CN221074201U - Layered filling sand control pipe column for highly deviated well - Google Patents

Abstract

The utility model discloses a layered filling sand prevention pipe column of a highly-deviated well, which comprises a pipe column, wherein an in-pipe sealer, a sand supporting leather bowl seal, a filling tool, a production screen pipe and a packer are sequentially arranged on the pipe column from bottom to top, a filling opening is arranged on the filling tool, and the filling opening is inclined outwards and downwards and penetrates through the pipe column; the sand supporting leather bowl seal comprises a leather bowl, wherein the top end of the leather bowl is provided with at least two notch grooves which incline downwards in a rotating array mode through an axle center. The utility model solves the problems of small tool flow area, large resistance and easy puncture of the filling port to a certain extent, reduces the scouring force of sand-carrying fluid on the protective sleeve and the sleeve, and improves the filling success rate. The method has the characteristics of wide application range and strong compatibility, and is suitable for large-scale popularization.

Description

Layered filling sand control pipe column for highly deviated well

Technical Field

The utility model relates to the technical field of underground operation of petroleum exploitation, in particular to a layered filling sand control pipe column of a highly-deviated well.

Background

After the oil well is drilled, the well path passes through a plurality of layers, wherein a plurality of oil layers are arranged, the lower oil layer is generally mined firstly, the upper oil layer is mined after the lower oil layer is mined, or the lower section is mined in the horizontal well, the lower oil layer is gradually returned after the lower oil layer is mined, and the upper oil layer is mined. However, after some oil layers are exploited for a period of time, the yield is reduced, the economic benefit is deteriorated, and a certain amount of residual oil is still not exploited. The upper oil layer is shot, the fracturing sand prevention is improved, the upper oil layer is subjected to closed high-pressure construction in the construction process, but the high pressure cannot be transmitted to the lower layer, the lower layer cannot be influenced, and the upper layer and the lower layer are communicated and simultaneously produced after the construction is finished.

Publication (bulletin) number: CN111042776B discloses an anti-channeling layered filling sand control column and method, the anti-channeling layered filling sand control column comprises a hanging packer, a packing sand control outer column, an isolation bridge type inner filling column and a flushing pipe, wherein the flushing pipe is arranged inside the isolation bridge type inner filling column, the isolation bridge type inner filling column is arranged inside the packing sand control outer column, the upper ends of the packing sand control outer column, the isolation bridge type inner filling column and the flushing pipe are respectively connected with a three-layer pipe at the lower end of the hanging packer, the isolation bridge type inner filling column comprises an isolation pipe, a bridge type inner filling tool and a filling conversion tool which are sequentially connected from top to bottom, and sealing barrels are arranged on the isolation pipe at intervals. The invention solves the problem that the layered filling cannot be normally, safely and reliably implemented due to the formation of cross flow caused by the heterogeneity of the reservoir in the filling construction and the backwashing process of the one-pass pipe column layered filling sand control technology.

The prior art has the problems that the design defect of a filling port is easy to stab and the later closing failure of a filling channel is easy to cause; the problem of poor tightness can be caused after the packing cup at the lower part of the pipe column is extruded by the sleeve in the packing and discharging process; the tool is difficult to back-off after the filling of the deep oil well with large inclination and displacement, and the tool is released and filled after the filling.

Publication (bulletin) number: CN215595555U discloses a downhole sand control tool in oil field oil well workover operation, in particular to a one-trip pipe column clamping and filling integrated device. The structure of the packer comprises a sleeve, a releasing device is fixed inside the sleeve through the packer, a compensator is arranged inside the releasing device, the upper end of the compensator is connected with the tubing through a short circuit, the lower end of the compensator is connected with the upper end of a plug connector through a short circuit, the lower end of the plug connector is connected with a tail pipe, and a steel ball is arranged between the plug connector and the tail pipe. The one-pass pipe column clamping, sealing and filling integrated device is suitable for sand prevention of an oil well in an oil field, sand prevention pipe, clamping, seat sealing and gravel filling operation can be completed by next pipe column entering, the sand prevention operation time of the oil well is shortened, and the oil well yield is increased.

The prior art has the problems that the design defect of a filling port is easy to stab and the later closing failure of a filling channel is easy to cause; the problem of poor tightness can be caused after the packing cup at the lower part of the pipe column is extruded by the sleeve in the packing and running process.

Publication (bulletin) number: CN109869121B discloses a mechanical sand control process of a small cased well, comprising the following steps: ⑴ The sand washing pipe column is lowered, sand washing is carried out after the sand surface is determined, and sand is washed to the bridge plug surface; ⑵ Lifting an oil pipe, re-detecting sand setting, and then preprocessing a stratum; ⑶ Connecting ground pipelines, and performing overall pressure test to be qualified; ⑷ After the well is washed for one week in a positive circulation way, closing a sleeve gate, extruding a pre-fluid into the stratum, adding sand after the pumping pressure is stable, and extruding and filling the stratum; ⑸ Opening a sleeve gate, adding sand again, stopping adding sand when the sand adding amount reaches a preset amount, and continuing to beat the displacement fluid; ⑹ Lifting out the sand washing pipe column; ⑺ The sand control pipe column is arranged under the process of flushing, sand naturally falls down to the periphery of the wire-wound sieve tube after stopping flushing, and a sand blocking well wall is established; ⑻ Releasing the filling releasing tool, and lifting the upper square pipe column out; ⑼ Sending the packer to the underground, inserting the packer into a lower butt joint of a reserved well to lock and seal; ⑽ And pulling out the service string above the packer. The process can be implemented step-by-step with earth fill, wellbore fill, and setting to avoid large-scale tools.

The prior art has the problems that the design defect of a filling port is easy to stab and the later closing failure of a filling channel is easy to cause; the problem of poor tightness can be caused after the packing cup at the lower part of the pipe column is extruded by the sleeve in the packing and running process.

In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the beneficial effects are different from those of the present utility model, and the above disclosed technical documents have no technical teaching for more technical features of the present utility model, the technical problems to be solved and the beneficial effects.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a layered filling sand control pipe column for a highly-deviated well, which solves the problems of small tool overflow area, large resistance and easy puncture of a filling port, reduces the scouring force of sand-carrying fluid on a protective sleeve and a sleeve, and improves the filling success rate.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The layered filling sand prevention pipe column of the highly-deviated well comprises a pipe column, wherein an in-pipe sealer, a sand supporting leather bowl seal, a filling tool, a production screen pipe and a packer are sequentially arranged on the pipe column from bottom to top, a filling opening is arranged on the filling tool, and the filling opening is inclined outwards and penetrates through the pipe column; the sand supporting leather bowl seal comprises a leather bowl, wherein the top end of the leather bowl is provided with at least two notch grooves which incline downwards in a rotating array mode through an axle center.

Further, a signal screen is further arranged on the pipe column, and the signal screen is located between the production screen pipe and the packer.

Further, the packer is a releasing packer.

Further, the inclination angle of the filling port is 40 ° to 60 °.

Further, the inclination angle of the filling port was set to 45 °.

Further, an inner chamfer is machined on the outer portion of the filling opening.

Further, 6 notched grooves are provided, and the inclination angle of the notched grooves is 45 degrees.

Further, the sand discharging device comprises a releasing tool, wherein the releasing tool comprises a wash pipe and a wash pipe ball seat, the wash pipe ball seat is arranged at the bottom of the wash pipe, and a sand outlet is formed in the wash pipe.

Further, the material of the part where the filling port is positioned in the filling tool and the material of the part where the sand outlet of the releasing tool is positioned are carburized steel.

Further, the carburizing steel is 20 carburizing steel.

Compared with the prior art, the utility model has the following beneficial effects:

1. The optimization and upgrading of the mechanical parameters of the filling tool solve the problems of small tool overflow area, large resistance and easy puncture of a filling port to a certain extent, reduce the scouring force of sand-carrying fluid on a protective sleeve and a sleeve, and improve the filling success rate. The method has the characteristics of wide application range and strong compatibility, and is suitable for large-scale popularization.

2. The optimization of the layered filling sand control pipe column of the highly-deviated well solves the problem that the existing filling sand control technology cannot realize single extrusion filling of one layer in multiple oil layers, effectively suppresses filling faults, and has the characteristics of low cost, less investment, high construction quality and the like. Is suitable for sand prevention of loose sandstone oil reservoirs and has wide application prospect.

Drawings

FIG. 1 is a schematic illustration of a layered packing sand control string for a highly deviated well of the present utility model;

FIG. 2 is a schematic diagram of a highly deviated well layered packing sand control tubular string seat in accordance with the present utility model;

FIG. 3 is a schematic diagram of a layered packing sand control string packing configuration of a highly deviated well according to the present utility model;

FIG. 4 is a schematic diagram of a construction of a highly deviated well of a layered packing sand control string of the present utility model in a backwashed condition;

FIG. 5 is a schematic view of the structure of the sand control string of the present utility model after the release tool is pulled out of the sand control string;

FIG. 6 is a schematic illustration of the configuration of a packing port of a layered packing sand control string for a highly deviated well of the present utility model;

FIG. 7 is a schematic diagram of the packing cup of a sand control string for a high inclination well of the present utility model;

In the figure: 1. a tubular column; 2. a filling tool; 201. a filling port; 202. an inner chamfer; 3. releasing the tool; 4. a washpipe ball seat; 5. an in-tube sealer; 6. bowl sealing with sand supporting leather; 601. a leather cup; 602. a slit groove; 7. producing a screen pipe; 8. a signal screen; 9. a packer; 10. and (3) a steel ball.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

Referring to fig. 1 to 7, the present utility model provides a layered packing sand control string for a highly deviated well, which comprises a string 1, a packing tool 2 and a releasing tool 3;

The pipe column 1 is sequentially provided with a sand supporting leather bowl seal 6, an in-pipe sealer 5, a production screen pipe 7, a signal screen 8 and a packer 9 from bottom to top.

The inner wall of the pipe column 1 is provided with a filling tool 2, and the filling tool 2 is positioned between the sand supporting leather bowl seal 6 and the production screen pipe 7.

The signal screen 8 is used for detecting prompts, and the packer 9 is a releasing packer.

The releasing tool 3 is the same as the prior art and mainly comprises a flushing pipe and a flushing pipe ball seat 4, wherein the flushing pipe ball seat 4 is arranged at the bottom of the flushing pipe.

The sand outlet is arranged on the flushing pipe, and a filling port 201 matched with the sand outlet is arranged on the filling tool 2.

The in-line sealer 5 is used to seal the annulus between the washpipe and the tubing when it is being filled.

As shown in fig. 6, in order to solve the problem that the filling port 201 is easy to be broken and to cause the failure of closing the filling channel in the later period, the filling port 201 is inclined downwards outwards and is penetrated, so that an inclined filling channel is formed when the filling port 201 is connected with the filling tool 2 for filling, and the inclination angle of the filling port 201 is between 40 ° and 60 °;

In a more specific preferred embodiment, the inclination angle of the filling port 201 is set to be 45 degrees, and damage caused by that the quartz sand bounces to the filling port 201 after impacting the sleeve is avoided by adopting a 45-degree downward inclined spraying mode.

Then, an inner chamfer 202 is machined on the outer portion of the filling port 201, and the inner chamfer 202 is a 45-degree chamfer, so that the outer port of the filling port 201 is in a bell mouth shape.

Finally, the material of the part where the filling port 201 is arranged in the filling tool 2 and the material of the part where the sand outlet of the releasing tool 3 is arranged are made of 20 carburizing steel, carburizing heat treatment is carried out, the hardness of the material is improved, and the service life of the structure is prolonged.

As shown in fig. 7, the sand supporting leather cup seal 6 includes a leather cup 601, so as to solve the problem that in the process of putting in the sand supporting leather cup seal 6 at the lower part of the pipe column 1, the leather cup 601 is extruded by a sleeve, and the tightness is poor, and at least two notch grooves 602 inclined downwards are arranged at the top end of the leather cup 601 in a rotating array with an axis. Allowing the cup 601 to retract inwardly as it descends in the casing.

Preferably, the number of the notch grooves is 6, and the inclination angle of the notch grooves is 45 degrees.

It should be noted that, the filling tool 2, the releasing tool 3, the in-pipe sealer 5, the sand supporting leather bowl 6, the production screen 7, the signal screen 8 and the packer 9 are all in the prior art, for example, the sand supporting leather bowl 6 may be the bulletin number: CN210239630U is a sand supporting device with a sand supporting device in a packer underground pipe column, and improves the leather cup thereof; the filling tool 2 may be of publication number: the filling slide sleeve in the filling tool string disclosed in CN116398098a improves the flow hole, i.e. the filling port, as will be clear to the person skilled in the art.

The specific carburizing heat treatment process flow for 20 carburizing steel is as follows:

in order to solve the problems of difficult back-off of tools after filling of high-inclination, large-displacement and buried deep oil wells, release is firstly carried out and then filling is carried out, the utility model provides a method for using a sand control string for layered filling of a high-inclination well, which comprises the following steps of:

Firstly, referring to fig. 2, putting a small-diameter matched steel ball 10, wherein the steel ball falls into a flushing pipe ball seat 4, pressing a seat release packer of 2, 4, 6, 8, 10 and 12MPa, pressing to 20MPa, opening a sand supporting leather bowl packer cup, and completing the seat;

secondly, referring to fig. 3, the releasing tool 3 is rotated positively to separate the releasing joint from the packer, and then the releasing tool 3 is lifted to a filling position;

Thirdly, the normal pressing circulation filling sand supporting leather bowl seal 6 enables the leather bowl 601 to bear pressure, and the compressed leather is sealed for filling;

Fourth, referring to fig. 4, lifting the releasing tool 3 up to 2.0m to separate the sand outlet from the filling port 201 for back flushing;

And fifthly, referring to fig. 5, lifting the releasing tool 3 continuously until the releasing tool 3 and the connecting part thereof are lifted out of the well, and completing the large-span multilayer filling.

In summary, through the overall optimization and upgrading of the filling tool seat sealing, the filling channel opening and unsealing processes and the matched tools, the sand prevention construction of seat sealing, back-off releasing and filling channel opening are realized, the problems of non-opening and drill sticking after the past filling construction is finished are thoroughly solved, the accident risk is eliminated from the source, and the sand prevention quality is improved.

The parts themselves which are not discussed in the application and the connection modes of the parts in the application all belong to the known technology in the technical field. The preparation can be directly applied and is not repeated.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The layered filling sand prevention pipe column of the highly-deviated well comprises a pipe column, wherein an in-pipe sealer, a sand supporting leather bowl seal, a filling tool, a production screen pipe and a packer are sequentially arranged on the pipe column from bottom to top;

the sand supporting leather bowl seal comprises a leather bowl, wherein the top end of the leather bowl is provided with at least two notch grooves which incline downwards in a rotating array mode through an axle center.

2. The high slope well stratified packing sand control string as set forth in claim 1 wherein a signal screen is also provided on the string, the signal screen being located between the production screen and the packer.

3. The high slope well stratified packing sand control string of claim 1 wherein the packer is a release packer.

4. The high slope well stratified packing sand control string as set forth in claim 1 wherein the inclination angle of the packing port is 40 ° to 60 °.

5. The high slope well stratified packing sand control string as set forth in claim 1 wherein the inclination angle of the packing port is set at 45 °.

6. The high slope well stratified packing sand control string as set forth in claim 1 wherein said packing port is externally machined with an internal chamfer.

7. The high slope well stratified packing sand control string as set forth in claim 1 wherein 6 of said cut slots are provided, said cut slots being inclined at 45 °.

8. The high slope well layered packing sand control string of claim 1, further comprising a release tool comprising a washpipe and a washpipe ball seat, wherein the washpipe ball seat is arranged at the bottom of the washpipe, and a sand outlet is arranged on the washpipe.

9. The layered packing sand control string of a highly deviated well as set forth in claim 8 wherein the material of the packing port in the packing tool and the sand outlet in the releasing tool is carburized steel.

10. The high slope well stratified packing sand control string as set forth in claim 9 wherein said carburized steel is 20 carburized steel.