CN203362039U - Nozzle for particle impact roller bit - Google Patents

Nozzle for particle impact roller bit Download PDF

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Publication number
CN203362039U
CN203362039U CN 201320445709 CN201320445709U CN203362039U CN 203362039 U CN203362039 U CN 203362039U CN 201320445709 CN201320445709 CN 201320445709 CN 201320445709 U CN201320445709 U CN 201320445709U CN 203362039 U CN203362039 U CN 203362039U
Authority
CN
China
Prior art keywords
nozzle
conical
cylindrical
particle
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201320445709
Other languages
Chinese (zh)
Inventor
周龙昌
韩立国
石超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Petroleum Beijing CUPB
China University of Petroleum UPC East China
Original Assignee
China University of Petroleum UPC East China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Petroleum UPC East China filed Critical China University of Petroleum UPC East China
Priority to CN 201320445709 priority Critical patent/CN203362039U/en
Application granted granted Critical
Publication of CN203362039U publication Critical patent/CN203362039U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model belongs to the technical field of well drilling devices and particularly relates to a nozzle for a particle impact roller bit. The nozzle comprises a nozzle body, wherein the nozzle body comprises a front nozzle section and a rear nozzle section; the front nozzle section is a tapered section and the rear nozzle section is a cylindrical section; the small-diameter end of the tapered section is connected with the cylindrical section; a fillet is arranged at the inner wall joint between the tapered section and the cylindrical section. According to the nozzle for the particle impact roller bit, an erosive wear mechanism and properties of the nozzle body and an acceleration effect of particles can be considered integrally due to the structure design and the manufacturing of an inner runner of the nozzle body, so that the acceleration of the particles in the nozzle body can be met, a rock breaking effect is realized and the erosive wear to the nozzle body by the particles can also be reduced; with the adoption of the nozzle body which is designed reasonably, the speed of the particles can reach up to about 80% of a mud jet speed, certain requirements on the service life by particle impact well drilling are met and the wear-resisting property is improved; meanwhile, the jet requirements are also met so that the particles can be accelerated to the required speed in a flowing process.

Description

Particle impacting rock bit nozzle
Technical field
The utility model relates to a kind of particle impacting rock bit nozzle, belongs to the drilling rig technical field.
Background technology
Due to factors such as formation hardness are high, abrasiveness is strong, drillability is poor, the rate of penetration on the stratum that the hardness high abrasive is strong is slower, has increased the cost of drilling well at present.Sichuan Xu Jiahe group stratum is exactly typical representative.Group stratum, Xu Jia river is mainly siliceous cementing quartz sandstone, and the formation hardness degree is high, abrasiveness is strong, drillability is poor, bit consumption large (account for full well 74%), and footage per bit and average life span are all shorter.Common PDC drill bit and rock bit drilling speed all are difficult to satisfactory.When the PDC drill bit creeps into this strong abrasiveness hard formation, the wedging difficulty, the rate of wear is fast.During this stratum of roller bit cutting, rate of penetration is slow, and single footage per bit is few.Average rate of penetration is often lower than 1m/s, and drilling depth is few, drilling speed is slow, can't meet the modern deep drilling requirement of " breaking into, accomplish fluently, beat fast ".
By formation lithology is conscientiously investigated, make every effort to particle impact drilling technology is introduced in creeping into of group stratum, Xu Jia river.Owing to relying on particle impacting at a high speed during broken rock fully, very high to pump pressure, discharge capacity, concentration requirement, domestic general site plant is difficult to meet, and particle impact drilling technology not yet carried out field experiment at home, there is no on-the-spot real brill experience, belong to the initial research stage.So present stage first combines the broken rock of particle impacting and drill bit mechanical rock breaking, the broken rock of particle impacting plays auxiliary rock, probes into the actual drilling effect of particle punching drilling.
The utility model content
The technical problems to be solved in the utility model is: provide a kind of simple in structure, can realize that particle efficient breaks rock, improve abrasion resistance, and then can improve the particle impacting rock bit nozzle in application life.
Particle impacting rock bit nozzle described in the utility model, comprise nozzle body, nozzle body comprises nozzle leading portion and nozzle back segment, the nozzle leading portion is conical section, the nozzle back segment is cylindrical section, the miner diameter end connecting cylinder section of conical section, the inwall junction between conical section and cylindrical section arranges rounding.
Nozzle body, for the straight type of cone, is bored straight type nozzle and is had the loss amount minimum, and the most wear-resisting advantage can reach the broken desired speed of rock of particle, improves efficiency of breaking rock and application life; During work, the bigger diameter end of conical section is fluid intake, meets mechanism and the characteristic of erosive wear, makes the nozzle body rub proofness improve and can improve acceleration, improves rock breaking efficiency.
Described nozzle body arranged outside steel sleeve.Steel pipe socket can be sintered together with nozzle body, then is arranged on together on drill bit, and nozzle has been played to protective effect, and steel pipe socket is comprised of 40~60 purpose Wc powder, makes that steel sleeve is corrosion-resistant, hardness is high and modulus of elasticity is large, stable performance, long service life.
The length of described conical section is 35mm~37mm, and the internal diameter of bigger diameter end is 25mm~31mm, and the internal diameter of miner diameter end is 12mm, and wall thickness is 3mm, and the length of cylindrical section is 55mm~60mm, and the internal diameter of cylindrical section is 12mm, and wall thickness is 2mm.The setting of conical section and cylindrical section specification, can effectively improve the speed of particle and the abrasion resistance of nozzle body, improves efficiency of breaking rock, the long or too short requirement that all can not simultaneously meet application life and broken rock jet of the length of nozzle body.
The internal face of described conical section and conical section bigger diameter end diametric(al) are 80 degree angles, and the contraction half-angle between conical section internal face and cylindrical section internal face is 10 degree.Shrink half-angle and not only affect acceleration effect, and affect the friction durability of nozzle body, the setting of the utility model angle can improve speed, increases the abrasion resistance of nozzle body.
Described nozzle body material is YG8N type ultra-fine cemented carbide.Hardness is high, and flexural strength, good toughness.
The beneficial effects of the utility model are:
Nozzle body inner flow passage structure design can be taken the speed acceleration of the mechanism of the erosive wear of nozzle body, characteristic and particle into consideration with making, make it can meet the acceleration of particle in nozzle body, reach rock breaking efficiency, can lower again the erosive wear of particle to nozzle body; By the appropriate design nozzle body, can make the particle rapidity reach 80% left and right of slurry jet speed, meet particle punching drilling to certain requirement in application life, improve anti-wear performance, also to meet the requirement of jet, make particle can when flowing, accelerate to the speed of requirement simultaneously.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of nozzle body in Fig. 1.
In figure: 1, steel sleeve 2, nozzle body 3, conical section 4, cylindrical section 5, rounding.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Fig. 1~Fig. 2, particle impacting rock bit nozzle described in the utility model, comprise nozzle body 2, nozzle body 2 comprises nozzle leading portion and nozzle back segment, the nozzle leading portion is conical section 3, the nozzle back segment is cylindrical section 4, the miner diameter end connecting cylinder section 4 of conical section 3, and the inwall junction between conical section 3 and cylindrical section 4 arranges rounding 5.Nozzle body 2 arranged outside steel sleeves 1.The length of conical section 3 is 36mm, and the internal diameter of bigger diameter end is 25mm, and the internal diameter of miner diameter end is 12mm, and wall thickness is 3mm, and the length of cylindrical section 4 is 60mm, and the internal diameter of cylindrical section 4 is 12mm, and wall thickness is 2mm.The internal face of conical section 3 and conical section 3 bigger diameter end diametric(al)s are 80 degree angles, included angle A as shown in Figure 2, and the contraction half-angle between conical section 3 internal faces and cylindrical section 4 internal faces is 10 degree, included angle B as shown in Figure 2.Nozzle body 2 materials are YG8N type ultra-fine cemented carbide.
During work, particle flows into from the bigger diameter end of conical section 3, improves by conical section 3 and the rear particle rapidity of cylindrical section 4, and produces jet, and rock is carried out to fragmentation.

Claims (5)

1. a particle impacting rock bit nozzle, comprise nozzle body, it is characterized in that: nozzle body (2) comprises nozzle leading portion and nozzle back segment, the nozzle leading portion is conical section (3), the nozzle back segment is cylindrical section (4), the miner diameter end connecting cylinder section (4) of conical section (3), the inwall junction between conical section (3) and cylindrical section (4) arranges rounding (5).
2. particle impacting rock bit nozzle according to claim 1, is characterized in that: nozzle body (2) arranged outside steel sleeve (1).
3. particle impacting rock bit nozzle according to claim 1 and 2, it is characterized in that: the length of conical section (3) is 35mm~37mm, the internal diameter of bigger diameter end is 25mm~31mm, the internal diameter of miner diameter end is 12mm, wall thickness is 3mm, the length of cylindrical section (4) is 55mm~60mm, and internal diameter is 12mm, and wall thickness is 2mm.
4. particle impacting rock bit nozzle according to claim 3, it is characterized in that: the internal face of conical section (3) and conical section bigger diameter end diametric(al) are 80 degree angles, and the contraction half-angle between conical section (3) internal face and cylindrical section (4) internal face is 10 degree.
5. according to the described particle impacting rock bit of claim 1 or 2 nozzle, it is characterized in that: nozzle body (2) material is YG8N type ultra-fine cemented carbide.
CN 201320445709 2013-07-23 2013-07-23 Nozzle for particle impact roller bit Expired - Fee Related CN203362039U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320445709 CN203362039U (en) 2013-07-23 2013-07-23 Nozzle for particle impact roller bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320445709 CN203362039U (en) 2013-07-23 2013-07-23 Nozzle for particle impact roller bit

Publications (1)

Publication Number Publication Date
CN203362039U true CN203362039U (en) 2013-12-25

Family

ID=49809825

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320445709 Expired - Fee Related CN203362039U (en) 2013-07-23 2013-07-23 Nozzle for particle impact roller bit

Country Status (1)

Country Link
CN (1) CN203362039U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105275402A (en) * 2015-11-12 2016-01-27 中国石油大学(华东) Particle jet flow-based drill bit for impacting and breaking rocks
CN108360976A (en) * 2018-02-11 2018-08-03 河北工业大学 Particle punching drilling nozzle flow channel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105275402A (en) * 2015-11-12 2016-01-27 中国石油大学(华东) Particle jet flow-based drill bit for impacting and breaking rocks
CN105275402B (en) * 2015-11-12 2018-01-30 中国石油大学(华东) Particle stream flow rock fracture in dynamic indentation drill bit
CN108360976A (en) * 2018-02-11 2018-08-03 河北工业大学 Particle punching drilling nozzle flow channel

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131225

Termination date: 20160723

CF01 Termination of patent right due to non-payment of annual fee