CN204252831U

CN204252831U - The anti-bending drilling tool of half period self-correction

Info

Publication number: CN204252831U
Application number: CN201420696495.1U
Authority: CN
Inventors: 夏本玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-20
Filing date: 2014-11-20
Publication date: 2015-04-08
Anticipated expiration: 2024-11-20

Abstract

The utility model relates to the anti-bending drilling tool of a kind of half period self-correction, comprise drill bit and outer tube, it is characterized in that: outer tube is by upper, lower basket composition, upper basket upper end is connected with eccentric part, eccentric body on the even rectangular alloy of welding-on on the hemicycle side face of upper eccentric part, on, lower eccentric part is connected with between lower basket, the reverse eccentric body of the even rectangular alloy of welding-on on the hemicycle side face of lower eccentric part, be furnished with two semicircle side face differences 180 degree of eccentric body and the reverse eccentric body of alloy on alloy respectively, drill bit is off-balance bit, be connected to lower basket lower end, the highest eccentric point of off-balance bit and the highest eccentric point of upper eccentric part are positioned on the same bus I of drilling tool, the highest eccentric point of lower eccentric part is positioned at differing on the bus II of 180 degree with bus I of drilling tool.Its structure is simple, principle is ingenious, be easy to processing, anti-bending remarkably productive, practical, drilling efficiency is high, fundamentally solve when carrying out earth drilling construction and to hole flexible problem.

Description

The anti-bending drilling tool of half period self-correction

Technical field

The utility model relates to the drilling tool of earth drilling construction, particularly the anti-bending drilling tool of a kind of half period self-correction.

Background technology

When carrying out earth drilling construction, owing to being subject to the impact of the many reasons such as earth formation, usually hole deviation can be caused; what increase drilling tool after hole deviation creeps into resistance, causes drilling rod to fracture, and cannot continue construction; scrap boring, or drilling quality is defective, thus causes very large economic loss.The construction of earth drilling is with a long history, a lot of expert and technician are in the anti-bending problem that continuous research and inquirement is holed, prevent the method for hole deviation from comprising increasing boring aperture at present, reduce drilling pressure, drilling tool installs guider etc. additional, and it has certain control action to the bending of keyhole inclination angle, but the effect that its keyhole orientation bends is poor, adopt said method to have a strong impact on drilling efficiency, some boards 24 hours only drilling depth 3-5 rice simultaneously.Therefore, the existing method of hole deviation that prevents urgently is improved.

Summary of the invention

The purpose of this utility model be in order to provide a kind of structure simple, be easy to processing, the anti-bending remarkably productive anti-bending drilling tool of half period self-correction, fundamentally solve and carry out holing when earth drilling is constructed flexible problem, compared with the existing method preventing hole deviation, its principle is ingenious, practical, anti-bending effective, drilling efficiency is high, does not affect traditional construction technology and drilling tool processing technology simultaneously.

The technical solution of the utility model is:

The anti-bending drilling tool of a kind of half period self-correction, comprise drill bit and outer tube, it is characterized in that: described outer tube is by upper, lower basket composition, described upper basket upper end is connected with eccentric part, on the hemicycle side face of described upper eccentric part, even welding-on has eccentric body on rectangular alloy, on described, lower eccentric part is connected with between lower basket, on the hemicycle side face of described lower eccentric part, even welding-on has the reverse eccentric body of rectangular alloy, be furnished with two semicircle side face differences 180 degree of eccentric body and the reverse eccentric body of alloy on alloy respectively, described drill bit is off-balance bit, be connected to lower basket lower end, the highest eccentric point of described off-balance bit and the highest eccentric point of upper eccentric part are positioned on the same bus I of drilling tool, the highest eccentric point of described lower eccentric part is positioned at differing on the bus II at 180 degree of angles with bus I of drilling tool.

The above-mentioned anti-bending drilling tool of half period self-correction, the maximum radius R of described off-balance bit and the highest eccentric point of upper and lower eccentric part to tool axis apart from equal, the absolute value H of the offset of described upper and lower eccentric part is equal, and boring aperture D=2H+d=2R, wherein, d is upper and lower basket external diameter.

The above-mentioned anti-bending drilling tool of half period self-correction, described off-balance bit forms at the eccentric grinding body of support rigid body end by supporting rigid body and sintering.

The above-mentioned anti-bending drilling tool of half period self-correction, described upper eccentric part is threaded with adopting respectively between upper basket, between lower eccentric part with upper and lower basket, between off-balance bit with lower basket.

The beneficial effects of the utility model are:

1, under normal circumstances, when boring does not bend and linearly creeps into, drilling tool is only under pressure and torsional interaction, drilling tool rotates centered by own axes, drill bit normally creeps into downwards, and when affecting when boring slightly bends (also can claim critical bends) by rock stratum etc. in drilling process, drilling tool is in rotating a circle, it is stressed is different, therefore and be divided into upper half and lower half, when upper half as shown in Figure 5, the eccentric peak of the reverse eccentric body of alloy of lower eccentric part is fulcrum G, withstand on the hole wall of curved drilling, on the alloy of upper eccentric part, the eccentric peak of eccentric body contacts with the hole wall of tossing about and is subject to the directed force F 1 from this hole wall of tossing about, now drilling tool is equivalent to a lever, F1 is the power of lever, off-balance bit can produce and the rightabout directed force F 2 of F1 hole wall, eccentric peak due to off-balance bit is also in the reverse side of hole deviation, pretending firmly F2 acts on the reverse rock in hole deviation direction, fractured rock under the effect of removing material, thus auto modification boring is bending, when drilling tool rotary forwards lower half to, as shown in Figure 6, the eccentric peak of lower eccentric part forwards the room of hole deviation to, loses point action, and the eccentric peak of upper eccentric part also forwards the room of hole deviation to, the directed force F 1 of hole wall to upper eccentric part disappears, and the eccentric peak of off-balance bit just forwards hole deviation direction to, is also in room, it disappears to the directed force F 2 of rock, therefore, this half cycle, not to hole deviation generation effect, only has the downward fractured rock of end labial surface of off-balance bit.Based on the above analysis of causes, the form of structure of drilling tool makes its continuous hole deviation trend revised rock stratum reason and cause, and balance rock stratum reason is applied to bit walk power, keeps boring linear state, does not bend, anti-bending remarkably productive;

2, due to the offset effect of off-balance bit, form the maximum gauge that boring aperture is greater than off-balance bit, therefore there is certain travelling space in off-balance bit in boring, instead of the bearing of trend of drill bit is controlled completely by rock, along the bit course walking that the rule of rock stratum active force is determined, but allowed off-balance bit have can to change the space of bearing of trend, it is anti-bending to be more conducive to boring;

3, due in drilling process drilling tool itself there is the anti-bending function of auto modification, therefore significantly improve drilling quality and drilling efficiency, avoid drilling rod greatly and to fracture or hole the economic loss of scrapping and bringing.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 be in Fig. 1 A-A to sectional drawing;

Fig. 3 be in Fig. 1 B-B to sectional drawing;

Fig. 4 is the right view of Fig. 1;

Fig. 5 is the schematic diagram that the utility model carries out upper half correction in curved drilling;

Fig. 6 is the schematic diagram that the utility model carries out lower half correction in curved drilling.

In figure, sequence number illustrates: eccentric on eccentric part, 2-in-1 gold on 1, basket on 3,4 times eccentric parts, 5 times baskets, 6 support rigid body, 7 eccentric grinding bodies, the reverse eccentric bodies of 8 alloy.

Detailed description of the invention

As Figure 1-4, the anti-bending drilling tool of this half period self-correction, comprise drill bit and outer tube, described outer tube is by upper, lower basket 3, 5 compositions, described upper basket 3 upper end is connected with eccentric part 1, on the hemicycle side face of described upper eccentric part 1, even welding-on has eccentric body 2 on rectangular alloy, on described, lower basket 3, lower eccentric part 4 is connected with between 5, on the hemicycle side face of described lower eccentric part 4, even welding-on has the reverse eccentric body 8 of rectangular alloy, be furnished with two semicircle side face differences 180 degree of eccentric body 2 and the reverse eccentric body 8 of alloy on alloy respectively, described drill bit is off-balance bit, be connected to lower basket 5 lower end, form at the eccentric grinding body 7 of support rigid body 6 end by supporting rigid body 6 and sintering, the highest eccentric point of described off-balance bit and the highest eccentric point of upper eccentric part 1 are positioned on the same bus I of drilling tool, the highest eccentric point of described lower eccentric part 4 is positioned at differing on the bus II at 180 degree of angles with bus I of drilling tool.The maximum radius R of described off-balance bit and the highest eccentric point of upper and lower eccentric part 1,4 are to drilling tool distance of shaft centers from equal, the absolute value H of the offset of described upper and lower eccentric part 1,4 is equal, and boring aperture D=2H+d=2R, wherein, d is upper and lower basket external diameter.Between described upper eccentric part 1 with upper basket 3, between lower eccentric part 4 with upper and lower basket 3,5, the support rigid body 6 of off-balance bit is threaded with adopting respectively between lower basket 5, easy to assembly.

In the present embodiment, the maximum radius R of off-balance bit is 38.5mm, least radius r is 37.5mm, eccentric distance e is 1mm, drilling diameter (boring aperture D) is 38.5 × 2=77mm, boring aperture D 1mm larger than off-balance bit diameter, and so just meeting off-balance bit will have certain travelling space in boring, to the intrinsic physical characteristic overcoming rock stratum, retain the gap of drill bit break-in.The diameter d of upper and lower basket 3,5 is 73mm, with basket axis for benchmark, the maximum eccentricity amount H of upper eccentric part 1 is 2mm, with the distance of tool axis is: 73 ÷ 2+2=38.5mm, in like manner descends the maximum eccentric point of eccentric part 4 and the distance of tool axis to be also 38.5mm.

Claims

1. the anti-bending drilling tool of half period self-correction, comprise drill bit and outer tube, it is characterized in that: described outer tube is by upper, lower basket composition, described upper basket upper end is connected with eccentric part, on the hemicycle side face of described upper eccentric part, even welding-on has eccentric body on rectangular alloy, on described, lower eccentric part is connected with between lower basket, on the hemicycle side face of described lower eccentric part, even welding-on has the reverse eccentric body of rectangular alloy, be furnished with two semicircle side face differences 180 degree of eccentric body and the reverse eccentric body of alloy on alloy respectively, described drill bit is off-balance bit, be connected to lower basket lower end, the highest eccentric point of described off-balance bit and the highest eccentric point of upper eccentric part are positioned on the same bus I of drilling tool, the highest eccentric point of described lower eccentric part is positioned at differing on the bus II at 180 degree of angles with bus I of drilling tool.

2. the anti-bending drilling tool of half period self-correction according to claim 1, it is characterized in that: the maximum radius R of described off-balance bit and the highest eccentric point of upper and lower eccentric part to tool axis apart from equal, the absolute value H of the offset of described upper and lower eccentric part is equal, and boring aperture D=2H+d=2R, wherein, d is upper and lower basket external diameter.

3. the anti-bending drilling tool of half period self-correction according to claim 1, is characterized in that: described off-balance bit forms at the eccentric grinding body of support rigid body end by supporting rigid body and sintering.

4. the anti-bending drilling tool of half period self-correction according to claim 1, is characterized in that: described upper eccentric part is threaded with adopting respectively between upper basket, between lower eccentric part with upper and lower basket, between off-balance bit with lower basket.