CN107524440A - A kind of repeat formation tester (RFT) and its probe assembly - Google Patents
A kind of repeat formation tester (RFT) and its probe assembly Download PDFInfo
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- CN107524440A CN107524440A CN201610446220.6A CN201610446220A CN107524440A CN 107524440 A CN107524440 A CN 107524440A CN 201610446220 A CN201610446220 A CN 201610446220A CN 107524440 A CN107524440 A CN 107524440A
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- 239000000523 sample Substances 0.000 title claims abstract description 129
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 47
- 239000007787 solid Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 description 87
- 239000010720 hydraulic oil Substances 0.000 description 16
- 230000033001 locomotion Effects 0.000 description 13
- 239000007788 liquid Substances 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 8
- 238000005070 sampling Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/081—Obtaining fluid samples or testing fluids, in boreholes or wells with down-hole means for trapping a fluid sample
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of repeat formation tester (RFT) and its probe assembly, pipeline road is simplified, reduces fault rate, improves logging efficiency.To solve above-mentioned technical problem, the present invention provides a kind of probe assembly of repeat formation tester (RFT), including body, probe, first piston cylinder and the second piston cylinder being connected on the body, the second piston cylinder is used to drive the first piston cylinder closer or far from stratum, the probe set is in the piston rod of the first piston cylinder and can run through the first piston cylinder and stretch into stratum, the piston rod of the second piston cylinder has the first oil circuit connected with its rodless cavity, and the second oil circuit connected with its rod chamber, first oil circuit connects with the rod chamber of the first piston cylinder, second oil circuit connects with the rodless cavity of the first piston cylinder.
Description
Technical field
The present invention relates to logging equipment technical field, more particularly to a kind of repeat formation tester (RFT)
And its probe assembly.
Background technology
Repeat formation tester (RFT) is used to directly obtain oil gas formation fluid sample in Oil/gas Well, analysis
Oil-gas Layer pressure system and calculating oil-gas Layer permeability.Strata pressure for several times can be carried out by once going into the well
Test, the pressure traverse established out all have important in geology, drilling engineering and petroleum production engineering
Meaning.
Wherein, probe assembly is the core of repeat formation tester (RFT).During well logging, pass through hydraulic pressure
Stratum is hedged off from the outer world by driving probe assembly to stratum backup, and by packer；Now,
Under suction function, formation sample enters the body of repeat formation tester (RFT) via probe assembly,
Complete sampling.
Fig. 1 is refer to, Fig. 1 is a kind of structural representation of typical probe assembly in the prior art
Figure.
As shown in figure 1, probe assembly of the prior art is equipped with side rail 100 in upper and lower ends,
It is fixedly connected respectively with probe upper body 110 and lower probe body 120 by side rail 100；
Probe assembly includes two big piston cylinder 130 and two valve piston cylinders 140, two big piston cylinders 130
Upper and lower ends in left side, two valve piston cylinders 140 are in the upper and lower ends on right side, when big living
, being capable of backup probe assembly when piston rod in plug cylinder 130 and valve piston cylinder 140 is protruding
Recline stratum, on the contrary, when the piston rod in big piston cylinder 130 and valve piston cylinder 140 inwardly returns
During contracting, probe assembly can be driven to bounce back.
Probe assembly also includes piston cylinder 150 and lower cylinder body 160, and both cooperate, and realizes
Probe 170 stretches, and then realizes the absorption of sample liquid.It is existing to realize the flexible of probe 170
There is the probe assembly in technology also to include spiral oil pipe 180 and sequence valve.Spiral oil pipe 180 is logical
Standing to be set to four, two of which, which is matched somebody with somebody, to be connected on piston cylinder 150, the oil-feed with piston cylinder 150
Mouthful connected with oil return opening, for driving lower cylinder body 160 to stretch, to drive probe 170 to recline or
Person is away from stratum；Two other, which is matched somebody with somebody, is connected on lower cylinder body 160, the oil inlet with lower cylinder body 160
Connected with oil return opening, for driving the probe 170 in lower cylinder body 160 to move so that probe 170
Sample liquid is drawn away from the filter cylinder on lower cylinder body 160, or driving probe 170 is stretched into filter cylinder.
Sequence valve is used to control probe 170 to bounce back after probe assembly reclines stratum.Specifically, it is suitable
Sequence valve is set on probe upper body 110 or lower probe body 120, and with being connected on piston
One of spiral oil pipe 180 on cylinder 150 and with one of them being connected on lower cylinder body 160
Spiral oil pipe 180 connects, and with the break-make order of two spiral oil pipes 180 of control, and then controls
The sequencing that lower cylinder body 160 moves with probe 170, to drive probe in lower cylinder body 160
170 recline behind stratum, control probe 170 to bounce back and draw sample liquid again, are ensureing probe 170 just
Often work.
Following technical problem be present in above-mentioned existing probe assembly：
In four spiral oil pipes 180, there are two with being connected on piston cylinder 150, two other is matched somebody with somebody
It is connected on lower cylinder body 160, in backup and retraction process, piston cylinder 150 and lower cylinder body 160
Can move, then four spiral oil pipes 180 be connected with piston cylinder 150 and lower cylinder body 160 one
End can follow probe 170 to move；But due to each spiral oil pipe 180 wherein one end with
Hydraulic pump connects, and hydraulic pump is fixedly connected on probe upper body 110 or lower probe body
On 120, i.e., each spiral oil pipe 180 is respectively provided with a fixing end；In the backup of probe assembly and return
During contracting, it will stretch or compress spiral oil pipe 180, or even cause in use
Spiral oil pipe 180 is broken and oil leak.
In addition, the spacing between hydraulic pump and piston cylinder 150 and lower cylinder body 160 is larger, thus it is defeated
The number of turns of spiral oil pipe 180 is more used by oil, pipeline length, now, the impurity in hydraulic oil
Spiral oil pipe 180 is easily caused to block.
In view of this, it would be highly desirable to for above-mentioned technical problem, optimization design repetition of the prior art
Formula formation tester and its probe assembly, to simplify pipeline road, fault rate is reduced, improves and surveys
Well efficiency.
The content of the invention
The purpose of the present invention simplifies to provide a kind of repeat formation tester (RFT) and its probe assembly
Pipeline road, reduces fault rate, improves logging efficiency.
In order to solve the above technical problems, the present invention provides a kind of probe of repeat formation tester (RFT)
Assembly, including body, probe, first piston cylinder and the second piston being connected on the body
Cylinder, the second piston cylinder is used to drive the first piston cylinder closer or far from stratum, described
Probe set in the piston rod of the first piston cylinder and can through the first piston cylinder and
Stratum is stretched into, the piston rod of the second piston cylinder has the first oil circuit connected with its rodless cavity,
And the second oil circuit connected with its rod chamber, first oil circuit and the first piston cylinder
Rod chamber connects, and second oil circuit connects with the rodless cavity of the first piston cylinder.
The probe assembly of the present invention, second piston cylinder is connected on body, is then lived second
First oil circuit and the second oil circuit are set on the piston rod of plug cylinder, lived so as to which hydraulic oil is introduced into first
Plug cylinder, and then drive probe close or away from stratum by hydraulic oil, to realize the suction of sample
Take.Due to the present invention by the piston rod of second piston cylinder set oil circuit be first piston cylinder
Fuel feeding, avoid and be separately provided pipeline road for first piston cylinder, so as to simplify pipeline road；
What is more important, due to the piston rod driving first piston cylinder motion of second piston cylinder, then the
The piston rod of two piston cylinders moves with first piston cylinder, equivalent to a shifting of first piston cylinder
Dynamic oil sources, provides hydraulic oil, then between second piston cylinder and first piston cylinder for first piston cylinder
Pipeline road can also distinguish with the both ends of pipeline road in the prior art with moving together
Compared with body connects with first piston cylinder, will not be stretched because of the motion of first piston cylinder or
Pipeline road is compressed, ensure that the reliability of oil circuit, is avoided because pipeline road fracture causes oil leak；
Moreover, equivalent to one mobile oil sources of the piston rod of second piston cylinder, with passing through body fuel feeding phase
Than, it can significantly shorten the length of pipeline road, pipeline road, which is not present, in addition stretches and compresses,
Oil circuit blocking is avoided, and then ensures the reliability of driving.
Alternatively, the 3rd piston cylinder of the piston rod in addition to as the first piston cylinder, institute
Piston rod of the probe as the 3rd piston cylinder is stated, and towards the first piston cylinder without bar
Chamber extends, to stretch into stratum through the 3rd piston cylinder and the first piston cylinder；It is described
Two oil pockets of the 3rd piston cylinder can connect to the corresponding oil pocket of the first piston cylinder.
Alternatively, in addition to the control valve that is integrated on the 3rd piston cylinder, the control valve
The first hydraulic fluid port connected with the rodless cavity of the 3rd piston cylinder, the second hydraulic fluid port with described first live
The rodless cavity connection of plug cylinder；During in backup working position, the rod chamber of the first piston cylinder
Oil pressure rises to predetermined value and connects first hydraulic fluid port and second hydraulic fluid port；In retraction work
When making position, second hydraulic fluid port to the first hydraulic fluid port unilaterally connected.
Alternatively, the control valve includes overflow valve and check valve, and the overflow valve has and institute
State the control port of the rod chamber connection of first piston cylinder, and with first hydraulic fluid port and described
Two actuator ports of the second hydraulic fluid port connection；The check valve is used for second hydraulic fluid port to institute
State the first hydraulic fluid port unilaterally connected.
Alternatively, in addition to cartridge filter, the cartridge filter are arranged on the cylinder of the 3rd piston cylinder
Cylinder bottom, and extended in the same direction with the probe；The cylinder barrel bottom of the first piston cylinder, which is provided with, to be supplied
The cartridge filter is passed and is tightly connected into the through hole on stratum, the cartridge filter with the through hole；
The pinhead sleeve of the probe is in the cartridge filter.
Alternatively, the cylinder barrel bottom surface of the first piston cylinder is provided with seal, the sealing ring
The circumference of the cartridge filter is wound on, so as to which the cartridge filter and the through hole are tightly connected, and
By the cartridge seal in stratum.
Alternatively, in addition to the first spiral oil pipe and the second spiral oil pipe, first spiral are oily
The both ends of the pipe rod chamber with the first piston cylinder and first oil communication respectively；It is described
The both ends of second spiral the oil pipe rodless cavity with the first piston cylinder and second oil circuit respectively
Connection.
Alternatively, including two second piston cylinders, the piston rod of the two second piston cylinders
The radially opposite sides of the first piston cylinder are respectively supported at, and along the axle of the first piston cylinder
To extension.
Alternatively, in addition to two the 4th piston cylinders on the body of being connected, the described 4th
The piston rod of piston cylinder extends towards the direction opposite with the piston rod of the second piston cylinder, with
It is respectively supported at the relative borehole wall.
The present invention also provides a kind of repeat formation tester (RFT), including the spy described in any of the above-described
Pin assembly.
Because the probe that the repeat formation tester (RFT) of the present invention is included described in any of the above-described is total
Into, therefore technique effect caused by any of the above-described probe assembly is applied to the repetition of the present invention
Formula formation tester, here is omitted.
Brief description of the drawings
Fig. 1 is a kind of structural representation of typical probe assembly in the prior art；
Fig. 2 is the probe assembly of repeat formation tester (RFT) provided by the present invention a kind of specific real
Apply the structural representation in mode；
Fig. 3 is the view that probe assembly shown in Fig. 2 is in backup working position；
Fig. 4 is the hydraulic diagram that probe assembly shown in Fig. 2 is in backup working position；
Fig. 5 is the view that probe assembly shown in Fig. 2 is in retraction working position；
Fig. 6 is the hydraulic diagram that probe assembly shown in Fig. 2 is in retraction working position；
Fig. 7 is that the well logging state of the probe assembly of repeat formation tester (RFT) provided by the present invention is shown
It is intended to.
In Fig. 1：
Side rail 100, probe upper body 110, lower probe body 120, big piston cylinder 130,
Valve piston cylinder 140, piston cylinder 150, lower cylinder body 160, probe 170, spiral oil pipe 180；
In Fig. 2-7：
Body 1, probe 2, first piston cylinder 3, second piston cylinder 4, the first oil circuit 41,
Two oil circuits 42, the 3rd piston cylinder 5, control valve 6, cartridge filter 7, seal 8, the first spiral
Oil pipe 91, the second spiral oil pipe 92, the 4th piston cylinder 10.
Embodiment
The core of the present invention simplifies to provide a kind of repeat formation tester (RFT) and its probe assembly
Pipeline road, reduces fault rate, improves logging efficiency.
In order that those skilled in the art more fully understands technical scheme, tie below
Closing the drawings and specific embodiments, the present invention is described in further detail.
First, second grade word as described herein is for the same or similar multiple portions of specification configuration
Part, certain particular determination to order is not indicated that.In the case of without specified otherwise, this paper institutes
The upper and lower use state using repeat formation tester (RFT) stated is reference, when repetitive formation testing
When device is in use state, under the direction close to the earth's crust is, the direction away from the earth's crust is upper.This
The bottom of text each cylinder barrel be using piston cylinder be with reference to definition, during piston cylinder use state,
Piston is with its bottom surface face rodless cavity, and one side of the rodless cavity away from piston is the bottom surface of cylinder barrel, cylinder
Part where the bottom surface of cylinder forms the bottom of the cylinder barrel of piston cylinder.
Fig. 2 is refer to, the invention provides a kind of probe assembly of repeat formation tester (RFT),
Including body 1 and the probe assembly being connected with body 1, the body 1 forms probe assembly
Basis, it can specifically include upper and lower two parts, as stated in the Background Art, body 1 is with repeating
The other parts of formula formation tester are fixedly connected；Probe assembly can include probe 2, first
Piston cylinder 3 and second piston cylinder 4, wherein, second piston cylinder 4 is fixedly connected on body 1,
And be connected with first piston cylinder 3, for driving first piston cylinder 3 to move, lived with backup first
Plug cylinder 3 is close to stratum or drives first piston cylinder 3 to bounce back and remote stratum；Probe 2 is set with
In first piston cylinder 3, with first piston cylinder 3 close to or away from stratum, moreover, visiting
Pin 2 can also be relative to first piston cylinder 3 under the driving of hydraulic coupling cylinder barrel move, and can
Stretched into through first piston cylinder 3 in stratum, and then the pipette samples from stratum, complete sampling.
Specifically, in probe assembly of the invention, the piston rod of second piston cylinder 4 can define
For second piston bar, oil circuit can be built-in with the second piston bar, is specifically as follows including
One oil circuit 41 and the second oil circuit 42, the first oil circuit 41 connect with the rodless cavity of second piston cylinder 4,
Second oil circuit 42 connects with the rod chamber of second piston cylinder 4；Wherein, the first oil circuit 41 can be with
Connected with the rod chamber of first piston cylinder 3, the second oil circuit 42 can be with the nothing of first piston cylinder 3
Rod cavity connects.Now, can be by the hydraulic oil in second piston cylinder 4 by second piston bar
Introduce in first piston cylinder 3, that is to say, that by second piston bar, by second piston cylinder 4
Interior fluid is fed directly to first piston cylinder 3 so that second piston cylinder 4 becomes the first work
The oil sources of plug cylinder 3.
Using said structure, pipeline road is set between second piston bar and first piston cylinder 3
The fuel feeding of first piston cylinder 3 can be achieved, without drawing pipeline road from body 1 to the
One piston cylinder 3.Compared with body 1, second piston bar can move with first piston cylinder 3
(i.e. second piston bar driving first piston cylinder 3 moves), it is connected to second piston bar and is lived with first
Pipeline road between plug cylinder 3 can also move with both motions, i.e. the two of pipeline road
End is mobile terminal；Now, it would not stretch or compress because of the motion of first piston cylinder 3
Pipeline road, the service life of pipeline road is extended, avoid pipeline road because bearing repeatedly
Pressure and rupture.It is additionally, since pipeline road and can be arranged directly on first piston cylinder 3
Between second piston bar, with being arranged in the prior art between body 1 and first piston cylinder 3
Pipeline road compare, the present invention effectively shortens the length of pipeline road, simplifies petroleum pipeline
Road, and then the blocked possibility of pipeline road is reduced, so as to improve the reliability of oil transportation,
Ensure that backup and the action of retraction may be carried out.
, can be the to realize the connection of the first oil circuit 41 and the rod chamber of first piston cylinder 3
The oil-out connection petroleum pipeline of first oil circuit 41 on two piston rods, then by the other end of petroleum pipeline
Connected with the rod chamber of first piston cylinder 3.Or can be on the cylinder barrel of first piston cylinder 3
Extension is set, and the extension can extend to second piston cylinder 4, and can be with second piston
Bar connects, then can in extension built-in oil circuit, the built-in oil circuit and second piston cylinder 4
First oil circuit 41 connects, while can also be connected with the rod chamber of first piston cylinder 3, and then will
First oil circuit 41 connects with the rod chamber of first piston cylinder 3.
Similarly, can also use petroleum pipeline by the second oil circuit 42 with first piston cylinder 3 without bar
Chamber connects, or can use above-mentioned extension, sets oil built in one in addition in extension
Road, to realize the connection of the second oil circuit 42 and the rodless cavity of first piston cylinder 3.
To realize the driving of probe 2, the present invention can also include the 3rd piston cylinder 5, probe 2
It can specifically be sleeved in the 3rd piston cylinder 5, as the piston rod of the 3rd piston cylinder 5, now
The 3rd piston cylinder 5 can be as the piston rod of first piston cylinder 3.Specifically, first live
The cylinder barrel bottom of plug cylinder 3 can be towards stratum, i.e., with cylinder when first piston cylinder 3 is in well
The bottom of cylinder is towards the borehole wall, piston rod of the 3rd piston cylinder 5 as first piston cylinder 3, direction
The direction of cylinder barrel away from first piston cylinder 3 extends, i.e., remote stratum, in other words the 3rd piston
Piston of the cylinder 5 using the bottom surface of its cylinder barrel as first piston cylinder 3；Probe 2 is used as the 3rd piston
The piston rod of cylinder 5, first piston cylinder 3 and the 3rd piston cylinder 5 are pointed to the syringe needle of probe 2
Cylinder barrel bottom, i.e. probe 2 extend towards the rodless cavity of first piston cylinder 3, and are lived through the 3rd
Plug cylinder 5 and first piston cylinder 3 and stretch into stratum, so as to draw sample liquid from stratum.
Now, in order to which hydraulic oil is introduced into the 3rd piston cylinder 5, visited with will pass through hydraulic oil driving
Pin 2 moves, corresponding oil that can be by two oil pockets of first piston cylinder 3 to the 3rd piston cylinder 5
Chamber connects, you can so that the rodless cavity of the rodless cavity of first piston cylinder 3 and the 3rd piston cylinder 5 to be connected
It is logical, the rod chamber of first piston cylinder 3 is connected with the rod chamber of the 3rd piston cylinder 5.Can be with
By connecting for the component controls first piston such as control valve 6 cylinder 3 and the 3rd piston cylinder 5, or
Control to the 3rd piston cylinder 5 introduce fluid by time, so as to probe 2 reach stratum after again
The driving to probe 2 is carried out, and then realizes sampling.
In a kind of embodiment, can on the 3rd piston cylinder 5 integrated control valve 6,
Control valve 6 can have two hydraulic fluid ports, respectively the first hydraulic fluid port and the second hydraulic fluid port, the first hydraulic fluid port
Connected with the rodless cavity of the 3rd piston cylinder 5, the rodless cavity of the second hydraulic fluid port and first piston cylinder 3 connects
It is logical.When in backup working position, can using the oil pressure of the rod chamber of first piston cylinder 3 as
Voltage input, when the oil pressure of the rod chamber of first piston cylinder 3 rises to predetermined value, connection first
Hydraulic fluid port and the second hydraulic fluid port；When first hydraulic fluid port and the second hydraulic fluid port connect so that the 3rd piston cylinder 5
Rodless cavity connects with the rodless cavity of first piston cylinder 3, because now first piston cylinder 3 is without bar
Chamber connects with fuel tank, then the rodless cavity of the 3rd piston cylinder 5 connects with fuel tank so that the 3rd piston
The rodless cavity of cylinder 5 can smooth emptying, the hydraulic oil of the rod chamber of first piston cylinder 3 can be suitable
Profit enters the rod chamber of the 3rd piston cylinder 5, to drive probe 2 to be moved with respect to the 3rd piston cylinder 5.
During in retraction working position, the second hydraulic fluid port to the first hydraulic fluid port unilaterally connected first can then be lived
The hydraulic oil of the rodless cavity of plug cylinder 3 can unidirectionally flow into the rodless cavity of the 3rd piston cylinder 5, so as to
Probe 2 is pushed to the cylinder barrel bottom of the 3rd piston cylinder 5, and driven by the 3rd piston cylinder 5
Probe 2 bounces back.
In detail, the structure type of control valve 6 is unlimited, and control valve 6 is specifically as follows combination valve,
When control valve 6 is combination valve, overflow valve and check valve can be included.Wherein, overflow valve can
With with control port and two actuator ports, control port and the rod chamber of first piston cylinder 3
Connection, two actuator ports connect with above-mentioned first hydraulic fluid port and the second hydraulic fluid port respectively, so as to the
The oil pressure of the rod chamber of one piston cylinder 3 controls the first hydraulic fluid port and the second hydraulic fluid port when rising to predetermined value
Connection.Check valve can be arranged on the connection oil circuit of the first hydraulic fluid port and the second hydraulic fluid port, and is being returned
By the second hydraulic fluid port to the first hydraulic fluid port unilaterally connected during contracting working position.
It will be understood by those skilled in the art that the structure type of control valve 6 is various, it is unlimited
In combinations thereof valve, combinations thereof form is also not necessarily limited to.For example, above-mentioned control valve 6 can be with
For the threeway with least two working positions or four-way valve, to be realized by the switching of working position
State function；Or can be pilot-operated type valve, and guide's hydraulic fluid port and first piston cylinder 3 are had into bar
Chamber connects, to pass through the hydraulic fluid port of oil pressure cntrol first of the rod chamber of first piston cylinder 3 and the second oil
The connection situation of mouth.
Below in conjunction with Fig. 3-6, backup and retraction process to the probe assembly of the present invention are carried out
Describe in detail.
As shown in Figure 3 and Figure 4, using above-mentioned probe assembly, form can specifically realize as follows
The backup of probe assembly.
It is possible, firstly, to pass through the nothing that the hydraulic power sources such as the hydraulic pump on body 1 are second piston cylinder 4
Rod cavity provides high pressure fuel source, and first piston cylinder 3 is driven towards close to stratum by second piston bar
Direction motion；Meanwhile by the first oil circuit 41 in second piston bar, hydraulic oil is introduced
The rod chamber of first piston cylinder 3, drive rodless cavity of the 3rd piston cylinder 5 to first piston cylinder 3
Motion, and then cause the 3rd piston cylinder 5 as first piston cylinder 3 reclines stratum together；Now,
Fluid in the rod chamber of first piston cylinder 3 constantly raises, but without obtaining the predetermined value,
So when the 3rd piston cylinder 5 rodless cavity do not connected with mailbox, the 3rd piston cylinder 5 has bar
Chamber also just can not oil-feed, the relative position of probe 2 and the 3rd piston cylinder 5 keeps constant, that is, visits
Pin 2 is synchronized with the movement with the 3rd piston cylinder 5.When the cylinder barrel of first piston cylinder 3 is adjacent to stratum,
3rd piston cylinder 5 has been in the cylinder barrel bottom of first piston cylinder 3, and probe 2 is lived with the 3rd
Plug cylinder 5 is moved and stretched into stratum, as shown in Figure 7；Now, first piston cylinder 3 without bar
The oil pressure of chamber reaches the predetermined value, and control valve 6 controls the first hydraulic fluid port and the connection of the second hydraulic fluid port,
And then the rodless cavity of the 3rd piston cylinder 5 is connected with the rodless cavity of first piston cylinder 3 so that the
The rod chamber of three piston cylinders 5 starts oil-feed, promotes the probe 2 for coming into stratum to bounce back, with
Produce negative pressure and sample liquid is sucked from stratum.In whole action process, each part can be according to figure
Direction motion in 3 and Fig. 4 shown in hollow arrow.It can be seen that by above-mentioned backup process, can
To realize sampling.
As shown in Figure 5 and Figure 6, can be to second piston cylinder 4 when in retraction working position
Rod chamber input hydraulic oil, drive first piston cylinder 3 to bounce back will pass through second piston bar,
So that first piston cylinder 3 is directed away from the direction motion on stratum.Because second piston bar passes through
Two oil circuits 42 input hydraulic oil the rodless cavity of first piston cylinder 3, and control valve 6 is lived first again
The rodless cavity of plug cylinder 3 connects with the rodless cavity of the 3rd piston cylinder 5, then hydraulic oil flows into the simultaneously
The rodless cavity of one piston cylinder 3 and the rodless cavity of the 3rd piston cylinder 5；3rd piston cylinder 5 without bar
Chamber oil-feed, driving probe 2 stretch out, and probe 2 stops drawing sample liquid and moves to the 3rd piston cylinder
5 cylinder barrel bottom, is abutted with the cylinder barrel bottom of the 3rd piston cylinder 5, finally with the 3rd piston cylinder 5
Geo-stationary, as shown in Figure 6；Meanwhile the rodless cavity oil-feed of first piston cylinder 3, driving the
Three piston cylinders 5 are directed away from the direction motion on stratum, then the 3rd piston cylinder 5 drives probe 2 to transport
It is dynamic, finally cause first piston cylinder 3, the 3rd piston cylinder 5 and probe 2 away from stratum,
Realize the retraction of whole probe assembly.In whole action process, each part can be according to Fig. 5
With the direction motion in Fig. 6 shown in hollow arrow.
, can be according to shown in Fig. 7, by repetitive when being sampled please further combined with Fig. 7
Formation tester is stretched into well, then performs backup and retracting action according to above-mentioned steps；When
When needing to sample again, above-mentioned backup action and retracting action can be repeated, that is to say, that
Those skilled in the art can carry out more sub-samplings as needed.
In addition, as seen in figures 3-6, probe assembly of the invention can also include cartridge filter 7,
Cartridge filter 7 can be arranged on the cylinder barrel bottom of the 3rd piston cylinder 5, specifically can be in the 3rd piston
The cylinder barrel bottom surface of cylinder 5 extends to form tube-in-tube structure towards the rodless cavity of first piston cylinder 3, and can
To set screen pack etc. in the bottom of the tube-in-tube structure (i.e. the direction away from the 3rd piston cylinder 5)
Part, to form whole cartridge filter 7.It can be seen that cartridge filter 7 and the probe 2 in the application
Extend in the same direction.Through hole, the cartridge filter 7 can be provided with the cylinder barrel bottom of first piston cylinder 3
Through hole can be passed and entered in stratum, be tightly connected between the cartridge filter 7 and the through hole；
The pinhead sleeve of probe 2 can also be mounted in the cartridge filter 7, probe 2 can be relatively described
Cartridge filter 7 the 3rd piston cylinder 5 axial movement, so as to by its syringe needle stretch into stratum or by
Retracted in stratum, then equivalent to one sampler of syringe needle, passes through negative pressure absorbing sample liquid.Now,
Sample liquid in stratum can first pass around the filtering of cartridge filter 7, then enter back into probe 2,
And then reduce the percentage of impurity for sampling liquid；Moreover, cartridge filter 7 can also play branch to probe 2
Support and guide effect, to improve the motion credibility of probe 2, and then improve sampling efficiency.
Can also be specific in the cylinder barrel bottom surface of first piston cylinder 3 setting seal 8, seal 8
The circumference of cartridge filter 7 can be looped around, so that the through hole by cartridge filter 7 and first piston cylinder 3
Sealing connects；Meanwhile when first piston cylinder 3 reclines stratum, the sealing of seal 8 is pressed on the
Between the cylinder barrel of one piston cylinder 3 and stratum, and then cartridge filter 7 is sealed in stratum, with shape
Into confined space, then when probe 2 bounces back, can produces negative pressure, and then is drawn from stratum
Sample liquid, it refer to Fig. 4.
On the basis of the above, as described above, the first oil circuit can be realized using petroleum pipeline herein
41 with the connection of first piston cylinder 3, can also use petroleum pipeline with realize the second oil circuit 42 and
The connection of first piston cylinder 3.Specifically, as illustrated in figs. 2-7, the petroleum pipeline can be spiral shell
Oil pipe is revolved, now, the present invention can also include the first spiral oil pipe 91 and the second spiral oil pipe
92；The both ends of first spiral oil pipe 91 can respectively with the first oil circuit 41 and first piston cylinder 3
Rod chamber connection, the both ends of the second spiral oil pipe 92 can respectively with the second oil circuit 42 and the
The rodless cavity connection of one piston cylinder 3, and then hydraulic oil is introduced into first piston cylinder 3 so that the
One piston cylinder 3 and second piston cylinder 4 share an oil circuit.
Meanwhile to realize the steady driving to first piston cylinder 3, the present invention can set two
The second piston cylinder 4.Now, the first oil circuit 41 and the second oil circuit 42 can be arranged on
On one of piston rod of second piston cylinder 4, two second pistons can also be separately positioned on
On the piston rod of cylinder 4, those skilled in the art can select the first oil circuit 41 and as needed
The set location of two oil circuits 42.The piston rod of two second piston cylinders 4 can be respectively supported at
The both sides of one piston cylinder 3, specifically may be at the radially opposite sides of first piston cylinder 3, can be with
Along the axially extending of first piston cylinder 3, to improve the driving reliability to first piston cylinder 3.
It is also possible to including two the 4th piston cylinders 10, two the 4th piston cylinders 10
It can also be fixedly connected on body 1, moreover, the piston cylinder of two the 4th piston cylinders 10 can be with
It is oppositely arranged with the piston cylinder of second piston cylinder 4, i.e. the piston rod of the 4th piston cylinder 10 towards with
The direction that the piston rod of second piston cylinder 4 is opposite extends, then when second piston cylinder 4 and the 4th is lived
When the piston rod of plug cylinder 10 stretches out, the borehole wall relative in well can be supported on, so that will be whole
Individual probe assembly support is fixed, as shown in fig. 7, so that follow-up sampling is smoothed out.
It should be noted that for ease of clearly illustrating the flowing of hydraulic oil, Fig. 4 and Fig. 6 give
In the hydraulic schematic diagram gone out, filled black part in each piston cylinder represents hydraulic oil, in the
The filled black part of the cylinder barrel bottom of one piston cylinder 3 represents seal 8.
The present invention still further provides a kind of repeat formation tester (RFT), using above-mentioned probe
Assembly.By the part that repeat formation tester (RFT) is included is larger, the structure of each part is more
Complexity, prior art is specifically refer to, here is omitted.
A kind of repeat formation tester (RFT) provided by the present invention and its probe assembly are entered above
Go and be discussed in detail.Specific case used herein is entered to the principle and embodiment of the present invention
Elaboration is gone, the explanation of above example is only intended to help the method and its core that understand the present invention
Thought is thought.It should be pointed out that for those skilled in the art, do not departing from
On the premise of the principle of the invention, some improvement and modification can also be carried out to the present invention, these change
Enter and modify to also fall into the protection domain of the claims in the present invention.
Claims (10)
1. a kind of probe assembly of repeat formation tester (RFT), including body (1), probe (2),
First piston cylinder (3) and the second piston cylinder (4) being connected on the body (1), it is described
Second piston cylinder (4) is used to drive the first piston cylinder (3) closer or far from stratum, institute
Probe (2) is stated to be sleeved in the piston rod of the first piston cylinder (3) and can run through described
First piston cylinder (3) and stretch into stratum, it is characterised in that
The piston rod of the second piston cylinder (4) has the first oil circuit connected with its rodless cavity
(41) the second oil circuit (42), and with its rod chamber connected, first oil circuit (41)
Connected with the rod chamber of the first piston cylinder (3), second oil circuit (42) and described the
The rodless cavity connection of one piston cylinder (3).
2. probe assembly as claimed in claim 1, it is characterised in that also include being used as institute
State the 3rd piston cylinder (5) of the piston rod of first piston cylinder (3), probe (2) conduct
The piston rod of 3rd piston cylinder (5), and towards the first piston cylinder (3) without bar
Chamber extends, to be stretched into through the 3rd piston cylinder (5) and the first piston cylinder (3)
Stratum；Two oil pockets of the 3rd piston cylinder (5) can be with the first piston cylinder (3)
Corresponding oil pocket connection.
3. probe assembly as claimed in claim 2, it is characterised in that also include being integrated in
Control valve (6) on 3rd piston cylinder (5), the first hydraulic fluid port of the control valve (6)
Connected with the rodless cavity of the 3rd piston cylinder (5), the second hydraulic fluid port and the first piston cylinder (3)
Rodless cavity connection；During in backup working position, the rod chamber of the first piston cylinder (3)
Oil pressure rises to predetermined value and connects first hydraulic fluid port and second hydraulic fluid port；In retraction work
When making position, second hydraulic fluid port to the first hydraulic fluid port unilaterally connected.
4. probe assembly as claimed in claim 3, it is characterised in that the control valve (6)
Including overflow valve and check valve, the overflow valve has and has bar with the first piston cylinder (3)
The control port of chamber connection, and two connected with first hydraulic fluid port and second hydraulic fluid port
Actuator port；The check valve is used for second hydraulic fluid port to the first hydraulic fluid port unilaterally connected.
5. probe assembly as claimed in claim 2, it is characterised in that also including cartridge filter
(7), the cartridge filter (7) is arranged on the cylinder barrel bottom of the 3rd piston cylinder (5), and
Extended in the same direction with the probe (2)；The cylinder barrel bottom of the first piston cylinder (3), which is provided with, to be supplied
The cartridge filter (7) passes and led into the through hole on stratum, the cartridge filter (7) with described
Hole is tightly connected；The pinhead sleeve of the probe (2) is in the cartridge filter (7).
6. probe assembly as claimed in claim 5, it is characterised in that the first piston
The cylinder barrel bottom surface of cylinder (3) is provided with seal (8), and the seal (8) is looped around the mistake
The circumference of filter cylinder (7), so as to which the cartridge filter (7) and the through hole are tightly connected, and
The cartridge filter (7) is sealed in stratum.
7. the probe assembly as described in claim any one of 1-6, it is characterised in that also include
First spiral oil pipe (91) and the second spiral oil pipe (92), the first spiral oil pipe (91)
Both ends respectively with the rod chamber and first oil circuit (41) of the first piston cylinder (3) even
It is logical；The both ends of the second spiral oil pipe (92) nothing with the first piston cylinder (3) respectively
Rod cavity connects with second oil circuit (42).
8. probe assembly as claimed in claim 7, it is characterised in that including described in two
Second piston cylinder (4), the piston rod of the two second piston cylinders (4) are respectively supported at described
The radially opposite sides of one piston cylinder (3), and along the axially extending of the first piston cylinder (3).
9. probe assembly as claimed in claim 8, it is characterised in that also solid including two
The 4th piston cylinder (10) being connected on the body (1), the 4th piston cylinder (10)
Piston rod extends towards the direction opposite with the piston rod of the second piston cylinder (4), with respectively
It is supported in the relative borehole wall.
10. a kind of repeat formation tester (RFT), it is characterised in that including the claims 1-9
Probe assembly described in any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446220.6A CN107524440B (en) | 2016-06-20 | 2016-06-20 | Repeated stratum tester and probe assembly thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446220.6A CN107524440B (en) | 2016-06-20 | 2016-06-20 | Repeated stratum tester and probe assembly thereof |
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| CN107524440B CN107524440B (en) | 2023-12-22 |
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Also Published As
| Publication number | Publication date |
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| CN107524440B (en) | 2023-12-22 |
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