CN103136409A - Modeling method for finite element analysis of oil device - Google Patents
Modeling method for finite element analysis of oil device Download PDFInfo
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- CN103136409A CN103136409A CN 201110405040 CN201110405040A CN103136409A CN 103136409 A CN103136409 A CN 103136409A CN 201110405040 CN201110405040 CN 201110405040 CN 201110405040 A CN201110405040 A CN 201110405040A CN 103136409 A CN103136409 A CN 103136409A
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Abstract
The invention discloses a modeling method for finite element analysis of an oil device. The modeling method for the finite element analysis of the oil device comprises the steps of a, simplifying a structure, b, processing load, and c, processing boundary conditions. According to hypothesis and simplification of an actual device, namely principal factors are considered and secondary factors are ignored, a mechanical model suitable for the finite element analysis of the oil device is established.
Description
Technical field
The present invention relates to a kind of modeling method of oil equipment finite element analysis.
Background technology
Oil-well rig produces along with the appearance of boring method, drilling technology, and respective change occurs along with the development of drilling technique again.Since entering 21 century, oil-well rig robotization, digitizing, intellectuality, level of IT application fast development.Rig whole drives oil-well rig (AC-GTO-AC) future development towards the ac variable frequency speed regulation electricity.Along with developing rapidly of alternating frequency conversion technique, the AC frequency conversion electric drive rig can replace AC-SCR-DC drive rig, this type rig has modern mechanical and drives rig and the unrivaled superior function of DC drive rig, will become the regeneration product of land and oil-well rig.
Oil-well rig refers to carry out the complete drilling outfit of oil and gas exploration, exploitation.In general, a whole set of rig is comprised of following eight large system equipments:
1. rotary system equipment
In order to rotate drilling tool in well, drive the drill bit fractured rock, rig has been equipped with rotary system.It mainly is comprised of rotating disk, water swivel, drill string and drill bit.In addition, water swivel, drill string and drill bit also play a part the circulation cleaner for high-pressure drilling fluid.Rotating disk is the core of rotary system, is one of three large work units of rig.Top drive drilling machine has been equipped with top-drive drilling, replaces rotating disk to drive drill string and bit.
2. circulation system equipment
For timely bottom-hole cleaning, cutting carring, the protection borehole wall, rig has been equipped with drilling fluid circulating system.Mainly contain drill pump, ground high pressure pipe joint, drill fluid purification equipment and drilling fluid deployment device (solid control equipment) etc.When adopting mud motor to creep into, the circulation system is also being undertaken provides cleaner for high-pressure drilling fluid, drives the task that down-hole turbodrill or helicoid hydraulic motor drive the drill bit fractured rock.Drill pump is the core of the circulation system, is one of three large work units of rig.
3. hoisting system equipment
Send to etc. for drilling, running casing, control the pressure of the drill and drill bit, rig has been equipped with hoisting system, with the auxiliary drilling operation of completing.This complete equipment mainly is comprised of well drilling hoist, assist brake, traveling system (as wire rope, overhead traveling crane, travelling sheave), hook and derrick.In addition, also be useful on the rig tool that removes operation and mechanized equipment (as suspension ring, elevator, slips, power tongs, thribble movement mechanism etc.).Winch is the core of hoisting system, is one of three large working machines of rig.
Above-mentioned three large system equipments are directly to serve drilling well to produce, and are three large work systems of rig.Winch, rotating disk, drill pump are called three large work units of rig.
4. power-driven system equipment
Power-driven system equipment refers to provide for a whole set of unit (three large work unit and other auxiliary units) equipment of energy, can be diesel engine and oil servicing facitities thereof, or interchange, direct current motor and power supply thereof, protection, opertaing device etc.
5. kinematic train equipment
Kinematic train equipment refers to connect engine and working machine, realizes the equipment of energy transmission, distribution and mode of motion conversion from driving arrangement to the work unit.It comprises slows down and car, reversing and gear etc.Mechanical drive pair commonly used in rig is mainly chain, bead apex, gear and universal shaft.In addition, many rigs have also adopted the type of belt drive such as hydrodynamic drive, hydrostatic transmission, electric transmission.
Control system and the monitoring Displaying Meter
Carry out work in order to command, control each unit cooperative ground, a whole set of rig is equipped with various control device, and have machinery controls, gas control system, electric control, hydraulic control system and electricity, gas, liquid commonly used mix control.Mechanical rig generally adopts centralized and unified gas control system.Modern drilling machine also is equipped with various drilling instruments and measurement-while-drilling system, and monitoring shows the working condition of the relevant system equipment in ground, measures downhole parameters, realizes well path control.
7. rig substructure
Base comprises drillingrig base and machine room base, is used for drilling outfit is installed, and facilitates the movement of drilling outfit.Drillingrig base is used for installing derrick, rotating disk, places setback area and necessary rig tool and driller's control cabinet, and majority is also wanted setting winch.Drillingrig base should be able to hold necessary well head set-up, therefore, enough height, area and rigidity must be arranged.The machine room base is mainly used in installing powerplant module and kinematic train equipment, therefore, also enough areas and rigidity will be arranged, and centering, smooth working and movement can be installed rapidly conveniently to guarantee calculator room equipment.
8. utility appliance
Complete rig also must have air feed equipment, auxiliary generating plant, blowout preventer equipment, rat holing equipment and auxiliary hoisting device, also must be equipped with heat-preserving equipment when the cold zone drilling well.
The pattern of oil-well rig is various, can be divided into: drive pattern, driving type, movement mode.
Be divided into by driving pattern: Diesel Driven, electricity drive, hydraulic-driven.Wherein electricity drives and is divided into again: alternating current driving, direct-current drive, alternating-current variable frequency power drive.
Be divided into by driving type: chain drive, the transmission of V band, gear drive.
Be divided into by the movement mode: packaged formula, self-propelled, pulling type.
Over more than 40 year, process imitated, that introduce digestion, absorb that the China's oil rig has experienced has now entered take independent development as the main stage.Over nearly 10 years, the China's oil drilling rig technique obtains developing the most fast, and manufacturing capacity is greatly improved.The various rigs that China rig manufacturing plant makes satisfy the needs of petroleum exploration in China development self substantially, successively developed the oil-well rig that is suitable for land, desert and ocean operation, drive technology has developed into mechanical drive, direct current transmission, AC frequency conversion electric transmission and mechanical, electrical Composite Transmission and has developed simultaneously.China has formed the ability of 200, year manufacturing rig, has become global maximum rig manufacturing nation.The China Petroleum that develops into of China's oil drilling rig technique and manufacturing capacity is implemented low cost strategy, and participation competition in the international market and assurance China's oil are had laid a good foundation safely.
Modeling process is a technical matters that difficulty is larger, is also one of committed step in the oil equipment finite element analysis.Because the structure of derrick is comparatively complicated, the practical structures of derrick is simplified, set up a simplification, near the mechanical model of practical structures, based on this this derrick is carried out model analysis.
When oil equipment was carried out finite element analysis, the problem that at first runs into was supposed physical device exactly and is simplified, and namely considered principal element, ignored secondary cause, thereby set up the mechanical model that is suitable for finite element analysis.A good mechanical model should satisfy following two:
(1) model can reflect the real bearing state of equipment substantially, and analysis result can be satisfied with requirement of engineering;
(2) the model Consideration is as far as possible few, and research object is simple, so that the workload when reducing finite element analysis.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of modeling method of oil equipment finite element analysis is provided, the modeling method of this oil equipment finite element analysis is by supposing physical device and simplifying, namely consider principal element, ignore secondary cause, thereby set up the mechanical model that is suitable for the oil equipment finite element analysis.
Purpose of the present invention is achieved through the following technical solutions: the modeling method of oil equipment finite element analysis comprises the following steps:
(a) at first, carry out designs simplification;
(b) then, carrying out load processes;
(c) last, carry out boundary condition treatment.
The concrete steps of described step (a) are: according to the principles such as actual forced status, symmetry and skew-symmetry of equipment, guaranteeing under the substantially constant prerequisite of equipment stress, the structure of simplified apparatus, reach the purpose that reduces amount of calculation, reduces the data processing as far as possible.
The concrete steps of described step (b) are: should consider to cause the main external applied load of structural stress state variation, some load less important and calculation of complex can be ignored or simplify processing.
The concrete steps of described step (c) are: utilize the various boundary processing methods that program of finite element provides to simulate power and the displacement boundary conditions of physical device as far as possible, will guarantee that in simulation process model is structure, and can not be mechanism.
In sum, the invention has the beneficial effects as follows: by physical device being supposed and being simplified, namely consider principal element, ignore secondary cause, thereby set up the mechanical model that is suitable for the oil equipment finite element analysis.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The modeling method of the oil equipment finite element analysis that the present invention relates to comprises the following steps:
(a) at first, carry out designs simplification;
(b) then, carrying out load processes;
(c) last, carry out boundary condition treatment.
The concrete steps of described step (a) are: according to the principles such as actual forced status, symmetry and skew-symmetry of equipment, guaranteeing under the substantially constant prerequisite of equipment stress, the structure of simplified apparatus, reach the purpose that reduces amount of calculation, reduces the data processing as far as possible.
The concrete steps of described step (b) are: should consider to cause the main external applied load of structural stress state variation, some load less important and calculation of complex can be ignored or simplify processing.
The concrete steps of described step (c) are: utilize the various boundary processing methods that program of finite element provides to simulate power and the displacement boundary conditions of physical device as far as possible, will guarantee that in simulation process model is structure, and can not be mechanism.
Said method is namely considered principal element, is ignored secondary cause by physical device being supposed and being simplified, thereby sets up the mechanical model that is suitable for the oil equipment finite element analysis.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations that above embodiment is done are within all falling into protection scope of the present invention.
Claims (4)
1. the modeling method of oil equipment finite element analysis, is characterized in that, comprises the following steps:
(a) at first, carry out designs simplification;
(b) then, carrying out load processes;
(c) last, carry out boundary condition treatment.
2. the modeling method of oil equipment finite element analysis according to claim 1, it is characterized in that, the concrete steps of described step (a) are: according to the principles such as actual forced status, symmetry and skew-symmetry of equipment, guaranteeing under the substantially constant prerequisite of equipment stress, the structure of simplified apparatus, reach the purpose that reduces amount of calculation, reduces the data processing as far as possible.
3. the modeling method of oil equipment finite element analysis according to claim 1, it is characterized in that, the concrete steps of described step (b) are: should consider to cause the main external applied load of structural stress state variation, some load less important and calculation of complex can be ignored or simplify processing.
4. the modeling method of oil equipment finite element analysis according to claim 1, it is characterized in that, the concrete steps of described step (c) are: utilize the various boundary processing methods that program of finite element provides to simulate power and the displacement boundary conditions of physical device as far as possible, to guarantee that in simulation process model is structure, and can not be mechanism.
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| CN 201110405040 CN103136409A (en) | 2011-11-28 | 2011-11-28 | Modeling method for finite element analysis of oil device |
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| CN 201110405040 CN103136409A (en) | 2011-11-28 | 2011-11-28 | Modeling method for finite element analysis of oil device |
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| CN103136409A true CN103136409A (en) | 2013-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107679302A (en) * | 2017-09-21 | 2018-02-09 | 北京众绘虚拟现实技术研究院有限公司 | A kind of continuous deformation restoration methods based on the analysis of inverse finite element optimization |
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2011
- 2011-11-28 CN CN 201110405040 patent/CN103136409A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107679302A (en) * | 2017-09-21 | 2018-02-09 | 北京众绘虚拟现实技术研究院有限公司 | A kind of continuous deformation restoration methods based on the analysis of inverse finite element optimization |
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Application publication date: 20130605 |