CN208220773U - Fluid pressure type downhole sampler - Google Patents
Fluid pressure type downhole sampler Download PDFInfo
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- CN208220773U CN208220773U CN201820543502.2U CN201820543502U CN208220773U CN 208220773 U CN208220773 U CN 208220773U CN 201820543502 U CN201820543502 U CN 201820543502U CN 208220773 U CN208220773 U CN 208220773U
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Abstract
The utility model is a kind of fluid pressure type downhole sampler, including a top connection, the lower inner wall of top connection are fixedly connected with a core barrel, and the lower part outer wall of top connection is fixedly connected with cylinder body up and down；Sealing is slidably equipped with a piston cylinder between core barrel and cylinder body；The lower part outer wall of cylinder body is fixedly connected with a collecting vessel；One seal cavity is enclosed by the top surface of core barrel, cylinder body, the bottom surface of top connection and piston cylinder, the bucket wall of core barrel is equipped with the first through hole being connected to seal cavity；Cylinder body is equipped with the second through-hole through its side wall, and piston cylinder is equipped with the third through-hole through its side wall；Positioned at third through-hole lower section and be equipped with and third through-hole and the runner that is connected of collection barrel cavity between piston cylinder and core barrel.The fluid pressure type downhole sampler of the utility model, can the polymer accurately to specified sample position be sampled, with improve polymer samples analysis precision and polymer flooding effect evaluation accuracy.
Description
Technical field
The utility model is the fluid pressure type well about poured polymer well subsurface sampler more particularly to a kind of coiled tubing
Lower sampler.
Background technique
Waterflooding extraction later period, oil field main body have entered " double height " development phase of High water cut, high recovery percent of reserves, waterflooding effect
Can worse and worse, and tertiary oil recovery improves recovery efficiency technique studies have shown that polymer flooding is that one kind increases substantially oil recovering
The technology of rate.But in polymer injection process, polymer will receive shear action and downhole temperature, formation water salinity etc.
The influence of conditions down-hole causes the parameters such as the real fluid viscosity for injecting target zone that geologic requirements are not achieved, thus needs to note
The polymer for entering underground is sampled analysis.And current injection well downhole sampler is taken using substituted sampling method
Sample device is always maintained at open state during going into the well, and closes sampler after completing sampling.But it since polymer viscosity is larger, replaces
In generation, will lead to polymer in the process, foul is trapped in sample collection bucket, so that the reality of samples taken and specified sample position
The parameters such as the viscosity of fluid have very big error, and then influence the evaluation of polymer samples analysis and polymer flooding effect.
The present inventor based on years of experience and practice in relevant industries, proposes a kind of fluid pressure type well sampling as a result,
Device, to overcome the deficiencies of existing technologies.
Utility model content
The purpose of this utility model is to provide a kind of fluid pressure type downhole samplers, can be accurately to specified sample position
Polymer be sampled, with improve polymer samples analysis precision and polymer flooding effect evaluation accuracy.
The purpose of this utility model is achieved in that a kind of fluid pressure type downhole sampler, the fluid pressure type well sampling
Device includes a top connection, and the lower inner wall of the top connection is fixedly connected with a core barrel, and the lower part outer wall of the top connection is fixed
The cylinder body of connection up and down；Sealing is slidably equipped with a piston cylinder between the core barrel and cylinder body；The lower part outer wall of the cylinder body
It is fixedly connected with a collecting vessel；One seal cavity is enclosed by the top surface of core barrel, cylinder body, the bottom surface of top connection and piston cylinder,
The bucket wall of the core barrel is equipped with the first through hole being connected to the seal cavity；The cylinder body is equipped with through its side wall
Second through-hole, the piston cylinder are equipped with the third through-hole through its side wall；The circumferential position of second through-hole and third through-hole
Set correspondence；The first position and third through-hole that there is piston cylinder third through-hole to be located above the second through-hole are corresponding with the second through-hole
The second position of conducting；Positioned at third through-hole lower section and between piston cylinder and core barrel be equipped with and third through-hole and collecting vessel
The runner of inner cavity conducting.
In a better embodiment of the utility model, the inner wall of the cylinder body is towards core barrel projection single order bench；
The piston cylinder includes the flange part of an ontology and cylinder ontology upper end, cylinder ontology sealing be slidably installed in ladder section and core barrel it
Between, the flange part is located above ladder section, and seals and be slidedly arranged between core barrel and cylinder body；The bottom end of flange part and ladder section
Tip contact be piston cylinder the second position.
In a better embodiment of the utility model, the bottom of the cylinder body ladder section is to one backstop of core barrel projection
Ring is equipped with a pressure spring between the baffle ring upper surface and piston cylinder lower end surface；The bottom end of flange part and the top of ladder section have
There is certain distance, and is the first position of piston cylinder when pressure spring is uncompressed.
In a better embodiment of the utility model, the piston cylinder initial position is identical as first position；It is described
When piston cylinder is in initial position, positioned between piston cylinder and cylinder body by pin.
In a better embodiment of the utility model, the runner is the ditch being arranged in the core barrel outside wall surface
Slot.
In a better embodiment of the utility model, the runner is the ditch being arranged on the piston cylinder inner wall
Slot.
In a better embodiment of the utility model, the runner be correspondingly arranged at the core barrel outside wall surface and
Groove on the piston cylinder inner wall.
In a better embodiment of the utility model, outer peripheral surface structure that the runner is radially reduced by core barrel lower part
At.
From the above mentioned, the fluid pressure type downhole sampler of the utility model, for the well sampling of polymer injection well, with continuous
After oil pipe tripping in target position, suppressed in coiled tubing, push piston cylinder be displaced downwardly to the second position, make third through-hole with
The corresponding conducting of second through-hole (open inlet opening and be connected to collecting vessel) is sampled；Stop suppressing after the completion of sampling, piston
For cylinder since spring force is reset to first position, feed liquor bore closure completes sampling；The sample is collected in target position.By
During reaching the tripping in predetermined position, fluid pressure type downhole sampler is in close state always, during tripping in not
Can enter other depth locations polymer or sundries, therefore can the polymer accurately to specified sample position take
Sample, the parameters such as viscosity of sample are more accurate, and it is accurate that the precision and polymer flooding effect for which thereby enhancing polymer samples analysis are evaluated
Degree.
Detailed description of the invention
Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model
It encloses.Wherein:
Fig. 1: the structural schematic diagram of initial position is in for piston cylinder in the utility model fluid pressure type downhole sampler.
Fig. 2: the structural schematic diagram of the second position is in for piston cylinder in the utility model fluid pressure type downhole sampler.
Drawing reference numeral:
100, fluid pressure type downhole sampler；
1, top connection；
2, core barrel；
21, first through hole；
3, cylinder body；
31, the second through-hole；
32, ladder section；
33, baffle ring；
4, piston cylinder；
41, third through-hole；
42, cylinder ontology；
43, flange part；
5, collecting vessel；
6, seal cavity；
7, runner；
8, pressure spring；
9, shear pin.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now compareing Detailed description of the invention
Specific embodiment of the present utility model.
As shown in Figure 1 and Figure 2, the embodiments of the present invention propose a kind of fluid pressure type downhole sampler 100, described hydraulic
Formula downhole sampler 100 includes a top connection 1, and top connection 1 is tubular configured joint up and down, the left side of top connection in Fig. 1
For top, right side is lower part；The lower inner wall of the top connection 1 is fixedly connected with a core barrel 2, outside the lower part of the top connection 1
Wall is fixedly connected with cylinder body 3 up and down；Sealing is slidably equipped with a piston cylinder 4 between the core barrel 2 and cylinder body 3；The cylinder body 3
Lower part outer wall be fixedly connected with a collecting vessel 5；It is enclosed by the top surface of core barrel 2, cylinder body 3, the bottom surface of top connection 1 and piston cylinder 4
A seal cavity 6 is formed, the bucket wall of the core barrel 2 is equipped with the first through hole 21 being connected to the seal cavity 6；The cylinder
Body 3 is equipped with the second through-hole 31 through its side wall, and the piston cylinder 4 is equipped with the third through-hole 41 through its side wall；It is described
Second through-hole 31 it is corresponding with the circumferential position of third through-hole 41 (piston cylinder 4 and core barrel 2 is circumferentially positioned, make between the two not
Can circumferentially rotate, and can only in axial direction slide up and down, this positioning method uses the prior art, and details are not described herein), piston
Cylinder 4 is located at the first position (as shown in Figure 1) of 31 top of the second through-hole with third through-hole 41 and third through-hole 41 and second leads to
The second position (as shown in Figure 2) of the corresponding conducting in hole 31；Positioned at third through-hole 41 lower section and piston cylinder 4 and core barrel 2 it
Between be equipped with the runner 7 that is connected with third through-hole 41 and 5 inner cavity of collecting vessel.
It is as shown in Figure 1 and Figure 2: the utility model proposes fluid pressure type downhole sampler 100 be a kind of time opening injection well
Downhole sampler；This sampler uses coiled tubing tripping in, can infuse in poly- tubing string or be sampled in empty well cylinder.Work as sampler
After coiled tubing tripping in target position, driving piston cylinder 4 slides into the second position by initial position, at this point, third through-hole
41 conductings (that is: open inlet opening and be connected to 5 inner cavity of collecting vessel) corresponding with the second through-hole 31 are sampled；After the completion of sampling,
Driving piston cylinder 4 is reset to first position, and third through-hole 41 is staggered with the second about 31 through-hole, feed liquor bore closure, completes sampling.
The sample is collected in target position.
Since during reaching the tripping in predetermined position, fluid pressure type downhole sampler is in close state always, under
The polymer or sundries of other depth locations, therefore polymerization that can accurately to specified sample position will not be entered during entering
Object is sampled, and the parameters such as viscosity of sample are more accurate, and the precision and polymer flooding effect for which thereby enhancing polymer samples analysis are commented
The accuracy of valence.
Further, in the present embodiment, the inner wall of the cylinder body 3 is towards 2 projection single order bench 32 of core barrel；The work
Plug tube 4 includes the flange part 43 of cylinder ontology 42 and cylinder ontology upper end, and the sealing of cylinder ontology 42 is slidably installed in ladder section 32 and center
Between bucket 2, the flange part 43 is located at 32 top of ladder section, and seals and be slidedly arranged between core barrel 2 and cylinder body 3；Flange part 43
Bottom end and ladder section 32 tip contact when for piston cylinder 4 the second position.The bottom of the cylinder body ladder section 32 is to center
Bucket 2 projection, one baffle ring 33, is equipped with a pressure spring 8 between 33 upper surface of baffle ring and 4 lower end surface of piston cylinder；When flange part 43
Bottom end and the top of ladder section 32 there is certain distance, and be the first position of piston cylinder 4 when pressure spring 8 is uncompressed.
In the present embodiment, the initial position of the piston cylinder 4 is identical as its first position；The piston cylinder 4 is in
When initial position, positioned between piston cylinder 4 and cylinder body 3 by shear pin 9.
The first through hole 21 can be arranged multiple along the circumferential direction of core barrel 2；Four are arranged in the present embodiment.
Second through-hole 31 and the third through-hole 41 can be correspondingly arranged respectively along the circumferential direction of cylinder body 3 and piston cylinder 4
It is multipair；Four pairs are arranged in the present embodiment.
Further, on the circumferentially opposed position of second through-hole 31 and third through-hole 41, the inner wall of cylinder body 3 and work
There are gaps appropriate for meeting between the outer wall of plug tube 4, in order to the smooth conducting of second through-hole 31 and third through-hole 41；
Sealing structure is equipped on sliding surface between each component, such as: sealing ring.
The fluid pressure type downhole sampler 100 of the utility model use process is as follows: the upper end of top connection 1 as shown in Figure 1: connects
Connect coiled tubing, after sampler is with coiled tubing tripping in target position, by being suppressed in coiled tubing, pressure fluid via
The first through hole 21 of core barrel 2 enters seal cavity 6, and acts on the top surface of the flange part 43 of piston cylinder 4, and pressure is greater than shearing
The shearing force of pin 9, shear pin 9 are cut, and hydraulic 4 slide downward of power drive piston cylinder, pressure spring 8 is compressed；Work as flange part
When 43 bottom end and the tip contact of ladder section 32, piston cylinder 4 slides into the second position (as shown in Figure 2), at this point, third through-hole
41 conductings corresponding with the second through-hole 31, and be connected to and be sampled with 5 inner cavity of collecting vessel by runner 7；After the completion of sampling, stop connecting
Continuous oil pipe is suppressed, and piston cylinder 4 is reset to first position under the action of pressure spring 8, at this point, on third through-hole 41 and the second through-hole 31
Under be staggered, feed liquor bore closure, sampling process complete.
Further, in the present embodiment, the runner 7 can be the axial ditch being arranged in 2 outside wall surface of core barrel
Slot；It is also possible to the axial groove being arranged on 4 inner wall of piston cylinder；It is either correspondingly arranged at the core barrel simultaneously
Axial groove on 4 inner wall of 2 outside wall surfaces and the piston cylinder.
As another embodiment in present embodiment, what the runner 7 was also possible to radially to be reduced by 2 lower part of core barrel
Outer peripheral surface is constituted.
The installation step of the fluid pressure type downhole sampler of the utility model are as follows: clamping cylinder body 3, successively by pressure spring 8, piston cylinder
The 4 left end loadings from Fig. 1, are screwed into shear pin 9 into the pin hole of piston cylinder, form first assembly；Clamping top connection 1, will
Core barrel 2 and top connection 1 are connected to the screw thread end, and by first assembly, right side is inserted in from Fig. 1, and cylinder body 3 is connect with top connection 1
To the screw thread end.Collecting vessel 5 and cylinder body 3 are connected to the screw thread end, complete assembly.
From the above mentioned, the fluid pressure type downhole sampler of the utility model, for the well sampling of polymer injection well, with continuous
After oil pipe tripping in target position, suppressed in coiled tubing, push piston cylinder be displaced downwardly to the second position, make third through-hole with
The corresponding conducting of second through-hole (open inlet opening and be connected to collecting vessel) is sampled；Stop suppressing after the completion of sampling, piston
For cylinder since spring force is reset to first position, feed liquor bore closure completes sampling；The sample is collected in target position.By
During reaching the tripping in predetermined position, fluid pressure type downhole sampler is in close state always, during tripping in not
Can enter other depth locations polymer or sundries, therefore can the polymer accurately to specified sample position take
Sample, the parameters such as viscosity of sample are more accurate, and it is accurate that the precision and polymer flooding effect for which thereby enhancing polymer samples analysis are evaluated
Degree.
Fashionable holding closed state under the fluid pressure type downhole sampler of the utility model, it is lower to pass through to after specifying sample position
The mode that coiled tubing is suppressed opens sampler, is sampled；Piston cylinder can be made to automatically reset by spring force after sampling；
The fluid pressure type downhole sampler of the utility model uses two-layer pipe, guarantees the sample of underground acquisition not by impurity and non-targeted
Layer substance pollution.
The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model
It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model
Change and modify, should belong to the range of the utility model protection.
Claims (8)
1. a kind of fluid pressure type downhole sampler, which is characterized in that the fluid pressure type downhole sampler include a top connection, it is described on
The lower inner wall of connector is fixedly connected with a core barrel, and the lower part outer wall of the top connection is fixedly connected with cylinder body up and down；Institute
It states sealing between core barrel and cylinder body and is slidably equipped with a piston cylinder；The lower part outer wall of the cylinder body is fixedly connected with a collecting vessel；In
Heart bucket, cylinder body, the bottom surface of top connection and piston cylinder top surface be enclosed a seal cavity, the bucket wall of the core barrel is equipped with
The first through hole being connected to the seal cavity；The cylinder body is equipped with the second through-hole through its side wall, on the piston cylinder
Equipped with the third through-hole for running through its side wall；Second through-hole is corresponding with the circumferential position of third through-hole；Piston cylinder has third
Through-hole is located at the first position above the second through-hole and the second position of third through-hole conducting corresponding with the second through-hole；Positioned at
It the lower section of three through-holes and is equipped between piston cylinder and core barrel and third through-hole and the runner that is connected of collection barrel cavity.
2. fluid pressure type downhole sampler as described in claim 1, which is characterized in that the inner wall of the cylinder body is convex towards core barrel
If single order bench；The piston cylinder includes the flange part of an ontology and cylinder ontology upper end, and the cylinder ontology sealing is slidably installed in ladder
Between section and core barrel, the flange part is located above ladder section, and seals and be slidedly arranged between core barrel and cylinder body；Flange part
The tip contact of bottom end and ladder section is the second position of piston cylinder.
3. fluid pressure type downhole sampler as claimed in claim 2, which is characterized in that the bottom of the cylinder body ladder section is to center
Bucket one baffle ring of projection, is equipped with a pressure spring between the baffle ring upper surface and piston cylinder lower end surface；The bottom end of flange part and rank
The top of bench has certain distance, and is the first position of piston cylinder when pressure spring is uncompressed.
4. fluid pressure type downhole sampler as claimed in claim 3, which is characterized in that the piston cylinder initial position and first
It sets identical；When the piston cylinder is in initial position, positioned between piston cylinder and cylinder body by pin.
5. fluid pressure type downhole sampler as described in claim 1, which is characterized in that the runner is to be arranged in the core barrel
Groove in outside wall surface.
6. fluid pressure type downhole sampler as described in claim 1, which is characterized in that the runner is to be arranged in the piston cylinder
Groove on inner wall.
7. fluid pressure type downhole sampler as described in claim 1, which is characterized in that the runner is to be correspondingly arranged in described
Groove in heart bucket outside wall surface and the piston cylinder inner wall.
8. fluid pressure type downhole sampler as described in claim 1, which is characterized in that the runner is radially contracted by core barrel lower part
Small outer peripheral surface is constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820543502.2U CN208220773U (en) | 2018-04-17 | 2018-04-17 | Fluid pressure type downhole sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820543502.2U CN208220773U (en) | 2018-04-17 | 2018-04-17 | Fluid pressure type downhole sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208220773U true CN208220773U (en) | 2018-12-11 |
Family
ID=64529400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820543502.2U Active CN208220773U (en) | 2018-04-17 | 2018-04-17 | Fluid pressure type downhole sampler |
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| CN (1) | CN208220773U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202465A (en) * | 2021-06-08 | 2021-08-03 | 长春市斯普瑞新技术有限责任公司 | Sliding sleeve closed type underground sampler |
| CN114961718A (en) * | 2022-06-08 | 2022-08-30 | 东营愉沁石油科技有限公司 | Oil field downhole sampler with good sealing performance |
-
2018
- 2018-04-17 CN CN201820543502.2U patent/CN208220773U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202465A (en) * | 2021-06-08 | 2021-08-03 | 长春市斯普瑞新技术有限责任公司 | Sliding sleeve closed type underground sampler |
| CN114961718A (en) * | 2022-06-08 | 2022-08-30 | 东营愉沁石油科技有限公司 | Oil field downhole sampler with good sealing performance |
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