CN202970487U

CN202970487U - Long gauge bidirectional-drilling PDC drill bit

Info

Publication number: CN202970487U
Application number: CN 201220068555
Authority: CN
Inventors: 袁淑英; 陈广岭
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-26
Filing date: 2012-02-26
Publication date: 2013-06-05
Anticipated expiration: 2022-02-26

Abstract

A long gauge bidirectional-drilling PDC drill bit comprises the following components: a drill bit body, long cutter wings, short cutter wings, nozzles, cutting teeth, back-row teeth, reverse cutting teeth and wearing-resistant diameter-protecting members. The long cutter wings and the short cutter wings are combined on the drill bit body. The nozzles are inserted on the front drill body of each cutter wing. Cutting teeth and back-row teeth are inserted on the lower cutter head part of the cutter wing. Reverse cutting teeth are inserted in the upper part of each cutter wing, namely the upper part of a cutter handle part. The wearing-resistant diameter-protecting members are inserted in an arc surface where the cutter handle of the cutter wing contacts with the well wall. A right-hand helix type facet-diameter protecting part with higher length is formed on the cutter handle part of the cutter wing and the outer cylindrical surface of the drill bit body. Furthermore the spiral line type nozzles are adopted for replacing the common nozzles.

Description

The two-way PDC drill bit that creeps into of a kind of long gauge

Affiliated technical field

The utility model relates to the PDC drill bit that a kind of oil drilling is used, the two-way PDC drill bit that creeps into of especially a kind of long gauge.

Background technology

At present, the PDC drill bit that uses in Process of Oil Well Drilling both at home and abroad, general gauge is all shorter, can not play well the effect of anti-oblique and anti-spiral well; Can't process when running into well slough, undergauge when pulling out of hole; When boring chance conglomerate stratum, drill bit damages and is exceedingly fast, the ability of not passing through fast.

The utility model content

In order to overcome the deficiency of existing PDC drill bit, the utility model provides a kind of long gauge the two-way PDC of creeping into drill bit.

The technical solution of the utility model is: the two-way PDC of the creeping into drill bit of this length gauge comprises bit body, the rimmer knife wing, the short sword wing, nozzle, cutting teeth, wear-resisting gauge body.It is characterized in that: the bottom tool bit part insert of wing cutting teeth and rear toothrow; Top at wing--be the top of shank portion, insert oppositely cutting teeth; The faceted pebble of the shank portion of wing and one section right-hand screw line style of bit body outer cylinder surface formation-gauge part, the gauge part is longer.

In order to improve the stability of drill bit, improve the ability of anti-oblique, anti-spiral well, the gauge of drill bit is long 150-500 millimeter partly, and the pitch of right-hand screw line style faceted pebble is the 200-900 millimeter.

Reduce again the resistance of drill bit for the stability that improves drill bit, bit gauge protection partly is processed into the shape of the slightly little dumbbell of mid diameter.

Reduce again the resistance of drill bit for the stability that improves drill bit, the shank portion of the drill bit rimmer knife wing and the short sword wing-be the bit gauge protection part, can be processed into the short form of gauge part of the long and short wing of gauge part of the rimmer knife wing.

In order to improve the energy of drill bit bottom jet, the removing of more convenient drilling cuttings, on the inwall of two circular arc type nozzles of routine, process the petal-like groove of rotation direction-namely form spiral line type nozzle, replace the plain nozzle of drill bit with the spiral line type nozzle, the spiral line type nozzle can use one or a plurality of.

In order to improve the energy of drill bit bottom jet, the removing of more convenient drilling cuttings, the spiral line type nozzle is the right-hand screw line style.

For the further energy that improves the drill bit bottom jet, the removing of more convenient drilling cuttings, the quantity of spiral line type nozzle petal groove can be 3-12.

In order further to improve the ability that drills the conglomerate stratum, drill bit can adopt the mode of laminates tooth.But general cloth layer 2-4.

The beneficial effects of the utility model are, have lengthened the gauge part, have improved the mechanical stability of drill bit, for anti-oblique and anti-spiral well, larger benefit are arranged; Oppositely the installation of cutting teeth, guaranteed the two-way realization of creeping into function of drill bit; The cloth tooth of multilayer and the use of rear toothrow have improved the ability that drill bit drills the conglomerate stratum; With the plain nozzle of spiral line type nozzle replacement drill bit, improved the energy of drill bit bottom jet.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the schematic top plan view of the drill bit of the utility model embodiment when being inverted.

Fig. 2 is the perspective view of

wing

2 or 3 shank portions (gauge part).

Fig. 3 is a kind of structural upright schematic diagram after

wing

2 or 3 shank portions (gauge part) improve.

Fig. 4 is the schematic diagram of wing 2 projection on the plane take center line of bit as the axle center.

Fig. 5 is that wing 2 has two layers of cloth tooth, the schematic diagram of projection on the plane take center line of bit as the axle center.

Fig. 6 is the complete section schematic diagram that right hand helix line style nozzle is crossed the center line section.

Fig. 7 is the top view of Fig. 6 spiral line type nozzle.

Fig. 8 is the schematic diagram of the petal-like groove of Fig. 6 spiral line type nozzle projection on the plane take center line as the axle center.

1. bit bodys in figure, 2. the rimmer knife wing, 3. the short sword wing, 4. nozzle, 5. cutting teeth, 6. rear toothrow, 7. reverse cutting teeth, 8. wear-resisting gauge body, 9. two layers of cutting teeth.

The specific embodiment

As shown in Figure 1, the two-way PDC drill bit that creeps into of long gauge, it comprises 3,6 nozzles 4 of 2,3 short sword wings of 1,3 rimmer knife wing of bit body, cutting teeth 5, rear toothrow 6.On bit body 1 in conjunction with the rimmer knife wing 2 and the short sword wing 3; Insert nozzle 4 on the bit body of the front of each wing; The bottom tool bit part insert of wing cutting teeth 5 and rear toothrow 6; The faceted pebble of the shank portion of wing and one section right-hand screw line style of bit body outer cylinder surface formation-gauge part, the gauge part is longer; The gauge part of the rimmer knife wing 2 is partly longer than the gauge of the short sword wing 3.

As shown in Figure 2, on the top of wing--be the top of shank portion, insert 3 reverse cutting teeths 7; On the front of wing--be the handle of a knife position with arc-shaped surface that well contacts on, stud with wear-resisting gauge body 8.The vertical length of the faceted pebble of spiral line type-gauge part is 250 millimeters, and its pitch is 600 millimeters.

As shown in Figure 3, the shape of the slightly little dumbbell of diameter is processed in the centre of wing shank portion.

As shown in Figure 4, on the top of wing--be the top of shank portion, insert 3 reverse cutting teeths 7 of sheet, and the tool bit part insert column cutting teeth 5 in the bottom of wing.

As shown in Figure 5, the tool bit part insert column cutting teeth 5 in the bottom of wing, also has second layer cloth tooth, and insert two layers of cutting teeth 9 of sheet.

As Fig. 6, Fig. 7, shown in Figure 8, on the inwall of two circular arc type nozzles of routine, process cextrorotory petal-like groove-formation right-hand screw line style nozzle, petal-like groove has six.

Claims

1. two-way PDC drill bit that creeps into of long gauge, mainly be comprised of bit body (1), the rimmer knife wing (2), the short sword wing (3), nozzle (4), cutting teeth (5), wear-resisting gauge body (8), it is characterized in that: the bottom tool bit part insert of the rimmer knife wing (2) or the short sword wing (3) cutting teeth (5) and rear toothrow (6); Top at the rimmer knife wing (2) or the short sword wing (3)--be the top of shank portion, insert oppositely cutting teeth (7); The faceted pebble of the shank portion of wing and one section right-hand screw line style of bit body outer cylinder surface formation-gauge part, the gauge part is longer.

2. the two-way PDC drill bit that creeps into of a kind of long gauge according to claim 1, it is characterized in that: the long 150-500 millimeter of the faceted pebble of the gauge part of drill bit--right-hand screw line style, the pitch of right-hand screw line style faceted pebble is the 200-900 millimeter.

3. the two-way PDC drill bit that creeps into of a kind of long gauge according to claim 1, it is characterized in that: bit gauge protection partly is processed into the shape of the slightly little dumbbell of mid diameter.

4. the two-way PDC drill bit that creeps into of a kind of long gauge according to claim 1, it is characterized in that: the shank portion of the drill bit rimmer knife wing (2) and the short sword wing (3)-be the bit gauge protection part, can be processed into the short form of gauge part of the long and short wing of gauge part (3) of the rimmer knife wing (2).

5. the two-way PDC drill bit that creeps into of a kind of long gauge according to claim 1, it is characterized in that: on the inwall of two circular arc type nozzles of routine, process the petal-like groove of rotation direction-namely form spiral line type nozzle, replace the plain nozzle of drill bit with the spiral line type nozzle, the spiral line type nozzle can use one or a plurality of.

6. a kind of spiral line type nozzle of growing the two-way PDC of the creeping into drill bit of gauge according to claim 5 is characterized in that: the quantity of spiral line type nozzle petal groove can be 3-12.

7. a kind of spiral line type nozzle of growing the two-way PDC of the creeping into drill bit of gauge according to claim 5, it is characterized in that: the spiral line type nozzle is the right-hand screw line style.

8. the two-way PDC drill bit that creeps into of a kind of long gauge according to claim 1, it is characterized in that: drill bit can adopt the mode of laminates tooth, but general cloth layer 2-4.