CN108518199B - Mechanical drilling-free grading hoop and use method thereof - Google Patents
Mechanical drilling-free grading hoop and use method thereof Download PDFInfo
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- CN108518199B CN108518199B CN201810458385.4A CN201810458385A CN108518199B CN 108518199 B CN108518199 B CN 108518199B CN 201810458385 A CN201810458385 A CN 201810458385A CN 108518199 B CN108518199 B CN 108518199B
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to the technical field of oilfield cementing tools, in particular to a mechanical drilling-free grading hoop and a use method thereof. The latter comprises the steps of: in the first step, in the half-way well cementation operation, the lower end of a casing string is fixedly connected with an upper joint of a mechanical drilling-free grading hoop. The invention has reasonable and compact structure, realizes the perforation process under the combined action of the dissolvable pressure ball and the wellhead conveying pump by installing the inner sliding sleeve which can relatively move with the fixed sleeve, and then completes the closing Kong Zisuo by the combined action of the slurry replacing rubber plug and the wellhead conveying pump, thereby simplifying the construction operation, avoiding the process of drilling down and removing the rubber plug after well cementation, improving the working efficiency, reducing the production cost, ensuring the integral strength and the sealing effect and improving the working reliability.
Description
Technical Field
The invention relates to the technical field of oilfield cementing tools, in particular to a mechanical drilling-free grading hoop and a use method thereof.
Background
The current classification hoop that uses on the market is in the well cementation in-process, all need bore the inside partial structure of classification hoop in order to realize classification hoop's latus rectum unanimous with the diameter of sheathed tube, but in the in-process of boring the inner structure of classification hoop, can harm the body of classification hoop very easily, cause serious influence to classification hoop's bulk strength and sealed effect, can cause the switch to circulate the hole unreliable moreover, buries very big hidden danger under the well cementation quality of classification hoop, like this extravagant man-hour not only, classification hoop can't continue to use moreover, drilling operation's expense is high.
Disclosure of Invention
The invention provides a mechanical drilling-free classifying hoop and a using method thereof, which overcome the defects of the prior art, can effectively solve the problems that the body of the classifying hoop is easily damaged in the process of drilling the inner structure of the classifying hoop, the integral strength and the sealing effect of the classifying hoop are seriously influenced, the on-off circulation hole is unreliable, and the cementing quality of the classifying hoop is buried with great hidden trouble, so that the working hours are wasted, the classifying hoop cannot be used continuously, and the cost of drilling operation is high.
One of the technical schemes of the invention is realized by the following measures: the utility model provides a mechanical type exempts from to bore classifying collar, including top connection and interior slip sleeve, the fixed sleeve of lower part fixedly connected with of top connection, fixed sleeve's lower extreme fixedly connected with lower clutch, fixed sleeve's upper portion inboard from the top down is equipped with first draw-in groove respectively, second draw-in groove and third draw-in groove, fixed sleeve's middle part is equipped with two at least circulation holes along the circumferencial direction equipartition, fixed sleeve's right side middle part is equipped with the pinhole, interior slip sleeve installs in fixed sleeve, interior slip sleeve's upper portion from the top down is equipped with first jack catch and the second jack catch that can outwards expand respectively at the interval, first jack catch and second jack catch are elasticity jack catch, first jack catch is in the top of first draw-in groove, the second jack catch cooperatees with the second draw-in groove, interior slip sleeve's middle part corresponds the guide way of fixed sleeve pinhole be equipped with vertical direction, interior slip sleeve's lower part is equipped with the circulation hole corresponding with the circulation hole, the circulation hole is located on the circulation hole, distance between circulation hole and the circulation hole equals the distance between first jack catch and the first draw-in groove, fixed sleeve's pin is fixed mounting on the inside in the guide way of fixed sleeve.
The following are further optimizations and/or improvements to one of the above-described inventive solutions:
flanges are arranged on the outer sides of the upper ends of the first clamping jaw and the second clamping jaw, and the thickness of the flange of the first clamping jaw is larger than that of the flange of the second clamping jaw; or/and the distance between the second clamping groove and the third clamping groove is equal to the distance between the first clamping jaw and the second clamping jaw, and the length of the guide groove is greater than the distance between the first clamping jaw and the second clamping groove.
The outer diameter and the inner diameter of the upper joint, the fixed sleeve and the lower joint are kept consistent; or/and the number of the circulation holes and the circulation holes is four to six, and the diameter of the circulation holes is larger than that of the circulation holes.
The upper joint upper portion is equipped with the internal thread, and the lower part of upper joint is equipped with the external screw thread, and fixed sleeve's upper end and lower extreme are equipped with the internal screw thread respectively, and the upper portion of lower joint is equipped with the external screw thread, and the lower part of lower joint is equipped with the internal screw thread, and the lower part of upper joint and fixed sleeve's upper end are in the same place through screw thread fixed connection, and fixed sleeve's lower extreme and lower joint's upper portion are in the same place through screw thread fixed connection.
Sealing rings are respectively arranged between the fixed sleeve and the inner sliding sleeve above and below the flow holes.
The second technical scheme of the invention is realized by the following measures: a method for using a mechanical drilling-free grading hoop comprises the following steps:
in the first step, in the half-way well cementation operation, the lower end of a casing string is fixedly connected with an upper joint of a mechanical drilling-free graded hoop, a packer, a soluble circulating blind plate and a screen pipe string are sequentially and fixedly connected below a lower joint of the mechanical drilling-free graded hoop, then the pipe string is fully put into a well, and when the pipe string is put into a proper depth, the packer is set;
the second step, casting a soluble pressure ball from the wellhead, wherein the diameter of the soluble pressure ball is larger than that of a contracted end face formed by the flange of the first claw, the diameter of the soluble pressure ball is smaller than that of the contracted end face formed by the flange of the second claw, the soluble pressure ball is clamped at the upper end of the first claw, so that the fluid resistance is increased, the delivery capacity and the discharge pressure of the wellhead conveying pump are improved at the moment, the flange of the second claw is forced to be separated from the second clamping groove, the soluble pressure ball pushes the inner sliding sleeve to move downwards, when the flange of the first claw is matched with the first clamping groove, the flange of the first claw is expanded outwards, the contracted end face formed by the flange of the first claw is disappeared, the soluble pressure ball can move downwards continuously through the first claw, and the diameter of the contracted end face formed by the flange of the second claw is larger than that of the soluble pressure ball, and the soluble pressure ball can form a seal with the circulating blind plate when the soluble pressure ball moves downwards to the circulating blind plate, at the moment, a circulating hole of the inner sliding sleeve is overlapped with a circulating hole of the fixed sleeve, namely, when the inner sliding sleeve is matched with the circulating hole of the first clamping sleeve, the first clamping sleeve is free from mechanical drilling, and the self-locking type is realized, and the cementing operation is realized;
and thirdly, when cementing is finished, pressing and replacing slurry, wherein the diameter of the slurry replacing rubber plug is larger than that of the flange forming shrinkage surface of the second claw and is smaller than that of the first claw when the first claw is positioned at the first clamping groove, when the slurry replacing rubber plug moves to the position of the mechanical drilling-free classifying hoop, the flange forming shrinkage end surface of the second claw is smaller than that of the slurry replacing rubber plug, the second claw blocks the slurry replacing rubber plug to move downwards, the outlet pressure of the wellhead conveying pump continues to rise, under the downward acting force of the slurry replacing rubber plug, the slurry replacing rubber plug forces the second claw to move downwards, the flange of the first claw is separated from the first clamping groove, the inner sliding sleeve moves downwards, when the second claw slides to the third clamping groove, the first claw just moves to the position of the second clamping groove, at the moment, the flange of the first claw and the flange of the second claw simultaneously expand outwards, the shrinkage end surface formed by the flange of the second claw disappears, at the moment, the circulation hole of the inner sliding sleeve is staggered with the circulation hole of the fixed sleeve, and well cementation is finished.
The following is a further optimization and/or improvement of the second technical scheme of the invention:
the dissolvable pressure ball is made of magnesium-aluminum alloy, the strength guarantee time is more than 5 hours, and the complete dissolution time is 10 to 15 hours.
The invention has reasonable and compact structure, realizes the perforating process under the combined action of the dissolvable pressure ball and the wellhead conveying pump by installing the inner sliding sleeve which can relatively move with the fixed sleeve, and then completes the closing Kong Zisuo by the combined action of the slurry replacing rubber plug and the wellhead conveying pump, thereby simplifying the construction operation, avoiding the process of drilling down and removing the rubber plug after well cementation, improving the working efficiency, reducing the production cost, ensuring the integral strength and the sealing effect and improving the working reliability.
Drawings
Fig. 1 is a schematic diagram showing a cross-sectional structure in front view of embodiment 1 of the present invention.
Fig. 2 is an enlarged schematic front view of the inner slide sleeve of fig. 1.
Fig. 3 is a schematic diagram of a front view cross-sectional structure of the dissolvable pressure ball pushing the first claw to match with the first clamping groove in embodiment 2 of the present invention.
Fig. 4 is a schematic diagram of a front view cross-sectional structure of the slurry-replacing rubber plug in embodiment 2 of the present invention pushing the second claw to match with the third clamping groove.
The codes in the drawings are respectively: 1 is an upper joint, 2 is a fixed sleeve, 3 is an inner sliding sleeve, 4 is a lower joint, 5 is a first clamping groove, 6 is a second clamping groove, 7 is a third clamping groove, 8 is a circulation hole, 9 is a first clamping jaw, 10 is a second clamping jaw, 11 is a guide groove, 12 is a circulation hole, 13 is a pin, 14 is a flange, 15 is a soluble pressure ball, and 16 is a slurry replacing rubber plug.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The invention is further described below with reference to examples and figures:
example 1: as shown in fig. 1 and 2, the mechanical drill-free grading hoop comprises an upper joint 1 and an inner sliding sleeve 3, wherein the lower part of the upper joint 1 is fixedly connected with a fixed sleeve 2, the lower end of the fixed sleeve 2 is fixedly connected with a lower joint 4, a first clamping groove 5, a second clamping groove 6 and a third clamping groove 7 are respectively arranged at intervals from top to bottom on the inner side of the upper part of the fixed sleeve 2, at least two circulation holes 8 are uniformly distributed in the middle part of the fixed sleeve 2 along the circumferential direction, a pin hole is arranged in the middle part of the right side of the fixed sleeve 2, the inner sliding sleeve 3 is arranged in the fixed sleeve 2, a first clamping jaw 9 and a second clamping jaw 10 which can be outwards expanded are respectively arranged at intervals from top to bottom on the upper part of the inner sliding sleeve 3, the first clamping jaw 9 and the second clamping jaw 10 are elastic clamping jaws, the first clamping jaw 9 is matched with the second clamping groove 6, a guide groove 11 in the vertical direction is arranged at the position of the middle part of the inner sliding sleeve 3 corresponding to the pin hole 2, a circulation hole 12 corresponding to the circulation hole 8 is arranged on the lower part of the inner sliding sleeve 3, the circulation hole 12 is positioned between the circulation hole 12 and the guide hole 8 and the guide hole 13 which is positioned on the inner side of the fixed sleeve 2, and the guide hole 13 is positioned between the first clamping hole and the first clamping jaw 2 and the guide hole 13 is positioned on the inner side of the fixed sleeve 13. Thus, in the initial state, the first claw 9 is tightly attached to the inner wall of the inner sliding sleeve 3, the upper end of the first claw 9 is extruded and contracted to form a contracted end face, when the first claw 9 moves to the first clamping groove 5 and is matched with the first clamping groove 5, the contracted end face formed by the first claw 9 disappears, the second claw 10 is between the second clamping groove 6 and the third clamping groove 7 and is tightly attached to the inner wall of the inner sliding sleeve 3, the upper end of the second claw 10 is extruded and contracted to form a contracted end face, at this time, the circulation hole 8 is overlapped with the circulation hole 12, and when the first claw 9 moves to the second clamping groove 6 and is matched with the second clamping groove 6, the circulation hole 12 is positioned below the circulation hole 8.
Further optimisation and/or modification of example 1 above may be carried out according to practical needs:
as shown in fig. 1 and 2, the outer sides of the upper ends of the first clamping jaw 9 and the second clamping jaw 10 are respectively provided with a flange 14, and the thickness of the flange 14 of the first clamping jaw 9 is larger than that of the flange 14 of the second clamping jaw 10; or/and, the distance between the second clamping groove 6 and the third clamping groove 7 is equal to the distance between the first clamping jaw 9 and the second clamping jaw 10, and the length of the guide groove 11 is larger than the distance between the first clamping jaw 5 and the second clamping groove 6. Thus, the flange 14 can be effectively matched with the first clamping groove 5, the second clamping groove 6 and the third clamping groove 7, so that the axial position of the inner sliding sleeve 3 in different positions of the fixed sleeve 2 is ensured, when the flange 14 is positioned in other positions of the inner sliding sleeve 3, the flange 14 of the first clamping jaw 9 can be effectively contracted to form a contracted end face, the thickness of the flange 14 of the first clamping jaw 9 is larger than that of the flange 14 of the second clamping jaw 10, the diameter of the contracted end face formed by the flange 14 of the first clamping jaw 9 is smaller than that of the contracted end face formed by the flange 14 of the second clamping jaw 10, when the first clamping jaw 9 moves to the position of the second clamping groove 6 and is matched with the second clamping groove 6, the second clamping jaw 9 can be matched with the third clamping groove 7, the firmness between the inner sliding sleeve 3 and the fixed sleeve 2 is further enhanced, at the moment, the circulating hole 12 is positioned below the flowing hole 8, the guiding groove 11 is matched with the pin 13, relative rotation between the inner sliding sleeve 3 and the fixed sleeve 2 can be prevented, and the length of the guiding groove 11 can ensure that the first clamping jaw 9 can move to the position of the second clamping jaw 6.
As shown in fig. 1, the outer diameter and the inner diameter of the upper joint 1, the fixed sleeve 2 and the lower joint 4 are consistent; or/and the number of the circulation holes 12 and the circulation holes 8 is four to six, and the diameter of the circulation holes 12 is larger than the diameter of the circulation holes 8. In this way, the outer diameter and the inner diameter of the upper joint 1, the fixed sleeve 2 and the lower joint 4 are respectively kept consistent, the upper joint can be conveniently connected with a sleeve, the down-hole process in the well is smoother, and the four to six circulation holes 12 and the circulation holes 8 can enable liquid to pass more quickly.
As shown in fig. 1, the upper part of the upper joint 1 is provided with internal threads, the lower part of the upper joint 1 is provided with external threads, the upper end and the lower end of the fixed sleeve 2 are respectively provided with internal threads, the upper part of the lower joint 4 is provided with external threads, the lower part of the lower joint 4 is provided with internal threads, the lower part of the upper joint 1 and the upper end of the fixed sleeve 2 are fixedly connected together through threads, and the lower end of the fixed sleeve 2 and the upper part of the lower joint 4 are fixedly connected together through threads. In this way, the threaded joint of the upper joint 1 and the fixed sleeve 2 is smeared with the threaded sealant, and the threaded joint of the fixed sleeve 2 and the lower joint 4 is smeared with the threaded sealant, so that the sealing effect of the invention can be ensured.
As shown in fig. 1, sealing rings are respectively arranged between the fixed sleeve 2 and the inner sliding sleeve 3 above and below the circulation holes 6. In this way, the sealing ring can ensure the sealing effect of the invention.
Example 2: as shown in fig. 3 and 4, the method for using the mechanical drilling-free grading hoop comprises the following steps:
in the first step, in the half-way well cementation operation, the lower end of a casing string is fixedly connected with an upper joint 1 of a mechanical drilling-free graded hoop, a packer, a soluble circulating blind plate and a screen pipe string are sequentially and fixedly connected below a lower joint 4 of the mechanical drilling-free graded hoop, then the pipe string is fully put into a well, and when the pipe string is put into a proper depth, the packer is set;
secondly, casting a dissolvable pressure ball 15 from a wellhead, wherein the diameter of the dissolvable pressure ball 15 is larger than that of a shrinkage end face formed by a flange 14 of a first claw 9, the diameter of the dissolvable pressure ball 15 is smaller than that of the shrinkage end face formed by a flange 14 of a second claw 10, the dissolvable pressure ball 15 is clamped at the upper end of the first claw 9, so that the fluid resistance is increased, at the moment, the delivery capacity and the discharge pressure of a wellhead conveying pump are increased, the flange 14 of the second claw 10 is forced to be separated from a second clamping groove 6, the dissolvable pressure ball 15 pushes an inner sliding sleeve 3 to move downwards, when the flange 14 of the first claw 9 is matched with the first clamping groove 5, the flange 14 of the first claw 9 expands outwards, the shrinkage end face formed by the flange 14 of the first claw 9 disappears, and the dissolvable pressure ball 15 can continue to move downwards through the first claw 9, and the shrinkage end face diameter formed by the flange 14 of the second claw 10 is larger than that of the dissolvable pressure ball 15, so that the dissolvable pressure ball 15 can move downwards through the second claw 10, when the dissolvable pressure ball 15 moves downwards to a recyclable plate, the recyclable plate is enabled to form a sealing collar 12, namely, the self-locking collar is matched with the first clamping groove 2, the self-locking mechanical drilling-free hole is realized, and the self-locking hole is realized;
thirdly, when cementing is finished, grouting is carried out, the diameter of the grouting rubber plug 16 is larger than that of the flange forming shrinkage surface of the second claw 10 and is smaller than that of the first claw 9 when the first claw 9 is arranged in the first clamping groove 5, when the grouting rubber plug 16 moves to the position of the mechanical drilling-free grading hoop, the grouting rubber plug 16 passes through the position of the first claw 9, the diameter of the shrinkage end face formed by the flange forming the flange of the second claw 10 is smaller than that of the grouting rubber plug 16, the second claw 10 stops the grouting rubber plug 16 from descending, the outlet pressure of a wellhead conveying pump continues to rise, the grouting rubber plug 16 forces the second claw 10 to move downwards under the downward acting force of the grouting rubber plug 16, the flange 14 of the first claw 9 is separated from the first clamping groove 5, the inner sliding sleeve 3 descends, when the second claw 10 slides to the third clamping groove 7, the flange 14 of the first claw 9 just moves to the position of the second clamping groove 6, the flange 14 of the first claw 9 and the flange 14 of the second claw 10 simultaneously expand outwards, the shrinkage end face formed by the flange 14 of the second claw 10 disappears, and the grouting rubber plug 16 passes through the second claw 10 and the inner sliding sleeve 8 is staggered with the fixed through the fixed hole of the inner sliding sleeve 8. According to the requirement, the external diameter of the dissolvable pressure ball 15 is slightly larger than the diameter of the contracted end face formed by the contraction of the second claw 10 by 3-5mm, and the dissolvable circulating blind plate and the dissolvable pressure ball 15 are completely dissolved along with the time, and Hou Ningjie bundles can be drilled down to sweep ash plugs, wash wells and recover oil.
Further optimisation and/or modification of example 2 above may be carried out according to practical needs:
according to the requirement, the dissolvable pressure ball 15 is made of magnesium-aluminum alloy, the strength guarantee time is more than 5 hours, and the complete dissolution time is 10 to 15 hours.
The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (8)
1. The mechanical drilling-free grading hoop comprises an upper joint and an inner sliding sleeve, wherein the lower part of the upper joint is fixedly connected with a fixed sleeve, the lower end of the fixed sleeve is fixedly connected with a lower joint, a first clamping groove, a second clamping groove and a third clamping groove are respectively arranged at intervals from top to bottom on the inner side of the upper part of the fixed sleeve, at least two circulation holes are uniformly distributed in the middle part of the fixed sleeve along the circumferential direction, a pin hole is arranged in the middle part of the right side of the fixed sleeve, the inner sliding sleeve is arranged in the fixed sleeve, a first claw and a second claw which can be outwards expanded are respectively arranged at intervals from top to bottom of the inner sliding sleeve, the first claw and the second claw are elastic claws, the first claw is arranged above the first clamping groove, the second claw is matched with the second clamping groove, a guide groove in the vertical direction is arranged at the middle part of the inner sliding sleeve, circulation holes corresponding to the circulation holes are respectively arranged on the inner side of the fixed sleeve, the circulation holes are positioned above the circulation holes, the distance between the circulation holes and the circulation holes is equal to the distance between the first clamping holes and the first clamping groove and the inner side of the first flange, the first claw is arranged on the first flange, and the second claw is arranged on the inner flange, and the first flange is arranged on the inner flange; or/and the distance between the second clamping groove and the third clamping groove is equal to the distance between the first clamping jaw and the second clamping jaw, and the length of the guide groove is greater than the distance from the first clamping jaw to the second clamping groove;
the mechanical drilling-free classifying hoop comprises the following using steps:
in the first step, in the half-way well cementation operation, the lower end of a casing string is fixedly connected with an upper joint of a mechanical drilling-free graded hoop, a packer, a soluble circulating blind plate and a screen pipe string are sequentially and fixedly connected below a lower joint of the mechanical drilling-free graded hoop, then the pipe string is fully put into a well, and when the pipe string is put into a proper depth, the packer is set;
the second step, casting a soluble pressure ball from the wellhead, wherein the diameter of the soluble pressure ball is larger than that of a contracted end face formed by the flange of the first claw, the diameter of the soluble pressure ball is smaller than that of the contracted end face formed by the flange of the second claw, the soluble pressure ball is clamped at the upper end of the first claw, so that the fluid resistance is increased, the delivery capacity and the discharge pressure of the wellhead conveying pump are improved at the moment, the flange of the second claw is forced to be separated from the second clamping groove, the soluble pressure ball pushes the inner sliding sleeve to move downwards, when the flange of the first claw is matched with the first clamping groove, the flange of the first claw is expanded outwards, the contracted end face formed by the flange of the first claw is disappeared, the soluble pressure ball can move downwards continuously through the first claw, and the diameter of the contracted end face formed by the flange of the second claw is larger than that of the soluble pressure ball, and the soluble pressure ball can form a seal with the circulating blind plate when the soluble pressure ball moves downwards to the circulating blind plate, at the moment, a circulating hole of the inner sliding sleeve is overlapped with a circulating hole of the fixed sleeve, namely, when the inner sliding sleeve is matched with the circulating hole of the first clamping sleeve, the first clamping sleeve is free from mechanical drilling, and the self-locking type is realized, and the cementing operation is realized;
and thirdly, when cementing is finished, pressing and replacing slurry, wherein the diameter of the slurry replacing rubber plug is larger than that of the flange forming shrinkage surface of the second claw and is smaller than that of the first claw when the first claw is positioned at the first clamping groove, when the slurry replacing rubber plug moves to the position of the mechanical drilling-free classifying hoop, the flange forming shrinkage end surface of the second claw is smaller than that of the slurry replacing rubber plug, the second claw blocks the slurry replacing rubber plug to move downwards, the outlet pressure of the wellhead conveying pump continues to rise, under the downward acting force of the slurry replacing rubber plug, the slurry replacing rubber plug forces the second claw to move downwards, the flange of the first claw is separated from the first clamping groove, the inner sliding sleeve moves downwards, when the second claw slides to the third clamping groove, the first claw just moves to the position of the second clamping groove, at the moment, the flange of the first claw and the flange of the second claw simultaneously expand outwards, the shrinkage end surface formed by the flange of the second claw disappears, at the moment, the circulation hole of the inner sliding sleeve is staggered with the circulation hole of the fixed sleeve, and well cementation is finished.
2. The method of claim 1, wherein the dissolvable pressure ball is made of magnesium aluminum alloy, the strength guarantee time is greater than 5 hours, and the complete dissolution time is 10 to 15 hours.
3. The method of using a mechanical drill-free grading collar according to claim 1 or 2, wherein the outer and inner diameters of the upper joint, the fixing sleeve and the lower joint are kept uniform; or/and the number of the circulation holes and the circulation holes is four to six, and the diameter of the circulation holes is larger than that of the circulation holes.
4. The method of using a mechanical drill-free grading collar according to claim 1 or 2, wherein the upper part of the upper joint is provided with internal threads, the lower part of the upper joint is provided with external threads, the upper end and the lower end of the fixing sleeve are respectively provided with internal threads, the upper part of the lower joint is provided with external threads, the lower part of the lower joint is provided with internal threads, the lower part of the upper joint and the upper end of the fixing sleeve are fixedly connected together through threads, and the lower end of the fixing sleeve and the upper part of the lower joint are fixedly connected together through threads.
5. The method of using a mechanical drill-free graded hoop according to claim 3, wherein the upper part of the upper joint is provided with internal threads, the lower part of the upper joint is provided with external threads, the upper end and the lower end of the fixing sleeve are respectively provided with internal threads, the upper part of the lower joint is provided with external threads, the lower part of the lower joint is provided with internal threads, the lower part of the upper joint and the upper end of the fixing sleeve are fixedly connected together through threads, and the lower end of the fixing sleeve and the upper part of the lower joint are fixedly connected together through threads.
6. The method of using a mechanical drill-free classifying collar according to claim 1, 2 or 5, characterized in that sealing rings are installed between the fixed sleeve and the inner sliding sleeve above and below the flow hole, respectively.
7. A method of using a mechanical drill-free graded collar according to claim 3, wherein sealing rings are mounted between the fixed sleeve and the inner sliding sleeve above and below the flow holes, respectively.
8. The method of using a mechanical drill-free graded collar of claim 4, wherein sealing rings are installed between the fixed sleeve and the inner sliding sleeve above and below the flow hole, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810458385.4A CN108518199B (en) | 2018-05-14 | 2018-05-14 | Mechanical drilling-free grading hoop and use method thereof |
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| CN201810458385.4A CN108518199B (en) | 2018-05-14 | 2018-05-14 | Mechanical drilling-free grading hoop and use method thereof |
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| CN114109300B (en) * | 2020-08-31 | 2023-12-22 | 中国石油天然气股份有限公司 | Cementing method of horizontal well |
| CN117605444B (en) * | 2024-01-22 | 2024-04-12 | 西安思坦仪器股份有限公司 | High-temperature intelligent water distributor |
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| CN204140017U (en) * | 2014-10-20 | 2015-02-04 | 新疆华油油气工程有限公司 | A kind of full-bore fracturing valve |
| CN104847325A (en) * | 2015-05-15 | 2015-08-19 | 中国海洋石油总公司 | Infinite-level sectional reconstruction sliding sleeve device triggered by machinery or hydraulic pressure |
| CN106640014A (en) * | 2015-10-30 | 2017-05-10 | 中石化石油工程技术服务有限公司 | Counting type infinite class multi cluster full path sectional fracturing slip sleeve |
| CN107829707A (en) * | 2017-11-21 | 2018-03-23 | 中国石油集团西部钻探工程有限公司 | Drilling liner cementing tail pipe plug assembly |
| CN208380546U (en) * | 2018-05-14 | 2019-01-15 | 中国石油集团西部钻探工程有限公司 | Mechanically exempt to bore sizing collar |
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| CN108518199A (en) | 2018-09-11 |
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