CN206737849U - A kind of sleeve outer wall anti-corrosion rigid centralizer - Google Patents
A kind of sleeve outer wall anti-corrosion rigid centralizer Download PDFInfo
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- CN206737849U CN206737849U CN201720452128.0U CN201720452128U CN206737849U CN 206737849 U CN206737849 U CN 206737849U CN 201720452128 U CN201720452128 U CN 201720452128U CN 206737849 U CN206737849 U CN 206737849U
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Abstract
The utility model provides a kind of sleeve outer wall anti-corrosion rigid centralizer, including anti-corrosion cylinder, upper spiral righting clamping termination and lower spiral righting clamping termination, described upper spiral righting clamping termination and lower spiral righting clamping termination is respectively sleeved on the outer wall of two ends of anti-corrosion cylinder, and anti-corrosion cylinder is made of composite sacrificial anode material.Both the centralizer of cementing operation middle sleeve had been can guarantee that, has improved cementing quality, and can effectively delays casing corrosion after operation, increases Oil/gas Well service life.By carrying out Optimal Structure Designing to centralizer, effective clamping fastener effect to anti-corrosion material is realized, centralizer and anti-corrosion material are combined, form sleeve outer wall anti-corrosion rigid centralizer.
Description
Technical field
The utility model belongs to oil field development well cementing operation technical field, and in particular to a kind of sleeve outer wall anti-corrosion rigidity
Centralizer.
Background technology
For oil field production casing because stratum corrosive environment is complicated, sleeve pipe damage phenomenon is serious.Covered caused by etching problem
Damage well quantity increases year by year, and causes huge economic loss, has a strong impact on that oil field normally produces, with oil and gas exploitation
Amount expands day by day, and the corrosion and protection of oil gas field well casing are also increasingly taken seriously.Research shows, beyond oil well casing corrosion
Based on corrosion.Because set damage reason is mainly caused by corrosion：（1）Production casing long period of soaking is in high salinity underground water；
（2）Under high-temperature and high-pressure conditions, H2S、CO2, highly mineralized formation brines and underdeposit corrosion become the major incentive that set damage occurs.
At present, using using mostly, corrosion-inhibiting coating completely cuts off external casing corrosion medium and sacrificial anode polarizes to sleeve pipe in oil field
Protective current both aseptic technics combination, i.e. epoxy Cold winding band zincification sacrificial anode joint anti-corrosion are provided.But the technology is present
The defects of corrosion-inhibiting coating and sacrificial anode, coating and sacrificial anode easy to fall off are easily scratched when scene transport or lifting, causes anti-corrosion
It is ineffective.
Utility model content
The purpose of this utility model is to overcome existing sleeve outer wall corrosion-inhibiting coating easily to be drawn when scene transport or lifting be present
The problems such as hindering corrosion-inhibiting coating and sacrificial anode, coating and sacrificial anode easy to fall off, while ensure the placed in the middle of cementing operation middle sleeve
Degree, cementing quality is improved, and can effectively delays casing corrosion after operation, increases Oil/gas Well service life.
Therefore, the utility model provides a kind of sleeve outer wall anti-corrosion rigid centralizer, including anti-corrosion cylinder, upper spiral
Righting clamps termination and lower spiral righting clamping termination, described upper spiral righting clamping termination and lower spiral righting clamping termination
It is respectively sleeved on the outer wall of two ends of anti-corrosion cylinder, anti-corrosion cylinder is made of composite sacrificial anode material.
The upper spiral righting clamping termination is identical with the structure of lower spiral righting clamping termination, is by left the half of arc
Spiral centralizer body and right semi-spiral centralizer body engage the cylinder-like structure to be formed；
One end of the left semi-spiral centralizer body and right semi-spiral centralizer body plugs together connection, other end by multiple screws
It is flexibly connected by multiple hinges, one end of hinge is connected to bearing pin, and bearing pin is arranged on left semi-spiral centralizer body or right semi-spiral
On centralizer body, left semi-spiral centralizer body and right semi-spiral centralizer body pass through 180 ° of hinge folding.
Circumferentially arranged with arc boss, left semi-spiral centralizer body and right half spiral shell on the outer wall of two ends of anti-corrosion cylinder
The inwall of rotation centralizer body circumferentially offers arc groove, and upper spiral righting clamping termination and lower spiral righting clamping termination press from both sides respectively
Hold in anti-corrosion barrel end, arc groove engages with arc boss.
A plurality of helicla flute, and spiral shell are offered on the upper spiral righting clamping termination and lower spiral righting clamping termination outer wall
Spin slot is opening wide portion.
Two ends of the anti-corrosion cylinder offer two relative breach.
Groove is offered vertically on the outer wall of the anti-corrosion cylinder.
The beneficial effects of the utility model：This sleeve outer wall anti-corrosion rigid centralizer provided by the utility model and its
Installation application, both can guarantee that the centralizer of cementing operation middle sleeve, improve cementing quality, and and can effectively delays sleeve pipe after operation
Corrosion, increase Oil/gas Well service life.By carrying out Optimal Structure Designing to centralizer, effective clamping to anti-corrosion material is realized
Fastening effect, centralizer and anti-corrosion material are combined, form sleeve outer wall anti-corrosion rigid centralizer.
The utility model is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of sleeve outer wall anti-corrosion rigid centralizer.
Fig. 2 is the structural representation of upper spiral righting clamping termination or lower spiral righting clamping termination.
Fig. 3 is the structural representation of anti-corrosion cylinder.
Description of reference numerals：1st, upper spiral righting clamping termination；2nd, hinge；3rd, bearing pin；4th, sleeve pipe；5th, anti-corrosion cylinder；6、
Lower spiral righting clamps termination；7th, screw；8th, left semi-spiral centralizer body；9th, right semi-spiral centralizer body；10th, breach.
Embodiment
Embodiment 1：
In order to overcome existing sleeve outer wall corrosion-inhibiting coating easily scratched when scene transport or lifting be present corrosion-inhibiting coating with it is sacrificial
The problems such as domestic animal anode, coating and sacrificial anode easy to fall off, present embodiments provide a kind of sleeve outer wall anti-corrosion as shown in Figure 1 and use
Rigid centralizer, including anti-corrosion cylinder 5, upper spiral righting clamping termination 1 and lower spiral righting clamping termination 6, described upper spiral shell
Rotation righting clamping termination 1 and lower spiral righting clamping termination 6 are respectively sleeved on the outer wall of 5 two ends of anti-corrosion cylinder, anti-corrosion
Cylinder 5 is made of composite sacrificial anode material.
It should be noted that anti-corrosion cylinder 5 is made of composite sacrificial anode material, composite sacrificial anode material has electricity
The features such as chemical property is excellent, and driving current potential is big, current efficiency is high, and anti-corrosion protection effect is good.Composite sacrificial anode material can city
Purchase, such as combined type magnesium zinc covering sacrificial anode material.
The sleeve outer wall anti-corrosion rigid centralizer that the present embodiment provides clamps termination 1 and lower spiral by upper spiral righting
Anti-corrosion cylinder 5 is fastened on the outer wall of sleeve pipe 4 by righting clamping termination 6, solves the defects of coating and sacrificial anode easy to fall off；And
The centralizer both can guarantee that the centralizer of cementing operation middle sleeve, improve cementing quality, and and can effectively delays sleeve pipe after operation
Corrosion, increase Oil/gas Well service life.
Embodiment 2：
On the basis of embodiment 1, as shown in Fig. 2 the upper spiral righting clamping termination 1 and lower spiral righting bare terminal end
First 6 structure is identical, is that the cylindric knot formed is engaged by the left semi-spiral centralizer body 8 and right semi-spiral centralizer body 9 of arc
Structure；One end of the left semi-spiral centralizer body 8 and right semi-spiral centralizer body 9 plugs together connection by multiple screws 7, and other end is led to
Cross multiple hinges 2 to be flexibly connected, one end of hinge 2 is connected to bearing pin 3, and bearing pin 3 is arranged on left semi-spiral centralizer body 8 or right half spiral shell
Revolve on centralizer body 9, left semi-spiral centralizer body 8 and right semi-spiral centralizer body 9 pass through 180 ° of 2 folding of hinge.
It should be noted that upper spiral righting termination 1 is by left semi-spiral centralizer body 8, right semi-spiral centralizer body 9, leaf of hinge 2
Being formed with bearing pin 3, left semi-spiral centralizer body 8 is process with right semi-spiral centralizer body 9 by same complete spiral centralizer body,
By processing the vertical curve in the axial direction of a relative 5mm and 5mm oblique line on complete spiral centralizer body, by spiral shell
Rotation centralizer body is divided into left semi-spiral centralizer body 8 and right semi-spiral centralizer body 9, and the end face of the vertical end of left semi-spiral centralizer body 8 is opened
There are three hinge grooves, oblique end face offers three screw holes, three hinges are provided with the vertical end of right semi-spiral centralizer body 9
Groove, oblique end face are machined with three screw holes, and during installation, three leaf of hinge 2 help left semi-spiral centralizer body 8 with right semi-spiral
Roman 9 is linked together by bearing pin 3, and the mounting hole top of bearing pin 3 is welded, left semi-spiral centralizer body 8 and right semi-spiral righting
Body 9 can realize 180 ° of folding, and left semi-spiral centralizer body 8 is connected and circularizes entirety by screw 7 with right semi-spiral centralizer body 9, lead to
Cross the fastening effect of screw 7, the clamping action of spiral righting termination 1 in realization；Upper spiral righting termination 1 and lower spiral righting end
First 2 structure function all same, it is interchangeable.
As shown in Fig. 2 the expansion plane of left semi-spiral centralizer body 8, right semi-spiral centralizer body 9 is right-angled trapezium, both of which
Curved, cocker is combined into cylindrical shape, and anti-corrosion cylinder 5 is clamped on sleeve pipe 4.
Embodiment 3：
On the basis of embodiment 2, as shown in figure 1, circumferentially arranged with arc on the outer wall of 5 two ends of anti-corrosion cylinder
The inwall of shape boss, left semi-spiral centralizer body 8 and right semi-spiral centralizer body 9 circumferentially offers arc groove, upper spiral righting folder
Termination 1 and lower spiral righting clamping termination 6 are held when being clamped in anti-corrosion 5 end of cylinder respectively, arc groove engages with arc boss.It is left
The arc that non-through arc groove on the inwall of semi-spiral centralizer body 8 and right semi-spiral centralizer body 9 blocks anti-corrosion body 5 is convex
Platform, spacing and clamping is carried out to anti-corrosion body 5.
Embodiment 4：
On the basis of embodiment 2, on the upper spiral righting clamping termination 1 and the lower spiral righting clamping outer wall of termination 6
A plurality of helicla flute is offered, and helicla flute is opening wide portion.The helicla flute of opening wide portion can ensure cementing concrete
Slurry fluid smoothly enters helicla flute, forms high-speed screw stream, strengthens the turbulent condition of cementing slurry, improves cementing quality.
It should be noted that upper spiral righting termination 1 is by left semi-spiral centralizer body 8, right semi-spiral centralizer body 9, leaf of hinge 2
Being formed with bearing pin 3, left semi-spiral centralizer body 8 is process with right semi-spiral centralizer body 9 by same complete spiral centralizer body,
8 equally distributed helicla flutes are shared on the spiral centralizer body, by to scroll on process 5mm edge respectively
The vertical slots of axis direction and the 5mm helicla flute along scroll center line, spiral centralizer body is divided into left semi-spiral centralizer body 8
With right semi-spiral centralizer body 9, non-through arc groove is provided with the inwall of left semi-spiral centralizer body 8, along scroll in vertical end
Section is radially being provided with three hinge grooves, is radially machined with three screw holes on spiral end along the tangent line of scroll bottom, right
It is provided with non-through arc groove on the inwall of semi-spiral centralizer body 9, three conjunctions is radially being provided with along scroll section in vertical end
Slot, three screw holes are radially machined with along the tangent line of scroll bottom on spiral end.During installation, three leaf of hinge 2 are by a left side
Semi-spiral centralizer body 8 is linked together with right semi-spiral centralizer body 9 by bearing pin 3, and the mounting hole top of bearing pin 3 is welded, and left half
Spiral centralizer body 8 and right semi-spiral centralizer body 9 can realize 180 ° of folding, and screw 7 is by left semi-spiral centralizer body 8 and right semi-spiral
The connection of centralizer body 9 circularizes entirety, by the fastening effect of screw 7, the clamping action of spiral righting termination 1 in realization；Upper spiral shell
Righting termination 1 and the lower structure function all same of spiral righting termination 2 are revolved, it is interchangeable.
Embodiment 5：
On the basis of embodiment 1, as shown in figure 3, two ends of the anti-corrosion cylinder 5 offer two it is relative
Breach 10, opening up for breach 10 makes the internal diameter contracts last in order that the upper spiral righting assembled clamps termination 1, so that anti-corrosion
The internal diameter contracts last of body 5, the locking of anti-corrosion body 5 is on by the outer wall of protection sleeve pipe 4, until the introversion of anti-corrosion body 5
Face is fitted in by the outer wall of protection sleeve pipe 4 completely.
Groove is offered vertically on the outer wall of the anti-corrosion cylinder 5.During the internal diameter contracts last of anti-corrosion body 5, axis
The 5mm grooves in direction narrow, and for the locking of anti-corrosion body 5 on by the outer wall of protection sleeve pipe 4, groove is in order to ensure anti-corrosion cylinder 5
Radial contraction.
Embodiment 6：
A kind of installation application of sleeve outer wall anti-corrosion rigid centralizer is present embodiments provided, sleeve outer wall anti-corrosion is with just
Property centralizer when operation field is installed, anti-corrosion cylinder 5 is enclosed on the outer wall of sleeve pipe 4, then by upper spiral righting clamp termination 1
It is enclosed on lower spiral righting clamping termination 6 on two ends of anti-corrosion cylinder 5, the arc boss on anti-corrosion cylinder 5 and left half spiral shell
The arc groove engaging of centralizer body 8 and right semi-spiral centralizer body 9 is revolved, left semi-spiral centralizer body 8 and right semi-spiral centralizer body 9 pass through conjunction
Page 2 and screw 7 clamp locking anti-corrosion cylinder 5, until the negative camber of anti-corrosion cylinder 5 is fitted on the outer wall of sleeve pipe 4 completely, complete set
The installation of pipe outer wall anti-corrosion rigid centralizer.
When operation field is installed, the anti-corrosion body 5 of cylinder is enclosed on by the outer wall of protection sleeve pipe 4 vertically, on
Spiral righting accommodates the arc boss position that termination 1 is fastened on the upper end of anti-corrosion body 5, left semi-spiral centralizer body 8 and right semi-spiral
Non-through arc groove on the inwall of centralizer body 9 blocks the arc boss of anti-corrosion body 5, carries out spacing and accommodates, and screw 7 will
Left semi-spiral centralizer body 8 is connected with right semi-spiral centralizer body 9 and circularizes entirety, by the fastening effect of screw 7, makes the upper of assembling
Spiral righting accommodates the internal diameter contracts last of termination 1, so that the internal diameter contracts last of anti-corrosion body 5, the locking of anti-corrosion body 5
On by the outer wall of protection sleeve pipe 4, until the negative camber of anti-corrosion body 5 is fitted in by the outer wall of protection sleeve pipe 4 completely.
Exemplified as above is only for example, not forming to the scope of protection of the utility model to of the present utility model
Limitation, it is every to be belonged to the same or analogous design of the utility model within the scope of protection of the utility model.The present embodiment
The part and the well-known components and common structure or conventional means of the structure category industry not described in detail, are not chatted one by one here
State.
Claims (6)
- A kind of 1. sleeve outer wall anti-corrosion rigid centralizer, it is characterised in that：Including anti-corrosion cylinder（5）, upper spiral righting clamping Termination（1）Termination is clamped with lower spiral righting（6）, described upper spiral righting clamping termination（1）With lower spiral righting bare terminal end Head（6）It is respectively sleeved at anti-corrosion cylinder（5）On the outer wall of two ends, anti-corrosion cylinder（5）Using composite sacrificial anode material system Into.
- 2. sleeve outer wall anti-corrosion rigid centralizer as claimed in claim 1, it is characterised in that：The upper spiral righting clamping Termination（1）Termination is clamped with lower spiral righting（6）Structure it is identical, be the left semi-spiral centralizer body by arc（8）With right half Spiral centralizer body（9）Engage the cylinder-like structure formed；The left semi-spiral centralizer body（8）With right semi-spiral centralizer body（9）One end pass through multiple screws（7）Connection is plugged together, separately Outer one end passes through multiple hinges（2）It is flexibly connected, hinge（2）One end be connected to bearing pin（3）, bearing pin（3）Installed in left half spiral shell Revolve centralizer body（8）Or right semi-spiral centralizer body（9）On, left semi-spiral centralizer body（8）With right semi-spiral centralizer body（9）Pass through hinge （2）180 ° of folding.
- 3. sleeve outer wall anti-corrosion rigid centralizer as claimed in claim 2, it is characterised in that：The anti-corrosion cylinder（5）Two Circumferentially arranged with arc boss, left semi-spiral centralizer body on the outer wall of individual end（8）With right semi-spiral centralizer body（9）Inwall edge Arc groove is circumferentially offered, upper spiral righting clamps termination（1）Termination is clamped with lower spiral righting（6）Anti-corrosion cylinder is clamped in respectively Body（5）During end, arc groove engages with arc boss.
- 4. sleeve outer wall anti-corrosion rigid centralizer as claimed in claim 2, it is characterised in that：The upper spiral righting clamping Termination（1）Termination is clamped with lower spiral righting（6）A plurality of helicla flute is offered on outer wall, and helicla flute is opening wide portion.
- 5. sleeve outer wall anti-corrosion rigid centralizer as claimed in claim 1, it is characterised in that：The anti-corrosion cylinder（5）'s Two ends offer two relative breach（10）.
- 6. the sleeve outer wall anti-corrosion rigid centralizer as described in claim 1 or 5, it is characterised in that：The anti-corrosion cylinder（5） Outer wall on offer groove vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720452128.0U CN206737849U (en) | 2017-04-27 | 2017-04-27 | A kind of sleeve outer wall anti-corrosion rigid centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720452128.0U CN206737849U (en) | 2017-04-27 | 2017-04-27 | A kind of sleeve outer wall anti-corrosion rigid centralizer |
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| Publication Number | Publication Date |
|---|---|
| CN206737849U true CN206737849U (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720452128.0U Active CN206737849U (en) | 2017-04-27 | 2017-04-27 | A kind of sleeve outer wall anti-corrosion rigid centralizer |
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| CN (1) | CN206737849U (en) |
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- 2017-04-27 CN CN201720452128.0U patent/CN206737849U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201112 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710016 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |
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| TR01 | Transfer of patent right |