CN222141160U - Full-hole continuous coring directional drilling diameter-crossing reaming deviation-preventing tower type device - Google Patents

Abstract

The utility model relates to a full-hole continuous coring directional drilling diameter-crossing reaming anti-deflection tower type device. When the drilling of the existing full-hole continuous coring directional horizontal hole meets a complex stratum in the drilling process, the problems of high hole reaming difficulty, deviation of a drilling tool in the hole reaming process and low hole reaming efficiency exist. The utility model comprises a primary reaming bit, a secondary reaming bit and an anti-deflection guide pipe, wherein the primary reaming bit is fixedly connected with the secondary reaming bit, the secondary reaming bit is fixedly connected with the anti-deflection guide pipe, the anti-deflection guide pipe is positioned at the front end of the whole device, the connecting central shafts of the primary reaming bit, the secondary reaming bit and the anti-deflection guide pipe are positioned on the same straight line, and a plurality of bit water gaps are formed in the front ends of the primary reaming bit and the secondary reaming bit. When the utility model drills into complex stratum, the reaming difficulty is reduced, the deviation of the drilling tool in the reaming process is avoided, and the reaming efficiency is improved.

Description

Full-hole continuous coring directional drilling diameter-crossing reaming deviation-preventing tower type device

Technical Field

The utility model relates to the technical field of engineering geological exploration, in particular to a full-hole continuous coring directional drilling diameter-crossing reaming anti-deflection tower type device.

Background

At present, complex stratum such as block falling, collapse and necking can be frequently drilled in the process of drilling a directional horizontal hole in engineering geological coring, and burning, rock powder adsorption and drilling blocking and the like can be frequently generated in the process of seriously losing a hole, so that the frequent occurrence of hole accidents can be avoided, a large-caliber drill bit is often used for reaming, then a sleeve is put into the sleeve to block an abnormal zone, smooth crossing of the stratum abnormal zone is ensured, and engineering exploration is completed. However, in the current horizontal hole drilling process, due to the problem of horizontal stress to a drill rod and uneven hardness of stratum, serious hole accidents such as eccentric drilling and deviated track often occur under the influence of unbalanced drilling machine pressure, torque and rotating speed and the like. On the other hand, the conventional reaming device is difficult to ream to a required large caliber at one time, and is one-level reaming, or is firstly enlarged to the previous level, after the problem occurs again, the sleeve is pulled out for reaming, and the repeated reaming and the drilling tool extraction can induce the instability of the hole wall, so that the secondary hole accidents are caused, the auxiliary time is greatly increased, and the production progress is seriously delayed.

In summary, when the drilling of the existing full-hole continuous coring directional horizontal hole meets a complex stratum in the drilling process, the problems of large reaming difficulty and low reaming efficiency of the drilling tool in the reaming process exist.

Disclosure of Invention

The utility model aims to provide a full-hole continuous coring directional drilling diameter-crossing reaming deviation-preventing tower-type device, which at least solves the problems of high reaming difficulty and low drilling tool deviation and reaming efficiency in the reaming process when a complex stratum is encountered during drilling of the existing full-hole continuous coring directional horizontal hole.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The full-hole continuous coring directional drilling diameter-crossing reaming anti-deflection tower type device comprises a primary reaming bit, a secondary reaming bit and an anti-deflection guide pipe;

The primary reaming bit is fixedly connected with the secondary reaming bit, the secondary reaming bit is fixedly connected with the deviation preventing guide pipe, the deviation preventing guide pipe is positioned at the front end of the whole device, and the connecting central shafts of the primary reaming bit, the secondary reaming bit and the deviation preventing guide pipe are positioned on the same straight line;

The front ends of the primary reamer bit and the secondary reamer bit are provided with a plurality of bit water gaps.

Further, the diameter of the primary reamer bit is 125-135mm.

Further, the diameter of the secondary reaming bit is 105-115mm.

Further, the diameter of the anti-deflection guide tube is 90-100mm.

Further, the tail parts of the primary reamer bit and the secondary reamer bit are connected through welding.

Further, the distance between the primary reamer bit and the secondary reamer bit is 5-10cm.

Further, the length of the anti-deviation guide tube is 25-30 cm.

Further, the middle end of the deflection preventing guide tube is connected with the secondary reaming bit through welding.

Further, the distance between the anti-deflection guide pipe and the secondary reaming bit is 10-15cm.

Furthermore, the water gap of the drill bit is square or U-shaped.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model has strong applicability, not only has the functions of the original equipment, but also can carry out one-time out-of-order reaming according to the actual production needs, reduces the procedures of frequent drilling and down-drilling and the like, reduces the reaming difficulty, and avoids the hole accidents such as hole wall instability and the like caused by the reaming process;

2. The utility model is suitable for reaming of the full-hole continuous coring directional horizontal drill, and the deviation-preventing guide pipe is added at the top end of the drill bit, so that serious accidents such as track deviation and the like caused by unbalanced drilling pressure and torque, alternating soft rock and hard rock and the like in the reaming process can be avoided;

3. The utility model has simple operation and strong universality, has lower requirements on practical operators and can be widely popularized in engineering drilling units;

4. The utility model has simple manufacture and low cost, comprises a primary reaming bit, a secondary reaming bit and an anti-deflection guide pipe, is extremely common in a unit, is convenient for market purchase, can keep the center points of the three parts positioned in a straight line, and is easy to manufacture in the operation site of a drilling machine set;

5. the utility model has high reaming efficiency, and in the reaming process, the rock mass cut at each stage is thinner, the required torque is smaller, and the rotating speed and the drilling pressure can be improved under the same power output condition, so that the rock mass cutting efficiency and the reaming efficiency are improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of the present embodiment;

the marks in the figure are as follows:

1-a first-stage reaming bit, 2-a second-stage reaming bit, 3-an anti-deflection guide pipe and 4-a bit water gap.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Examples:

As shown in fig. 1, the utility model provides a full-hole continuous coring directional drilling diameter-crossing reaming deviation-preventing tower-type device, which takes an existing drilling bit as a guiding device, and adds a secondary diamond grinding bit outside the drilling bit to form a multi-stage tower-type reaming deviation-preventing device, and the device comprises a primary reaming bit 1, a secondary reaming bit 2 and a deviation-preventing guiding pipe 3.

The primary reaming bit 1 is fixedly connected with the secondary reaming bit 2, the secondary reaming bit 2 is fixedly connected with the deviation preventing guide pipe 3, the deviation preventing guide pipe 3 is positioned at the front end of the whole device, and the connecting central shafts of the primary reaming bit 1, the secondary reaming bit 2 and the deviation preventing guide pipe 3 are positioned on the same straight line.

The front ends of the primary reaming bit 1 and the secondary reaming bit 2 are provided with a plurality of bit water gaps 4, in the embodiment, the bit water gaps 4 are square, in other embodiments, the bit water gaps 4 can also be U-shaped, and the number and the specification of the bit water gaps 4 meet the flow speed of flushing fluid in a water cross section, so that the purposes of cooling the bit and removing rock powder are achieved.

The diameter of the primary reaming bit 1 is 130mm, the primary reaming bit 1 is the rear end of the whole device, the primary reaming bit 1 is a diamond bit which is suitable for a covering layer and a crushing belt phi 130mm composite bit or is suitable for hard rock, the outer diameter specification of the primary reaming bit 1 can be determined according to a drilling structure, a drilling scheme and practical conditions in other embodiments, the primary reaming bit 1 is connected with the tail part of the secondary reaming bit 2 through welding, the distance between the primary reaming bit 1 and the secondary reaming bit 2 is 5-10cm, and the central axes of the primary reaming bit 1 and the secondary reaming bit 2 are always kept on the same straight line in the welding process, so that the gravity center is ensured to be unchanged.

The secondary reamer bit 2 is located in the middle position of the primary reamer bit 1 and the deviation preventing guide pipe 3 of the small primary, the specification of the secondary reamer bit 2 is a phi 110mm diamond bit according to stratum, the middle position of the deviation preventing tower type is shown, the outer diameter specification of the secondary reamer bit 2 can be determined according to a drilling structure, a drilling scheme and practical conditions in other embodiments, the distance between the cutting edge of the secondary reamer bit 2 and the cutting edge of the primary reamer bit 1 is 5-10cm, and the distance between the cutting edge of the secondary reamer bit 2 and the deviation preventing guide pipe 3 is 10-15cm.

The anti-deflection guide pipe 3 is located at the front end of the whole device, the diameter is 95mm, the whole length is 25-30 cm, the outer diameter specification of the anti-deflection guide pipe 3 can be determined according to a drilling structure, a drilling scheme and practical conditions in other embodiments, the middle end of the anti-deflection guide pipe 3 is connected with the secondary reaming drill bit 2 through welding, the distance between the anti-deflection guide pipe and the secondary reaming drill bit 2 is 10-15cm, and the tail end of the anti-deflection guide pipe 3 is connected with a drill rod through threads.

In the preparation process of the embodiment, each stage of drill bit is welded, and the axes of the 3 parts are on the same straight line, so that the phenomenon that equipment is left in a hole due to deviation and unstable connection in the drilling process is prevented, and a hole accident is formed.

The working principle of this embodiment is as follows:

In the process of directional horizontal hole drilling, if a complex stratum is encountered, the current caliber cannot meet the requirement of casing isolation or accident handling of complex sections, and reaming is needed. Firstly, the tail end of the anti-deviation guide pipe 3 is connected with a drilling tool through screw threads, positive circulation drilling is started from an orifice or a preset caliber, meanwhile, a water pump is started, flushing fluid starts to flow into the forefront end of the anti-deviation guide pipe 3 from the drilling tool, when flushing fluid encounters a face, the flushing fluid flows back to the front end of the secondary reaming bit 2, at the moment, the secondary reaming bit 2 grinds rock mass, flushing fluid carries ground rock powder to the primary reaming bit 1 along an annular gap through the bit water gap 4, at the moment, the primary reaming bit 1 also cuts the rock mass, and the formed rock powder is carried out of the hole along the annular gap through the bit water gap 4, so that reaming is completed. The anti-deviation guide pipe 3 has the same size as the aperture in the reaming process, plays a guiding role, ensures that the existing hole is forwards moved in the reaming process, and simultaneously collects and processes residual rock in the hole. After the reaming is completed, the large-caliber drilling tool is used as a casing pipe to be put into the hole, and the casing pipe wall protection is completed.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (10)

1. The utility model provides a full hole continuous coring directional drilling hole diameter-enlarging deviation-preventing tower type device, includes one-level reaming bit (1), its characterized in that:

the device also comprises a secondary reaming bit (2) and an anti-deviation guide pipe (3);

The primary reaming bit (1) is fixedly connected with the secondary reaming bit (2), the secondary reaming bit (2) is fixedly connected with the deviation preventing guide pipe (3), the deviation preventing guide pipe (3) is positioned at the front end of the whole device, and the connecting central shafts of the primary reaming bit (1), the secondary reaming bit (2) and the deviation preventing guide pipe (3) are positioned on the same straight line;

The front ends of the primary reaming bit (1) and the secondary reaming bit (2) are provided with a plurality of bit water gaps (4).

2. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The diameter of the primary reaming bit (1) is 125-135mm.

3. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The diameter of the secondary reaming bit (2) is 105-115mm.

4. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

the diameter of the anti-deflection guide tube (3) is 90-100mm.

5. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The tail parts of the primary reaming bit (1) and the secondary reaming bit (2) are connected through welding.

6. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The distance between the primary reamer bit (1) and the secondary reamer bit (2) is 5-10cm.

7. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The length of the anti-deviation guide tube (3) is 25-30 cm.

8. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The middle end of the deviation-preventing guide pipe (3) is connected with the secondary reaming bit (2) through welding.

9. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The distance between the deviation prevention guide pipe (3) and the secondary reaming bit (2) is 10cm to 15cm.

10. A full bore continuous coring directional drilling over-diameter reaming anti-deflection tower device as set forth in claim 1, wherein:

The drill bit water gap (4) is square or U-shaped.