CN103531076B - A set of drilling condition simulation system and workflow thereof - Google Patents
A set of drilling condition simulation system and workflow thereof Download PDFInfo
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- CN103531076B CN103531076B CN201310545819.1A CN201310545819A CN103531076B CN 103531076 B CN103531076 B CN 103531076B CN 201310545819 A CN201310545819 A CN 201310545819A CN 103531076 B CN103531076 B CN 103531076B
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Abstract
The present invention relates to a set of drilling condition simulation system and workflow thereof, belong to engineering test technical field, be mainly used in the underground working environmental simulation under well depth condition different in Process of Oil Well Drilling and the analog demenstration experimental study to leakage well kick process.The underground working environment that this drilling condition simulation system mainly can be simulated comprises: the normal rotary drilling process of drill bit, drilling mud circulation process, leakage process, well kick process and be provided with the DRILL-STRING SYSTEM experimental test procedures of subsurface tool, by realizing the control of mud temperature, flow and drilling rod rotational speed carrying out associated analog test to different well depth, different mud circulation situation and the rig multiple underground working environment under different drill speed in simulation process.This simulation system has simple operation and the simple feature of structure, effectively can carry out modeling effort to multiple underground working environment.
Description
Technical field
The present invention relates to petroleum drilling exploratory development field, a set of experimental technique for carrying out associated analog research under different drilling condition environment, the normal rotation being specifically applicable to different well depth condition lower drill turns simulation test into process, drilling mud circulation process and leakage well kick process and working-flow thereof.
Background technology
Since entering 21 century, from the status quo and development trend of oil and gas well drilling development technique, adopt rotary drilling will be topmost boring method in In Oil Field Exploration And Development process from now on.Rotary drilling technology can be subdivided into the main drilling mode of turntable rotation drilling well, hole-bottom power drilling and composite rotating drilling well that both take into account etc. three kinds.Turntable rotation drilling technique makes whole DRILL-STRING SYSTEM be in rotary motion state, drives bit to creep into simultaneously; Hole-bottom power drilling is that the rotor of mud motor drives bit to creep into, and rotating disk and whole drill string are in non rotating state; Composite rotating drilling well is then using mud motor while, start again turntable rotation creep into.Rotary drilling technology develops from cable tool drilling, with the obvious advantage compared with percussion drill technology, so be most widely used in Modern oil field performance history.Rotary drilling equipment is primarily of rig, derrick and a set of elevator system composition, realize mentioning of down-hole equipment by elevator system and transfer, and complete rotary motion motion by rotating disk, drilling tool rotates the drill bit rotational driving drill string bottom, make drill bit fractured rock under the effect of drill string suspending weight, broken landwaste is pumped into the mud circulation in well by steam piano again and is brought to ground, just drilling tool is tripped out after bit wear and change green bit, brill is descended to creep into again, well is made constantly to be deepened until be drilled into expectation well depth by so circulating, it is more than the whole workflow of turntable rotation drilling technique.
In drilling process, drilling mud circulation process is processed being brought to ground by the landwaste of drill bit fragmentation by mud, generally can be furnished with 3 steam piano in the mud pump room of situ of drilling well, from slurry cabin, the mud of purification is first drawn through with charge pump, discharge after steam piano pressurization, again by the distribution of pump room valve sets, rig floor standpipe valve sets is arrived through high pressure line (duplex), by being arranged on the two thribbles on derrick, rotary hose, top-drive device (or water swivel), drilling rod inner chamber arrives the drill bit of down-hole, high-pressure slurry carries out spraying to rush and carry the annular space of solid phase particles between drilling rod and sleeve pipe returning well head to shaft bottom, mud with solid phase particles returns out by under the hydraucone of well head rotating disk bottom, and arrive horizontal slush-pit launder by the mud line being arranged on drillingrig base bottom, arrive vibratory screening apparatus through longitudinal slush-pit launder again and carry out the laggard tank of coagulation, through desanding, desilt, degasification, after centrifugal treating, slurry cabin is entered by solid controlling module discharge opeing manifold, water-line again through steam piano enters in pump, circulation like this completes whole drilling operation mud circulation process.
And in drilling engineering, leakage, well kick operating mode are two kinds of common form of down hole problem.In this process, in pit shaft, the bleed phenomenon in the space such as formation pore, crack of drilling fluid or other media (cementing slurry etc.) is referred to as leakage, it is complex situations in well common in drilling engineering, most drilling process has leakage in various degree, serious leakage can cause borehole pressure to decline, and affects normal drilling well, causes borehole well instability, brings out resident fluid and pour in pit shaft and the generation causing the accidents such as blowout; Well kick is that in-hole fluid stressor layer is when being greater than drilling fluid or well-flushing fluid column static pressure, to invade in people's pit shaft containing the fluid in fluid layer or gas, build up to a certain amount of after form boiling-like with liquid-circulating in pit shaft to well head, well kick is also often the tendency of blowout, is a kind of main oil, gas, water display.The generation of well kick, leakage can bring tremendous influence to normal drilling process, is thus of great significance the modeling effort tool of well kick, leakage operating mode.
Summary of the invention
In order to carry out modeling effort to the operating mode at well depth place different in Process of Oil Well Drilling, and demonstration simulation is carried out to the more dangerous situation such as leakage, well kick that occurs, the invention provides a set of for the simulation system of drilling condition research experiment and workflow thereof, this simulation system effectively can be simulated the normal rotary drilling process of drill bit, drilling mud circulation process, leakage process, well kick process and the DRILL-STRING SYSTEM experimental test procedures being provided with subsurface tool, also there is system architecture simultaneously simple, the features such as simple operation.
For achieving the above object, the technical solution used in the present invention is as follows:
The process that drilling condition simulation system of the present invention can be simulated comprises the normal rotary drilling process of drill bit, drilling mud circulation process, leakage process, well kick process and is provided with the DRILL-STRING SYSTEM experimental test procedures of subsurface tool.Described motor support frame, motor, speed reduction unit, pinion wheel, gear wheel, bearing erecting bed, bolt, felt gasket, bearing (ball) cover, O-ring seal, rolling bearing and drilling rod are comprised to equipment involved in the simulation process of the normal rotary drilling of drill bit and parts.Power is selected to meet the motor of rod rotation speed requirement in general drilling process, and select can and motor match and realize the speed reduction unit of transformation of speed, both combine the power providing drilling rod to rotate, bolt is used to be arranged on motor support frame by the bottom of motor, one end of reducer output shaft is provided with pinion wheel, and gear wheel is installed in correct position place, drilling rod top and can realizes meeting with pinion wheel and engages the matching relationship required.Motor support frame is set up and is arranged on bearing erecting bed, rolling bearing is placed in the hole that bearing erecting bed pre-sets, the felt gasket being used for the rotary seal of bearing (ball) cover and drilling rod is first placed in bearing (ball) cover, and place O-ring seal at end cap and bearing erecting bed contact position, with bolt, bearing (ball) cover is fixed on bearing erecting bed again, then device is placed on to keep stable in mounting seat, simultaneously the bottom of mounting seat offer allow external pipeline pass through after enter the aperture of the borehole wall.
Owing to have employed said structure, this Simulated System can in the condition of adjustable motor rotating speed to the simulation process of the normal rotary drilling of drill bit, realize the modeling effort to the DRILL-STRING SYSTEM rotary drilling operating mode under different drill speed condition, with the usable range of this extension system and function.
Equipment involved by drilling mud circulation simulation process of the present invention comprises mud tank, steam piano A, flat valve A, tubular heater, diverting valve, bimetallic system cell A, temperature compensation flow speed control valve, flowmeter A, rotary seal end, flowmeter B, refrigeratory, bimetallic system cell B, flat valve B and deceleration valve.When drilling rod normally rotates, open flat valve A and flat valve B, close flat valve C and flat valve D, after mud is extracted out by startup steam piano A from mud tank, after flat valve A, be input to tubular heater carry out intensification heating, heating-up temperature is determined by the depth of stratum that will simulate according to ground temperature gradient scope, after heating, mud flows to the mud line at place, side, drilling rod top through diverting valve, the mud flowed out from diverting valve will through temperature compensation flow speed control valve, flow in drilling rod from the rotary seal end on drilling rod top, and use bimetallic system cell A and flowmeter A to record the temperature and flow value entering mud, after completing drill string mud circulation process, mud flows to fluid mud line from the exit on borehole wall top, cool through subcooler and speed reduction unit reduces after flow velocity and is back in mud tank, flowmeter B and bimetallic system cell B is used for measuring the mud flow rate and temperature value that flow out pit shaft, mud tank enters mud mouth place and is provided with liquid barrier, prevent the mud entered to the impingment corrosion of tank body, mud tank top is provided with flange simultaneously, and outside mud enters in tank body by this interface, liquid outlet is provided with, for carrying out emptying manipulation to mud in tank bottom mud tank.
Owing to have employed said structure, this simulation system can react the mud circulation process under different drilling condition condition more really, the cooperation of tubular heater and refrigeratory is utilized to carry out heating and cooling to circulating mud according to underground temperature gradient, the operating mode of system to different well depth section is enable to carry out effective modeling effort, mud is back in mud tank after cooling again simultaneously, can effectively make the mud temperature of the whole circulation system remain in an adjustable scope.
Equipment involved by leakage simulation process of the present invention comprises retaining valve, slurry pump B, flowmeter C, flat valve F and flat valve D.Retaining valve is used for the unidirectional flow direction controlling leakage mud, prevent that the mud of fluid pipeline in mud normal circulation process is reverse enters leakage pipeline, slurry pump B is in order to provide the power of the mud loss under leakage operating mode, and the mud of leakage is cooled by entering refrigeratory after retaining valve, imported in mud tank, flowmeter C is mainly used in the size measuring mud loss amount again.
Owing to have employed said structure, this simulation system not only can complete to leakage operating mode modeling effort, mud loss amount can be recorded simultaneously, and import after the cooling of the mud of leakage in mud circulation process, ensure the stable supply of mud circulation amount in whole cyclic process.
Equipment involved by well kick simulation process of the present invention comprises diverting valve, flat valve C, flat valve D, flat valve E, flowmeter D and steam piano C.Flat valve D and flat valve C is opened in simulation process, close flat valve F, mud enters flat valve C via after diverting valve shunting, then enters drill string circulation system after providing power to flow through flat valve E and flowmeter D by steam piano C, and flowmeter D can measure the mud flow rate entering DRILL-STRING SYSTEM circulation.
Owing to have employed said structure, this simulation system can be measured and obtain the mud amount of pouring on the basis to well kick Work condition analogue, for Work condition analogue analytic process provides data supporting, mud enters well kick pipeline after heating up via tube heater simultaneously, can mud be used to carry out modeling effort under different well depth operating mode.
Major equipment involved by DRILL-STRING SYSTEM experimental test procedures to being provided with subsurface tool of the present invention comprises drilling rod, subsurface tool and the borehole wall.Involved subsurface tool is arranged in DRILL-STRING SYSTEM, mud circulates between DRILL-STRING SYSTEM and the borehole wall, to in the normal rotary drilling simulation of drill bit and the basis of drilling mud circulation process, and the leakage process and well kick process that occur in drilling process can be simulated, instrument is tested under different operating mode and limit subsurface environment condition, obtains more comprehensive and close to the test figure under real working condition condition.
Drilling condition simulation system of the present invention can be simulated drilling process under multiple different working condition, comprise: the normal rotary drilling process of drill bit, drilling mud circulation process, leakage process, well kick process and the DRILL-STRING SYSTEM experimental test procedures of subsurface tool is installed, and according to underground temperature gradient, the mud temperature under different well depth condition is regulated and controled, make system can realize the dividual simulation research of different well depth, simultaneously serviceability temperature meter and flowmeter obtain temperature in mud circulation process and flow, use flat valve to control the flow direction of mud.The experimentation of this simulation system is simple, each simulation process workable and have practical value.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further illustrated.
Fig. 1 is that drilling condition analog system device connects and mud circulation schematic diagram.
Fig. 2 is the workflow schematic diagram of drilling condition simulation system.
Mark in figure: 1-mud tank flange, 2-liquid barrier, 3-mud tank, 4-liquid level gauge, 5-steam piano A, 6-flat valve A, 7-tubular heater, 8-diverting valve, 9-bimetallic system cell A, 10-temperature compensation flow speed control valve, 11-flowmeter A, 12-motor support frame, 13-motor, 14-speed reduction unit, 15-pinion wheel, 16-rotary seal end, 17-gear wheel, 18-bearing erecting bed, 19-bolt, 20-felt gasket, 21-bearing (ball) cover, 22-O-ring seal, 23-rolling bearing, 24-flowmeter B, 25-refrigeratory, 26-bimetallic system cell B, 27-flat valve B, 28-deceleration valve, 29-flat valve C, 30-drilling rod, 31-subsurface tool, the 32-borehole wall, 33-mounting seat, 34-retaining valve, 35-slurry pump B, 36-flowmeter C, 37-flat valve F, 38-flat valve D, 39-flat valve E, 40-flowmeter D, 41-steam piano C, 42-liquid outlet.
Embodiment
Drilling condition simulation system of the present invention, it is such as shown in Fig. 1, it comprises normal rotary drilling process to drill bit, drilling mud circulation process, leakage process, well kick process and is provided with the simulation experiment study of DRILL-STRING SYSTEM experimental test procedures of subsurface tool, and Fig. 2 is the workflow schematic diagram of this simulation system.
In subsystem to the normal rotary drilling process simulation of drill bit, form primarily of motor support frame (12), motor (13), speed reduction unit (14), pinion wheel (15), gear wheel (17), bearing erecting bed (18), bolt (19), felt gasket (20), bearing (ball) cover (21), O-ring seal (22), rolling bearing (23) and drilling rod (30).The motor (13) selecting power to meet the demands and matching the speed reduction unit (14) realizing transformation of speed with motor (13), after installing, both are combined provides the drilling rod power that (30) rotate, bolt is used to be arranged on motor support frame (12) motor (13) bottom again, pinion wheel (15) is arranged on one end of speed reduction unit (14) output shaft, and gear wheel (17) is arranged on correct position place, drilling rod (30) top and can realizes satisfied engaging the relation that is rotatably assorted required according to a stable drive ratio with pinion wheel (15); Motor support frame (12) is arranged on bearing erecting bed (18), rolling bearing (23) is placed on bearing erecting bed (18) and installs in the hole that pre-sets of bearing specification, and the felt gasket (20) being used for bearing (ball) cover (21) and drilling rod (30) rotary seal is first placed in bearing (ball) cover (21), and place O-ring seal (22) at end cap and bearing erecting bed (18) contact position, use bolt (19) to be fixed on bearing erecting bed (18) by bearing (ball) cover (21) again, finally device is placed in mounting seat (33).Starter motor (13) after installation, regulates the output speed of speed reduction unit (14) according to the requirement of different underground working, realized the drilling process simulation of drilling rod (30) by the cooperation of two gears.
Equipment involved by drilling mud circulation simulation process comprises mud tank (3), steam piano A(5), flat valve A(6), tubular heater (7), diverting valve (8), bimetallic system cell A(9), temperature compensation flow speed control valve (10), flowmeter A(11), rotary seal end (16), flowmeter B(24), refrigeratory (25), bimetallic system cell B(26), flat valve B(27) and deceleration valve (28).When drilling rod (30) normally rotates, open flat valve A(6) and flat valve B(27), close flat valve C(29) and flat valve D(38), start steam piano A(5) mud is extracted out from mud tank (3), through flat valve A(6) after be input to tubular heater (7) carry out intensification heating, the temperature that heating-up temperature specifies according to underground temperature gradient-depth of stratum numerical range is determined by the depth of stratum that will simulate, after completing, mud flows to the mud line at place, side, drilling rod top through diverting valve (8), from diverting valve flow out mud after temperature compensation flow speed control valve (10), flow in drilling rod (30) from the rotary seal end (16) on drilling rod top, in this course by bimetallic system cell A(9) and flowmeter A(11) record temperature when mud enters and flow value, after completing the cyclic process of drilling rod (30) and the borehole wall (32), mud flows to fluid mud line from the exit on the borehole wall (32) top, to cool through subcooler (25) and speed reduction unit (28) reduces after flow velocity and is back in mud tank (3), the flowmeter B(24 installed in fluid pipeline) and bimetallic system cell B(26) be used for measuring mud flow rate and the temperature value of outflow pit shaft, mud tank (3) enters the liquid barrier (2) that mud mouth place arranges can play the mud that prevents from entering to the impingment corrosion effect of tank body, the flange (1) that outside mud is arranged by mud tank top simultaneously enters in tank body, and the liquid outlet (42) that in tank, mud is arranged by bottom flows out mud tank (3).
Equipment involved in leakage simulation process comprises retaining valve (34), slurry pump B (35), flowmeter C(36), flat valve F(37) and flat valve D(38).In the normal rotary drilling of drill bit and the basis of drilling mud circulation process, open flat valve D(38) and flat valve F(37), close flat valve E(39) start slurry pump B (35) afterwards, the power of the mud loss under leakage operating mode is provided by slurry pump B (35), and the mud of leakage is cooled by entering refrigeratory after retaining valve (34), imported in mud tank (3) again, in this simulation process, retaining valve (34) is for the unidirectional flow direction controlling leakage mud, prevent that the mud of fluid pipeline is reverse enters leakage pipeline, flowmeter C(36) be mainly used in the size measuring mud loss amount.
Equipment involved in well kick simulation process comprises diverting valve (8), flat valve C(29), flat valve D(38), flat valve E(39), flowmeter D(40) and steam piano C(41).In simulation system on the normal rotary drilling of drill bit and the basis of drilling mud circulation process, open flat valve D(38) and flat valve C(29), close flat valve F(37), start steam piano C(41), mud enters flat valve C(29 via after diverting valve (8) shunting), again by steam piano C(41) provide power to flow through flat valve E(39) and flowmeter D(40) after enter drill string circulation system, flowmeter D(40) for measure flow into DRILL-STRING SYSTEM circulation mud pour in uninterrupted.
Drilling rod (30), subsurface tool (31) and the borehole wall (32) are comprised to the major equipment involved by the DRILL-STRING SYSTEM experimental test procedures being provided with subsurface tool.Subsurface tool (31) is arranged in DRILL-STRING SYSTEM, and mud can be circulated between DRILL-STRING SYSTEM and the borehole wall (32), in the normal rotary drilling simulation of drill bit and the basis of drilling mud circulation process, by aforesaid operations step and workflow, instrument is tested in leakage process and well kick process, also ensures the carrying out tested under different operating mode and limit subsurface environment condition simultaneously, obtain more comprehensive and close to the test figure under real working condition condition
The workflow of a set of drilling condition simulation system described in the present invention, is characterized in that the implementation step of described workflow is as follows:
A. to the normal rotary drilling process simulation of drill bit, motor (13) and speed reduction unit (14) are installed on motor support frame (12), drilling rod (30) is placed in bearing erecting bed (18) together with rolling bearing (23) mounted thereto, bearing (ball) cover (21) and drilling rod (30) touching position are provided with felt gasket (20), for controlling the sealing of mud in drilling rod rotary course, between bearing erecting bed (18) and bearing (ball) cover (21), being provided with O-ring seal (22) simultaneously and controlling for static seal; When normal drilling process starts, first starter motor (13), pinion wheel (15) is driven to rotate by speed reduction unit (14), make the rotating speed of pinion wheel (15) adjustable and keep within limits, gear wheel (17) under the engagement of pinion wheel (15), take drilling rod (30) to and subsurface tool (31) rotates, to realize the simulation to normal rotary drilling process;
B. to drilling mud circulation process simulation, close flat valve C(29) and flat valve D(38), open flat valve A(6), start steam piano (5) drilling mud in mud tank (3) is extracted out, the mud extracted out is allowed to carry out heat temperature raising in tubular heater (7), estimate according to the about 3 DEG C/100m of the underground temperature gradient in drilling process, the temperature that mud heats is determined by the well depth data will carrying out simulating, mud is allowed to flow to temperature compensation flow speed control valve (10) by diverting valve (8), drill string mud circulating system is entered by rotary seal end (16) after making mud speed rate adjustment meet the requirements of numerical value, use bimetallic system cell A(9 in this course) and flowmeter A(11) measure mud temperature value and the flow value of flowed into system, flow to the mud of DRILL-STRING SYSTEM by flowing to fluid pipeline along the borehole wall (32) after drilling rod (30) and subsurface tool (31), open flat valve B(27), mud is made to be cooled to normal temperature in refrigeratory (25), reduced after flow velocity by deceleration valve (28) again and be back in mud tank (3), the flowmeter B(24 installed in fluid pipeline) and bimetallic system cell B(26) measurable flow goes out mud stream value and the temperature value of system,
C. to leakage process simulation, in the process of normal rotary drilling, close flat valve E(39), open flat valve D(38) and flat valve F(37), start slurry pump B (35) for mud loss flowing raising power, by to flat valve F(37) adjustment of aperture misses the size of mud amount under controlling leakage operating mode, and use traffic meter C(36) obtain concrete leakage mud stream value, retaining valve (34) turns into the mud adverse current in process in leakage pipeline for preventing normal circulation, mud by missing pipeline is imported to simultaneously and flow back in mud tank (3) again after cooling in refrigeratory (25),
D. to well kick process simulation, in the process of normal rotary drilling, close flat valve F(37), open flat valve D(38), flat valve E(39) and flat valve C(29), start steam piano C(41) provide power for mud enters DRILL-STRING SYSTEM, simultaneously by regulating flat valve C(29) valve opening control the size of the mud amount of pouring in, use traffic meter D(40) obtain and concrete pour in mud stream value;
E. the DRILL-STRING SYSTEM experimental test procedures being provided with subsurface tool is simulated, subsurface tool (31) is loaded in drilling rod (30), starter motor (13), allow DRILL-STRING SYSTEM rotary motion, the simulation experiment study to normal rotary drilling process and drilling mud circulation process can be realized according to the operation steps of above-mentioned flow process a and flow process b; Coordinate flow process c and flow process d can complete the leakage of subsurface tool under different well depth operating mode and the research of well kick process simulation, can be subsurface tool being close to the verification experimental verification under true underground working condition research according to above-mentioned flow process and provide support;
F. after having tested, close steam piano and motor, the drilling fluid remained in system is cleaned out DRILL-STRING SYSTEM and liquid flowing line from liquid outlet (42), takes out subsurface tool and relevant experimental data is processed, obtaining the experimental study conclusion under different underground working condition.
Claims (2)
1. a set of drilling condition simulation system, it is characterized in that: described drilling condition simulation system can be simulated the normal rotary drilling process of drill bit, drilling mud circulation process, leakage process, well kick process and be provided with the DRILL-STRING SYSTEM experimental test procedures of subsurface tool, and by carrying out associated analog test to the control of mud temperature, flow and drilling rod rotational speed to multiple underground working condition;
In described drill bit normal rotary drilling process simulation subsystem, form primarily of motor support frame (12), motor (13), speed reduction unit (14), pinion wheel (15), gear wheel (17), bearing erecting bed (18), bolt (19), felt gasket (20), bearing (ball) cover (21), O-ring seal (22), rolling bearing (23) and drilling rod (30); Motor (13) and speed reduction unit (14) combination provide the drilling rod power that (30) rotate and are arranged on motor support frame (12), speed reduction unit (14) one end is provided with pinion wheel (15), and the gear wheel (17) matched with pinion wheel (15) is arranged on drilling rod (30) correct position place; Rolling bearing (23) and bearing (ball) cover (21) are fixedly mounted on bearing erecting bed (18) by bolt (19), felt gasket (20) is for the rotary seal of bearing (ball) cover (21) and drilling rod (30), and O-ring seal (22) is for the static seal of bearing (ball) cover (21) and bearing erecting bed (18);
In described drilling mud circulation process simulation subsystem, form primarily of mud tank (3), steam piano A (5), flat valve A (6), tubular heater (7), diverting valve (8), bimetallic system cell A (9), temperature compensation flow speed control valve (10), flowmeter A (11), rotary seal end (16), flowmeter B (24), refrigeratory (25), bimetallic system cell B (26), flat valve B (27) and deceleration valve (28); Steam piano A (5) is transported to tubular heater (7) after being extracted out from mud tank (3) by mud and carries out heat temperature raising, heating-up temperature is determined by the hole condition depth of stratum value will carrying out simulating, mud is divided into two-way by diverting valve (8): a road enters normal mud circulation pipeline, and another road enters well kick process simulation pipeline; Bimetallic system cell A (9) and flowmeter A (11) is measured the mud temperature and flow number that are entered DRILL-STRING SYSTEM by rotary seal end (16) respectively, and temperature compensation flow speed control valve (10) mainly regulates the flow velocity size that the mud after heating enters DRILL-STRING SYSTEM; Mud flows out into after refrigeratory (25) completes cooling from drill string mud circulating system to be got back to mud tank (3), flowmeter B (24) and bimetallic system cell B (26) is for measuring the flow value and temperature value that flow out mud, and deceleration valve (28) is mainly used in reducing the speed flowing out mud;
In described leakage process simulation subsystem, form primarily of retaining valve (34), slurry pump B (35), flowmeter C (36), flat valve F (37) and flat valve D (38); Retaining valve (34) is for the flow direction of unidirectional control mud, there is provided the mud loss power under leakage operating mode by slurry pump B (35) and the mud of leakage is cooled by entering refrigeratory (25) after retaining valve (34), after temperature-fall period completes in inflow mud tank (3), flowmeter C (36) is mainly used in the size measuring mud loss amount;
In described well kick process simulation subsystem, form primarily of diverting valve (8), flat valve C (29), flat valve D (38), flat valve E (39), flowmeter D (40) and steam piano C (41); Mud enters flat valve C (29) via after diverting valve (8) shunting, carry out in the mud circulation process of DRILL-STRING SYSTEM after providing power to flow through flat valve E (39) and flowmeter D (40) by steam piano C (41) again, flowmeter D (40) is for measuring the size of leakage mud amount;
Described is provided with in the drill string experimental test procedures subsystem of subsurface tool, forms primarily of rotary seal end (16), drilling rod (30), subsurface tool (31) and the borehole wall (32); Subsurface tool (31) is arranged in drilling rod (30), the rotary seal end (16) of mud through drilling rod top enters in DRILL-STRING SYSTEM, and circulate between DRILL-STRING SYSTEM and the borehole wall (32), subsurface tool (31) carries out correlation test research under the mud effect be subject under Different Strata depth conditions and the underground working condition when there is leakage or well kick situation.
2. the workflow of a set of drilling condition simulation system according to claim 1, is characterized in that the implementation step of described workflow is as follows:
A. to the normal rotary drilling process simulation of drill bit, motor (13) and speed reduction unit (14) are installed on motor support frame (12), drilling rod (30) is placed in bearing erecting bed (18) together with rolling bearing (23) mounted thereto, bearing (ball) cover (21) and drilling rod (30) touching position are provided with felt gasket (20), for controlling the sealing of mud in drilling rod rotary course, between bearing erecting bed (18) and bearing (ball) cover (21), being provided with O-ring seal (22) simultaneously and controlling for static seal; When normal drilling process starts, first starter motor (13), pinion wheel (15) is driven to rotate by speed reduction unit (14), make the rotating speed of pinion wheel (15) adjustable and keep within limits, gear wheel (17) under the engagement of pinion wheel (15), take drilling rod (30) to and subsurface tool (31) rotates, to realize the simulation to normal rotary drilling process;
B. to drilling mud circulation process simulation, close flat valve C (29) and flat valve D (38), open flat valve A (6), start steam piano (5) drilling mud in mud tank (3) is extracted out, the mud extracted out is allowed to carry out heat temperature raising in tubular heater (7), estimate according to the about 3 DEG C/100m of the underground temperature gradient in drilling process, the temperature that mud heats is determined by the well depth data will carrying out simulating, mud is allowed to flow to temperature compensation flow speed control valve (10) by diverting valve (8), drill string mud circulating system is entered by rotary seal end (16) after making mud speed rate adjustment meet the requirements of numerical value, bimetallic system cell A (9) and flowmeter A (11) is used to measure mud temperature value and the flow value of flowed into system in this course, flow to the mud of DRILL-STRING SYSTEM by flowing to fluid pipeline along the borehole wall (32) after drilling rod (30) and subsurface tool (31), open flat valve B (27), mud is made to be cooled to normal temperature in refrigeratory (25), be back in mud tank (3) after reducing flow velocity by deceleration valve (28) again, the flowmeter B (24) installed in fluid pipeline and bimetallic system cell B (26) measurable flow go out mud stream value and the temperature value of system,
C. to leakage process simulation, in the process of normal rotary drilling, close flat valve E (39), open flat valve D (38) and flat valve F (37), start slurry pump B (35) for mud loss flowing raising power, by missing the size of mud amount under controlling leakage operating mode to the adjustment of flat valve F (37) aperture, and use traffic meter C (36) obtains concrete leakage mud stream value, retaining valve (34) turns into the mud adverse current in process in leakage pipeline for preventing normal circulation, mud by missing pipeline is imported to simultaneously and flow back in mud tank (3) again after cooling in refrigeratory (25),
D. to well kick process simulation, in the process of normal rotary drilling, close flat valve F (37), open flat valve D (38), flat valve E (39) and flat valve C (29), start steam piano C (41) and provide power for mud enters DRILL-STRING SYSTEM, simultaneously by regulating the valve opening of flat valve C (29) to control the size of the mud amount of pouring in, use traffic meter D (40) obtains and concrete pours in mud stream value;
E. the DRILL-STRING SYSTEM experimental test procedures being provided with subsurface tool is simulated, subsurface tool (31) is loaded in drilling rod (30), starter motor (13), allow DRILL-STRING SYSTEM rotary motion, the simulation experiment study to normal rotary drilling process and drilling mud circulation process can be realized according to the operation steps of above-mentioned flow process a and flow process b; Coordinate flow process c and flow process d can complete the leakage of subsurface tool under different well depth operating mode and the research of well kick process simulation, can be subsurface tool being close to the verification experimental verification under true underground working condition research according to above-mentioned flow process and provide support;
F. after having tested, close steam piano and motor, the drilling fluid remained in system is cleaned out DRILL-STRING SYSTEM and liquid flowing line from liquid outlet (42), takes out subsurface tool and relevant experimental data is processed, obtaining the experimental study conclusion under different underground working condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545819.1A CN103531076B (en) | 2013-11-06 | 2013-11-06 | A set of drilling condition simulation system and workflow thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545819.1A CN103531076B (en) | 2013-11-06 | 2013-11-06 | A set of drilling condition simulation system and workflow thereof |
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| Publication Number | Publication Date |
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| CN103531076A CN103531076A (en) | 2014-01-22 |
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