CN104563906A - Combined-type sucker rod centralizer - Google Patents
Combined-type sucker rod centralizer Download PDFInfo
- Publication number
- CN104563906A CN104563906A CN201410822163.8A CN201410822163A CN104563906A CN 104563906 A CN104563906 A CN 104563906A CN 201410822163 A CN201410822163 A CN 201410822163A CN 104563906 A CN104563906 A CN 104563906A
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- CN
- China
- Prior art keywords
- centralizer body
- sacrificial anode
- combined type
- centering device
- oil pumping
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a combined-type sucker rod centralizer which comprises a columnar centralizer body, wherein the upper end of the centralizer body is provided with a threaded hole for connection; the lower end of the centralizer body is provided with a lower connector; the exterior of the centralizer body is fixedly sleeved by a permanent magnet, a sacrificial anode and a centralizing sleeve. According to the combined-type sucker rod centralizer, the external circumferential surface of the centralizer body is provided with the plastic centralizing sleeve, the magnesium sacrificial anode and the permanent magnet, so that the effects of performing centralization, corrosion prevention and scale prevention on a pumping pipe string and preventing a pipe wall and a sucker rod from being subjected to wax precipitation are achieved.
Description
Technical field
The present invention relates to a kind of oil pumping rod centering device of technical field of oil production engineering, particularly have compared with high-wearing feature and effectively can prevent the combined type oil pumping rod centering device of the eccentric wear of oil pipe and rod string, anticorrosion, antiscale, Wax proofing.
Background technology
At present, well liquid not only in oil-field thick-oil, thin oil, high solidifying oily Development and Production is because the physicochemical characteristics such as High water cut, high salinity can cause oil well rod and tube partial-wear, corrosion and scaling serious, and the unreasonable of casing programme also can cause rod and tube partial-wear (rod string and oil pipe eccentric wear).Rod string will be caused when rod string eccentric wear, seriously corroded to rupture, cause pump detection and workover.In addition, rod tube wax deposition easily causes oil pumper, sucker rod, oil well pump lifting difficulty, thus causes oil well output reduction even cannot exploit and easily cause safety and environmental protection accident.Although existing oil pumping rod centering device possesses the effect of certain anti-rod and tube partial-wear, itself do not possess initiatively anticorrosion, antiscale, Wax proofing function.This phenomenon of rod and tube partial-wear caused by down-hole many factors, only unilateral from the angle how improving friction pair abrasion resistance to avoid rod and tube partial-wear, after all, down-hole liquid wax deposition and also can cause the aggravation of rod and tube partial-wear situation to the corrosion and scaling of rod string.
Summary of the invention
In order to overcome rod and tube partial-wear, the problem of the corrosion and scaling aggravation rod and tube partial-wear of the wax deposition of down-hole liquid and rod string, the invention provides a kind of combined type oil pumping rod centering device, has comparatively high-wearing feature, can make that rod string is anticorrosion, antiscale, Wax proofing.
The technical solution adopted for the present invention to solve the technical problems is: a kind of combined type oil pumping rod centering device, comprise the centralizer body of column, the upper end of centralizer body is provided with the screwed hole for connecting, the lower end of centralizer body is provided with lower contact, and centralizer body fixed sleeves is provided with permanent magnet, sacrificial anode and supporting positive cover.
Along the axis direction of centralizer body, permanent magnet, sacrificial anode and supporting positive cover set gradually from the top down, permanent magnet comprises multiple Nd-Fe-B permanent magnetic rings that the axis direction along centralizer body is arranged in order, and is provided with a spacer ring between adjacent two described Nd-Fe-B permanent magnetic rings.
Each described Nd-Fe-B permanent magnetic ring is docked by two semiorbicular permanent magnetism semi-rings and forms.
The internal diameter of spacer ring equals the internal diameter of described Nd-Fe-B permanent magnetic ring, and the external diameter of spacer ring equals the external diameter of described Nd-Fe-B permanent magnetic ring.
The outside wall surface at the middle part of centralizer body is provided with flange, and described combined type oil pumping rod centering device also comprises sheath, and the top of sheath is connected with the threaded upper ends of centralizer body by internal thread; The bottom of sheath is sheathed on outside permanent magnet and spacer ring; The external diameter of sheath equals the external diameter of flange, and the external diameter of flange is less than the external diameter of supporting positive cover, and the lower end abutment of sheath is on flange.
Sacrificial anode is magnesium sacrificial anode, and sacrificial anode is arranged at the outside wall surface of the centralizer body between flange and supporting positive cover, and along on the axis direction of centralizer body, the length of sacrificial anode equals the distance between flange and supporting positive cover.
Along the radial direction of centralizer body, the thickness of sacrificial anode is 2.5 millimeters to 3.5 millimeters; Along the axis direction of centralizer body, the length of sacrificial anode is 15 millimeters to 20 millimeters.
The internal face of sacrificial anode is arranged at intervals with bulge loop, and the outside wall surface of centralizer body is provided with the groove matched with described bulge loop.
Supporting positive cover is plastics supporting positive cover, and along the radial direction of centralizer body, the thickness of supporting positive cover is 3 millimeters to 5 millimeters; Along the axis direction of centralizer body, the length of supporting positive cover is 30 millimeters to 40 millimeters.
The material of supporting positive cover is engineering plastics.
The invention has the beneficial effects as follows, by arranging described plastics supporting positive cover, described magnesium sacrificial anode and described permanent magnet on the outer circumference surface of described centralizer body, reach and righting, anticorrosion and antiscale are carried out to pumping pipe string, and prevent the effect of tube wall and sucker rod wax deposition.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention will be further described.
Fig. 1 is structural representation of the present invention.
Description of reference numerals: 1. supporting positive cover, 2. sacrificial anode, 3. centralizer body, 31. flanges, 4. permanent magnet, 5. spacer ring, 6. sheath.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
As shown in Figure 1, the present invention proposes a kind of combined type oil pumping rod centering device, comprise the centralizer body 3 of column, the upper end of centralizer body 3 is provided with the screwed hole for connecting, the lower end of centralizer body 3 is provided with lower contact, centralizer body 3 fixed sleeves is provided with permanent magnet 4, sacrificial anode 2 and supporting positive cover 1, and the diameter of supporting positive cover 1 is greater than the diameter of sacrificial anode 2 and permanent magnet 4.
Rod string is general all to pump in oil pipe endoporus with the frequency of 3-12 punching beat/min, the many factors such as unreasonable of High water cut, high salinity and casing programme, the equal outer circumference surface of rod string that can cause contacts with oil pipe endoporus, and continual reciprocating friction causes the wearing and tearing of rod collar to cause rod string disconnected de-at last.Described combined type oil pumping rod centering device arranges supporting positive cover 1 on the outer circumference surface of centralizer body 3, rod string is played to the effect of righting, thus effectively protects the eccentric wear of rod string body.
In addition, when after rod string G.I.H, a new macroscopical battery is formed under sacrificial anode 2 in rod string and described combined type oil pumping rod centering device is in same electrolyte environment, sacrificial anode 2 is formed as the anode of new battery, and rod string is formed as the negative electrode of new battery, a cathode current is provided by electrolyte to rod string from the sacrificial anode 2 of described combined type oil pumping rod centering device, make rod string as cathodic polarization and continuous down-hole liquid around rod string provides electronics, make down-hole liquid polarization and activate.Along with the continuous flowing of electric current, in described combined type oil pumping rod centering device, sacrificial anode 2 material is constantly consumed.A large amount of metals electrolysis in water in sacrificial anode 2 forms a large amount of hydroxide, these hydroxide are not only good corrosion inhibiter in neutral solution, and there is very strong suction-operated, the uniform film of one deck can be formed after these hydroxide are adsorbed in rod string, thus prevent the fouling of rod string body.For rod string, corrosion and fouling two processes exist simultaneously, and mutually promote, and mutually restrict.In the dirty inorganic salts of one-tenth, the generation of oxidizing corrosion product, also has into the existence of the materials such as dirty inorganic salts, silt particle, crude oil.After the described combined type oil pumping rod centering device of use, corrosion product is as FeO, Fe
3o
4, FeS etc. growing amount can greatly reduce, the diaphragm fineness of rod string is higher, becomes dirty inorganic salts, silt particle etc. also more difficult at rod string surface deposition, and like this, the possibility of fouling also can reduce greatly.Driven mechanics viewpoint, under the effect of electric field, micromeritics can not according to distinctive sequential arrangement, cannot the crystal of formation rule, crystal is distorted, makes its structure become loose shape, prevent growth and the deposition of micromeritics, therefore, inorganic salts CaCO
3, CaSO
4etc. being difficult to be formed micromeritics, be namely difficult to into dirt.
Down-hole liquid with certain flow rate by after the permanent magnet 4 in described combined type oil pumping rod centering device, because the paraffin in down-hole liquid is a kind of diamagnetic substance, molecule itself does not have magnetic moment, when down-hole liquid flows through the high energy magnetic field of special magnetic circuit, paraffin molecule can by flash magnetization, electron spin amount in paraffin molecule increases, tracks changes, create the leap of energy, the physical property of crude oil is consequently made to change within the regular hour, paraffin molecule produces induced magnetic moment, simultaneously around magnetic line of force generation precession.Crude oil is made to overcome magnetic field force acting, internal energy of molecular increases, and the precessional evlocity of paraffin molecule is close, along the magnetic line of force direction arrangement, adjacent molecule due to orientation identical, polarity is identical, mutual repulsion, just not easily be combined into network-like wax more brilliant, thus brilliant being suspended in state in small, broken bits in oil stream of wax is pulled away, reach the object preventing tube wall and sucker rod wax deposition.
In a feasible embodiment, along the axis direction of centralizer body 3, permanent magnet 4, sacrificial anode 2 and supporting positive cover 1 set gradually from the top down, permanent magnet 4 comprises multiple Nd-Fe-B permanent magnetic rings that the axis direction along centralizer body 3 is arranged in order, and is provided with a spacer ring 5 between adjacent two described Nd-Fe-B permanent magnetic rings.Each described Nd-Fe-B permanent magnetic ring preferably adopts and is made up of two semiorbicular permanent magnetism semi-rings docking.The internal diameter of spacer ring 5 equals the internal diameter of described Nd-Fe-B permanent magnetic ring, and the external diameter of spacer ring 5 equals the external diameter of described Nd-Fe-B permanent magnetic ring.Particularly, centralizer body 3 is outside equipped with 5 described Nd-Fe-B permanent magnetic rings and 4 spacer rings 5.
In addition, the outside wall surface at the middle part of centralizer body 3 is also provided with flange 31, and described combined type oil pumping rod centering device also comprises sheath 6, and the top of sheath 6 is connected by the threaded upper ends of internal thread with centralizer body 3; The bottom of sheath 6 is sheathed on permanent magnet 4 with outside spacer ring 5; The external diameter of sheath 6 equals the external diameter of flange 31, and the external diameter of flange 31 is less than the external diameter of supporting positive cover 1, and the lower end abutment of sheath 6 is on flange 31.Form annular space between the lower end of sheath 6 and centralizer body 3, permanent magnet 4 and spacer ring 5 are arranged at intervals in described annular space.As seen from Figure 1, the external diameter of the internal diameter of the bottom of sheath 6, the external diameter of permanent magnet 4 and spacer ring 5 is isometric.
In a concrete embodiment, sacrificial anode 2 is magnesium sacrificial anode, sacrificial anode 2 is arranged at the outside wall surface of the centralizer body 3 between flange 31 and supporting positive cover 1, and along on the axis direction of centralizer body 3, the length of sacrificial anode 2 equals the distance between flange 31 and supporting positive cover 1.Described magnesium sacrificial anode be monoblock cast on centralizer body 3, casting temperature is 650 degrees Celsius to 790 degrees Celsius, and it to room temperature, and then is put into annealing furnace and carry out stress relief annealing by air cooling, and annealing temperature is 300 degrees Celsius to 400 degrees Celsius.Be cast in by sacrificial anode 2 in the process of centralizer body 3 outside wall surface, sacrificial anode 2 is arranged between flange 31 and supporting positive cover 1 on the axial direction of centralizer body 3, can improve casting efficiency.Along the radial direction of centralizer body 3, the thickness of sacrificial anode 2 is 2.5 millimeters to 3.5 millimeters; Along the axis direction of centralizer body 3, the length of sacrificial anode 2 is 15 millimeters to 20 millimeters.
In order to make the casting of magnesium sacrificial anode 2 more firm, bulge loop is arranged at intervals with at the internal face of sacrificial anode 2, the outside wall surface of centralizer body 3 is provided with the groove matched with described bulge loop, during casting, make described scrobicular ring aim at described groove to embed, thus sacrificial anode 2 is firmly arranged at the outside wall surface of centralizer body 3.As shown in Figure 1, the internal face of described bulge loop is the face of cylinder, and the internal face of described bulge loop can also be hemisphere face.
In one preferred embodiment, supporting positive cover 1 is plastics supporting positive cover, and along the radial direction of centralizer body 3, the thickness of supporting positive cover 1 is 3 millimeters to 5 millimeters; Described plastics supporting positive cover is what to utilize injection machine by its thermosetting in the outside wall surface of centralizer body 3.Along the axis direction of centralizer body 3, the length of supporting positive cover 1 is 30 millimeters to 40 millimeters.Because the abrasion resistance of plastics, self lubricity are better, therefore described plastics supporting positive cover can protect the eccentric wear of rod string body effectively, and reduces the rate of depreciation of rod string, thus extends pump detection period, improves single well yield.The material of supporting positive cover 1 is engineering plastics, such as Merlon, polyformaldehyde, polyamide, thermoplastic's polyester, Noryl.
During operation, combined type oil pumping rod centering device of the present invention to be connected with overall rod string G.I.H every some rice, easy-to-use.
From technique scheme and specific embodiment, the beneficial effect of combined type oil pumping rod centering device of the present invention is:
1, described supporting positive cover is set on the outer circumference surface of centralizer body 3, righting is carried out to rod string, the eccentric wear of protection rod string body, and reduce the rate of depreciation of rod string, thus extend pump detection period, improve single well yield;
2, sacrificial anode 2 is set on the outer circumference surface of centralizer body 3, new battery is jointly formed as with rod string, make down-hole liquid polarization and activate, simultaneously, sacrificial anode 2 continuous electrolysis in water forms hydroxide, the uniform film of one deck can be formed after these hydroxide are adsorbed in rod string, thus rod string body can be prevented to be corroded and fouling; Meanwhile, these hydroxide can also effectively prevent inorganic salts from becoming dirt;
3, permanent magnet 4 is set on the outer circumference surface of centralizer body 3, the paraffin molecule in down-hole liquid is had magnetic and mutually repels, thus reaching the object preventing tube wall and sucker rod wax deposition;
4, flange 31 is set on the outer circumference surface of centralizer body 3, and bulge loop is set at sacrificial anode 2 internal face interval, enable sacrificial anode 2 monoblock cast fast and stable when centralizer body 3, improve casting efficiency.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.And it should be noted that, each ingredient of the present invention is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the present invention naturally covers other relevant with this case innovative point and combines and embody rule.
Claims (10)
1. a combined type oil pumping rod centering device, it is characterized in that, described combined type oil pumping rod centering device comprises the centralizer body (3) of column, the upper end of centralizer body (3) is provided with the screwed hole for connecting, the lower end of centralizer body (3) is provided with lower contact, and centralizer body (3) fixed sleeves is provided with permanent magnet (4), sacrificial anode (2) and supporting positive cover (1).
2. combined type oil pumping rod centering device according to claim 1, it is characterized in that, along the axis direction of centralizer body (3), permanent magnet (4), sacrificial anode (2) and supporting positive cover (1) set gradually from the top down, permanent magnet (4) comprises multiple Nd-Fe-B permanent magnetic rings that the axis direction along centralizer body (3) is arranged in order, and is provided with a spacer ring (5) between adjacent two described Nd-Fe-B permanent magnetic rings.
3. combined type oil pumping rod centering device according to claim 2, is characterized in that, each described Nd-Fe-B permanent magnetic ring is docked by two semiorbicular permanent magnetism semi-rings and forms.
4. combined type oil pumping rod centering device according to claim 2, is characterized in that, the internal diameter of spacer ring (5) equals the internal diameter of described Nd-Fe-B permanent magnetic ring, and the external diameter of spacer ring (5) equals the external diameter of described Nd-Fe-B permanent magnetic ring.
5. combined type oil pumping rod centering device according to claim 2, it is characterized in that, the outside wall surface at the middle part of centralizer body (3) is provided with flange (31), described combined type oil pumping rod centering device also comprises sheath (6), and the top of sheath (6) is connected by the threaded upper ends of internal thread with centralizer body (3); The bottom of sheath (6) is sheathed on permanent magnet (4) and spacer ring (5) outward; The external diameter of sheath (6) equals the external diameter of flange (31), and the external diameter of flange (31) is less than the external diameter of supporting positive cover (1), and the lower end abutment of sheath (6) is on flange (31).
6. combined type oil pumping rod centering device according to claim 5, it is characterized in that, sacrificial anode (2) is magnesium sacrificial anode, sacrificial anode (2) is arranged at the outside wall surface of the centralizer body (3) between flange (31) and supporting positive cover (1), along on the axis direction of centralizer body (3), the length of sacrificial anode (2) equals the distance between flange (31) and supporting positive cover (1).
7. combined type oil pumping rod centering device according to claim 5, is characterized in that, along the radial direction of centralizer body (3), the thickness of sacrificial anode (2) is 2.5 millimeters to 3.5 millimeters; Along the axis direction of centralizer body (3), the length of sacrificial anode (2) is 15 millimeters to 20 millimeters.
8. combined type oil pumping rod centering device according to claim 7, is characterized in that, the internal face of sacrificial anode (2) is arranged at intervals with bulge loop, and the outside wall surface of centralizer body (3) is provided with the groove matched with described bulge loop.
9. combined type oil pumping rod centering device according to claim 1, is characterized in that, supporting positive cover (1) is plastics supporting positive cover, and along the radial direction of centralizer body (3), the thickness of supporting positive cover (1) is 3 millimeters to 5 millimeters; Along the axis direction of centralizer body (3), the length of supporting positive cover (1) is 30 millimeters to 40 millimeters.
10. combined type oil pumping rod centering device according to claim 9, is characterized in that, the material of supporting positive cover (1) is engineering plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410822163.8A CN104563906B (en) | 2014-12-25 | 2014-12-25 | Combined-type sucker rod centralizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410822163.8A CN104563906B (en) | 2014-12-25 | 2014-12-25 | Combined-type sucker rod centralizer |
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| CN104563906A true CN104563906A (en) | 2015-04-29 |
| CN104563906B CN104563906B (en) | 2017-01-25 |
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| CN201410822163.8A Active CN104563906B (en) | 2014-12-25 | 2014-12-25 | Combined-type sucker rod centralizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801583A (en) * | 2016-12-29 | 2017-06-06 | 中国石油天然气股份有限公司 | Anti-corrosion safety oil passageway box cupling |
| CN107035363A (en) * | 2017-06-21 | 2017-08-11 | 西南石油大学 | Position finding and detection method after a kind of Horizontal well casing centering device tripping in |
| CN108316866A (en) * | 2017-01-17 | 2018-07-24 | 思达斯易能源技术(集团)有限公司 | A kind of hydraulic casing pipe centering device |
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| CN202431225U (en) * | 2012-01-04 | 2012-09-12 | 于春荣 | Antiseptic, anti-scale and anti-wax protector of oil tube and sucker rod |
| CN204457483U (en) * | 2014-12-25 | 2015-07-08 | 中国石油天然气股份有限公司 | Combined type oil pumping rod centering device |
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| CN2871803Y (en) * | 2006-03-30 | 2007-02-21 | 邬三喜 | Stabilizer of strong-magnetic waxproofing oil-pumping unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801583A (en) * | 2016-12-29 | 2017-06-06 | 中国石油天然气股份有限公司 | Anti-corrosion safety oil passageway box cupling |
| CN108316866A (en) * | 2017-01-17 | 2018-07-24 | 思达斯易能源技术(集团)有限公司 | A kind of hydraulic casing pipe centering device |
| CN107035363A (en) * | 2017-06-21 | 2017-08-11 | 西南石油大学 | Position finding and detection method after a kind of Horizontal well casing centering device tripping in |
Also Published As
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|---|---|
| CN104563906B (en) | 2017-01-25 |
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