CN215057146U - Diamond bit for thin-wall wire line coring drilling - Google Patents

Abstract

The application relates to a diamond bit for thin-wall wire line coring drilling, which relates to the field of geological core wire line coring drilling and comprises a bit steel body, a plurality of diamond-impregnated tire bodies and a water gap, wherein the plurality of diamond-impregnated tire bodies are fixedly connected with the bit steel body; the mouth of a river sets up to a plurality ofly, and a plurality of mouths of a river distribute with a plurality of diamond-impregnated matrix alternate. This application has the impregnated diamond matrix body with mouth of a river alternate distribution for single impregnated diamond matrix body is when creeping into, and unit area's specific pressure is big, applicable creep into on the ground that skids in fine and close, and can reach the effect that improves and creep into efficiency.

Description

Diamond bit for thin-wall wire line coring drilling

Technical Field

The application relates to the field of geological core wire line coring drilling, in particular to a diamond bit for thin-wall wire line coring drilling.

Background

The rope coring drilling method is characterized by that when the core is cored, it has no need of taking out all drill rods in the drill hole, and uses a special-purpose fishing device with steel wire rope to lift the hole bottom inner tube in which the core is held to ground surface by means of centre hole of drill rod in the hole so as to obtain the core, and the rope coring can be used for drilling surface core, also can be used for drilling core in gallery, and can be developed for marine drilling sampling.

In the related art, chinese application with application number 201120214015.X discloses a turbine drilling tool applicable to rope core drilling, which is composed of an upper drill rod, the turbine drilling tool, an outer pipe of the rope core drilling tool, a suspension sealing joint, an inner pipe of the rope core drilling tool and a drill bit, wherein the turbine drilling tool comprises a turbine housing, a hollow middle shaft, a turbine rotor and a turbine stator; the turbine drilling tool is in threaded connection with an upper drill rod through a hollow center shaft, the lower portion of a turbine shell of the turbine drilling tool is in threaded connection with an outer pipe of the rope core drilling tool, the inner pipe of the rope core drilling tool is also called a core barrel, the core barrel is located in the outer pipe of the rope core drilling tool, the lower portion of the outer pipe of the rope core drilling tool is in threaded connection with a drill bit, the hollow center shaft is located in the turbine shell, a turbine stator is installed on the outer wall of the hollow center shaft, and a turbine rotor is installed on the inner side of the turbine shell. During operation, drilling fluid enters the turbine shell through a drilling fluid circulation channel reserved on the upper portion of the hollow center shaft and pushes the turbine rotor to rotate, the turbine rotor rotates to drive the turbine shell to rotate, the turbine shell drives the rope core drilling tool outer pipe to rotate, the rope core drilling tool outer pipe drives the drill bit to rotate to break rock, the rock core enters the rock core pipe through the drill bit, and after the rock core is filled with the rock core pipe, the rock core pipe is put into the fisher through the steel wire rope to be lifted out of the well.

In recent years, with the gradual promotion of the requirement of domestic green exploration work, portable modular drilling equipment is mature day by day, the portable drilling equipment is favored by customers by the characteristics of light weight, small environmental damage, high construction efficiency and the like, but the problems of the portable modular drilling equipment are also more prominent, the drilling machine mainly adopts a rock breaking mechanism of high rotating speed and low drilling pressure, and the conventional thin-wall rope coring diamond drill bit has the phenomena of slow footage and slippage when being used for drilling in a hard rock-hard rock stratum, so that the drilling efficiency of the drill bit is generally low.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of slow footage and slippage of the conventional thin-wall wire line coring bit in a hard rock-hard rock stratum, the application provides a diamond bit for thin-wall wire line coring drilling.

The application provides a thin wall rope coring drilling uses diamond bit adopts following technical scheme:

a diamond bit for thin-wall rope coring drilling comprises a bit steel body, diamond-impregnated tire bodies and water gaps, wherein the diamond-impregnated tire bodies are arranged in a plurality, the diamond-impregnated tire bodies are fixedly connected with the bit steel body, and the distance between the tops of the adjacent diamond-impregnated tire bodies is larger than the distance between the bottoms of the adjacent diamond-impregnated tire bodies; the mouth of a river is seted up and is a plurality ofly, and a plurality of mouths of a river and a plurality of diamond-impregnated matrix alternate distribution.

By adopting the technical scheme, the selection principle of the impregnated diamond matrix is that the harder the rock is, the softer the hardness of the matrix is, so that the hardness of the impregnated diamond matrix is lower than that of a common impregnated diamond matrix, and the drilling effect of the impregnated diamond matrix is better than that of the common impregnated diamond matrix; the distance between the tops of the adjacent impregnated diamond tire bodies is larger than the distance between the bottoms of the adjacent impregnated diamond tire bodies, so that the specific pressure of a unit area is large when a single impregnated diamond tire body is drilled, the method is suitable for drilling on a compact and slippery ground, and the drilling efficiency can be improved; the diamond-impregnated matrix is distributed at intervals with a large gap from the water gap, so that on the first hand, flushing fluid and slurry can circulate between the drill bit steel body and the diamond-impregnated matrix, and the drill bit steel body and the diamond-impregnated matrix can be cooled well; the second aspect, under the certain condition of flush fluid velocity of flow, the flush fluid volume through the mouth of a river is big in the unit interval, creeps into a large amount of rock powder, detritus and rock sediment that produce, more does benefit to and is carried to ground by the flush fluid of high-speed flow to reduce the wearing and tearing of hole bottom rock powder to drill bit steel body and matrix, improve the detritus efficiency of drill bit.

Optionally, the diamond-impregnated carcass comprises a first carcass block and a second carcass block, the first carcass block is fixedly connected with the drill bit steel body, the second carcass block is fixedly connected with the first carcass block, and the volume of the second carcass block is smaller than that of the first carcass block.

By adopting the technical scheme, the first carcass block and the second carcass block are designed, on one hand, the second carcass block can be stably and fixedly connected with the drill steel body by the first carcass block with the volume larger than the second carcass block; on the other hand, the volume of the second matrix block is smaller than that of the first matrix block, so when the drill bit steel body rotates at a high speed to drive the second matrix block to rotate and cut rocks, the specific pressure of the unit area of the second matrix block in contact with the stratum is larger, rocks are easier to be crushed for a compact slipping stratum, the drilling footage is also faster, and the effect of improving the drilling efficiency is better.

Optionally, the lip surface of the second carcass block is gear-shaped.

Through adopting above-mentioned technical scheme, gear-shaped lip face and the design of big interval distribution for impregnated diamond matrix's tip and rock stratum area of contact are littleer, and the most important utilizes under the portable modularization rig is difficult to the pressurization condition of creeping into, can effectively improve drill bit unit area specific pressure in the shallow hole drilling stage within 300m, when creeping into, impregnated diamond matrix increases the local pressure of rock, and the garrulous rock efficiency of high-speed gyration drill bit improves, creeps into the footage and obtains promoting.

Optionally, diamond grains are inlaid on the inner side and the outer side of the second matrix block.

Through adopting above-mentioned technical scheme, because diamond glomerocryst grain has high hardness and wearability, consequently, set up in, the outer guarantor's footpath diamond gathers the crystalline grain, in the impregnated diamond child of high-speed motion, when outer both sides and rock friction, in the child, the diamond of outer both sides gathers the crystalline grain and also takes place the friction with the rock, because diamond glomerocryst grain loss is little, can play the effect of the impregnated diamond matrix of protection, make the thickness of impregnated diamond matrix be difficult to by wearing and tearing, prevent because of after the wearing and tearing of the inside and outside both sides of impregnated diamond matrix, lead to the drilling diameter to reduce, can't transfer to the hole bottom after the new drill bit of change appears, and in the rock core diameter grow and can't get into the drill bit, so that can't get into the problem of core pipe.

Optionally, the area of the water gap accounts for 50% -60% of the area of the cross section of the drill steel body, and the depth of the water gap is 2-2.5 mm.

By adopting the technical scheme, the area of the water gap of the common thin-wall diamond drill bit is about 25-30%, the depth is 1-1.5 mm, the area of the water gap of the diamond drill bit reaches 50-60%, the depth is 2-2.5 mm, and the area and the depth of the water gap are reasonable, under the premise of ensuring the maximization of the drilling efficiency of the diamond-impregnated matrix to the rock and under the condition of a certain flow rate of the flushing fluid, the amount of the flushing fluid passing through the water gap in unit time is larger, can quickly take away the heat generated in the rock cutting process of the drill bit, has good cooling effect, protects the diamond-impregnated matrix and the drill bit steel body, and a large amount of rock powder, rock debris and rock slag generated by drilling are more favorably carried to the ground by flushing fluid flowing at high speed, thereby reducing the abrasion of the rock powder at the bottom of the hole to the drill bit steel body and the matrix, and improving the service life of the diamond-impregnated matrix and the drill bit steel body and the rock crushing efficiency of the drill bit.

Optionally, an inner water tank is arranged at a water gap on the inner side of the drill steel body; an outer water tank is arranged at the water gap positioned outside the drill steel body.

By adopting the technical scheme, the design of the inner water tank and the outer water tank ensures that high-pressure and high-speed flushing fluid can smoothly flow to the water gap along the inner water tank, then flows to the outer water tank from the water gap, and returns to the annular gap of the drill hole along the outer water tank under the action of pressure difference, and finally the flushing fluid flows back to the ground from the interior of the drill hole, thereby having good cooling effect on the diamond-impregnated matrix and the drill steel body; rock powder generated in the drilling process is carried out to the outside of the drill hole through the sequence of the inner water tank, the water gap and the outer water tank under the action of high-pressure and high-speed flushing liquid, and the rock powder generated in the drill bit flows to the outside of the drill bit more smoothly.

Optionally, an inner water tank of 2-2.5 mm is arranged at the water gap on the inner side of the drill steel body, and an outer water tank of 2-2.5 mm is arranged at the water gap on the outer side of the drill steel body.

Through adopting above-mentioned technical scheme, the internal water tank of ordinary drill bit steel is 1 ~ 1.5mm deep, outer water tank is 1 ~ 1.5mm deep, interior basin in this application is 0.5 ~ 1mm deep than the interior outer water tank of ordinary thin wall diamond drill bit with outer water tank, consequently the deepening of interior basin and outer basin with widen the design, make under the condition that the flush fluid carries coarse grain rock powder, deepen, widen the interior basin of design, outer basin is difficult for blockking up, the rock powder that produces in the drill bit flows to the drill bit outer more smoothly.

Optionally, the largest side wall of the outer water tank is an arc-shaped surface.

By adopting the technical scheme, the design of the arc transition curved surface plays a role in guiding flow, so that the flushing fluid can flow out to the annular gap of the drilled hole smoothly along the outer water tank, the resistance is reduced, the kinetic energy loss of the flushing fluid is reduced, the speed required by the flushing fluid for carrying rock powder is ensured, the flushing fluid is favorable for taking away a large amount of rock powder generated in the drilling process, the rock powder is prevented from being discharged smoothly and accumulating, and the bottom of the hole is ensured to be clean; meanwhile, the arc-shaped transition curved surface design reduces the strength of the erosion action of rock powder particles in the high-speed flowing flushing fluid on the drill steel body, and the purpose of protecting the drill steel body is achieved.

Optionally, the drill steel body is a 35CrMo alloy steel drill steel body.

By adopting the technical scheme, the drill steel body made of the 35CrMo alloy steel has high mechanical strength, impact toughness and fatigue limit, high creep strength and endurance strength at high temperature, long-term working temperature of 500 ℃ and can be better used for drilling of hard rock-hard rock stratum.

In summary, the present application includes at least one of the following beneficial technical effects:

the diamond-impregnated matrix bodies distributed at intervals with the water gap, so that the specific pressure of a unit area is large when a single diamond-impregnated matrix body is drilled, the diamond-impregnated matrix body is suitable for drilling a compact and slippery stratum, and the drilling efficiency can be improved;

the large water gaps distributed at intervals are designed, the area of the water gaps accounts for 50-60% of the area of the cross section of the drill steel body, and the depth of the water gaps is 2-2.5 mm, so that on one hand, circulation of flushing fluid is facilitated, and a good cooling effect is achieved on the drill steel body and the matrix; on the other hand, a large amount of rock powder generated by drilling, particularly coarse-particle rock powder, can be discharged smoothly, so that the rock powder is difficult to accumulate at the bottom of a hole to abrade a diamond bit;

deepening, widen offer of interior basin and outer basin and be linked together with the mouth of a river for the flush fluid that passes through in the drill bit steel body can flow the mouth of a river department along interior basin, and increased unit interval's flow, the rock powder that creeps into the in-process production, carry the rock powder to the drilling outside through interior basin, the mouth of a river, the order of outer basin, especially under the condition of coarse grain rock powder, deepen, widen the interior basin of design, outer basin is difficult for being blockked up, the rock powder that produces in the drill bit flows to the drill bit outer more smoothly.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

fig. 2 is a schematic sectional structure of the present application.

Description of reference numerals: 1. a drill steel body; 2. impregnated with a diamond matrix; 21. a first carcass block; 22. a second carcass block; 3. a water gap; 4. diamond agglomerate grains; 5. an inner water tank; 6. an outer water tank.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses diamond bit for thin-wall wire line coring drilling. Referring to fig. 1, a diamond bit for thin wall rope coring drilling includes drill bit steel body 1, impregnated diamond matrix 2 and mouth of a river 3, and impregnated diamond matrix 2 sets up to a plurality ofly, and mouth of a river 3 is seted up to a plurality ofly, and a plurality of impregnated diamond matrix 2 and a plurality of mouth of a river 3 alternate distribution, a plurality of impregnated diamond matrix 2 and drill bit steel body 1 fixed connection.

When a worker drills a rock, the diamond-impregnated matrix 2 firstly contacts the surface of the rock, and the diamond-impregnated matrix 2 generates friction cutting with the contact surface of the rock under the conditions of high-speed rotation and certain pressure action, so that the aim of crushing the rock is fulfilled; in-process of creeping into, high pressure in the drill bit steel body 1, high-speed flush fluid flow to outer basin 6 along mouth of a river 3 through interior basin 5, the flush fluid is at the annular gap that outer basin 6 went up to drilling and drilling rod formation down under the pressure differential effect, and finally go up to ground from the annular gap in the drilling, the rock powder, detritus and rock sediment that produce when drilling into garrulous rock are taken away in the flush fluid simultaneously, it piles up to reduce the rock powder between drill bit matrix 2 and the rock face, guarantee to creep into the normal clear of work.

Referring to fig. 2, the drill steel body 1 is made of 35CrMo alloy steel, the drill steel body 1 is a cylindrical barrel structure, the drill steel body 1 is far away from the inboard of impregnated diamond matrix 2 one end and is threaded, the drill steel body 1 is in threaded connection with the lower part of the outer pipe of the rope core drilling tool, the wall thickness of the drill steel body 1 close to the impregnated diamond matrix 2 one end is gradually increased, and the inner diameter of the drill steel body 1 close to the impregnated diamond matrix 2 one end is smaller than the inner diameter of the drill steel body 1 far away from the impregnated diamond matrix 2 one end.

Referring to fig. 1, the diamond-impregnated carcass 2 includes a first carcass block 21 having an arc shape and a second carcass block 22 having a gear-shaped lip surface, the second carcass block 22 is located on a side of the first carcass block 21 away from the drill steel body 1, the second carcass block 22 is integrally formed with the first carcass block 21, the first carcass block 21 is inserted into the drill steel body 1 and is sintered and integrally formed with the drill steel body 1 by the same method as described above, and the first carcass block 21 is higher than the drill steel body 1. The side surface of the first matrix block 21 close to the axis of the drill steel body 1 is embedded with one diamond poly-crystal grain 4, the diamond poly-crystal grain 4 is in a long strip shape, the side surface of the first matrix block 21 far away from the axis of the drill steel body 1 is embedded with two diamond poly-crystal grains 4, and the diamond poly-crystal grain 4 is sintered with the first matrix block 21 by the same method to be integrally formed.

When the diamond-impregnated matrix 2 drills a rock, the lip surface of the second matrix block 22 firstly contacts with the rock, under the action of high-speed rotation and certain pressure, diamond particles exposed initially of the second matrix block 22 rub and cut with the rock, and a rock crushing effect is achieved, along with the continuous drilling work, large friction force is provided between the rock and the contact surface of the diamond-impregnated matrix 2, and on the premise that the rock is not easy to slip, the cutting strength of the rock is increased; when the impregnated diamond matrix 2 creeps into the rock, the diamond gathering grains 4 polish the rock, the impregnated diamond matrix 2 is protected, and the wall thickness of the impregnated diamond matrix 2 is effectively prevented from being thinned by polishing.

Referring to fig. 1, a water gap 3 is a gap reserved between adjacent diamond-impregnated matrix bodies 2, the area of the water gap 3 is 50% -60%, the depth of the water gap 3 is 2-2.5 mm, the depth of the water gap 3 is 2mm in the application, an inner water channel 5 with the depth of 2-2.5 mm is formed in the position, at the water gap 3, of the inner side of a drill steel body 1, the depth of the inner water channel 5 is 2mm in the application, and the side face with the largest area of the inner water channel 5 is a plane; the outer water tank 6 with the depth of 2-2.5 mm is arranged at the water gap 3 outside the drill steel body 1, the depth of the outer water tank 6 is 2mm, the side face with the largest area of the outer water tank 6 is an arc-shaped face, and the arc-shaped face of the outer water tank 6 is bent towards the position far away from the axis of the drill steel body 1.

Referring to fig. 1, a method for calculating the area of the nozzle 3: the total area of annular projection generated by orthographic projection of the diamond-impregnated matrix 2 and the water gap 3 is 100%, and the residual area is the area of the water gap 3 except the area of orthographic projection of the second matrix block 22. The depth calculation method of the water gap 3 comprises the following steps: the vertical distance between the top surface of the second matrix block 2 and the top surface of the drill rigid body 1.

From the interior high pressure that passes through of drill bit steel body 1, behind the high-speed flush fluid, the flush fluid flows to outer basin 6 along mouth of a river 3 from interior basin 5, the flush fluid is under the pressure differential effect from outer basin 6 on the annular gap that goes up to drilling and drilling rod formation, and carry the rock dust that creeps into the detritus and produce and flow to the 1 outside of drill bit steel body from impregnated diamond matrix body 2 inboard, and finally go up to ground from the annular gap in the drilling, flush fluid cooling impregnated diamond matrix body 2, when the drill bit steel body 1, the rock dust has been reduced, the abnormal wear of rock dust and rock sediment to impregnated diamond matrix body 2, guarantee to creep into and go on continuously.

The implementation principle of the diamond bit for thin-wall wire line coring drilling in the embodiment of the application is as follows: when a worker drills a rock, the lip surface of the second body block 22 is firstly contacted with the surface of the rock, and under the conditions of high-speed rotation and certain pressure action of the second body block 22, diamond particles exposed initially on the lip surface of the second body block 22 are subjected to friction cutting with the contact surface of the rock, so that the purpose of rock crushing is achieved; along with the continuous operation of drilling work, the cutting strength of the rock is increased on the premise of not slipping easily; when creeping into, from the interior high pressure of drill bit steel body 1, behind the high-speed flush fluid, the flush fluid flows to outer basin 6 along mouth of a river 3 from interior basin 5, the flush fluid is at the annular gap that outer basin 6 went up to drilling and drilling rod formation down under the pressure differential effect, and carry the rock dust that creeps into the detritus and produce and flow to the 1 outside of drill bit steel body from impregnated diamond matrix body 2 inboard, and finally go up to ground from the annular gap in the drilling, flush fluid cooling impregnated diamond matrix body 2, in the drill bit steel body 1, the rock dust has been reduced, rock debris and rock sediment are to impregnated diamond matrix body 2's abnormal wear, guarantee to creep into and go on continuously.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A thin wall wire line coring drilling uses the diamond bit, characterized by that: the drill bit comprises a drill bit steel body (1), diamond-impregnated tire bodies (2) and a water gap (3), wherein the diamond-impregnated tire bodies (2) are arranged in a plurality, the diamond-impregnated tire bodies (2) are fixedly connected with the drill bit steel body (1), and the distance between the tops of the adjacent diamond-impregnated tire bodies (2) is larger than the distance between the bottoms of the adjacent diamond-impregnated tire bodies (2); the water gaps (3) are arranged in a plurality, and the water gaps (3) and the diamond-impregnated tire bodies (2) are distributed at intervals.

2. A diamond drill bit for thin wall wire line core drilling according to claim 1, wherein: the diamond-impregnated carcass (2) comprises a first carcass block (21) and a second carcass block (22), wherein the first carcass block (21) is fixedly connected with the drill bit steel body (1), the second carcass block (22) is fixedly connected with the first carcass block (21), and the volume of the second carcass block (22) is smaller than that of the first carcass block (21).

3. A diamond drill bit for thin wall wire line core drilling according to claim 2, wherein: the lip surface of the second carcass block (22) is gear-shaped.

4. A diamond drill bit for thin wall wire line core drilling according to claim 2, wherein: diamond grains (4) are embedded in the inner side and the outer side of the second body block (22).

5. A diamond drill bit for thin wall wire line core drilling according to claim 1, wherein: the area of the water gap (3) accounts for 50-60% of the cross section area of the drill steel body (1), and the depth of the water gap (3) is 2-2.5 mm.

6. A diamond drill bit for thin wall wire line core drilling according to claim 1, wherein: an inner water tank (5) is arranged at the water gap (3) on the inner side of the drill steel body (1); an outer water tank (6) is arranged at the water gap (3) positioned at the outer side of the drill steel body (1).

7. The diamond drill bit for thin wall wire core drilling according to claim 6, wherein: the largest side wall of the outer water tank (6) is an arc-shaped surface.

8. A diamond drill bit for thin wall wire line core drilling according to claim 1, wherein: the drill bit steel body (1) is a 35CrMo alloy steel drill bit steel body.

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