CN113294107A

CN113294107A - Spiral rope core drill and construction method thereof

Info

Publication number: CN113294107A
Application number: CN202110795412.9A
Authority: CN
Inventors: 邓赫宏; 刘绪勇; 邓光宏
Original assignee: Zhuhai Egr Special Drilling Equipment Co ltd
Current assignee: Zhuhai Egr Special Drilling Equipment Co ltd
Priority date: 2021-06-24
Filing date: 2021-07-14
Publication date: 2021-08-24

Abstract

The invention discloses a spiral rope core drill, which comprises a drill rod, an outer pipe assembly and an inner pipe assembly, wherein the inner pipe assembly is arranged in an inner cavity of the outer pipe assembly; one end of the outer pipe assembly is connected with a drill rod, the other end of the outer pipe assembly is connected with a drill bit with a hollow structure, and spiral sheets are arranged on the outer surfaces of the drill rod, the drill bit and the outer pipe assembly. The core taking construction method of the rope core drilling tool adopts a dry drilling mode without flushing fluid to drill, and after the core is drilled to a certain depth (the length of an inner pipe), the core is placed into a drill rod through a fishing device on a drilling machine and connected with a spearhead arranged on an inner pipe assembly, and a bullet tong is driven to break away from the bullet catch to take out the inner pipe assembly together with the collected core from the inner cavity of the outer pipe assembly, so that the core taking operation is completed. The invention provides a spiral rope core drill and a construction method thereof, wherein a spiral piece structure is used for chip removal and resistance reduction, rock chips and soil chips rise along with the spiral piece to be discharged out of an orifice when a drill bit continuously drills into a stratum, and an inner pipe assembly filled with a core is taken out through a fisher for rope core taking.

Description

Spiral rope core drill and construction method thereof

Technical Field

The invention relates to the technical field of drilling, in particular to a spiral rope core drill and a construction method thereof.

Background

The wire-line coring drilling process is a drilling method which is used for completing coring work by fishing a core pipe provided with a core from the bottom of a hole through a steel wire rope and a special fishing tool without extracting the core through a drill rod after completing the next coring drilling in the drilling process. Along with the improvement of engineering reconnaissance quality requirement, the human cost constantly promotes, and the process limitation of traditional equipment and the core is got to the lifting drill is more and more obvious, and the core is got owing to need not the lifting drill to get the core to the rope coring drilling technology, can realize high-efficient drilling under the circumstances of guaranteeing the core sampling rate, has improved drilling efficiency, reduces artifical intensity of labour. The engineering investigation and drilling is basically to drill the earth surface, and in a sand layer with a large sand content, granite residual soil, a sludge layer, a water-sensitive stratum and a soil layer which is easy to liquefy when meeting water, the requirements for the rinsing liquid are relatively high, and the rinsing liquid needs to be prepared by a professional technician in the aspect of rinsing liquid and is not always successful, because the flushing liquid of the conventional rope coring drilling tool is very important in the drilling construction, is mainly used for the functions of cooling a drill bit, removing rock dust, lubricating and reducing resistance, protecting a hole wall and the like, and the construction can not be carried out basically without the flushing liquid, the application of the rope coring process in engineering exploration and drilling is greatly limited due to the problem of the flushing liquid, in particular, the sample is partially demanding, such as environmental detection type exploration, which forbids the use of washing liquid, this has directly led to the inability of the wire line coring process to be used in such projects, where only the traditional labor intensive coring process has been used. Therefore, the problem that the traditional rope core drilling process needs flushing liquid at present is solved, and the development problem of the traditional rope core drilling process in the field of engineering investigation is restrained.

Disclosure of Invention

The invention aims to provide a spiral rope core-taking drilling tool, wherein a spiral piece structure is designed for chip removal and resistance reduction, in the drilling process, a drill bit continuously burns and drills towards the stratum, the spiral pieces of rock debris and soil debris ascend to a discharge hole, and when the core is taken, an inner pipe assembly filled with the core is taken out through a fisher for rope core taking, so that the core-taking drilling is realized under the condition of no flushing fluid. The invention provides a core taking construction method, which improves the adaptability of a rope coring process in the field of engineering exploration and drilling through a new method of combining flushing fluid-free dry drilling of a drilling tool with a spiral slice with the rope coring process.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a spiral rope core drill, includes drilling rod, outer tube assembly, and the one end at the outer tube assembly is connected to the drilling rod, the other end of outer tube assembly is connected with the hollow drill bit of structure, the drill bit is equipped with the flight with the outer tube assembly on the surface.

By adopting the technical scheme, the spiral sheet can be used for reducing resistance and removing chips, and soil chips and rock chips in the drilling process are discharged out of the orifice, so that flushing-fluid-free drilling is realized; the structure cavity of drill bit, the drill core among the drilling process constantly gets into the inner tube assembly, is convenient for get out the sampling through the rope is got the core fishing device and is whole.

Further, the spiral sheets are spirally distributed on the outer surfaces of the drill bit and the outer pipe assembly in a multi-line parallel mode. The spiral plate is spirally distributed in a multi-line parallel manner, so that the generated rock debris and soil debris can be conveniently and quickly lifted to the hole opening along the surface of the spiral plate in the drilling process.

Furthermore, the drilling end ring of the drill bit is provided with a plurality of drill sheets, and the drill sheets extend towards the axial center to form extension ends. The extending end rings of the drill bits are arranged on the surface of the drill bit to form a conical structure to assist in drilling and chip removal.

Further, the outer wall of the drill bit extends in an arc shape and forms an external thread in the annular direction. The external thread formed by the drill bit has a cutting effect on the hole wall in the drilling process of the drill bit.

Furthermore, a composite sheet is inlaid on the side edge of the drill bit. The composite sheet forms the edge part of the drill sheet, and the composite sheet is matched with the drill sheet to undercut and drill holes in the hole by taking the rotation direction as the edge part during drilling; the compact is preferably a cemented carbide or PDC compact suitable for dry-fire waterless drilling.

Further, the drill plate is engaged with the screw plate. The drill plate is connected with the spiral plate, and rock debris and soil debris can rise to the hole opening along the spiral plate without obstruction in the drilling process.

Further, an inner tube assembly is arranged in the inner cavity of the outer tube assembly. The inner tube assembly is used for collecting the rock core, and the rock core is lifted out when the inner tube assembly is lifted out, so that the rock core can be conveniently analyzed.

Furthermore, the end part of the inner pipe assembly, which is close to the drill bit, is connected with a clamp spring seat, and the inner wall of the clamp spring seat is provided with a clamp spring. The clamp spring is used for increasing the friction with the rock core for the rock core combines as an organic wholely with the inner tube assembly, conveniently gets the core sampling.

Furthermore, the inner wall of the drill bit is provided with an inner tube righting ring for righting the inner tube assembly. The inner tube centralizing ring plays a role in centralizing, and ensures the coaxiality of a core inlet and a drill bit of a pipe orifice part of the inner tube assembly, so that a core smoothly enters.

Furthermore, a seat ring is arranged on the inner wall of one end, connected with the elastic clamping chamber, of the outer pipe of the part of the outer pipe assembly, a suspension ring is arranged on the drill bit assembly of the part of the inner pipe assembly, and the drill bit assembly is fixed on the seat ring through the suspension ring. The seat ring supports the suspension ring to limit the position of the drill bit assembly so that the drill bit assembly does not fall down during drilling.

In order to achieve the purpose, the invention provides another technical scheme that: an inner pipe assembly is arranged in an outer pipe assembly, during drilling, a drill bit is used for dry drilling, the outer pipe assembly and spiral blades on a drill rod are used for reducing resistance and removing chips, after the drill bit drills to a preset depth, the inner pipe assembly fully drilled with a core is taken out from the outer pipe assembly and the drill rod through a rope fishing mechanism on the drill machine, and coring operation is completed.

By adopting the method, the screw plates on the drill rod and the drilling tool are utilized to reduce resistance and remove chips, dry drilling in a flushing-fluid-free mode is realized, efficient rope coring is convenient and quick, coring by lifting a drill is not needed, the labor intensity is low, and the construction efficiency is greatly improved.

The beneficial effects obtained by the invention are as follows: 1. the invention does not need flushing fluid in the drilling process, does not pollute the environment and does not influence the authenticity of the soil sample; 2. the soil sample is taken out, the structure of the soil is clear, and no disturbance is caused; 3. dry drilling of a loose stratum and a collapsed stratum, and stable hole wall without casing; 4. the construction efficiency is high, the washing liquid investment is not needed, and the construction cost is saved; 5. the method has wide application range and is suitable for various sandy soil, soft plastic soil, silt, alluvial soil, residual soil, water-sensitive and formations easy to liquefy when meeting water. The invention is beneficial to the popularization and application of the rope core drilling process in engineering exploration drilling, and can promote the engineering exploration drilling process technology.

Drawings

FIG. 1 is a schematic view of the external structure of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the present invention in an exemplary embodiment;

fig. 3 is a schematic view showing a specific structure of the drill according to the present invention.

Description of reference numerals: 1 drilling rod, 2 outer tube assemblies, 3 inner tube assemblies, 4 drill bits, 5 spiral plates, 21 elastic clamping chambers, 22 seat rings, 23 outer tubes, 31 drilling bit assemblies, 32 clamp spring seats, 33 clamp springs, 311 suspension rings, 41 drilling plates, 411 extending ends, 412 external threads, 42 composite plates and 43 inner tube centralizing rings.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

Referring to fig. 1 and 2, the invention discloses a spiral rope core drill, which comprises a drill rod 1 and an outer pipe assembly 2, wherein the drill rod 1 is connected to one end of the outer pipe assembly 2, the other end of the outer pipe assembly 2 is connected with a drill bit 4 with a hollow structure, and spiral sheets 5 are arranged on the surfaces of the drill bit 4 and the outer pipe assembly 2.

In the present embodiment, the spiral pieces 5 are spirally distributed on the outer surfaces of the drill 4 and the outer tube assembly 2 in parallel with each other. The multiple threads are arranged in parallel as a plurality of spiral sheets 5 in a stacked arrangement with a space between each spiral sheet 5. The number of the plurality of the metal wires can be 2 or more, and is determined according to practical application. The screw flights 5 on the outer part of the drill bit 4 and the surface of the outer pipe assembly 2 are 100-120 mm in pitch, when the outer pipe assembly 2 drives the drill bit 4 to drill, the screw flights 5 can be used as cutting edges to cut soil layers, and rock debris and soil debris rise along with the screw flights to be discharged from orifices.

The drilling end ring of the drill 4 is provided with a plurality of drill bits 41, and the drill bits 41 extend toward the axial center to form an extension end 411. The extended ends 411 of the drill bits 41 form a tapered structure. The outer wall of the drill plate 41 extends in an arc shape and forms an external thread 412 in a circumferential direction. The side of the drill plate 41 is embedded with a composite plate 42. The composite sheet 42 constitutes the blade portion of the drill bit 41 in the direction of rotation of the drill 4. Drill plate 41 engages spiral plate 5.

An inner tube assembly 3 is arranged in the inner cavity of the outer tube assembly 2. The end part of the inner pipe assembly 3 close to the drill bit 4 is connected with a clamp spring seat 32, and the inner wall of the clamp spring seat 32 is provided with a clamp spring 33. The inner wall of the drill bit 4 is provided with an inner tube centralizing ring 43 for centralizing the inner tube assembly 3.

The inner wall of one end of the outer pipe 23 of the outer pipe assembly 2, which is connected with the elastic clamping chamber 21, is provided with a seat ring 22, the drill bit assembly 31 of the inner pipe assembly 3 is provided with a suspension ring 311, and the drill bit assembly 31 is fixed on the seat ring 22 through the suspension ring 311.

The invention discloses a core taking construction method, wherein an inner pipe assembly 3 is arranged in an outer pipe assembly 2, a drill bit 4 is used for dry drilling while drag reduction and chip removal are carried out on the outer pipe assembly 2 and a spiral piece 5 on a drill rod 1, after the drill reaches a preset depth, the inner pipe assembly 3 with a fully drilled core is taken out from the outer pipe assembly 2 and the drill rod 1 through a rope fishing mechanism on a drilling machine, and the core taking operation is completed.

In the specific implementation process of the invention, the inner tube assembly 3 can be detachably arranged in the inner cavity of the outer tube assembly 2, one end of the outer tube assembly 2 is connected with the drill bit 4, and the other end is connected with the elastic clamping chamber 21. The inner pipe assembly 3 is internally provided with the drill bit assembly 31, the drill bit assembly 31 is connected with the rope, the inner pipe assembly 3 is lifted out of the outer pipe assembly 2 when the rope applies tension, and the inner pipe assembly 3 and the rock core entering the inner pipe assembly 3 are lifted out for sampling, the outer pipe assembly 2 and the inner pipe assembly 3 are not required to be integrally disassembled in actual operation, the inner pipe assembly 3 and the drill bit assembly 31 are continuously assembled into the outer pipe assembly 2, and further drilling can be continuously carried out.

In the drilling process, the dry-burning drilling can be carried out under the conditions of no water and no slurry lubrication, and the hard alloy and the PDC composite sheet are embedded on the drill sheet, so that the wear resistance is improved. The rock debris and the soil debris rise along with the spiral sheet 5 and are discharged from the hole opening, and after the drilling of one round is completed, the inner pipe assembly 3 filled with the rock core is lifted out by using a rope, so that the waterless and mud-free rope core drilling is realized.

In summary, the actual samples of the present invention are prepared according to the description and the drawings, and after a plurality of usage tests, the effect of the usage tests proves that the present invention can achieve the expected purpose, and the practical value is undoubted. The above-mentioned embodiments are only for convenience of illustration and not intended to limit the invention in any way, and those skilled in the art will be able to make equivalents of the features of the invention without departing from the technical scope of the invention.

Claims

1. The utility model provides a spiral rope core drill, includes drilling rod (1), outer tube assembly (2), and the one end at outer tube assembly (2) is connected in drilling rod (1), its characterized in that: the drill bit (4) with a hollow structure is connected to the other end of the outer pipe assembly (2), and spiral sheets (5) are arranged on the surfaces of the drill bit (4) and the outer pipe assembly (2).

2. The spiral wire line core drill as recited in claim 1, wherein: the spiral sheets (5) are spirally distributed on the outer surfaces of the drill bit (4) and the outer pipe assembly (2) in a multi-line parallel mode.

3. The spiral wire line core drill as recited in claim 1, wherein: the drilling end ring of the drill bit (4) is provided with a plurality of drill bits (41), and the drill bits (41) extend towards the axial center to form an extension end (411).

4. The spiral wire line core drill as recited in claim 3, wherein: the outer wall of the drill bit (41) extends in an arc shape and forms an external thread (412) in an annular direction.

5. The spiral wire line core drill as recited in claim 3 or 4, wherein: a composite sheet (42) is inlaid on the side edge of the drill sheet (41).

6. The spiral wire line core drill as recited in claim 3, wherein: the drill plate (41) is connected with the spiral plate (5).

7. The spiral wire line core drill as recited in claim 1, wherein: an inner tube assembly (3) is arranged in the inner cavity of the outer tube assembly (2).

8. The spiral wire line core drill as recited in claim 7, wherein: the end part of the inner pipe assembly (3) close to the drill bit (4) is connected with a clamp spring seat (32), and a clamp spring (33) is arranged on the inner wall of the clamp spring seat (32).

9. The spiral wire line core drill as recited in claim 7, wherein: the inner wall of the drill bit (4) is provided with an inner tube righting ring (43) for righting the inner tube assembly (3).

10. A spiral wire line core drill as recited in claim 7, 8 or 9, wherein: the inner wall of one end, connected with the elastic clamping chamber (21), of the outer pipe (23) of the outer pipe assembly (2) is provided with a seat ring (22), the inner wall of one end, connected with the elastic clamping chamber (21), of the drill bit assembly (31) of the inner pipe assembly (3) is provided with a suspension ring (311), and the drill bit assembly (31) is fixed on the seat ring (22) through the suspension ring (311).

11. A core-taking construction method using the core-taking drill as set forth in any one of claims 7 to 10, characterized in that: locate outer tube assembly (2) with inner tube assembly (3), utilize during the drilling bit (4) dry drilling helical blade (5) drag reduction and chip removal on outer tube assembly (2) and drilling rod (1) simultaneously, bore to the predetermined degree of depth after, take out in outer tube assembly (2) and drilling rod (1) inner tube assembly (3) that will bore full core through the rope salvage mechanism on the rig, accomplish the coring operation.