CN107304656A - Oil pumping system - Google Patents
Oil pumping system Download PDFInfo
- Publication number
- CN107304656A CN107304656A CN201610826280.0A CN201610826280A CN107304656A CN 107304656 A CN107304656 A CN 107304656A CN 201610826280 A CN201610826280 A CN 201610826280A CN 107304656 A CN107304656 A CN 107304656A
- Authority
- CN
- China
- Prior art keywords
- sucker rod
- main body
- oil pumping
- inner sleeve
- pumping system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
-
- 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
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
-
- 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
Abstract
The present invention discloses a kind of oil pumping system.The oil pumping system includes sucker rod main body (1) and joint (2).Sucker rod main body includes center portion (11) and surrounds the overcoat (12) of center portion.Sucker rod with electric tracing function also includes metal tube armouring electric heating (13).Sucker rod with fluid heat tracing and dilution (if needing dilution) function also includes metal tube (14).Joint is arranged on the end of sucker rod main body.Center portion is made up of resin-based carbon fiber composite.Overcoat is made up of fibre reinforced composites or metal material.Joint be mechanical Locking joint or adhered joint, wherein, mechanical Locking joint is connected by way of mechanical caging with sucker rod main body, and adhered joint is connected by way of bonding with sucker rod main body.
Description
Technical field
The present invention relates to a kind of oil pumping system, relate more specifically to suitable for field of petroleum exploitation by resin-based carbon fiber
The continuous flexible sucker rod of the compositions such as composite.
Background technology
Sucker rod pumping technology is the widest mechanical oil recovery technology of current domestic and international application.Sucker rod is bar pump oil recovery system
One of critical component in system.
Traditional steel sucker rod is made up of special steel material and uses segmented discontinuously to construct, every section of (root) sucker rod
Length is 7 to 9 meters.This sucker rod is primarily present following shortcoming：(1) density of steel is high, and tensile strength is relatively low --- and this is not
Only result in using the energy consumption increase during sucker rod, and the limitation of the weight and tensile strength due to sucker rod itself,
The maximum of sucker rod is less than 2500 meters using depth；(2) corrosion of the material such as this steel not acid and alkali resistance, hydrogen sulfide；(3) exist
During using sucker rod, connected between every sucker rod with box cupling, and then concatenated by many sucker rods and form rod string, thus side
Can be connected with hundreds of meters of the oil well pumps to thousands of meters of depths in underground --- this causes rod string easy to wear disconnected de-, and in-site installation is made
Industry amount is big, and the labor intensity of operator is high；(4) length of each box cupling is 150 millimeters, and the diameter of box cupling is than oil pumping
The diameter of bar is big, as a result, when rod string moves up and down in oil pipe, can be rubbed between box cupling and tube inner wall, this
Easily cause box cupling and/or tubing wall to wear and tear, and then cause the disconnected de- or tubing wall mill leakage of rod string, especially in inclined shaft, level
It is easier occur above-mentioned accident in well, deep-well and heavy oil wells.
Also there is the sucker rod being made up of fiberglass in the prior art.This sucker rod also uses the discontinuous structure of segmented
Make, the length of every section of (root) sucker rod is 7 to 9 meters, and the two ends of sucker rod are all bonded with metal joint, to connect with external component
Connect.This sucker rod is primarily present following shortcoming：(1) when using sucker rod, connected between every sucker rod with box cupling, and then
Concatenated by many sucker rods and form rod string, thus can be connected with hundreds of meters of the oil well pumps to thousands of meters of depths in underground ---
This causes the labor intensity of live operator to increase；(2) easily worn and torn at box cupling or disconnected de-, tubing wall is easily ground Lou；(3)
Sucker rod is poor to the repellence of side force and axial force, and tensile strength and fatigue strength are low.
Also there is the continuous flexible banding sucker rod being made up of carbon fibre composite in the prior art.Due to by that time
The flexible limitation of resin, so the requirement of the coil radius in order to meet oil pumping club shaft, have to be by club shaft of pumping
Make deltiod (that is, sucker rod is in banding on the whole) in cross section.However, this can cause following shortcoming：(1) because sucker rod bar
The wide face direction of body is thin, so its repellence to the radial load perpendicular to wide face is poor, easily bends and is broken；(2)
When the wide face to club shaft of pumping exerts a force uneven, longitudinal tear is easily produced；(3) when to oil pumping club shaft application axial force
When, oil pumping club shaft easily fractures to the curving in wide face direction.In addition, the connection of composite and metal material
Problem is always global technical barrier, particularly to the continuous of be made up of fibrous composite hundreds of meters even several kms
For flexible rod, the joint portion with more than ten centimeter lengths positioned at sucker rod rod end to be connected with metal joint entirely, and
Joint portion will generally bear the dynamic tension of tens ton forces, thus it is very big to implement technical difficulty --- and this is also sucker rod energy
The no key reliably applied.Further, since the mechanical mechanics property of this oil pumping club shaft may have anisotropy, so
The reliability of the joint portion being connected with metal joint of sucker rod may be reduced a lot.Due to oil pumping club shaft and metal joint
The position being combined is the position that stress is most concentrated, so when oscillating or vibrating occurs for club shaft of pumping, the position is easiest to
It is impaired --- the continuous flexible banding sucker rod being made up of carbon fibre composite is even more so.By field application for many years,
Prove：The bearing function for the continuous flexible banding sucker rod body of rod being made up of carbon fibre composite is single, mechanical mechanics property
And its reliability after being connected with metal joint is all very poor.As a result, this sucker rod is far from meeting making for current oilfield exploitation
With requiring, and then its use is caused to be limited in scope.
Also there is flexible electric tracing sucker rod in the prior art.The electric heating material of this sucker rod is oxygen-free copper-wire.Nothing
Oxygen copper cash is located at the center of oil pumping club shaft and is coated with insulating barrier, and the external sheath of sucker rod has the steel wire as arrying main body
Rope layer.This sucker rod is primarily present following defect：(1) as the steel wire rope layer of arrying main body, elongation increases after carrying
Greatly, causing the efficiency of oil well pump reduces；(2) steel wire rope layer is not wear-resistant, as long as service life is short --- rub a steel wire, steel
Cord layer is just overall to be scrapped；(3) electrical conductivity of oxygen-free copper-wire is high, but electric conversion efficiency is low, thus is not suitable for use in electric heating turn
Change body.Therefore, the industrial applicibility of this sucker rod is not high.
Also there is hollow electric heating type sucker rod in the prior art.This sucker rod is by the hollow steel sucker rod of multistage
The rod string that section is connected in series, total length is up to hundreds of meters to several kms.Each oil pumping bar segment is an independent unit.Respectively take out
The hollow part of beam hanger section is filled with the electric heating material Jing Guo insulation processing.When using this sucker rod, using special
Box cupling come realize it is each oil pumping bar segment between electrical connection, mechanically connect and seal.Except there is institute above in this sucker rod
Outside the defect common to steel sucker rod stated, the connecting portion sealing requirements between oil pumping bar segment are high and easily fail.
Also there is a kind of high-strength wear-resistant continuous flexible sucker rod in the prior art, (utility model Authorization Notice No.：
CN201883953U, the patent No.：ZL201020643806.X.The inventor of the utility model patent and the present inventor's phase
Together).This sucker rod is mainly made up of carbon fiber, epoxy resin, alkali-free glass fibre and aramid fiber flannelette, and there is following lack
Fall into：
(1) connectivity problem of composite and metal is worldwide technological puzzle.In above-mentioned utility model patent, do not have
It is related to the connection method of oil pumping club shaft and outer metal --- and this will directly affect the using effect of sucker rod.
(2) it the experiment proved that, the overcoat of above-mentioned sucker rod is poor to the barrier propterty of water under high pressure, be not suitable for being powered to the body of rod
Heating.
(3) aramid fiber flannelette and epoxy resin wellability are poor, and after need to being handled through special physical chemistry method, wellability could improve,
Cause manufacturing process complicated, technical difficulty is big, costly.
(4) aramid fiber flannelette is expensive.
(5) cost performance is low, is not suitable for largely using.
(6) shape is single, limited using scope.
In China, High water cut degree oil well, high fluid viscosity oil well, deep oil well (depth is more than 2500 meters), ultra-deep oil well (depth
More than 3000 meters), oblique oil well, the quantity of ocean oil well and highly corrosive oil well gradually increase, well ore deposit bad environments exploit difficulty
Greatly, the quantity of oil pumper overload well increases increasingly.Therefore, in the urgent need to a kind of tensile strength height, eccentric abrasion prevention, light weight, anti-corrosion
Lose, antifatigue, operation energy consumption is low, execute-in-place is easy and safety and environmental protection sucker rod.
The content of the invention
To achieve these goals, the present invention provides a kind of continuous flexible being made up of resin-based carbon fiber composite etc.
Sucker rod.
According to the first aspect of the invention there is provided a kind of oil pumping system, it includes sucker rod main body and joint, the oil pumping
Bar main body includes center portion and surrounds the overcoat of the center portion, and the joint is arranged on the end of the sucker rod main body.This hair
Bright oil pumping system is characterised by,
The center portion is made up of resin-based carbon fiber composite；And
The joint is mechanical Locking joint or adhered joint, and the mechanical Locking joint passes through mechanical caging
Mode is connected with the sucker rod main body, and the adhered joint is connected by way of bonding with the sucker rod main body.
Preferably, the sucker rod main body includes communication line.
Preferably, the overcoat is made up of resin based insulation fibre reinforced composites, and as electric insulation layer.
Preferably, the center portion is used as electrothermal conversion body.
Preferably, the mechanical Locking joint includes：
Inner sleeve (25), the inner sleeve surrounds and clamps the end of the sucker rod main body, and the inner sleeve
Outer peripheral face has taper；
Push rod (21), end face of its end face against the inner sleeve；And
Outer sleeve (24), the inner peripheral surface of the first end of the outer sleeve is with identical with the outer peripheral face of the inner sleeve (25)
Taper, so that the outer peripheral face with the inner sleeve engages, and the second end of the outer sleeve utilizes internal thread and the top
Bar (21) is connected.It is highly preferred that after the mechanical Locking joint completes to be connected with the sucker rod main body, the inner sleeve
(25) first end is stretched out from the outlet of the first end of the outer sleeve (24)；Or the mechanical Locking joint also includes：
Locking nut (22), it is arranged between the outer sleeve and the push rod；And
Holding screw (23), it is used to lock the locking nut after the locking nut is locked.
Selectively, the oil pumping system is sucker rod with electric tracing function or with fluid heat tracing and dilution function
Sucker rod, the push rod (21) longitudinal central portion be provided with and the cross section same shape of the sucker rod main body
Hole, so that the sucker rod main body is passed through；Or be respectively provided to since the two ends of the inner sleeve a few gap (251,
252), length direction of the gap along the inner sleeve extends through a part for the inner sleeve, more preferably from institute
The larger one end of external diameter for stating inner sleeve starts, peripherally disposed four the first gaps (251), phase in first gap
Two adjacent the first gaps all separate 90 degree of central angles；
Since the less one end of the external diameter of the inner sleeve, peripherally disposed two the second gaps (252) are described
Two the second gap is spaced apart 180 degree central angle；
Second gap in two second gaps and first gap in four first gaps every
Open 45 degree of central angles；And
The length in first gap is less than the length in second gap.
Preferably described adhered joint includes：
Adapter body (34), it surrounds the end of the sucker rod main body；And
Adhesive, it is coated between the outer peripheral face of the inner peripheral surface of the adapter body and the sucker rod main body, more excellent
The inner peripheral surface of adapter body described in selection of land uses tapered staircase structural model (35), or contains the carbon fibre that is chopped in described adhesive
Tie up yarn.
Preferably, the outer surface of the end being connected with the sucker rod main body of the adhered joint is provided with wavy
Carbon fiber and glass fiber compound material are tied with groove (36), the groove.
Preferably, the length of the sucker rod main body is more than 1 meter.
Preferably, constituting the material of the center portion includes carbon fiber, heat curing-type or thermoplastic resin, curing agent and the demoulding
Agent, more preferably thermosetting resin are epoxy resin, phenolic resin, polyurethane resin, vinyl ester resinses and unsaturated-resin
In minimum one of which；Or thermoplastic resin is the minimum one of which in nylon, polyimides and fluoroplastics.
Preferably, the overcoat (12) is made up of resin base fiber reinforced composite material or metal alloy compositions.
The matrix resin of preferably described overcoat (12) and the center portion (11) can be with identical, can also be different.
Preferably, the shape of cross section of the center portion is circular, ellipse, oblate or all directions shape.
It is highly preferred that the sucker rod with electric tracing function includes metal tube armouring electric heating (13)；And with stream
The sucker rod of body heat tracing and dilution function includes metal tube (14).
Another aspect of the invention provides a kind of rod connector, and it is arranged on the end of sucker rod main body, described to take out
Beam hanger main body has the center portion being made up of resin-based carbon fiber composite and the overcoat for surrounding the center portion, and its feature exists
In,
The rod connector is mechanical Locking joint or adhered joint, and the mechanical Locking joint passes through machinery
The mode of locking is connected with the sucker rod main body, and the adhered joint by way of bonding with the sucker rod main body
It is connected.
Brief description of the drawings
Hereinafter, it will be described in detail with reference to the accompanying drawings the exemplary embodiment of the present invention.In the accompanying drawings, with identical or phase
As reference indicate same or analogous part.In addition, accompanying drawing is exemplary, rather than it is restricted.In accompanying drawing
Part size and proportionate relationship it is not necessarily accurate.
Fig. 1 is the partial, partially-cross-sectioned side-elevation view of the sucker rod of the exemplary embodiment according to the present invention.
Fig. 2A is the sectional view of a part for the sucker rod main body of the exemplary embodiment according to the present invention.
Fig. 2 B are the sectional views of the sucker rod main body along the plane A-A interceptions in Fig. 2A.
Fig. 3 A are the sides of a part for the electrical heating type sucker rod main body of another exemplary embodiment according to the present invention
Sectional view.
Fig. 3 B are the sectional views along Fig. 3 A midplanes B-B sucker rod main bodys intercepted.
Fig. 4 A are that have heat tracing, dilution (if needing dilution) fluid circulation according to another exemplary embodiment of the invention
Passage heat tracing sucker rod sectional view.
Fig. 4 B are the sectional views along Fig. 4 A midplanes C-C sucker rod main bodys intercepted.
Fig. 5 is the sectional view of mechanical Locking joint.
Fig. 6 A are the perspective views of the inner sleeve of the mechanical Locking joint in Fig. 5.
Fig. 6 B are the end-views of the inner sleeve of the mechanical Locking joint in Fig. 5.
Fig. 7 is the partial, partially-cross-sectioned side-elevation view of the adhered joint of the exemplary embodiment according to the present invention.
Fig. 8 is the schematic diagram of the shape of cross section of the sucker rod main body of the exemplary embodiment according to the present invention.
Embodiment
<The unitary construction of sucker rod>
Fig. 1 is the partial, partially-cross-sectioned side-elevation view of the sucker rod of the exemplary embodiment according to the present invention.As shown in figure 1, sucker rod
Including sucker rod main body 1 and the joint 2 for being arranged on the two ends of sucker rod main body 1.
Fig. 2A is the sectional view of a part for sucker rod main body 1.Fig. 2 B are taking out along the plane A-A interceptions in Fig. 2A
The sectional view of beam hanger main body 1.As shown in Figure 2 A and 2 B, sucker rod main body 1 includes center portion 11 and surrounds the overcoat of center portion 11
12.Center portion 11 is fabricated by by resin-based carbon fiber composite through pultrude process.The matrix resin of center portion 11 can be heatproof
Class requirement reaches more than 180 degrees Celsius of thermosetting resin (such as epoxy resin, phenolic resin, polyurethane resin, vinyl
Fat resin and unsaturated-resin etc.) or thermoplastic resin (such as nylon, polyimides and fluoroplastics).In addition, center portion 11
Fatigue strength is high：By 100 hertz, 107After secondary dynamic tensile, residual intensity is original 90%；And in same test-strips
Under part, the residual intensity of steel center portion only has original 30% to 40%.Therefore, it is made up of resin-based carbon fiber composite
Center portion 11 is suitable as arrying main body.Overcoat 12 can be made up of resin base fiber reinforced composite material.Overcoat 12 and the heart
The matrix resin in portion 11 can be with identical, can also be different, and reinforcing fiber desired strength height, high temperature resistant, electricity in overcoat 12 are exhausted
Edge performance is good, processing technology is simple, anti-wear property is good, with resin wellability is good, cost performance is high etc., so as to play electric insulation and
The effect of anticollision.According to above-mentioned requirements, the reinforcing fiber in overcoat 12 can use alkali-free glass fibre yarn, alkali-free glass
Fiber cloth or alkali-free glass fibre felt etc..
Fig. 3 A are the sides of a part for the electrical heating type sucker rod main body of another exemplary embodiment according to the present invention
Sectional view.Fig. 3 B are the sectional views along Fig. 3 A midplanes B-B sucker rod main bodys intercepted.In the example shown in Fig. 3 A and Fig. 3 B
In property embodiment, sucker rod main body 1 is in addition to including center portion 11 and overcoat 12, in addition to (the electric tracing of electric tracing cable 13
The usage quantity of cable 13 is more than one).Electric tracing cable 13 has metal tube armouring, uses silicon rubber, fluoroplastics, glass
It is one or several kinds of as insulation in fibrous composite, mica, ceramics or alumina powder, and use oxygen-free copper nickel-coated wire conduct
Ampere wires and electrothermal conversion body.Electric tracing cable 13 is arranged between center portion 11 and overcoat 12, if using more than two
Electric tracing cable 13, then these electric tracing cables 13 be symmetrically distributed in around center portion 11.Electric tracing cable 13 can be by after being powered
Electric energy is converted into heat energy.Externally fed power supply (not shown), the oxygen-free copper nickel-coated wire of electric tracing cable 13 and metal tube armouring are common
With composition electrical heating loop.Overcoat 12 coated firmly center portion 11 and electric tracing cable 13.The heat warp that electric tracing cable 13 is produced
Overcoat 12 conducts and heats the crude oil in oil pipe.The compressive resistance of the metal tube of metal tube armouring is more than 30 MPas.
Further, since carbon fiber belongs to semi-conducting material, its electric conversion efficiency, up to more than 98%, is so far
Know electric conversion efficiency highest electric heating body (after tested, the resistivity of a diameter of 19 millimeters of center portion 11 be 0.1 ohm/
Rice).That is, electric energy can be efficiently converted into heat energy by carbon fiber.Therefore, center portion 11 is also used as electric heating conversion
Body, so that sucker rod is made into electrical heating type sucker rod.The great advantage of this method is that electric conversion efficiency is high；Major defect
It is that complex manufacturing, difficulty of processing be big, production equipment is expensive and technology performance difficulty, product technology stability is poor, property
Valency is than relatively low.Therefore, this scheme should not be used under current process technology level.
Fig. 4 A are a parts for the fluid heating type sucker rod main body of another exemplary embodiment according to the present invention
Sectional view.Fig. 4 B are the sectional views of the sucker rod main body along the plane C-C interceptions in Fig. 4 A.Shown in Fig. 4 A and Fig. 4 B
In exemplary embodiment, sucker rod main body 1 in addition to including center portion 11 and overcoat 12, in addition to heat tracing fluid, dilution (if
Need dilution) passage of fluid circulation, i.e. metal tube 14 (usage quantity of metal tube 14 be more than one).In figure metal tube 14 by
Stainless steel or other metals are made.If during using the metal tube 14 of more than two, these metal tubes 14 are symmetrically distributed in the heart
Around portion 11.Center portion 11 and metal tube 14 are coated integrally by overcoat 12.Metal tube 14 (compressive resistance is more than 30 MPas)
It can be made up of circular or other shape tubes.The manufacturing process of this sucker rod is as follows：Center portion 11 is initially formed, then by metal
Pipe 14 is arranged in the both sides of center portion 11, then is wrapped with alkali-free glass fibre and epoxy resin through winding pultrude process composition overcoat 12
Wrap center portion 11 and metal tube 14.When club shaft of pumping works in oil well, heat tracing fluid enters from the upper end of metal tube 14.
During heat tracing flow of fluid, in tube wall and the conduction heating oil pipe of overcoat 12 of the heat through metal tube 14 of heat tracing fluid
Crude oil；Meanwhile, the heat tracing fluid flowed out from the lower end of metal tube 14 enters in oil pipe, to heat and dilute (if needing dilution) oil pipe
Interior crude oil.
<The construction of mechanical Locking joint>
Fig. 5 is the sectional view of the mechanical Locking joint of the exemplary embodiment according to the present invention.As shown in figure 5, machine
Tool locking-type joint includes push rod 21, outer sleeve 24 and inner sleeve 25 (inner sleeve is alternatively referred to as locking cylinder).Inner sleeve 25 tightly covers
In the end perimeter of sucker rod main body.The inner peripheral surface of the right-hand member of outer sleeve 24 has taper, and the outer peripheral face of inner sleeve 25 also has cone
Degree.For example, the inner peripheral surface of outer sleeve 24 and the taper of outer peripheral face of inner sleeve 25 can be 1: 40.So, inner sleeve 25
Less one end of external diameter (being right-hand member in Fig. 4) can be inserted in outer sleeve 24 along direction from left to right and finally tightly be stuck in outer
In sleeve 24.The left and right ends of push rod 21 are both provided with screw thread.The left end of push rod 21 can be connected with miscellaneous part, push rod 21
Right-hand member screws in the left end of outer sleeve 24.With the screw-in of push rod 21, the end face of push rod 21 is incited somebody to action against the left side of inner sleeve 25
Inner sleeve 25 in insertion outer sleeve 24 is pushed away to the right together with sucker rod main body 1.Due to the right-hand member of outer sleeve 25 inner peripheral surface and
The presence of the taper of the outer peripheral face of inner sleeve 25, inner sleeve 25 is finally tightly stuck in outer sleeve 24 together with sucker rod main body 1.
Mechanical Locking joint can also include：Locking nut 22, it is arranged between outer sleeve 25 and push rod 21；Tightening
Screw 23, it is used to lock locking nut 22 after locking nut 22 is screwed, to prevent locking nut 22 from loosening；Inner sleeve
After 25 clamping sucker rod main bodys 1, the right-hand member of inner sleeve 25 stretches out at least 25 millimeters from the right-hand member outlet of outer sleeve 24, so that oil pumping
The stress that the right-hand member exit of inner sleeve 25 is concentrated in bar main body 1 is gradually reduced.Particularly when sucker rod main body 1 occur vibration or
During swing, the elasticity of extension can protect sucker rod main body 1 from the destruction of stress concentration.
Push rod 21, locking nut 22, holding screw 23, outer sleeve 24 and inner sleeve 25 can be by metal material and/or alloys
Material is made.
Fig. 6 A are the perspective views of the inner sleeve of the mechanical Locking joint in Fig. 5.Fig. 6 B are that the mechanical Locking in Fig. 5 connects
The end-view of the inner sleeve of head.As shown in Figure 6 A and 6 B, since the two ends of inner sleeve 25, it can be respectively provided to few one
Gap, these gaps extend through a part for inner sleeve 25 all along the length direction of inner sleeve 25.
In the embodiment shown in Fig. 4 A and Fig. 4 B, since the larger one end of the external diameter of inner sleeve 25, along the circumferential direction
Equably it is provided with four short gaps 251, that is to say, that two adjacent gaps 251 all separate 90 in this four short gaps 251
Spend central angle.The end face of less one end of external diameter of the terminal of this four short gaps 251 away from inner sleeve 25 (being right-hand member in Fig. 4 A)
There is 20 millimeters of distance.Meanwhile, since the less one end of the external diameter of inner sleeve 25 (being right-hand member in Fig. 4 A), along the circumferential direction set
It is equipped with two long gaps 252 for being separated by 180 degree central angle.The length of than every long gap 252 of the length of every short gap 251 is small
5 millimeters.In addition, when being looked along the axial direction of inner sleeve 25, any one long gap 252 short gap adjacent thereto every
45 ± 5 degree of central angles are opened, as shown in Figure 4 B.
Due to the presence in above-mentioned gap 251 and 252, when inner peripheral surface of the inner sleeve 25 along outer sleeve 24 moves right,
The periphery wall of inner sleeve 25 can be in the presence of radial compression power to contract, so as to further clamp sucker rod main body 1
End.
<The construction of adhered joint>
Fig. 7 is the partial, partially-cross-sectioned side-elevation view of the adhered joint of the exemplary embodiment according to the present invention.As shown in fig. 7, viscous
The formula joint of connecing includes：Adapter body 34, it is enclosed on the end of sucker rod main body 1；And adhesive, it is coated on adapter body 34
Inner peripheral surface and sucker rod main body 1 outer peripheral face between, so that sucker rod main body 1 and adapter body 34 are bonded together.In order to
Adhesive strength is improved, adhesive is made up of high-strength high temperature-resistant resin and a certain proportion of chopped carbon fiber yarn.In addition, joint master
The inner peripheral surface of body 34 employs tapered staircase structural model 35.
In addition, the outer surface of the end (being right-hand member in Fig. 7) being connected with sucker rod main body of adhered joint is provided with ripple
Wave-like groove 36.Carbon fiber and glass fiber compound material are tied with groove 36.
<Other constructions>
Although above for purposes of brevity without referring to following construction, it will be appreciated by those skilled in the art that
, involved in the present invention the part in need screwed is all provided with appropriate position suitable for utilizing the instruments such as card spanner
The square face of screwing operations is carried out, these square faces meet the API standard of American Petroleum Institute's formulation.
The hand of spiral of part involved in the present invention can select levoform screw thread and/or dextrorotation according to actual needs
Formula screw thread, in order to which in-site installation is operated.
The sucker rod main body of the present invention can also include communication line (for example, communication cable or optical fiber), be taken out to realize
The communication and oil pumping between communication, oil pumping bar segment between pressure sensor or temperature sensor of beam hanger section and oil well etc.
Communication between bar and external information processing.
Electric heating in the electric tracing sucker rod of the present invention is connected with power supply lines by anti-explosion terminal box.
The electric tracing sucker rod of the present invention is powered by power supplys such as AC or DCs.
Metal tube in the fluid heat tracing sucker rod of the present invention is connected with exterior tubing by connector.
In addition, the shape of center portion of the sucker rod of the present invention can be come neatly to select according to actual needs, for example, can be with
Selection circle, ellipse, oblate or all directions shape etc., as shown in Figure 8.
<The manufacture method of sucker rod main body>
The manufacture method of sucker rod main body is mainly included the following steps that：
First, the use of high-quality carbon fiber yarn and fire resistant resin is raw material, using winding pultrude process technology manufacture.By carbon
Silvalin, from creel draw, through yarn guide enter drying baker drying after enter glue groove impregnation, and it is preformed after turn into center portion
11；Then, alkali-free glass fibre or alkali-free glass fibre felt cladding center portion 11 are formed into overcoat 12 using wrapping machine, into mould
Have heating cure, then wound after solidify afterwards.Drawing mechanism uses reciprocating hydraulic haulage gear.Pultrude process is manufacture fiber
Strengthen one of conventional process of composite, for example, may be referred to《The development of novel carbon fiber sucker rod》(old thickness etc., chemical industry
Science and technology, 2001,9 (2)：pp13-15).
The use of high-quality carbon fiber yarn and fire resistant resin is raw material when manufacturing electric tracing sucker rod, using winding pultrusion
Technology is manufactured.Drawn by carbon fiber yarn, from creel, enter through yarn guide and enter glue groove impregnation, warp after drying baker drying
Turn into center portion 11 after preforming；Then, by metal tube armouring electric heating 13 and center portion 11 side by side synchronously enter wrapping machine, by nothing
Alkali containing glass fibre or alkali-free glass fibre felt coat center portion 11 and metal tube armouring electric heating 13 and form overcoat 12, enter
Mould heating cure, then wound after solidify afterwards.Drawing mechanism uses reciprocating hydraulic haulage gear.
When manufacturing the sucker rod of fluid heat tracing and dilution (if needing dilution), high-quality carbon fiber yarn and fire resistant resin are used
For raw material, manufactured using winding pultrude process technology.Draw, dried through yarn guide into drying baker by carbon fiber yarn, from creel
Enter glue groove impregnation after dry, it is preformed rear as center portion 11；Then, it is metal tube 14 and center portion 11 is synchronous into winding side by side
Machine, coats center portion 11 and metal tube 14 with alkali-free glass fibre or alkali-free glass fibre felt and forms overcoat 12, into mould
Heating cure, then wound after solidify afterwards.Drawing mechanism uses reciprocating hydraulic haulage gear.
The sucker rod being made according to the above method, the continuous length of every section of (root) sucker rod up to several meters, tens meters, hundreds of
More than rice or a few kms, hence it is evident that than steel sucker rod segment length.Meanwhile, the coiling bending half for the sucker rod being made according to the above method
Footpath can be less than 1.5 meters, and this shows that the pliability of the sucker rod of the present invention is considerably better than traditional steel sucker rod.Exactly base
In above-mentioned reason, sucker rod of the invention is referred to as " continuous flexible sucker rod ".
<Industrial applicibility>
The sucker rod of the present invention has the following advantages that：
1. with high ratio modulus, high specific strength.Specifically, the tensile strength of sucker rod of the invention is up to 1,800,000,000
Handkerchief, is more than 2 times of traditional steel sucker rod；In addition, the km quality of the sucker rod of the present invention is 200 kilograms to 1,000,000
Gram, equivalent to the 1/20 to 1/4 of the steel sucker rod bar weight of equal length., can be with when for deep-well or ultradeep well oil recovery
Easily implement big pump and take out technology deeply.Therefore, it is real while convenient economically raising oil exploitation efficiency and oil recovery rate
Energy-saving, safety and environmental protection is showed.
2. the shape of cross section of center portion is circle etc., the mechanical mechanics property than existing banding sucker rod is more superior.
3. anti-fatigue performance is good.Through 100 hertz, 26-80 thousand Ns of alternate loads, 107After secondary fatigue experiment, residual intensity
Still there is 90% (and under same test condition, the residual intensity of steel sucker rod is only 30% to 40%).It therefore, it can extension
The service life of equipment, reduces activity duration and number of times, and rate when improving the operating of rod-pumped well increases oil production.
4. corrosion resistance is strong.Can for a long time it be used in the corrosive atmospheres such as acid, alkali and hydrogen sulfide.
5. pliability is good, minimum coil radius is up to 1.5 meters.Therefore, rountrip when being readily transported and install.
6. only needing two joints at connecting with pumping rod two ends when being connected with miscellaneous part, thus make the simpler jail of connection
Lean on, operation is easier, workload can be reduced.
7. possess electric heating function, it is adaptable to thickened oil recovery.
8. the cross-sectional area of sucker rod is small, the 1/5 of the cross-sectional area of only traditional steel sucker rod.It therefore, it can subtract
The flow resistance of small liquid and the resistance of motion of sucker rod, so as to reduce energy consumption.
9. the carbon fiber body of rod is coated by high-wearing feature material, thus can be reduced oil well with the service life of extension device and made
Industry amount and expense, increase oil production.
10. with multi-functional, it can conveniently realize the heat of electricity half, fluid heat tracing, dilution (if needing dilution), communication function.
11. environmental protection, waste and old sucker rod can be with recycling.
<Example>
The continuous flexible sucker rod of the present invention tests 13 mouthfuls in low system effectiveness well, and big pump oil well examination need to be changed by increasing in yield
Test 1 mouthful, 3 mouthfuls of ultradeep well, 4 mouthfuls of inclined shaft.
In the experiment of low system effectiveness Portugal 170-06 wells, the well pump is deep 1143 meters, and consumption power is 4.856 thousand before experiment
Watt, day power consumption be 116.5 kilowatt hours.Test 3.078 kilowatts of post consumption power, day power consumption be 73.8 kilowatt hours, energy-conservation
36.6%, system effectiveness improves 2.85 percentage points.Sucker rod partial wear is serious before experiment；After experiment 510 days, in November, 2013
Rise through operation, sucker rod surface is smooth, effectively alleviates rod and tube partial-wear, and then proceeding to go into the well uses, and has used so far
More than 1300 days.
Helped in low system effectiveness Portugal in the experiment of 172-492 wells, the well pump is deep 1491 meters, is taken out using 19 millimeters of continuous flexibles of Φ
Connection 22 millimeters of Φ, 676.84 meters of steel sucker rods below 1100 meters of beam hanger, continuous flexible sucker rod.Taken the photograph after experiment through twice 110
Family name's degree high temperature heat-clearing is washed, the equal normal operation of system.After experiment, 29 peaces of the upper electric current before testing drop to 9 peaces, active power
Drop to 3.057 kilowatts by 6.266 kilowatts, power saving rate reaches 51.21%；In addition, system effectiveness 3.08% carrying before testing
Height improves 3.33% to 6.41%.In June, 2014, the well instead gave birth to wax card due to surveying static pressure closing well, through more than 300 thousand Ns of drawing solutions
After card, still using, embodying higher tensile strength and endurance life, normally running more than 1200 days at present.
In high yield liquid need to change planes and test on oblique 942 wells of pump sump Portugal 57-, 27 degree of the well hole deviation.Oil pumper is 6 type machines,
Pump is deep 1183 meters.When before experiment using conventional steel sucker rod, rod tube serious wear.To improve oil production, well pump footpath is by Φ 57
Millimeter is adjusted to 70 millimeters of Φ.If using traditional steel sucker rod, the theory load of the well is up to 70.59 thousand Ns,
It need to change and large-scale oil pumper is changed after big pump.In process of the test, 19 millimeters of Φ, 800 meters of continuous flexible sucker rods, bottom are used
Connect 22 millimeters of Φ, 383 meters of steel sucker rods.After experiment, it is only 53.88 thousand Ns to measure maximum polished rod load, lower than theory load
16.71 thousand Ns, maximum polished rod load ratio reduces 24% using steel sucker rod.After using continuous flexible sucker rod, realize
Small type drives Φ 70 millimeters of oil well pumps, so as to save disposable large-scale oil pumper cost input.In order to efficiently control
Oil well submergence, carries out changing big pump measure, acts that 19 millimeters of companies of Φ are found after down-hole string on July 10th, 2014 to the test well
Continuous flexible rod surface is smooth, no wear phenomenon, is ground at the piece-root grafting hoop of 22 mm H Y grade pumping rods of steel sucker rod bottom Φ the 9th
It is de-, oil pipe grinding leakage.Compared with the steel sucker rod used in same well, continuous flexible sucker rod shows stronger wearability
And tensile strength.In order to coordinate 83 millimeters of oil well pumps of Φ, well design uses 19 millimeters of Φ, 800 meters of continuous flexible sucker rods, under
Portion connects 25 millimeters of Φ, 300 meters of steel sucker rods, and design pump is deep 1100 meters, and 3.5 meters of operational factor stroke is made a spurt 4 beats/min, made
It it is 57.73 thousand Ns with rear test polished rod load.The pump for creating 1100 well depths is hung, and 200 meters of submergence, ground uses 5 type machines, matches somebody with somebody
The world standard of 83 millimeters of oil well pumps of underground Φ.At present, the well is normally run more than 1200 days.
<Economic and Efficiency Analysis>
Project Meteorological：2 mouthfuls of test wells spend RMB 16 altogether using continuous flexible sucker rod and its kit
Wan Yuan.
According to the applicable cases helped in the relatively low Portugal of system effectiveness on 172-492 wells, 77.02 kilowatt hours of economizing on electricity individual well day,
28112.3 kilowatt hours it is expected that year can economize on electricity.Calculated with 0.6381 yuan/kilowatt hour of the electricity charge, year can 1.8 ten thousand yuan of power cost saving；Save
2.7 ten thousand yuan of the expense of 19 millimeters of Φ, 1100 meters of steel sucker rods；Save 1.5 ten thousand yuan of the expense of centralizer.Total 60,000 yuan of benefit.
According to the applicable cases on oblique 942 wells of Portugal 57- that high yield liquid need to change planes pump, compared with full factory's average level,
Individual well day 112.4 kilowatt hours of economize on electricity, it is contemplated that 41023 kilowatt hours of economizing on electricity in year.Calculated with 0.6381 yuan/kilowatt hour of the electricity charge, year saves
2.6 ten thousand yuan of the electricity charge.In addition, large-scale 14.4 ten thousand yuan of the oil pumper cost of replacing can be saved, 22 millimeters of Φ, 800 meters of steel sucker rods are saved
3.0 ten thousand yuan of expense；Save 1.5 ten thousand yuan of centralizer.Change after big pump, the well increase day by day oil 1.2 tons, with the guarantee of 70 millimeters of oil well pumps of Φ
Phase is to calculate for 280 days, it is contemplated that can accumulate 336 tons of increasing oil, can create 1,210,000 yuan of economic benefit.Total 1,430,000 yuan of benefit.
According to the applicable cases on La7-P261Jing, the well Produced Liquid concentration is 428 mg/litres.From 12 months 2012
To before experiment starting date, due to rod and tube partial-wear, steel rod parting is caused to examine pump 3 times, average pump detection period 213 days, bar
Pipe eccentric wear is than more serious.For objective evaluation continuous flexible sucker rod test effect, design uses 25 millimeters of metal sucker rods of Φ
250 meters are used as weighted lever.In order to prevent weighted lever from wearing and tearing, interior spraying oil pipe is employed in matching tubing string section.Weighted lever
Centralizer is not arranged in part, and uses two-way protective coupling.The test well is successfully gone into operation on the 16th May, work(before and after contrast test
Figure, alternate load declines 7,000 Ns, more front lower than experiment to have dropped 20%, and the average pump detection period than the well exceeds 500 days.
Describe multiple exemplary embodiments of the present invention for purposes of illustration and description above.However, to this area
Technical staff for, many modifications and variations are obvious.Select and describe above-described embodiment only to facilitate originally
The technical staff in field understands the principle and its practical application of the present invention, and is not intended to limit the scope of the present invention to above-mentioned tool
Body embodiment.It is understood that the scope of the present invention is limited by claims and its equivalents.Those skilled in the art
Also, it is understood that each single item technical characteristic of the invention disclosed in specification particularly Summary can arbitrarily arrange in pairs or groups and group
Close.
Claims (33)
1. a kind of oil pumping system, including sucker rod main body (1) and joint (2), the sucker rod main body include center portion (11) and bag
The overcoat (12) of the center portion is enclosed, the joint (2) is arranged on the end of the sucker rod main body (1), it is characterised in that
The center portion (11) is made up of resin-based carbon fiber composite；And
The joint is mechanical Locking joint or adhered joint, and the mechanical Locking joint is by way of mechanical caging
It is connected with the sucker rod main body, and the adhered joint is connected by way of bonding with the sucker rod main body.
2. oil pumping system according to claim 1, wherein,
The sucker rod main body includes communication line.
3. oil pumping system according to claim 1, wherein,
The overcoat is made up of resin based insulation fibre reinforced composites, and as electric insulation layer.
4. oil pumping system according to claim 1, wherein,
The center portion is used as electrothermal conversion body.
5. oil pumping system according to claim 1, wherein,
The mechanical Locking joint includes：
Inner sleeve (25), the inner sleeve surrounds and clamps the end of the sucker rod main body, and the periphery of the inner sleeve
Mask is tapered；
Push rod (21), end face of its end face against the inner sleeve；And
There is outer sleeve (24), the inner peripheral surface of the first end of the outer sleeve outer peripheral face identical with the inner sleeve (25) to bore
Degree, so that the outer peripheral face with the inner sleeve engages, and the second end of the outer sleeve utilizes internal thread and the push rod
(21) it is connected.
6. oil pumping system according to claim 5, wherein,
After the mechanical Locking joint and the sucker rod main body complete to be connected, the first end of the inner sleeve (25) is from institute
The outlet for stating the first end of outer sleeve (24) is stretched out.
7. oil pumping system according to claim 5, wherein,
The mechanical Locking joint also includes：
Locking nut (22), it is arranged between the outer sleeve and the push rod；And
Holding screw (23), it is used to lock the locking nut after the locking nut is locked.
8. oil pumping system according to claim 5, wherein,
The oil pumping system is the sucker rod with electric tracing function or the sucker rod with fluid heat tracing He dilution function, in institute
The longitudinal central portion of push rod (21) is stated provided with the hole with the cross section same shape of the sucker rod main body, so that the oil pumping
Bar main body is passed through.
9. oil pumping system according to claim 5, wherein,
It is respectively provided to a few gap (251,252) since the two ends of the inner sleeve, the gap is along the inner sleeve
Length direction extend through the part of the inner sleeve.
10. oil pumping system according to claim 9, wherein,
Since the larger one end of the external diameter of the inner sleeve, peripherally disposed four the first gaps (251), described first
Two adjacent the first gaps all separate 90 degree of central angles in gap；
Since the less one end of the external diameter of the inner sleeve, peripherally disposed two the second gaps (252), described two
Second gap is spaced apart 180 degree central angle；
Second gap in two second gaps separates 45 with first gap in four first gaps
Spend central angle；And
The length in first gap is less than the length in second gap.
11. oil pumping system according to claim 1, wherein,
The adhered joint includes：
Adapter body (34), it surrounds the end of the sucker rod main body；And
Adhesive, it is coated between the outer peripheral face of the inner peripheral surface of the adapter body and the sucker rod main body.
12. oil pumping system according to claim 11, wherein,
The inner peripheral surface of the adapter body uses tapered staircase structural model (35).
13. oil pumping system according to claim 1, wherein,
The outer surface of the end being connected with the sucker rod main body of the adhered joint is provided with waved flute (36), institute
State and carbon fiber and glass fiber compound material are tied with groove.
14. oil pumping system according to claim 11, wherein,
Contain chopped carbon fiber yarn in described adhesive.
15. oil pumping system according to claim 1, wherein,
The length of the sucker rod main body is more than 1 meter.
16. oil pumping system according to claim 1, wherein,
Constituting the material of the center portion includes carbon fiber, heat curing-type or thermoplastic resin, curing agent and releasing agent.
17. oil pumping system according to claim 16, wherein,
Thermosetting resin is minimum in epoxy resin, phenolic resin, polyurethane resin, vinyl ester resinses and unsaturated-resin
One of which.
18. oil pumping system according to claim 16, wherein,
Thermoplastic resin is the minimum one of which in nylon, polyimides and fluoroplastics.
19. oil pumping system according to claim 1, wherein,
The overcoat (12) is made up of resin base fiber reinforced composite material or metal alloy compositions.
20. oil pumping system according to claim 1, wherein,
The matrix resin of the overcoat (12) and the center portion (11) can be with identical, can also be different.
21. oil pumping system according to claim 1, wherein,
The shape of cross section of the center portion is circular, ellipse, oblate or all directions shape.
22. oil pumping system according to claim 8, wherein,
Sucker rod with electric tracing function includes metal tube armouring electric heating (13)；And
Sucker rod with fluid heat tracing and dilution function includes metal tube (14).
23. a kind of rod connector (2), it is arranged on the end of sucker rod main body, and the sucker rod main body has by resin base
Center portion (11) and the overcoat (12) of the encirclement center portion that carbon fibre composite is constituted, it is characterised in that
The rod connector is mechanical Locking joint or adhered joint, and the mechanical Locking joint passes through mechanical caging
Mode be connected with the sucker rod main body, and the adhered joint by way of bonding with the sucker rod main body phase
Even.
24. rod connector (2) according to claim 23, wherein,
The mechanical Locking joint includes：
Inner sleeve (25), the inner sleeve surrounds and clamps the end of the sucker rod main body, and the periphery of the inner sleeve
Mask is tapered；
Push rod (21), end face of its end face against the inner sleeve；And
There is outer sleeve (24), the inner peripheral surface of the first end of the outer sleeve outer peripheral face identical with the inner sleeve (25) to bore
Degree, so that the outer peripheral face with the inner sleeve engages, and the second end of the outer sleeve utilizes internal thread and the push rod
(21) it is connected.
25. rod connector (2) according to claim 24, wherein,
After the mechanical Locking joint and the sucker rod main body complete to be connected, the first end of the inner sleeve (25) is from institute
The outlet for stating the first end of outer sleeve (24) is stretched out.
26. rod connector (2) according to claim 24, wherein,
The mechanical Locking joint also includes：
Locking nut (22), it is arranged between the outer sleeve and the push rod；And
Holding screw (23), it is used to lock the locking nut after the locking nut is locked.
27. rod connector (2) according to claim 24, wherein,
The hole with the cross section same shape of the sucker rod main body is provided with the longitudinal central portion of the push rod (21), so that
The sucker rod main body is passed through.
28. rod connector (2) according to claim 24, wherein,
It is respectively provided to a few gap (251,252) since the two ends of the inner sleeve, the gap is along the inner sleeve
Length direction extend through the part of the inner sleeve.
29. rod connector (2) according to claim 24, wherein,
Since the larger one end of the external diameter of the inner sleeve, peripherally disposed four the first gaps (251), described first
Two adjacent the first gaps all separate 90 degree of central angles in gap；
Since the less one end of the external diameter of the inner sleeve, peripherally disposed two the second gaps (252), described two
Second gap is spaced apart 180 degree central angle；
Second gap in two second gaps separates 45 with first gap in four first gaps
Spend central angle；And
The length in first gap is less than the length in second gap.
30. rod connector (2) according to claim 23, wherein,
The adhered joint includes：
Adapter body (34), it surrounds the end of the sucker rod main body；And
Adhesive, it is coated between the outer peripheral face of the inner peripheral surface of the adapter body and the sucker rod main body.
31. rod connector (2) according to claim 30, wherein,
The inner peripheral surface of the adapter body uses tapered staircase structural model (35).
32. rod connector (2) according to claim 30, wherein,
The outer surface of the end being connected with the sucker rod main body of the adhered joint is provided with waved flute (36), institute
State and carbon fiber and glass fiber compound material are tied with groove.
33. rod connector (2) according to claim 30, wherein,
Contain chopped carbon fiber yarn in described adhesive.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016102612957 | 2016-04-25 | ||
| CN201610261295 | 2016-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610826280.0A Pending CN107304656A (en) | 2016-04-25 | 2016-09-14 | Oil pumping system |
| CN201621059259.4U Active CN206246065U (en) | 2016-04-25 | 2016-09-14 | Oil pumping system and its rod connector |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621059259.4U Active CN206246065U (en) | 2016-04-25 | 2016-09-14 | Oil pumping system and its rod connector |
Country Status (2)
| Country | Link |
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| CN (2) | CN107304656A (en) |
| WO (1) | WO2017186021A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779612A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of carbon beam hoisting system underground pump dynagraoph test device and method |
| CN113090198A (en) * | 2021-05-20 | 2021-07-09 | 大庆市汇成科技开发有限公司 | Metal armoured fibre reinforced composite continuous sucker rod |
| CN115260000A (en) * | 2022-08-11 | 2022-11-01 | 山东亿科化学有限责任公司 | Methanol pretreatment method applied to polyphenyl ether monomer synthesis raw material |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304656A (en) * | 2016-04-25 | 2017-10-31 | 张建功 | Oil pumping system |
| CN108825145B (en) * | 2018-06-06 | 2020-03-10 | 中国石油天然气股份有限公司 | Sucker rod connecting device, sucker rod string and assembling method |
| CN109488219B (en) * | 2018-11-28 | 2024-02-02 | 胜利新大新材料股份有限公司 | Corrosion-resistant high-temperature-resistant composite material continuous sucker rod with multilayer structure and preparation process thereof |
| CN109798075B (en) * | 2019-02-10 | 2020-09-01 | 北京工商大学 | Fatigue-resistant steel oil pumping polished rod with multi-layer structure and processing technology thereof |
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Also Published As
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| WO2017186021A1 (en) | 2017-11-02 |
| CN206246065U (en) | 2017-06-13 |
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