CN209260210U - A kind of protection oil well casing sacrificial anode device - Google Patents
A kind of protection oil well casing sacrificial anode device Download PDFInfo
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- CN209260210U CN209260210U CN201822042435.9U CN201822042435U CN209260210U CN 209260210 U CN209260210 U CN 209260210U CN 201822042435 U CN201822042435 U CN 201822042435U CN 209260210 U CN209260210 U CN 209260210U
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- oil well
- well casing
- sheath
- clip
- sacrificial anode
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Abstract
The utility model belongs to oil field pumping well metal and slows down corrosion technology field, and in particular to a kind of protection oil well casing sacrificial anode device.To solve the existing etch-proof technical problem of oil well casing, the utility model provides a kind of protection oil well casing sacrificial anode device, for the anticorrosion to oil well casing.A kind of oil well casing anode protector of the utility model; including sheath, the clip of conductive metal material and banding nut; clip includes the claw unit that clip seat and circle distribution have claw; the lateral surface of claw unit includes the external thread section and male cone (strobilus masculinus) close to clip seat; the medial surface of banding nut includes the inner conical surface with the matched internal thread segment of claw unit external thread section and with the cooperation of claw unit male cone (strobilus masculinus), and the cone angle of inner conical surface is slightly larger than the cone angle of male cone (strobilus masculinus).
Description
Technical field
The utility model belongs to oil field pumping well metal and slows down corrosion technology field, and in particular to a kind of protection oil well casing
Sacrificial anode device.
Background technique
Oil field mainly uses pumping unit crude oil extraction, and casing is the important component of pumping unit, and crude oil needs pass through set
Pipe is transported out from oil well, and casing corrosion can generate significant impact to pumping unit.The corrosion of casing shallow-layer is mainly that electrochemistry is rotten
Erosion, bicarbonate radical and carbanion in shallow seated groundwater can generate corrosion, Corrosion results to casing are as follows: casing is corroded part
Inner wall no corrosion phenomenon, outer wall corrosion phenomenon is serious, and corrosion product is mainly ferrous oxide and iron sulfide.
Low laying areas superficial layer soil resistivity is low, corrosivity is strong, and corrosivity perforation easily occurs for oil well casing, causes oil gas
Leakage, causes oil well that cannot normally produce, has not only caused huge economic loss but also polluted environment, and periodically well workover need to be to oil every time
Preservative treatment is done outside casing, needs to carry out derusting by sandblasting, brush antirust paint, but the method for anticorrosion treatment of this oil well casing is time-consuming
Arduously, and anticorrosion ability is limited.
Utility model content
In order to solve the etch-proof technical problem of existing oil well casing, the utility model provides a kind of protection oil well casing
Sacrificial anode device.
The technical solution of the utility model is:
A kind of protection oil well casing sacrificial anode device, including sheath, be characterized in that further include clip and
Banding nut, the clip are made by conductive metal；
The clip includes clip seat and claw unit, and claw unit is arranged in one end of clip seat, clip seat it is another
End is fixedly connected with sheath, and the claw unit includes at least three claw of circle distribution；
The lateral surface of the claw unit includes external thread section and male cone (strobilus masculinus), and the external thread section is close to clip seat；
The medial surface of the banding nut includes internal thread segment and inner conical surface, the outer spiral shell of the internal thread segment and claw unit
The male cone (strobilus masculinus) of the matching of line section, the inner conical surface and claw unit cooperates, and the cone angle of inner conical surface is greater than the cone angle of male cone (strobilus masculinus)；
The sheath, clip seat, claw unit internal diameter matched with the outer diameter of oil well casing.
Further, the sheath threaded hole of at least 3 circles, every circle at least three is provided on the sheath, it is described
Sheath threaded hole is for installing jackscrew.
Further, the sheath is anode made of magnesium alloy.
Further, the inner surface of the claw unit is provided with multiple transverse concave grooves, when being connected with each other between casing,
Increase the frictional force between claw unit and casing, makes its better clamping, be connected firmly.
Further, the inner conical surface cone angle is 13 °, and the male cone (strobilus masculinus) cone angle is 12 °.
Further, the other end with sheath of the clip seat, which are fixedly connected, is connect using screw；The clip
Through-hole is provided on seat, the end face that the sheath connect one end with clip seat is provided with threaded hole, and the screw passes through card
The threaded hole that sheath end face is pierced into after through-hole on hoop seat, clip seat is connect with sheath.
Further, the quantity of the claw is 10.
Further, the sheath is the one-time formed sheath of high temperature extrusion.
Compared with prior art, the advantages of the utility model:
1, the utility model is by the cooperation between clip and banding nut, so that Novel anode and casing metal base material are non-
Welding installation, installation is simple, and driving current is big；
2, the utility model is using anode made of magnesium alloy, and the service life is longer；
3, high temperature extrusion one-pass molding can be used in the utility model sheath, not cast, at low cost；
4, the utility model is easy to test protection potential data, and data can be completed using portable reference electrode in well head
Test；
5, oil well casing is protected using the utility model, the service life of oil well casing can be made to extend 7~10 years.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for protecting oil well casing sacrificial anode device of the utility model embodiment；
Fig. 2 is the structural schematic diagram of clip in a kind of protection oil well casing sacrificial anode device of the utility model embodiment；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is that the structure of banding nut in a kind of protection oil well casing sacrificial anode device of the utility model embodiment is shown
It is intended to；
Fig. 5 is the sectional view along A-A of Fig. 4；
Description of symbols:
1- sheath, 11- sheath threaded hole, 2- clip, 21- clip seat, 22- claw unit, 221- claw,
222- male cone (strobilus masculinus), 223- external thread section, 224- transverse concave groove, 3- banding nut, 311- internal thread segment, 312- inner conical surface, 4- spiral shell
Nail.
Specific embodiment
It elaborates below in conjunction with attached drawing to the utility model.
As shown in figure 1, figure 2, figure 3, figure 4 and figure 5, one of the present embodiment protects oil well casing sacrificial anode device, packet
It includes sheath 1, include clip 2, banding nut 3 and screw 4, clip 2 is made by conductive metal, the sheath in the present embodiment
1 uses extrusion forming of extruder of 2000T, and sheath 1 is anode made of magnesium alloy.
Clip 2 includes clip seat 21 and claw unit 22, and one end of clip seat 21, the present embodiment is arranged in claw unit 22
In, the other end of clip seat 21 is fixedly connected with sheath 1 to be connect using screw 4, and through-hole is provided in clip seat 21, is managed
Shape anode 1 is provided with threaded hole with the end face that clip seat 21 connect one end, and screw 4 pierces into pipe after passing through the through-hole in clip seat 21
Clip seat 21 is connect in other embodiments by the threaded hole of 1 end face of shape anode with sheath 1, the other end of clip seat 21 with
Sheath 1 is fixedly connected；In the present embodiment, claw unit 22 has 10 claws 221 including circle distribution, other realities
It applies in example, as long as claw unit 22 includes at least three claw 221 of circle distribution, is arranged according to specific demand；This reality
It applies in example, the inner surface of claw unit 22 is provided with multiple transverse concave grooves 224, increases frictional force, so that energy between oil well casing
Enough installations are close, and are able to achieve conduction, can also be not provided in other embodiments；The lateral surface of claw unit 22 includes external screw thread
Section 223 and male cone (strobilus masculinus) 222, external thread section 223 is close to clip seat 21；The medial surface of banding nut 3 includes internal thread segment 311 and interior
The conical surface 312, internal thread segment 311 are matched with the external thread section 223 of claw unit 22, the outer cone of inner conical surface 312 and claw unit 22
Face 222 cooperates, and in the present embodiment, 312 cone angle of inner conical surface is 13 °, and 222 cone angle of male cone (strobilus masculinus) is 12 °, in other embodiments, guarantees
The cone angle of inner conical surface 312 is greater than the cone angle of male cone (strobilus masculinus) 222；Sheath 1, clip seat 21, the internal diameter of claw unit 22 are equal
It is matched with the outer diameter of oil well casing.
In the present embodiment, the sheath threaded hole 11 of 3 circles, every 3, circle, sheath spiral shell are provided on sheath 1
Pit 11 is for installing jackscrew；In other embodiments, the sheath threaded hole 11 of setting no less than 3 circles, no less than 3, every circle
?.
For convenience of installation, in the present embodiment, outer-hexagonal fixing card is equipped in the clip seat 21 of banding nut 3 and clip 2
Mouthful.
One of the present embodiment protects oil well casing sacrificial anode device as follows using installation method:
1, the pipeline being put on bracket dismantles the packaging at ends screw, and the sheath 1 of finished product is inserted in outside pipeline
Sheath 1 is fixed to pipe end as far as possible according to previous experiences by wall, the erosion resistant coating for destroying pipeline of trying not in principle
Head away from screw thread about 100mm at because threaded connection place is more perishable than pipeline other positions；
2, rationally, simple installation does not need mobile electricity for the protection oil well casing sacrificial anode device design of the utility model
After determining position of the sheath 1 on pipeline, the clip seat of clip 2 is blocked with first special tube pliers for source and electric welding machine
At the fixed bayonet of 21 outer-hexagonals, in addition a pipe wrench is blocked at 3 outer-hexagonal bayonet of banding nut, rotates clockwise pipe wrench, until
Turn motionless, torque is about 80 to 100Nm, can also be estimated, and the inner surface on claw unit 22 blocks or sting tight pipeline, to guarantee
The continuity of anodal closure.
3, after sheath 1 and pipeline fix fastening, 1 portraitlandscape of sheath after installation cannot loosen, and use general-purpose
Table test, multimeter get to resistance minimum shelves, and one of test pencil is contacted with sheath 1, another test pencil and claw list
The external thread section 223 of member 22 contacts, and resistance value should be less than 0.3 Ω, and it is qualified to connect.
If the soil salt content that development zone is detected in Sa is between 0.57% to 1.64%, casing above earth potential is defeated by-
Electrochemical corrosion easily occurs for 0.55V, casing.For oil recovery factory part drilling well block, because of low lying ground, shallow stratum corrosivity ratio
Stronger actual conditions use the work of sacrificial anode from ground to underground 120 meters of serious region of shallow stratum casing corrosion
Skill material is magnalium kirsite, outer diameter Φ 165mm, and internal diameter 142 ± 0.25mm of Φ, length L620mm, which connect in casing
Magnesium multicomponent alloy ring is put at hoop as anode, and processing of rust removing, surface roughness processing, priming paint finishing coat are carried out to sleeve surface
Brush construction.By electrolytic anode after casing is gone into the well, delay casing corrosion.
Claims (8)
1. a kind of protection oil well casing sacrificial anode device, including sheath (1), it is characterised in that: further include clip (2) and
Banding nut (3), the clip (2) are made by conductive metal；
The clip (2) includes clip seat (21) and claw unit (22), and claw unit (22) is arranged the one of clip seat (21)
End, the other end of clip seat (21) is fixedly connected with sheath (1), the claw unit (22) include circle distribution at least
3 claws (221)；
The lateral surface of the claw unit (22) includes external thread section (223) and male cone (strobilus masculinus) (222), the external thread section (223)
Close to clip seat (21)；
The medial surface of the banding nut (3) includes internal thread segment (311) and inner conical surface (312), the internal thread segment (311) with
The external thread section (223) of claw unit (22) matches, and the inner conical surface (312) and the male cone (strobilus masculinus) (222) of claw unit (22) are matched
It closes, and the cone angle of inner conical surface (312) is greater than the cone angle of male cone (strobilus masculinus) (222)；
The sheath (1), clip seat (21), claw unit (22) internal diameter matched with the outer diameter of oil well casing.
2. a kind of protection oil well casing sacrificial anode device according to claim 1, it is characterised in that:
The sheath threaded hole (11) of at least 3 circles, every circle at least three, the tubular male are provided on the sheath (1)
Pole threaded hole (11) is for installing jackscrew.
3. a kind of protection oil well casing sacrificial anode device according to claim 1 or 2, it is characterised in that: the tubulose
Anode (1) is anode made of magnesium alloy.
4. a kind of protection oil well casing sacrificial anode device according to claim 3, it is characterised in that:
The inner surface of the claw unit (22) is provided with multiple transverse concave grooves (224).
5. a kind of protection oil well casing sacrificial anode device according to claim 4, it is characterised in that:
Inner conical surface (312) cone angle is 13 °, and male cone (strobilus masculinus) (222) cone angle is 12 °.
6. a kind of protection oil well casing sacrificial anode device according to claim 5, it is characterised in that:
The other end of the clip seat (21) is fixedly connected with sheath (1) to be connect using screw (4)；The clip seat
(21) through-hole is provided on, the sheath (1) is provided with threaded hole, the spiral shell with the end face that clip seat (21) connect one end
Nail (4) pierces into the threaded hole of sheath (1) end face after the through-hole on clip seat (21), by clip seat (21) and tubular male
Pole (1) connection.
7. a kind of protection oil well casing sacrificial anode device according to claim 6, it is characterised in that:
The quantity of the claw (221) is 10.
8. a kind of protection oil well casing sacrificial anode device according to claim 6, it is characterised in that: the sheath
It (1) is the one-time formed sheath of high temperature extrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822042435.9U CN209260210U (en) | 2018-12-06 | 2018-12-06 | A kind of protection oil well casing sacrificial anode device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822042435.9U CN209260210U (en) | 2018-12-06 | 2018-12-06 | A kind of protection oil well casing sacrificial anode device |
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| Publication Number | Publication Date |
|---|---|
| CN209260210U true CN209260210U (en) | 2019-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822042435.9U Active CN209260210U (en) | 2018-12-06 | 2018-12-06 | A kind of protection oil well casing sacrificial anode device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396694A (en) * | 2019-08-08 | 2019-11-01 | 中国石油天然气股份有限公司 | A kind of fixed device and method of Casing Failure sacrificial anode |
| CN115247265A (en) * | 2021-04-27 | 2022-10-28 | 中国石油化工股份有限公司 | Oil pipe of cast high-temperature-resistant sacrificial anode and preparation method thereof |
-
2018
- 2018-12-06 CN CN201822042435.9U patent/CN209260210U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396694A (en) * | 2019-08-08 | 2019-11-01 | 中国石油天然气股份有限公司 | A kind of fixed device and method of Casing Failure sacrificial anode |
| CN115247265A (en) * | 2021-04-27 | 2022-10-28 | 中国石油化工股份有限公司 | Oil pipe of cast high-temperature-resistant sacrificial anode and preparation method thereof |
| CN115247265B (en) * | 2021-04-27 | 2024-02-13 | 中国石油化工股份有限公司 | Cast high-temperature-resistant oil pipe with sacrificial anode and preparation method thereof |
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