CN205778848U - A kind of repeat formation tester (RFT) and probe assembly thereof - Google Patents
A kind of repeat formation tester (RFT) and probe assembly thereof Download PDFInfo
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- CN205778848U CN205778848U CN201620609044.9U CN201620609044U CN205778848U CN 205778848 U CN205778848 U CN 205778848U CN 201620609044 U CN201620609044 U CN 201620609044U CN 205778848 U CN205778848 U CN 205778848U
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- 239000000523 sample Substances 0.000 title claims abstract description 133
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 48
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 90
- 239000010720 hydraulic oil Substances 0.000 description 16
- 239000007788 liquid Substances 0.000 description 11
- 239000003208 petroleum Substances 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 8
- 238000005070 sampling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000000903 blocking effect Effects 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
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of repeat formation tester (RFT) and probe assembly thereof, simplify pipeline road, reduce fault rate, improve logging efficiency.For solving above-mentioned technical problem, this utility model provides the probe assembly of a kind of repeat formation tester (RFT), including body, probe, first piston cylinder and the second piston cylinder on the body that is connected, described second piston cylinder is used for driving described first piston cylinder closer or far from stratum, in described probe set is contained in the piston rod of described first piston cylinder and described first piston cylinder can be run through and stretch into stratum, the piston rod of described second piston cylinder has the first oil circuit connected with its rodless cavity, and the second oil circuit connected with its rod chamber, described first oil circuit connects with the rod chamber of described first piston cylinder, described second oil circuit connects with the rodless cavity of described first piston cylinder.
Description
Technical field
This utility model relates to logging equipment technical field, particularly relates to a kind of repeat formation tester (RFT) and probe is total
Become.
Background technology
Repeat formation tester (RFT) is for directly obtaining oil-gas Layer fluid sample in Oil/gas Well, analyzing oil and gas stressor layer system
And calculate oil-gas Layer permeability.Once going into the well and can carry out formation pressure test for several times, the pressure traverse set up out is in geology, drilling well
In engineering and petroleum production engineering the most significant.
Wherein, probe assembly is the core of repeat formation tester (RFT).During well logging, by hydraulic-driven probe assembly to ground
Layer backup, and by packer, stratum is hedged off from the outer world；Now, under suction function, formation sample is entered via probe assembly
Enter the body of repeat formation tester (RFT), complete sampling.
Refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical probe assembly in prior art.
As it is shown in figure 1, probe assembly of the prior art is equipped with limit rail 100 at upper and lower two ends, by limit rail 100 respectively
Fix be connected with probe upper body 110 and lower probe body 120；Probe assembly includes two big piston cylinders 130 and two
Valve piston cylinder 140, two big piston cylinders 130 are in the two ends up and down in left side, and two valve piston cylinders 140 are in the two ends up and down on right side,
When the piston rod in big piston cylinder 130 and valve piston cylinder 140 is protruding, it is possible to backup probe assembly reclines stratum, on the contrary,
When the piston rod in big piston cylinder 130 and valve piston cylinder 140 inwardly bounces back, it is possible to drive probe assembly retraction.
Probe assembly also includes piston cylinder 150 and lower cylinder body 160, and both cooperate, it is achieved stretching of probe 170, enters
And realize the absorption of sample liquid.For realizing the flexible of probe 170, probe assembly of the prior art also includes spiral oil pipe 180 He
Sequence valve.Spiral oil pipe 180 is usually arranged as four, and two of which connects on piston cylinder 150, with the oil-feed of piston cylinder 150
Mouth connects with oil return opening, is used for driving lower cylinder body 160 to stretch, to drive probe 170 to recline or away from stratum；Two other is joined
It is connected on lower cylinder body 160, connects with oil-in and the oil return opening of lower cylinder body 160, the probe 170 in driving lower cylinder body 160
Mobile so that probe 170 draws sample liquid away from the filter cylinder on lower cylinder body 160, or drive probe 170 to stretch in filter cylinder.Suitable
Sequence valve bounces back for controlling probe 170 after probe assembly reclines stratum.Specifically, sequence valve arranges probe upper body
110 or lower probe body 120 on, and with one of them spiral oil pipe 180 connected on piston cylinder 150 and connecting at lower cylinder
One of them spiral oil pipe 180 on body 160 connects, and to control the break-make order of two spiral oil pipes 180, and then controls lower cylinder
The sequencing of body 160 and probe 170 motion, in order to drive probe 170 to recline behind stratum at lower cylinder body 160, control probe again
170 bounce back and draw sample liquid, it is ensured that probe 170 normally works.
There is techniques below problem in above-mentioned existing probe assembly:
In four spiral oil pipes 180, having two to connect on piston cylinder 150, two other connects on lower cylinder body 160,
In backup and retraction process, piston cylinder 150 and lower cylinder body 160 all can move, then four spiral oil pipes 180 and piston cylinder 150
The one end being connected with lower cylinder body 160 can be followed probe 170 and be moved；But, owing to wherein one end of each spiral oil pipe 180 is equal and liquid
Press pump connects, and hydraulic pump is fixedly connected on probe upper body 110 or lower probe body 120, the most each spiral oil pipe 180
It is respectively provided with a fixing end；During probe assembly backup and retraction, will stretch or compress spiral oil pipe 180, even
Spiral oil pipe 180 is in use caused to rupture and leakage of oil.
Additionally, the spacing between hydraulic pump and piston cylinder 150 and lower cylinder body 160 is relatively big, therefore the spiral oil that oil transportation is used
The number of turns of pipe 180 is many, and pipeline is long, and now, the impurity in hydraulic oil easily causes spiral oil pipe 180 and blocks.
In view of this, it would be highly desirable to for above-mentioned technical problem, optimize design repeat formation tester (RFT) of the prior art and
Its probe assembly, to simplify pipeline road, reduces fault rate, improves logging efficiency.
Utility model content
The purpose of this utility model, for providing a kind of repeat formation tester (RFT) and probe assembly thereof, simplifies petroleum pipeline
Road, reduces fault rate, improves logging efficiency.
For solving above-mentioned technical problem, this utility model provides the probe assembly of a kind of repeat formation tester (RFT), including
Body, probe, first piston cylinder and the second piston cylinder on the body of being connected, described second piston cylinder is used for driving described
First piston cylinder is closer or far from stratum, in described probe set is contained in the piston rod of described first piston cylinder and can run through described
First piston cylinder and stretch into stratum, the piston rod of described second piston cylinder has the first oil circuit connected with its rodless cavity, and
The second oil circuit connected with its rod chamber, described first oil circuit connects with the rod chamber of described first piston cylinder, described second oil
Road connects with the rodless cavity of described first piston cylinder.
Probe assembly of the present utility model, is connected in the second piston cylinder on body, then at the piston of the second piston cylinder
First oil circuit and the second oil circuit are set on bar, in order to hydraulic oil introduces first piston cylinder, and then drives probe by hydraulic oil
Near or away from stratum, to realize the absorption of sample.Owing to this utility model is by setting on the piston rod of the second piston cylinder
To put oil circuit be first piston oil supply cylinder, it is to avoid is separately provided pipeline road for first piston cylinder, thus simplifies pipeline road；
What is more important, due to the second piston cylinder piston rod drive first piston cylinder motion, then the piston rod of the second piston cylinder with
First piston cylinder to move, be equivalent to a mobile oil sources of first piston cylinder, provide hydraulic oil for first piston cylinder, then second
Pipeline road between piston cylinder with first piston cylinder can also along with together with move, with the two ends of pipeline road in prior art
Compared with connecting with body and first piston cylinder respectively, will not stretch or compress pipeline road because of the motion of first piston cylinder,
Ensure that the reliability of oil circuit, it is to avoid because pipeline road fracture causes leakage of oil；And, the piston rod of the second piston cylinder is equivalent to one
Individual mobile oil sources, and compared with body fuel feeding, can significantly shorten the length of pipeline road, and pipeline road does not exist and draws in addition
Stretch and compress, it is to avoid oil circuit blocking, and then ensure the reliability driven.
Alternatively, also including the 3rd piston cylinder of piston rod as described first piston cylinder, described probe is as described
The piston rod of the 3rd piston cylinder, and towards the rodless cavity extension of described first piston cylinder, to run through described 3rd piston cylinder and institute
State first piston cylinder and stretch into stratum；Two oil pockets of described 3rd piston cylinder can be to the corresponding oil pocket of described first piston cylinder
Connection.
Alternatively, the control valve being integrated on described 3rd piston cylinder, the first hydraulic fluid port of described control valve and institute are also included
Stating the rodless cavity connection of the 3rd piston cylinder, the second hydraulic fluid port connects with the rodless cavity of described first piston cylinder；It is in backup working position
Time, the oil pressure of the rod chamber of described first piston cylinder rises to predetermined value and connects described first hydraulic fluid port and described second hydraulic fluid port；
When being in retraction working position, described second hydraulic fluid port to described first hydraulic fluid port unilaterally connected.
Alternatively, described control valve includes that overflow valve and check valve, described overflow valve have and described first piston cylinder
The control port of rod chamber connection, and two actuator ports connected with described first hydraulic fluid port and described second hydraulic fluid port；Described
Check valve is for by described second hydraulic fluid port to described first hydraulic fluid port unilaterally connected.
Alternatively, also include that cartridge filter, described cartridge filter are arranged on bottom the cylinder barrel of described 3rd piston cylinder, and with described
Probe extends in the same direction；It is provided with bottom the cylinder barrel of described first piston cylinder and passes for described cartridge filter and enter the through hole on stratum, institute
State cartridge filter to be tightly connected with described through hole；The pinhead sleeve of described probe is contained in described cartridge filter.
Alternatively, the cylinder barrel bottom surface of described first piston cylinder is provided with sealing member, and described sealing ring is wound on described cartridge filter
Circumference, in order to described cartridge filter is tightly connected with described through hole, and by described cartridge seal in stratum.
Alternatively, also include the first spiral oil pipe and the second spiral oil pipe, the two ends of described first spiral oil pipe respectively with
The rod chamber of described first piston cylinder and described first oil communication；The two ends of described second spiral oil pipe are respectively with described first
The rodless cavity of piston cylinder and described second oil communication.
Alternatively, including two described second piston cylinders, the piston rod of the second piston cylinder described in two is respectively supported at described
The radially opposite sides of first piston cylinder, and all axially extending along described first piston cylinder.
Alternatively, two the 4th piston cylinders being connected on the body, the piston rod of described 4th piston cylinder are also included
Extend towards the direction contrary with the piston rod of described second piston cylinder, to be respectively supported at the relative borehole wall.
This utility model also provides for a kind of repeat formation tester (RFT), including the probe assembly described in any of the above-described item.
Owing to repeat formation tester (RFT) of the present utility model includes the probe assembly described in any of the above-described item, therefore above-mentioned
Technique effect produced by one probe assembly is all applicable to repeat formation tester (RFT) of the present utility model, the most superfluous
State.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of typical probe assembly in prior art；
The probe assembly that Fig. 2 is the provided repeat formation tester (RFT) of this utility model is in a kind of detailed description of the invention
Structural representation；
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 the well logging view of the probe assembly of the provided repeat formation tester (RFT) of this utility model.
In Fig. 1:
Limit 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 the 3, second piston cylinder the 4, first oil circuit the 41, second oil circuit the 42, the 3rd piston cylinder
5, control valve 6, cartridge filter 7, sealing member the 8, first spiral oil pipe the 91, second spiral oil pipe the 92, the 4th piston cylinder 10.
Detailed description of the invention
Core of the present utility model, for providing a kind of repeat formation tester (RFT) and probe assembly thereof, simplifies petroleum pipeline
Road, reduces fault rate, improves logging efficiency.
In order to make those skilled in the art be more fully understood that the technical solution of the utility model, below in conjunction with the accompanying drawings and tool
The utility model is described in further detail for body embodiment.
First, second word such as grade as herein described, all for the same or similar multiple parts of specification configuration, does not indicates that suitable
Certain particular determination of sequence.In the case of without specified otherwise, as herein described up and down with the use of repeat formation tester (RFT)
State is reference, when repeat formation tester (RFT) is in use state, under the direction of the earth's crust is, away from the direction of the earth's crust
For upper.The bottom of each cylinder barrel described herein is with piston cylinder for reference to definition, and when piston cylinder uses state, piston is with its bottom surface
Just to rodless cavity, rodless cavity constitutes piston cylinder away from the bottom surface that one side is cylinder barrel of piston, the part at the place, bottom surface of cylinder barrel
The bottom of cylinder barrel.
Refer to Fig. 2, this utility model provides the probe assembly of a kind of repeat formation tester (RFT), including body 1 He
The probe assembly being connected with body 1, described body 1 constitutes the basis of probe assembly, specifically can include upper and lower two parts, as
Described in background technology, body 1 is fixing with other parts of repeat formation tester (RFT) to be connected；Probe assembly can include probe 2,
First piston cylinder 3 and the second piston cylinder 4, wherein, the second piston cylinder 4 is fixedly connected on body 1, and with first piston cylinder 3 even
Connect, be used for driving first piston cylinder 3 to move, with backup first piston cylinder 3 near stratum or drive first piston cylinder 3 bounce back and
Away from stratum；Probe 2 is sleeved in first piston cylinder 3, along with first piston cylinder 3 near or away from stratum, and, probe 2
Can also move cylinder barrel relative to first piston cylinder 3 under the driving of hydraulic coupling, and first piston cylinder 3 can be run through and stretch into ground
In Ceng, and then pipette samples from stratum, complete sampling.
Specifically, in probe assembly of the present utility model, the piston rod of the second piston cylinder 4 can be defined as the second piston
Bar, can be built-in with oil circuit in this second piston rod, is specifically as follows and includes the first oil circuit 41 and the second oil circuit 42, the first oil circuit
41 connect with the rodless cavity of the second piston cylinder 4, and the second oil circuit 42 connects with the rod chamber of the second piston cylinder 4；Wherein, the first oil circuit
41 can connect with the rod chamber of first piston cylinder 3, and the second oil circuit 42 can connect with the rodless cavity of first piston cylinder 3.Now,
By the second piston rod, can the hydraulic oil in the second piston cylinder 4 be introduced in first piston cylinder 3, say, that by second
Piston rod, is fed directly to first piston cylinder 3 by the fluid in the second piston cylinder 4 so that the second piston cylinder 4 becomes first and lives
The oil sources of plug cylinder 3.
Use said structure, pipeline road is set between the second piston rod and first piston cylinder 3 and can realize the first work
The fuel feeding of plug cylinder 3, and without drawing pipeline road on body 1 to first piston cylinder 3.Compared with body 1, the second piston rod can
To move (the i.e. second piston rod drives first piston cylinder 3 to move) along with first piston cylinder 3, it is connected to the second piston rod and first
Pipeline road between piston cylinder 3 moves as well as both motions, i.e. the two ends of pipeline road are mobile terminal；This
Time, would not stretch or compress pipeline road because of the motion of first piston cylinder 3, extend the service life of pipeline road,
Avoid pipeline road to rupture because of the pressure that bears repeatedly.It is additionally, since pipeline road and can be arranged directly on the first work
Between plug cylinder 3 and the second piston rod, compared with the pipeline road being arranged in prior art between body 1 with first piston cylinder 3,
This utility model is effectively shortened the length of pipeline road, simplifies pipeline road, and then it is blocked to reduce pipeline road
Probability, thus improve the reliability of oil transportation, it is ensured that the action of backup and retraction may be carried out.
For realizing the connection of the first oil circuit 41 and the rod chamber of first piston cylinder 3, can on the second piston rod the first oil
The oil-out connection petroleum pipeline on road 41, then connects the rod chamber of the other end of petroleum pipeline with first piston cylinder 3.Or, can
To arrange extension on the cylinder barrel of first piston cylinder 3, this extension can extend to the second piston cylinder 4, it is possible to second
Piston rod connects, then can connect by the first oil circuit 41 of built-in oil circuit, this built-in oil circuit and the second piston cylinder 4 in extension,
It also is able to connect with the rod chamber of first piston cylinder 3 simultaneously, and then the rod chamber of the first oil circuit 41 with first piston cylinder 3 is connected
Logical.
In like manner, it would however also be possible to employ the second oil circuit 42 is connected by petroleum pipeline with the rodless cavity of first piston cylinder 3, or can adopt
Use above-mentioned extension, extension additionally arranges a built-in oil circuit, to realize the nothing of the second oil circuit 42 and first piston cylinder 3
The connection in bar chamber.
For realizing the driving of probe 2, this utility model can also include that the 3rd piston cylinder 5, probe 2 specifically can be sleeved on
In 3rd piston cylinder 5, as the piston rod of the 3rd piston cylinder 5, the 3rd piston cylinder 5 now can be as first piston cylinder 3
Piston rod.Specifically, bottom the cylinder barrel of first piston cylinder 3 can towards stratum, when i.e. first piston cylinder 3 is in well with
The bottom of cylinder barrel as the piston rod of first piston cylinder 3, is directed away from the cylinder of first piston cylinder 3 towards the borehole wall, the 3rd piston cylinder 5
The direction of cylinder extends, and i.e. away from stratum, the 3rd piston cylinder 5 is using the bottom surface of its cylinder barrel as the piston of first piston cylinder 3 in other words；
Probe 2, as the piston rod of the 3rd piston cylinder 5, points to first piston cylinder 3 and the cylinder barrel of the 3rd piston cylinder 5 with the syringe needle of probe 2
Bottom, i.e. probe 2 extend towards the rodless cavity of first piston cylinder 3, and run through the 3rd piston cylinder 5 and first piston cylinder 3 and stretch into
In stratum, so as to draw sample liquid from stratum.
Now, in order to hydraulic oil is introduced the 3rd piston cylinder 5, in order to drive probe 2 to move by hydraulic oil, can be by the
The corresponding oil pocket connection of two oil pockets of one piston cylinder 3 and the 3rd piston cylinder 5, i.e. can by the rodless cavity of first piston cylinder 3 with
The rodless cavity connection of the 3rd piston cylinder 5, by rod chamber and the rod chamber connection of the 3rd piston cylinder 5 of first piston cylinder 3.All right
By connecting of the component controls first piston cylinders 3 such as control valve 6 and the 3rd piston cylinder 5, or control to introduce to the 3rd piston cylinder 5
Fluid by time, in order to after probe 2 arrive stratum, carry out the driving to probe 2 again, and then realize sampling.
In a kind of detailed description of the invention, can on the 3rd piston cylinder 5 integrated control valve 6, control valve 6 can have two
Individual hydraulic fluid port, the respectively first hydraulic fluid port and the second hydraulic fluid port, the first hydraulic fluid port and the 3rd piston cylinder 5 rodless cavity connection, the second hydraulic fluid port with
The rodless cavity connection of first piston cylinder 3.When being in backup working position, the oil pressure of the rod chamber of first piston cylinder 3 can be made
For controlling source, when the oil pressure of the rod chamber of first piston cylinder 3 rises to predetermined value, connect the first hydraulic fluid port and the second hydraulic fluid port；The
When one hydraulic fluid port and the connection of the second hydraulic fluid port so that the rodless cavity of the 3rd piston cylinder 5 connects with the rodless cavity of first piston cylinder 3, due to
Now the rodless cavity of first piston cylinder 3 connects with fuel tank, then the rodless cavity of the 3rd piston cylinder 5 connects with fuel tank so that the 3rd lives
The rodless cavity of plug cylinder 5 can emptying smoothly, the hydraulic oil of first piston cylinder 3 rod chamber can enter the 3rd piston cylinder 5 smoothly
Rod chamber, to drive relative 3rd piston cylinder 5 of probe 2 to move.When being in retraction working position, can be by the second hydraulic fluid port to first
Hydraulic fluid port unilaterally connected, then the hydraulic oil of the rodless cavity of first piston cylinder 3 can the rodless cavity of unidirectional inflow the 3rd piston cylinder 5, with
Just probe 2 is pushed to bottom the cylinder barrel of the 3rd piston cylinder 5, and drives probe 2 to bounce back by the 3rd piston cylinder 5.
In detail, the version of control valve 6 does not limits, and control valve 6 is specifically as follows combination valve, when control valve 6 is combination
During valve, overflow valve and check valve can be included.Wherein, overflow valve can have control port and two actuator ports, controls oil
Mouth connects with the rod chamber of first piston cylinder 3, and two actuator ports connect with above-mentioned first hydraulic fluid port and the second hydraulic fluid port respectively, in order to
Oil pressure at the rod chamber of first piston cylinder 3 rises to control the first hydraulic fluid port and the connection of the second hydraulic fluid port during predetermined value.Check valve can
To be arranged on the connection oil circuit of the first hydraulic fluid port and the second hydraulic fluid port, and bounce back working position time by the second hydraulic fluid port to the first hydraulic fluid port list
To connection.
It will be understood by those skilled in the art that the version of control valve 6 is various, be not limited to combinations thereof valve, also
It is not limited to combinations thereof form.Such as, above-mentioned control valve 6 can also be threeway or the cross valve with at least two working position,
To realize above-mentioned functions by the switching of working position；Or can be pilot-operated type valve, and by guide's hydraulic fluid port and first piston cylinder 3
Rod chamber connects, with oil pressure cntrol the first hydraulic fluid port and the connection situation of the second hydraulic fluid port of the rod chamber by first piston cylinder 3.
Below in conjunction with Fig. 3-6, backup and retraction process to probe assembly of the present utility model are described in detail.
As shown in Figure 3 and Figure 4, use above-mentioned probe assembly, specifically can realize the backup of probe assembly with following form.
It is possible, firstly, to the rodless cavity offer hydraulic oil being the second piston cylinder 4 by hydraulic power sources such as the hydraulic pumps on body 1
Source, drives first piston cylinder 3 to move towards the direction near stratum by the second piston rod；Meanwhile, by the second piston rod
The first oil circuit 41, hydraulic oil is introduced the rod chamber of first piston cylinder 3, drives the 3rd piston cylinder 5 nothing to first piston cylinder 3
Move in bar chamber, and then the 3rd piston cylinder 5 is reclined stratum together along with first piston cylinder 3；Now, first piston cylinder 3 has
The fluid of bar intracavity constantly raises, but without obtaining described predetermined value, so time the 3rd piston cylinder 5 rodless cavity do not have and postal
Case connects, the rod chamber of the 3rd piston cylinder 5 the most just cannot oil-feed, the holding of probe 2 and the relative position of the 3rd piston cylinder 5 is constant,
I.e. probe 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, the 3rd piston cylinder 5 has been located
Bottom the cylinder barrel of first piston cylinder 3, probe 2 moves along with the 3rd piston cylinder 5 and stretches in stratum, as shown in Figure 7；Now,
The oil pressure of the rodless cavity of first piston cylinder 3 reaches described predetermined value, and control valve 6 controls the first hydraulic fluid port and the connection of the second hydraulic fluid port, enters
And the rodless cavity of the 3rd piston cylinder 5 is connected with the rodless cavity of first piston cylinder 3 so that the rod chamber of the 3rd piston cylinder 5 starts
Oil-feed, promotes the probe 2 coming into stratum to bounce back, sucks sample liquid to produce negative pressure from stratum.In whole course of action,
Each parts can move according to the direction shown in Fig. 3 and Fig. 4 hollow core arrow.It is visible, by above-mentioned backup process, it is possible to achieve
Sampling.
As shown in Figure 5 and Figure 6, when being in retraction working position, high pressure can be inputted to the rod chamber of the second piston cylinder 4
Oil, in order to drive first piston cylinder 3 to bounce back by the second piston rod so that first piston cylinder 3 is directed away from the direction fortune on stratum
Dynamic.Owing to hydraulic oil is inputted the rodless cavity of first piston cylinder 3 by the second piston rod by the second oil circuit 42, control valve 6 is again by
The rodless cavity connection of the rodless cavity of one piston cylinder 3 and the 3rd piston cylinder 5, then hydraulic oil flow simultaneously into first piston cylinder 3 without bar
Chamber and the rodless cavity of the 3rd piston cylinder 5；The rodless cavity oil-feed of the 3rd piston cylinder 5, drives probe 2 to stretch out, and probe 2 stops drawing sample
Liquid also moves to, bottom the cylinder barrel of the 3rd piston cylinder 5, abut bottom the cylinder barrel of the 3rd piston cylinder 5, final and the 3rd piston cylinder 5
Geo-stationary, as shown in Figure 6；Meanwhile, the rodless cavity oil-feed of first piston cylinder 3, drive the 3rd piston cylinder 5 to be directed away from stratum
Move in direction, then the 3rd piston cylinder 5 drives probe 2 to move, and finally makes first piston cylinder the 3, the 3rd piston cylinder 5 and probe 2
All away from stratum, it is achieved that the retraction of whole probe assembly.In whole course of action, each parts can be according to Fig. 5 and Fig. 6 hollow
Direction motion shown in heart arrow.
Please further combined with Fig. 7, when being sampled, according to shown in Fig. 7, repeat formation tester (RFT) can be stretched into well
In, then according to above-mentioned steps performs backup and retracting action；When needs sample again, above-mentioned backup can be repeated and move
Make and retracting action, say, that those skilled in the art can carry out many sub-samplings as required.
Additionally, as seen in figures 3-6, probe assembly of the present utility model can also include that cartridge filter 7, cartridge filter 7 can set
Put bottom the cylinder barrel of the 3rd piston cylinder 5, specifically can be in the cylinder barrel bottom surface of the 3rd piston cylinder 5 towards the nothing of first piston cylinder 3
Bar chamber extends and forms tube-in-tube structure, it is possible to arranged in the bottom (i.e. away from the direction of the 3rd piston cylinder 5) of this tube-in-tube structure
The parts such as filter screen, to form whole cartridge filter 7.Visible, the cartridge filter 7 in the application extends in the same direction with described probe 2.Can be
Being provided with through hole bottom the cylinder barrel of first piston cylinder 3, described cartridge filter 7 can pass through hole and enter in stratum, described cartridge filter 7
And it is tightly connected between described through hole；Can also be contained in by the pinhead sleeve of probe 2 in described cartridge filter 7, probe 2 can institute relatively
State cartridge filter 7 moving axially at the 3rd piston cylinder 5, in order to its syringe needle is stretched into stratum or is retracted by stratum, then syringe needle
Be equivalent to a sampler, by negative pressure absorbing sample liquid.Now, the sample liquid in stratum can first pass around the filtration of cartridge filter 7,
Then enter back in probe 2, and then reduce the percentage of impurity of sampled liquid；And, probe 2 can also be played support by cartridge filter 7
And guide effect, to improve the motion credibility of probe 2, and then improve sampling efficiency.
Can also arrange sealing member 8 in the cylinder barrel bottom surface of first piston cylinder 3, sealing member 8 specifically can be looped around cartridge filter 7
Circumference, thus the through hole of cartridge filter 7 with first piston cylinder 3 is sealed even；Meanwhile, when first piston cylinder 3 reclines stratum, close
Sealing 8 seals between cylinder barrel and the stratum being pressed on first piston cylinder 3, and then is sealed in stratum by cartridge filter 7, close to be formed
Close space, then just can produce negative pressure when probe 2 bounces back, and then from stratum, draw sample liquid, refer to Fig. 4.
On the basis of the above, as described above, petroleum pipeline can be used herein to realize the first oil circuit 41 and first piston cylinder 3
Connection, it would however also be possible to employ petroleum pipeline is to realize the connection of the second oil circuit 42 and first piston cylinder 3.Specifically, such as Fig. 2-7 institute
Showing, described petroleum pipeline can be spiral oil pipe, and now, this utility model can also include the first spiral oil pipe 91 and the second spiral
Oil pipe 92；The two ends of the first spiral oil pipe 91 can rod chamber with the first oil circuit 41 and first piston cylinder 3 connect respectively, and second
The two ends of spiral oil pipe 92 can rodless cavity with the second oil circuit 42 and first piston cylinder 3 connect respectively, and then is drawn by hydraulic oil
Enter first piston cylinder 3 so that first piston cylinder 3 and the second piston cylinder 4 share an oil circuit.
Meanwhile, for realizing the steady driving to first piston cylinder 3, this utility model can arrange two described second pistons
Cylinder 4.Now, the first oil circuit 41 and the second oil circuit 42 all can be arranged on one of them piston rod of the second piston cylinder 4, it is possible to
To be separately positioned on the piston rod of two the second piston cylinders 4, those skilled in the art can select the first oil circuit as required
41 and second oil circuit 42 position is set.The piston rod of two the second piston cylinders 4 can be respectively supported at the two of first piston cylinder 3
Side, specifically may be at the radially opposite sides of first piston cylinder 3, it is also possible to axially extending along first piston cylinder 3, to improve the
The driving reliability of one piston cylinder 3.
Additionally, this utility model can also include two the 4th piston cylinders 10, two the 4th piston cylinders 10 can also the company of fixing
It is connected on body 1, and, the piston cylinder of two the 4th piston cylinders 10 can be oppositely arranged with the piston cylinder of the second piston cylinder 4, i.e.
The piston rod of the 4th piston cylinder 10 extends towards the direction contrary with the piston rod of the second piston cylinder 4, then when the second piston cylinder 4 He
When the piston rod of the 4th piston cylinder 10 all stretches out, can be supported in well relative to the borehole wall, thus whole probe assembly is propped up
Support is fixing, as shown in Figure 7, in order to follow-up sampling is smoothed out.
It should be noted that for ease of the flowing clearly illustrating hydraulic oil, in the hydraulic schematic diagram that Fig. 4 and Fig. 6 is given,
Filled black part in each piston cylinder represents hydraulic oil, is in the filled black part table bottom the cylinder barrel of first piston cylinder 3
Show sealing member 8.
This utility model still further provides a kind of repeat formation tester (RFT), uses above-mentioned probe assembly.Due to
The parts that repeat formation tester (RFT) is comprised are relatively big, and the structure of each parts is complex, specifically refer to prior art, herein
Repeat no more.
Above a kind of repeat formation tester (RFT) provided by the utility model and probe assembly thereof are carried out detailed Jie
Continue.Principle of the present utility model and embodiment are set forth by specific case used herein, saying of above example
Bright being only intended to helps to understand method of the present utility model and core concept thereof.It should be pointed out that, for the art is common
For technical staff, on the premise of without departing from this utility model principle, it is also possible to this utility model is carried out some improvement and
Modifying, these improve and modification also falls in this utility model scope of the claims.
Claims (10)
1. a probe assembly for repeat formation tester (RFT), including body (1), probe (2), first piston cylinder (3) and be connected
The second piston cylinder (4) on described body (1), described second piston cylinder (4) is used for driving described first piston cylinder (3) close
Or away from stratum, in described probe (2) is sleeved on the piston rod of described first piston cylinder (3) and described first piston can be run through
Cylinder (3) and stretch into stratum, it is characterised in that
The piston rod of described second piston cylinder (4) has the first oil circuit (41) connected with its rodless cavity, and with its rod chamber
Second oil circuit (42) of connection, described first oil circuit (41) connects with the rod chamber of described first piston cylinder (3), described second oil
Road (42) connects with the rodless cavity of described first piston cylinder (3).
2. probe assembly as claimed in claim 1, it is characterised in that also include the piston as described first piston cylinder (3)
3rd piston cylinder (5) of bar, described probe (2) is as the piston rod of described 3rd piston cylinder (5), and towards described first piston
The rodless cavity of cylinder (3) extends, and stretches into stratum to run through described 3rd piston cylinder (5) and described first piston cylinder (3)；Described
Two oil pockets of three piston cylinders (5) can connect to the corresponding oil pocket of described first piston cylinder (3).
3. probe assembly as claimed in claim 2, it is characterised in that also include being integrated on described 3rd piston cylinder (5)
Control valve (6), the first hydraulic fluid port of described control valve (6) connects with the rodless cavity of described 3rd piston cylinder (5), the second hydraulic fluid port and institute
State the rodless cavity connection of first piston cylinder (3)；When being in backup working position, the oil pressure of the rod chamber of described first piston cylinder (3)
Rise to predetermined value and connect described first hydraulic fluid port and described second hydraulic fluid port；When being in retraction working position, described second hydraulic fluid port is extremely
Described first hydraulic fluid port unilaterally connected.
4. probe assembly as claimed in claim 3, it is characterised in that described control valve (6) includes overflow valve and check valve, institute
State overflow valve and there is the control port that the rod chamber with described first piston cylinder (3) connects, and with described first hydraulic fluid port and institute
State two actuator ports of the second hydraulic fluid port connection；Described check valve is for by described second hydraulic fluid port to the described first unidirectional company of hydraulic fluid port
Logical.
5. probe assembly as claimed in claim 2, it is characterised in that also including cartridge filter (7), described cartridge filter (7) is arranged
Bottom the cylinder barrel of described 3rd piston cylinder (5), and extend in the same direction with described probe (2)；The cylinder barrel of described first piston cylinder (3)
Bottom is provided with and passes for described cartridge filter (7) and enter the through hole on stratum, and described cartridge filter (7) is tightly connected with described through hole；
The pinhead sleeve of described probe (2) is contained in described cartridge filter (7).
6. probe assembly as claimed in claim 5, it is characterised in that the cylinder barrel bottom surface of described first piston cylinder (3) is provided with close
Sealing (8), described sealing member (8) is looped around the circumference of described cartridge filter (7), in order to by described cartridge filter (7) and described through hole
It is tightly connected, and described cartridge filter (7) is sealed in stratum.
7. the probe assembly as described in any one of claim 1-6, it is characterised in that also include the first spiral oil pipe (91) and
Two spiral oil pipes (92), the two ends of described first spiral oil pipe (91) respectively with rod chamber and the institute of described first piston cylinder (3)
State the first oil circuit (41) connection；The two ends of described second spiral oil pipe (92) respectively with the rodless cavity of described first piston cylinder (3)
Connect with described second oil circuit (42).
8. probe assembly as claimed in claim 7, it is characterised in that include two described second piston cylinders (4), described in two the
The piston rod of two piston cylinders (4) is respectively supported at the radially opposite sides of described first piston cylinder (3), and all along described first piston cylinder
(3) axially extending.
9. probe assembly as claimed in claim 8, it is characterised in that also include two the be connected on described body (1)
Four piston cylinders (10), the piston rod of described 4th piston cylinder (10) is towards contrary with the piston rod of described second piston cylinder (4)
Direction extends, to be respectively supported at the relative borehole wall.
10. a repeat formation tester (RFT), it is characterised in that include that the probe described in any one of the claims 1-9 is total
Become.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620609044.9U CN205778848U (en) | 2016-06-20 | 2016-06-20 | A kind of repeat formation tester (RFT) and probe assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620609044.9U CN205778848U (en) | 2016-06-20 | 2016-06-20 | A kind of repeat formation tester (RFT) and probe assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205778848U true CN205778848U (en) | 2016-12-07 |
Family
ID=58133347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620609044.9U Withdrawn - After Issue CN205778848U (en) | 2016-06-20 | 2016-06-20 | A kind of repeat formation tester (RFT) and probe assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205778848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524440A (en) * | 2016-06-20 | 2017-12-29 | 万瑞（北京）科技有限公司 | A kind of repeat formation tester (RFT) and its probe assembly |
-
2016
- 2016-06-20 CN CN201620609044.9U patent/CN205778848U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524440A (en) * | 2016-06-20 | 2017-12-29 | 万瑞（北京）科技有限公司 | A kind of repeat formation tester (RFT) and its probe assembly |
| CN107524440B (en) * | 2016-06-20 | 2023-12-22 | 万瑞（北京）科技有限公司 | Repeated stratum tester and probe assembly thereof |
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| AV01 | Patent right actively abandoned |
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