CN210440000U

CN210440000U - Core drilling tool with internal spiral core

Info

Publication number: CN210440000U
Application number: CN201921153526.8U
Authority: CN
Inventors: 李传顺; 吴冬华
Original assignee: Hunan Puli Marine Technology Co ltd; First Institute of Oceanography MNR
Current assignee: Hunan Puli Marine Technology Co ltd; First Institute of Oceanography MNR
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-05-01
Anticipated expiration: 2029-07-22

Abstract

The utility model relates to the field of mineral resource collection, in particular to a core drilling tool with an inner screw, which comprises a joint, an outer pipe, a flow guide block, an inner pipe and a drill bit, wherein the joint is tubular; the outer pipe is butted with the joint; the flow guide block is arranged in the outer pipe and close to the joint; the inner pipe is arranged on the flow guide block and sleeved in the outer pipe, and the inner surface of the inner pipe is provided with a spiral guide strip; the drill bit is tubular and is installed on the free end of the outer pipe in a butt joint mode, the drill bit blocks the annular cavity between the outer pipe and the inner pipe, and a drainage hole which is communicated with the annular cavity and the external environment is formed in the drill bit. And the flow guide block is provided with a flow guide hole for communicating the inside of the joint and the annular cavity, and the flow guide block is also provided with a drain hole for communicating the inside of the inner pipe and the external environment. The spiral guide strip of the inner pipe has upward conveying force on the core, so that the problem that the core is blocked in the drill pipe is effectively solved.

Description

Core drilling tool with internal spiral core

Technical Field

The utility model relates to a mineral resources gathers the field, especially relates to a spiral rock core drilling tool in area.

Background

The sea is a huge treasury of human beings, contains a large amount of resources, and is also very rich in seabed mineral resources besides more than 80 elements such as hydrogen, oxygen, chlorine, sodium, magnesium, calcium, potassium, gold, uranium, bromine, iodine and the like in the sea water. The cobalt-rich crusts are mainly distributed on the tops and slopes of the seamountains or sea tables with the depth of 1000-3000 m; hydrothermal polymetallic sulfides are mainly distributed on top of the active ocean ridges at a water depth of 2600 m. In the resource investigation of submarine mineral resources such as cobalt-rich crusts and hydrothermal polymetallic sulfides, sampling is required.

In the drilling of loose and fragile strata such as sulfide of hydrothermal solution polymetallic, when a traditional single-action double-tube drilling tool is used for coring, the loose and broken rock core is easy to block in a rock core tube, once the rock core is blocked, the rock core is easy to wear only at a drill bit, the rock core cannot enter the inner tube, and the drill bit and internal components thereof are easy to damage. When the traditional single-action double-tube drilling tool is used for extracting the rock core, the rock core is clamped by a clamp spring and then extracted. For loose and broken stratum, the clamp spring cannot play its role, and the clamp spring is also easily blocked by the rock core.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at providing a spiral rock core coring drilling tool in area aims at solving the easy stifled problem of card of current coring drilling tool.

(II) technical scheme

In order to achieve the above object, the utility model discloses an in-band spiral rock core coring drilling tool includes:

a fitting in the shape of a tube;

an outer tube that interfaces with the fitting;

the flow guide block is arranged in the outer pipe and is close to the joint;

the inner pipe is arranged on the flow guide block and sleeved in the outer pipe, the inner pipe and the outer pipe rotate synchronously, and a spiral guide strip is arranged on the inner surface of the inner pipe; and

the drill bit is tubular and is installed on the free end of the outer pipe in a butt joint mode, the drill bit blocks the annular cavity between the outer pipe and the inner pipe, and drainage holes communicated with the annular cavity and the external environment are formed in the drill bit;

the guide block is provided with a guide hole for communicating the inside of the joint with the annular cavity, and the guide block is also provided with a drain hole for communicating the inside of the inner pipe with the external environment.

Preferably, the core drilling tool with the inner spiral further comprises a stop ring, and the stop ring is arranged between the inner tube and the drill bit so as to prevent the core entering the inner tube from falling out.

Preferably, the blocking ring comprises a clamping ring clamped between the inner tube and the drill bit and a plurality of blocking petals arranged on the clamping ring, the blocking petals are distributed at intervals along the circumferential direction of the clamping ring, and the free ends of the blocking petals are close to each other in the inner tube.

Preferably, the deflector comprises a base plate and a mounting ring disposed on one side of the base plate, and one end of the inner tube is mounted in the mounting ring.

Preferably, the edge of the base plate is provided with a diversion trench, and the diversion trench is matched with the outer pipe to form the diversion hole.

Preferably, the number of the drain holes is multiple, the drain holes are distributed on the mounting ring at intervals, and the outer tube is provided with communication holes correspondingly communicated with the drain holes.

Preferably, the helical guide strip has an inner diameter greater than or equal to the inner diameter of the drill bit.

Preferably, a reamer is disposed on an outer surface of the outer tube, and the drill bit is mounted on the outer tube through the reamer.

Preferably, the drainage hole is multiple in number, and the drainage holes are distributed in the pipe wall of the drill bit at intervals along the circumferential direction of the drill bit.

Preferably, the drainage hole comprises a drainage section and drainage grooves, the extension direction of the drainage section is parallel to the axial direction of the drill bit and is communicated with the annular cavity and the drainage grooves, and the drainage grooves are distributed on the free end surface of the drill bit and extend to the outer surface of the drill bit along the radial direction of the drill bit.

(III) advantageous effects

The utility model has the advantages that: firstly, a spiral guide strip is arranged in the inner pipe, and the spiral direction and the rotation direction of the drilling tool form an upward conveying direction; for example, when the spiral direction is clockwise, and the drilling tool rotates clockwise, the spiral guide strip of the inner pipe has upward conveying force on the core, so that the problem that the core is blocked in the drilling pipe is effectively solved.

Secondly, the flushing liquid guided in from the joint flows into an annular cavity between the inner pipe and the outer pipe after being shunted by the diversion holes of the diversion block, and flows out of the middle of the drill bit cutter through the drainage hole of the drill bit. The inner tube passes through water conservancy diversion piece and outer tube rigid connection, and after the rock core got into the inner tube, the water of inner tube was outside the drilling tool through the wash port of water conservancy diversion piece to promote the effective content of rock core when single coring, also can guarantee the integrality of rock core. The guide holes on the guide block are not communicated with the drain holes to respectively play a role, the guide holes are interlayers between the communication joint and the inner pipe and the outer pipe, and the drain holes are communicated with the inner pipe and the outer part of the drilling tool, so that an optimized guide and drain strategy is obtained to adapt to different coring working conditions.

Drawings

FIG. 1 is a schematic cross-sectional view of an in-band spiral core drill of the present invention;

FIG. 2 is an enlarged cross-sectional view of the upper portion of the core drill with internal spiral of the present invention;

FIG. 3 is an enlarged cross-sectional view of the lower portion of the core drill with internal spiral according to the present invention;

fig. 4 is a schematic cross-sectional view of the inner tube of the core drill with internal spiral according to the present invention.

[ description of reference ]

100: a core drilling tool with an internal spiral core; 1: a joint; 2: a flow guide block; 21: a substrate; 22: a mounting ring; 23: a flow guide hole; 24: a drain hole; 3: an outer tube; 31: an annular cavity; 4: an inner tube; 41: a helical guide strip; 5: a reamer; 6: a blocking ring; 61: a snap ring; 62: a barrier flap; 7: a drill bit; 71: a drainage aperture; 711: a drainage section; 712: and a drainage groove.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 to 3, the present invention provides an in-band spiral core drilling tool 100, which includes a joint 1, an outer tube 3, a flow guide block 2, an inner tube 4 and a drill bit 7, wherein the joint 1 is tubular; the outer pipe 3 is butted with the joint 1; the flow guide block 2 is arranged in the outer pipe 3 and close to the joint 1; the inner pipe 4 is arranged on the flow guide block 2 and sleeved in the outer pipe 3, the inner pipe 4 and the outer pipe 3 synchronously rotate, and the inner surface of the inner pipe 4 is provided with a spiral guide strip 41; the drill bit 7 is tubular and is butt-mounted on the free end of the outer tube 3, the drill bit 7 blocks the annular cavity 31 between the outer tube 3 and the inner tube 4, and the drill bit 7 is provided with a drainage hole 71 communicating the annular cavity 31 with the external environment. And, set up the inside that connects 1 and the water conservancy diversion hole 23 of annular chamber 31 on the water conservancy diversion piece 2, still set up the wash port 24 that communicates the inside of inner tube 4 and external environment on the water conservancy diversion piece 2. The outer pipe 3, the flow guide block 2 and the inner pipe 4 can be fixedly connected and mounted or can be relatively rotatably mounted. When the outer pipe 3, the flow guide block 2 and the inner pipe 4 are fixedly mounted, the core taking device can be integrally driven, and the outer pipe 3 and the inner pipe 4 synchronously rotate; when the outer tube 3 and the inner tube 4 are rotatably mounted to each other, the driving mechanism may be connected to the outer tube 3 or the inner tube 4 through a multi-stage connecting tube, so that the outer tube 3 and the inner tube 4 can rotate synchronously, and the synchronous rotation of the outer tube 3 and the inner tube 4 may be implemented by a suitable bearing or a planetary gear set.

Firstly, a spiral guide strip 41 is arranged in the inner tube 4, and the spiral direction and the rotation direction of the core drilling tool 100 with the inner spiral form an upward conveying direction; for example, when the spiral direction is clockwise (see fig. 4) and the core drilling tool 100 with the internal spiral rotates clockwise, the spiral guide bars 41 of the inner tube 4 transmit upward force to the core, thereby effectively solving the problem of blockage of the core in the drill pipe. Alternatively, when the spiral direction of the spiral guide bars 41 is counterclockwise and the core drill 100 with the spiral therein is rotated counterclockwise, the spiral guide bars 41 of the inner tube 4 also transmit upward force to the core.

Then, the flushing liquid introduced from the joint 1 is divided by the flow guiding holes 23 of the flow guiding block 2, enters the annular cavity 31 between the inner pipe 4 and the outer pipe 3, and flows out of the drill bit 7 through the drainage hole 71 of the drill bit 7, and due to the flow guiding holes 23 on the drill bit 7, the flushing liquid is flushed from the inside to the outer periphery of the drill bit 7, so that the drilling efficiency of the drilling tool is improved. The inner tube 4 is rigidly connected with the outer tube 3 through the flow guide block 2, and after the core enters the inner tube 4, water in the inner tube 4 is discharged out of the drilling tool through the water discharge hole 24 of the flow guide block 2, so that the effective content of the core is improved during single coring, and the integrity of the core can be ensured. The guide holes 23 and the drain holes 24 on the guide block 2 are not communicated with each other and respectively play a role, the guide holes 23 are interlayers between the communication joint 1 and the inner pipe 4 and the outer pipe 3, and the drain holes 24 are interlayers for communicating the inner pipe 4 and the outer part of the drilling tool, so that an optimized guide and drainage strategy is obtained to adapt to different coring working conditions.

In order to better lift the obtained core and prevent the core entering the inner tube 4 from falling out again, the core drilling tool 100 with the inner spiral may further include a stop ring 6, as shown in fig. 1 and 3, the stop ring 6 is disposed between the inner tube 4 and the drill bit 7 to prevent the core entering the inner tube 4 from falling out. The stop ring 6 is clamped between the lower end face of the inner tube 4 and the annular stepped face in the drill bit 7 along the axis direction, and is fixed by up-down extrusion, so that the installation stability is ensured, and the stop ring cannot fall off in the high-speed rotation process of coring work.

Referring to fig. 3 again, the blocking ring 6 may include a clamping ring 61 clamped between the inner tube 4 and the drill bit 7 and a plurality of blocking flaps 62 arranged on the clamping ring 61, the plurality of blocking flaps 62 are circumferentially spaced apart from each other along the clamping ring 61, and free ends of the plurality of blocking flaps 62 are close to each other in the inner tube 4. The blocking petals 62 extend along an arc line to form a petal-shaped structure, and the multi-petal blocking petals 62 extend upwards in the inner tube 4 to form a petal shape together. When the rock core entered from drill bit 7, can follow upwards the extrusion from the bottom and block lamella 62, and the bivalve that makes the petal shape blocks lamella 62 and is the open mode, and after the rock core was through the hindrance that blocks lamella 62, the bivalve blockked lamella 62 and resumes the petal shape again to can prevent to get into the rock core in inner tube 4 and fall out once more, with the efficiency that improves the rock core coring, also can promote the integrality of rock core coring.

Further, as shown in fig. 2, the baffle block 2 includes a base plate 21 and a mounting ring 22 disposed on one side of the base plate 21, and one end of the inner tube 4 is mounted in the mounting ring 22. The periphery of the base plate 21 may be fittingly engaged with the outer tube 3, or the baffle block 2 and the outer tube 3 may be integrally formed. In a preferred embodiment, the mounting ring 22 on the underside of the base plate 21 is internally threaded, the upper end of the inner tube 4 is threadedly connected to the mounting ring 22, the lower end of the fitting 1 is also externally threaded, and the upper end of the outer tube 3 may be threadedly connected to the lower end of the fitting 1. Alternatively, in other embodiments, the upper end of the inner tube 4 and the mounting ring 22 or the upper end of the outer tube 3 may be connected to the lower end of the joint 1, or may be connected by a fastener, welded, or the like.

In addition, the edge of the base plate 21 is provided with a diversion trench, the diversion trench is matched with the outer tube 3 to form diversion holes 23 (see fig. 2), wherein the number of the diversion holes 23 can be at least one, and the diversion holes 23 are distributed at intervals; meanwhile, the number of the drain holes 24 may be multiple, and the plurality of drain holes 24 are distributed on the mounting ring 22 at intervals, and the outer tube 3 is provided with communication holes correspondingly communicated with the drain holes 24. On a projection plane of the spiral core drill 100 with the inner screw, which is perpendicular to the axis, the diversion hole 23 does not coincide with the drainage hole 24, so that the flow path of the flushing fluid and the drainage flow path of the inner tube 4 are prevented from interfering with each other, and the flow path of the flushing fluid and the drainage flow path of the inner tube 4 are completely independent from each other.

In addition, as shown in fig. 3, the inner diameter of the helical guide strip 41 is greater than or equal to the inner diameter of the drill 7. The inner diameter of the spiral guide bar 41 formed inside the inner tube 4 is not smaller than the cutting inner diameter of the drill bit 7, as indicated by d1 ≧ d2 in FIG. 3. So set up and to make in-band spiral core drilling tool 100 at rotatory in-process, reduce the downward reaction force of feeding back by spiral gib block 41, and have sufficient space to hold the rock core that has got into in inner tube 4 in the inner tube 4, so that the rock core that has got into in inner tube 4 can extrude the rock core that is getting into inner tube 4 from drill bit 7 to a lesser extent, thereby reduce the rock core and get into the hindrance in the inner tube 4 from drill bit 7, moreover, the internal diameter of drill bit 7 is less, can also prevent to a certain extent that the rock core that has got into in inner tube 4 from falling out once more.

Referring again to fig. 2, the outer surface of the outer tube 3 is provided with a reamer 5, and the drill bit 7 is mounted on the outer tube 3 through the reamer 5, so that the drill bit 7 can be mounted more firmly. Further, the reamer 5 can correct the hole diameter of the drilled hole when used in conjunction with the drill 7, so as to prevent the drill 7 from being worn and damaged by the replacement of the new drill 7 when the hole diameter is reduced. In addition, the underreamer 5 also functions to stabilize and centralize the in-band spiral core drill 100.

Further, referring again to fig. 3, in a preferred embodiment, the drainage hole 71 is plural in number, and the plural drainage holes 71 are distributed in the pipe wall of the drill bit 7 at intervals along the circumferential direction of the drill bit 7. By spraying flushing fluid to the core through the drainage holes 71 during the rotation of the in-band spiral core drilling tool 100, the clamping stagnation of the drill bit 7 during the drilling process can be reduced, so that the drilling efficiency of the in-band spiral core drilling tool 100 is improved.

The drainage hole 71 may include a drainage segment 711 and drainage grooves 712, the drainage segment 711 extends in a direction parallel to the axial direction of the drill bit 7 and communicates the annular cavity 31 with the drainage grooves 712, and the drainage grooves 712 are distributed on the free end surface of the drill bit 7 and extend to the outer surface of the drill bit 7 in the radial direction of the drill bit 7. The flow-directing section 711 is able to direct the flushing liquid introduced from the coupling 1 and flowing through the annular chamber 31 towards the flow-directing groove 712, the flow-directing section 711 extending vertically downwards (with reference to the orientation of fig. 3) and no longer having bends, so as to allow a smoother flow of the flushing liquid. The drainage channel 712 is a semi-open structure, that is, the flushing fluid can be sprayed downwards from the bottom of the drill bit 7, or can be sprayed out along the radial outer side surface of the drill bit 7, and under the action of the centrifugal force during the high-speed rotation of the in-band spiral core drilling tool 100, the flushing fluid sprayed in two directions can form continuous spiral spray, so that the flushing effect on the core is improved.

The following will be taken as an example with outer tube 3, water conservancy diversion piece 2 and inner tube 4 as fixed mounting mode, it is right the utility model discloses an in-band spiral rock core drilling tool 100's working process carries out the detailed description, further explains the technical scheme of the utility model.

Firstly, installing an internal spiral core drilling tool 100 on a core drilling device through a connector 1, and driving the internal spiral core drilling tool 100 to integrally rotate (synchronously rotating an inner pipe 4 and an outer pipe 3) by the core drilling device and gradually move to be close to a core; when the drill bit 7 is close to the rock core, the flushing liquid is introduced into the drill bit 7 from the connector 1, and the flushing liquid can be sprayed to the rock core to help the drill bit 7 drill the rock core.

Then, the core captured by the drill bit 7 breaks the blocking ring 6 and enters the inner tube 4, and is gradually conveyed upwards under the action of the upward conveying force of the spiral guide strip 41 until the core reaches the vicinity of the flow guide block 2, and water carried by the core can be discharged out of the outer tube 3 through the water discharge hole 24. And (4) continuously performing the actions until the inner pipe 4 is filled with the rock core, then lifting the coring equipment upwards, taking down the internal spiral rock core coring drilling tool 100, and completing the rock core coring operation.

It should be understood that the above description of the embodiments of the present invention is only for illustrating the technical lines and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, but the present invention is not limited to the above specific embodiments. All changes and modifications that come within the scope of the claims are to be embraced within their scope.

Claims

1. The utility model provides an in-band spiral core drilling tool, its characterized in that, in-band spiral core drilling tool includes:

a fitting in the shape of a tube;

an outer tube that interfaces with the fitting;

the flow guide block is arranged in the outer pipe and is close to the joint;

2. The in-band helical core coring drill of claim 1, wherein: the core drilling tool with the inner spiral core further comprises a stop ring, and the stop ring is arranged between the inner tube and the drill bit so as to prevent the core entering the inner tube from falling out.

3. The in-band helical core coring drill of claim 2, wherein: the stop ring is including the card locate the inner tube with joint ring between the drill bit with set up in the multilobe on the joint ring blocks the lamella, the multilobe blocks the lamella and follows the circumference interval distribution of joint ring, and the multilobe blocks the free end of lamella and is in draw close each other in the inner tube.

4. The in-band helical core coring drill of any one of claims 1-3, wherein: the flow guide block comprises a substrate and a mounting ring arranged on one side surface of the substrate, and one end of the inner pipe is mounted in the mounting ring.

5. The in-band helical core coring drill of claim 4, wherein: the edge of the base plate is provided with a diversion trench, and the diversion trench is matched with the outer pipe to form the diversion hole.

6. The in-band helical core coring drill of claim 4, wherein: the number of the drain holes is multiple, the drain holes are distributed on the mounting ring at intervals, and the outer pipe is provided with communicating holes correspondingly communicated with the drain holes.

7. The in-band helical core coring drill of any one of claims 1-3, wherein: the inner diameter of the spiral guide strip is larger than or equal to the inner diameter of the drill bit.

8. The in-band helical core coring drill of any one of claims 1-3, wherein: and the outer surface of the outer pipe is provided with a reamer, and the drill bit is arranged on the outer pipe through the reamer.

9. The in-band helical core coring drill of any one of claims 1-3, wherein: the drainage holes are distributed in the pipe wall of the drill bit at intervals along the circumferential direction of the drill bit.

10. The in-band helical core coring drill of any one of claims 1-3, wherein: the drainage hole comprises a drainage section and drainage grooves, the extension direction of the drainage section is parallel to the axial direction of the drill bit and is communicated with the annular cavity and the drainage grooves, and the drainage grooves are distributed on the free end surface of the drill bit and extend to the outer surface of the drill bit along the radial direction of the drill bit.