CN103485738A - Horizontal well rock debris transportation simulation experiment set and experiment method - Google Patents
Horizontal well rock debris transportation simulation experiment set and experiment method Download PDFInfo
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Abstract
The invention relates to a horizontal well rock debris transportation simulation experiment set and experiment method which are used for simulating oil drilling and coal bed gas drilling. The horizontal well rock debris transportation simulation experiment set comprises a drill fluid system, a rock debris transportation system, a rock debris supply system, a power system, a data processing system and a rock debris recovering system. The drilling liquid system is composed of a liquid storage tank, a motor, a centrifugal pump, a flowmeter and a butterfly valve which are connected. The rock debris transportation system is composed of a converting connector, a glass tube, a PVC tube, a rock carrying tool, an eccentric triangular plate and the like. The rock debris supply system is composed of a spiral feeder and a rock debris filling device. The power system is composed of a speed regulating motor and a speed changing gear. The rock debris recovering system is composed of a recovering tube, a filter and a rock debris recovering pool. The horizontal well rock debris transportation simulation experiment set and the experiment method can be used for visually observing the transportation condition of horizontal well rock debris, and the influence of different discharge capacities, drill stem rotating speeds, the eccentricity between a drill stem and a borehole, rock debris amounts and rock debris grain sizes on a horizontal well rock debris transportation rule can be simulated. The horizontal well rock debris transportation simulation experiment set is simple and practical, and low in construction cost.
Description
Technical field
The present invention relates to experimental facilities and experimental technique for simulating oil drilling, CBM Drilling, this experimental facilities can carry out a kind of horizontal well landwaste migration analogue experiment installation and the experimental technique of visual observation.
Background technology
In oil, coal bed gas drilling process, for bare area, raising recovery ratio, the single well productivity that improves, the raising Area of a well that effectively increases oil-gas Layer, realize " few well high yield ", often usage level well drilling technology.Horizontal well is that hole angle reaches or approaches 90 °, and well bore creeps into the well of certain-length along horizontal direction, and sometimes for certain special needs, hole angle surpasses 90 °, and this has brought technical barrier for the migration of horizontal well landwaste.Horizontal well is widely used in oil, CBM Drilling because of its advantage, because of horizontal well, takes the development that the problem such as rock is restricting horizontal well drilling technology simultaneously.
Because the reason of drill string gravity makes the drill string borehole wall under horizontal segment that lies low, form eccentric annulus, very easily cause the landwaste deposition at the first-class changeover portion of drilling rod connecting, talus deposit is crossed and is formed at most cutting bed.Annular Cuttings is piled up and to be easy to cause the high moment of torsion of drill string and high-drag, adheres to bit freezing, causes setting of casing and well cementation difficulty, and the drilling tool wearing and tearing are large, the logger problem such as difficult of going into the well.As not smooth owing to taking sand as the Sichuan province horizontal well, downhole debris is piled into bed, causes drilling tool stuck, causes sidetracking after well filling.For preventing the generation of above-mentioned accident, understand fully horizontal well landwaste migration mechanism and how to prevent that talus deposit from becoming bed to become the technical barrier of needing solution badly.
Therefore, be badly in need of a kind of can the simulation, and the experimental facilities of energy visual observation horizontal well landwaste migration rule.This device comprises drilling fluid system, landwaste migration system, landwaste feed system, dynamical system, data handling system and landwaste recovery system.But use the drilling fluid under this experimental facilities rod rotation speeds different from the method qualitative research, coal powder quantity of bore, flow, drilling rod eccentricity and landwaste diameter condition to take the rock problem; Use this experimental facilities and method can carry out visual eye-level well landwaste migration rule, will take the rock problem for the solution horizontal well reliable foundation is provided.
Summary of the invention
The objective of the invention is: for overcoming the deficiencies in the prior art, the spy provides a kind of horizontal well landwaste migration analogue experiment installation and experimental technique that carries out visual observation and simulation various working.
For achieving the above object, the technical scheme that head it off of the present invention adopts is: a kind of horizontal well landwaste migration analogue experiment installation and experimental technique comprise drilling fluid system, landwaste migration system, landwaste feed system, dynamical system, data handling system and landwaste recovery system.It is characterized in that: described drilling fluid system is by liquid storage tank, outlet shutoff valve, motor, centrifugal pump, pressure meter, flow meter, butterfly valve and steel wire tube connect to form successively, described landwaste migration system is by crossover sub, sealed bearing, glass tube, the through hole flange, bearing, pvc pipe, the pvc pipe joint, take the rock instrument, eccentric triangular plate, blind plate and bracing frame form, described landwaste feed system is by feeding screw and add the landwaste installation composition, described dynamical system is by buncher, change-speed gearing and fixed mount form, described data handling system is by high-speed camera, tripod and computer form, described landwaste recovery system is by recovery tube, strainer, landwaste recovery pond and stop valve connect to form successively, recovery tube is connected with the glass tube port of export.
Described crossover sub osculum end is connected with steel wire tube, and sealed bearing is equipped with in crossover sub big opening end inside, and sealed bearing is fixed on the pvc pipe low order end by interference fit, for preventing steel wire tube, with the rotation of pvc pipe, rotates; Described glass tube adopts withstand voltage, transparent material, can directly observe the process of landwaste migration, reaches visual requirement, the glass tube two ends are with flange arrangement, between glass tube, be bolted, left pressure meter and right pressure meter are equipped with respectively in second glass tube two ends, and pvc pipe is installed in glass tube; The described landwaste device that adds is connected with feeding screw, adds the landwaste amount that adds of landwaste device by control, can reach the coal powder quantity of bore that the simulation drilling well produces; Described eccentric triangular plate is cylindric, cylinder is welded with three supports outward, and between each support, angle is 120 °, and pvc pipe is installed in eccentric triangular plate, gap between eccentric triangular plate and pvc pipe is 2～3mm, realizes the eccentricity of eccentric triangular plate by the length of controlling support.
Use the method for said apparatus Simulated Water horizontal well landwaste migration, mainly comprise the following steps:
1) provide drilling fluid by the drilling fluid system to pvc pipe, with the drilling fluid in the dummy level well shaft;
2) add the landwaste amount that adds of landwaste device by control, can reach the coal powder quantity of bore that the simulation drilling well produces, record after bottom left pressure gauge reading, right pressure gauge reading, the weight that adds landwaste in landwaste amount, strainer, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
3) regulate drilling fluid displacement, the recording flowmeter reading, can reach simulation drilling fluid difference and return under speed the rock situation of taking, and record after bottom left pressure gauge reading, right pressure gauge reading, the weight that adds landwaste in landwaste amount, strainer, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
4) change the eccentricity of pvc pipe by changing different eccentric triangular plates, record after bottom left pressure gauge reading, right pressure gauge reading, the weight that adds landwaste in landwaste amount, strainer, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
5) change the rotating speed of pvc pipe by regulating motor, record after bottom left pressure gauge reading, right pressure gauge reading, the weight that adds landwaste in landwaste amount, strainer, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
6) record is used after left pressure gauge reading while taking the rock instrument, right pressure gauge reading, the weight that adds landwaste in landwaste amount, strainer, track and the starting of cutting bed particle settling height again, analyzes different coal powder quantity of bore to taking the impact of rock effect and pressure drop.
Compared with prior art, its beneficial effect is in the present invention: 1) can carry out visual eye-level well landwaste transport conditions; 2) this experimental facilities can be simulated the impact on horizontal well landwaste migration rule of eccentricity, landwaste amount and landwaste particle diameter between different displacements, drill string rotating speed, drill string and well; 3) the rock instrument of taking can be installed on drill string, can simulate to install and take the rock instrument and there is no to install the transport conditions of taking rock while taking the rock instrument; 4) use high-speed camera can record the transport conditions of each landwaste, and with computer, data are processed, experimental result is accurate; 5) experimental stand is simple in structure, cost is lower, but can meet the demand of testing under various working.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is a kind of horizontal well landwaste migration of the present invention analogue experiment installation;
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.
In figure: 1. glass tube, 2. pvc pipe, 3. left pressure meter, 4. feeding screw, 5. add the landwaste device, 6. right pressure meter, 7. PVC joint 8. through hole flange, 9. bearing, 10. change-speed gearing, 11. buncher, 12. steel wire tube, 13. crossover sub 14. butterfly valves, 15. flow meter, 16. pressure meter, 17. centrifugal pump, 18. motor, 19. outlet shutoff valve, 20. liquid storage tank, 21. strainer, 22. landwaste recovery pond, 23. sealed bearing, 24. fixed mount, 25. the glass tube port of export, 26. recovery tube, 27. glass tube adds the sand mouth, 28. take the rock instrument, 29. eccentric triangular plate, 30. bracing frame, 31. blind plate, 32. stop valve, 33. high-speed camera, 34. tripod, 35. computer.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Fig. 1～4, a kind of horizontal well landwaste migration analogue experiment installation and experimental technique, comprise the drilling fluid system, landwaste migration system, the landwaste feed system, dynamical system and landwaste recovery system five parts is characterized in that: described drilling fluid system is by liquid storage tank 20, outlet shutoff valve 19, motor 18, centrifugal pump 17, pressure meter 16, flow meter 15, butterfly valve 14 and steel wire tube 12 connect to form successively, and described landwaste migration system is by crossover sub 13, sealed bearing 23, glass tube 1, through hole 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 forms, and described landwaste feed system is by feeding screw 4 and add landwaste device 5 and form, and described dynamical system is by buncher 11, change-speed gearing 10 and fixed mount 24 form, and described data handling system is by high-speed camera 33, tripod 34 and computer 35 form, and described landwaste recovery system is by recovery tube 26, strainer 21, landwaste recovery pond 22 and stop valve 32 connect to form successively, and recovery tube 26 is connected with the glass tube port of export 25.
Described crossover sub 13 osculum ends are connected with steel wire tube 12, and sealed bearing 23 is equipped with in crossover sub 13 big opening end inside, and sealed bearing 23 is fixed on pvc pipe 2 low order ends by interference fit, for preventing steel wire tube 12, with the rotation of pvc pipe 2, rotate; Described glass tube 1 adopts withstand voltage, transparent material, can directly observe the process of landwaste migration, reach visual requirement, glass tube 1 two ends are with flange arrangement, between glass tube 1, be bolted, the 3rd glass tube and second glass tube are equipped with respectively left pressure meter 3 and right pressure meter 6, the interior installation pvc pipe 2 of glass tube 1; The described landwaste device 5 that adds is connected with feeding screw 4, adds the landwaste amount that adds of landwaste device 5 by control, can reach the coal powder quantity of bore that the simulation drilling well produces; Described eccentric triangular plate 29 is cylindric, cylinder is welded with three supports outward, and between each support, angle is 120 °, the interior installation pvc pipe 2 of eccentric triangular plate 29, gap between eccentric triangular plate 29 and pvc pipe 2 is 2～3mm, realizes the eccentricity of eccentric triangular plate 29 by the length of controlling support.
Use the method for said apparatus Simulated Water horizontal well landwaste migration, mainly comprise the following steps:
1) provide drilling fluid by the drilling fluid system to pvc pipe 2, with the drilling fluid in the dummy level well shaft;
2) add the landwaste amount that adds of landwaste device 5 by control, can reach the coal powder quantity of bore that the simulation drilling well produces, record after bottom left pressure meter 3 readings, right pressure meter 6 readings, the weight that adds landwaste in landwaste amount, strainer 21, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
3) regulate drilling fluid displacement, recording flowmeter 15 readings, can reach under Simulated Water horizontal well drilling fluid different displacements and take the rock situation, and record after bottom left pressure meter 3 readings, right pressure meter 6 readings, the weight that adds landwaste in landwaste amount, strainer 21, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
4) change the eccentricity of pvc pipe 2 by changing different eccentric triangular plates 29, record after bottom left pressure meter 3 readings, right pressure meter 6 readings, the weight that adds landwaste in landwaste amount, strainer 21, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop;
5) change the rotating speed of pvc pipe 2 by regulating buncher 11, record after bottom left pressure meter 3 readings, right pressure meter 6 readings, the weight that adds landwaste in landwaste amount, strainer 21, track and the starting of cutting bed particle settling height again, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop.
While 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 tube 1, in this process, drilling fluid carries from adding the landwaste that landwaste device 5 adds and is back to landwaste recovery pond 22 through recovery tube 26, between landwaste recovery pond 22 and liquid storage tank 20, is provided with stop valve 32, opens stop valve 32, drilling liquid flow, to liquid storage tank 20, has been realized recycling of drilling fluid.By changing the situation of horizontal well landwaste migration under eccentricity, landwaste amount and the landwaste particle diameter observable various working between discharge capacity, drill string rotating speed, drill string and well.Record after left pressure meter 3 readings, right pressure meter 6 readings, the weight that adds landwaste in landwaste amount, strainer, track and the starting of cutting bed particle settling height again in experimentation, analyze different coal powder quantity of bore to taking the impact of rock effect and pressure drop.
Claims (4)
1. a horizontal well landwaste migration analogue experiment installation, comprise the drilling fluid system, landwaste migration system, the landwaste feed system, dynamical system, data handling system and landwaste recovery system six parts is characterized in that: described drilling fluid system is by liquid storage tank (20), outlet shutoff valve (19), motor (18), centrifugal pump (17), pressure meter (16), flow meter (15), butterfly valve (14) and steel wire tube (12) connect to form successively, and described landwaste migration system is by crossover sub (13), sealed bearing (23), glass tube (1), through hole 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) form, and described landwaste feed system is by feeding screw (4) and add landwaste device (5) and form, and described dynamical system is by buncher (11), change-speed gearing (10) and fixed mount (24) form, and described data handling system is by high-speed camera (33), tripod (34) and computer (35) form, and described landwaste recovery system is by recovery tube (26), strainer (21), landwaste recovery pond (22) and stop valve (32) connect to form successively, and recovery tube (26) is connected with the glass tube port of export (25).
2. a kind of horizontal well landwaste migration analogue experiment installation according to claim 1, it is characterized in that: described crossover sub (13) is the ladder barrel shape, the osculum end is connected with steel wire tube (12), sealed bearing (23) is equipped with in big opening end inside, sealed bearing (23) is fixed on pvc pipe (2) low order end by interference fit, for preventing steel wire tube (12), with the rotation of pvc pipe (2), rotates.
3. a kind of horizontal well landwaste migration analogue experiment installation according to claim 1, it is characterized in that: described eccentric triangular plate (29) is for cylindric, cylinder is welded with three supports outward, between each support, angle is 120 °, pvc pipe (2) is installed in eccentric triangular plate (29), gap between eccentric triangular plate (29) and pvc pipe (2) is 2～3mm, by the length of controlling support, realizes the eccentricity of eccentric triangular plate (29).
4. a kind of horizontal well landwaste migration analogue experiment installation according to claim 1, it is characterized in that: the situation that the experimental technique of described experimental facilities comes eye-level well landwaste to migrate for eccentricity, landwaste amount and landwaste particle diameter by changing between discharge capacity, drill string rotating speed, drill string and well, record after left pressure meter 3 readings, right pressure meter 6 readings, the weight that adds landwaste in landwaste amount, strainer 21, track and the starting of cutting bed particle settling height again in experimentation, the usage data treatment system is analyzed under above-mentioned operating mode the rock situation of taking.
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