CN109667541A - Dynamic equilibrium self-propelled water jet borehole test device and method under confining pressure state - Google Patents
Dynamic equilibrium self-propelled water jet borehole test device and method under confining pressure state Download PDFInfo
- Publication number
- CN109667541A CN109667541A CN201811485186.9A CN201811485186A CN109667541A CN 109667541 A CN109667541 A CN 109667541A CN 201811485186 A CN201811485186 A CN 201811485186A CN 109667541 A CN109667541 A CN 109667541A
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- confining pressure
- pressure
- fixed plate
- water jet
- inner cylinder
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention discloses dynamic equilibrium self-propelled water jet borehole test device and method under a kind of confining pressure state, which includes confining pressure cabin, and confining pressure cabin includes columnar shell and the drive end bearing bracket and rear end cap for being covered in shell both ends；The inner cylinder that is vertically equipped with sealing perforation drive end bearing bracket on drive end bearing bracket and can move axially, inner cylinder end are equipped with high-pressure water jet spray head, and the inner cylinder other end is communicated with high-pressure rubber pipe as connecting pin sealing；Outer cylinder is cased with outside inner cylinder, one end sealing of outer cylinder is fixed on drive end bearing bracket, movable sealing between the other end and inner tank theca of outer cylinder；The test device further includes the dynamic equilibrium force measuring machine of the dynamic equilibrium balance weight mechanism for counterweight needed for measuring different confining pressures and the propulsive force for measuring water jet drilling.Energy simulated high-pressure water jet of the present invention drilling, be injected from into when dynamic balance state, can the real time measure jetting stream propulsive force.
Description
Technical field
The invention belongs to self-propelled high pressure water jet fields, and in particular to dynamic equilibrium self-propelled under a kind of confining pressure state
Water jet borehole test device and method.
Background technique
TRD (Tight Radius Drilling Technology, that is, extremely short radius drilling technology) technology is in coal bed gas
The a certain depth in the shaft bottom of well, the one or more for boring 90 degree nearly with its from vertical well using diverter and waterpower cutting technique are horizontal
Hole is formed centered on wellbore, the reservoir reconstruction coverage of radial distribution, and it is more micro- can to link up near wellbore zone and distant place
Crack and Fracture System release near wellbore stress and concentrate, and link up the multipurposes such as the original crack in coal seam and guiding pressure break, in turn
Achieve the purpose that coal bed gas well individual well increases production.In order to further carry out the research of high-pressure water jet injection drilling, need to develop one
The test device and method that self-propelled high pressure water jet drilling is carried out under kind simulation shaft bottom confining pressure are surveyed under dynamic balance state
Try under different confining pressures, different hardness coal sample, different nozzle structure floodage, when high-pressure water jet is crept into from into power, simulation
The rate of penetration of different hardness coal sample, different spray head drilling effects, provide Research foundation for field test.Current test device
In high-pressure water jet drilling, cannot simulate be injected from into when dynamic balance state, can not real-time testing jetting stream
Propulsive force, above-mentioned deficiency are unfavorable for carrying out high-pressure water jet volume increase research.
Summary of the invention
For the defects in the prior art and insufficient, the present invention provides dynamic equilibrium self-propelled under a kind of confining pressure state
Water jet borehole test device and method overcomes current test device in high-pressure water jet drilling, cannot simulate and be injected from
Into when dynamic balance state, can not real-time testing jetting stream propulsive force the defects of.
In order to achieve the above objectives, the invention adopts the following technical scheme:
Dynamic equilibrium self-propelled water jet borehole test device under a kind of confining pressure state, including confining pressure cabin, the confining pressure
Cabin includes columnar shell and the drive end bearing bracket and rear end cap for being covered in shell both ends；It is vertically equipped on the drive end bearing bracket
Inner cylinder sealing perforation drive end bearing bracket and can moved axially, the inner cylinder end in confining pressure cabin are equipped with high-pressure water jet spray head,
Confining pressure out of my cabin the inner cylinder in portion end as connecting pin sealing be communicated with high-pressure rubber pipe；It is cased with outside the confining pressure out of my cabin inner cylinder in portion
One end sealing of outer cylinder, outer cylinder is fixed on drive end bearing bracket, movable sealing between the other end and inner tank theca of outer cylinder；
The test device further includes dynamic equilibrium balance weight mechanism and dynamic equilibrium force measuring machine；The dynamic equilibrium counter weight machine
Structure includes the Pipeline clip being fixed on the connecting pin, and cotton rope is connected on the Pipeline clip, and cotton rope is described around being fixed on
It is hung after fixed pulley on drive end bearing bracket and is connected to weights；The dynamic equilibrium force measuring machine includes covering on the high-pressure rubber pipe
Spring, spring are fixed on high-pressure rubber pipe close to one end of inner cylinder, and one end far from inner cylinder is vertically connected with slide plate, the slide plate
It can be slidably mounted at and be parallel on the sliding rail of high-pressure rubber pipe, the end of the sliding rail is fixed on the first fixation in the middle part of spring
On plate, first fixed plate is parallel to slide plate and is mounted below spring and on the channel steel being fixed on outer cylinder；?
Force snesor is equipped between one fixed plate and slide plate.
The invention also includes following technical characteristics:
Optionally, the both ends of the force snesor are equipped with the briquetting for being close to the first fixed plate and slide plate；
One end of the channel steel is welded with the link block for being close to outer cylinder lower wall, and the link block upper end, which is connected with, to be covered in outer cylinder
Fastening block on upper wall, the fastening block and link block are tightly fastened and cover on outer cylinder；
Sides that are parallel and being located at spring two sides there are two being bolted in the two side walls of the other end of the channel steel
Fixed plate, the first fixed plate described in vertical welding between two side fixed plates, in the lower section for the briquetting for being close to the first fixed plate
Equipped with fixed briquetting support plate on the first fixing plate；It is equipped in the lower section for being close to the briquetting of slide plate and is vertically connected on two sides
The second fixed plate between fixed plate；
There are two the sliding rails, and two sliding rails run through first fixed plate, the second fixed plate and slide plate, and sliding rail in parallel
End it is fixed on the first fixing plate.
Optionally, the side fixed plate is rectangular configuration；
First fixed plate is the convex shape structure that lower end is equipped with opening, and the top of the first fixed plate is pressed to be close to
Block, to the fixation sliding rail, the lower ending opening of the first fixed plate is used for spring and high pressure at the both ends of the lower part of the first fixed plate
Sebific duct passes through；
The vertical cross-section of the briquetting support plate is L-shaped structure, and it is solid that the end of the transverse slat of briquetting support plate is welded on first
On fixed board, the riser upper end of briquetting support plate, which is equipped with, cooperates the arc groove being close to briquetting lower wall；
Second fixed plate is inverted U-shaped structure, and the opening of the lower end of the second fixed plate is used for spring and high-pressure glue
Pipe across；The upper end of second fixed plate, which is equipped with, cooperates the arc groove being close to briquetting lower wall；
The slide plate is cross-shaped structure, and the top of slide plate is for being close to the briquetting, and the left and right ends of slide plate are to pass through
Sliding rail is worn, the lower part of slide plate offers arc groove to facilitate high-pressure rubber pipe to pass through.
Optionally, anti-shock pressure meter, safety overflow valve, water filling gas vent are equipped in the case top and enclosed for moving
Two hanging rings of ballasting；The fixing support rack to fix and support coal sample is equipped in the confining pressure cabin, fixing support rack is close
Rear end cap is arranged, and is additionally provided with filter screen in the confining pressure cabin above fixing support rack, brill when preventing high-pressure water jet from drilling
Slag sprays and blocks the safety overflow valve；The drive end bearing bracket is equipped with the shut-off valve that discharges water；The housing bottom encloses there are two setting
Ballasting bracket.The anti-shock pressure meter is for observing pressure changing in confining pressure cabin, pressure limit 0-16MPa, shock pressure
Power table and safety overflow valve inlet are additionally provided with fine filter, are used for secondary filter drilling cuttings, guarantee that anti-shock pressure meter and safety overflow
Flow the normal use of valve.Safety overflow valve keeps pressure in desired confining pressure cabin, safety overflow valve pressure when being used to spray drilling
Adjustable from 0-10MPa, water filling gas vent fills the water and excludes the additional air in confining pressure cabin when being used to originate.Discharge water one side of shut-off valve
Face can prevent safety overflow valve blocking from carrying out safeguard protection pressure release, on the other hand can be with the residual in rapid blow-down confining pressure cabin
Water.
Optionally, airtight cavity, the airtight cavity and confining pressure cabin are formed between wall and inner tank theca in the outer cylinder
Between sealing be communicated with connection sebific duct, to keep hydraulic pressure in confining pressure cabin and the intracorporal pressure balance of the closed chamber, thus
The hydraulic pressure in confining pressure cabin is offset to the thrust of inner cylinder.
Optionally, the fixed pulley is mounted on the drive end bearing bracket by pulley yoke；Between fixed pulley and Pipeline clip
Cotton rope and the central axes of inner cylinder be parallel to each other.
Optionally, the rear end cap removable seal lid is closed in shell end, and two are equipped on the side wall of the rear end cap
A first pinboard is set on the side wall of shell end for being close to rear end cap there are two parallel tight with two the first pinboards respectively
Second pinboard of patch, it is hinged by bolt between first pinboard and the second pinboard, to along bolt Unscrew
Rear end cap；
The rear end cap is equipped with the handle to pull rear end cap；
The edge of the rear end cap is equipped with to be close to rear end cap sealing to be fixed on the bolt of shell end for one week.
Optionally, the lateral wall of the channel steel is equipped with the shift scale to measure spring elongation.
Optionally, the inner cylinder, outer cylinder and shell coaxial arrangement, are equipped with sealing element, institute between the inner barrel and outer barrel
Stating sealing element is that resistance is small and the sealing element of sealed reliable；
The inner cylinder is 500mm along the stroke that outer cylinder moves；
The outer cylinder is fixed on drive end bearing bracket by flange, and carries out end face seal.
The present invention also provides a kind of dynamic equilibrium self-propelled water jet borehole test methods under confining pressure state, using institute
Dynamic equilibrium self-propelled water jet borehole test device is tested under the confining pressure state stated, specifically includes the following steps:
(A) counterweight test the following steps are included:
A1: after filling cabin water from the water filling gas vent on confining pressure cabin, water filling gas vent is blocked；
A2: being connected to water pump on high-pressure rubber pipe, and high-pressure water jet spray head starts water spray to confining pressure cabin and reaches requirement confining pressure, leads to
Cross anti-shock pressure meter reading；
A3: it under the confining pressure, by adjusting the counterweight after weights record inner cylinder uniform motion, obtains needed for the confining pressure
Counterweight；
A4: safety overflow valve, the counterweight of weights needed for recording different confining pressures are adjusted；
(B) testing procedure:
B1: the shut-off valve that discharges water, the residual water in rapid blow-down confining pressure cabin are opened, and inner cylinder is pulled to close to drive end bearing bracket；
B2: rear end cap is opened, coal sample and fixation are put into confining pressure cabin, be spirally connected rear end cap；
B3: safety overflow valve pressure is set up, corresponding weights under the test group confining pressure are configured；
B4: it opens water pump and starts high-pressure injection drilling, record force snesor numerical value reads spring displacement amount from shift scale
It obtains to stress value and rate of penetration；Wherein, self-advancing type injection drilling propulsive force is equal to sensor readings plus spring force；
Pressure and flow during record parallel water pump；
B5: when inner cylinder completes a stroke, self-propelled drilling is completed, and rear end cap is opened, and takes out sample, observation, measurement
With record borehole data.
B6: repeating above steps, and measurement obtains different confining pressure pressure floodages, different hardness system coal seam and difference
Test data under nozzle structure.
Compared with prior art, the present invention beneficial has the technical effect that
(I) dynamic equilibrium self-propelled water jet borehole test device under confining pressure state of the invention, can simulate in difference
Under the floodage of confining pressure pressure, different hardness system coal seam, different nozzle structures, self-propelled high pressure water jet drilling effect is carried out
Fruit (borehole wall state, bore diameter, rate of penetration), slush pump running parameter, from into power size etc. test.Solution of the present invention
Existing test device of having determined cannot simulate the dynamic balance state of self-advancing type injection drilling under confining pressure floodage, can not be real-time
The problem of testing self-advancing type injection drilling propulsive force.
(II) the dynamic equilibrium balance weight mechanism in the present invention will overcome the cross force of hermetic resistance to be converted to weights
Gravity carries out exact weights by replacing different weights in test process, and when counterweight is subject to inner cylinder uniform motion.
(III) in the dynamic equilibrium force measuring machine in the present invention, when self-advancing type injection is crept into, spring drives slide plate mobile, sliding
Plate applies pressure to the force snesor between slide plate and the first fixed plate, and spring extends, and obtains spring force and power
The sum of data of sensor are spray head self-advancing type injection drilling propulsive force.
(IV) anti-shock pressure meter in the present invention is for observing pressure changing in confining pressure cabin, pressure limit 0-
16MPa, anti-shock pressure meter and safety overflow valve inlet are additionally provided with fine filter, are used for secondary filter drilling cuttings, guarantee shock pressure
The normal use of power table and safety overflow valve.Safety overflow valve keeps pressure in desired confining pressure cabin, peace when being used to spray drilling
Full overflow valve pressure is adjustable from 0-10MPa, and water filling gas vent fills the water and exclude the additional air in confining pressure cabin when being used to originate.It puts
On the one hand water shut-off valve can prevent safety overflow valve blocking from carrying out safeguard protection pressure release, on the other hand can be with rapid blow-down confining pressure
Residual water in cabin.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the overall structure diagram that inner cylinder of the invention is in original state.
Fig. 3 is the overall structure diagram that inner cylinder of the invention is in final state.
Fig. 4 is confining pressure cabin schematic diagram of internal structure of the invention.
Fig. 5 is the structural schematic diagram of dynamic equilibrium force measuring machine of the invention.
Each label indicates in figure are as follows: 1- confining pressure cabin, 2- dynamic equilibrium balance weight mechanism, 3- dynamic equilibrium force measuring machine, in 4-
Cylinder, 5- high-pressure water jet spray head, 6- high-pressure rubber pipe, 7- outer cylinder, 8- are connected to sebific duct, 9- coal sample；
11- shell, 12- drive end bearing bracket, 13- rear end cap, 14- fixing support rack, 15- filter screen,
111- anti-shock pressure meter, 112- safety overflow valve, 113- water filling gas vent, 114- hanging ring, 115- confining pressure cabin bracket,
The second pinboard of 116-；121- discharges water shut-off valve；The first pinboard of 131-, 132- handle；
21- Pipeline clip, 22- cotton rope, 23- fixed pulley, 24- weights；
31- spring, 32- slide plate, 33- sliding rail, the first fixed plate of 34-, 341- briquetting support plate, 35- channel steel, 351- connection
Block, 352- fastening block, 353- shift scale, 36- force snesor, 361- briquetting, the side 37- fixed plate, the second fixed plate of 38-.
Specific embodiment
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below
Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.
Embodiment 1:
As shown in Fig. 1 to 5, the present embodiment provides dynamic equilibrium self-propelled water jet borehole tests under a kind of confining pressure state
Device, including confining pressure cabin 1, the confining pressure cabin 1 include columnar shell 11 and the drive end bearing bracket 12 for being covered in shell both ends
With rear end cap 13；Sealing perforation drive end bearing bracket 12 and the inner cylinder 4 that can move axially vertically are equipped on the drive end bearing bracket 12, positioned at enclosing
4 end of inner cylinder in ballasting 1 is equipped with high-pressure water jet spray head 5, and the end of the inner cylinder 4 outside confining pressure cabin 1 is as connecting pin
Sealing is communicated with high-pressure rubber pipe 6；Outer cylinder 7 is cased with outside inner cylinder 4 outside confining pressure cabin 1, one end sealing of outer cylinder 7 is fixed on front end
On lid 12, movable sealing between 4 outer wall of the other end and inner cylinder of outer cylinder 7；
The test device further includes dynamic equilibrium balance weight mechanism 2 and dynamic equilibrium force measuring machine 3；The dynamic equilibrium counterweight
Mechanism 2 includes the Pipeline clip 21 being fixed on the connecting pin, cotton rope 22 is connected on Pipeline clip 21, cotton rope 22 is around fixation
It is hung after the fixed pulley 23 on the drive end bearing bracket 12 and is connected to weights 24；The dynamic equilibrium force measuring machine 3 includes covering in institute
The spring 31 on high-pressure rubber pipe 6 is stated, spring 31 is fixed on high-pressure rubber pipe 6 close to one end of inner cylinder 4, and the other end is vertically connected with
Slide plate 32, the slide plate 32, which can be slidably mounted at, to be parallel on the sliding rail 33 of high-pressure rubber pipe 6, and the sliding rail 33, which is vertically fixed on, to be leaned on
In first fixed plate 34 at 31 middle part of short round spring, the first fixed plate 34 is mounted on 31 lower section of spring and is fixed on outer cylinder 7
Channel steel 35 on；Force snesor 36 is equipped between the first fixed plate 34 and slide plate 32.
In the present embodiment, the both ends of force snesor 36 are equipped with the briquetting 361 for being close to the first fixed plate 34 and slide plate 32；Slot
One end of steel 35 is welded with the link block 351 for being close to 7 lower wall of outer cylinder, and 351 upper end of link block, which is connected with, to be covered in 7 upper wall of outer cylinder
On fastening block 352, the fastening block 352 and link block 351 are tightly fastened and cover on outer cylinder 7；The two of the other end of channel steel 35
Side fixed plates 37 that are parallel opposite and being located at 31 two sides of spring there are two being bolted on a side wall, in two side fixed plates
First fixed plate 34 described in vertical welding between 37 is equipped in the lower section for being close to the briquetting 361 of the first fixed plate 34 and is fixed on the
Briquetting support plate 341 in one fixed plate 34；It is solid equipped with two sides are vertically connected in the lower section for being close to the briquetting 361 of slide plate 32
The second fixed plate 38 between fixed board 37；There are two sliding rails 33, and two sliding rails 33 run through first fixed plate 34, second in parallel
Fixed plate 38 and slide plate 32, and the end of sliding rail 33 is fixed in the first fixed plate 34.
Specifically, side fixed plate 37 is rectangular configuration；First fixed plate 34 is the convex shape structure that lower end is equipped with opening, the
The top of one fixed plate 34 is to be close to briquetting 361, and the both ends of the lower part of the first fixed plate 34 are to the fixation sliding rail 33, and
The lower ending opening of one fixed plate 34 is passed through for spring 31 and high-pressure rubber pipe 6；The vertical cross-section of briquetting support plate 341 is L shape knot
Structure, the end of the transverse slat of briquetting support plate 341 are welded in the first fixed plate 34, and the riser upper end of briquetting support plate 341 is equipped with
Cooperate the arc groove being close to 361 lower wall of briquetting；Second fixed plate 38 is inverted U-shaped structure, under the second fixed plate 38
The opening at end is passed through for spring 31 and high-pressure rubber pipe 6；The upper end of second fixed plate 38 is equipped with to be close to the cooperation of 361 lower wall of briquetting
Arc groove；Slide plate 32 is cross-shaped structure, and the top of slide plate 32 is for being close to the briquetting 361, the left and right two of slide plate 32
It holds and offers arc groove to facilitate high-pressure rubber pipe 6 to pass through to the lower part through sliding rail 33, slide plate 32.
It is equipped with anti-shock pressure meter 111, safety overflow valve 112, water filling gas vent 113 at the top of shell 11 and is enclosed for moving
Two hanging rings 114 of ballasting；The fixing support rack 14 to fix and support coal sample, fixed support are equipped in the confining pressure cabin 1
Frame 14 is arranged close to rear end cap 13, filter screen 15 is additionally provided in the confining pressure cabin 1 above fixing support rack 14, to prevent high pressure
Boring mud sprays and blocks the safety overflow valve 112 when water jet drills；The drive end bearing bracket 12 is equipped with the shut-off valve 121 that discharges water；
11 bottom of shell is set there are two confining pressure cabin bracket 115, to support confining pressure cabin 1 and fix with ground.The antidetonation pressure
Table 111 is for observing 1 pressure changing in confining pressure cabin, pressure limit 0-16MPa, anti-shock pressure meter 111 and safety overflow
112 entrance of valve is additionally provided with fine filter, is used for secondary filter drilling cuttings, guarantees anti-shock pressure meter 111 and safety overflow valve 112
Normal use.Safety overflow valve 112 keeps pressure in desired confining pressure cabin 1,112 pressure of safety overflow valve when being used to spray drilling
Adjustable from 0-10MPa, water filling gas vent 113 fills the water and excludes the additional air in confining pressure cabin 1 when being used to originate.Discharge water shut-off valve
121 one side can prevent the blocking of safety overflow valve 112 from carrying out safeguard protection pressure release, on the other hand can be with rapid blow-down confining pressure cabin
Residual water in 1.
Airtight cavity is formed between 4 outer wall of 7 inner wall of outer cylinder and inner cylinder, is sealed between the airtight cavity and confining pressure cabin 1
It is communicated with connection sebific duct 8, to keep hydraulic pressure and the intracorporal pressure balance of the closed chamber in confining pressure cabin 1, is enclosed to offset
The thrust of hydraulic pressure in ballasting 1 to inner cylinder 4.
Fixed pulley 23 is mounted on the drive end bearing bracket 12 by pulley yoke, and dynamic equilibrium balance weight mechanism will overcome sealing
The cross force of resistance is converted to the gravity of weights, passes through in test process and replaces different weights progress exact weights,
It is subject to inner cylinder uniform motion when counterweight.
In the present embodiment, 13 removable seal lid of rear end cap is closed in 11 end of shell, on the side wall of the rear end cap 13
If there are two the first pinboard 131, set on the side wall of 11 end of shell for being close to rear end cap 13 there are two respectively with two the
The second pinboard 116 that one pinboard 131 is close in parallel, by inserting between first pinboard 131 and the second pinboard 116
Pin is hinged, to along bolt Unscrew rear end cap 13；Rear end cap 13 is equipped with the handle 132 to pull rear end cap 13；Afterwards
The edge of end cap 13 is equipped with to be close to the sealing of rear end cap 13 to be fixed on the bolt of 11 end of shell for one week.It is set by above-mentioned
It sets, rear end cap 13 can be made rotatably to open, so as to replace simulation coal sample.
The lateral wall of channel steel 35 is equipped with the shift scale 353 to measure 31 elongation of spring.
Inner cylinder 4, outer cylinder 7 and shell 11 are coaxially disposed, and sealing element, the sealing are equipped between the inner cylinder 4 and outer cylinder 7
Part is that resistance is small and the sealing element of sealed reliable；Inner cylinder 4 is 500mm along the stroke that outer cylinder 7 moves；Outer cylinder 7 is fixed by flange
On drive end bearing bracket 12, and carry out end face seal.
Embodiment 2:
The present embodiment additionally provides a kind of dynamic equilibrium self-propelled water jet borehole test method under confining pressure state, the survey
Method for testing is tested using dynamic equilibrium self-propelled water jet borehole test device under the confining pressure state in embodiment 1, is had
Body the following steps are included:
(A) counterweight test the following steps are included:
A1: after filling cabin water from the water filling gas vent on confining pressure cabin, water filling gas vent is blocked；
A2: being connected to water pump on high-pressure rubber pipe, and high-pressure water jet spray head starts water spray to confining pressure cabin and reaches requirement confining pressure, leads to
Cross anti-shock pressure meter reading；
A3: it under the confining pressure, by adjusting the counterweight after weights record inner cylinder uniform motion, obtains needed for the confining pressure
Counterweight；
A4: safety overflow valve, the counterweight of weights needed for recording different confining pressures are adjusted；
(B) testing procedure:
B1: the shut-off valve that discharges water, the residual water in rapid blow-down confining pressure cabin are opened, and inner cylinder is pulled to close to drive end bearing bracket；
B2: rear end cap is opened, coal sample and fixation are put into confining pressure cabin, be spirally connected rear end cap；
B3: safety overflow valve pressure is set up, corresponding weights under the test group confining pressure are configured；
B4: it opens water pump and starts high-pressure injection drilling, record force snesor numerical value reads spring displacement amount from shift scale
It obtains to stress value and rate of penetration；Wherein, self-advancing type injection drilling propulsive force is equal to sensor readings plus spring force；
Pressure and flow during record parallel water pump；
B5: when inner cylinder completes a stroke, self-propelled drilling is completed, and rear end cap is opened, and takes out sample, observation, measurement
With record borehole data, the borehole data includes borehole wall state, bore diameter and rate of penetration.
B6: repeating above steps, and measurement obtains different confining pressure pressure floodages, different hardness system coal seam and difference
Test data under nozzle structure, the test data include propulsive force size.
Claims (10)
1. dynamic equilibrium self-propelled water jet borehole test device under a kind of confining pressure state, including confining pressure cabin (1), the confining pressure
Cabin (1) includes columnar shell (11) and the drive end bearing bracket (12) and rear end cap (13) for being covered in shell both ends；Its feature
It is, sealing perforation drive end bearing bracket (12) and the inner cylinder (4) that can move axially vertically is equipped on the drive end bearing bracket (12), positioned at encloses
Inner cylinder (4) end in ballasting (1) is equipped with high-pressure water jet spray head (5), in the end of confining pressure cabin (1) external inner cylinder (4)
High-pressure rubber pipe (6) are communicated with as connecting pin sealing；It is cased with outer cylinder (7) outside confining pressure cabin (1) external inner cylinder (4), outer cylinder (7)
One end sealing be fixed on drive end bearing bracket (12), movable sealing between the other end and inner cylinder (4) outer wall of outer cylinder (7)；
The test device further includes dynamic equilibrium balance weight mechanism (2) and dynamic equilibrium force measuring machine (3)；The dynamic equilibrium counterweight
Mechanism (2) includes the Pipeline clip (21) being fixed on the connecting pin, and cotton rope (22), cotton rope are connected on Pipeline clip (21)
(22) weights (24) are connected to around hanging after the fixed pulley (23) that is fixed on the drive end bearing bracket (12)；The dynamic equilibrium is surveyed
Force mechanisms (3) include covering the spring (31) on the high-pressure rubber pipe (6), and spring (31) is fixed on close to the one end of inner cylinder (4)
On high-pressure rubber pipe (6), the other end is vertically connected with slide plate (32), and the slide plate (32), which can be slidably mounted at, is parallel to high-pressure rubber pipe
(6) on sliding rail (33), the sliding rail (33) is vertically fixed in the first fixed plate (34) in the middle part of spring (31), and first
Fixed plate (34) is mounted below spring (31) and on the channel steel (35) being fixed on outer cylinder (7)；In the first fixed plate
(34) force snesor (36) are equipped between slide plate (32).
2. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In the both ends of the force snesor (36) are equipped with the briquetting (361) for being close to the first fixed plate (34) and slide plate (32)；
One end of the channel steel (35) is welded with the link block (351) for being close to outer cylinder (7) lower wall, link block (351) upper end
It is connected with the fastening block (352) covered on outer cylinder (7) upper wall, the fastening block (352) and link block (351) are tightly fastened and cover
On outer cylinder (7)；
It is parallel relatively and positioned at spring (31) there are two being bolted in the two side walls of the other end of the channel steel (35)
The side fixed plate (37) of two sides, the first fixed plate (34) described in vertical welding between two side fixed plates (37) are being close to the
The lower section of the briquetting (361) of one fixed plate (34) is equipped with the briquetting support plate (341) being fixed on the first fixed plate (34)；Tight
The lower section for pasting the briquetting (361) of slide plate (32) is equipped with the second fixed plate being vertically connected between two side fixed plates (37)
(38)；
There are two the sliding rails (33), and two sliding rails (33) run through first fixed plate (34), the second fixed plate (38) in parallel
It is fixed on the first fixed plate (34) with the end of slide plate (32), and sliding rail (33).
3. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as claimed in claim 2
In the side fixed plate (37) is rectangular configuration；
First fixed plate (34) is the convex shape structure that lower end is equipped with opening, and the top of the first fixed plate (34) is to be close to
Briquetting (361), the both ends of the lower part of the first fixed plate (34) are to the fixation sliding rail (33), the lower end of the first fixed plate (34)
Opening is passed through for spring (31) and high-pressure rubber pipe (6)；
The vertical cross-section of the briquetting support plate (341) is L-shaped structure, and the end of the transverse slat of briquetting support plate (341) is welded on
In first fixed plate (34), it is recessed that the riser upper end of briquetting support plate (341) is equipped with the arc being close to the cooperation of briquetting (361) lower wall
Slot；
Second fixed plate (38) is inverted U-shaped structure, and the opening of the lower end of the second fixed plate (38) is used for spring (31)
It is passed through with high-pressure rubber pipe (6)；The upper end of second fixed plate (38), which is equipped with, cooperates the arc groove being close to briquetting (361) lower wall；
The slide plate (32) is cross-shaped structure, and the top of slide plate (32) is for being close to the briquetting (361), a left side for slide plate (32)
Right both ends offer arc groove to facilitate high-pressure rubber pipe (6) to pass through to the lower part through sliding rail (33), slide plate (32).
4. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In equipped with anti-shock pressure meter (111), safety overflow valve (112), water filling gas vent (113) and use at the top of the shell (11)
In two hanging rings (114) for moving confining pressure cabin；The fixing support rack to fix and support coal sample is equipped in the confining pressure cabin (1)
(14), fixing support rack (14) is arranged close to rear end cap (13), is additionally provided in the confining pressure cabin (1) above fixing support rack (14)
Filter screen (15), boring mud sprays and blocks the safety overflow valve (112) when preventing high-pressure water jet from drilling；The front end
Lid (12) is equipped with and discharges water shut-off valve (121)；Shell (11) bottom is set there are two confining pressure cabin bracket (115).
5. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In airtight cavity being formed between the outer cylinder (7) inner wall and inner cylinder (4) outer wall, between the airtight cavity and confining pressure cabin (1)
Sealing is communicated with connection sebific duct (8), to keep hydraulic pressure and the intracorporal pressure balance of the closed chamber in confining pressure cabin (1), from
And the hydraulic pressure in confining pressure cabin (1) is offset to the thrust of inner cylinder (4).
6. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In the fixed pulley (23) is mounted on the drive end bearing bracket (12) by pulley yoke；Positioned at fixed pulley (23) and Pipeline clip (21)
Between cotton rope (22) and the central axes of inner cylinder (4) be parallel to each other.
7. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In rear end cap (13) the removable seal lid is closed in shell (11) end, and two are equipped on the side wall of the rear end cap (13)
A first pinboard (131), set on the side wall of shell (11) end for being close to rear end cap (13) there are two respectively with two the
The second pinboard (116) that one pinboard (131) is close in parallel, first pinboard (131) and the second pinboard (116) it
Between by bolt it is hinged, to along bolt Unscrew rear end cap (13)；
The rear end cap (13) is equipped with the handle (132) to pull rear end cap (13)；
The edge of the rear end cap (13) is equipped with to be close to rear end cap (13) sealing to be fixed on shell (11) end for one week
Bolt.
8. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In the lateral wall of the channel steel (35) is equipped with the shift scale (353) to measure spring (31) elongation.
9. dynamic equilibrium self-propelled water jet borehole test device, feature exist under confining pressure state as described in claim 1
In the inner cylinder (4), outer cylinder (7) and shell (11) coaxial arrangement are equipped with sealing between the inner cylinder (4) and outer cylinder (7)
Part, the sealing element are that resistance is small and the sealing element of sealed reliable；
The inner cylinder (4) is 500mm along outer cylinder (7) mobile stroke；
The outer cylinder (7) is fixed on drive end bearing bracket (12) by flange, and carries out end face seal.
10. a kind of dynamic equilibrium self-propelled water jet borehole test method under confining pressure state, which is characterized in that wanted using right
Dynamic equilibrium self-propelled water jet borehole test device under confining pressure state described in 1 to 9 any claim is asked to be tested,
Specifically includes the following steps:
(A) counterweight test the following steps are included:
A1: after filling cabin water from the water filling gas vent on confining pressure cabin, water filling gas vent is blocked；
A2: water pump is connected on high-pressure rubber pipe, high-pressure water jet spray head starts water spray to confining pressure cabin and reaches requirement confining pressure, by anti-
Shake pressure gauge reading；
A3: it under the confining pressure, by adjusting the counterweight after weights record inner cylinder uniform motion, obtains matching needed for the confining pressure
Weight；
A4: safety overflow valve, the counterweight of weights needed for recording different confining pressures are adjusted；
(B) testing procedure:
B1: the shut-off valve that discharges water, the residual water in rapid blow-down confining pressure cabin are opened, and inner cylinder is pulled to close to drive end bearing bracket；
B2: rear end cap is opened, coal sample and fixation are put into confining pressure cabin, be spirally connected rear end cap；
B3: safety overflow valve pressure is set up, corresponding weights under the test group confining pressure are configured；
B4: open water pump start high-pressure injection drilling, record force snesor numerical value, from shift scale read spring displacement measure to
To stress value and rate of penetration；Wherein, self-advancing type injection drilling propulsive force is equal to sensor readings plus spring force；Record
Pressure and flow during parallel water pump；
B5: when inner cylinder completes a stroke, self-propelled drilling is completed, and rear end cap is opened, and takes out sample, observation, measurement and note
Record borehole data.
B6: repeating above steps, and measurement obtains different confining pressure pressure floodages, different hardness system coal seam and different spray heads
Test data under structure.
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| CN201811485186.9A CN109667541B (en) | 2018-12-06 | 2018-12-06 | Dynamic balance self-propelled water jet drilling testing device and method under confining pressure state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927485A (en) * | 2020-07-13 | 2022-01-14 | 中国石油天然气股份有限公司 | Abrasive water jet forging and milling casing pipe experimental device |
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