CN105840135A - Production tubing - Google Patents
Production tubing Download PDFInfo
- Publication number
- CN105840135A CN105840135A CN201610358948.3A CN201610358948A CN105840135A CN 105840135 A CN105840135 A CN 105840135A CN 201610358948 A CN201610358948 A CN 201610358948A CN 105840135 A CN105840135 A CN 105840135A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- sliding sleeve
- hypomere
- upper sliding
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract description 28
- 238000010168 coupling process Methods 0.000 claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 claims abstract description 28
- 238000007667 floating Methods 0.000 claims abstract description 28
- 238000010008 shearing Methods 0.000 claims abstract description 24
- 230000003247 decreasing effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 14
- 230000004323 axial length Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 2
- 239000012530 fluid Substances 0.000 description 26
- 238000005553 drilling Methods 0.000 description 22
- 238000005299 abrasion Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002788 crimping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a production tubing which comprises a sleeve, wherein the horizontal segment of the sleeve is provided with two floating couplings, wherein each floating coupling comprises a shell, a fixed sleeve, an upper sliding sleeve and a lower sliding sleeve; the upper sliding sleeve consists of a communication part and a shearing part; the shearing part is supported on the upper segment of the inner wall of the fixed sleeve by virtue of an upper shearing nail; the lower sliding sleeve is supported on the lower segment of the inner wall of the fixed sleeve by virtue of a lower shearing nail; the communication part is arranged in the lower sliding sleeve; the communication part is provided with a leakage flow hole; the upper end surface of the shearing part is provided with a steady flow groove; the groove width of the steady flow groove decreases progressively and upwards along the axial direction of the shearing part. The sleeve is additionally provided with multiple floating couplings, the sleeve is filled with air; since the sleeve positioned below the floating couplings is filled with air, after the sleeve enters a horizontal well section, gravity applied to the horizontal well wall is alleviated, friction between the sleeve and the well wall decreases, and the thrust pushing the sleeve to move forward is decreased, so that production tubing is beneficial to improvement on the cementing quality of the horizontal section and capable of favorably feeding the sleeve to a design position.
Description
Technical field
The present invention relates to field of petroleum exploitation, specifically refer to a kind of flow string.
Background technology
The feature of extended horizontal well completion is High angle, long open hole, hold angle well segment length, in the case of hole angle is higher, casing string is close to the lower borehole wall, enter horizontal segment rear enclosure tubing string can be attached to completely on the lower borehole wall, now casing string is the longest with the contact-segment on stratum, casing string then bears a heavy burden and lies on the horizontal segment borehole wall, stratum is the biggest to the frictional resistance of casing string, even can not be lower to shaft bottom by deadweight, need pressurization ability slide downward, and easily lead to casing string flexing, even it is likely to cause casing string to be stuck in the bending section of well because rigid casing is very big and cannot enter down.Casing string is big due to the frictional resistance being subject to, and casing string tends not to the most lower to precalculated position, is delayed construction speed, affects follow-up oil recovery effect, even cause the serious consequence that well is scrapped.
Summary of the invention
It is an object of the invention to provide a kind of flow string, can enough make screen casing post transfer to design attitude smoothly, reduce sleeve pipe and moving horizontally the abrasion of process.
The purpose of the present invention is achieved through the following technical solutions:
A kind of flow string, including the sleeve pipe being placed in well, the horizontal segment of described sleeve pipe is provided with two floating couplings, described floating coupling includes housing, fixing sleeve, upper sliding sleeve and low sleeve, fixing sleeve is fixed on inner walls epimere, upper sliding sleeve is made up of the cut part that interconnective interconnecting part and external diameter are identical with housing inner diameter, cut part is arranged on fixing sleeve epimere inwall by upper shearing nail, low sleeve is supported on fixing sleeve lining hypomere by down cut nail, described interconnecting part is placed in low sleeve, and on interconnecting part, have discharge orifice, when upper shearing nail is not cut off, discharge orifice is sealed by low sleeve, when upper shearing nail is cut off, upper sliding sleeve moves along housing axis direction, until upper sliding sleeve upper space connects with low sleeve lower space；The stable chute of annular is had in upper surface, described cut part, the curved shape of bottom land concave downward of described stable chute, and groove width the successively decreasing axially upwards along cut part of stable chute, also include multiple ball, circumferential groove is had at described low sleeve hypomere, multiple balls rotate and are arranged on the outer wall of described cannelure, and described ball contacts with inner walls.
For in prior art, technique is easily caused below the tubing string of the horizontal well completion of big displacement casing string flexing, even it is likely to cause casing string to be stuck in the bending section of well because rigid casing is very big and cannot enter down, inventor is by adding multiple floating coupling on sleeve pipe, make the not drilling fluid charge of the sleeve pipe between two floating couplings, remain full of air, drilling fluid is filled in sleeve pipe more than floating coupling, it is full of air owing to being positioned at the sleeve pipe of below floating coupling, after this section of sleeve pipe enters net horizontal section, the gravity acting on the horizontal borehole wall alleviates, frictional force between sleeve pipe and the borehole wall reduces therewith, the thrust promoting sleeve pipe to move ahead also reduces, thus help the section of improving the standard cementing quality, be conducive under sleeve pipe to design attitude；To after design attitude under sleeve pipe, when needs cementing, have only to from well head to the design load that builds the pressure in sleeve pipe, upper shearing nail on fixing sleeve lining is cut off, upper sliding sleeve is descending, discharge orifice moves the interior bottom of low sleeve, and at this moment the liquid in sleeve pipe more than floating coupling enters in setting of casing from discharge orifice, thus realizes the free-flowing of whole casing string internal channel fluid.
Wherein upper sliding sleeve is made up of with interconnecting part cut part, cut part is arranged on the epimere inwall of fixing sleeve, and fix sleeve and be fixed in inner walls, when drilling fluid is directly impacted to cut part by epimere sleeve pipe, upper surface, cut part by instantaneous impulse affected bigger, and the applied stress skewness that this instantaneous impulse produces, i.e. it is easily caused upper surface, cut part and stress raisers occur, and upper nail of shearing there will be more significantly burr because of unbalance stress after cutting off, inner walls can be caused serious cut with upper sliding sleeve when this burr can move, and then weaken the floating coupling airtight performance to sleeve pipe, the air in sleeve pipe is caused to leak, casing string cannot be met during lower section, alleviate the function of deadweight；The present invention by inner walls by shear nail be provided with fixing sleeve, avoid on housing, offer the installing hole shearing nail, maintain the sealing integrity of housing, on the upper surface of cut part, have annular constant-current groove simultaneously, and the curved shape of bottom land concave downward of stable chute, and groove width the successively decreasing axially upwards along cut part of stable chute, make drilling fluid by sleeve pipe enter in upper sliding sleeve time, it is applied directly to the drilling fluid on the end face of cut part can circulate by stable chute annularly, the applied stress that local on upper surface, cut part is produced by thump is shared to whole end face, make cut part section of formation rule when separating with enclosure interior, obvious burr and crimping will not be produced, reduce when later stage upper sliding sleeve moves in the lump with low sleeve and wear and tear to produced by internal surface of sleeve pipe；And, after drilling fluid flows into stable chute, after it is altered course by the depression of circular arc bottom stable chute, drilling fluid begins to move up, and the successively decreasing axially upwards along cut part of the vertical interval between the two side of stable chute, i.e. reversely the drilling fluid of movement constantly can rebound on stable chute sidewall, radially produces certain applied stress in cut part simultaneously, and this applied stress to shear the impact followed closely negligible on upper.
And when after upper sliding sleeve is all sheared with low sleeve with drilling fluid overlap in-pipe time, the low sleeve playing guide function comes in contact once with internal surface of sleeve pipe, and the external diameter of circumferential groove is less than housing inner diameter, ball contacts with inner walls, the friction type of the mobile generation between low sleeve and inner walls and internal surface of sleeve pipe is become rolling friction from sliding friction, greatly reduce both mutual abrasions, in being the most also avoided that sleeve pipe there is deviation radially in low sleeve in moving process, it is ensured that low sleeve and upper sliding sleeve moving freely in sleeve pipe.
Being provided with sealing ring on the sidewall of described upper sliding sleeve hypomere, described sealing ring realizes the sealing between upper sliding sleeve hypomere and low sleeve hypomere inwall.The sealing ring installed can ensure that the space between two floating couplings adjacent during the lower section of casing string is seamless, utilize the density contrast between air and well eye fluids, realize alleviating the purpose of casing string deadweight, to facilitate casing string movement on net horizontal section.
Gap is left between described low sleeve hypomere external diameter and lower housing section inwall.After building the pressure in casing string, drill-in fluid drives plug to force upper sliding sleeve at set in-pipe together with low sleeve, for reducing upper sliding sleeve and low sleeve abrasion on internal surface of sleeve pipe further, it is provided with gap between low sleeve hypomere external diameter and lower housing section inwall, the hypomere of low sleeve plays guide function in sleeve pipe simultaneously, the two ends of housing arrange external screw thread and are connected with casing threads, now, annular space between low sleeve hypomere outer wall and internal surface of sleeve pipe, even if the radial missing that i.e. low sleeve is certain with the upper sliding sleeve mobile generation in sleeve pipe, also it is not result between its end and internal surface of sleeve pipe being formed serious abrasion, ensure that low sleeve moves forward under the promotion of plug smoothly with upper sliding sleeve.
The groove depth of described stable chute is 0.7 ~ 0.8 times of described cut part axial length.Be arranged on the stable chute on upper surface, cut part can not only balanced drilling liquid to the impact effect of each point on upper surface, cut part, moreover it is possible to weaken cut part fracture strength, i.e. build the pressure reach standard value after can quickly realize shear；As preferably, the groove depth of stable chute is set to 0.7 ~ 0.8 times of cut part axial length so that cut part, on the premise of ensureing that interconnecting part is stably supported by it, reduces the fracture strength of cut part simultaneously, facilitates the THE ADIABATIC SHEAR IN of upper sliding sleeve.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, to after design attitude under middle sleeve of the present invention, when needs cementing, have only to from well head to the design load that builds the pressure in sleeve pipe, upper shearing nail in fixing inner walls is cut off, upper sliding sleeve is descending, discharge orifice moves the interior bottom of low sleeve, and at this moment the liquid in sleeve pipe more than floating coupling enters in setting of casing from discharge orifice, thus realizes the free-flowing of whole bunch tube internal channel fluid；
2, the present invention has annular constant-current groove on the upper surface of cut part, and the curved shape of bottom land concave downward of stable chute, and groove width the successively decreasing axially upwards along cut part of stable chute, make drilling fluid by sleeve pipe enter in upper sliding sleeve time, it is applied directly to the drilling fluid on the end face of cut part can circulate by stable chute annularly, the applied stress that local on upper surface, cut part is produced by thump is shared to whole end face, make cut part section of formation rule when separating with enclosure interior, obvious burr and crimping will not be produced, reduce when later stage upper sliding sleeve moves in the lump with low sleeve and wear and tear to produced by internal surface of sleeve pipe；
3, the present invention is provided with gap between low sleeve hypomere external diameter and lower housing section inwall, the hypomere of low sleeve plays guide function in sleeve pipe simultaneously, the two ends of housing arrange external screw thread and are connected with casing threads, now, annular space between low sleeve hypomere outer wall and internal surface of sleeve pipe, even if the radial missing that i.e. low sleeve is certain with the upper sliding sleeve mobile generation in sleeve pipe, also it is not result between its end and internal surface of sleeve pipe being formed serious abrasion, it is ensured that low sleeve moves forward under the promotion of plug smoothly with upper sliding sleeve.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the structural representation of floating coupling.
Labelling and corresponding parts title in accompanying drawing:
Shear nail on 1-sleeve pipe, 2-well, 3-floating coupling, 31-housing, 32-upper sliding sleeve, 33-stable chute, 34-, 35-discharge orifice, 36-sealing ring, 37-down cut nail, 38-low sleeve, 39-circumferential groove, 310-ball, 311-fix sleeve.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1
nullAs depicted in figs. 1 and 2，The present embodiment includes the sleeve pipe 1 being placed in well 2，The horizontal segment of described sleeve pipe 1 is provided with two floating couplings 3，Described floating coupling 3 includes housing 31、Fixing sleeve 311、Upper sliding sleeve 32 and low sleeve 38，Fixing sleeve 311 is fixed on housing 31 inwall epimere by upper nail 34 of shearing，Upper sliding sleeve 32 is made up of the cut part that interconnective interconnecting part is identical with housing 1 internal diameter with external diameter，Cut part is arranged on fixing sleeve 311 epimere inwall，Low sleeve 38 is supported on fixing sleeve 311 inwall hypomere by down cut nail 37，Low sleeve 38 is supported on housing 31 inwall hypomere by down cut nail 37，Described interconnecting part is placed in low sleeve 38，And on interconnecting part, have discharge orifice 35，When upper shearing nail 34 is not cut off，Discharge orifice 35 is sealed by low sleeve 38，When upper shearing nail 34 is cut off，Upper sliding sleeve 32 moves along housing 31 axis direction，Until upper sliding sleeve 32 upper space connects with low sleeve 38 lower space；The stable chute 33 of annular is had in upper surface, described cut part, the curved shape of bottom land concave downward of described stable chute 33, and groove width the successively decreasing axially upwards along cut part of stable chute 33, also include multiple ball 310, circumferential groove 39 is had at described low sleeve 38 hypomere, multiple balls 310 rotate and are arranged on the outer wall of described cannelure 39, and described ball 310 and housing 31 contact internal walls.
For in prior art, technique is easily caused below the tubing string of the horizontal well completion of big displacement sleeve pipe 1 post flexing, even it is likely to cause sleeve pipe 1 post to be stuck in the bending section of well 2 because sleeve pipe 1 rigidity is very big and cannot enter down, inventor is by adding multiple floating coupling 3 on sleeve pipe 1, make the sleeve pipe 1 not drilling fluid charge between two floating couplings 3, remain full of air, drilling fluid is filled in the sleeve pipe 1 of floating coupling more than 3, it is full of air owing to being positioned at the sleeve pipe 1 of floating coupling less than 3, after this section of sleeve pipe 1 enters net horizontal section, the gravity acting on the horizontal borehole wall alleviates, frictional force between sleeve pipe 1 and the borehole wall reduces therewith, the thrust promoting sleeve pipe 1 to move ahead also reduces, thus help the section of improving the standard cementing quality, sleeve pipe is conducive to arrive design attitude 1 time；Sleeve pipe 1 time is to after design attitude, when needs cementing, have only to from well head to the design load that builds the pressure in sleeve pipe 1, upper shearing nail 34 on fixing housing 31 inwall is cut off, upper sliding sleeve 32 is descending, discharge orifice 35 moves the interior bottom of low sleeve 38, and at this moment the liquid in the sleeve pipe 1 of floating coupling more than 3 enters in setting of casing 1 from discharge orifice 35, thus realizes the free-flowing of whole sleeve pipe 1 post internal channel fluid.
Wherein upper sliding sleeve 32 is made up of with interconnecting part cut part, cut part is connected with housing 31 inwall by upper nail 34 of shearing, when drilling fluid is directly impacted to cut part by epimere sleeve pipe 1, upper surface, cut part by instantaneous impulse affected bigger, and the applied stress skewness that this instantaneous impulse produces, i.e. it is easily caused upper surface, cut part and stress raisers occur, and upper nail 34 of shearing there will be more significantly burr because of unbalance stress after cutting off, housing 31 inwall can be caused serious cut when this burr can move with upper sliding sleeve 32, and then weaken the floating coupling 3 airtight performance to sleeve pipe 1, the air in sleeve pipe 1 is caused to leak, sleeve pipe 1 post cannot be met during lower section, alleviate the function of deadweight；nullThe present embodiment is provided with fixing sleeve 311 by shearing nail 34 on passing through on housing 31 inwall，Avoid on housing 31, offer the installing hole shearing nail，Maintain the sealing integrity of housing 31，On the upper surface of cut part, have annular constant-current groove 33 simultaneously，And the curved shape of bottom land concave downward of stable chute 33，And groove width the successively decreasing axially upwards along cut part of stable chute 33，Make drilling fluid by sleeve pipe 1 enter in upper sliding sleeve 32 time，It is applied directly to the drilling fluid on the end face of cut part can circulate by stable chute 33 annularly，The applied stress that local on upper surface, cut part is produced by thump is shared to whole end face，Make cut part with the section of formation rule when separating inside housing 31，Obvious burr and crimping will not be produced，Reduce when later stage upper sliding sleeve 32 moves in the lump with low sleeve 38 and wear and tear to produced by sleeve pipe 1 inwall；And, after drilling fluid flows into stable chute 33, after it is altered course by the depression of circular arc bottom stable chute 33, drilling fluid begins to move up, and the successively decreasing axially upwards along cut part of the vertical interval between the two side of stable chute 33, i.e. reversely the drilling fluid of movement constantly can rebound on stable chute 33 sidewall, radially produces certain applied stress in cut part simultaneously, and this applied stress on upper shear follow closely 34 impact negligible.By the fixing sleeve 311 arranged, housing 31 inwall, in the movement within housing 34, all will not be caused scuffing, extend the service life of floating coupling 3 by upper nail 34 and the down cut nail 38 sheared.
And when moving in sleeve pipe 1 with drilling fluid after upper sliding sleeve 32 is all sheared with low sleeve 38, the low sleeve 38 playing guide function comes in contact once with sleeve pipe 1 inwall, and the external diameter of circumferential groove 39 is less than housing 31 internal diameter, ball 310 and housing 31 contact internal walls, the friction type of the mobile generation between low sleeve 38 and housing 31 inwall and sleeve pipe 1 inwall is become rolling friction from sliding friction, greatly reduce both mutual abrasions, in being the most also avoided that sleeve pipe 1 there is deviation radially in low sleeve 38 in moving process, ensure low sleeve 38 and upper sliding sleeve 32 moving freely in sleeve pipe.
Being provided with sealing ring 36 on the sidewall of described upper sliding sleeve 32 hypomere, described sealing ring 36 realizes the sealing between upper sliding sleeve 32 hypomere and low sleeve 38 hypomere inwall.The sealing ring 36 installed can ensure that the space between two floating couplings 3 adjacent during the lower section of sleeve pipe 1 post is seamless, utilize the density contrast between liquid in air and well 2, realize alleviating the purpose of sleeve pipe 1 post deadweight, to facilitate the movement on net horizontal section of sleeve pipe 1 post.
In the present embodiment, after building the pressure in sleeve pipe 1 post, drill-in fluid drives plug to force upper sliding sleeve 32 to move in sleeve pipe 1 together with low sleeve 38, for reducing upper sliding sleeve 32 and the low sleeve 38 abrasion on sleeve pipe 1 inwall further, it is provided with gap between low sleeve 38 hypomere external diameter and housing 31 hypomere inwall, the hypomere of low sleeve 38 plays guide function in sleeve pipe 1 simultaneously, the two ends of housing 31 arrange external screw thread and threaded with sleeve pipe 1, now, annular space between low sleeve 38 hypomere outer wall and sleeve pipe 1 inwall, even if the radial missing that i.e. low sleeve 38 is certain with the upper sliding sleeve 32 mobile generation in sleeve pipe 1, also it is not result between its end and sleeve pipe 1 inwall forming serious abrasion, ensure that low sleeve 38 moves forward under the promotion of plug smoothly with upper sliding sleeve 32.And the stable chute 33 being arranged on upper surface, cut part can not only balanced drilling liquid to the impact effect of each point on upper surface, cut part, moreover it is possible to weaken cut part fracture strength, i.e. build the pressure reach standard value after can quickly realize shear；As preferably, the groove depth of stable chute 33 is set to 0.7 ~ 0.8 times of cut part axial length so that cut part, on the premise of ensureing that interconnecting part is stably supported by it, reduces the fracture strength of cut part simultaneously, facilitates the THE ADIABATIC SHEAR IN of upper sliding sleeve 32.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (4)
- null1. a flow string，Including the sleeve pipe (1) being placed in well (2)，It is characterized in that: on the horizontal segment of described sleeve pipe (1), be provided with two floating couplings (3)，Described floating coupling (3) includes housing (31)、Fixing sleeve (311)、Upper sliding sleeve (32) and low sleeve (38)，Fixing sleeve (311) is fixed on housing (31) inwall epimere，Upper sliding sleeve (32) is made up of the cut part that interconnective interconnecting part is identical with housing (1) internal diameter with external diameter，Cut part is arranged on fixing sleeve (311) epimere inwall by upper nail (34) of shearing，Low sleeve (38) is supported on fixing sleeve (311) inwall hypomere by down cut nail (37)，Described interconnecting part is placed in low sleeve (38)，And on interconnecting part, have discharge orifice (35)，When upper shearing nail (34) is not cut off，Discharge orifice (35) is sealed by low sleeve (38)，When upper shearing nail (34) is cut off，Upper sliding sleeve (32) moves along housing (31) axis direction，Until upper sliding sleeve (32) upper space connects with low sleeve (38) lower space；The stable chute (33) of annular is had in upper surface, described cut part, the curved shape of bottom land concave downward of described stable chute (33), and groove width the successively decreasing axially upwards along cut part of stable chute (33), also include multiple ball (310), circumferential groove (39) is had at described low sleeve (38) hypomere, multiple balls (310) rotate and are arranged on the outer wall of described cannelure (39), and described ball (310) and housing (31) contact internal walls.
- A kind of flow string the most according to claim 1, it is characterized in that: be provided with sealing ring (36) on the sidewall of described upper sliding sleeve (32) hypomere, described sealing ring (36) realizes the sealing between upper sliding sleeve (32) hypomere and low sleeve (38) hypomere inwall.
- A kind of flow string the most according to claim 1, it is characterised in that: leave gap between described low sleeve (38) hypomere external diameter and housing (31) hypomere inwall.
- A kind of flow string the most according to claim 1, it is characterised in that: the groove depth of described stable chute (33) is 0.7 ~ 0.8 times of described cut part axial length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610358948.3A CN105840135A (en) | 2016-05-27 | 2016-05-27 | Production tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610358948.3A CN105840135A (en) | 2016-05-27 | 2016-05-27 | Production tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105840135A true CN105840135A (en) | 2016-08-10 |
Family
ID=56594773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610358948.3A Pending CN105840135A (en) | 2016-05-27 | 2016-05-27 | Production tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105840135A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822469A (en) * | 2023-02-15 | 2023-03-21 | 纬达石油装备有限公司 | Rupture disc type ultrahigh pressure floating coupling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201567960U (en) * | 2009-12-16 | 2010-09-01 | 中国石油集团渤海钻探工程有限公司 | Floating casing pipe installing pipe series |
| CN202266201U (en) * | 2011-08-28 | 2012-06-06 | 中国石油集团长城钻探工程有限公司 | Sleeve floating coupler |
| CN204357368U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Casing floating coupling |
| CN205100896U (en) * | 2015-10-29 | 2016-03-23 | 江苏航天鸿鹏数控机械有限公司 | Formula case can be bored and coupling is floated |
| CN205778722U (en) * | 2016-05-27 | 2016-12-07 | 成都北方石油勘探开发技术有限公司 | A kind of flow string of horizontal well |
-
2016
- 2016-05-27 CN CN201610358948.3A patent/CN105840135A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201567960U (en) * | 2009-12-16 | 2010-09-01 | 中国石油集团渤海钻探工程有限公司 | Floating casing pipe installing pipe series |
| CN202266201U (en) * | 2011-08-28 | 2012-06-06 | 中国石油集团长城钻探工程有限公司 | Sleeve floating coupler |
| CN204357368U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Casing floating coupling |
| CN205100896U (en) * | 2015-10-29 | 2016-03-23 | 江苏航天鸿鹏数控机械有限公司 | Formula case can be bored and coupling is floated |
| CN205778722U (en) * | 2016-05-27 | 2016-12-07 | 成都北方石油勘探开发技术有限公司 | A kind of flow string of horizontal well |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822469A (en) * | 2023-02-15 | 2023-03-21 | 纬达石油装备有限公司 | Rupture disc type ultrahigh pressure floating coupling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105888574A (en) | Well completion pipe string | |
| CN106285483B (en) | A kind of reducing reamer and its reaming hole method | |
| CN203403872U (en) | Multistage fracturing well completion sliding sleeve device | |
| CN103835654A (en) | Friction-reduction and amplitude-increasing downhole tool | |
| CN105822268A (en) | Horizontal well completion pipe string for middle-shallow reservoir | |
| CN104481403A (en) | Stepwise jet-drilling down hole control system | |
| CN106761481A (en) | One kind automatically adjusts the pressure of the drill instrument | |
| CN205778722U (en) | A kind of flow string of horizontal well | |
| CN205778598U (en) | A kind of apply the completion tubular column at horizontal well | |
| CN107558946A (en) | A kind of packer | |
| CN201567994U (en) | Variable-diameter expansion cone for equal-diameter competed well | |
| CN208024274U (en) | A kind of whirling vibration casing guiding tripping in tool | |
| CN205778583U (en) | A kind of horizontal well completion tubular pile | |
| CN105840135A (en) | Production tubing | |
| CN205100896U (en) | Formula case can be bored and coupling is floated | |
| CN103696706A (en) | Remote-control-while-drilling tapered stabilizer | |
| CN102937008B (en) | Top multistage pressure-bearing expansion pipe expansion construction device | |
| CN204357426U (en) | Cross drilling tool storage formula caliper logging instrument balanced structure | |
| CN104265222A (en) | A self-shrinking hydraulic expansion cone | |
| CN102937009B (en) | Top pressure bearing expansion pipe construction operation method | |
| CN203879409U (en) | Drilling rod capable of reducing friction and pressure and removing cuttings bed | |
| CN117759159A (en) | A complex roof large-diameter drilling fracturing gas drainage device | |
| CN201254952Y (en) | Automatic vertical drilling tool by utilizing aerodynamics | |
| CN202937212U (en) | Top multistage pressure bearing type expandable construction device for expandable pipes | |
| CN107780853A (en) | A kind of flow string |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |
|
| RJ01 | Rejection of invention patent application after publication |