CN211201801U

CN211201801U - Drilling falling block crushing device

Info

Publication number: CN211201801U
Application number: CN201921119465.3U
Authority: CN
Inventors: 肖睿; 左洪国; 王波
Original assignee: CHENGDU BEST DIAMOND BIT CO LTD
Current assignee: CHENGDU BEST DIAMOND BIT CO LTD
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-08-07
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a drilling falls piece breaker, including rotatory body, the one end or the both ends of rotatory body are equipped with the joint, the middle section periphery of rotatory body is equipped with a plurality of blades that distribute along the circumferencial direction, the outside edge of blade is equipped with a plurality of PDC cutting teeth, the outside surface of blade is equipped with a plurality of carbide posts, adjacent two form the passageway recess between the blade. The drilling falls piece breaker main action and falls the piece and effectively breaks, the grinding and get rid of to the drilling, falls the piece and in time handles to the drilling, avoids the drilling to fall the piece and probably leads to hold in the palm pressure, block up the brill, the annular space holds back unfavorable consequences such as stifled, still has simultaneously and maintains and function such as two-way reaming along with boring centralizer, the wall of a well, whole device simple structure is reliable, can be in multiple occasion wide application.

Description

Drilling falling block crushing device

Technical Field

The utility model relates to an auxiliary device for the well drilling especially relates to one kind and can fall the piece with the well drilling and carry out effective broken well drilling and fall a breaker.

Background

In the oil and gas field exploitation drilling operation, the falling of well wall clods and wellhead falling objects are common engineering accidents, and the generated falling clods of the well drilling can cause complex working conditions such as pressure supporting, drill sticking, annulus blocking and the like. Currently, there is no effective way to specifically solve the problem of drilling dropping.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can fall the well drilling that the piece carries out effective breakage and fall a breaker under the drilling rod drives in order to solve above-mentioned problem with the well drilling.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a drilling falls a breaker, includes rotatory body, the one end or both ends of rotatory body are equipped with the joint, the middle section periphery of rotatory body is equipped with a plurality of blades that distribute along the circumferencial direction, the outside edge of blade is equipped with a plurality of PDC cutting teeth, the outside surface of blade is equipped with a plurality of carbide posts, adjacent two form the passageway recess between the blade.

In the structure, the rotating body is a base body of the whole device, and joints which are integrally formed or welded are processed at two ends or one end of the rotating body, are used for being connected with a drill rod and rotate under the driving of the drill rod; the blade and the rotating body are integrally formed or welded and connected and are used for mounting PDC cutting teeth and hard alloy columns to realize the functions of crushing and grinding; the PDC cutting teeth are polycrystalline diamond compact cutting teeth, the hard alloy column is a cylinder processed by hard alloy, and the PDC cutting teeth and the hard alloy column are common parts of a drilling bit and are not described again; the channel groove is formed by a gap between two adjacent blades, the width of each blade and the width of the channel groove are determined according to actual requirements, for example, the channel groove is used for allowing chips to pass through according to the outer diameter of a drilled falling block, the corresponding crushing effect of the drilled falling block, the outer diameter of the chips formed after crushing and other factors.

Preferably, the PDC cutting teeth are fixed in tooth holes in the outer side edges of the blades by brazing, and the cemented carbide posts are fixed in cemented carbide post holes in the outer side surfaces of the blades by interference fit and then formed by gauge protection and grinding.

In order to improve the crushing and grinding effects and avoid drill jamming in the crushing process, the outer side surfaces of the blades are arc surfaces with convex middles, and the outer diameter of the middle section of the crushing device formed by the blades is larger than the outer diameters of the two ends of the crushing device. The structure also has the function of righting the drilling tool, the outer surfaces of the middle sections of the blades can be in contact with the well wall, the two ends of the middle sections of the blades cannot be in contact with the well wall, the righting function is achieved on the premise that the crushing function is not influenced, and the righting of the drilling tool is achieved under the condition that no special righting device is arranged.

Preferably, the number of the blades is eight, and the blades are uniformly distributed on the periphery of the middle section of the rotating body.

The beneficial effects of the utility model reside in that:

the drilling falls piece breaker main action and falls the piece and effectively breaks, the grinding and gets rid of to the drilling, falls the piece and in time handles to the drilling, avoids the drilling to fall the support that the piece probably leads to and presses, the card bores, the annular space holds back unfavorable consequences such as stifled, still has other following functions simultaneously: the drilling tool is connected into a drilling string according to the design, is equivalent to a centralizer while drilling under the normal condition, can reduce the contact area between the drilling string and the well wall, reduces friction resistance, can carry out operations such as well wall trimming and bidirectional reaming when passing through irregular wells, and keeps the well wall smooth and round. The whole device has simple and reliable structure and can be widely applied to various occasions.

Drawings

Fig. 1 is a schematic structural view of a drilling falling block crushing device according to the present invention;

fig. 2 is a cross-sectional view a-a of fig. 1, on a larger scale than fig. 1.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2, the drilling block-falling crushing device of the present invention comprises a rotating body 2, two ends of the rotating body 2 are respectively provided with a joint 1 (in some cases, only one end of the rotating body is provided with the joint 1, which is not specifically discussed here), eight blades 3 uniformly distributed along the circumferential direction are arranged on the periphery of the middle section of the rotating body 2, the outer side surfaces of the blades 3 are arc surfaces protruding outwards in the middle, the outer diameter of the middle section of the crushing device formed by the eight blades 3 is larger than the outer diameters of the two ends of the crushing device, the outer side edges of the blades 3 are provided with a plurality of PDC cutting teeth 5, the PDC cutting teeth 5 are fixed in tooth holes on the outer side edges of the blades 3 by brazing, the outer side surfaces of the blades 3 are provided with a plurality of hard alloy columns 6, the hard alloy columns 6 are fixed in the hard alloy column, and then gauge-protecting grinding is carried out to form a channel groove 4 between two adjacent blades 3.

As shown in fig. 1 and 2, when in use, the drilling block falling crushing device of the utility model is connected with a drill rod through a joint 1, generally connected below a centralizer on the drill rod, or the centralizer is not needed, and the device is used for replacing the centralizer; when the well wall soil block falls off or the well mouth falls off, the rotary body 2 drives the PDC cutting teeth 5 and the hard alloy columns 6 on the blades 3 to extrude, crush and grind the falls under the driving of the drill rod, and the chippings are discharged out of the ground through the channel groove 4 while drilling (the drilling fluid can be discharged out of the ground), so that adverse effects such as pressure supporting, drill clamping, annulus blocking and the like possibly caused by the falling of the drilling block are avoided; when normally drilling, the drilling falls a breaker and can right the drilling tool as following the drill centralizer, reduces to rub and hinders, alleviates the support and presses, can repair the wall of a well simultaneously, keeps pit shaft rule, rounding.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims

1. The utility model provides a well drilling breaker that falls piece, includes rotating body, rotating body's one end or both ends are equipped with joint, its characterized in that: the periphery of the middle section of the rotating body is provided with a plurality of blades distributed along the circumferential direction, the outer edges of the blades are provided with a plurality of PDC cutting teeth, the outer side surfaces of the blades are provided with a plurality of hard alloy columns, and a channel groove is formed between every two adjacent blades; the outer side surfaces of the blades are arc surfaces with convex middles, and the outer diameter of the middle section of the crushing device formed by the blades is larger than the outer diameters of the two ends of the crushing device.

2. A drill cuttings breaker apparatus according to claim 1 wherein: the PDC cutting teeth are fixed in tooth holes in the outer side edges of the blades through brazing, the hard alloy columns are fixed in the hard alloy column holes in the outer side surfaces of the blades through interference fit, and then the hard alloy columns are formed through diameter-keeping grinding.

3. A drill cuttings breaker apparatus according to claim 1 or 2 wherein: the blades are eight and are uniformly distributed on the periphery of the middle section of the rotating body.