CN204476288U - A kind of anti-Gravel drill bit - Google Patents

A kind of anti-Gravel drill bit Download PDF

Info

Publication number
CN204476288U
CN204476288U CN201420815927.6U CN201420815927U CN204476288U CN 204476288 U CN204476288 U CN 204476288U CN 201420815927 U CN201420815927 U CN 201420815927U CN 204476288 U CN204476288 U CN 204476288U
Authority
CN
China
Prior art keywords
bit
drill bit
straightway
wing
installs
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.)
Active
Application number
CN201420815927.6U
Other languages
Chinese (zh)
Inventor
周斌
王军平
刁建波
黄文岩
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.)
Taizhou Baorui Petroleum Equipment Manufacturing Co Ltd
Original Assignee
Taizhou Baorui Petroleum Equipment Manufacturing Co Ltd
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 Taizhou Baorui Petroleum Equipment Manufacturing Co Ltd filed Critical Taizhou Baorui Petroleum Equipment Manufacturing Co Ltd
Priority to CN201420815927.6U priority Critical patent/CN204476288U/en
Application granted granted Critical
Publication of CN204476288U publication Critical patent/CN204476288U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a kind of anti-Gravel drill bit, comprise bit body and wing, the bizet of bit body is made up of the first straightway, flat arc section and the second straightway, first straightway installs hemi-spherical ended shape insert, flat arc section installs spoon type tooth and conical tooth, and the second straightway installs diamond compact, and bit body is provided with 7 nozzles, form chip area between nozzle and wing, wing is provided with 5.Adopt this anti-Gravel drill bit, bit body adopts outer cone scoop chisel insert, the arrangement of inner cone diamond compact, make full use of the shock resistance of scoop chisel insert, strengthen the stability of drill bit, overcome traditional PD C drill bit and collapse tooth, the problem that application life is short.

Description

A kind of anti-Gravel drill bit
Technical field
The utility model discloses a kind of anti-Gravel drill bit, belong to well dynamic field of tool.
Background technology
PDC drill bit has higher rate of penetration, longer application life, be applicable to creeping into soft in hard homogeneous formation, be worldwide widely used, existing oneself becomes the maximum drill bit of onsite application.But PDC drill bit formation condition responsive is strong, when creeping on conglomerate stratum, cutting teeth is easily subject to larger shock loading and collapses tooth and lose cutting power, cause that footage per bit is low can not effectively drill conglomerate interval, conventional PDC drill bit even creeps into several meters and is just damaged and has to trip out PDC drill bit.In the application of current scene, bore this stratum of chance and generally first put on portion's sandstone formation by PDC bit drills, then change rock bit into and drill conglomerate interval, gain PDC drill bit again to continue to bore conglomerate with sub-surface, make a trip frequently and seriously add drilling time, and rock bit drilling efficiency is low and antiwear property is poor, the low drilling time of the drilling efficiency in conglomerate is long, considerably increases drilling cost.
For a long time, Chinese scholars has carried out positive exploration in PDC drill bit, proposes and much improves one's methods.Such as optimize corona shape, adopt multiple cloth toothing, increase anti-whirling motion design, the aspects such as development of new composite sheet material improve the service behaviour of drill bit, increase the service life.The development of these methods to PDC bit technique serves positive impetus, but all fundamentally can not solve the problem of PDC drill bit to this ground adaptability.Therefore, break through traditional thinking mode, from new angle, drill bit parameters is studied, develop the needs that a kind of composite drill bit being applicable to creeping into containing gravel stratum is bit technique development, being the needs of current whole drilling technology system, is the needs improving drilling well overall economic efficiency.
Utility model content
The technical problems to be solved in the utility model is to provide the strong drill bit of a kind of broken gravel ability.
In order to solve the problems of the technologies described above, the utility model provides a kind of anti-Gravel drill bit, comprise bit body and wing, the bizet of bit body is made up of the first straightway, flat arc section and the second straightway, described first straightway installs hemi-spherical ended shape insert, flat arc section installs spoon type tooth and conical tooth, and the second straightway installs diamond compact.
As further improvement of the utility model, described bit body is provided with 7 nozzles, forms chip area between nozzle and wing.
As further improvement of the utility model, described wing is provided with 5.
Adopt said structure, its beneficial effect is: adopt this anti-Gravel drill bit, overcomes traditional PD C drill bit and collapses tooth, the problem that application life is short.
Crown configurations on bit body adopts the structure of straight line-Ping circular arc-straight line, and be separated inner cone and outer cone effect function, inner cone flank overweights press-in shearing-crushing and ensures to creep into machine speed, and outer cone flank overweights the impact resistance improving drill bit.The length of inner cone determines drill bit drilling efficiency, because the tooth that collapses of PDC drill bit mainly occurs in outer cone district, so inner cone straightway adopts diamond compact tooth to ensure that under the prerequisite not affecting drilling life of bit creep into machine speed.Outer cone district is by scoop chisel insert as main cutting tooth, and conical tooth is as gauge teeth.Scoop chisel insert is not only beneficial to rotary cutting can also bear larger shock loading, and conical tooth can bear the radial impact power because drill bit oscillation crosswise produces.End face circular arc seamlessly transit decrease due to stress mutation increase the weight of cutting teeth wearing and tearing probability, improve drilling life of bit.Bit body adopts 7 minor diameter hydrophthalmias, increases bit pressuredrop, improve waterpower auxiliary rock ability, protection drill bit, thus improve drilling efficiency.Outer straightway gathers hemi-spherical ended shape insert, increases the contact area of drill bit and the borehole wall, raising stability of bit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anti-Gravel drill bit of the utility model.
Fig. 2 is the crown configurations schematic diagram of the anti-Gravel drill bit of the utility model.
Fig. 3 is the spoon type toothing schematic diagram of the anti-Gravel drill bit of the utility model.
Fig. 4 is the diamond compact structural representation of the anti-Gravel drill bit of the utility model.
Fig. 5 is the conical tooth structural representation of the anti-Gravel drill bit of the utility model.
Fig. 6 is the hemi-spherical ended shape insert structural representation of the anti-Gravel drill bit of the utility model.
In figure: 1-bit body, 2-wing, 3-spoon type tooth, 4-diamond compact, 5-nozzle, 6-chip area, 7-conical tooth, 8-hemi-spherical ended shape insert.
1-1-straightway, the flat arc section of 1-2-, 1-3-straightway.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in more detail.
As shown in figures 1 to 6, a kind of anti-Gravel drill bit, comprise bit body 1 and wing 2, the bizet of described bit body 1 is made up of the first straightway 1-1, flat arc section 1-2 and the second straightway 1-3, and described first straightway 1-1 installs hemi-spherical ended shape insert 8, and flat arc section 1-2 installs spoon type tooth 3 and conical tooth 7, second straightway 1-3 installs diamond compact 4, described bit body 1 is provided with 7 nozzles 5, forms chip area 6 between nozzle 5 and wing 2, and described wing 2 is provided with 5.
During use, anti-for the utility model Gravel drill bit is arranged on drilling tool lower end, couples together with other downhole tool, then turn on pump circulating fluid rotary drilling of pressurizeing.In drilling process, from the nozzle 5 of bit body 1, spray drilling fluid constantly by chip area 6, the landwaste of fragmentation is entered bore hole annulus, simultaneously by high speed drilling fluid auxiliary rock that nozzle 5 obtains.In fractured rock process, contact rock in advance by scoop chisel insert 3, fractured rock, then diamond compact 4 fractured rock.Scoop chisel insert 3 carries the pressure of the drill; wedging stratum; along with the rotational shear rock of drill bit; because scoop chisel insert 3 is in the process on wedging stratum; strengthen gradually with the contact surface of rock, improve stability of bit, reduce the probability that " bit bouncing ", " bouncing of drilling tool " occur on such stratum conventional PDC drill bit; thus protect the rotational shear of outer cone diamond compact 4, substantially increase drilling life of bit.Hemi-spherical ended shape insert 8 fully contacts with the borehole wall and gauge common with conical tooth 7, improves stability of bit and available protecting drill body.
Any employing and the similar drill bit designed by technical characteristic of the utility model will fall within protection domain of the present utility model.

Claims (3)

1. an anti-Gravel drill bit, comprise bit body (1) and wing (2), it is characterized in that: the bizet of described bit body (1) is made up of the first straightway (1-1), flat arc section (1-2) and the second straightway (1-3), described first straightway (1-1) installs hemi-spherical ended shape insert (8), flat arc section (1-2) installs spoon type tooth (3) and conical tooth (7), and the second straightway (1-3) installs diamond compact (4).
2. the anti-Gravel drill bit of one according to claim 1, is characterized in that: described bit body (1) is provided with 7 nozzles (5), forms chip area (6) between nozzle (5) and wing (2).
3. the anti-Gravel drill bit of one according to claim 1, is characterized in that: described wing (2) is provided with 5.
CN201420815927.6U 2014-12-22 2014-12-22 A kind of anti-Gravel drill bit Active CN204476288U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420815927.6U CN204476288U (en) 2014-12-22 2014-12-22 A kind of anti-Gravel drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420815927.6U CN204476288U (en) 2014-12-22 2014-12-22 A kind of anti-Gravel drill bit

Publications (1)

Publication Number Publication Date
CN204476288U true CN204476288U (en) 2015-07-15

Family

ID=53632090

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420815927.6U Active CN204476288U (en) 2014-12-22 2014-12-22 A kind of anti-Gravel drill bit

Country Status (1)

Country Link
CN (1) CN204476288U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104499947A (en) * 2014-12-22 2015-04-08 泰州市宝锐石油设备制造有限公司 Gravel-resistant drill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104499947A (en) * 2014-12-22 2015-04-08 泰州市宝锐石油设备制造有限公司 Gravel-resistant drill

Similar Documents

Publication Publication Date Title
CN203905815U (en) Double-core reaming bit with multiple stages of reaming bodies
CN203867472U (en) Combined drill bit combining PDC drill bit and roller bit to break rock
CN204476288U (en) A kind of anti-Gravel drill bit
CN102022084B (en) Compound single cone bit
CN103939022B (en) The combined drill of a kind of PDC drill bit and rock bit combined-breaking rock
CN104329030A (en) Six-point positioning inwards recessed three-wing PDC noncoring bit structure and gauge protection method of six-point positioning inwards recessed three-wing PDC noncoring bit structure
CN202788630U (en) Polycrystalline diamond compact (PDC) drill bit with sharp teeth
CN203452651U (en) Strong cone PDC (Polycrystalline Diamond Compact) vibration reduction acceleration drill bit
CN204663395U (en) A kind of PDC drill bit of anti-vibration
CN203452652U (en) PDC (polycrystalline diamond compact) drilling bit
CN201292773Y (en) PDC drill for drilling flexible and hard interactive strata
CN203822166U (en) PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions
CN104499947A (en) Gravel-resistant drill
CN208430975U (en) A kind of long-life single rock bit
CN202706923U (en) Reinforced polycrystalline diamond compact (PDC) drill
CN102213078A (en) Internal spiral nozzle with diversion trench
CN203097721U (en) High-energy percussion rock-breaking PDC (polycrystalline diamond compact) drill bit
CN204691684U (en) Be applicable to the PDC drill bit crept into containing gravel stratum
CN203463017U (en) Diamond-impregnated bit
CN204663401U (en) A kind of PDC drill bit improving heart portion efficiency of breaking rock
CN204920801U (en) Drilling system's PDC drill bit is fit for spinning
CN204175190U (en) A kind of six point location indent three wings PDC borehole bit structures
CN206000471U (en) A kind of preventing sticking PDC drill bit
CN204476283U (en) A kind of novel five wing PDC drill bits
CN104131785A (en) Single-cone PDC concentric RWD drill bit

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model