CN214532823U - Sand gravel stratum drilling device - Google Patents
Sand gravel stratum drilling device Download PDFInfo
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- CN214532823U CN214532823U CN202120355437.2U CN202120355437U CN214532823U CN 214532823 U CN214532823 U CN 214532823U CN 202120355437 U CN202120355437 U CN 202120355437U CN 214532823 U CN214532823 U CN 214532823U
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Abstract
The utility model relates to a sand gravel stratum creeps into device belongs to geological drilling technical field. The technical scheme is as follows: a second casing (22) is arranged in the first casing (20), and cement slurry (21) is arranged between the first casing (20), the second casing (22) and the sand gravel stratum (23); the drilling tool (7) and the drill rod (17) are both arranged in the second casing (22), and the top end of the drilling tool (7) is connected with the drill rod (17). The utility model has the advantages that: the drill rod has high processing precision, dynamic balance is kept during drilling, the inner surface and the outer surface of the drill rod are smooth, rock debris can pass through the drill rod easily, and the flow resistance of the rock debris is reduced; a larger outer annular gap is formed between the hole wall and the outer pipe of the drilling tool, so that rock powder is rapidly discharged to the ground surface, and rock debris is prevented from precipitating in the hole to cause drilling paste and drilling burning accidents; the drilling efficiency in the conglomerate stratum is improved, the core sampling rate is high, accidents are reduced, and safe drilling is realized.
Description
Technical Field
The utility model relates to a sand gravel stratum creeps into device belongs to geological drilling technical field.
Background
Conventional wireline coring methods in sand and gravel formations encounter a number of construction difficulties. Firstly, most of sand gravel stratum is loose, the cementation is poor, the soft and hard interbedded layers are frequent, the sizes of gravel diameters are different, accidents such as diameter exceeding, collapse, drill sticking and the like are easy to occur in drilling construction, and hole accidents such as drill burying, drill sticking, drill clamping, drill rod breaking and the like are caused in drilling. At present, the conventional rope coring drilling process is mostly adopted in sand gravel stratum in China, the outer annular water-passing gap is small, chip removal is not smooth, and rock debris sinks to the bottom of a hole to cause secondary crushing; the drill bit has small outer edge, the chip removal is not rapid, the drill sticking is easy to happen, and the continuous drilling is influenced; in the drilling process, the inner wall of the drill rod is often caked, the inner pipe is salvaged and blocked, the rock core taking rate is low, the service life of a drill bit is short, rock debris is easily deposited in the recovery pipe of the elastic clamp assembly, the elastic clamp is prevented from shrinking, and the problems that the salvage and recovery of the rock core pipe are failed and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sand gravel stratum creeps into device has improved and has crept into efficiency in the sand gravel stratum, and the rock core sampling rate is high, reduces the occurence of failure, creeps into safely, has solved the problem that exists among the background art.
The technical scheme of the utility model is that:
a sand gravel stratum drilling device comprises a first casing pipe, a second casing pipe, a drill rod and a drilling tool, wherein the second casing pipe is arranged in the first casing pipe, and cement slurry is arranged between the first casing pipe and the sand gravel stratum and between the second casing pipe and the sand gravel stratum; the drilling tool and the drill rod are both arranged in the second casing, and the top end of the drilling tool is connected with the drill rod; the drilling tool comprises a recovery pipe of the elastic clamping assembly, an elastic clamping plate, an elastic clamping seat, an adapter, a suspension joint, a suspension ring, an outer pipe, an inner pipe and a centralizer, wherein the outer pipe and the inner pipe are of tubular structures, and the recovery pipe of the elastic clamping assembly, the elastic clamping plate, the elastic clamping seat, the adapter, the suspension joint and the inner pipe are sequentially arranged in the outer pipe; a plurality of water channels are uniformly arranged on the recovery pipe of the elastic clamp assembly along the circumferential direction; a plurality of elastic clamping plates are arranged on the elastic clamping seat, the lower end of the elastic clamping seat is connected with a suspension joint through an adapter, and a suspension ring is arranged between the suspension joint and the outer pipe; the suspension ring is annular, and a plurality of water passing grooves are uniformly formed in the circumferential direction; the outer pipe is provided with a centralizer, the centralizer is axially provided with a plurality of reserved grooves, and wear-resistant blocks are arranged in the reserved grooves; the top end of the outer pipe is connected with the drill rod, the bottom end of the outer pipe is provided with a drill bit, and the outer diameter of the drill bit is matched with the outer diameter of the centralizer.
The cross section of the centralizer is of an annular structure, the inner ring is circular, the outer ring is square, hexagonal or octagonal, and each corner is provided with a reserved groove; the outer loop is square, effectively maintains the stable gyration of drilling tool to increase water passing area, be favorable to the flush fluid circulation, discharge the detritus fast.
The number of the centralizers is two, the centralizers are an upper centralizer and a lower centralizer respectively, the upper centralizer is arranged between the top end of the drilling tool and the lower drill rod, and the lower centralizer is arranged between the bottom end of the drilling tool and the drill bit.
The drill rod consists of an upper drill rod and a lower drill rod, the outer diameters of the upper drill rod and the lower drill rod are the same, the inner diameter of the upper drill rod is smaller than that of the lower drill rod, and the upper drill rod is in threaded connection with the lower drill rod; the upper drill rod adopts an enhanced drill rod column, the lower drill rod adopts a light drill rod column, the hoisting weight of the drilling machine is effectively reduced, and the drill rod column is effectively prevented from being broken during drilling. The drill rod is provided with the negative-angle threads, the thread structure is asymmetrical, the thread surface is hardened, the torsion resistance and the tensile strength of the drill rod are enhanced, the accidents of drill sticking and breakage of the drill rod are effectively prevented, the efficient and safe drilling of the drill hole is ensured, and the pure drilling time of the drilling is prolonged. The surface of the drill rod is coated with the ammonium salt efficient lubricating grease, a firm film can be formed on the surface of the drill rod, the torque of the drill rod is reduced, and meanwhile, the lubricating grease has the function of lubricating diamonds, so that the friction force between the drill rod and the hole wall is greatly reduced, the power of the ground surface is saved, and the drill rod breakage accident is effectively prevented.
The plurality of bullet cardboard is umbelliform and sets up on bullet cassette, and bullet cardboard quantity is 3-6, and a plurality of bullet cardboard makes bullet card assembly evenly atress in the bullet card indoor, effectively increases the stability of bullet card assembly when gyration.
2-8 water tanks are arranged on the recovery pipe of the elastic clip assembly, so that rock debris is promoted to be taken away by flushing fluid at any time, sediment and the like are effectively prevented from precipitating at the recovery pipe of the elastic clip assembly, and the recovery pipe of the elastic clip assembly is more flexible and convenient to move.
The suspension ring is provided with 4-10 water through grooves, a scraping platform is formed between adjacent water through grooves, the suspension ring with the water through grooves increases the annular space of the elastic clamping assembly between drill pipe columns, the resistance of lifting and lowering the inner pipe assembly is reduced, and meanwhile, the scraping platform of the suspension ring can scrape the mud skin of the drill pipe columns when the suspension ring is lifted and lowered, so that the success rate of fishing the rope coring drilling tool is ensured, the non-pure drilling time is reduced, and the drilling time utilization rate is improved.
The drill bit is equipped with super big outer water trough and compound piece reinforcing drill bit external diameter, and super big outer water trough has unobstructed detritus of arranging and thick sand grain when creeping into, prevents effectively that the broken detritus of secondary from influencing and creeps into efficiency. The composite sheet reinforced drill bit effectively prevents the drill bit from reducing the diameter and reducing the water passing area of the outer water passing groove, forming rock powder precipitation, influencing the drilling efficiency and even causing the sticking drilling accident.
The utility model discloses evenly set up a plurality of basins along the circumferencial direction on bullet card assembly recovery tube, evenly set up a plurality of water service grooves along the circumferencial direction hanging the ring, can increase the clearance between the outer tube of pore wall and drilling tool, form great outer annular clearance between the outer tube of pore wall and drilling tool. Especially for the sand gravel stratum, the large outer annular gap of the utility model can create good water passing conditions.
The drilling tool can be replaced with drill bits of different diameters according to the conditions of the sand gravel stratum.
In the using process, firstly, a drill bit with a larger outer diameter is used for drilling for 5m in a sand gravel stratum, and then a first sleeve is put in; fixing the first casing with cement slurry between the first casing and the sand gravel stratum; replacing a drill bit with a smaller outer diameter, drilling 150m into the first casing, putting a second casing, fixing the second casing between the second casing and the sand gravel stratum by using cement slurry, and forming a fixed well by using the first casing and the second casing; the drill rod is formed by combining an upper drill rod and a lower drill rod, and the upper drill rod and the lower drill rod are connected through threads; coating ammonium salt type lubricating grease on the surfaces of the upper drill rod and the lower drill rod; an upper centralizer is arranged between the top end of the drilling tool and the lower drill rod, and a lower centralizer is arranged between the bottom end of the drilling tool and the drill bit; and (5) placing a drill rod and a drilling tool in the second casing, and drilling to a final hole.
The utility model has the advantages that: the drill rod has high processing precision, dynamic balance is kept during drilling, the inner surface and the outer surface of the drill rod are smooth, rock debris can pass through the drill rod easily, and the flow resistance of the rock debris is reduced; a larger outer annular gap is formed between the hole wall and the outer pipe of the drilling tool, so that rock powder is rapidly discharged to the ground surface, and rock debris is prevented from precipitating in the hole to cause drilling paste and drilling burning accidents; the plurality of water tanks of the recovery pipe of the elastic clamping assembly effectively prevent sediment from precipitating; the periphery of the suspension ring is provided with a water trough, so that the passing area of flushing liquid is increased, and the lifting resistance is reduced; the cross section outer ring of the centralizer is square, and the drilling fluid flows smoothly. The utility model provides high creep into efficiency in the gravel stratum, the rock core sampling rate is high, reduces the occurence of failure, creeps into safely.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a first sleeve and a second sleeve of the present invention;
fig. 3 is a partial cross-sectional view of the present invention;
FIG. 4 is a cross-sectional view of the drill rod of the present invention;
FIG. 5 is a schematic view of the structure of the drilling tool of the present invention;
FIG. 6 is a schematic view of the recovery pipe structure of the snapping assembly of the present invention;
fig. 7 is a schematic view of a suspension ring structure of the present invention;
FIG. 8 is a schematic structural view of the hexagonal centralizer of the present invention;
FIG. 9 is a schematic structural view of the octagonal centralizer of the present invention;
FIG. 10 is a schematic view of the square centralizer of the present invention;
fig. 11 is a schematic view of the structure of the wear-resistant block of the present invention;
in the figure: the device comprises an outer annular gap 1, an elastic clamping assembly recovery pipe 2, an elastic clamping plate 3, a suspension ring 4, an outer pipe 5, a drill bit 6, a drilling tool 7, an inner pipe 8, a wear-resistant block 9, a reserved groove 11, an elastic clamping seat 12, an adapter 13, a suspension joint 14, a water tank 15, a water through groove 16, a drill rod 17, an upper drill rod 171, a lower drill rod 172, an upper centralizer 18, a lower centralizer 19, a first casing pipe 20, cement slurry 21, a second casing pipe 22 and a gravel stratum 23.
Detailed Description
The present invention will be further described with reference to the accompanying drawings by way of examples.
A sand gravel stratum drilling device comprises a first casing pipe 20, a second casing pipe 22, a drill rod 17 and a drilling tool 7, wherein the second casing pipe 22 is arranged in the first casing pipe 20, and cement slurry 21 is arranged between the first casing pipe 20, the second casing pipe 22 and a sand gravel stratum 23; the drilling tool 7 and the drill rod 17 are both arranged in the second casing 22, and the top end of the drilling tool 7 is connected with the drill rod 17; the drilling tool 7 comprises a recovery pipe 2 of the elastic clamping assembly, an elastic clamping plate 3, an elastic clamping seat 12, an adapter 13, a suspension joint 14, a suspension ring 4, an outer pipe 5, an inner pipe 8 and a centralizer, wherein the outer pipe 5 and the inner pipe 8 are both of tubular structures, and the recovery pipe 2 of the elastic clamping assembly, the elastic clamping plate 3, the elastic clamping seat 12, the adapter 13, the suspension joint 14 and the inner pipe 8 are sequentially arranged in the outer pipe 5; a plurality of water grooves 15 are uniformly arranged on the recovery pipe 2 of the elastic clip assembly along the circumferential direction; the spring clamping seats are provided with a plurality of spring clamping plates 3, the lower ends of the spring clamping seats are connected with a suspension joint through an adapter, and a suspension ring 4 is arranged between the suspension joint and the outer pipe 5; the suspension ring 4 is annular, and a plurality of water passing grooves 16 are uniformly arranged along the circumferential direction; the outer pipe is provided with a centralizer, the centralizer is axially provided with a plurality of reserved grooves 11, and the reserved grooves 11 are internally provided with wear-resistant blocks 9; the top end of the outer pipe is connected with a drill rod 17, the bottom end of the outer pipe is provided with a drill bit 6, and the outer diameter of the drill bit is matched with the outer diameter of the centralizer.
The cross section of the centralizer is of an annular structure, the inner ring is circular, the outer ring is square, hexagonal or octagonal, and each corner is provided with a reserved groove; the outer loop is square, effectively maintains the stable gyration of drilling tool to increase water passing area, be favorable to the flush fluid circulation, discharge the detritus fast.
The number of the centralizers is two, namely an upper centralizer and a lower centralizer, an upper centralizer 18 is arranged between the top end of the drilling tool 7 and the lower drill rod 172, and a lower centralizer 19 is arranged between the bottom end of the drilling tool 7 and the drill bit 6.
The drill pipe 17 consists of an upper drill pipe 171 and a lower drill pipe 172, the outer diameters of the upper drill pipe 171 and the lower drill pipe 172 are the same, the inner diameter of the upper drill pipe 171 is smaller than that of the lower drill pipe 172, and the upper drill pipe 171 is in threaded connection with the lower drill pipe 172; the upper drill rod 171 adopts a reinforced CS113 drill rod, and the lower drill rod 172 adopts a light CS113 drill rod, so that the lifting weight of the drilling machine is effectively reduced, and the drill rod string is effectively prevented from being broken during drilling. The drill rod is provided with the negative-angle threads, the thread structure is asymmetrical, the thread surface is hardened, the torsion resistance and the tensile strength of the drill rod are enhanced, the accidents of drill sticking and breakage of the drill rod are effectively prevented, the efficient and safe drilling of the drill hole is ensured, and the pure drilling time of the drilling is prolonged. The surface of the drill rod 17 is coated with the ammonium salt efficient lubricating grease, a firm film can be formed on the surface of the drill rod, the torque of the drill rod is reduced, and meanwhile, the lubricating grease has the function of lubricating diamonds, so that the friction force between the drill rod and the hole wall is greatly reduced, the power of the ground surface is saved, and the breakage accident of the drill rod is effectively prevented.
The plurality of bullet cardboard is umbelliform and sets up on bullet cassette, and bullet cardboard quantity is 3-6, and a plurality of bullet cardboard makes bullet card assembly evenly atress in the bullet card indoor, effectively increases the stability of bullet card assembly when gyration.
2-8 water tanks are arranged on the recovery pipe of the elastic clip assembly, so that rock debris is promoted to be taken away by flushing fluid at any time, sediment and the like are effectively prevented from precipitating at the recovery pipe of the elastic clip assembly, and the recovery pipe of the elastic clip assembly is more flexible and convenient to move.
The suspension ring is provided with 4-10 water through grooves, a scraping platform is formed between adjacent water through grooves, the suspension ring with the water through grooves increases the annular space of the elastic clamping assembly between drill pipe columns, the resistance of lifting and lowering the inner pipe assembly is reduced, and meanwhile, the scraping platform of the suspension ring can scrape the mud skin of the drill pipe columns when the suspension ring is lifted and lowered, so that the success rate of fishing the rope coring drilling tool is ensured, the non-pure drilling time is reduced, and the drilling time utilization rate is improved.
The outer annular gap 1 of the utility model is 3.1-10 mm. The number of the water tanks of the recovery pipe of the elastic clamping assembly is designed according to the chip removal amount of sand gravel, more water tanks can be opened when the chip removal amount is large, less water tanks can be opened when the chip removal amount is small, and the number of the common water tanks is 2-8. The number of the elastic clamping plates is determined according to the bit pressure value required by drilling in the gravel stratum, and the larger the bit pressure value is, the more the number of the required elastic clamping plates is, generally 3-6. The number of the water grooves around the suspension ring is designed according to the chip removal amount of the gravel sand stratum, the design number of the water grooves around the suspension ring is large when the chip removal amount is large, and the design number of the water grooves around the suspension ring is small when the chip removal amount is large, and is generally 4-10 when the chip removal amount is small. The centralizer 7 is designed according to the outer diameter of the drill bit 6. The section outer ring of the centralizer is square, and can be square, hexagonal or octagonal.
In the embodiment, firstly, an alloy drill bit with the diameter of 152mm is used for drilling a sand gravel stratum for 5m, and then a first casing with the diameter of 146mm is put in; securing the first casing 20 with cement slurry 21 between the first casing and the sand and gravel formation 23; replacing a drill bit with the diameter of 133mm, drilling 150m in the first casing pipe 20, lowering a second casing pipe with the diameter of 127mm, fixing the second casing pipe with cement slurry 21 between the second casing pipe and the sand gravel stratum 23, and forming a fixed well by the first casing pipe 20 and the second casing pipe 22; the drill pipe 17 is formed by combining an upper drill pipe 171 and a lower drill pipe 172, and the upper drill pipe 171 and the lower drill pipe 172 are connected through threads; coating ammonium salt type lubricating grease on the surfaces of an upper drill rod and a lower drill rod, wherein the upper drill rod is a thickened high-strength wire line coring drill rod with the diameter of 101mm, and the lower drill rod is a light high-strength wire line coring drill rod with the diameter of 101 mm; an upper centralizer 18 is arranged between the top end of the drilling tool 7 and the lower drill rod 172, and a lower centralizer 19 is arranged between the bottom end of the drilling tool 7 and the drill bit 6; and placing a high-strength wire line coring drill rod with the diameter of 101mm and a rapid chip removal wire line coring drill tool with the diameter of 101mm and provided with an over-diameter reinforced composite sheet drill bit with the diameter of 113mm into a second casing pipe with the diameter of 127mm, and drilling to a final hole.
When the utility model is used, two-stage sleeves, namely a sleeve I and a sleeve II, are designed and installed according to the hole depth and the sand gravel stratum condition; according to the drilling sequence, a rapid chip removal gravel stratum wire line core drill tool and a reinforced thread type wire line core drill rod which are provided with an ultra-diameter reinforced gravel stratum composite sheet core drill bit are placed into the hole; coating lubricating grease on the outer surface of the rope coring drill rod; in order to adapt to the oversized outer annular space among the drill bit, the drilling tool and the drill rod and the hole wall, the flushing liquid amount during drilling needs to be correspondingly increased, and the upward return speed of the flushing liquid in the oversized outer annular space is ensured; in order to adapt to the drillability of the sand gravel stratum, the bit pressure is reduced compared with the conventional stratum during drilling; in order to adapt to the instability of the sand gravel stratum, the rotating speed of the drilling machine is in a range from low speed to medium speed during drilling; in the drilling process, rock debris in the flushing fluid is continuously removed, and a sand remover and a mud remover are adopted to reduce the sand content in the flushing fluid, reduce the influence of mud skin on the inner wall of the drill rod and ensure the success rate of the drilling tool in the fishing process; when drilling deep holes, in order to reduce the lifting load of a drilling machine and prevent the rope coring drill rod from being broken, a composite drill rod technology is adopted, namely, the lower part of a drilled hole is provided with the conventional high-strength rope coring drill rod with the same specification, and the upper part is provided with the rope coring drill rod with an internally thickened high-strength sand gravel layer.
Claims (4)
1. A sand and gravel stratum drilling device is characterized in that: the drilling tool comprises a first casing pipe (20), a second casing pipe (22), a drill rod (17) and a drilling tool (7), wherein the second casing pipe (22) is arranged in the first casing pipe (20), and cement slurry (21) is arranged between the first casing pipe (20), the second casing pipe (22) and a sand gravel stratum (23); the drilling tool (7) and the drill rod (17) are both arranged in the second casing (22), and the top end of the drilling tool (7) is connected with the drill rod (17); the drilling tool (7) comprises a recovery pipe (2) of the elastic clamping assembly, an elastic clamping plate (3), an elastic clamping seat (12), an adapter (13), a suspension joint (14), a suspension ring (4), an outer pipe (5), an inner pipe (8) and a centralizer, wherein the outer pipe (5) and the inner pipe (8) are both of tubular structures, and the recovery pipe (2) of the elastic clamping assembly, the elastic clamping plate (3), the elastic clamping seat (12), the adapter (13), the suspension joint (14) and the inner pipe (8) are sequentially arranged in the outer pipe (5); a plurality of water tanks (15) are uniformly arranged on the recovery pipe (2) of the elastic clip assembly along the circumferential direction; a plurality of elastic clamping plates (3) are arranged on the elastic clamping seat, the lower end of the elastic clamping seat is connected with a suspension joint through an adapter, and a suspension ring (4) is arranged between the suspension joint and the outer pipe (5); the suspension ring (4) is annular, and a plurality of water passing grooves (16) are uniformly arranged along the circumferential direction; the outer pipe is provided with a centralizer, the centralizer is axially provided with a plurality of reserved grooves (11), and wear-resistant blocks (9) are arranged in the reserved grooves (11); the top end of the outer pipe is connected with a drill rod (17), the bottom end of the outer pipe is provided with a drill bit (6), and the outer diameter of the drill bit is matched with the outer diameter of the centralizer.
2. A sand and gravel formation drilling apparatus as defined in claim 1, wherein: the cross section of the centralizer is of an annular structure, the inner ring is circular, the outer ring is square, hexagonal or octagonal, and each corner is provided with a reserved groove.
3. A sand and gravel formation drilling device according to claim 1 or 2, wherein: the number of the centralizers is two, the centralizers are an upper centralizer and a lower centralizer respectively, an upper centralizer (18) is arranged between the top end of the drilling tool (7) and the lower drill rod (172), and a lower centralizer (19) is arranged between the bottom end of the drilling tool (7) and the drill bit (6).
4. A sand and gravel formation drilling device according to claim 1 or 2, wherein: the drill rod (17) is composed of an upper drill rod (171) and a lower drill rod (172), the outer diameters of the upper drill rod (171) and the lower drill rod (172) are the same, the inner diameter of the upper drill rod (171) is smaller than that of the lower drill rod (172), and the upper drill rod (171) is in threaded connection with the lower drill rod (172).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120355437.2U CN214532823U (en) | 2021-02-09 | 2021-02-09 | Sand gravel stratum drilling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120355437.2U CN214532823U (en) | 2021-02-09 | 2021-02-09 | Sand gravel stratum drilling device |
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| CN214532823U true CN214532823U (en) | 2021-10-29 |
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| CN202120355437.2U Active CN214532823U (en) | 2021-02-09 | 2021-02-09 | Sand gravel stratum drilling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796678A (en) * | 2021-02-09 | 2021-05-14 | 金石钻探(唐山)股份有限公司 | Sand gravel stratum drilling device and drilling process |
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2021
- 2021-02-09 CN CN202120355437.2U patent/CN214532823U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796678A (en) * | 2021-02-09 | 2021-05-14 | 金石钻探(唐山)股份有限公司 | Sand gravel stratum drilling device and drilling process |
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