CN212614685U

CN212614685U - Sand filling pipe device for simulating fractured reservoir

Info

Publication number: CN212614685U
Application number: CN202021126258.3U
Authority: CN
Inventors: 姚峥; 金发扬; 钱德升; 夏巍
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-02-26
Anticipated expiration: 2030-06-17

Abstract

The utility model discloses a simulation fractured reservoir fill sand pipe device, including outer tube and interior sleeve pipe, interior sleeve pipe is located the outer tube, and outer tube both ends swing joint has the end cover, be provided with on the end cover with the through-hole of the inside intercommunication of outer tube, fill the gravel that has different mesh numbers in the annular gap between interior sleeve pipe and the outer tube respectively, be provided with the through-hole on the interior sleeve pipe wall and be used for displacement fluid to circulate, a serial communication port, be provided with the sand control net on the interior sleeve pipe wall, the mesh number of sand control net is less than the mesh number of gravel for interior sleeve pipe inside and outside displacement fluid can circulate and the gravel separates completely. The utility model discloses an interior sleeve pipe mainly plays the supporting role, and the sand control net of its outer wall plays the separation effect for the hole of interior sleeve pipe outer wall does not have the restriction, is convenient for make, moreover because sand control net itself is dense network structure, and it intercepts the grit effectual, can separate the inside and outside grit of endotheca pipe well, avoids scurrying each other.

Description

Sand filling pipe device for simulating fractured reservoir

Technical Field

The utility model belongs to the technical field of the indoor analog device of oil reservoir exploitation, especially a sand pack pipe device of simulation fractured reservoir.

Background

In the research of the development process of oil and gas fields, reservoir seepage parameters, dynamic change process, damage mechanism and the like need to be researched through a large number of indoor simulation experiments. The existing indoor simulation devices have various types, wherein the sand filling pipe is widely applied due to simplicity, convenience and reusability, but equipment improvement is usually required for specific oil reservoirs in a targeted manner. At present, the ascertained fractured oil and gas reservoir reserves are rich and widely distributed and are main resources in the future of the petroleum industry, but the water channeling rule of the fractured oil reservoir is not clear, and experimental equipment for related research is still under development and perfection.

Chinese application patent CN201621080990.5 discloses a novel sand-packed pipe assembly for simulating fractured reservoirs, which is characterized in that a thin and thin cylinder is arranged in a sand-packed compaction cylinder to be used as a simulated fractured reservoir, the thin and thin cylinder is filled with sands with different thicknesses inside and outside, when in use, the inside and outside fluids are required to be communicated, and the sands need to be separated, which requires that the outer wall of the thin and thin cylinder needs to be provided with holes small enough to prevent the fine sands from passing through, the small holes are difficult to manufacture at the moment, the fine sands outside the thin and thin cylinder can be mixed into the thin and thin cylinder in the sand-packed process, the performance of the coarse sands in the thin and thin cylinder is affected, namely the performance of the simulated fractures, and the accuracy of experimental conclusions is finally affected.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to provide a sand pack pipe device of simulation fractured reservoir, the utility model discloses at mould inner tube outer wall parcel one deck sand control net, ensure that the intraductal outer liquid of endotheca can link up and the grit separates completely.

For solving above technical problem, the utility model provides a technical scheme is a sand filling pipe device of simulation fissures oil reservoir, including outer tube and interior sleeve pipe, interior sleeve pipe is arranged in the outer tube, and outer tube both ends swing joint has the end cover, is provided with the through-hole with the inside intercommunication of outer tube on the end cover, and it has the grit of different mesh numbers to fill respectively in the annular gap between interior sleeve pipe, interior sleeve pipe and the outer tube, is provided with the through-hole on the inner tube wall and is used for displacement fluid circulation, its characterized in that, be provided with sand control net on the inner tube wall, sand control net's mesh number is less than the mesh number of grit for interior sleeve pipe inside and outside displacement fluid can communicate and the grit is separated completely.

According to the utility model relates to a simulation fractured reservoir fill sand pipe device's a preferred embodiment, interior sleeve pipe is fixed in the outer tube through the support ring.

According to the utility model relates to a further embodiment of the sand-packed pipe device of simulation fractured reservoir, the outer wall of interior sleeve pipe one end through a supporting beam with support ring inner wall connection, the support ring outer wall with outer tube inner wall clearance fit.

According to the utility model relates to a further embodiment of the sand filling pipe device of simulation fractured reservoir, the support ring outer wall exist at least one with the outer tube inner wall is parallel, both can laminate well after the support ring embolias the outer tube for the support ring can longitudinal movement and can not control and rock.

According to the utility model relates to a simulation fractured reservoir fill sand pipe device's a further embodiment, interior sleeve pipe both ends with be provided with the filter screen between the end cover, according to the displacement fluid flow direction, lie in outer tube liquid inflow end and set up the filter screen and cause the jam in the through-hole that gravel got into the end cover when mainly preventing to fill out sand, lie in outer tube liquid outflow end and set up the filter screen and mainly prevent that gravel migration gets into the through-hole of end cover when displacing and cause the jam.

According to the utility model relates to a further embodiment of the sand-packed pipe device of simulation fractured reservoir, the outer tube goes out the liquid end and is provided with the internal thread and still is provided with the clamping ring between this end cover and the filter screen for compress tightly the filter screen.

According to the utility model relates to a simulation fractured reservoir fill sand pipe device's a further embodiment, the clamping ring inner ring is regular polygon, is convenient for screw with the specialized tool cooperation.

The utility model discloses one of them embodiment's beneficial effect is:

the utility model discloses an interior sleeve pipe mainly plays the supporting role, and the sand control net of its outer wall plays the separation effect for the hole of interior sleeve pipe outer wall does not have the restriction, is convenient for make, moreover because sand control net itself is dense network structure, and it intercepts the grit effectual, can separate the inside and outside grit of endotheca pipe well, avoids scurrying each other. Simultaneously the utility model discloses a clamping ring compresses tightly the filter screen, and the filter screen contacts with the grit and compresses tightly, has both avoided the filter screen not to compress tightly and has carried the grit migration easily and pass the filter screen and block up the end cover through-hole when being in loose situation, also avoids compressing tightly the filter screen through the end cover and leads to the installation difficulty.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the inner sleeve structure of the present invention;

FIG. 3 is a schematic view of the structure of the pressure ring of the present invention;

in the figure, 1, an outer sleeve; 2. an end cap; 3. a filter screen; 4. an inner sleeve; 5. pressing a ring; 6. a support ring; 7. a sand control net; 61. and supporting the beam.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Referring to fig. 1, fig. 2, the utility model provides a technical scheme is a sand pack pipe device of simulation fractured reservoir, including outer tube 1, the equal swing joint in outer tube 1 both ends has end cover 2, is provided with the through-hole with the inside intercommunication of outer tube 1 on the end cover 2 for the circulation of displacement fluid. From displacement fluid inflow end to exit end in the outer tube 1 has set gradually filter screen 3, interior sleeve pipe 4, filter screen 3 and clamping ring 5, interior sleeve pipe 4 is close to the outer wall of displacement fluid entry end and is fixed in outer tube 1 through support ring 6, particularly, interior sleeve pipe 4 cover is located in support ring 6 and its outer wall through 4 supporting beam 61 and 6 inner wall fixed connection of support ring, the outer wall and the 1 inner wall of outer tube of support ring 6 are parallel, both clearance fit for support ring 6 can not rock along 1 longitudinal movement of outer tube. The interior sleeve pipe 4 intussuseption is filled with coarse grit for simulate fractured reservoir, and the annular gap between interior sleeve pipe 4 and the outer tube 1 is filled with fine grit, and interior sleeve pipe 4 outer wall is provided with the through-hole and is used for the displacement fluid circulation, and interior sleeve pipe 4 outer wall parcel has sand control net 7, and sand control net 7's mesh number is less than the mesh number of fine grit, can separate the inside and outside grit of interior sleeve pipe 4 completely and can not scurry each other. The compression ring 5 is in threaded connection with the inner wall of the outer sleeve 1 and is used for compressing the filter screen 3, so that the filter screen 1 is prevented from being loose, and partial gravel is transported to block the through hole of the end cover 2 during displacement. The inner ring of the compression ring 5 is in a regular hexagon shape, so that the compression ring can be conveniently matched and screwed with a special tool.

When the utility model is installed, firstly, the outer wall of the inner sleeve is wrapped with the sand control net, and an end cover is connected with the outer sleeve; then, putting the filter screen and the inner sleeve into the outer sleeve; and then filling fine gravel between the inner sleeve and the outer sleeve, filling coarse gravel in the inner sleeve, finally putting the filter screen into the outer sleeve, screwing the filter screen into the compression ring for compression, and finally installing the rest end cover.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a simulation fractured reservoir's sand pack pipe device, includes outer tube and interior sleeve pipe, interior sleeve pipe is located the outer tube, and outer tube both ends swing joint has the end cover, is provided with the through-hole with the inside intercommunication of outer tube on the end cover, and it has the grit of different mesh numbers to fill respectively in the annular gap between interior sleeve pipe and the outer tube, is provided with the through-hole on the interior sleeve pipe wall and is used for displacement fluid circulation, its characterized in that, be provided with sand control net on the interior sleeve pipe wall, sand control net's mesh number is less than the mesh number of grit for interior sleeve pipe inside and outside displacement fluid can circulate and the grit separates completely.

2. The sand-packing tube device for simulating a fractured reservoir of claim 1, wherein the inner sleeve is fixed in the outer sleeve through a support ring.

3. The sand-filling pipe device for simulating fractured reservoirs according to claim 2, wherein the outer wall of one end of the inner sleeve is connected with the inner wall of the support ring through a support beam, and the outer wall of the support ring is in clearance fit with the inner wall of the outer sleeve.

4. The sand filling pipe device for simulating a fractured reservoir according to claim 3, wherein at least one surface of the outer wall of the support ring is parallel to the inner wall of the outer sleeve, and the support ring and the outer sleeve can be well attached after being sleeved with the outer sleeve, so that the support ring can move longitudinally without shaking left and right.

5. The sand-filling pipe device for simulating fractured reservoirs according to claim 1, wherein a filter screen is arranged between the two ends of the inner sleeve and the end covers.

6. The sand filling pipe device for simulating fractured reservoirs according to claim 5, wherein a compression ring is arranged between the end cover at the liquid outlet end of the outer sleeve and the filter screen, and the compression ring is in threaded connection with the inner wall of the outer sleeve and is used for compressing the filter screen.

7. The sand-filled pipe device for simulating a fractured reservoir of claim 6, wherein the inner ring of the compression ring is a regular polygon, so that the compression ring can be screwed tightly by matching with a special tool.