CN203783467U - Oil well drill bit - Google Patents

Abstract

The utility model discloses anoil well drill bit, belongs to the field of petroleummachineryaccessories, and mainly solves the problem that thedeviation during drilling is easily caused by the more complex rock and soil layer composition in an existingoil well drilling process. The drill bit structurally comprises a cable, a motor, a coupling, a guiding drill bit, guiding dovetails and an advancing drill bit, wherein the cable is connected with the motor, an output end of the motor is connected with the tail end of the guiding drill bit through the coupling, and the front end of the guiding drill bit is connected with the tail end of the advancing drill bit; a cylindrical bulge is arranged at the tail end of the guiding drill bit, the annular guiding dovetails are arranged on the cylindrical surface of the guiding drill bit, three circles of guiding dovetails are distributed axially, and the front end of the guiding drill bit adopts a conical structure; the guiding dovetails and the guiding drill bit adopt an integrated structural design; the tail end of the advancing drill bit is connected with thefront end of the guiding drill bit in a welding manner. During usage of theoil well drill bit, the guiding drill bit structure is added, so that the drilling process is more accurate and better in linearity.

Description

A kind of drill for oil well

Technical field

The utility model relates to a kind of drill for oil well, belongs to petroleum machinery parts field.

Background technology

First oil drilling need to carry out drillng operation on the earth's surface on oil reservoir, needs to use drill for oil well in process, and it mainly contains pyriform milling miser, bottom three gear wheels, single-cone rotary drill bit, the sharp-eyed drill bit of neck, Rhizoma Sparganii shape drill bit etc.In drilling process, drill bit directly contacts with rock-soil layer, by revolving force, the geotechnical structure on earth's surface is carried out to fragmentation, because rock-soil layer in drilling process forms more complicated, soft differing, thereby easily cause deflection problem in drilling process, therefore design a guide function that has, can improve probing precision and linear drill bit, seem very valuable.

Utility model content

The utility model forms more complicated for rock-soil layer in current oil well drilling process, easily causes the problem of being partial in drilling process, has designed a kind of drill for oil well.

The technical scheme in the invention for solving the technical problem is:

This drill for oil well comprises cable, motor, shaft coupling, starter, guiding dovetail, drill bit advances; Cable connects motor, and motor output end is connected with starter tail end by shaft coupling, and starter front end is connected with the drill bit tail end that advances.

Described starter tail end has cylindrical protrusions, has annular guiding dovetail on the starter face of cylinder, three circles that distribute vertically, and starter front end is conical structure.

Described guiding dovetail and starter are integral type structure design.

The described drill bit tail end that advances is that welding manner is connected with starter front end.

The utility model has the following advantages:

1. the utility model is novel unique, in use procedure, owing to having increased starter structure, makes in drilling process more precisely, and linearity is better.

2. material is cheap, and cost of manufacture is low, and application is wide.

Brief description of the drawings

Fig. 1 is the utility model overall structure figure.

In figure: 1 cable, 2 motor, 3 shaft couplings, 4 starters, 5 guiding dovetails, 6 advance drill bit, 7 soil.

Detailed description of the invention

As shown in Figure 1: a kind of drill for oil well, its structure comprises: cable, motor, shaft coupling, starter, guiding dovetail, drill bit advances; Cable connects motor, and motor output end is connected with starter tail end by shaft coupling, and starter front end is connected with the drill bit tail end that advances; Starter tail end has cylindrical protrusions, has annular guiding dovetail on the starter face of cylinder, three circles that distribute vertically, and starter front end is conical structure; Guiding dovetail and starter are integral type structure design; The drill bit tail end that advances is that welding manner is connected with starter front end.

When use, this drill bit is assembled, the end that is fixed on conventional probing bar, starts power supply, in oil well drilling process in drilling process, by the effect of starter and guiding dovetail, the accuracy that can realize oil well probing ensures the linearity of the oil well of probing simultaneously.

The above, be only detailed description of the invention of the present utility model, and in the scope that those of ordinary skill in the art disclose at the utility model, the variation that can expect easily, within all should being encompassed in the protection domain of utility model.

Claims (4)

1. a drill for oil well, structure comprises: cable, motor, shaft coupling, starter, guiding dovetail, drill bit advances; It is characterized in that: cable connects motor, and motor output end is connected with starter tail end by shaft coupling, and starter front end is connected with the drill bit tail end that advances.

2. a kind of drill for oil well according to claim 1, is characterized in that: starter tail end has cylindrical protrusions, has annular guiding dovetail on the starter face of cylinder, three circles that distribute vertically, and starter front end is conical structure.

3. a kind of drill for oil well according to claim 1, is characterized in that: guiding dovetail and starter are integral type structure design.

4. a kind of drill for oil well according to claim 1, is characterized in that: the drill bit tail end that advances is that welding manner is connected with starter front end.