CN202325338U - Rock core leakage prevention device arranged at lower port of coring lining tube of rotary soft formation drilling rig - Google Patents

Abstract

The utility model relates to a rock core leakage prevention device arranged at a lower port of a coring lining tube of a rotary soft formation drilling rig. An upper sleeve is sleeved at an opened bottom end of the coring lining tube, and is connected with a lower sleeve via a plurality of connecting columns, a plurality of blades are uniformly arranged on a ring at the top of the lower sleeve, shapes of the blades are identical, the blades are limited on the ring at the top of the lower sleeve via bolts, the bolts are connected with the lower sleeve in a threaded manner, torsion rings are sleeved on the bolts, one end of each torsion ring is fixed with the lower sleeve, the other end of each torsion ring is fixed with the corresponding blade, each blade can rotate surrounding the corresponding bolt, the size of the section of a coring opening can be adjusted due to synchronous rotation of the blades, each bolt is sleeved with a protective cover, and a shifting block is arranged on a hilt of each blade. The rock core leakage prevention device is used with the coring lining tube of the rotary soft formation drilling rig, the blades applicable to the rotary coring drilling rig can retract into the coring opening of the leakage prevention device, and accordingly sediments can smoothly enter a coring device.

Description

A kind of rotary incompetent bed drilling tool is got the rock core leak-proof device of core liner at its lower end mouth

Technical field

The utility model belongs to the underwater drilling technical field, relates to the rock core leak-proof device that a kind of rotary incompetent bed drilling tool is got core liner at its lower end mouth.

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 purpose of the utility model is the deficiency that overcomes prior art, and a kind of screw-type drill bit that has chute is provided.

The rock core leak-proof device that a kind of rotary incompetent bed drilling tool is got core liner at its lower end mouth comprises upper bush, lower sleeve, joint pin, protective cover, bolt, torsion circle, blade and shifting block.

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

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

The step of the method for using of the utility model device 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 utility model 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 utility model 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 the utility model structural representation;

Fig. 2 is a partial enlarged drawing among Fig. 1;

Fig. 3 is the blade arrangement sketch map;

Fig. 4 is that shifting block cooperates sketch map with chute;

Fig. 5 is the hollow boring bit sketch map that has chute;

Fig. 6 (a) is used preceding sketch map for the utility model and screw-type drill bit;

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

Fig. 7 (a) is that the utility model and screw-type drill bit are used the back sketch map;

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

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

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described further.

Like Fig. 1, Fig. 2, shown in Figure 3, the rock core leak-proof device that rotary incompetent bed drilling tool is got core liner at its lower end mouth comprises upper bush 1, joint pin 2, blade 3, shifting block 4, lower sleeve 5, protective cover 6, bolt 7 and torsion circle 8.

Get on the bottom of opening of core bushing pipe and be equipped with upper bush 1, upper bush 1 is connected with lower sleeve 5 through many joint pins 2; Describedly get core bushing pipe, upper bush 1 and lower sleeve 5 coaxial settings; Get the core bushing pipe, upper bush 1 is identical with the external diameter of lower sleeve 5, upper bush 1 is identical with the internal diameter of lower sleeve 5;

Evenly be furnished with a plurality of blades 3 on the end face annulus of lower sleeve 8; Each blade 3 shape is identical and be limited on the end face annulus of lower sleeve 5 by bolt 7, and bolt 7 is threaded with lower sleeve 5, is equipped with torsion circle 8 on the bolt 7; One end of torsion circle 8 and lower sleeve 5 are fixing; The other end and blade 3 are fixing, and each blade 3 can be around bolt 7 rotations, the cross-sectional sizes that the synchronous rotation scalable of a plurality of blades 3 is got the core mouth; Be equipped with protective cover 6 on each bolt 7, the handle of a knife of each blade 3 is provided with shifting block 4.

Described upper bush 1 external diameter is 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.

Described joint pin 2 is a studs, is used to connect upper bush 1 and lower sleeve 5, and every joint pin 2 shape sizes are identical, evenly are connected upper bush 1 end face and lower sleeve 5 bottom surfaces.

Described blade 3 is evenly arranged on the lower sleeve 5 end face annulus, and each blade 3 shape is identical and be limited on the end face annulus of lower sleeve 5 by bolt 7, and each blade 3 can be around bolt 7 rotations, the cross-sectional sizes that the synchronous rotation scalable of a plurality of blades 3 is got the core mouth; The handle of a knife of each blade 3 is provided with shifting block 4.

Described shifting block 4 bottoms are circular arc, link to each other with the handle of a knife of blade 3, are used to stir blade 3 around bolt 7 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 4.

Described lower sleeve 5 external diameters with get the core bushing pipe, upper bush 1 is identical, internal diameter is identical with upper bush 1, links to each other with upper bush 1 through many joint pins 2.

Described protective cover 6 is placed on the bolt 7, is used to protect bolt 7 and torsion circle 8, and foreign material get into when preventing to get core.

Described bolt 7 and lower sleeve 5 are used for the end face annulus of spacing blade 3 in lower sleeve 5 through being threaded.

Described torsion circle 8 is nested with on bolt 7, and an end of torsion circle 8 and lower sleeve 5 is fixing, and the other end is fixing with blade 3, is used for guaranteeing that leak-proof device compresses the aperture and is in minimum position when initial.

As shown in Figure 5, the screw-type drill bit that has chute comprises hollow boring bit 10, sleeve 11.Sleeve 11 external diameters are identical with hollow boring bit 10, are connected with hollow boring bit 10 through screw thread, and multiple tracks chute 9 is evenly distributed on the sleeve 11, chute 9 mutually noninterferes.

Described hollow boring bit 10 is for having externally threaded hollow boring bit, as the matrix of sleeve.

Described sleeve 11 external diameters are identical with open-core type drill bit 10; Internal diameter is with to get core bushing pipe, upper bush 1, lower sleeve 5 identical, and sleeve 11 end faces have multiple tracks chute mouth, and the chute mouth is identical with shifting block 8 width; And the chute mouth is covered with entire sleeve 11 end faces, guarantees that shifting block can be at arbitrarily angled entering chute.Chute deviation angle and initial blade the angle that will rotate identical.

Shown in Fig. 6 (a), 6 (b), 7 (a) and 7 (b), the step of the method for using of the utility model device is following:

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

When 2) creeping into, shifting block 4 gets in 9 mouthfuls of the chutes of sleeves 11 end faces, and shifting block 4 move in chute 9, drives blade 3 around bolt 7 rotations, the inner blade 3 of leak-proof device is in compresses the aperture maximum position;

3) get core before, first backward rotation drilling tool, shifting block 4 withdraws from from the chute 9 of sleeve 11; Under the torsion of torsion circle 8 drove, blade 3 made the inner blade 3 of leak-proof device be in compression aperture minimum position around bolt 7 reverse rotations; Cut off rock core, and prevent to get rock core landing in the core process.

Claims (1)

1. a rotary incompetent bed drilling tool is got the rock core leak-proof device of core liner at its lower end mouth; Comprise upper bush, lower sleeve, joint pin, protective cover, bolt, torsion circle, blade and shifting block; It is characterized in that: get on the bottom of opening of core bushing pipe and be equipped with upper bush, upper bush is connected with lower sleeve through many joint pins; Describedly get the coaxial setting of core bushing pipe, upper bush and lower sleeve, the external diameter of getting core bushing pipe, upper bush and lower sleeve is identical, and the internal diameter of upper bush and lower sleeve is identical;

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

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