CN201284623Y

CN201284623Y - Composite long fin piece scraper type steel PDC drilling bit

Info

Publication number: CN201284623Y
Application number: CNU2008200155407U
Authority: CN
Inventors: 殷文著
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2009-08-05
Anticipated expiration: 2018-09-11

Abstract

The utility model relates to a composite long fin blade type steel body PDC drill bit, belonging to the equipment for oilfield drilling, which consists of a joint, a shunting head, fins and tooth columns. A cylinder in the joint is connected to a cylindrical shunting head, the top end of the cylindrical shunting head is in the shape of a sphere, at least one fin is embedded on the circumference of the cylindrical shunting head from the spherical surface to the cylindrical surface; a plurality of tooth cylinders are horizontally embedded on the surface of the arc segments of the fins; a plurality of composite plates are embedded at the front ends of the tooth cylinders, and a through-hole water port is arranged on the spherical surface of the shunting head. The utility model has the advantages of simple fabrication technology, low fabrication cost, rare metals saving, energy consumption saving, strong adaptability, faster drilling velocity, good abrasion and strong cutting capability under the condition that the PDC plate is completely abraded, and can efficiently enhance drilling footage and reuse after being repaired, thereby greatly fastening oilfield development speed and greatly reducing development cost.

Description

Compound long fin scraper type steel body PDC drill bit

Technical field

The utility model belongs to oil field welldrilling equipment, particularly relates to a kind of compound long fin scraper type steel body PDC drill bit.

Background technology

At present, the drill bit that the oil field development drilling well is used is the PDC drill bit that sinters into cast tungsten carbide mostly, this drill bit complex manufacturing technology, required raw material types is various, rare metal particularly, and every needs to consume 20～50 kilograms of tungsten carbides, 10～30 kilograms of copper alloys, sintering process needs a large amount of electric energy again, not only wastes a large amount of non-renewable resources, but also has consumed a large amount of electric energy, increased cost of production, wasted energy.And with the moulding of five-axle linkage milling machine time processing, integral type steel body PDC drill bit exists the PDC composite sheet and exists problems of welded quality, unstable product quality in process.

Summary of the invention

The utility model is intended to overcome the deficiencies in the prior art, and a kind of compound long fin scraper type steel body PDC drill bit is provided.

Compound long fin scraper type steel body PDC drill bit of the present utility model is to be made of joint, shunt head, fin and tooth post.On the cylinder of joint, connected the cylinder shunt head, the top of cylinder shunt head is spherical, on the post circumference of shunt head, be embedded with more than one fin from spherical to damaged surface, horizontal several tooth posts of inlaying on the surface of the segmental arc of fin, front end at the tooth post is inlayed composite sheet, is provided with the open-work hydrophthalmia on the spherical of shunt head.

As further improvement of the utility model, on the circumference of shunt head, be embedded with 1～8 fin equally spacedly from spherical to cylinder face.

As further improvement of the utility model, be not equidistant by the central point of the spherical of the upper end of the segmental arc of fin and shunt head.

As further improvement of the utility model, be to have inlayed several tooth posts of vertically arranging along sides of arcwall face on the surface of segmental arc of fin.

Composite sheet of the present utility model is to flow out for drill in fluid for cutting unit, hydrophthalmia effect, and shunt head plays the hydrophthalmia fixation, and the tooth post mainly plays supporting and welding composite sheet usefulness, and joint has been an anastomosis between upper crown and the drilling tool.

The utility model drill bit applying three-dimensional design software, adopt the design theory and the processing technology of diamond drag bit and PDC drill bit to be made, do not use the cast tungsten carbide moulding, cutting element is with PDC composite sheet and special wear-resisting tooth post, adopt the vacuum diffusion welding technology to weld together and become cutter assembly, fin is to adopt the special steel material, use the preformed hole that five Cutter Body Processing with Machining Center go out to weld cutter assembly, adopt vacuum diffusion welding or non-ferrous metal soldering tech that the cutter assembly and the rimmer knife wing are welded together, become the long fin of composite doctor blade formula, again with long fin of composite doctor blade and shunt head, joint welds together, thereby finishes the making of long fin scraper type steel body PDC drill bit.

The compound long fin scraper type steel body PDC drill bit processing technology thereof of the utility model is simple, cost of production is lower, saving rare metal, energy-saving and cost-reducing, compliance is strong, faster than common PDC footage per bit, and under the situation that the PDC sheet weares and teares fully, compound long fin still has very strong abrasion resistance and cutting function, can increase drill footage effectively, can repair use again, thereby accelerate oil field development speed greatly, reduce development cost significantly.The utility model drill bit has reduced by 1/4～1/3 than the generic PDC drill bit cost of sintering, every drill bit is saved tungsten carbide more than 20 kilograms, saves 200～300 kilowatt-hours of electric energy, calculates by 1000 drill bits, more than year economize on electricity 200,000 degree, and reduced dust pollution.

Description of drawings

Fig. 1 is the structural representation of the compound long fin scraper type steel body PDC drill bit of the utility model.

Fig. 2 is the vertical view of the compound long fin scraper type steel body PDC drill bit of the utility model

The specific embodiment

Embodiment 1

Compound long fin scraper type steel body PDC drill bit of the present utility model is to be made of joint 1, shunt head 2, fin 3 and tooth post 4.On the cylinder of joint 1, connected cylinder shunt head 2, the top of cylinder shunt head 2 is spherical, on the post circumference of shunt head 2, be embedded with more than one fin 3 from spherical 5 to damaged surface, horizontal several tooth posts 4 of inlaying on the surface of the segmental arc 6 of fin 3, inlay composite sheet 7 at the front end of tooth post 4, on the spherical 5 of shunt head 2, be provided with open-work hydrophthalmia 8.

Embodiment 2

Compound long fin scraper type steel body PDC drill bit of the present utility model is to be made of joint 1, shunt head 2, fin 3 and tooth post 4.On the cylinder of joint 1, connected cylinder shunt head 2, the top of cylinder shunt head 2 is spherical, on the post circumference of shunt head 2, be embedded with 8 fin 3 equally spacedly from spherical 5 to damaged surface, horizontal several tooth posts 4 of inlaying on the surface of the segmental arc 6 of fin 3, inlay composite sheet 7 at the front end of tooth post 4, on the spherical 5 of shunt head 2, be provided with open-work hydrophthalmia 8.

Embodiment 3

Compound long fin scraper type steel body PDC drill bit of the present utility model is to be made of joint 1, shunt head 2, fin 3 and tooth post 4.On the cylinder of joint 1, connected cylinder shunt head 2, the top of cylinder shunt head 2 is spherical, be embedded with four fin 3 on the post circumference of shunt head 2 equally spacedly from spherical 5 to damaged surface, the central point of the upper end of the segmental arc 6 of each fin 3 and the spherical of shunt head 2 is not equidistant.Horizontally on the surface of the segmental arc 6 of fin 3 inlay several, inlay composite sheet 7, on the spherical 5 of shunt head 2, be provided with open-work hydrophthalmia 8 at the front end of tooth post 4 along the tooth post 4 that sides of arcwall face are vertically arranged.

Claims

1, compound long fin scraper type steel body PDC drill bit, be by joint (1), shunt head (2), fin (3) and tooth post (4) constitute, it is characterized in that on the cylinder of joint (1), having connected cylinder shunt head (2), the top of cylinder shunt head (2) is spherical, on the post circumference of shunt head (2), be embedded with more than one fin (3) from spherical (5) to damaged surface, horizontal several tooth posts (4) of inlaying on the surface of the segmental arc (6) of fin (3), inlay composite sheet (7) at the front end of tooth post (4), on the spherical (5) of shunt head (2), be provided with open-work hydrophthalmia (8).

2, compound long fin scraper type steel body PDC drill bit as claimed in claim 1 is characterized in that being embedded with 1～8 fin (3) equally spacedly from spherical (5) to cylinder face on the circumference of shunt head (2).

3, compound long fin scraper type steel body PDC drill bit as claimed in claim 2 is characterized in that being not equidistant by the central point of the spherical of the upper end of the segmental arc (6) of fin (3) and shunt head (2).

4, compound long fin scraper type steel body PDC drill bit as claimed in claim 1 or 2 is characterized in that having inlayed several tooth posts (4) of vertically arranging along sides of arcwall face on the surface of segmental arc (6) of fin (3).