CN209129602U - Horizontal well horizontal segment dynamic circulation imitative experimental appliance - Google Patents

Abstract

The utility model discloses a kind of horizontal well horizontal segment dynamic circulation imitative experimental appliances, including mounting rack, simulation wellbore hole and simulation drill string are provided on the mounting rack, it further include drilling-fluid circulation system, driving device, sanding device and feeder, driving device is for driving simulation drill string to move and/or drive simulation drill string rotation along simulation wellbore hole length direction, sanding device is used in experiment to drilling fluid punching plus sand, and feeder is used to inflate in experiment into simulation wellbore hole or simulation drill string.Can sufficiently in dummy level well water flat section annular circulation dynamic, simulate various state of cyclic operation, sufficiently observe landwaste movement speed in horizontal segment, landwaste distribution situation, and quantization and post analysis are carried out by measuring device, most important theories parameter is provided for actual well drilled, reduces drilling risk.

Description

Horizontal well horizontal segment dynamic circulation imitative experimental appliance

Technical field

The utility model belongs to drilling simulation technical field, and in particular to a kind of horizontal well horizontal segment dynamic circulation simulation is real Experiment device.

Background technique

It is all to influence to bore that the parameters relationship of annular space drilling fluid and landwaste in drilling process, shaft bottom sand washing and landwaste, which are returned and had troubles, An important factor for into speed, the performance of drilling fluid is direct key factor again, especially in air-filling well-drilling, the property of drilling fluid Energy parameter such as density, viscosity etc. is the landwaste dynamic for being codetermined by liquid and aeration quantity, therefore being more difficult control shaft bottom and annular space, The degree of purification for not knowing wellbore, for horizontal drilling, landwaste easily occurs accumulation in levelness and forms landwaste Bed, during actual well drilled, there are biggish control unknown risks, or cause the drilling failure of backing pressure bit freezing, the prior art In, there are also the equipment of independent simulation Cutting movement, but belong to static simulation substantially, and research object is single, it is difficult to mould Holes of Complicated Wells bottom situation in quasi- actual well drilled cyclic process, experiment analog result only have one-sidedness, and reliability is lower, cannot be real Border drilling well provides reliable and effective comprehensive well data support.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of horizontal well horizontal segment dynamic circulation simulated experiment dress Set, realize more sizes, multithread state, in multi-angle air-filling well-drilling cyclic process, drilling well sand washing, take rock, annular space returns the parameters such as speed Comprehensive simulation provides authentic data support for actual well drilled.

To achieve the above object, technical solutions of the utility model are as follows:

A kind of horizontal well horizontal segment dynamic circulation imitative experimental appliance, including horizontally disposed mounting rack, on the mounting rack With the simulation wellbore hole and simulation drill string set gradually along its length, it is characterised in that: further include:

Drilling-fluid circulation system, for the processing to simulation wellbore hole and simulation drill string supply drilling fluid and progress drilling fluid；

Driving device, for driving simulation drill string to move and/or drive simulation drill string rotation along simulation wellbore hole length direction；

Sanding device is connected with drilling-fluid circulation system, for adding sand into drilling fluid in experiment.

Using above scheme, come in dummy level drilling well with horizontally disposed simulation wellbore hole on horizontally disposed mounting rack Horizontal segment, then pass through the various operating conditions in the abundant dummy level section cyclic process of driving device, such as positive reaming, back reaming, rotation Reaming or static reaming etc. realize the dynamic analog of full working scope, can by sanding device then towards experimental subjects is added in drilling fluid Intuitive observation shaft bottom sand washing and sand formation cuttings situation of movement speed, to analyze landwaste of the landwaste in horizontal segment cyclic process point The concrete conditions such as cloth, migration velocity, for real standard section drilling or cyclic process provide important parameter support, have it is good can By property.

As preferred: the drilling-fluid circulation system includes inlet tube and slush pump interconnected and slurry tank, institute The outlet end for stating slush pump is connected to inlet tube, and the inlet tube is connected with drill string inlet tube, annular space inlet tube and bypass pipe；

The drill string inlet tube is connected to the top of simulation drill string, and annular space inlet tube is connected to the bottom end of simulation wellbore hole, institute The top for stating simulation wellbore hole is equipped with return pipe, which is equipped with vibrating screen, and the vibrating screen is connected with slurry tank, the side Siphunculus is connected by triple valve with return pipe.

Using above scheme, pipeline is rationally set, prevents pit shaft in simulation process from building the pressure, improves safety coefficient, together When ensure drilling well have good drilling-fluid circulation system, can quickly be recycled by vibrating screen return out gravel carry out data record.

As preferred: it further include the feeder for being inflated in experiment into simulation wellbore hole or simulation drill string, it is described Feeder includes air compressor machine, air accumulator and drier, and the drier is connected by pipeline with annular space inlet tube.More than Scheme is re-fed into annular space after compressed gas can be dried, it is advantageously ensured that the accuracy of gas flow, to improve reality Reliability of structure is tested, while realizing the dynamic simulation of air-filling well-drilling circulation, can satisfy more underground actual conditions demands.

As preferred: the drilling-fluid circulation system further includes sand pump and spare inlet tube, the input end of the sand pump with Slurry tank is connected, and outlet end is connected to inlet tube and spare inlet tube simultaneously, and the spare inlet tube is arranged in parallel with inlet tube, And be connected simultaneously with drill string inlet tube, annular space inlet tube and bypass pipe, the outlet end of the slush pump simultaneously also with spare feed liquor Pipe is connected.It using above scheme, advantageously ensures that experimental system job stability, prevents pipeline from damaging, experiment is caused to terminate.

As preferred: the driving device includes transmission case, which is equipped with axially driving motor and rotation driving Motor has in transmission case by axially driving motor-driven gear, is symmetrically arranged with rack gear in the two sides of transmission case on mounting rack, Wheel and rack engagement, the rotary drive motor are arranged along mounting rack length direction, motor shaft by tap with Simulation drill string is fixedly connected.

Using the above structure, simplify drive mechanism, it is ensured that drill string can move axially simultaneously when rotated, and two kinds It moves non-interference, can preferably simulate actual well drilled scene, i.e., recycle dynamic, Nai Zhiqi during positive reaming, back reaming etc. Going down process drilling fluid agitates the influence to shaft bottom landwaste.

As preferred: the mounting rack bottom has at least two support rollers being arranged in the width direction, the support roller Both ends be set with idler wheel.Using above scheme, it is easily installed fast moving for frame, saves power consumption.

As preferred: further including data collection system, the data collection system includes control cabinet, right on the mounting rack The position of simulation wellbore hole is answered to be evenly distributed with high-definition camera along its length, the both ends of simulation wellbore hole, which are equipped with, to be communicated therewith Difference gauge, simulation wellbore hole outlet end are provided with densitometer, and the side of simulation wellbore hole is equipped with ultrasonic Doppler flowmeter, the high definition Camera, difference gauge and ultrasonic Doppler flowmeter are connected with control cabinet.Using the above structure, by being arranged in control cabinet Acquisition module, and respective sensor or meter etc. are set in equipment, it is recorded in real time, advantageously reduces experimental implementation hardly possible Degree, and conventional efficient is improved, it is convenient for that experiment is repeated several times, improves result accuracy.

Compared with prior art, the utility model has the beneficial effects that

It, can abundant dummy level well using horizontal well horizontal segment dynamic circulation imitative experimental appliance provided by the utility model The dynamic of annular circulation in middle horizontal segment, simulates various state of cyclic operation, sufficiently observes landwaste movement speed in horizontal segment, landwaste point Cloth situation, and quantization and post analysis are carried out by measuring device, most important theories parameter is provided for actual well drilled, reduces drilling well wind Danger.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of mounting rack in embodiment illustrated in fig. 1.

Specific embodiment

The utility model is described in further detail with attached drawing with reference to embodiments.

With reference to Fig. 1 and Fig. 2, the horizontal well horizontal segment dynamic circulation imitative experimental appliance of the utility model mainly includes installation Frame 1, drilling-fluid circulation system 2, driving device 4, sanding device 6 and feeder 7 are horizontally disposed with, thereon wherein including mounting rack 1 It is disposed with simulation wellbore hole 10 and simulation drill string 11 along its length, and simulation wellbore hole 10 and simulation drill string 11 are coaxially disposed, The outer diameter for simulating drill string 11 is smaller than the internal diameter of simulation wellbore hole 10, and front end is protruded into simulation wellbore hole 10, and in simulation wellbore hole 10 It is provided with corresponding sealing structure between end and simulation drill string 11, is sealed into movable sealing structure, even if simulation drill string 11 occurs Rotation, also can guarantee leakproofness between the two.

Simulation wellbore hole 10 is lucite tube, has transparent and high-intensitive characteristic, driving device 4 is for driving simulation to bore Column 11 makes rotating motion and/or is axially moved, and two kinds of movements can carry out simultaneously, can also individually carry out, and drilling-fluid circulation system 2 is main Drill string 11 and mould by Deal With Drilling Fluid equipment and are simulated by manifold including Deal With Drilling Fluid equipment and corresponding connection manifold Quasi- pit shaft 10 connects, to construct relatively true drilling mud circulation operating condition, the sanding device 6 in the present embodiment is mainly used for Sandstone is added into drilling fluid in experiment, to simulate shaft bottom landwaste, as main observation references object, and feeder 7 Then for being filled with gas into drilling fluid in experiment, change property of drilling fluid, can preferably be inflated drilling simulation Experiment.

It is specific that as shown, simulation wellbore hole 10 is supported on mounting rack 1 by wellbore support plate 17, (one end is simulation well Bottom, the other end is simulation well head, and simulates shaft bottom end close to the end of mounting rack 1), and simulation wellbore hole 10 and wellbore support plate 17 Between be detachably connected, or even can be formed by the short cylinder of multistage by flanged joint, the connection of such multisection type is also convenient in reality When testing, eccentric block is installed additional, to facilitate the simulated experiment for carrying out eccentric well circulation, set that there are two solid at the rear of simulation wellbore hole 10 Fixed board 16, input end of one of fixed plate 16 close to simulation wellbore hole 10, the fixed plate 16 and adjacent wellbore support plate 17 It is bolted to connection, and another fixed plate 16 is symmetrically arranged between the end of mounting rack 1, two fixed plates 16 Four guide cylinders 15, are movably set with two drill steel support plates 18 between two fixed plates 16, and two drill steel support plates 18 are logical It crosses through-hole cooperation to be slidably supported on four guide cylinders 15, can be slided along 15 length direction of guide cylinder.

Driving device 4 mainly includes transmission case 40, and transmission case 40 is equipped with axially driving motor 41 and rotary drive motor 42, wherein axially driving motor 41 is vertically arranged, motor shaft is protruded into transmission case, and gear set, tooth are equipped with inside transmission case 40 Wheel group can directly be side by side and along four gears composition of 1 width direction of mounting rack setting, and the electricity of axially driving motor 41 Arbor is connected with any one intermediate gear, and in this way when axially driving motor 41 works, the gear at both ends can be protected in gear set Hold that direction is opposite, and the gear at both ends is pierced by transmission case 40, the length direction between two fixed plates 16 along mounting rack 1 is equipped with Rack gear 12, and in the corresponding transmission case 40 of rack gear 12 both ends gear position, the end gear in transmission case 40 be pierced by its shell it It is engaged afterwards with rack gear 12, when axially driving motor 41 works in this way, then can drive transmission case 40 whole along the length side of mounting rack 1 It slides forwards, backwards.

Rotary drive motor 42 is arranged along the length direction of mounting rack 1, and motor shaft passes through one close to simulation wellbore hole 10 After a drill steel support plate 18 by tap 13 (connector of drilling tool and gooseneck is connected on similar drilling machine simultaneously, i.e., structure is driven on top, In drilling process, when drilling tool rotates, tap 13 will not rotate, and can stablize the drilling fluid for being pumped into gooseneck It is sent into drilling tool) it is connected with the top of simulation drill string 11, the face simulation drill string 11 in the fixed plate 16 of simulation wellbore hole 10 Position is equipped with through hole, and simulation drill string 11 protrudes into simulation wellbore hole 10 after then passing through the through hole, when rotary drive motor 42 When rotation, interface drives simulation drill string 11 to circumferentially rotate.

In the present embodiment, for prevent simulation drill string 11 towards simulation shaft bottom one end moving process in, drill steel support plate 18 with It collides between fixed plate 16, therefore is equipped with sensors in place 1a on a drill steel support plate 18 close to simulation shaft bottom, and It is equipped with matching isolation 1b in a fixed plate 16 of face, sensors in place 1a can connect warning device, when in place When sensor 1a is close or touch trigger piece 1b, then signal is issued in real time to warning device, so that experimenter be reminded to make just Really operation, improves the safety coefficient of system.

And in order to reduce the mobile institute's wasted work rate of device, it is uniform along its length in the bottom of mounting rack 1 in the present embodiment Multiple support rollers 14 are distributed with, wherein support roller 14 is along installation there are two the rear and front end that support roller 14 is located at mounting rack 1 The width direction of frame 1 is arranged, and both ends end is equipped with idler wheel 140 in a rotatable manner, and each idler wheel 140 is each equipped with Brake(-holder) block, for being locked when needed to wheel 140, to keep the stability of mounting rack 1.

Drilling-fluid circulation system 2 mainly includes some processing equipments for being related to drilling fluid and each equipment of connection in the application Pipeline, as shown, processing equipment mainly includes slush pump 20, slurry tank 21, vibrating screen 22, wherein usual vibrating screen 22 is located at On slurry tank 21, be then directly entered in slurry tank 21 by the drilling fluid after vibration filtering, the arrival end of slush pump 20 with Slurry tank 21 is connected, and pumps out end and is connected with inlet tube 2a, and inlet tube 2a has three branch pipes, three branch pipes be respectively drill string into Liquid pipe 2b, annular space inlet tube 2c and bypass pipe 2d are equipped with switch gate valve, drill string inlet tube 2b and annular space feed liquor on three branch pipes Pipe 2c is equipped with fluid flowmeter, and wherein drill string inlet tube 2b is connected to by tap 13 with simulation drill string 11, annular space inlet tube 2c is then connected to the bottom of simulation wellbore hole 10 (i.e. simulation shaft bottom), and the simulation uphole end of simulation wellbore hole 10 is connected with return pipe 2e, It is equipped with triple valve 2f close to the position of simulation wellbore hole 10 on return pipe 2e, bypass pipe 2d then passes through triple valve 2f and return pipe 2e phase Even, the distal end of return pipe 2e is then directly connected on vibrating screen 22, is filtered, and the granule foreign for filtering generation is then unified to collect To recycling bins 25.

Feeder 7 in the present embodiment is located at the upstream (on the basis of fluid flow direction) of sanding device 6, as schemed institute Show, feeder 7 mainly includes air compressor machine 70, air accumulator 71 and drier 72, and the compressed gas that the work of air compressor machine 70 generates is deposited Storage is in air accumulator 71, and drier 72 is connected with air accumulator 71, and the outlet end of drier 72 is connected with annular space inlet tube 2c, this Compressed gas in sample air accumulator 71 can be filled in the drilling fluid of annular space after the drying through drier 72, certainly for convenient for control Aeration quantity, therefore gas open-close valve 73 is provided between drier 72 and annular space inlet tube 2c, while also in gas open-close valve 73 Gas flowmeter is equipped between drier 72.

Sanding device 6 in the application mainly includes automatic sand adding mechanism and artificial sand adding mechanism, as shown, automatic add Sand mechanism includes resevoir sand tank 60 and the automatic sand adding device 600 that is attached thereto, and automatic sand adding device 600 is connected with annular space inlet tube 2c, It is mainly used for that adding amount is larger, diameter is less than the regular shape gravel of 8mm effect, and artificial sand adding mechanism then mainly include with Annular space inlet tube 2c connected conical hopper 61, the two communicating position are equipped with hand close to simulation shaft bottom, the bottom of conical hopper 61 Dynamic plus sand valve 610, is mainly used for carrying out that adding amount is less, gravel in irregular shape, by two different sand adding mechanisms, Different operating conditions can be sufficiently simulated, i.e., normal fine sand returns out or the annular space of well wall dropping block dynamic, by observing different shape gravel The annular space the case where, actual well drilled problem encountered can be more reacted.

Similarly, it is raising system operation reliability, and for the generality of different well drilling tool Experiment Parameters, meets different Wellbore simulates demand, and the drilling-fluid circulation system 2 in the present embodiment further includes sand pump 23 and spare inlet tube 2g, as shown, The input end of sand pump 23 is connected with slurry tank 21, pump out end and meanwhile be connected to inlet tube 2a and spare inlet tube 2g, it is spare into Liquid pipe 2g is arranged in parallel with inlet tube 2a, while one end far from sand pump 23 is same with three branch pipes (drill string inlet tube 2b, Annular space inlet tube 2c is connected with bypass pipe 2d), and certain slush pump 20 is also connected with spare inlet tube 2g, slush pump 20 with it is spare Mud pump valve 200 is equipped between inlet tube 2g and liquid pipe 2a, and in spare inlet tube 2g and liquid pipe 2a and 23 connected position of sand pump It is respectively equipped with sand pump switch valve 230,230 ', slush pump can be realized by mud pump valve 200 and sand pump switch valve 230,230 ' 20 with the selection of sand pump 23；Sand pump 23 is mainly used for the circulation line of small size, and pipeline pressure is lower, and slush pump 20 is main For large scale pipeline, pipeline pressure is higher.

And it is the flow direction of gas when inflating convenient for control, therefore gas flow control valve is additionally provided on annular space inlet tube 2c 74, when the switch gate valve on inlet tube 2a and spare inlet tube 2g is closed, the switch gate valve on annular space inlet tube 2c is opened, that is, is not had There is liquid to enter pipeloop, closing gas flow control valve 74 can then make compressed gas enter simulation brill through drill string inlet tube 2b Inside column 11, complete air-filling well-drilling simulated experiment is realized, if only simulating shaft bottom recurrent state, openable gas certainly Flow direction control valve 74, simultaneously closes off the switch gate valve on annular space inlet tube 2c, such gas can directly through annular space inlet tube 2c into Enter and simulate shaft bottom, similarly, the switch gate valve on inlet tube 2a and spare inlet tube 2g can also be opened according to experiment demand, thus Realize gas-liquid-solid three-phase in the simulation of different drilling conditions.

The exit of slurry tank 21 is provided with slurry outlet valve 210, and slush pump 20 and sand pump 23 are respectively positioned on slurry outlet valve 210 downstream is preferably to clean to pipeline, therefore be also configured with clean water tank 24 in the present embodiment, the outlet of clean water tank 24 End is provided with clear water switch valve 240, and shares with slurry outlet pipeline, while being connected with slush pump 20 and sand pump 23.

In addition, being set on the pipeline of return pipe 2e in the present embodiment to improve the accuracy of conventional efficient and experimental result It is equipped with solid-liquid separator 3, and solid-liquid separator 3 is between vibrating screen 22 and triple valve 2f, it can be to being come out at simulation well head Drilling fluid directly carries out drilling fluid, and realization is automatically separated and real time measure, and it is enterprising to vibrating screen 22 thus to save experimenter The step of row particle recycles, and recycling is more complete, is not susceptible to miss and cause experimental results error larger.

For convenient for quickly carrying out analysis of experimental results, the application is provided with corresponding data collection system, mainly wraps Include control cabinet 8, the length direction on mounting rack 1 along simulation wellbore hole 10 is evenly distributed at least two high-definition cameras 80, and mould The both ends of quasi- pit shaft 10 are mating to be provided with the difference gauge 81 being attached thereto, and densitometer 82, densitometer are provided on return pipe 2e 82 between solid-liquid separator 3 and triple valve 2f, and the side of simulation wellbore hole 10 is equipped with ultrasonic Doppler flowmeter 83, control cabinet There is data and graphic recording module, high-definition camera 80, difference gauge 81, densitometer 82 and ultrasonic Doppler flowmeter 83 in 8 It is connected with logging modle in control cabinet 8, the parameter or influence that can be recorded on each sensor or equipment record, meanwhile, also It can be by fluid flowmeter, gas flowmeter and the rotation speed and axial movement speed parameter signal access of simulating drill string 11 It in control cabinet 8, is recorded and is shown, adjusted in real time convenient for experimenter and the data preparation in later period is analyzed.

With reference to Fig. 1 and Fig. 2, the step of being inflated drilling well dynamic analog using the utility model, is as follows:

1) it checks each experimental facilities state, opens corresponding power supply；

2) according to simulation drill string 11 and 10 size of simulation wellbore hole, selection uses slush pump 20 or sand pump 23, if selection uses Slush pump 20 is used as power source, then opens mud pump valve 200, and closes sand pump switch valve 230,230 ', conversely, if selection uses Sand pump 23 is power source, then closes mud pump valve 200, opens sand pump switch valve 230,230 '；

3) according to by experimental selection sand adding mechanism to be simulated, i.e., the size of gravel is added as needed and the scale of construction is selected It selects, it is ensured that automatic sand adding device 600 and manual plus sand valve 610 are in close state, then according to selection in corresponding resevoir sand tank 60 Or sand grains is added in conical hopper 61；

4) it checks each valve state, opens the switch gate valve of inlet tube 2a, spare inlet tube 2g and drill string inlet tube 2b, together When open slurry outlet valve 210, and adjust triple valve 2f, return pipe 2e and vibrating screen 22 made be in connected state, close and bypass The switch gate valve on switch gate valve, closing gas open-close valve 73, closing annular space inlet tube 2c on pipe 2d, such as uses automatic sand adding Mechanism then starts automatic sand adding device 600, and such as selection, which uses, manually adds sand, then opens and add sand valve 610 manually；

5) turn on pump such as uses sand pump 23, then the aperture of drill string inlet tube 2b upper switch gate valve is adjusted, and observes flow number Variation, the corresponding utility model open position of record different flow, and as used slush pump 20, then can directly adjust pump impulse to pair Answer the number that rushes of flow, and through mud can with normal circulation, i.e., mud out of slurry tank 21 by 20/ sand pump 23 of slush pump through drill string Inlet tube 2b is sent into simulation drill string 11, then flows back in slurry tank 21 through return pipe 2e through vibrating screen 22；

6) the switch gate valve on drill string inlet tube 2b is closed, the switch gate valve on bypass pipe 2d is opened, then slowly opens Sand grains is sent into simulation shaft bottom, sand amount to be designed by drilling fluid with minimum speed by the switch gate valve on annular space inlet tube 2c After adding, corresponding sand adding mechanism is closed；

7) the switch gate valve on drill string inlet tube 2b is opened, opens gas open-close valve 73, and to be simulated according to experiment institute Operating condition, decision open or close gas flow control valve 74, that is, determine it is gas to be filled with to annular space or into simulation drill string 11 It is filled with gas, the rotary motion and/or axial movement followed by simulation drill string 11 operate, and observe sand in dummy level section Grain situation of movement directly carries out separation weighing to returning out sand grains by solid-liquid separator 3, and makes a record, and is in the present embodiment It prevents simulation drill string 11 larger to the percussion of sand grains, therefore is connected with simulation drill bit in the front end of simulation drill string 11, simulation is bored Head is substantially in pre-small post-large cone cell, and end is enclosed construction, and side offers the hydrophthalmia being connected to simulation drill string 11, and water Eye is in ellipticity；

During this, the dense of sand grains can be recorded in real time by being combined by high-definition camera 80 and ultrasonic Doppler flowmeter 83 Degree distribution and its migration velocity, and record into control cabinet 8 in logging modle, at the same in testing equipment operating parameter, such as Mud flow rate, the velocity of rotation for simulating drill string 11, axial movement speed, pressure in simulation wellbore hole 10 etc. are by control cabinet 8 one One acquisition and recording；

8) it repeats the above steps, carries out the dynamic analog of various flow, multi-state circulation, and carry out experimental record；

9) experiment finishes, and after all returning out to the sand grains in simulation wellbore hole 10, opens clear water switch valve 240, closes mud Outlet valve 210 is starched, pipeline and equipment are cleaned using clear water, it is ensured that equipment cleaning degree is conducive to extend its service life；

10) pump is closed, according to record data, carries out comprehensive analysis.

During the experiment, driving device 4 is mainly made full use of to realize the axial movement and rotary motion of simulation drill string 11, To meet the demand of the simulation of horizontal segment cyclic process multi-state, it can especially observe Annular Cuttings migration rule, quantify It measures Annular Cuttings radial direction concentration and the chips size in annular space difference basin forms, take the research such as rock for the sand washing of aerated mud Effectively reliable data supporting is provided, certain this system also not only can only be used to the simulation of air-filling well-drilling, by each valve Opening and closing, can also be achieved the different working condition experimentings of independent liquid-solid two-phase, independent gas-particle two-phase, generally use valence with more good Value.

It fully considers use environment simultaneously, meets the simulated experiment of different size wellbores, experimental system is made to have more promotion price Value, the closed loop that this system also achieves the filling of annular space sand grains and collects carry out automatically, i.e., in experimentation, can connect at any time Continue the control sand grains implantation concentration of property to simulate dynamic effects of the variation to annular space of drill bit rate of penetration, system entirety user Just, cost is extremely low, and sand grains used is separable in simulated experiment recycles and reuses, and safety and environmental protection has great scientific research value.

Finally, it should be noted that foregoing description is only the preferred embodiment of the utility model, the common skill of this field Art personnel are under the enlightenment of the utility model, under the premise of without prejudice to the utility model aims and claim, can make Multiple similar expressions, such transformation are each fallen within the protection scope of the utility model.

Claims (7)

1. a kind of horizontal well horizontal segment dynamic circulation imitative experimental appliance, including horizontally disposed mounting rack (1), the mounting rack (1) there is the simulation wellbore hole (10) set gradually along its length and simulation drill string (11) on, it is characterised in that: further include:

Drilling-fluid circulation system (2), for supplying drilling fluid to simulation wellbore hole (10) and simulation drill string (11) and carrying out drilling fluid Processing；

Driving device (4), for driving, simulation drill string (11) is mobile along simulation wellbore hole (10) length direction and/or driving simulation is bored Column (11) rotation；

Sanding device (6) is connected with drilling-fluid circulation system (2), for adding sand into drilling fluid in experiment.

2. horizontal well horizontal segment dynamic circulation imitative experimental appliance according to claim 1, it is characterised in that: the drilling well Fluid circulation (2) includes inlet tube (2a) and slush pump interconnected (20) and slurry tank (21), the slush pump (20) outlet end is connected to inlet tube (2a), and the inlet tube (2a) is connected with drill string inlet tube (2b), annular space inlet tube (2c) and bypass pipe (2d)；

The drill string inlet tube (2b) is connected to the top of simulation drill string (11), annular space inlet tube (2c) and simulation wellbore hole (10) The top of bottom end connection, the simulation wellbore hole (10) is equipped with return pipe (2e), which is equipped with vibrating screen (22), institute It states vibrating screen (22) to be connected with slurry tank (21), the bypass pipe (2d) is connected by triple valve (2f) with return pipe (2e).

3. horizontal well horizontal segment dynamic circulation imitative experimental appliance according to claim 2, it is characterised in that: further include using In the feeder (7) inflated in experiment into simulation wellbore hole (10) or simulation drill string (11), the feeder (7) includes Air compressor machine (70), air accumulator (71) and drier (72), the drier (72) are connected by pipeline with annular space inlet tube (2c).

4. horizontal well horizontal segment dynamic circulation imitative experimental appliance according to claim 2 or 3, it is characterised in that: described Drilling-fluid circulation system (2) further includes sand pump (23) and spare inlet tube (2g), the input end and slurry tank of the sand pump (23) (21) it is connected, outlet end is connected to inlet tube (2a) and spare inlet tube (2g) simultaneously, the spare inlet tube (2g) and feed liquor Pipe (2a) is arranged in parallel, and is connected simultaneously with drill string inlet tube (2b), annular space inlet tube (2c) and bypass pipe (2d), the mud The outlet end for pumping (20) is also connected with spare inlet tube (2g) simultaneously.

5. horizontal well horizontal segment dynamic circulation imitative experimental appliance according to claim 1, it is characterised in that: the driving Device (4) includes transmission case (40), which is equipped with axially driving motor (41) and rotary drive motor (42), is passed Moving has the gear driven by axially driving motor (41) in case (40), symmetrical in the two sides of transmission case (40) on mounting rack (1) Equipped with rack gear (12), wheel and rack (12) engagement, the rotary drive motor (42) sets along mounting rack (1) length direction It sets, motor shaft is fixedly connected by tap (13) with simulation drill string (11).

6. horizontal well horizontal segment dynamic circulation imitative experimental appliance according to claim 1 or 5, it is characterised in that: described Mounting rack (1) bottom has at least two support rollers (14) being arranged in the width direction, and the both ends of the support roller (14) are set with There are idler wheel (140).

7. horizontal well horizontal segment dynamic circulation imitative experimental appliance according to claim 5, it is characterised in that: further include number According to acquisition system, the data collection system includes control cabinet (8), and the position of simulation wellbore hole (10) is corresponded on the mounting rack (1) It sets and is evenly distributed with along its length high-definition camera (80), the both ends of simulation wellbore hole (10) are equipped with the difference gauge communicated therewith (81), simulation wellbore hole (10) outlet end is provided with densitometer (82), and the side of simulation wellbore hole (10) is equipped with ultrasonic Doppler flow It counts (83), the high-definition camera (80), difference gauge (81) and ultrasonic Doppler flowmeter (83) are connected with control cabinet (8).