirety of the present invention;
FIG. 2 is a schematic perspective view of the entire present invention;
FIG. 3 is a front view of the core barrel;
FIG. 4 is a schematic perspective view of a core barrel;
FIG. 5 is a front view of the inner housing;
FIG. 6 is a schematic perspective view of the inner housing;
FIG. 7 is a front view of the core barrel assembled with the inner housing;
FIG. 8 is a schematic perspective view of the core barrel assembled with the inner housing;
FIG. 9 is a schematic view of the structure of the outside slider;
FIG. 10 is a front view of the guide rail;
FIG. 11 is a schematic perspective view of a rail;
FIG. 12 is a schematic perspective view of the outer housing;
wherein:
1 is a core barrel, 2 is an inner shell, 3 is a guide rail, 4 is an outer shell and 5 is an inner tube;
101 is a latch, 102 is a bottom matching boss, 103 is a core barrel main body, 104 is a connecting seat, 105 is a top matching boss, 106 is an unloading groove, 107 is an open groove, 108 is an internal bump, and 109 is a welding layer;
201 is an inner shell main body, 202 is a core feeding pipe, 203 is an outer sliding block, and 204 is a matching groove;
401 is a slide groove, 402 is a welding block, 403 is a slide lower layer, and 404 is a slide upper layer;
501 is an inner rectangular groove, 502 is an outer inclined groove, 503 is a rock debris prevention baffle, 504 is an upper lead part, and 505 is a lower lead part;
601 is an internal thread, 602 is a core feeding cylinder, 603 is an internal groove, and 604 is an outer housing body.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
As shown in fig. 1-12, the present invention provides an anti-seize coring device suitable for breaking up strata, comprising a core barrel 1, an inner housing 2, a guide rail 3, an outer housing 4, and an inner tube 5.
The core barrel 1 comprises an upper part, a middle part and a lower part.
The middle part of the core barrel 1 is a core barrel main body 103, the upper end and the lower end of the core barrel main body 103 are kept in an opening state, and the outer side surface of the core barrel main body 103 is a conical cylinder with the taper of 1:10. The side wall of the core barrel body 103 is provided with a V-shaped open groove 107, and the open groove 107 is communicated with the end surfaces of the upper end and the lower end of the core barrel body 103, so that the core barrel 1 is elastically deformed to enable a core to enter.
The lower portion of the core barrel 1 includes a latch 101 and a bottom mating boss 102. The bottom matching boss 102 is a horizontally arranged annular structure, and is fixedly arranged on the outer side surface of the core barrel body 103 near the lower edge, and the bottom matching boss 102 is cut off at the open slot 107. The latch teeth 101 are uniformly arranged on the lower end surface of the bottom matching boss 102 and fixedly connected with the bottom matching boss 102, and the latch teeth 101 are contacted with the outer side surface of the core barrel main body 103, so that the integral rigidity of the core barrel 1 is enhanced, the protection and support effects are realized when the core barrel 1 is elastically deformed, and the effect is equivalent to the effect of reinforcing ribs; the latch teeth 101 are independent of each other, the lower ends of the latch teeth 101 are pointed, the lower ends of the latch teeth 101 extend beyond the lower end face of the core barrel 1, and the latch teeth 101 play a role in separating rock cores and fragments and clamping the rock cores.
The upper portion of the core barrel 1 includes a connecting seat 104, a top mating boss 105. The connecting seat 104 is of a horizontally arranged annular structure, and is fixedly arranged at the upper end face of the core barrel body 103, and the inner diameter and the outer diameter of the connecting seat 104 are respectively equal to the inner diameter and the outer diameter of the upper end face of the core barrel body 103; a semicircular unloading groove 106 is arranged at the position, opposite to the opening groove 107, of the lower end face of the connecting seat 104, and stress concentration during elastic deformation of the core barrel 1 is reduced through the unloading groove 106. The number of the top matching bosses 105 is three, the structures are kept the same, and the top matching bosses are respectively and fixedly arranged on the upper end face of the core barrel main body 103; the outer edge and the inner edge of the bottom surface of the top matching boss 105 are respectively overlapped with the outer edge and the inner edge of the upper end surface of the connecting seat 104, and the length of the top surface of the top matching boss 105 is smaller than that of the bottom surface.
A plurality of inner convex blocks 108 and welding layers 109 are fixedly arranged on the inner side surface of the core barrel body 103, the inner convex blocks 108 and the welding layers 109 are uniformly arranged along the circumference, the inner convex blocks 108 are arranged along the axis direction of the core barrel body 103 in an extending mode, one welding layer 109 is arranged between the upper half sections of every two adjacent inner convex blocks 108, and the outer side surface of each inner convex block 108 exceeds the outer side surface of the welding layer 109.
The inner housing 2 comprises an inner housing main body 201, a connecting circular ring, a core feeding pipe 202, an outer sliding block 203 and a matching groove 204.
The inner casing main body 201 is a cylindrical structure with openings at the upper end and the lower end, a square notch is arranged on the side wall of the inner casing main body 201, the upper end and the lower end of the square notch are respectively communicated with the end faces of the upper end and the lower end of the inner casing main body 201, and the square notch is arranged to facilitate the observation and the operation when the core barrel 1 is taken out; an inner annular boss is provided at the lower edge of the inner side surface of the inner housing main body 201, respectively. The core feeding pipe 202 has a cylindrical structure with openings at the upper and lower ends, and the outer diameter of the core feeding pipe 202 is smaller than the inner diameter of the inner housing main body 201. The connecting ring is of a ring-shaped structure which is horizontally arranged, the inner diameter of the connecting ring is equal to the inner diameter of the core feeding pipe 202, and the outer diameter of the connecting ring is equal to the outer diameter of the inner shell body 201. The upper end face of the connecting ring is fixedly connected with the lower end face of the core feeding pipe 202, and the lower end face of the connecting ring is fixedly connected with the upper end face of the inner shell body 201. Three fitting grooves 204 are provided on the lower end face of the connection ring. Three sets of outside sliders 203 are uniformly provided on the outer side surface of the inner housing main body 201, and each set of outside sliders 203 includes upper and lower outside sliders 203, respectively.
The inner diameter of the inner housing body 201 is larger than the outer diameter of the core barrel body 103, and when the core barrel 1 is connected with the inner housing 2, the core barrel body 103 is sleeved inside the inner housing body 201. The top cooperation boss 105 of core section of thick bamboo 1 upper end is pegged graft in the inside cooperation groove 204 of inside casing 2 respectively one-to-one, and top cooperation boss 105 is interference fit with cooperation groove 204 to make the casing 2 and core section of thick bamboo 1 looks fixed connection. The inner annular boss at the lower edge of the inner side surface of the inner housing main body 201 contacts with the outer side surface of the core barrel main body 103, and the lower end surface of the inner annular boss contacts with the upper end surface of the bottom matching boss 102, so that the inner annular boss and the bottom matching boss 102 are matched, the axial positions of the core barrel 1 and the inner housing 2 can be limited, and chips can be prevented from entering between the inner housing 2 and the core barrel 1 to clamp the core barrel 1, so that the core barrel 1 is deformed and failed. The open groove 107 of the core barrel body 103 corresponds to a square notch of the inner housing body 201, which exposes the open groove 107 and the relief groove 106 of the core barrel 1. The space between the inner wall of the inner housing body 201 and the outer wall of the core barrel body 103 is filled with a highly elastic material.
The outer case 4 includes an outer case main body 604 and a feed cylinder 602.
The core barrel 602 has a cylindrical structure with upper and lower ends open, and an internal thread 601 is provided on an inner surface of the core barrel 602. The outer casing body 604 has a semi-cylindrical structure with openings at the upper and lower ends, and the outer diameter of the outer casing body 604 is equal to the outer diameter of the core barrel 602. A semicircular inner groove 603 is provided on the inner side surface of the outer housing main body 604, and the inner groove 603 communicates with the radial end surface of the inner housing main body 201.
The inner tube 5 is of a cylindrical structure with an opening at the upper section and an opening at the lower section, and external threads are arranged at the lower edge of the outer side surface of the inner tube 5. The lower end of the inner tube 5 is inserted into the core feeding barrel 602 of the outer shell 4, and the external thread on the outer side surface of the inner tube 5 is in threaded connection with the internal thread 601 in the core feeding barrel 602.
Three groups of moving devices are arranged in the coring device, each group of moving devices respectively comprises a guide rail 3 and two outer side sliding blocks 203, wherein the two outer side sliding blocks 203 are respectively and fixedly arranged on the outer side face of the inner shell body 201 in an up-down distribution manner, and the guide rail 3 is arranged in an inner groove 603 on the inner side face of the outer shell body 604.
The outer side surface of the inner shell body 201 is provided with a slide groove 401 at a position corresponding to each outer slide 203, a welding block 402 is fixedly arranged at the inner bottom surface of the slide groove 401, and the outer slide 203 is welded on the welding block 402. The upper outer slide block 203 and the lower outer slide block 203 have the same structure and are composed of an upper layer and a lower layer, wherein the upper slide block layer 404 is a rectangular mechanism, the lower slide block layer 403 is of an isosceles trapezoid structure, the lower slide block layer 403 is welded on the welding block 402, the lower end of the inner side surface of the upper slide block layer 404 is welded on the outer side of the lower slide block layer 403, and the upper slide block layer 404 is higher than the lower slide block layer 403 in height. The slider upper layer 404 and the slider lower layer 403 are located outside the slider groove 401.
The guide rail 3 is a square block structure which is vertically arranged, and the upper end surface and the lower end surface of the guide rail 3 are respectively contacted with the top surface and the bottom surface of the inner groove 603 in the outer shell body 604. The guide rail 3 is provided with an inner rectangular groove 501 on an end face toward the side of the inner housing 2, the inner rectangular groove 501 being provided to extend in the vertical direction. The outside of inboard rectangle recess 501 is provided with outside inclined plane recess 502, and the width of outside inclined plane recess 502 is greater than the width of inboard rectangle recess 501, is provided with six sets of zigzag boss from top to bottom symmetry respectively on the both sides lateral wall of outside inclined plane recess 502, and two zigzag boss of inside of every group set up on the both sides lateral wall of outside inclined plane recess 502 symmetry respectively, and the clearance between two zigzag boss increases in proper order from bottom to top. Of the six sets of saw-tooth lands, the upper three sets are upper lead portions 504, the lower three sets are lower lead portions 505, the upper lead portions 504 are the leads of the upper outer slider 203, and the lower lead portions 505 are the leads of the lower outer slider 203. Of the three groups of zigzag bosses of the upper lead portion 504, the minimum width of the uppermost group of zigzag bosses is equal to the width of the inner rectangular groove 501, the minimum width of the middle group of zigzag bosses is larger than the width of the inner rectangular groove 501 and smaller than the minimum width of the lowermost group of zigzag bosses, and the connection parts of two adjacent groups of zigzag bosses are transited through an arc; of the three sets of zigzag bosses of the lower lead portion 505, the uppermost set of zigzag bosses has the smallest width equal to the width of the inner rectangular groove 501, and the middle set of zigzag bosses has the smallest width larger than the width of the inner rectangular groove 501 and smaller than the smallest width of the lowermost set of zigzag bosses, and the joints of the adjacent two sets of zigzag bosses are transited through an arc. A chip guard 503 is provided at the bottom end openings of the inside rectangular groove 501 and the outside bevel groove 502.
When the outer shell 4 is installed with the inner shell 2, the upper end of the core feeding pipe 202 of the inner shell 2 extends into the core feeding pipe 602 of the outer shell 4, so that the core feeding pipe 202 of the inner shell 2 can axially move in the core feeding pipe 602 of the shell. Three sets of outside sliders 203 on the outside of the inner housing main body 201 extend into the three guide rails 3, respectively, with one outside slider 203 on the upper side being located at the upper lead portion 504 and one outside slider 203 on the lower side being located at the lower lead portion 505. Specifically, the upper slider layer 404 is located inside the inner rectangular groove 501 of the guide rail 3, and the lower slider layer 403 is located inside the lowermost set of saw-tooth shaped bosses. The three guide rails 3 are all located inside the inner groove 603 of the outer housing 4. The square notch of the inner housing body 201 is located in the open middle of the outer housing body 604. At this time, the outer housing main body 604 has a lower-most height than the inner housing main body 201 and a higher-most height than the core barrel main body 103.
The working principle of the invention is as follows:
when the core is normally taken, the outer slide block 203 in the core taking device stretches into the groove in the guide rail 3, and as the lower slide block layer 403 is positioned in the group of saw-tooth bosses at the lowest of the outer inclined surface grooves 502, the trapezoidal inclined surfaces at two sides of the lower slide block layer 403 are respectively contacted with the inclined surfaces of the saw-tooth bosses at two sides to receive a resistance, so that the inner shell 2 is prevented from rising in the outer shell 4.
When the core is clamped, the axial pressure applied to the coring device is larger than a set value, at the moment, the trapezoid inclined planes at the two sides of the lower layer 403 of the sliding block are respectively contacted with the inclined planes of the zigzag bosses at the two sides to generate elastic deformation, and under the pushing action of the core, the main body 103 of the coring barrel expands outwards to increase the bottom space and relieve the accumulation of chips at the bottom of the coring barrel 1; on the other hand, during the lifting process of the coring device, due to the sudden change of the width between the two zigzag bosses of the guide rail 3, the lower layer 403 of the sliding block can resume elastic deformation, so that the coring barrel 1 oscillates at a specific position, and the chips can drop due to inertia to relieve the accumulation of the chips in the coring barrel 1. And because the core barrel 1 is arranged in the inner shell 2, elastic materials are filled between the inner shell 2 and the core barrel 1, and the core barrel 1 deformation failure caused by accumulation of chips on the side wall of the core barrel 1 can be avoided.
When the core barrel 1 is used for coring, the core barrel 1 elastically deforms in the inner shell 2 to enable a rock core to enter, the rock core and the inner lug 108 of the core barrel 1 are contacted with the welding layer 109 to be firmly gripped, and then the rock core sequentially enters the core feeding pipe 202 of the inner shell 2 and the core feeding pipe 602 of the outer shell 4, and finally enters the inner tube 5 to be cored smoothly.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. Anti-sticking coring device suitable for broken stratum, its characterized in that: the novel core taking device comprises a core taking barrel (1), an inner shell (2) and an outer shell (4), wherein the core taking barrel (1) comprises a core taking barrel main body (103), an open slot (107) is formed in the side wall of the core taking barrel main body (103), a circle of clamping teeth (101) are arranged at the lower end of the outer side face of the core taking barrel main body (103), a connecting seat (104) is fixedly arranged at the upper end of the core taking barrel main body (103), and a top matching boss (105) is arranged at the upper end of the connecting seat (104); the core taking device comprises an inner shell (2), a core taking device body and a core taking device body, wherein the inner shell (2) comprises an inner shell body (201), a cylindrical core feeding pipe (202) is arranged at the upper end of the inner shell body (201), a matching groove (204) is formed in the inner top surface of the inner shell (2), the core taking pipe body (103) is located inside the inner shell body (201), and a top matching boss (105) is inserted into the matching groove (204); a plurality of groups of outer sliding blocks (203) are arranged outside the inner shell body (201), each group of outer sliding blocks (203) is inserted into one guide rail (3) respectively, a plurality of groups of saw-tooth-shaped bosses are arranged inside an outer inclined surface groove (502) on the end surface of the guide rail (3), and inclined surfaces on two sides of each outer sliding block (203) are contacted with inclined surfaces of the lowest group of saw-tooth-shaped bosses; the inner shell body (201) is located inside the outer shell body (4), an inner groove (603) is formed in the inner side face of the outer shell body (4), and the guide rails (3) are located inside the inner groove (603).
2. An anti-seize coring device as set forth in claim 1, adapted to fracture a formation, wherein: the upper end and the lower end of the core barrel main body (103) are kept in an opening state, and the outer side surface of the core barrel main body (103) is a conical cylinder with the taper of 1:10; a V-shaped open groove (107) is arranged on the side wall of the core barrel body (103), and the open groove (107) is communicated with the end faces of the upper end and the lower end of the core barrel body (103).
3. An anti-seize coring device as set forth in claim 1, adapted to fracture a formation, wherein: the outer side surface of the core barrel body (103) is close to the lower edge, the bottom matching boss (102) is fixedly arranged and is of a circular ring-shaped structure which is horizontally arranged, the clamping teeth (101) are uniformly arranged on the lower end surface of the bottom matching boss (102) and are fixedly connected with the bottom matching boss (102), the clamping teeth (101) are contacted with the outer side surface of the core barrel body (103), the clamping teeth (101) are independent from each other, and the lower ends of the clamping teeth (101) exceed the lower end surface of the core barrel (1).
4. An anti-seize coring device as set forth in claim 1, adapted to fracture a formation, wherein: a plurality of internal lugs (108) and welding layers (109) are fixedly arranged on the inner side surface of the core barrel body (103), the internal lugs (108) and the welding layers (109) are uniformly arranged along the circumference, the internal lugs (108) are arranged in an extending mode along the axial direction of the core barrel body (103), and one welding layer (109) is arranged between the upper half sections of every two adjacent internal lugs (108).
5. An anti-seize coring device as set forth in claim 3, adapted to fracture a formation, wherein: the inner shell body (201) is of a cylindrical structure with openings at the upper end and the lower end, a square notch is formed in the side wall of the inner shell body (201), inner annular bosses are respectively arranged at the lower edges of the inner side surfaces of the inner shell body (201), the inner annular bosses at the lower edges of the inner side surfaces of the inner shell body (201) are in contact with the outer side surfaces of the core barrel body (103), and the lower end surfaces of the inner annular bosses are in contact with the upper end surfaces of the bottom matching bosses (102); the open slot (107) of the core barrel main body (103) corresponds to the square notch of the inner shell main body (201); a space between the inner wall of the inner housing body (201) and the outer wall of the core barrel body (103) is filled with a highly elastic material.
6. An anti-seize coring device as set forth in claim 1, adapted to fracture a formation, wherein: the shell body (4) comprises an shell body (604) and a core feeding cylinder (602), the core feeding cylinder (602) is of a cylindrical structure with an opening at the upper end and the lower end, an inner thread (601) is arranged on the upper portion of the inner side face of the core feeding cylinder (602), the shell body (604) is of a semi-cylindrical structure with an opening at the upper end and the lower end, a semi-circular inner groove (603) is arranged on the inner side face of the shell body (604), and the inner groove (603) is communicated with the radial end face of the inner shell body (201).
7. An anti-seize coring device as set forth in claim 6, adapted to fracture a formation, wherein: the inner pipe (5) is of a cylindrical structure with an opening at the upper section and an opening at the lower section, and the external thread at the lower end of the outer side surface of the inner pipe (5) is in threaded connection with the internal thread (601) in the core feeding cylinder (602).
8. An anti-seize coring device as set forth in claim 1, adapted to fracture a formation, wherein: each group of outer sliding blocks (203) comprises two outer sliding blocks (203) which are distributed up and down, the two outer sliding blocks (203) are respectively and fixedly arranged on the outer side face of the inner shell body (201), a sliding block groove (401) is formed in the outer side face of the inner shell body (201) at the corresponding position of each outer sliding block (203), a welding block (402) is fixedly arranged at the inner bottom face of each sliding block groove (401), and the outer sliding blocks (203) are welded on the welding blocks (402); the upper outer slide block (203) and the lower outer slide block (203) are identical in structure and are composed of an upper layer and a lower layer, wherein the upper slide block layer (404) is a rectangular mechanism, the lower slide block layer (403) is of an isosceles trapezoid structure, the lower slide block layer (403) is welded on the welding block (402), the lower end of the inner side surface of the upper slide block layer (404) is welded on the outer side of the lower slide block layer (403), and the upper slide block layer (404) is higher than the lower slide block layer (403).
9. An anti-seize coring device adapted for breaking up a subterranean formation as set forth in claim 8, wherein: the guide rail (3) is provided with an inner rectangular groove (501) extending vertically on the end face of one side of the inner shell (2), an outer inclined surface groove (502) is arranged on the outer side of the inner rectangular groove (501), the width of the outer inclined surface groove (502) is larger than that of the inner rectangular groove (501), six groups of saw-tooth bosses are symmetrically arranged on the side walls of two sides of the outer inclined surface groove (502) from top to bottom respectively, and the gap between two saw-tooth bosses in each group is sequentially increased from bottom to top; of the six groups of zigzag bosses, the upper three groups are upper lead portions (504), the lower three groups are lower lead portions (505), the upper lead portions (504) are leads of the upper outer slider (203), and the lower lead portions (505) are leads of the lower outer slider (203).
10. An anti-seize coring device as set forth in claim 9, adapted to fracture a formation, wherein: of the three groups of zigzag bosses of the upper lead part (504) or the lower lead part (505), the minimum width of the uppermost group of zigzag bosses is equal to the width of the inner rectangular groove (501), the minimum width of the middle group of zigzag bosses is larger than the width of the inner rectangular groove (501) and smaller than the minimum width of the lowermost group of zigzag bosses, and the connection parts of two adjacent groups of zigzag bosses are transited through an arc; when the outer slide blocks (203) extend into the guide rail (3), one outer slide block (203) on the upper side is located on the upper lead portion (504), one outer slide block (203) on the lower side is located on the lower lead portion (505), the upper slide block layer (404) is located in the inner rectangular groove (501) of the guide rail (3), and the lower slide block layer (403) is located in the lowermost set of zigzag bosses.
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| CN202310658908.0A CN116378594B (en) | 2023-06-06 | 2023-06-06 | Anti-blocking coring device suitable for broken stratum |
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| CN202310658908.0A CN116378594B (en) | 2023-06-06 | 2023-06-06 | Anti-blocking coring device suitable for broken stratum |
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