CN102818084A - Displacement compensation device for oil conveying pipeline of offshore platform - Google Patents
Displacement compensation device for oil conveying pipeline of offshore platform Download PDFInfo
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- CN102818084A CN102818084A CN2012102611161A CN201210261116A CN102818084A CN 102818084 A CN102818084 A CN 102818084A CN 2012102611161 A CN2012102611161 A CN 2012102611161A CN 201210261116 A CN201210261116 A CN 201210261116A CN 102818084 A CN102818084 A CN 102818084A
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- compensation device
- offshore platform
- swing
- conveying pipeline
- transport pipeline
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Abstract
The invention discloses a displacement compensation device for an oil conveying pipeline of an offshore platform, which is used for reducing or avoiding influence of a marine environment on vibration of the oil conveying pipeline. The displacement compensation device comprises a corrugated pipe, a vibrating pair and a sliding pair, wherein the corrugated pipe is mounted in the sliding pair; the vibrating pair is welded with the sliding pair; the vibrating pair has an effect of universal adjustment, and the sliding pair has an effect of telescopic compensation, so that influence of the marine environment on vibration of the oil conveying pipeline is reduced or avoided. The displacement compensation device is applied to the oil conveying pipeline of the offshore platform, and can adapt to special environment and working condition on the ocean, effectively compensates telescopic displacement of the oil conveying pipeline going with the stream, protects the oil conveying pipeline to be used safely and protects the marine environment against pollution by crude oil leakage. The pipeline displacement compensation device is light in weight, convenient to mount, favorable for platform construction and high in operating efficiency. A vibrating pipe and a compensating pipe are flexible to move, the compensation effects are excellent, and impact damage on the oil conveying pipeline can be effectively avoided, and the production cost is reduced.
Description
Technical field
The invention belongs to the bit shift compensation facility of petroleum industry offshore platform oil transport pipeline, offshore platform oil transport pipeline bit shift compensation device particularly reduces or avoids the ocean environment influence that swing causes to oil transport pipeline.
Background technique
The petroleum pipeline of ocean platform or title oil transport pipeline adopt steel mono-layer tube structure, are delivered to central platform by each satellite platform.Be " firmly " between petroleum pipeline and standpipe stake and oil recovery well and be connected, promptly do not have compensation device; Right trestle and production platform are to flexibly connect.When platform is met the abominable or strong external force collision of sea situation, just can cause the relative swing between standpipe stake and the production platform.If amplitude of fluctuation is excessive, will cause line break, fatigue damage, influence ordinary production, particularly behind the crude oil leakage, also can have influence on ocean environment.Given this, corrugated expansion joint has been installed by oil recovery enterprise on petroleum pipeline, and with the displacement amount of compensation pipes, this technology has obtained certain effect.But up till now for it, still there is the problem that some fail to solve in this compensator: 1, tired, corrosion failure.The ripple tube wall is thin, vibrates fatiguability for a long time, adds that medium contains Cl
-, H
2S, corrosivity is strong, causes body to break and produces leakage.2, bellows and flange connections fatigue fracture.Because compensator is installed in the corner of petroleum pipeline, compensating platform rocks the deflection that causes, is prone to cause the fatigue fracture of bellows and flange connections.3, bellows produces permanent deformation.Because bellows has certain bit shift compensation restriction, after surpassing the elasticity of itself, bellows will produce permanent deformation, can not reset the compensation effect variation when compensation rate is excessive.The oil transport pipeline of offshore platform needs the good offshore platform oil transport pipeline bit shift compensation device of a kind of effect.
Summary of the invention
The purpose of this invention is to provide offshore platform oil transport pipeline bit shift compensation device, making between oil transport pipeline and standpipe stake and the oil recovery well also becomes flexible connection, eliminates the influence of ocean environment to oil transport pipeline.The protection production facility is protected the marine environment.
Technological scheme of the present invention is: offshore platform oil transport pipeline bit shift compensation device comprises bellows, also is provided with swing pair and sliding pair, and bellows is installed in the sliding pair, and swing is secondary welds with sliding pair.Swing is secondary to play the universal regulated effect, and sliding pair plays the flexible compensation effect, makes oil transport pipeline reduce or avoid the influence of suffered ocean environment.
Compared with prior art; The present invention has following significant effect: the present invention has the secondary and two kinds of compensation mechanisms of sliding pair of swing; The secondary universal regulated effect that can realize pipeline of swing; Be that swing pipe can be realized 360 ° of direction swings of circumference along ball cup, its amplitude of oscillation is ± 15 °, and the compensation pipeline is with the swing of trestle any direction.In order to guarantee the sealing between bulb and the ball cup and guarantee rotating freely of bulb that in ball cup, designed the ball face sealing circle, this can enlarge sealing surface on the one hand, effectively strengthens the sealing effect of convection cell; Simultaneously, the bulb of swing pipe bottom is soft the cooperation with the inner ball surface of ball face sealing circle, and this makes it can realize good sealing effect, does not cause it to press too deadly again, and swing was lost efficacy.By the sliding pair that expansion pipe, compensating cylinder, bellows etc. are formed, expansion pipe can slide along the inner chamber of compensating cylinder, and its maximum displacement is 300mm.Between compensating cylinder and expansion pipe, bellows is housed, is used for the fluid between sealing compensation tube and the expansion pipe and has the flexible compensation effect.Owing to do not adopt sealing materials such as rubber here, but directly be connected with compensating cylinder with expansion pipe with bellows, realize static seal, so sealing is reliable, be difficult for leaking.When considering cost of material and material capability, selected for use 40Cr and 20Cr steel to manufacture this device respectively through heat treatment quenching and tempering, promptly guaranteed the application performance of device, appropriateness reduces cost of material again.This device is applied on the oil transport pipeline of ocean platform; Can tackle deepwater particular surroundings and operating conditions; Can effectively compensate the telescopic displacement amount that oil transport pipeline drifts with the tide, the safe handling of protection oil transport pipeline has protected ocean environment to exempt from the pollution of crude oil leakage again.This piping displacement compensation device is in light weight, and is easy for installation, is beneficial to platform construction, improved operating efficiency.Limited ring is housed in the device, can avoids bellows excessively to stretch, guarantee compensation effect; Swing pipe and expansion pipe motion are flexible, and compensation effect is desirable, and the impact failure that can effectively avoid oil transport pipeline to receive has reduced cost of production.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description.Referring to accompanying drawing, offshore platform oil transport pipeline bit shift compensation device comprises bellows 9, and this device also is provided with swing pair and sliding pair, and bellows 9 is installed in the sliding pair, and swing is secondary welds with sliding pair.The swing pair comprises ball cup, swing pipe 2, ball face sealing circle 6; The bulb of swing pipe 2 is installed in the ball cup; Ball face sealing circle 6 is housed between bulb and ball cup, and at the installation sealing gasket suitable for reading 4 and the sealing gland 3 of ball cup, sealing gland 3 is fixing through surely following closely 5 with ball cup.Swing pipe 2 one ends are bulbs, and the other end body is connected with last adpting flange 1; Ball face sealing circle 6 profile tubulars, its inner chamber is a hemisphere, is installed in the bulb two ends of swing pipe 2.Because of containing certain amount of H in the flowing medium in the oil transport pipeline
2S, Cl
-Deng, ball face sealing circle 6 is selected the filling teflon for use, filled glass fiber, MoS
2And graphite, it has good acidproof and oil resistance, and has self lubricity; Concrete material behavior is: friction factor is 0.16～0.18, and elongation percentage is 250%, tensile strength 19.6MPa; Load deformation 5.6%, temperature range :-176～316 ℃, pressure rating: 35MPa.Sliding pair comprises compensating cylinder 7 and expansion pipe 11, and expansion pipe 11 is installed in the compensating cylinder 7, and bellows 9 is installed between compensating cylinder 7 and expansion pipe 11, and the lower end port of compensating cylinder 7 is equipped with seal sleeve.Expansion pipe 11 1 ends are provided with step, and limited ring 8 is installed above step, between step below and the seal sleeve bellows 9 are installed; The other end is connected with following adpting flange.Circle is installed dust ring 10 in the seal sleeve.Swing the lower end of secondary ball cup and the upper end welding of sliding pair compensating cylinder 7.Swing pipe 2 adopts the 40Cr steel to manufacture through heat treatment quenching and tempering; Compensating cylinder 7, expansion pipe 11, limited ring 8, sealing gland 3, last adpting flange 1 and following adpting flange all adopt the 20Cr steel to manufacture through heat treatment quenching and tempering; Bellows 9 adopts stainless steel 316L to manufacture.The 40Cr steel contains: C:0.42-0.49%, Si:0.17-0.37%, Mn:0.50-0.80%, Cr:0.80-1.10%.Yield strength σ s=540MPa, tensile strength sigma b=735MPa.The 20Cr steel contains C:0.18-0.24%, Si:0.17-0.37%, Mn:0.50-0.80%, Cr:0.70-1.00%.Yield strength σ s=540MPa, tensile strength sigma b=835MPa.Compare these two kinds of materials, the yield strength of 20Cr and tensile strength and 40Cr are suitable, all have excellent comprehensive performances.Welding performance and the metal toughness of 20Cr are superior to 40Cr, but the Quenching Treatment hardness of 40Cr is higher than 20Cr.Therefore it is modified that main body materials such as compensating cylinder 7, expansion pipe 11, limited ring 8, sealing gland 3 adopt 20Cr, and toughness of material is stronger, is difficult for producing plastic deformation.Swing pipe 2 adopts 40Cr, and carries out Quenching Treatment, and its hardness can reach HRC50～55, and antiwear property is good, and it is less to wear and tear, and guarantees sealability.Because the present invention has the secondary and two kinds of bit shift compensation mechanisms of sliding pair of swing, the internal stress that does not exist other external force except that fuel transfer pressure to cause during work is so only consider that hydrodynamic pressure gets final product when it is carried out force analysis.According to the calculating of thick walled tube formula and caliber, pipe thickness, the secondary shearing stress here of swing, the yield strength σ s=540MPa of contrast 40Cr, its intensity satisfies working condition requirement.
Installation method
This oil transport pipeline bit shift compensation device must be according to the entire length of compensation device before installing, the pipeline of intercepting equal length from the pipeline, the last adpting flange 1 and the identical piping flange of following adpting flange of welding then and compensation device.Be ready to flange gasket and 16 cover bolt, nut and spring washers.One end of this compensation device is connected earlier on the piping flange, connects the other end of compensation device again, must fill up flange gasket during installation.
Claims (7)
1. offshore platform oil transport pipeline bit shift compensation device comprises bellows (9), it is characterized in that, this device also is provided with swing pair and sliding pair, and bellows (9) is installed in the sliding pair, and swing is secondary welds with sliding pair.
2. offshore platform oil transport pipeline bit shift compensation device according to claim 1; It is characterized in that; Said swing pair comprises ball cup, swing pipe (2), ball face sealing circle (6), and the bulb of swing pipe (2) is installed in the ball cup, and ball face sealing circle (6) is housed between bulb and ball cup; At the installation sealing gasket suitable for reading (4) and the sealing gland (3) of ball cup, sealing gland (3) is fixing through steady nail (5) with ball cup.
3. offshore platform oil transport pipeline bit shift compensation device according to claim 2 is characterized in that, said swing pipe (2) one ends are bulbs, and the other end body is connected with last adpting flange (1); Ball face sealing circle (6) profile tubular, its inner chamber is a hemisphere, is installed in the bulb two ends of swing pipe (2).
4. offshore platform oil transport pipeline bit shift compensation device according to claim 2; It is characterized in that; Said sliding pair comprises compensating cylinder (7) and expansion pipe (11); Expansion pipe (11) is installed in the compensating cylinder (7), between compensating cylinder (7) and expansion pipe (11), bellows (9) is installed, and the lower end port of compensating cylinder (7) is equipped with seal sleeve.
5. offshore platform oil transport pipeline bit shift compensation device according to claim 4 is characterized in that, said expansion pipe (11) one ends are provided with step, and limited ring (8) is installed above step, between step below and the seal sleeve bellows (9) is installed; The other end is connected with following adpting flange.
6. offshore platform oil transport pipeline bit shift compensation device according to claim 5 is characterized in that, circle is installed dust ring (10) in the said seal sleeve.
7. according to claim 2 or 4 described offshore platform oil transport pipeline bit shift compensation devices, it is characterized in that the upper end welding of the lower end of the secondary ball cup of said swing and sliding pair compensating cylinder (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102611161A CN102818084A (en) | 2012-07-26 | 2012-07-26 | Displacement compensation device for oil conveying pipeline of offshore platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102611161A CN102818084A (en) | 2012-07-26 | 2012-07-26 | Displacement compensation device for oil conveying pipeline of offshore platform |
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|---|---|
| CN102818084A true CN102818084A (en) | 2012-12-12 |
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ID=47302400
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102611161A Pending CN102818084A (en) | 2012-07-26 | 2012-07-26 | Displacement compensation device for oil conveying pipeline of offshore platform |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295278A (en) * | 2013-07-19 | 2015-01-21 | 中国石油化工股份有限公司 | Thermal recovery compensation sealed pipe column |
| CN104806841A (en) * | 2015-04-16 | 2015-07-29 | 江苏方圆波纹管制造有限公司 | Novel three-direction large-displacement expansion joint |
| CN108278431A (en) * | 2018-03-13 | 2018-07-13 | 江苏五星波纹管有限公司 | A kind of spherical shape corrugated expansion joint and its production method |
| CN114893636A (en) * | 2022-04-07 | 2022-08-12 | 中海油能源发展股份有限公司 | High-temperature and high-pressure compensation pipeline device of ocean mobile heat injection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229033Y (en) * | 1995-06-13 | 1996-06-12 | 范国锋 | Three-D compensator |
| JPH09112772A (en) * | 1995-10-23 | 1997-05-02 | Kowa Kogyosho:Kk | Expansion pipe joint |
| CN2826119Y (en) * | 2005-08-18 | 2006-10-11 | 江苏百新波纹管有限公司 | Universal spherical compensator |
| CN102359683A (en) * | 2011-10-12 | 2012-02-22 | 陈墅庚 | Plunger-type double-safety pipeline compensator |
-
2012
- 2012-07-26 CN CN2012102611161A patent/CN102818084A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229033Y (en) * | 1995-06-13 | 1996-06-12 | 范国锋 | Three-D compensator |
| JPH09112772A (en) * | 1995-10-23 | 1997-05-02 | Kowa Kogyosho:Kk | Expansion pipe joint |
| CN2826119Y (en) * | 2005-08-18 | 2006-10-11 | 江苏百新波纹管有限公司 | Universal spherical compensator |
| CN102359683A (en) * | 2011-10-12 | 2012-02-22 | 陈墅庚 | Plunger-type double-safety pipeline compensator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295278A (en) * | 2013-07-19 | 2015-01-21 | 中国石油化工股份有限公司 | Thermal recovery compensation sealed pipe column |
| CN104806841A (en) * | 2015-04-16 | 2015-07-29 | 江苏方圆波纹管制造有限公司 | Novel three-direction large-displacement expansion joint |
| CN108278431A (en) * | 2018-03-13 | 2018-07-13 | 江苏五星波纹管有限公司 | A kind of spherical shape corrugated expansion joint and its production method |
| CN108278431B (en) * | 2018-03-13 | 2024-02-20 | 江苏五星波纹管有限公司 | Spherical corrugated pipe compensator and production method thereof |
| CN114893636A (en) * | 2022-04-07 | 2022-08-12 | 中海油能源发展股份有限公司 | High-temperature and high-pressure compensation pipeline device of ocean mobile heat injection system |
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Application publication date: 20121212 |