CN102425378A - Threaded drill bit with sliding chutes - Google Patents

Abstract

The invention relates to a threaded drill bit with sliding chutes. The threaded drill bit comprises a hollow drill bit and a sleeve, wherein the sleeve is fixedly arranged in the hollow drill bit, and the outer wall of the sleeve is close to the inner wall of the hollow drill bit. A thread is arranged on the outer wall of the hollow drill bit, the two ends of the hollow drill bit are open, one of the open ends is a core-taking port, and the other open end is matched with a rock core anti-leakage device. A plurality of the sliding chutes are formed on the inner wall of the sleeve, the sliding chutes are matched with a shifting block in the rock core anti-leakage device, the shifting block can move along the sliding chutes, and the movement of the shifting block along the sliding chutes can enable the rock core anti-leakage device to open and close. The threaded drill bit can be matched with a core-taking liner tube of a rotary soft rock layer drilling tool for use and is suitable for rotary core-taking drilling tools. When the drilling tool rotates, a blade can be contracted into the core-taking port of the anti-leakage device, thereby enabling settlings to smoothly enter into a core-taking device, enabling the blade to be in contact with the settlings less and being less prone to abrasion; and the blade can rotate synchronously during core-taking, thereby enabling to the core-taking port to be arranged in the smallest position, cutting off a rock core, ensuring the integrity of the rock core and preventing the rock core from sliding down.

Description

A kind of screw-type drill bit that has chute

Technical field

The invention belongs to the underwater drilling technical field, relate to a kind of screw-type drill bit that has chute.

Background technology

Rotary (all kinds of rig) and penetrated (Churn drill and gravity piston type sampler) two big classes that the deposit core bit is divided into.The penetrated corer is provided with the petal type anti-slip device in lower port usually, with deposit landing and the leakage that prevents that corer is inner.The petal type anti-slip device can not be applicable to rotary core bit, and when drilling tool rotated, petal can hinder deposit to get into corer, and the rotation friction of deposit and petal also can damage petal.The anti-slip device of rotary deposit core bit rock core need adopt the rotation form to realize the variation in aperture.Chute on the drill bit can provide mechanical force for the rotation of leak-proof device.

Summary of the invention

The objective of the invention is to overcome the deficiency of prior art, a kind of screw-type drill bit that has chute is provided.

A kind of screw-type drill bit that has chute comprises hollow boring bit and sleeve, is set with sleeve in the hollow boring bit, and the outer wall of sleeve and the inwall of hollow boring bit are close to.

Described hollow boring bit outer wall is threaded, the hollow boring bit both ends open, and one of them open end is for getting the core mouth, and another open end cooperates with the rock core leak-proof device.

Described sleeve lining has the multiple tracks chute, and shifting block cooperates in described chute and the rock core leak-proof device, and shifting block can move along chute, and shifting block moves along chute can make the folding of rock core leak-proof device.

The step of the method for using of apparatus of the present invention is following:

1) upper bush is connected gets the core liner at its lower end;

When 2) creeping into, shifting block gets in the chute mouth of annulus end face, and shifting block moves in chute, drives blade and rotates around bolt, makes the inner blade of leak-proof device be in compression aperture maximum position;

3) get core before, first backward rotation drilling tool, shifting block withdraws from from the chute of annulus; Under the torsion of torsion circle drove, blade made the inner blade of leak-proof device be in compression aperture minimum position around the bolt reverse rotation; Cut off rock core, and prevent to get rock core landing in the core process.

The present invention and rotary incompetent bed drilling tool are got the supporting use of core bushing pipe, are applicable to rotary core bit, and when drilling tool rotated, blade can shrink in leak-proof device is got the core mouth, make the smooth and easy entering corer of deposit, and blade contacts few with deposit, not easy to wear; When getting core, blade rotates synchronously, makes to get the core mouth and be in minimum position, cuts off rock core, guarantees that rock core is complete, and prevents the rock core landing.

The present invention is suitable for the boring coring of all kinds of incompetent beds, like deposit, soil, frozen soil, ice, is particularly suitable for sedimental boring coring.

Description of drawings

Fig. 1 is apparatus of the present invention structural representation;

Fig. 2 is a rock core leak-proof device sketch map;

Fig. 3 is a partial approach sketch map among Fig. 2;

Fig. 4 is provided with sketch map for blade in the rock core leak-proof device;

Fig. 5 is that shifting block cooperates sketch map with chute;

Fig. 6 (a) is used preceding sketch map for the present invention and rock core leak-proof device;

Fig. 6 (b) is Fig. 6 (a) vertical view;

Fig. 7 (a) is that the present invention and rock core leak-proof device are used the back sketch map;

Fig. 7 (b) is Fig. 7 (a) vertical view;

Among the figure: 1. hollow boring bit, 2. sleeve, 3. chute, 4. upper bush, 5. joint pin, 6. blade, 7. shifting block, 8. lower sleeve, 9. protective cover, 10. bolt, 11 torsion circles.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is described further.

As shown in Figure 1, the screw-type drill bit that has chute comprises hollow boring bit 1 and sleeve 2.Be set with sleeve 2 in the hollow boring bit 1, the inwall of the outer wall of sleeve 2 and hollow boring bit 1 is close to.

Hollow boring bit 1 outer wall is threaded, hollow boring bit 1 both ends open, and one of them open end is for getting the core mouth, and another open end cooperates with the rock core leak-proof device;

Sleeve 2 inwalls have multiple tracks chute 3, and shifting block 7 cooperates in described chute 3 and the rock core leak-proof device, and shifting block 7 can move along chute 3, and shifting block 7 moves along chute 3 can make the folding of rock core leak-proof device.

Like Fig. 2, Fig. 3, shown in Figure 4, the rock core leak-proof device that rotary incompetent bed drilling tool is got core liner at its lower end mouth comprises upper bush 4, joint pin 5, blade 6, shifting block 7, lower sleeve 8, protective cover 9, bolt 10 and torsion circle 11.

Get on the bottom of opening of core bushing pipe and be equipped with upper bush 4, upper bush 4 is connected with lower sleeve 8 through many joint pins 5; Describedly get core bushing pipe, upper bush 4 and lower sleeve 8 coaxial settings; Get the core bushing pipe, upper bush 4 is identical with the external diameter of lower sleeve 8, upper bush 4 is identical with the internal diameter of lower sleeve 8;

Evenly be furnished with a plurality of blades 6 on the end face annulus of lower sleeve 8; Each blade 6 shape is identical and be limited on the end face annulus of lower sleeve 8 by bolt 10, and bolt 10 is threaded with lower sleeve 8, is equipped with torsion circle 11 on the bolt 10; One end of torsion circle 11 and lower sleeve 8 are fixing; The other end and blade 6 are fixing, and each blade 6 can be around bolt 10 rotations, the cross-sectional sizes that the synchronous rotation scalable of a plurality of blades 6 is got the core mouth; Be equipped with protective cover 9 on each bolt 10, the handle of a knife of each blade 6 is provided with shifting block 7.

Upper bush 4 external diameters are with to get the core bushing pipe identical, and internal diameter is slightly less than gets the core bushing pipe, the upper end with get the core bushing pipe and be connected.

Joint pin 5 is a studs, is used to connect upper bush 4 and lower sleeve 8, and every joint pin 5 shape sizes are identical, evenly are connected upper bush 4 end faces and lower sleeve 8 bottom surfaces.

Blade 6 is evenly arranged on the lower sleeve 8 end face annulus, and each blade 6 shape is identical and be limited on the end face annulus of lower sleeve 8 by bolt 10, and each blade 6 can be around bolt 10 rotations, the cross-sectional sizes that the synchronous rotation scalable of a plurality of blades 6 is got the core mouth; The handle of a knife of each blade 6 is provided with shifting block 7.

Shifting block 7 bottoms are circular arc, link to each other with the handle of a knife of blade 6, are used to stir blade 6 around bolt 10 rotations, regulate leak-proof device compression pore size.In order to guarantee that shifting block can get into chute with any position, shifting block bottom surface circular arc is as shown in Figure 5.

Lower sleeve 8 external diameters with get the core bushing pipe, upper bush 4 is identical, internal diameter is identical with upper bush 4, links to each other with upper bush 4 through many joint pins 5.

Protective cover 9 is placed on the bolt 10, is used to protect bolt 10 and torsion circle 11, and foreign material get into when preventing to get core.

Bolt 10 and lower sleeve 8 are used for the end face annulus of spacing blade 6 in lower sleeve 8 through being threaded.

Torsion circle 11 is nested with on bolt 10, and an end of torsion circle 11 and lower sleeve 8 is fixing, and the other end is fixing with blade 6, is used for guaranteeing that leak-proof device compresses the aperture and is in minimum position when initial.

Shown in Fig. 6 (a), 6 (b), 7 (a) and 7 (b), the step of the method for using of apparatus of the present invention is following:

1) upper bush 4 is connected gets the core liner at its lower end;

When 2) creeping into, shifting block 7 gets in 3 mouthfuls of the chutes of sleeves 2 end faces, and shifting block 7 move in chute 3, drives blade 6 around bolt 10 rotations, the inner blade 6 of leak-proof device is in compresses the aperture maximum position;

3) get core before, first backward rotation drilling tool, shifting block 7 withdraws from from the chute 3 of sleeve 2; Under the torsion of torsion circle 11 drove, blade 6 made the inner blade 6 of leak-proof device be in compression aperture minimum position around bolt 10 reverse rotations; Cut off rock core, and prevent to get rock core landing in the core process.

Claims (1)

1. a screw-type drill bit that has chute comprises hollow boring bit and sleeve, it is characterized in that: be set with sleeve in the hollow boring bit, the outer wall of sleeve and the inwall of hollow boring bit are close to;

Described hollow boring bit outer wall is threaded, the hollow boring bit both ends open, and one of them open end is for getting the core mouth, and another open end cooperates with the rock core leak-proof device;

Described sleeve lining has the multiple tracks chute, and shifting block cooperates in described chute and the rock core leak-proof device, and shifting block can move along chute, and shifting block moves along chute can make the folding of rock core leak-proof device.

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