CN103485738B - A kind of horizontal well Cutting movement analogue experiment installation and experimental technique - Google Patents
A kind of horizontal well Cutting movement analogue experiment installation and experimental technique Download PDFInfo
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- CN103485738B CN103485738B CN201310470427.3A CN201310470427A CN103485738B CN 103485738 B CN103485738 B CN 103485738B CN 201310470427 A CN201310470427 A CN 201310470427A CN 103485738 B CN103485738 B CN 103485738B
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Abstract
The present invention relates to for simulating oil drilling, a kind of horizontal well Cutting movement analogue experiment installation of CBM Drilling and experimental technique, this device includes borehole fluid system, Cutting movement system, landwaste feed system, dynamical system, data handling system and landwaste recovery system.Borehole fluid system is connected to form by liquid storage tank, motor, centrifugal pump, effusion meter, butterfly valve, Cutting movement system by adapter, glass tubing, pvc pipe, take rock instrument and eccentric triangular plate etc. and constitute, landwaste feed system is by feeding screw and adds landwaste device and forms, dynamical system is made up of buncher, change-speed gearing, and landwaste recovery system is made up of recovery tube, filter and landwaste recovery pond.Use apparatus of the present invention and method can carry out visual eye-level well Cutting movement situation, and the degree of eccentricity between different displacements, drill string rotating speed, drill string and well, landwaste amount and the impact on horizontal well Cutting movement rule of the landwaste particle diameter can be simulated, experimental stand is simple and practical, cost is relatively low.
Description
Technical field
The present invention relates to for simulating oil drilling, the experimental provision of CBM Drilling and experimental technique, this experimental provision can carry out a kind of horizontal well Cutting movement analogue experiment installation and the experimental technique of visual observation.
Background technology
In oil, coal bed gas drilling process, for effectively increasing the bare area of oil-gas Layer, improving recovery ratio, raising single well productivity, raising Area of a well, it is achieved " few well high yield ", often use horizontal well drilling technology.Horizontal well is that hole angle reaches or close to 90 °, well bore creeps into the well of certain length along horizontal direction, and sometimes for the needs that certain is special, hole angle is more than 90 °, and this is that the migration of horizontal well landwaste brings technical barrier.Horizontal well is widely used in oil, CBM Drilling because of its advantage, simultaneously takes the problems such as rock because of horizontal well and governs the development of horizontal well drilling technology.
Owing to the reason of drill string gravity makes drill string lie low the borehole wall under horizontal segment, forming eccentric annulus, very easily cause landwaste deposition at the first-class changeover portion of drilling rod connecting, talus deposit is crossed and is formed cutting bed at most.Annular Cuttings is piled up and is easily caused drill string high torque and high-drag, adheres to bit freezing, causes setting of casing and well cementation difficulty, and drill tool wear is big, and logger is gone into the well the problems such as difficulty.As Sichuan province horizontal well is not smooth owing to taking sand, downhole debris is piled into bed, causes drilling tool stuck, causes and bores on rear side of well filling.For preventing the generation of above-mentioned accident, understand fully horizontal well Cutting movement mechanism and how to prevent talus deposit from becoming bed to become the technical barrier needing solution badly.
Therefore, being badly in need of one can simulate, and the experimental provision of energy visual observation horizontal well Cutting movement rule.This device includes borehole fluid system, Cutting movement system, landwaste feed system, dynamical system, data handling system and landwaste recovery system.Use this experimental provision and method the different rod rotation speed of qualitative investigation, coal powder quantity of bore, flow, the drilling rod degree of eccentricity and drilling fluid when landwaste diameter can take rock problem；Use this experimental provision and method can carry out visual eye-level well Cutting movement rule, rock problem will be taken for solution horizontal well and reliable foundation is provided.
Summary of the invention
It is an object of the invention to: for overcoming the deficiencies in the prior art, a kind of horizontal well Cutting movement analogue experiment installation and experimental technique carrying out visual observation and simulating various working of special offer.
For reaching above-mentioned purpose, this invention address that this problem be the technical scheme is that a kind of horizontal well Cutting movement analogue experiment installation and experimental technique, including borehole fluid system, Cutting movement system, landwaste feed system, dynamical system, data handling system and landwaste recovery system.It is characterized in that: described borehole fluid system is by liquid storage tank, outlet shutoff valve, motor, centrifugal pump, Pressure gauge, effusion meter, butterfly valve and steel wire tube are sequentially connected with composition, described Cutting movement system is by adapter, seal bearing, glass tubing, through hole ring flange, bearing, pvc pipe, pvc pipe joint, take rock instrument, eccentric triangular plate, blind plate and bracing frame are constituted, described landwaste feed system is by feeding screw and adds landwaste device and forms, described dynamical system is by buncher, change-speed gearing and fixed mount composition, described data handling system is by high-speed camera, spider and computer composition, described landwaste recovery system is by recovery tube, filter, landwaste recovery pond and stop valve are sequentially connected with composition, recovery tube is connected with the glass tubing port of export.
Described adapter osculum end is connected with steel wire tube, equipped with sealing bearing inside adapter big opening end, seals bearing and is fixed on pvc pipe low order end by interference fit, for preventing steel wire tube from rotating with the rotation of pvc pipe；Described glass tubing adopts pressure, transparent material, can directly observe the process of Cutting movement, reach visual requirement, glass tubing two ends are with flange arrangement, being bolted between glass tubing, second glass tubing two ends is respectively provided with left Pressure gauge and right Pressure gauge, installs pvc pipe in glass tubing；The described landwaste device that adds is connected with feeding screw, adds landwaste amount by what control to add landwaste device, can reach the coal powder quantity of bore that simulation drilling well produces；Described eccentric triangular plate is cylindric, being welded with three supports outside cylinder, between each support, angle is 120 °, installs pvc pipe in eccentric triangular plate, gap between eccentric triangular plate and pvc pipe is 2～3mm, realizes the degree of eccentricity of eccentric triangular plate by controlling the length of support.
The method using said apparatus dummy level well Cutting movement, mainly comprises the steps that
1) drilling fluid is provided by borehole fluid system to pvc pipe, with the drilling fluid in dummy level well shaft；
2) landwaste amount is added by what control to add landwaste device, the coal powder quantity of bore that simulation drilling well produces can be reached, record bottom left pressure gauge reading, right pressure gauge reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
3) drilling fluid displacement is regulated, recording flowmeter reading, simulation drilling fluid difference can be reached and return rock situation of taking under speed, and record bottom left pressure gauge reading, right pressure gauge reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
4) degree of eccentricity of pvc pipe is changed by changing different eccentric triangular plates, record bottom left pressure gauge reading, right pressure gauge reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
5) rotating speed of pvc pipe is changed by regulating motor, record bottom left pressure gauge reading, right pressure gauge reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
6) record do not use left pressure gauge reading when taking rock instrument, right pressure gauge reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop.
Compared with prior art, it provides the benefit that the present invention: 1) can carry out visual eye-level well Cutting movement situation；2) this experimental provision can simulate the degree of eccentricity between different displacements, drill string rotating speed, drill string and well, landwaste amount and the impact on horizontal well Cutting movement rule of the landwaste particle diameter；3) can install on drill string and take rock instrument, can simulate and the transport conditions taking rock when taking rock instrument and be fitted without taking rock instrument is installed；4) using the transport conditions of the recordable each landwaste of high-speed camera, and with computer, data are processed, experimental result is accurate；5) experimental stand simple in construction, cost are relatively low, but can meet the demand of experiment under various working.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of horizontal well Cutting movement analogue experiment installation of the present invention；
Fig. 2 is A place enlarged drawing in Fig. 1；
Fig. 3 is B place enlarged drawing in Fig. 1；
Fig. 4 is C place enlarged drawing in Fig. 1.
nullIn figure: 1. glass tubing，2.PVC manages，3. left Pressure gauge，4. feeding screw，5. add landwaste device，6. right Pressure gauge，7.PVC joint 8. through hole ring flange，9. bearing，10. change-speed gearing，11. buncher，12. steel wire tube，13. adapter 14. butterfly valve，15. effusion meter，16. Pressure gauge，17. centrifugal pump，18. motor，19. outlet shutoff valve，20. liquid storage tank，21. filter，22. landwaste recovery pond，23. sealing bearing，24. fixed mount，25. the glass tubing port of export，26. recovery tube，27. glass tubing adds sand mouth，28. take rock instrument，29. eccentric triangular plate，30. bracing frame，31. blind plate，32. stop valve，33. high-speed camera，34. spider，35. computer.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
nullAs shown in figures 1-4，A kind of horizontal well Cutting movement analogue experiment installation and experimental technique，Including borehole fluid system、Cutting movement system、Landwaste feed system、Dynamical system and landwaste recovery system five part，It is characterized in that: described borehole fluid system is by liquid storage tank 20、Outlet shutoff valve 19、Motor 18、Centrifugal pump 17、Pressure gauge 16、Effusion meter 15、Butterfly valve 14 and steel wire tube 12 are sequentially connected with composition，Described Cutting movement system is by adapter 13、Seal bearing 23、Glass tubing 1、Through hole ring flange 8、Bearing 9、Pvc pipe 2、Pvc pipe joint 7、Take rock instrument 28、Eccentric triangular plate 29、Blind plate 31 and bracing frame 30 are constituted，Described landwaste feed system is by feeding screw 4 and adds landwaste device 5 and forms，Described dynamical system is by buncher 11、Change-speed gearing 10 and fixed mount 24 form，Described data handling system is by high-speed camera 33、Spider 34 and computer 35 form，Described landwaste recovery system is by recovery tube 26、Filter 21、Landwaste recovery pond 22 and stop valve 32 are sequentially connected with composition，Recovery tube 26 is connected with the glass tubing port of export 25.
Described adapter 13 osculum end is connected with steel wire tube 12, equipped with sealing bearing 23 inside adapter 13 big opening end, seals bearing 23 and is fixed on pvc pipe 2 low order end by interference fit, for preventing steel wire tube 12 from rotating with the rotation of pvc pipe 2；Described glass tubing 1 adopts pressure, transparent material, can directly observe the process of Cutting movement, reach visual requirement, glass tubing 1 two ends are with flange arrangement, it is bolted between glass tubing 1,3rd glass tubing and second glass tubing are respectively provided with left Pressure gauge 3 and right Pressure gauge 6, install pvc pipe 2 in glass tubing 1；The described landwaste device 5 that adds is connected with feeding screw 4, adds landwaste amount by what control to add landwaste device 5, can reach the coal powder quantity of bore that simulation drilling well produces；Described eccentric triangular plate 29 is cylindric, being welded with three supports outside cylinder, between each support, angle is 120 °, installs pvc pipe 2 in eccentric triangular plate 29, gap between eccentric triangular plate 29 and pvc pipe 2 is 2～3mm, realizes the degree of eccentricity of eccentric triangular plate 29 by controlling the length of support.
The method using said apparatus dummy level well Cutting movement, mainly comprises the steps that
1) drilling fluid is provided by borehole fluid system to pvc pipe 2, with the drilling fluid in dummy level well shaft；
2) landwaste amount is added by what control to add landwaste device 5, the coal powder quantity of bore that simulation drilling well produces can be reached, record bottom left Pressure gauge 3 reading, right Pressure gauge 6 reading, add the weight of landwaste in landwaste amount, filter 21, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
3) drilling fluid displacement is regulated, recording flowmeter 15 reading, can reach to take rock situation under dummy level well drilling fluid different displacements, and record bottom left Pressure gauge 3 reading, right Pressure gauge 6 reading, add the weight of landwaste in landwaste amount, filter 21, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
4) degree of eccentricity of pvc pipe 2 is changed by changing different eccentric triangular plates 29, record bottom left Pressure gauge 3 reading, right Pressure gauge 6 reading, add the weight of landwaste in landwaste amount, filter 21, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；
5) rotating speed of pvc pipe 2 is changed by regulating buncher 11, record bottom left Pressure gauge 3 reading, right Pressure gauge 6 reading, add the weight of landwaste in landwaste amount, filter 21, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop.
When starting to test, drilling fluid in liquid storage tank 20 enters pvc pipe 2 through outlet shutoff valve 19, centrifugal pump 17, butterfly valve 14 and steel wire tube 12, the drilling fluid of pvc pipe 2 flows into glass tubing 1, in the process, the recovered pipe 26 of landwaste that drilling fluid carries from adding landwaste device 5 addition is back to landwaste recovery pond 22, is provided with stop valve 32, opens stop valve 32 between landwaste recovery pond 22 and liquid storage tank 20, drilling liquid flow is to liquid storage tank 20, it is achieved that recycling of drilling fluid.By the situation of horizontal well Cutting movement under the degree of eccentricity between change discharge capacity, drill string rotating speed, drill string and well, landwaste amount and landwaste particle diameter observable various working.Experimentation record left Pressure gauge 3 reading, right Pressure gauge 6 reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop.
Claims (1)
- null1. a horizontal well Cutting movement analogue experiment installation，Including borehole fluid system、Cutting movement system、Landwaste feed system、Dynamical system、Data handling system and landwaste recovery system six part，It is characterized in that: described borehole fluid system is by liquid storage tank (20)、Outlet shutoff valve (19)、Motor (18)、Centrifugal pump (17)、Pressure gauge (16)、Effusion meter (15)、Butterfly valve (14) and steel wire tube (12) are sequentially connected with composition，Described Cutting movement system is by adapter (13)、Seal bearing (23)、Glass tubing (1)、Through hole ring flange (8)、Bearing (9)、Pvc pipe (2)、Pvc pipe joint (7)、Take rock instrument (28)、Eccentric triangular plate (29)、Blind plate (31) and bracing frame (30) are constituted，Described landwaste feed system is by feeding screw (4) and adds landwaste device (5) and forms，Described dynamical system is by buncher (11)、Change-speed gearing (10) and fixed mount (24) composition，Described data handling system is by high-speed camera (33)、Spider (34) and computer (35) composition，Described landwaste recovery system is by recovery tube (26)、Filter (21)、Landwaste recovery pond (22) and stop valve (32) are sequentially connected with composition，Recovery tube (26) is connected with the glass tubing port of export (25)；Described adapter (13) is ladder barrel shape, osculum end is connected with steel wire tube (12), equipped with sealing bearing (23) inside big opening end, seal bearing (23) and be fixed on pvc pipe (2) low order end by interference fit, be used for preventing steel wire tube (12) from rotating with the rotation of pvc pipe (2)；Described eccentric triangular plate (29) is cylindric, three supports it are welded with outside cylinder, between each support, angle is 120 °, in eccentric triangular plate (29), pvc pipe (2) is installed, gap between eccentric triangular plate (29) and pvc pipe (2) is 2～3mm, realizes the degree of eccentricity of eccentric triangular plate (29) by controlling the length of support；Process of the test record left Pressure gauge (3) reading, right Pressure gauge (6) reading, add landwaste amount, the weight of landwaste, track and cutting bed granule settling height again after starting in filter (21), use data handling system to analyze Cutting movement situation；Adopt the test method of horizontal well Cutting movement analogue experiment installation, comprise the following steps:1), drilling fluid is provided by borehole fluid system to pvc pipe (2), with the drilling fluid in dummy level well shaft；2), landwaste amount is added by what control to add landwaste device, the coal powder quantity of bore that simulation drilling well produces can be reached, record bottom left Pressure gauge (3) reading, right Pressure gauge (6) reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；3), drilling fluid displacement is regulated, recording flowmeter reading, simulation drilling fluid difference can be reached and return rock situation of taking under speed, and record bottom left Pressure gauge (3) reading, right Pressure gauge (6) reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；4) degree of eccentricity of pvc pipe (2), is changed by changing different eccentric triangular plates, record bottom left Pressure gauge (3) reading, right Pressure gauge (6) reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；5) rotating speed of pvc pipe (2), is changed by regulating buncher (11), record bottom left Pressure gauge (3) reading, right Pressure gauge (6) reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop；6), record do not use left Pressure gauge (3) reading when taking rock instrument, right Pressure gauge (6) reading, add the weight of landwaste in landwaste amount, filter, track and cutting bed granule settling height again after starting, analyze the different coal powder quantity of bore impact on taking rock effect and pressure drop.
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