CN209179703U

CN209179703U - A kind of aperture centralizer

Info

Publication number: CN209179703U
Application number: CN201821655051.8U
Authority: CN
Inventors: 王英坡; 张广宇; 王庆学; 侯常文; 李恩宁; 李恩涛
Original assignee: Beijing Zhongding Shengyuan Mine Engineering Co Ltd; Beijing Branch Of China Coal Geology Group Co Ltd
Current assignee: Beijing Zhongding Shengyuan Mine Engineering Co Ltd; Beijing Branch Of China Coal Geology Group Co Ltd
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2019-07-30
Anticipated expiration: 2028-10-12

Abstract

The utility model relates to a kind of aperture centralizers, are mounted on drilling machine bottom safety platform, including pedestal, the big bearing in outside, 2 half inner sleeves, multiple embed small bearing and the pin shaft equal with small number of bearings is embedded；Pedestal is fixed on drilling machine bottom safety platform by 4 bolts, each embeds small bearing and is mounted in half inner sleeve by a pin shaft, and half inner sleeve encircles round drill rod, and half inner sleeve is fixed on the inner ring of the big bearing in outside, and the outer ring of the big bearing in outside is fixed on the base.The utility model is by increasing rotation direction and drilling rod advance or the consistent small bearing of direction of retreat, to by drilling rod advance or retreat when with the contact friction between bearing inner race, become pivoting friction, to effectively reduce the abrasion of bearing and drilling rod, reduce the gap between drilling rod and bearing inner race, the control precision of drilling direction ensure that.

Description

A kind of aperture centralizer

Technical field

The utility model relates to drilling well construction field more particularly to a kind of aperture centralizers.

Background technique

Mine shaft rising boring method need to first construct guide hole, and guide hole precision often decides the quality of inverse Construction, is even constructed into It loses.Guide hole construction precision is thus improved, conclusive effect is played to the application of mine shaft rising boring method.

Aperture refers to the drilling incipient stage, and drill bit starts to pierce rock, after entering rock a distance to drill bit This stage usually creeps into 0m to 10m or so.Aperture precision controlling is the key that improve one ring of guide hole precision.Influence aperture The main reason for precision be drilling rod in this stage other than going up and down and rotating, the movement in other directions such as also occur swinging.This reality With it is novel can operative constraint drilling rod, make its swing etc. other directions movement substantially reduce, it will help improve aperture precision.

For vertical well construction, by gravity, drilling rod can be substantially at vertical state, thereby may be ensured that aperture is applied Working medium amount.But in slope construction, when guide hole starts construction, drilling rod is in vacant state close to the place for entering hole point rock, This just causes drilling rod will appear to freely swing, to influence aperture precision.

Conventional method solves the problems, such as this, is fixed in annular mount using multiple bearings, and bearing inner race contact is bored Bar, to buttress drilling rod, the shortcomings that this method is that bearing can only be rotated with drilling rod, while there are one between bearing and drilling rod Gap is determined to guarantee the back-and-forth motion of drilling rod, when drilling rod is moved forward and backward, sliding friction can directly be occurred with bearing inner race, be led to axis It is fast to hold inner ring abrasion, abrasion post gap further increases, and gap, which increases, will affect righting precision, wants so that aperture precision be not achieved It asks.

Another righting method is the righting drilling rod for making the finishing of an outer surface, installs the righting of pair of sliding semicircle Device.Direct friction contacts between centralizer and righting drilling rod, the friction including rotating and being moved forward and backward generation, is lubricated by smearing Oil is lubricated.A kind of relatively upper mode rate of wear of both sides' rate of wear of this working method faster, in this process can The frictional centralizer interior diameter of rapid expansion and righting drilling rod overall diameter, after there is certain interval, it is necessary to replacement wherein one Kind, it can guarantee construction quality precision.

Utility model content

The purpose of this utility model is that in place of solving the above deficiencies in the existing technologies.

To achieve the above object, the utility model provides a kind of aperture centralizer, is mounted on drilling machine bottom safety platform, packet It includes pedestal, the big bearing in outside, 2 half inner sleeves, multiple embed small bearing and the pin shaft equal with small number of bearings is embedded；Bottom Seat is fixed on drilling machine bottom safety platform by 4 bolts, each embeds small bearing and is mounted in half inner sleeve by a pin shaft, Half inner sleeve encircles round drill rod, and half inner sleeve is fixed on the inner ring of the big bearing in outside, and the outer ring of the big bearing in outside is fixed on the base.

Preferably, the material of pedestal is impure less high-quality steel, it is desirable that it is wear-resisting, it deforms small.

Preferably, the material of half inner sleeve is iron-carbon alloy steel, the same bearing material of material.

Preferably, the quantity for embedding small bearing is no less than 6.

The utility model is by increasing rotation direction and drilling rod advance or the consistent small bearing of direction of retreat, to will bore Bar advance or retreat when bearing inner race between sliding friction, become pivoting friction, thus effectively reduce bearing and The abrasion of drilling rod reduces gap between drilling rod and bearing inner race, ensure that the control precision of drilling direction.

Detailed description of the invention

Fig. 1 is a kind of top view of aperture centralizer provided by the embodiment of the utility model；

Fig. 2 is the cross-sectional view of the I-I of Fig. 1；

Fig. 3 is a kind of side view of aperture centralizer provided by the embodiment of the utility model；

Fig. 4 is the cross-sectional view of the II-II of Fig. 3；

Fig. 5 is a kind of side view of inner sleeve provided by the embodiment of the utility model；

Fig. 6 is a kind of top view of inner sleeve provided by the embodiment of the utility model；

Fig. 7 is the cross-sectional view of the III-III of Fig. 5.

Specific embodiment

With reference to the accompanying drawings and examples, the technical solution of the utility model is described in further detail.

Such as Fig. 1-7, the utility model provides a kind of aperture centralizer, including pedestal 1, outside 2,2 half inner sleeves of big bearing 3, multiple to embed small bearing 5 and multiple pin shafts 4.Pedestal 1 is provided with 4 bolts hole 7, is fixed on drilling machine bottom by 4 bolts Security platform each embeds small bearing 5 and is mounted in half inner sleeve 3 by a pin shaft 4, and two and half inner sleeves 3 encircle round brill Bar, half inner sleeve 3 are fixed on the inner ring of the big bearing 2 in outside, and the outer ring of the big bearing 2 in outside is fixed on pedestal 1.

In one example, the material of pedestal 1 is impure less high-quality steel, it is desirable that it is wear-resisting, it deforms small.

In one example, the material of half inner sleeve 3 is iron-carbon alloy steel, the same bearing material of material.

It should be appreciated that the quantity for embedding small bearing 5 can change, true according to the diameter of drilling rod according to design requirement Fixed, diameter is bigger, and quantity is more, and general no less than 6.

It when work, drilling rod and embeds small bearing 5 and is in contact, when drilling rod advances or retreats, embed small bearing 5 and rotate；It bores When bar rotates, drive embeds small bearing 5, half inner sleeve 3, and the big bearing 2 in outside rotates together, and pedestal 1 is motionless.Drilling rod simultaneously go up and down and When rotation, by embedding the big bearing 2 of small bearing 5 and outside for compound motion, it is changed into two groups of rotations, to reduce friction, and about Beam lives drilling rod, prevents it from movable to other directions, to achieve the effect that righting.

Embed small bearing rotation direction and drilling rod advance perhaps retreat direction it is consistent thus by drilling rod advance or after Contact friction when moving back between the big bearing inner race in outside, becomes pivoting friction, to effectively reduce bearing and drilling rod It wears, reduce gap between drilling rod and bearing inner race, ensure that drilling direction.

Specific implementation is as follows:

In order to reduce the gap of drilling rod and centralizer and facilitate installation, using the design of half inner sleeve 3, drilling rod has been encircled Come.It embeds small bearing 5 to contact with drilling rod, realizing becomes pivoting friction for the sliding friction that drilling rod is moved forward and backward, and embeds small bearing 5 By pin shaft 4, inner sleeve 3 is connected, inner sleeve 3 brings drilling rod rotary motion to outside 2 inner ring of big bearing, thus when drilling rod is rotated Contact friction, be changed into pivoting friction, to reduce friction, reduce abrasion.The outer ring of the big bearing 2 in outside, is fixed on pedestal On.After pedestal installs, the centre bore of the utility model can be made, it is coaxial with power head centre bore, to realize righting effect.

The radial friction by drilling rod for embedding small bearing 5, is converted to pivoting friction.Embed small bearing 5 and the big bearing 2 in outside Combination the friction of drilling rod may be implemented all be converted to pivoting friction, to effectively reduce the abrasion of drilling rod outer diameter, improve To the precision of drilling rod righting.And the required precision outside drilling rod is significantly reduced, to guarantee construction quality.

Above specific embodiment has carried out further the purpose of this utility model, technical scheme and beneficial effects It is described in detail, it should be understood that the above is only the specific embodiments of the utility model, is not used to limit originally practical Novel protection scope, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, It should be included within the scope of protection of this utility model.

Claims

1. a kind of aperture centralizer is mounted on drilling machine bottom safety platform, which is characterized in that including pedestal, the big bearing in outside, 2 A half inner sleeve multiple embeds small bearing and the pin shaft equal with small number of bearings is embedded；

The pedestal is fixed on drilling machine bottom safety platform by 4 bolts, and the outer ring of the big bearing in outside is fixed on pedestal Interior, half inner sleeve is fixed on the inner ring of the big bearing in outside, and half inner sleeve encircles round drill rod, each embeds small bearing and pass through One pin shaft is mounted in half inner sleeve.

2. centralizer according to claim 1, which is characterized in that the material of the pedestal is steel.

3. centralizer according to claim 1, which is characterized in that the material of half inner sleeve is iron-carbon alloy steel.

4. centralizer according to claim 1, which is characterized in that the quantity for embedding small bearing be more than or equal to 6.