CN113090198A - Metal armoured fibre reinforced composite continuous sucker rod - Google Patents
Metal armoured fibre reinforced composite continuous sucker rod Download PDFInfo
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- CN113090198A CN113090198A CN202110554196.9A CN202110554196A CN113090198A CN 113090198 A CN113090198 A CN 113090198A CN 202110554196 A CN202110554196 A CN 202110554196A CN 113090198 A CN113090198 A CN 113090198A
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- sucker rod
- inner sleeve
- joint
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- metal
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- 239000002184 metal Substances 0.000 title claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title description 8
- 239000000835 fiber Substances 0.000 title description 3
- 239000003733 fiber-reinforced composite Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011241 protective layer Substances 0.000 claims abstract description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 12
- 239000004917 carbon fiber Substances 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920005749 polyurethane resin Polymers 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims 2
- 239000004416 thermosoftening plastic Substances 0.000 claims 2
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000003129 oil well Substances 0.000 description 10
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/043—Threaded with locking means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/1085—Wear protectors; Blast joints; Hard facing
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a metal armored fiber reinforced composite continuous sucker rod, which comprises a sucker rod main body and a connector, wherein the sucker rod main body comprises a core part and a metal armored protective layer surrounding the core part, the connector is arranged at the end part of the sucker rod main body, the core part is made of resin-based fiber reinforced composite materials, the connector is a mechanical locking connector or an adhesive connector, the mechanical locking connector is connected with the sucker rod main body in a mechanical locking mode, the adhesive connector is connected with the sucker rod main body in an adhesive mode, the mechanical locking connector comprises an inner sleeve, an ejector rod and an outer sleeve, and the adhesive connector comprises a connector main body and an adhesive. The metal armored fiber reinforced composite continuous sucker rod provided by the invention is firm in connection, not easy to loosen, good in sealing effect, high in tensile strength and strong in practicability.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a metal armored fiber reinforced composite continuous sucker rod.
Background
The sucker-rod oil extraction technology is the most widely applied mechanical oil extraction technology at home and abroad at present. Sucker rods are one of the key components in sucker rod pumping systems.
The traditional steel sucker rod is made of special steel and adopts a sectional discontinuous structure, and the length of each section (root) of sucker rod is 7-9 meters. The oil pumping rod mainly has the following defects: (1) the density of the steel is high, the tensile strength is low, which not only leads to the increase of energy consumption in the process of applying the sucker rod, but also leads the maximum use depth of the sucker rod to be less than 2500 meters due to the limit of the self weight and the tensile strength of the sucker rod; (2) the steel is not resistant to corrosion of substances such as acid, alkali, hydrogen sulfide and the like; (3) when the sucker rods are used, each sucker rod is connected by a coupling, and then a plurality of sucker rods are connected in series to form a sucker rod string, so that the sucker rod string can be connected with an oil well pump at a depth of hundreds of meters to thousands of meters underground, which causes the sucker rod string to be easily worn and broken, has large field installation workload and high labor intensity of operators; (4) each coupling is about 150 mm in length and has a larger diameter than the sucker rod, so that when the sucker rod string moves up and down in the tubing, friction occurs between the coupling and the inner wall of the tubing, which is very likely to cause the coupling and/or the tubing wall to wear, and further cause the sucker rod string to break or the tubing wall to wear and leak, especially in deviated wells, horizontal wells, deep wells and heavy oil wells.
Sucker rods made of glass fiber reinforced plastic also exist in the prior art. The sucker rod also adopts a sectional discontinuous structure, the length of each section (root) of the sucker rod is 7 to 9 meters, and metal joints are bonded at the two ends of the sucker rod so as to be connected with external parts. The oil pumping rod mainly has the following defects: (1) when the sucker rods are used, each sucker rod is connected by a coupling, and then a plurality of sucker rods are connected in series to form a sucker rod string, so that the sucker rod string can be connected with an oil well pump which is deep from hundreds of meters to thousands of meters underground, which causes the increase of the labor intensity of field operators; (2) the coupling is easy to wear or break off, and the wall of the oil pipe is easy to abrade and leak; (3) the rod has poor resistance to lateral and axial forces and low tensile and fatigue strength.
Continuous flexible band-shaped sucker rods made of carbon fiber composite materials also exist in the prior art. Due to the flexibility of the resin at the time, the cross section of the sucker rod body has to be made flat square (i.e., the sucker rod is band-shaped as a whole) in order to meet the requirement of the coiling radius of the sucker rod body. However, this leads to the following disadvantages: (1) because the wide surface of the sucker rod body is single and thin, the sucker rod body has poor resistance to radial force vertical to the wide surface and is easy to bend and break; (2) when the force is not uniformly applied to the wide surface of the sucker rod body, the sucker rod is easy to tear longitudinally; (3) when axial force is applied to the sucker rod body, the sucker rod body is easy to bend to one side of the wide surface direction and break. In addition, the problem of connecting the composite material with the metal material has been a worldwide technical problem, especially for continuous flexible sucker rods made of fiber composite materials, which are hundreds of meters or even thousands of meters, the connecting part is connected with the metal joint by a connecting part which is positioned at the end of the sucker rod body and is ten centimeters long, and the connecting part usually bears the dynamic tension of tens of tons of force, so the technical difficulty is great, and the key to the reliable application of the sucker rod is the problem. In addition, since the mechanical properties of the sucker rod body may have anisotropy, the reliability of the joint of the sucker rod body to the metal joint may be much reduced. Because the part of the sucker rod body combined with the metal joint is the part with the most concentrated stress, the part is most easily damaged when the sucker rod body swings or vibrates, particularly the continuous flexible strip-shaped sucker rod made of the carbon fiber composite material. Through many years of field use, it was demonstrated that: the continuous flexible band-shaped sucker rod body made of the carbon fiber composite material has single bearing function, and poor mechanical property and poor reliability after being connected with a metal joint. As a result, such a sucker rod is far from meeting the use requirements of current oil field exploitation, and the use range of the sucker rod is limited.
Flexible electric trace heating sucker rods also exist in the prior art. The electric heating material of the sucker rod is an oxygen-free copper wire. The oxygen-free copper wire is positioned in the center of the sucker rod body and coated with an insulating layer, and the outer layer of the sucker rod is coated with a steel wire rope layer used as a bearing main body. The sucker rod mainly has the following defects: (1) the elongation of the steel wire rope layer as the bearing main body is increased after bearing, so that the efficiency of the oil well pump is reduced; (2) the steel wire rope layer is not wear-resistant and has short service life, namely the steel wire rope layer is scrapped integrally only by grinding off one steel wire; (3) the oxygen-free copper wire has high electrical conductivity but low electrothermal conversion efficiency, and thus is not suitable for use as an electrothermal converter. Therefore, the industrial applicability of such a sucker rod is not high.
The prior art also has a hollow electric heating type sucker rod. The sucker rod is a sucker rod string formed by connecting a plurality of hollow steel sucker rod sections in series, and the total length can reach hundreds of meters to thousands of meters. Each sucker rod section is a separate unit. The hollow part of each sucker rod section is filled with an electric heating material which is subjected to insulation treatment. In using such sucker rods, dedicated couplings are utilized to make electrical, mechanical, and sealing connections between sucker rod segments. In addition to the disadvantages common to the steel sucker rods described above, such rods have high sealing requirements and are prone to failure at the joints between sucker rod sections.
There is also a high strength wear resistant continuous flexible sucker rod in the prior art (utility model publication No. CN201883953U, patent No. zl201020643806. x. this sucker rod mainly consists of carbon fiber, epoxy resin, alkali-free glass fiber and aramid fiber flannelette, and there are the following defects:
(1) the problem of bonding composite materials to metals is a worldwide technical problem. In the above mentioned utility model, there is no method for connecting the sucker rod body with the external metal piece, which will directly affect the using effect of the sucker rod.
(2) Experiments prove that the protective layer of the sucker rod has poor protective performance on high-pressure water and is not suitable for electrifying and heating the rod body.
(3) The aramid flannelette and the epoxy resin have poor wettability, and the wettability can be improved only after the aramid flannelette and the epoxy resin are treated by a special physical and chemical method, so that the manufacturing process is complex, the technical difficulty is high, and the cost is high.
(4) Aramid fiber flannelette is expensive.
(5) Low cost performance and is not suitable for being used in large quantities.
(6) The shape is single, and the application range is limited.
There is also a carbon fiber continuous sucker rod in the prior art, (utility model patent No.: zl 201621059259.4. the inventor of this utility model patent is the same as the inventor of the present invention). The sucker rod mainly comprises carbon fibers, epoxy resin, alkali-free glass fibers and aramid flannelette, and has the following defects: the high-pressure water has poor protective performance and is not suitable for deep wells and ultra-deep wells.
In China, the number of high-water-content oil wells, high-liquid-viscosity oil wells, deep oil wells (the depth is more than 2500 meters), ultra-deep oil wells (the depth is more than 3000 meters), slant oil wells, ocean oil wells and high-corrosiveness oil wells is gradually increased, the well and mine environment is severe, the mining difficulty is high, and the number of pumping unit overload wells is gradually increased. Therefore, the sucker rod which has high tensile strength, eccentric wear resistance, light weight, corrosion resistance, fatigue resistance, low running energy consumption, simple and convenient field operation, safety and environmental protection is urgently needed.
Disclosure of Invention
The invention aims to provide a metal armored fiber reinforced composite continuous sucker rod to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the metal armored fiber reinforced composite continuous sucker rod comprises a sucker rod body and a connector, wherein the sucker rod body comprises a core part and a metal armored protective layer surrounding the core part, the connector is arranged at the end part of the sucker rod body, the core part is made of resin-based fiber reinforced composite materials, the connector is a mechanical locking connector or a bonding connector, the mechanical locking connector is connected with the sucker rod body in a mechanical locking mode, the bonding connector is connected with the sucker rod body in a bonding mode, the mechanical locking connector comprises an inner sleeve, an ejector rod and an outer sleeve, and the bonding connector comprises a connector body and an adhesive.
Furthermore, the inner sleeve surrounds and is clamped at the end part of the sucker rod main body, the outer peripheral surface of the inner sleeve is provided with a taper, the end surface of the ejector rod abuts against the end surface of the inner sleeve, the inner peripheral surface of the first end of the outer sleeve is provided with a taper which is the same as that of the outer peripheral surface of the inner sleeve and is clamped with the outer peripheral surface of the inner sleeve, the second end of the outer sleeve is in threaded connection with the ejector rod through internal threads, and after the mechanical locking type joint is connected with the sucker rod main body, the first end of the inner sleeve extends out of an outlet of the first end of the.
Furthermore, the mechanical locking type joint further comprises a locking nut and a set screw, the locking nut is arranged between the outer sleeve and the ejector rod, and the set screw locks the locking nut after the locking nut is locked.
Further, the joint body is surrounded at the end of the sucker rod body, the adhesive is coated between the inner circumferential surface of the joint body and the outer circumferential surface of the sucker rod body, the inner circumferential surface of the joint body adopts a tapered step structure or the adhesive contains chopped carbon fiber yarns.
Further, the length of the sucker rod main body is more than 1 meter.
Further, the material of the core comprises carbon fiber, thermosetting or thermoplastic resin, curing agent and release agent, more preferably the thermosetting resin is at least one of epoxy resin, phenolic resin, polyurethane resin, vinyl resin and unsaturated resin; or the thermoplastic resin is at least one of nylon, polyimide and fluoroplastic.
Further, the metal armor-protective layer is made of a metal alloy material.
Further, the mechanical locking type joint is provided with a hole having the same shape as the cross section of the sucker rod body at the axial center of the ejector rod so that the sucker rod body can pass through the hole, or at least one slit is respectively provided from both ends of the inner sleeve, the slit extends along the length direction of the inner sleeve and penetrates through a part of the inner sleeve, four first slits are provided along the circumferential direction from the end with the larger outer diameter of the inner sleeve, two adjacent first slits in the first slits are separated by a central angle of 90 degrees, two second slits are provided along the circumferential direction from the end with the smaller outer diameter of the inner sleeve, the two second slits are separated by a central angle of 180 degrees, one second slit in the two second slits is separated by a central angle of 45 degrees from one first slit in the four first slits, and the length of the first slit is less than the length of the second slit.
Compared with the prior art, the invention has the following beneficial effects: the metal armored fiber reinforced composite continuous sucker rod provided by the invention is firm in connection, not easy to loosen, good in sealing effect, high in tensile strength and strong in practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a side view, partially in cross-section, of a sucker rod according to an exemplary embodiment of the present invention.
FIG. 2 is a partial side cross-sectional view of a sucker rod body according to an exemplary embodiment of the present invention.
FIG. 3 is a cross-sectional view of the sucker rod body of FIG. 2.
Fig. 4 is a side cross-sectional view of a mechanical locking joint.
Figure 5 is a perspective view of the inner sleeve of the mechanical locking joint of figure 4.
Figure 6 is an end view of the inner sleeve of the mechanical locking joint of figure 5.
FIG. 7 is a partial cross-sectional side view of a bonded joint according to an exemplary embodiment of the invention.
Reference numerals:
1. a sucker rod main body; 2. a joint; 11. a core part; 12. a metal armor shielding layer; 21. a top rod; 22. locking the nut; 23. tightening the screw; 24. an outer sleeve; 25. an inner sleeve; 34. a connector body; 35. a stepped configuration; 251. a first slit; 252. a second slit.
Detailed Description
The invention is further described with reference to the following drawings and detailed description:
in the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-7, the metal-clad fiber reinforced composite continuous sucker rod according to the embodiment of the invention comprises a sucker rod body 1 and a joint 2, wherein the sucker rod body 1 comprises a core part 11 and a metal-clad protective layer 12 surrounding the core part 11, the joint 2 is arranged at the end part of the sucker rod body 1, the core part 11 is made of resin-based fiber reinforced composite material, the joint 2 is a mechanical locking joint or a bonding joint, the mechanical locking joint is connected with the sucker rod body 1 in a mechanical locking manner, the bonding joint is connected with the sucker rod body 1 in a bonding manner, the mechanical locking joint comprises an inner sleeve 25, a mandril 21 and an outer sleeve 24, and the bonding joint comprises a joint body 34 and an adhesive.
Specifically, the inner sleeve 25 surrounds and clamps the end of the sucker rod body 1, the outer circumferential surface of the inner sleeve 25 has a taper, the end surface of the ejector rod 21 abuts against the end surface of the inner sleeve 25, the inner circumferential surface of the first end of the outer sleeve 24 has a taper which is the same as the taper of the outer circumferential surface of the inner sleeve 25 and is clamped with the outer circumferential surface of the inner sleeve 25, the second end of the outer sleeve 24 is in threaded connection with the ejector rod 21 through internal threads, and after the mechanical locking type joint is connected with the sucker rod body 1, the first end of the inner sleeve 25 extends out of.
The mechanical locking type joint further comprises a locking nut 22 and a set screw 23, wherein the locking nut 22 is arranged between the outer sleeve 24 and the ejector rod 21, and the set screw 23 locks the locking nut 22 after the locking nut 22 is locked.
The joint body 34 is wrapped around the end of the sucker rod body 1, the adhesive is coated between the inner peripheral surface of the joint body 34 and the outer peripheral surface of the sucker rod body 1, and the inner peripheral surface of the joint body 34 adopts a tapered step structure 35 or the adhesive contains chopped carbon fiber yarns.
Wherein, the length of the sucker rod main body 1 is more than 1 meter, the material of the core 11 comprises carbon fiber, thermosetting or thermoplastic resin, curing agent and release agent, more preferably, the thermosetting resin is at least one of epoxy resin, phenolic resin, polyurethane resin, vinyl resin and unsaturated resin, or the thermoplastic resin is at least one of nylon, polyimide and fluoroplastic, and the metal armor protective layer 12 is made of metal alloy material.
The mechanical locking type joint is provided with a hole with the same shape as the cross section of the sucker rod body 1 at the axial center part of the mandril 21 so as to lead the sucker rod body 1 to pass through, or at least one slit is respectively provided from both ends of the inner sleeve 25, the slits extend in the length direction of the inner sleeve 25 and penetrate a portion of the inner sleeve 25, four first slits 251 are provided in the circumferential direction from the end having the larger outer diameter of the inner sleeve 25, two adjacent first slits 251 of the first slits 251 are spaced apart by a central angle of 90 degrees, two second slits 252 are provided in the circumferential direction from the end having the smaller outer diameter of the inner sleeve 25, the two second slits 252 are spaced apart by a central angle of 180 degrees, one second slit 252 of the two second slits 252 is spaced apart by a central angle of 45 degrees from one first slit 251 of the four first slits 251, and the length of the first slit 251 is smaller than the length of the second slit 252.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The metal armored fiber reinforced composite continuous sucker rod is characterized by comprising a sucker rod main body (1) and a joint (2), the sucker rod main body (1) comprises a core part (11) and a metal armor protective layer (12) surrounding the core part (11), the joint (2) is arranged at the end part of the sucker rod main body (1), the core part (11) is made of resin-based fiber reinforced composite material, the joint (2) is a mechanical locking type joint or an adhesive type joint, the mechanical locking type joint is connected with the sucker rod main body (1) in a mechanical locking way, the bonding type joint is connected with the sucker rod main body (1) in a bonding mode, the mechanical locking type joint comprises an inner sleeve (25), a push rod (21) and an outer sleeve (24), and the bonding type joint comprises a joint main body (34) and an adhesive.
2. The metal-armored fiber-reinforced composite continuous sucker rod of claim 1, wherein the inner sleeve (25) surrounds and clamps the end of the sucker rod body (1), the outer circumferential surface of the inner sleeve (25) has a taper, the end surface of the ejector rod (21) abuts against the end surface of the inner sleeve (25), the inner circumferential surface of the first end of the outer sleeve (24) has the same taper as the outer circumferential surface of the inner sleeve (25) and is clamped with the outer circumferential surface of the inner sleeve (25), the second end of the outer sleeve (24) is in threaded connection with the ejector rod (21) through an internal thread, and after the mechanical locking joint is connected with the sucker rod body (1), the first end of the inner sleeve (25) extends out of the outlet of the first end of the outer sleeve (24).
3. The metal armored fiber-reinforced composite continuous sucker rod of claim 1, wherein the mechanical locking joint further comprises a locking nut (22) and a set screw (23), the locking nut (22) being disposed between the outer sleeve (24) and the ejector pin (21), the set screw (23) locking the locking nut (22) after the locking nut (22) is locked.
4. The metal armored fiber-reinforced composite continuous sucker rod of claim 1, wherein the connector body (34) is wrapped around the end of the sucker rod body (1), the adhesive is coated between the inner circumferential surface of the connector body (34) and the outer circumferential surface of the sucker rod body (1), the inner circumferential surface of the connector body (34) adopts a tapered stepped structure (35) or the adhesive contains chopped carbon fiber yarns.
5. The metal armored fiber-reinforced composite continuous sucker rod of claim 1, wherein the length of the sucker rod body (1) is more than 1 meter.
6. The metal-clad fiber-reinforced composite continuous sucker rod of claim 1, wherein the material of the core (11) comprises carbon fiber, thermosetting or thermoplastic type resin, curing agent and release agent, more preferably the thermosetting type resin is at least one of epoxy resin, phenolic resin, polyurethane resin, vinyl resin and unsaturated resin, or the thermoplastic type resin is at least one of nylon, polyimide and fluoroplastic.
7. The metal-clad fiber reinforced composite continuous sucker rod of claim 1, wherein the metal-clad armor layer (12) is made of a metal alloy material.
8. The metal-armored fiber-reinforced composite continuous sucker rod of claim 1, wherein the mechanical locking joint is provided with a hole having the same shape as the cross section of the sucker rod body (1) at the axial center portion of the push rod (21) to pass through the sucker rod body (1), or at least one slit is provided from both ends of the inner sleeve (25), the slit extends along the length direction of the inner sleeve (25) and penetrates through a part of the inner sleeve (25), four first slits (251) are provided from the end of the inner sleeve (25) having the larger outer diameter in the circumferential direction, two adjacent first slits (251) of the first slits (251) are separated by a central angle of 90 degrees, and two second slits (252) are provided from the end of the inner sleeve (25) having the smaller outer diameter in the circumferential direction, the two second slits (252) are spaced apart from each other by a central angle of 180 degrees, one second slit (252) of the two second slits (252) is spaced apart from one first slit (251) of the four first slits (251) by a central angle of 45 degrees, and a length of the first slit (251) is smaller than a length of the second slit (252).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110554196.9A CN113090198A (en) | 2021-05-20 | 2021-05-20 | Metal armoured fibre reinforced composite continuous sucker rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110554196.9A CN113090198A (en) | 2021-05-20 | 2021-05-20 | Metal armoured fibre reinforced composite continuous sucker rod |
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| CN113090198A true CN113090198A (en) | 2021-07-09 |
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| CN202110554196.9A Pending CN113090198A (en) | 2021-05-20 | 2021-05-20 | Metal armoured fibre reinforced composite continuous sucker rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293929A (en) * | 2022-03-09 | 2022-04-08 | 中国石油大学胜利学院 | Quick connecting device of sucker rod |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304656A (en) * | 2016-04-25 | 2017-10-31 | 张建功 | Oil pumping system |
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2021
- 2021-05-20 CN CN202110554196.9A patent/CN113090198A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304656A (en) * | 2016-04-25 | 2017-10-31 | 张建功 | Oil pumping system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293929A (en) * | 2022-03-09 | 2022-04-08 | 中国石油大学胜利学院 | Quick connecting device of sucker rod |
| CN114293929B (en) * | 2022-03-09 | 2022-06-10 | 中国石油大学胜利学院 | Quick connecting device of sucker rod |
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Application publication date: 20210709 |