CN107780836A - reamer - Google Patents
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- Publication number
- CN107780836A CN107780836A CN201711011963.1A CN201711011963A CN107780836A CN 107780836 A CN107780836 A CN 107780836A CN 201711011963 A CN201711011963 A CN 201711011963A CN 107780836 A CN107780836 A CN 107780836A
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- CN
- China
- Prior art keywords
- spiral
- wing
- wings
- reamer
- spiral wings
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
Abstract
This application provides a kind of reamer, including：Body, the top and bottom of the body are connected to top connection and lower contact, the outer wall of the top connection is provided with multiple first spiral wings, the outer wall of the lower contact is provided with multiple second spiral wings, the hand of spiral of multiple first spiral wings is opposite with the hand of spiral of multiple second spiral wings, multiple first spiral wings circumferentially partly surround the top connection, multiple second spiral wings circumferentially partly surround the lower contact, and multiple first spiral wings and multiple second spiral wings are distributed in the relative both sides of the body, the circumferentially distributed angle of multiple first spiral wings and the circumferentially distributed angle sum of multiple second spiral wings are 360 degree.The reamer of the application can eliminate the micro- spiral of well, improve the smoothness of well-drilling borehole, and Cutting Disposal, solve the problems such as undergauge bit freezing, drag and torque in drilling are big, landwaste carrying is difficult.
Description
Technical field
The application is related to drilling equipment technical field, more particularly to a kind of reamer.
Background technology
The description of this part only provides the background information related to disclosure, without forming prior art.
With the continuous decline of petroleum resources grade, oil-gas exploration and development gradually shifts to unconventional, hyposmosis field, bores
The stratum that well faces is more diversified.The salt deposit of creep properties, expansile shale easily cause hole shrinkage, cause tight trip
Or the increase of bit freezing risk, horizontal well, extended reach well quantity are continuously increased, easily there is cutting bed heap in inclination section and horizontal segment drilling
The problems such as product, hole anomaly, drag and torque are big, backing pressure is serious, constrain the raising of drilling efficiency.
Pit shaft quality is one of most important factor in drilling process, and pit shaft poor quality typically can show as well not
Freely, hole diameter is irregular, forms Spiral borehole or well flexing occurs, so as to cause to make a trip, electrical measurement, casing job be hampered,
The accident suppressed Lou stratum or pull out the stratum that collapses is easily caused, well is caused safely to have a strong impact on.
Specifically, for example, in drilling process, drilling rod can transmit moment of torsion, apply the pressure of the drill, bear the drilling tool weight such as drill collar
Amount.During drilling construction, due to the scrambling of Spiral borehole, drilling rod contacts with the irregular borehole wall, and frictional resistance is very
Greatly, to the serious wear of drilling tool, the phenomenon of worn down often occurs, so as to cause its bearing capacity to decline, breaks for drilling rod
The accident of splitting hides some dangers for, and directly affects drilling period.
For another example due to the scrambling of Spiral borehole, the tripping in of well cementing process middle sleeve is difficult, and frictional resistance and moment of torsion increase
Add, drilling fluid is bad, and cementing is bad, and cementing quality is poor, cement sheath intensity and the extraneous mechanics of resistance, chemical action
Reduced capability, so as to reduce the life-span of well, increase later development risk, or even scrap whole mouth well, cause serious economic damage
Lose.
Reaming while drilling technology is a drilling well new technology of rising in recent years, and its principle is being covered using reaming while drilling instrument
The following side of boring of pipe is expanded, and the borehole size so drilled out is bigger than pilot bit size, to reach raising total completion time and solve complicated
The purpose of accident.Reaming while drilling technology is typically considered a kind of unconventional drilling technology, is the important skill of slimhole drilling
One of art.But still there are many technological difficulties to have a strong impact on operating efficiency in reaming while drilling drilling process.
In recent years, all reaming while drilling technology is studied both at home and abroad, but some hole reaming tools are during reaming hole
Caused rock debris particle diameter is excessive so that Transport of Drilling Cutting In A efficiency is low, and landwaste easily accumulation forms cutting bed, causes drill string
High frictional resistance, high torque, cause the well security incident such as bit freezing, drilling string broken off when serious, at the same cutting bed formed after have an effect on after
Continuous operation, sleeve pipe tripping in difficulty, cementing quality difference are such as caused, adds operating risk and cost.Therefore, how to be repaired with brill
The borehole wall, Cutting Disposal, well smoothness in drilling process is improved, ensure pit shaft safety, be technical problem urgently to be resolved hurrily.
It should be noted that the introduction to technical background above be intended merely to the convenient technical scheme to the application carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Can not merely because these schemes the application's
Background section is set forth and thinks that above-mentioned technical proposal is known to those skilled in the art.
The content of the invention
Based on foregoing prior art defect, this application provides a kind of reamer, and it can eliminate the micro- spiral of well, carry
The smoothness of high well-drilling borehole, and Cutting Disposal, solves big, landwaste carrying difficulty of undergauge bit freezing, drag and torque in drilling etc.
Problem, good wellbore environment is created for later stage operation.
To achieve these goals, this application provides following technical scheme.
A kind of reamer, the reamer can be connected with drill string, and be rotated under the drive of the drill string；Including：This
Body, the top and bottom of the body are connected to top connection and lower contact, and the outer wall of the top connection is provided with multiple
One spiral wing, the outer wall of the lower contact are provided with multiple second spiral wings, the spiral of multiple first spiral wings
The hand of spiral of direction and multiple second spiral wings is on the contrary, multiple first spiral wings circumferentially partly surround institute
Top connection is stated, multiple second spiral wings circumferentially partly surround the lower contact, and multiple first spiral wings
With multiple second spiral wings both sides that to be distributed in the body relative, multiple first spiral wings it is circumferentially distributed
Angle and the circumferentially distributed angle sum of multiple second spiral wings are 360 degree.
Preferably, the body along its it is axially arranged have a passage, the top connection and lower contact axially through.
Preferably, the top connection and lower contact are wholely set with the body.
Preferably, multiple first spiral wings circumferentially 0 to 180 degree be distributed, multiple second spiral wing edges
Circumferential 180 to 360 degree distribution.
Preferably, on direction from top to bottom, the hand of spiral of multiple first spiral wings is clockwise, Duo Gesuo
The hand of spiral for stating the second spiral wing is counterclockwise.
Preferably, on direction from top to bottom, the hand of spiral of multiple first spiral wings is counterclockwise, Duo Gesuo
The hand of spiral for stating the second spiral wing is clockwise.
Preferably, the body is in the form of a column, and it has datum axis, multiple first spiral wings and multiple described
Datum axis described in the center axis deviation of two spiral wings is set, so as to multiple first spiral wings and multiple described the
The relatively described body eccentric setting of two spiral wings.
Preferably, on direction from top to bottom, the thickness of multiple first spiral wings gradually increases, and each described the
Multiple first gauge teeths are provided with the outside wall surface of one spiral wing, multiple first gauge teeths are distributed in first spiral
The lower end of wing, each first spiral wing is towards being provided with multiple first cutting tooths, institute in the side wall of direction of rotation
The quantity for stating the first cutting tooth is more than the quantity of first gauge teeth.
Preferably, on direction from top to bottom, the thickness of multiple second spiral wings is gradually reduced, and each described the
Multiple second gauge teeths are provided with the outside wall surface of two spiral wings, multiple second gauge teeths are distributed in second spiral
The upper end of wing, each second spiral wing is towards being provided with multiple second cutting tooths, institute in the side wall of direction of rotation
The quantity for stating the second cutting tooth is more than the quantity of second gauge teeth.
Technical scheme more than, the beneficial effect of the application are：
The reamer of the application embodiment, by top connection and lower contact outer wall set multiple first spiral wings and
Multiple second spiral wings, spiral helicine wing for circular arc due to seamlessly transitting, so as to gradually cut the borehole wall, caused rock
Bits particle is thinner, and the resistance returned from annular space is smaller, is advantageous to landwaste and returns out ground, and asking for difficulty etc. is carried so as to solve landwaste
Topic.
In addition, multiple first spiral wings and multiple second spiral wings circumferentially partly surround top connection and lower contact
Outer wall, and multiple first spiral wings and multiple second spiral wings are symmetricly set on the relative both sides of body so that the application
The reamer of embodiment with drilling rod during rotating, it is possible to achieve dynamic equilibrium and uniformly cutting, while can prevent
It is hampered, the situation of bit freezing occurs.
Further, multiple first spiral wings and multiple second spiral wing hands of spiral are on the contrary, can cause annular space
The middle abundant eddy flow of drilling fluid, produces more preferable turbulent flow effect, so as to the cutting bed that suspends, in favor of being returned on landwaste.
When it is implemented, the reamer of the application embodiment is arranged on to the top of BHA (BHA), reaming hole
Device rotates with drilling rod.Multiple second spiral wings positioned at bottom carry out first time cutting, screw type knife to drilling well dog-leg
The wing can be cut and be ground to the borehole wall, also, the wing design of screw type can reduce the severe impact to the borehole wall, reach
The problems such as effect uniformly cut and ground, effectively reduction cutting cutting grain are big, hole instability.Superposed multiple
One spiral wing carries out second to drilling well dog-leg and cut, and plays the first spiral wing blind area of further reparation and supplement cutting
Effect, so that well is smoother.
It was verified that the reamer of the application embodiment is used for the saline bed or sloughing shale strata drilling of creep properties
In, it can effectively reduce undergauge and be hampered or bit freezing risk, in horizontal well drilling, can effectively repair the borehole wall, eliminate the micro- dog in underground
Leg, micro- step, keep well unobstructed, while by machinery and hydraulic forces, destroy and Cutting Disposal, reduction well are rubbed
Moment of torsion is hindered, before setting of casing or before tripping in swell packers, it is not necessary to which reaming hole is made after special tripping in hole reaming tool is bored
Industry, ensure well safety, improve drilling efficiency.
Other application field will become obvious according to description provided herein.The description of present invention and specifically show
Example is only intended to the purpose illustrated, it is not intended that limitation the scope of the present invention.
Brief description of the drawings
Accompanying drawing described here is only used for task of explanation, and is not intended in any way to limit model disclosed in the present application
Enclose.In addition, shape and proportional sizes of each part in figure etc. are only schematical, the understanding to the application is used to help, and
It is not the specific shape and proportional sizes for limiting each part of the application.Those skilled in the art, can under teachings of the present application
To select various possible shapes and proportional sizes to implement the application as the case may be.In the accompanying drawings：
Fig. 1 is the structural representation of the reamer of the application embodiment；
Fig. 2 is that the reamer in Fig. 1 rotates the structural representation after 180 degree；
Fig. 3 is the broken section structural representation of the reamer of the application embodiment；
Fig. 4 is the structural representation of Section A-A in Fig. 1；
Fig. 5 is Fig. 1 overlooking the structure diagram.
Embodiment
It should be noted that when a parts are referred to as " being arranged at " another parts, it can be directly another
On individual parts or there may also be parts placed in the middle.When a parts are considered as " connection " another parts,
It can be directly to another parts or may be simultaneously present parts placed in the middle.Term as used herein " is hung down
Directly ", " level ", "left", "right" and similar statement are for illustrative purposes based on Figure of description, are not offered as being only
One embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and the technical field of the application is belonged to
The implication that technical staff is generally understood that is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
The arbitrary and all combination of related Listed Items.
As shown in Figures 1 to 5, the application embodiment provides a kind of reamer, and the reamer can be connected with drill string
Connect, and rotated under the drive of the drill string.It can include：Body 1, the top and bottom of the body 1 are connected to
Top connection 2 and lower contact 3, the outer wall of the top connection 2 are provided with multiple first spiral wings 21, the outer wall of the lower contact 3
It is provided with multiple second spiral wings 31, the hand of spiral and multiple second circular knifes of multiple first spiral wings 21
The hand of spiral of the wing 31 is on the contrary, multiple first spiral wings 21 circumferentially partly surround the top connection 2, and multiple described
Two spiral wings 31 circumferentially partly surround the lower contact 3, and multiple first spiral wings 21 and multiple described second
Spiral wing 31 is distributed in the relative both sides of the body 1, the circumferentially distributed angle of multiple first spiral wings 21 and more
The circumferentially distributed angle sum of the individual second spiral wing 31 is 360 degree.
The reamer of the application embodiment, by setting multiple first spiral wings in top connection 2 and the outer wall of lower contact 3
21 and multiple second spiral wings 31, spiral helicine wing for circular arc due to seamlessly transitting, so as to gradually cut the borehole wall, production
Raw cutting grain is thinner, and the resistance returned from annular space is smaller, is advantageous to landwaste and returns out ground, and difficulty is carried so as to solve landwaste
Deng the problem of.
In addition, circumferentially part surrounds top connection 2 with for multiple first spiral wings 21 and multiple second spiral wings 31
The outer wall of joint 3, and multiple first spiral wings 21 and multiple second spiral wings 31 are symmetricly set on relative two of body 1
Side so that the reamer of the application embodiment with drilling rod during rotating, it is possible to achieve dynamic equilibrium and uniformly cutting,
It can prevent from being hampered simultaneously, the situation of bit freezing occurs.
Further, multiple first spiral wings 21 and multiple hands of spiral of second spiral wing 31 are on the contrary, can cause
The abundant eddy flow of drilling fluid in annular space, produces more preferable turbulent flow effect, so as to the cutting bed that suspends, in favor of being returned on landwaste.
When it is implemented, the reamer of the application embodiment is arranged on to the top of BHA (BHA), reaming hole
Device rotates with drilling rod.Multiple second spiral wings 31 positioned at bottom carry out first time cutting, screw type to drilling well dog-leg
Wing can be cut and be ground to the borehole wall, also, the wing design of screw type can reduce the severe impact to the borehole wall, reach
To the uniform effect cut and ground, effective the problems such as reducing big cutting cutting grain, hole instability.It is superposed multiple
First spiral wing 21 carries out second to drilling well dog-leg and cut, and plays further reparation and supplement the first spiral wing 21 of cutting
The effect of blind area, so that well is smoother.
In the present embodiment, body 1 along its it is axially arranged have passage, top connection 2 and lower contact 3 axially through, so as to
It in providing circulation passage for drilling fluid, while can be used for circulating fluid, drilling fluid be delivered at drill bit, bottom-hole cleaning.
Wherein, top connection 2 is used for jointed rod, its inwall is provided with internal thread, is detachably connected with realizing with drilling rod.
The lower end of lower contact 3 is processed tapered respectively, and its outer wall is provided with external screw thread, is detachably connected for being realized with drill string.
Preferably, top connection 2 and lower contact 3 are wholely set with body 1, so, the reaming hole of the application embodiment
Device forms the unified entirety of a no-movable part, and so as to improve its intensity, underground work reliability greatly promotes.Together
When, the material of reamer uses modifier treatment, and hardness reaches HB280-340, and the section of top connection 2 and lower contact 3 is provided with chamfering, outside
Surface quenches, nitriding Wear-resistant Treatment, to improve its hardness.
In the present embodiment, multiple first spiral wings 21 and multiple second spiral wings 31 circumferentially partly surround
Joint 2 and the periphery wall of lower contact 3, that is to say, that multiple first spiral wings 21 and multiple second spiral wings 31 are set respectively
Put in the side of top connection 2, the opposite side of top connection 2 and lower contact 3 is not provided with wing.So, relative to expanding in the prior art
Eye device setting is circumferentially provided with for the design of wing for 360 degree, and the reamer of the application is set in top connection 2 and lower contact 3
It is equipped with the first spiral wing 21 and the second spiral wing 31, gap can be formed between the borehole wall, the gap can be advantageous to
Returned on landwaste.
As shown in Figure 1 to Figure 3, the quantity of the first spiral wing 21 and the second spiral wing 31 schematically illustrates 4,
But it should be recognized that the quantity of the first spiral wing 21 and the second spiral wing 31 is not limited to this.In practice, Ke Yigen
It is designed according to needs, for example, the quantity of the first spiral wing 21 and the second spiral wing 31 can be 3,5 or more,
The application is not construed as limiting to this.
As shown in figure 5, it is preferably carried out at one in mode, in order that the reamer of the application embodiment is with drilling rod
During rotation, realize preferably dynamic equilibrium and the effect uniformly cut, multiple first spiral wings 21 circumferentially 0 to
180 degree is distributed, circumferentially 180 to the 360 degree distribution of multiple second spiral wings 31.That is, multiple first spiral wings 21 and multiple
Second spiral wing 31 circumferentially occupies the half of top connection 2 and lower contact 3 respectively, and multiple first spiral wings 21 and multiple
Second spiral wing 31 is to be symmetrical arranged.
In addition, in order to avoid lock of tool drilling, can be by multiple first spiral wings 21 and multiple phases of second spiral wing 31
Micro- eccentric setting is used for body 1.Specifically, it can be for example cylindric that body 1, which is in the form of a column, the body 1 being in the form of a column has
The center axis deviation datum axis of datum axis, multiple first spiral wings 21 and multiple second spiral wings 31 is set, from
And multiple first spiral wings 21 and the eccentric setting of 31 opposing body of multiple second spiral wings 1.By to multiple first spirals
Wing 21 and multiple second spiral wings 31 carry out micro- eccentric setting, can expand mineshaft diameter on the basis of bit diameter
3% to 8%, and possess positive reaming and back reaming function.
As shown in Figure 1 to Figure 3, the hand of spiral of multiple first spiral wings 21 and the spiral of multiple second spiral wings 31
In the opposite direction, can specifically include：On direction from top to bottom, the hand of spiral of multiple first spiral wings 21 be it is clockwise,
The hand of spiral of multiple second spiral wings 31 is counterclockwise；Or on direction from top to bottom, multiple first spiral wings 21
The hand of spiral be counterclockwise, the hand of spiral of multiple second spiral wings 31 is clockwise.
Further, on direction from top to bottom, the thickness of multiple first spiral wings 21 gradually increases, each first spiral shell
Multiple first gauge teeths 211 are provided with the outside wall surface of the rotary knife wing 21, multiple first gauge teeths 211 are distributed in the first spiral wing
21 lower end, each first spiral wing 21 is towards being provided with multiple first cutting tooths 212 in the side wall of direction of rotation, and first
The quantity of cutting tooth 212 is more than the quantity of the first gauge teeth 211.
Likewise, on direction from top to bottom, the thickness of multiple second spiral wings 31 is gradually reduced, each second spiral
Multiple second gauge teeths 311 are provided with the outside wall surface of wing 31, multiple second gauge teeths 311 are distributed in the second spiral wing 31
Upper end, towards multiple second cutting tooths 312 are provided with the side wall of direction of rotation, second cuts each second spiral wing 31
The quantity for cutting tooth 312 is more than the quantity of the second gauge teeth 311.
It is 6 that Fig. 1 to Fig. 3, which schematically illustrates the first cutting tooth 212 and the quantity of the second cutting tooth 312, and first protects
The quantity of the gauge teeth 311 of footpath tooth 211 and second is 5.But it should be recognized that the first cutting tooth 212 and the second cutting tooth
312, and the quantity of the first gauge teeth 211 and the second gauge teeth 311 is not limited to this.In practice, can enter as needed
Row design, the application are not construed as limiting to this.
It was verified that the reamer of the application embodiment is used for the saline bed or sloughing shale strata drilling of creep properties
In, it can effectively reduce undergauge and be hampered or bit freezing risk, in horizontal well drilling, can effectively repair the borehole wall, eliminate the micro- dog in underground
Leg, micro- step, keep well unobstructed, while by machinery and hydraulic forces, destroy and Cutting Disposal, reduction well are rubbed
Moment of torsion is hindered, before setting of casing or before tripping in swell packers, it is not necessary to which reaming hole is made after special tripping in hole reaming tool is bored
Industry, ensure well safety, improve drilling efficiency.
It should be noted that in the description of the present application, term " first ", " second " etc. are only used for describing purpose and difference
Similar object, between the two and sequencing is not present, can not be interpreted as indicating or implying relative importance.In addition,
In the description of the present application, unless otherwise indicated, " multiple " are meant that two or more.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
State, many embodiments and many applications outside the example provided all will be aobvious and easy for a person skilled in the art
See.Therefore, the scope of this teaching should not determine with reference to foregoing description, but should with reference to preceding claims and this
The four corner of the equivalent that a little claims are possessed determines.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
Apply for a part for theme.
Claims (9)
1. a kind of reamer, the reamer can be connected with drill string, and be rotated under the drive of the drill string；Its feature exists
In, including：Body, the top and bottom of the body are connected to top connection and lower contact, and the outer wall of the top connection is set
Multiple first spiral wings are equipped with, the outer wall of the lower contact is provided with multiple second spiral wings, multiple first spirals
The hand of spiral of the hand of spiral of wing and multiple second spiral wings on the contrary, multiple first spiral wings circumferentially
Part surrounds the top connection, and multiple second spiral wings circumferentially partly surround the lower contact, and multiple described the
One spiral wing and multiple second spiral wings are distributed in the relative both sides of the body, multiple first spiral wings
Circumferentially distributed angle and multiple second spiral wings circumferentially distributed angle sum be 360 degree.
2. reamer as claimed in claim 1, it is characterised in that the body along its it is axially arranged have a passage, it is described on connect
Head and lower contact axially through.
3. reamer as claimed in claim 1, it is characterised in that the top connection and lower contact are integrally set with the body
Put.
4. reamer as claimed in claim 1, it is characterised in that multiple first spiral wings are circumferentially 0 to 180 degree point
Cloth, circumferentially 180 to the 360 degree distribution of multiple second spiral wings.
5. reamer as claimed in claim 1, it is characterised in that on direction from top to bottom, multiple first circular knifes
The hand of spiral of the wing is clockwise, and the hand of spiral of multiple second spiral wings is counterclockwise.
6. reamer as claimed in claim 1, it is characterised in that on direction from top to bottom, multiple first circular knifes
The hand of spiral of the wing is counterclockwise, and the hand of spiral of multiple second spiral wings is clockwise.
7. reamer as claimed in claim 1, it is characterised in that the body is in the form of a column, and it has datum axis, Duo Gesuo
State datum axis described in the center axis deviation of the first spiral wing and multiple second spiral wings to set, so as to multiple institutes
State the first spiral wing and multiple relatively described body eccentric settings of the second spiral wing.
8. reamer as claimed in claim 1, it is characterised in that on direction from top to bottom, multiple first circular knifes
The thickness of the wing gradually increases, and multiple first gauge teeths are provided with the outside wall surface of each first spiral wing, multiple described
First gauge teeth is distributed in the lower end of the first spiral wing, side wall of each first spiral wing towards direction of rotation
Multiple first cutting tooths are provided with face, the quantity of first cutting tooth is more than the quantity of first gauge teeth.
9. reamer as claimed in claim 1, it is characterised in that on direction from top to bottom, multiple second circular knifes
The thickness of the wing is gradually reduced, and multiple second gauge teeths are provided with the outside wall surface of each second spiral wing, multiple described
Second gauge teeth is distributed in the upper end of the second spiral wing, side wall of each second spiral wing towards direction of rotation
Multiple second cutting tooths are provided with face, the quantity of second cutting tooth is more than the quantity of second gauge teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011963.1A CN107780836A (en) | 2017-10-26 | 2017-10-26 | reamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011963.1A CN107780836A (en) | 2017-10-26 | 2017-10-26 | reamer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107780836A true CN107780836A (en) | 2018-03-09 |
Family
ID=61435300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711011963.1A Pending CN107780836A (en) | 2017-10-26 | 2017-10-26 | reamer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412459A (en) * | 2018-05-15 | 2018-08-17 | 成都奥尤盖茨科技发展有限公司 | T-type PDC sand cleaning devices |
| CN109555488A (en) * | 2019-01-15 | 2019-04-02 | 济源华新石油机械有限公司 | Spherical spiral wing stabilizer |
| CN112523711A (en) * | 2019-09-19 | 2021-03-19 | 中国石油化工股份有限公司 | Bellows expansion tool |
| CN112627737A (en) * | 2020-11-30 | 2021-04-09 | 安东通奥科技产业股份有限公司 | Reaming tool |
| CN113236132A (en) * | 2021-06-25 | 2021-08-10 | 核工业北京化工冶金研究院 | Eccentric double-blade ground-immersed drilling cutting tool |
| WO2022086337A1 (en) * | 2020-10-19 | 2022-04-28 | National Oilwell Varco Norway As | Improvements relating to drill strings |
| CN113236132B (en) * | 2021-06-25 | 2024-04-26 | 核工业北京化工冶金研究院 | Eccentric double-blade ground-immersed drilling cutting tool |
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