CN104005708B - Sleeve pipe resistance absorber - Google Patents
Sleeve pipe resistance absorber Download PDFInfo
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- CN104005708B CN104005708B CN201310060117.4A CN201310060117A CN104005708B CN 104005708 B CN104005708 B CN 104005708B CN 201310060117 A CN201310060117 A CN 201310060117A CN 104005708 B CN104005708 B CN 104005708B
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- urceolus
- core
- sleeve pipe
- opening
- pipe resistance
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Abstract
The present invention relates to a kind of sleeve pipe resistance absorber, including, the housing of hollow, it is configured with groove on an interior surface of the housing, it is arranged on the urceolus of enclosure interior, the sidewall of urceolus is provided with and the through hole of described groove match, urceolus is by through through hole and extend to the pressure-bearing slide block in described groove and be connected to described housing, core body, it is arranged on the inside of urceolus and can lean described pressure-bearing slide block, core body includes opening upper core by what shear pin was connected to urceolus, with be fixedly connected on core under the opening opening upper core downstream part, it is provided with bottom lower core with the fluid passage of the intracavity inter-connection opening core and described fluid passage at the bottom opening opening lower core opening.The sleeve pipe resistance absorber of the present invention can form air column in the downstream space of sleeve pipe resistance absorber, enabling increases pipe string at liquid, for instance the buoyancy in drilling fluid, reduces the frictional resistance between pipe string and the borehole wall so that entering pipe string under smoothly.
Description
Technical field
The present invention relates to a kind of cementing tool, particularly a kind of sleeve pipe resistance absorber.
Background technology
With the progress of petroleum drilling technology, in order to increase yield, the exceptional well such as High angle, extended reach well increases year by year.When entering sleeve pipe under in high angle hole, pipe string can be subject to the impact of action of gravity and very easily produce frictional resistance with the borehole wall and cause entering under pipe string difficulty, particularly even more serious in this situation of the steady tilted section that hole angle is maximum.
In order to solve this problem, generally use floating coupling and float shoe in the prior art.Its operation principle: enter under sleeve pipe in process, pipe string intrasegmental part between floating coupling and float shoe is full of air dielectric, owing to the density of air makes pipe string suspend in the wellbore less than the density of liquid, so that it is guaranteed that the centralizer that pipe string is in the wellbore, reduce frictional resistance to greatest extent so that pipe string smooth under enter.
Chinese patent CN201020284037.9 discloses a kind of casing float collar.It is provided with blind plate, to form air column in pipe string in this casing float collar.But, the voltage endurance capability of this blind plate is poor, it is easy to lost efficacy, if by thicker for being made as of blind plate, casing float collar can become heavy.Exempting from disclosed in Chinese patent CN201120119090.8 also has identical problem in brill formula floating coupling.Therefore, for guaranteeing to enter under sleeve pipe in extended reach well well cementing operation is smoothly, a kind of novel downhole tool need to be researched and developed.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of sleeve pipe resistance absorber.This sleeve pipe resistance absorber can bear higher pressure and simple in construction.
According to the present invention, propose a kind of sleeve pipe resistance absorber, including, the housing of hollow, it is configured with groove on an interior surface of the housing, it is arranged on the urceolus of enclosure interior, the sidewall of urceolus is provided with the through hole with groove match, urceolus is by through through hole and extend to the pressure-bearing slide block in groove and be connected to housing, core body, it is arranged on the inside of urceolus and can lean pressure-bearing slide block, core body is included being connected to by shear pin the tubular of urceolus and opens upper core, lower core is opened with the tubular being fixedly connected on the bottom lock opening upper core downstream part, it is provided with bottom lower core with the fluid passage of the intracavity inter-connection opening core and fluid passage at the described bottom opening opening lower core opening,
In the initial state, core body leans pressure-bearing slide block, and fluid passage is blocked by the sidewall of urceolus to form air column in the downstream space opening lower core, when needs destroy air column, liquid arrival predetermined value of pressurizeing is injected to be cut off by shear pin to core body top, make core body along the inwall of urceolus towards downstream movement, until fluid passage is through, so that liquid destroys air column.
By means of the invention it is possible to form air column in the pipe strand space in sleeve pipe resistance absorber downstream, so can increasing pipe string at liquid, for instance the buoyancy in drilling fluid, reducing the frictional resistance between pipe string and the borehole wall so that entering pipe string under smoothly.It addition, the pressure that the pressure that pressure-bearing slide block can bear can bear far above shear pin, it is to avoid miscut disconnected pressure-bearing slide block before shear pin is cut off and the effect of sleeve pipe resistance absorber was lost efficacy.
In one embodiment, the inwall of housing there is no bossing radially inwards.This means that the inner wall structure of housing is except the groove of enlarged-diameter, the equal diameters of remainder and equal with the internal diameter of sleeve pipe.The housing of this structure guarantee drill bit under enter in process will not jam, facilitate to enter under drill bit.Additionally, the simple in construction of this housing, easy to process.
In one embodiment, in the initial state, open together with the circumferential side wall of lower core acts against with pressure-bearing slide block.So, opening lower core and can prevent skidding off of pressure-bearing slide block such that it is able to guarantee in the initial state, urceolus can be connected to housing by pressure-bearing slide block.
In one embodiment, the height opening fluid passage bottom the lower core distance from urceolus downstream end less than the circumferential side wall opening lower core and pressure-bearing slide block and overlapping part it is arranged on.So, only after the fluid passage being arranged in the bottom opening lower core exposes, namely air column start destroyed after, open lower core and just no longer lean pressure-bearing slide block so that urceolus can depart from housing and towards downstream movement, in order to carry out construction procedure subsequently.In a preferred embodiment, groove and hole configuration have the inclined-plane towards inclined downstream, and pressure-bearing slide block is configured with the shape with slopes which match.This structure makes opening after lower core no longer leans pressure-bearing slide block, pressure-bearing slide block can automatically in groove out, be connected thus urceolus can automatically terminate with housing.
In one embodiment, the downstream of urceolus is provided with the righting plug with inner walls close contact, and righting plug includes the plug heart of the penetrating via matched with the inner chamber with urceolus.This righting plug so that at urceolus towards in downstream movement process, guaranteeing that urceolus will not touch housing or sleeve pipe, solve the problem that jam easily occurs in the motor process in downstream in urceolus.
In one embodiment, the upstream end thereof of core body is additionally provided with and the seal rubber plug of inner walls close contact, seal rubber plug include with the plug core opening the penetrating via that upper in-core chamber matches.This seal rubber plug can bear higher pressure and achieve the sealing of wide arc gap between urceolus and housing, it is prevented that the liquid in the tubing string of sleeve pipe resistance absorber upstream through sleeve pipe resistance absorber towards downstream flow.
In one embodiment, fluid passage is configured to extend in a radial direction.In a preferred embodiment, the quantity of fluid passage is multiple, and is uniformly distributed in the circumferential.
In one embodiment, urceolus is additionally provided with the mudhole running through urceolus circumferential side wall.Mudhole is easy in urceolus dirt or the discharge of the material such as liquid, gas accumulated, in order to core body slides along urceolus.
In this application, it is downstream that term " upstream ", " downstream " are defined as towards flow direction, and reverse flow direction is upstream.Term " original state " is defined as the state before shear pin is cut short.
Compared with prior art, it is an advantage of the current invention that the sleeve pipe resistance absorber of the present invention can form air column in the downstream space of sleeve pipe resistance absorber, enabling increase pipe string at liquid, such as, buoyancy in drilling fluid, reduces the frictional resistance between pipe string and the borehole wall so that entering pipe string under smoothly.The pressure that the pressure that pressure-bearing slide block can bear can bear far above shear pin, it is to avoid the disconnected pressure-bearing slide block of miscut before shear pin is cut off and the effect of sleeve pipe resistance absorber was lost efficacy.Seal rubber plug solves the sealing problem of wide arc gap high pressure-bearing.Righting plug avoid interior adnexa descending time and sleeve pipe between the problem of metal friction and ancestral's card blocked portion.Internal diameter is all consistent with sleeve pipe, it is to avoid the blocked portion problem in time step work progress.
Accompanying drawing explanation
Based on embodiment reference accompanying drawing, the present invention will be described in more detail hereinafter.Wherein:
Fig. 1 is the structural representation of the sleeve pipe resistance absorber according to the present invention.
In the drawings, identical component is indicated by identical accompanying drawing labelling.Accompanying drawing is not drawn according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 show schematically show the structure of the sleeve pipe resistance absorber 10 according to the present invention.Sleeve pipe resistance absorber 10 includes housing 11 and is arranged on the urceolus 12 within housing 11.The inner surface of housing 11 is configured with groove 13, the sidewall of urceolus 12 is provided with the through hole 14 matched with groove 13, thus urceolus 12 is by through through hole 14 and extend to the pressure-bearing slide block 15 in groove 13 and be connected to housing 11.In one embodiment, not bossing radially inwards on the inwall of housing 11, it means that the inner wall structure of housing 11 is except the groove 13 of enlarged-diameter, the equal diameters of remainder with guarantee drill bit (not shown) under enter will not jam in process.
In the embodiment shown in fig. 1, groove 13 and through hole 14 are configured with the inclined-plane towards inclined downstream, and pressure-bearing slide block 15 is configured with the shape with slopes which match.This structure makes, and in case of need, pressure-bearing slide block 15 can skid off automatically in groove 13, and to release the connection between housing 11 and urceolus 12, this will be described below.
Sleeve pipe resistance absorber 10 also includes the core body being arranged in urceolus 12.Inside that core body includes being arranged on urceolus 12 and be connected to the tubular of urceolus 12 by shear pin 21 and open core 22, and the tubular being fixedly connected on the bottom lock opening core 22 downstream part opens lower core 23.So, after shear pin 21 is cut off, open core 22 and can slide towards downstream along the inwall of urceolus 12.As it is shown in figure 1, be additionally provided with the discharge opeing/pore 50 running through urceolus 11 circumferential side wall on urceolus 12, in order to the liquid/gas accumulated in urceolus 12 is discharged, it is simple to open the slip of core 22.
Open lower core main body 23 and include being provided with bottom 26 and the circumferential side wall 27 of multiple fluid passage 24.As it is shown in figure 1, the downstream part plug-in type opening core 22 is connected to the circumferential side wall 27 opening lower core 23, for instance be threaded connection.One opening of fluid passage 24 is opening the intermediate openings bottom lower core 23, another opening open the sidepiece of lower core 23 so that on opening core 22 be connected to open lower core 23 time, fluid passage 24 can be connected with the inner chamber 25 opening upper core 22.In one embodiment, fluid passage 24 is configured to extend in a radial direction.The quantity of fluid passage 24 is multiple, and is uniformly distributed in the circumferential.
Downstream at urceolus 12 is provided with righting plug 40.Righting plug 40 includes the metal closures core 41 with penetrating via and outside plug 42, and righting plug 40 is known by those skilled in the art, repeats no more here.In confined state, the outside plug 42 of righting plug 40 contacts with the inwall of housing 11 so that urceolus 12 is spaced apart with housing 11, this makes at urceolus 12 towards in downstream movement process, guarantee that urceolus 12 will not touch housing 11 or sleeve pipe (not shown), solve the jam problem that urceolus 12 easily occurs in the motor process in downstream.
On opening, the upstream end thereof of core 22 is provided with seal rubber plug 30.Seal rubber plug 30 includes the metal closures core 31 with penetrating via and outside plug 32, and seal rubber plug 30 is known by those skilled in the art, repeats no more here.In confined state, the penetrating via 34 of metal closures core 31 connects to form fluid passage with the inner chamber 25 opening upper core 22.The outside plug 32 of seal rubber plug 30 contacts with the inwall slipper seal formula of housing 11, thus the wide arc gap sealed between urceolus 12 and housing 11, it is prevented that the liquid in the tubing string of sleeve pipe resistance absorber 10 upstream through sleeve pipe resistance absorber 10 towards downstream flow.In a preferred embodiment, seal rubber plug 30 is also attached to urceolus 12 and makes seal rubber plug 30 and urceolus 12 be formed as a whole thus when urceolus 12 is towards downstream movement, seal rubber plug 30 also can be always ensured that the wide arc gap between sealed outer cylinder 12 and housing 11 with it towards downstream movement.In one embodiment, seal rubber plug 30 is connected with urceolus 12 by jump ring 33.
The using method of sleeve pipe resistance absorber 10 according to the present invention is described in detail below.In the initial state, as it is shown in figure 1, open core 22 to be fixedly installed on the inside of urceolus 12 by shear pin 21, and open lower core 23 and be connected to the downstream end opening core 22.It is arranged on the fluid passage 24 opened bottom lower core 23 also to be blocked by the sidewall of urceolus 12.Pressure-bearing slide block 15 is through through hole 14 and extends in groove 13, and the circumferential side wall 27 simultaneously opening lower core 23 leans pressure-bearing slide block 15, so that urceolus 12 is fixedly connected on housing 11.So, in the downstream tube strand space of sleeve pipe resistance absorber 10, air column is formed.
When air column is destroyed by needs, being filled with liquid in the upstream tube string of sleeve pipe resistance absorber 10, liquid can flow into and terminate at fluid passage 24 by the inner chamber 25 through opening upper core 22.By liquid pressing to predetermined value and after being cut off by shear pin 21, opening core 22 under fluid pressure effect can along the inwall of urceolus 12 towards downstream movement.It should be noted here that ground is, owing to the bearing capacity of pressure-bearing slide block 15 is much larger than the bearing capacity of shear pin 21, therefore before being cut off by shear pin 21, will not first to cut off pressure-bearing slide block 15.After fluid passage 24 moves out from the region of urceolus 12, air column can be destroyed by liquid in fluid passage 24 stream to the space formed air column.Owing to being arranged on the height opening fluid passage 24 bottom lower core 23 distance from urceolus 12 downstream end less than the circumferential side wall 27 opening lower core 23 and pressure-bearing slide block 15 and overlapping part, so after only having the opening blocked when the sidewall by urceolus 12 of fluid passage 24 to expose, the circumferential side wall 27 opening lower core 23 its is possible to no longer lean pressure-bearing slide block 15, this means only after air column starts to be destroyed, pressure-bearing slide block 15 could withdraw from groove 13, urceolus 12 is no longer connected with housing 11, urceolus 12 also can towards downstream movement so that carrying out construction procedure subsequently.
Last it is noted that the foregoing is only the preferred embodiments of the invention, it is not intended that any limitation of the invention.Although the present invention being described in detail with reference to foregoing embodiments, it will be apparent, however, to one skilled in the art, that still the technical scheme described in previous embodiment can be modified, or wherein portion of techniques feature is carried out equivalent replacement.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a sleeve pipe resistance absorber, including,
The housing of hollow, is configured with groove on the inner surface of described housing,
Be arranged on the urceolus of described enclosure interior, the sidewall of described urceolus be provided with and the through hole of described groove match, described urceolus by through described through hole and extend to the pressure-bearing slide block in described groove and be connected to described housing,
Core body, it is arranged on the inside of described urceolus and can lean described pressure-bearing slide block, described core body is included being connected to by shear pin the tubular of urceolus and opens upper core, with be fixedly connected on described in open upper core downstream part the tubular of bottom lock open lower core, it is provided with bottom lower core with the fluid passage of the intracavity inter-connection of core on described opening and described fluid passage at the described bottom opening opening lower core described opening
In the initial state, described core body leans described pressure-bearing slide block, and described fluid passage is blocked by the sidewall of described urceolus to form air column in the described downstream space opening lower core, when needs destroy described air column, liquid arrival predetermined value of pressurizeing is injected to be cut off by shear pin to opening upper core top, make described core body along the inwall of described urceolus towards downstream movement, until described fluid passage is through, so that liquid destroys described air column.
2. sleeve pipe resistance absorber according to claim 1, it is characterized in that, the upstream end thereof of described core body is additionally provided with and the seal rubber plug of described inner walls close contact, described seal rubber plug include with the described plug core opening the penetrating via that upper in-core chamber matches.
3. sleeve pipe resistance absorber according to claim 1 and 2, it is characterised in that the downstream of described urceolus is provided with and the righting plug of described inner walls close contact, and described righting plug includes the plug core of the penetrating via matched with the inner chamber with described urceolus.
4. sleeve pipe resistance absorber according to claim 1, it is characterised in that in the initial state, described in open together with the circumferential side wall of lower core acts against with described pressure-bearing slide block.
5. sleeve pipe resistance absorber according to claim 4, it is characterised in that open the distance from described urceolus downstream end of the fluid passage bottom lower core described in being arranged on and overlap less than the described circumferential side wall opening lower core and described pressure-bearing slide block the height of part.
6. sleeve pipe resistance absorber according to claim 1, it is characterised in that do not have bossing radially inwards on the inwall of described housing.
7. sleeve pipe resistance absorber according to claim 1, it is characterised in that described groove and hole configuration have the inclined-plane towards inclined downstream, and described pressure-bearing slide block is configured with and the shape of described slopes which match.
8. sleeve pipe resistance absorber according to claim 1, it is characterised in that described fluid passage is configured to extend in a radial direction.
9. sleeve pipe resistance absorber according to claim 8, it is characterised in that the quantity of described fluid passage is multiple, and is uniformly distributed in the circumferential.
10. sleeve pipe resistance absorber according to claim 1, it is characterised in that be additionally provided with the mudhole running through described urceolus circumferential side wall on described urceolus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310060117.4A CN104005708B (en) | 2013-02-26 | 2013-02-26 | Sleeve pipe resistance absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310060117.4A CN104005708B (en) | 2013-02-26 | 2013-02-26 | Sleeve pipe resistance absorber |
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| Publication Number | Publication Date |
|---|---|
| CN104005708A CN104005708A (en) | 2014-08-27 |
| CN104005708B true CN104005708B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310060117.4A Active CN104005708B (en) | 2013-02-26 | 2013-02-26 | Sleeve pipe resistance absorber |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106639911B (en) * | 2016-12-26 | 2018-09-04 | 中国石油天然气股份有限公司 | A kind of reducing floating coupling |
| US11098552B2 (en) | 2019-05-13 | 2021-08-24 | Saudi Arabian Oil Company | Systems and methods for freeing stuck pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2212086A (en) * | 1936-10-27 | 1940-08-20 | Charles W Thornhill | Float collar and guide shoe |
| CN1053278A (en) * | 1989-08-31 | 1991-07-24 | 加利福尼亚联合石油公司 | Well casing flotation device and method |
| CN2235497Y (en) * | 1995-03-15 | 1996-09-18 | 胜利石油管理局钻井工艺研究院 | Device for forcing casing into borehole for quick drilling |
| CN2385079Y (en) * | 1999-08-13 | 2000-06-28 | 胜利油田钻井北星工贸公司 | Drillable casing automatic fill-up float shoe |
| CN2886053Y (en) * | 2006-01-24 | 2007-04-04 | 石凤岐 | Going-into-well resistance absorber for horizontal well casing |
-
2013
- 2013-02-26 CN CN201310060117.4A patent/CN104005708B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2212086A (en) * | 1936-10-27 | 1940-08-20 | Charles W Thornhill | Float collar and guide shoe |
| CN1053278A (en) * | 1989-08-31 | 1991-07-24 | 加利福尼亚联合石油公司 | Well casing flotation device and method |
| CN2235497Y (en) * | 1995-03-15 | 1996-09-18 | 胜利石油管理局钻井工艺研究院 | Device for forcing casing into borehole for quick drilling |
| CN2385079Y (en) * | 1999-08-13 | 2000-06-28 | 胜利油田钻井北星工贸公司 | Drillable casing automatic fill-up float shoe |
| CN2886053Y (en) * | 2006-01-24 | 2007-04-04 | 石凤岐 | Going-into-well resistance absorber for horizontal well casing |
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| CN104005708A (en) | 2014-08-27 |
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