CN108952623B - Equal-density plugging ball delivery device and method - Google Patents
Equal-density plugging ball delivery device and method Download PDFInfo
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- CN108952623B CN108952623B CN201810912554.7A CN201810912554A CN108952623B CN 108952623 B CN108952623 B CN 108952623B CN 201810912554 A CN201810912554 A CN 201810912554A CN 108952623 B CN108952623 B CN 108952623B
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- ball
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The application provides an isopycnic transfers stifled ball delivery device and method, isopycnic transfers stifled ball delivery device to be soluble in water, and it includes: a vertically extending basketball goal, a net cover, and a counterweight head. Have the cavity of holding equal density transfer stifled ball in the basketball goal, seted up on the lateral wall of basketball goal and link up the through-hole of lateral wall, the through-hole with the cavity is linked together, equal density transfer stifled ball is under the non-water condition, can not pass through the through-hole is followed play in the cavity. The net cover and the counterweight head are respectively connected at two ends of the ball basket to prevent the equal-density plugging ball from jumping out of the cavity under the non-water-meeting condition. The device and the method for delivering the equal-density plugging ball can deliver the equal-density plugging ball to a target well section at any injection discharge capacity without the need of pumping by a pump truck or other mechanical delivery tools. The method is simple to operate, can be used for ball throwing of measures such as selective fracturing, water injection well profile control, chemical flooding well selective injection and the like, and is very wide in application.
Description
Technical Field
The application belongs to the technical field of oil exploitation, and particularly relates to an equal-density plugging ball delivery device and method.
Background
The plugging ball can be used for measures such as profile control of a water injection well, selective injection of a chemical flooding well, acidification/fracturing of an injection and production well and the like. The current delivery method of the adjusting and blocking ball mainly adopts a mechanical ball delivery device. For example, the chinese patent application CN106567684A discloses a transferring and delivering device for adjusting and blocking balls, which has large volume and complicated operation, and is not suitable for daily dose less than 20m3And d, ball throwing construction of the water injection well.
Therefore, a new adjusting ball delivery device and method are needed, but no effective solution is available at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an equal-density adjusting and blocking ball delivery device and method, which are simple in ball delivery operation and suitable for construction under any displacement condition.
The specific technical scheme of the invention is as follows:
the invention provides an isopycnic transfer ball delivery device, which is soluble in water and comprises:
the ball basket extends lengthways, a cavity for containing the equal-density adjusting and blocking ball is arranged in the ball basket, a through hole penetrating through the side wall is formed in the side wall of the ball basket, the through hole is communicated with the cavity, and the equal-density adjusting and blocking ball cannot jump out of the cavity through the through hole under the condition of non-water contact;
the net cover and the counterweight head are respectively connected to two ends of the basketball basket so as to prevent the equal-density blocking ball from jumping out of the cavity under the non-water condition;
the thickness H of the net cover in the axial direction is H/10000+ 0.5; wherein h is the thickness of the net cover in the axial direction and is expressed in millimeter; h is expressed as the pitching depth in meters; 0.5 is a correction coefficient.
In a preferred embodiment, a weighting agent is placed within the chamber of the basket, the weighting agent being made from a water-soluble salt.
In a preferred embodiment, the mesh cover has a plurality of through holes formed therethrough in an axial direction of the mesh cover, and the equal-density plugging ball cannot pass through the through holes under a non-water condition.
In a preferred embodiment, the basketball goal, the weight head, and the net cover are all made of polyvinyl alcohol.
In a preferred embodiment, the shape of the through-hole is selected from any one of a rectangle, a square, a circle, a trapezoid, a triangle, a rhombus, a parallelogram, or an irregular shape.
In a preferred embodiment, the net cover is clamped at one end of the basketball hoop, and the counterweight head is in threaded connection with the other end of the basketball hoop.
In addition, the invention also provides a delivery method applying any one of the equal-density plugging ball delivery devices, which comprises the following steps:
placing an equal-density adjusting and blocking ball in a cavity of the ball basket, and connecting the net cover and the counterweight head to two ends of the ball basket;
putting the equal-density plugging ball delivery device into an injection well at a wellhead test valve of the injection well so as to enable the equal-density plugging ball delivery device filled with the equal-density plugging balls to descend to a target position;
the equal-density adjusting and blocking ball delivery device is contacted with injected water for a preset time and then is dissolved, so that the equal-density adjusting and blocking balls are released in the injection well.
In a preferred embodiment, a weighting agent is placed in the chamber of the basket, the weighting agent is made of a water-soluble salt, and the target position is controlled by the thickness of the net cover in the axial direction and the amount of the weighting agent.
In a preferred embodiment, the predetermined time is 6 to 12 hours.
Borrow by above technical scheme, the beneficial effect of this application lies in:
the device and the method for delivering the equal-density plugging ball can deliver the equal-density plugging ball to a target well section under any injection displacement (including the condition that the injection displacement is 0) without the need of pumping by a pump truck or other mechanical delivery tools. The method is simple to operate, can be used for ball throwing of measures such as selective fracturing, water injection well profile control, chemical flooding well selective injection and the like, and is very wide in application.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:
fig. 1 is a schematic structural view of an equal-density ball-adjusting delivery device according to an embodiment of the present application.
Reference numerals of the above figures: 1. a ball basket; 11. a chamber; 12. a through hole; 2. a net cover; 21. a through hole; 3. counterweight head
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Such asFIG. 1 shows a schematic view of aAs shown, the present invention provides an isopycnic transfer ball delivery device, which is soluble in water, comprising: a ball basket 1 extending lengthwise, a net cover 2 and a counterweight head 3. For example, the basketball goal 1, the net cover 2, and the weight head 3 may be made of polyvinyl alcohol.
Have the cavity 11 of holding equal density transfer stifled ball in the basketball goal 1, seted up on the lateral wall of basketball goal 1 and link up the through-hole 12 of lateral wall, through-hole 12 with cavity 11 is linked together, equal density transfer stifled ball under the non-water condition, can not pass through-hole 12 is followed play in the cavity 11. The net cover 2 and the counterweight head 3 are respectively connected to two ends of the basketball goal 1 to prevent the equal-density adjusting ball from jumping out of the cavity 11 under the non-water condition.
In the present embodiment, the basketball goal 1 has a first end and a second end that extend in the longitudinal direction. The first end may be connected to a mesh cover 2 and the second end may be connected to a counterweight head 3. Preferably, the net cover 2 may be fastened to a first end of the basketball goal 1, and the weight head 3 may be screwed to a second end of the basketball goal 1. Of course, the connection mode is not exclusive, and the person skilled in the art can reasonably set the connection mode of the net cover 2 and the counterweight head 3 with the basketball goal 1 according to actual needs.
The chamber 11 of the basketball 1 can contain an equal-density plugging ball, and the sidewall of the basketball 1 can be provided with a through hole 12, and the through hole 12 can penetrate through the sidewall. The through hole 12 can be communicated with the cavity 11, but the equal-density adjusting ball cannot be moved out of the cavity 11 through the through hole 12 under the condition of non-water contact. Therefore, preferably, the shape of the through hole 12 may be selected from any one of a rectangle, a square, a circle, a trapezoid, a triangle, a rhombus, a parallel tetragon, or an irregular shape. When the through-hole 12 is rectangular, the width of the rectangle needs to be smaller than the diameter of the equal-density plugging ball.
In order to ensure the accurate delivery of the equal-density blockage ball delivery device and prevent the influence of buoyancy due to water injection, weighting agents can be further placed in the cavity 11 of the ball basket 1, and the weighting agents can be made of water-soluble salts. Such as sodium chloride, potassium chloride, sodium sulfate, and the like.
In addition, can also guarantee simultaneously that the device can accurately deliver the equal density profile control ball through the different thickness of the net cover 2 in the axial direction. That is, the thickness of the mesh cover 2 in the axial direction is determined by the depth of the well section when the equal density plugging ball is released in the injection well. In a general case, the thickness h of the mesh cover 2 in the axial direction may be: h is H/10000+ 0.5; wherein h is the thickness of the net cover in the axial direction and is expressed in millimeters; h is expressed as the pitching depth in meters; 0.5 is a correction coefficient.
In addition, the net cover 2 may be provided with a plurality of through holes 21 penetrating the axial direction of the net cover 2, and the equal density blocking ball cannot pass through the through holes 21 under the non-water condition. The number and specific shape of the through holes 21 may be set according to actual requirements, and the present application is not limited thereto.
In addition, the invention also provides a delivery method of the equal-density plugging ball, which comprises the following steps:
s1: placing an equal-density adjusting and blocking ball in a cavity 11 of the basketball goal 1, and connecting the net cover 2 and the counterweight head 3 to two ends of the basketball goal 1;
s2: putting the equal-density plugging ball delivery device into an injection well at a wellhead test valve of the injection well so as to enable the equal-density plugging ball delivery device filled with the equal-density plugging balls to descend to a target position;
s3: the equal-density plugging ball delivery device is contacted with injected water for a preset time and then is dissolved, so that the equal-density plugging ball is released in the injection well.
In step S2, before the wellhead test valve of the injection well is put into the injection well, the equal density plugging ball delivery device needs to close the water injection valve, open the pressure relief valve to relieve pressure, then open the test valve again, and close the pressure relief valve. And (3) throwing the ball throwing device provided with the equal-density plugging ball into the injection well from the short interface at the upper part of the test valve, then closing the test valve, opening the main valve, and then opening the water injection valve to recover normal water injection.
In addition, weighting agents can be placed in the cavity 11 of the ball basket 1 to ensure that the equal density blocking ball delivery device can be lowered to a proper well depth position. The weighting agent may be made of a water-soluble salt, and specifically, the target position may be controlled by the thickness of the mesh cover 2 in the axial direction and the amount of the weighting agent. For example, 50 g of weighting agent is needed for basic weighting, and 5 g of weighting agent can be added for every 1000 m of pitching depth. The thickness of the net cover 2 in the axial direction is as described above, and the description thereof is omitted.
The preset time can be 6-12 h
The device and the method for delivering the equal-density plugging ball are applied to the depth of a 2200-meter well on site. The thickness of the net cover is 0.72mm, the weighting amount is 61g, the injected fluid is water, and the density of the water is 0.998g/cm3The density of the equal-density adjusting blocking ball is 0.999-0.997 g/cm3The equal density plugging ball starts to be released at the depth of 1500-1700 meters, and can be completely released at 2000-2100 meters.
The device and the method for delivering the equal-density plugging balls can deliver the equal-density plugging balls to the target well section under any injection discharge capacity of the injection well (including the condition that the injection discharge capacity is 0) without the help of pumping truck pressure or other mechanical delivery tools, so that the movement of the equal-density plugging balls which are delivered into the injection well at the plugging well section is ensured to have autonomy, the equal-density plugging balls are ensured to only plug blastholes at a strong water absorption layer and not plug blastholes at a weak water absorption layer, the true selective plugging is realized, and the effect of changing the longitudinal section of the injection well is achieved. The method is simple to operate, can be used for ball throwing of measures such as selective fracturing, water injection well profile control, chemical flooding well selective injection and the like, and is very wide in application.
It should be noted that any suitable existing configuration may be used for the wellhead test valves and the like provided in the present embodiments. For clearly and briefly explaining the technical solution provided by the present embodiment, the above parts will not be described again, and the drawings attached to the specification are also simplified accordingly. It should be understood, however, that the present embodiments are not limited in scope thereby.
Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.
Claims (9)
1. An isopycnic transfer ball delivery device, wherein the isopycnic transfer ball delivery device is soluble in water, comprising:
the ball basket extends lengthways, a cavity for containing the equal-density adjusting and blocking ball is arranged in the ball basket, a through hole penetrating through the side wall is formed in the side wall of the ball basket, the through hole is communicated with the cavity, and the equal-density adjusting and blocking ball cannot jump out of the cavity through the through hole under the condition of non-water contact;
the net cover and the counterweight head are respectively connected to two ends of the basketball basket so as to prevent the equal-density blocking ball from jumping out of the cavity under the non-water condition;
the thickness H of the net cover in the axial direction is H/10000+ 0.5; wherein h is the thickness of the net cover in the axial direction and is expressed in millimeters; h is expressed as the pitching depth in meters; 0.5 is a correction coefficient.
2. The iso-density modulated ball delivery device of claim 1, wherein a weighting agent is disposed within the chamber of the basketball goal, the weighting agent being made from a water soluble salt.
3. The device according to claim 1, wherein the mesh cover has a plurality of through holes formed therein, the through holes extending in an axial direction of the mesh cover, and the equal-density ball cannot pass through the through holes when it is not in contact with water.
4. The iso-density pitch ball delivery device of claim 1, wherein the basketball goal, the counterweight head, and the mesh cap are made of polyvinyl alcohol.
5. The device for delivering an equal-density ball plug according to claim 1, wherein the shape of the through hole is selected from any one of a rectangle, a square, a circle, a trapezoid, a triangle, a rhombus, a parallelogram, or an irregular shape.
6. The device for delivering an equal-density ball plug according to claim 1, wherein the net cover is clamped at one end of the basketball goal, and the counterweight head is screwed at the other end of the basketball goal.
7. A method of delivering an iso-density tuned mass sphere delivery device according to any of the preceding claims, comprising the steps of:
placing an equal-density adjusting and blocking ball in a cavity of the ball basket, and connecting the net cover and the counterweight head to two ends of the ball basket;
putting the equal-density plugging ball delivery device into an injection well at a wellhead test valve of the injection well so as to enable the equal-density plugging ball delivery device filled with the equal-density plugging balls to descend to a target position;
the equal-density adjusting and blocking ball delivery device is contacted with injected water for a preset time and then is dissolved, so that the equal-density adjusting and blocking ball is released in the injection well.
8. The delivery method according to claim 7, wherein a weighting agent is placed in the chamber of the basketball goal, the weighting agent is made of a water-soluble salt, and the target position is controlled by the thickness of the net cover in the axial direction and the amount of the weighting agent.
9. The delivery method according to claim 7, wherein the predetermined time is 6 to 12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912554.7A CN108952623B (en) | 2018-08-12 | 2018-08-12 | Equal-density plugging ball delivery device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912554.7A CN108952623B (en) | 2018-08-12 | 2018-08-12 | Equal-density plugging ball delivery device and method |
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| Publication Number | Publication Date |
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| CN108952623A CN108952623A (en) | 2018-12-07 |
| CN108952623B true CN108952623B (en) | 2020-09-11 |
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| CN201810912554.7A Active CN108952623B (en) | 2018-08-12 | 2018-08-12 | Equal-density plugging ball delivery device and method |
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| US8567494B2 (en) * | 2005-08-31 | 2013-10-29 | Schlumberger Technology Corporation | Well operating elements comprising a soluble component and methods of use |
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| WO2004031533A2 (en) * | 2002-09-24 | 2004-04-15 | Baker Hughes Incorporated | Downhole ball dropping apparatus |
| CN103342881A (en) * | 2013-07-26 | 2013-10-09 | 四川川庆井下科技有限公司 | Degradable temporary plugging ball and preparation method thereof |
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| CN108952623A (en) | 2018-12-07 |
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