CN103742103B - Double guide rod coercing reset type float collar - Google Patents
Double guide rod coercing reset type float collar Download PDFInfo
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- CN103742103B CN103742103B CN201410000606.5A CN201410000606A CN103742103B CN 103742103 B CN103742103 B CN 103742103B CN 201410000606 A CN201410000606 A CN 201410000606A CN 103742103 B CN103742103 B CN 103742103B
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- spool
- valve base
- guide rod
- sealing
- valve
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Abstract
The invention belongs to drilling equipment field, particularly to a kind of double guide rod coercing reset type float collar.The present invention, by the guide rod of spool both sides, coordinates upper valve base and the spool supporting construction of lower valve base, and back-moving spring so that spool can parking position accuracy, zero deflection；The positive sealing of spool and middle valve seat is realized by the valve block that seals on spool；By sealing the Different Slope on valve block surface, it is achieved preferably spool Anti-erosion effect so that without Sediment Siltation around spool；Meanwhile, lower valve base seal self-locking structure and supporting plug with the use of, it is possible to strengthen the reliability reversely sealed.Present configuration is simple, can realize the positive sealing in horizontal cementing operation.
Description
Technical field
The invention belongs to drilling equipment field, particularly to a kind of double guide rod coercing reset type float collar.
Background technology
In horizontal cementing is constructed, float collar horizontal positioned, common forced resetting formula float collar is single guide rod structure, and valve seat side has guide rod the most thereon.May produce valve rod during the float collar horizontal positioned of this structure to hang one's head because of gravity, reset effect is bad, and seal failure fault is more, causes closing well to be waited solidifying, wastes the substantial amounts of time, have impact on well construction period.
Summary of the invention
For solving the problems such as sealing surface erosion present in above-mentioned prior art, Sediment Siltation, reset be not in place, the present invention provides a kind of double guide rod coercing reset type float collar, has reset accurately, fully, spool Anti-erosion is effective, without features such as Sediment Siltations around spool, simple in construction, seal reliable.
The present invention is achieved through the following technical solutions:
A kind of double guide rod coercing reset type float collar, including shell and spool, it is characterised in that also include upper valve base, middle valve seat, lower valve base and back-moving spring, between described spool upper valve base and middle valve seat in shell；Described upper valve base is threaded connection with lower valve base respectively with middle valve seat, middle valve seat, and upper valve base top, middle valve seat and lower valve base are fitted with outer casing inner wall respectively, and described upper valve base is provided with upper valve core supporting construction, and lower valve base is provided with bottom spool supporting construction；It is fixed with back-moving spring between described spool and upper valve base；The axial two ends of spool have two-way guide rod, and two guide rods are supported by the upper valve core supporting construction of upper valve base and the bottom spool supporting construction of lower valve base respectively, and the side guide rod of described spool passes upper valve core supporting construction and the back-moving spring of upper valve base.
Further, spool includes sealing valve block and valve body, and the external diameter of valve body, more than the external diameter of sealing valve block, seals valve block and fits with middle valve seat end face；Valve body is metal material, and sealing valve block is non-metallic elastic material.
Further, the surface sealing valve block is divided into guide face and sealing surface, and guide face is near valve body center, and sealing surface, near valve body edge, fits with the end face of middle valve seat, and the slope of guide face is less than the slope of sealing surface.
Further, the upper valve core supporting construction of upper valve base has axial spoke-like structure, and fits with shell；Described spoke-like structure center has axial hollow stem stem, and guide rod is through stem stem and extends to outside upper valve base.
Further, lower valve base has sealing self-locking structure, lays respectively at lock ring draw-in groove both sides including primary sealing area, secondary sealing area and lock ring draw-in groove, primary sealing area and secondary sealing area.
Further, middle valve seat and lower valve base respectively and are additionally provided with sealing member between shell.
The present invention, by the guide rod of spool both sides, coordinates upper valve base and the spool supporting construction of lower valve base, and back-moving spring so that spool can parking position accuracy, zero deflection；The positive sealing of spool and middle valve seat is realized by the valve block that seals on spool；By sealing the Different Slope on valve block surface, it is achieved preferably spool Anti-erosion effect so that without Sediment Siltation around spool；Meanwhile, lower valve base seal self-locking structure and supporting plug with the use of, it is possible to strengthen the reliability reversely sealed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of spool in the present invention；
Fig. 3 is the structural representation of upper valve base in the present invention；
Fig. 4 is the schematic diagram of the upper valve core supporting construction of upper valve base；
Fig. 5 is the schematic diagram of the bottom spool supporting construction of lower valve base；
The schematic diagram of Fig. 6 spool open mode；
Fig. 7 be the present invention with supporting plug with the use of time schematic diagram；
Wherein: 1: shell；2: upper valve base；3: spool；4: middle valve seat；5: lower valve base；6: back-moving spring；7: sealing member；8: primary sealing area；9: secondary sealing area；10: lock ring draw-in groove；11: seal valve block；12: valve body；13: guide face；14: sealing surface；15: guide rod；16: upper valve core supporting construction；17: bottom spool supporting construction；18: supporting pad；19: plug.
Detailed description of the invention
Below with reference to accompanying drawing, the present invention is described in further details:
Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the present invention provides a kind of double guide rod coercing reset type float collar, including shell 1 and spool 3, also include upper valve base 2, middle valve seat 4, lower valve base 5 and back-moving spring 6, between the spool 3 upper valve base 2 and middle valve seat 4 in shell 1；Upper valve base 2 is threaded connection with lower valve base 5 respectively with middle valve seat 4, middle valve seat 4, and upper valve base 2 top, middle valve seat 4 and lower valve base 5 are fitted with shell 1 inwall respectively, and upper valve base 2 is provided with upper valve core supporting construction 16, and lower valve base 5 is provided with bottom spool supporting construction 17；Back-moving spring 6 it is fixed with between spool 3 and upper valve base 2；The axial two ends of spool 3 have two-way guide rod 15, and two guide rods 15 are supported by the upper valve core supporting construction 16 of upper valve base 2 and the bottom spool supporting construction 17 of lower valve base 5 respectively, and the guide rod 15 of spool 3 side passes upper valve core supporting construction 16 and the back-moving spring 6 of upper valve base 2.
When in float collar, flow stream pressure increases, liquid stream promotes spool 3 to move to left, and opens float collar.Fig. 6 is the spool 3 view when opening, and in figure, spool 3 is sitting in the upper valve core supporting construction 16 of upper valve base 2 by guide rod 15 under the effect of liquid stream.After flow stream pressure reduces, spool 3 is under the restoring force effect of back-moving spring 6, by spool 3 two ends guide rod 15 quick, parking position accuracy under the guiding of upper and lower spool supporting construction 16,17.Fig. 1 is the spool 3 view when sealing, and in figure, spool 3 is under the effect of back-moving spring 6, and spool 3 contacts with middle valve seat 4, closes fluid course.
The float collar of the present invention is typically mounted at casing string bottom, after float shoe at a sleeve position.As it is shown in figure 1, spool 3 is under back-moving spring 6 pretightning force effect, it is pressed on middle valve seat 4.Owing to spool 3 is made up of valve body 12 and sealing valve block 11.Valve body 12 is metal material, and sealing valve block 11 is non-metallic elastic material, therefore seals valve block 11 and directly seal laminating with middle valve seat 4 so that float collar is in sealing state.External diameter due to valve body 12 is more than the external diameter of sealing valve block 11, and when spool 3 seals, liquid stream is along sealing the flowing of valve block 11 peripherad valve body.When in casing string, head of liquid increases to a certain degree, spool 3 under the effect of hydraulic pressure to left movement, compression reseting spring 6 so that float collar is opened.Now, liquid stream flows to surrounding along sealing valve block 11 surface.Make center flow velocity less than surrounding flow velocity.And the surrounding liquid stream faster silt that is deposited in float collar pipe has rushed and taken away, make between spool 3 and upper valve base 2 without Sediment Siltation.
On this basis, as in figure 2 it is shown, the surface sealing valve block 11 is divided into guide face 13 and sealing surface 14, guide face 13 is near valve body 12 center, sealing surface 14, near valve body 12 edge, fits with the end face of middle valve seat 4, and the slope of guide face 13 is less than the slope of sealing surface 14.Therefore, guide face 13 water conservancy diversion of liquid stream sealed valve block 11, flow to surrounding；Stopped by valve body 12 large diameter portion simultaneously, formed eddy current.Now flowing through the liquid flowing speed on the sealing surface 14 sealing valve block 11 relatively low, the erosion effect to sealing surface 14 reduces, and effectively protection seals the sealing surface 14 of valve block 11, it is ensured that the seal of float collar, extends the service life of spool 3.
As shown in Figure 4, the upper valve core supporting construction 16 of above-mentioned upper valve base 2 has axial spoke-like structure, and fits with shell 1；Spoke-like structure center has axial hollow stem stem, and guide rod 15 is through stem stem and extends to outside upper valve base 2.As it is shown in figure 5, the bottom spool supporting construction 17 of lower valve base 5 has spoke radially, spoke is centrally along axially having through hole, and guide rod 15 is through this through hole and can axially move.
Having the upper valve core supporting construction 16 of spoke-like structure, be available for liquid stream and pass through between its spoke-like structure, spoke-like structure is for supporting the guide rod 15 of spool 3 side.Being provided with back-moving spring 6 in hollow stem stem, the guide rod 15 of spool 3 side is through hollow stem stem and back-moving spring 6.When liquid stream promotes spool 3 to move to left, when overcoming the prefabricated power of back-moving spring 6 to open float collar, liquid stream flows to upper valve base 2 through spool 3 surrounding, through the spoke-like structure of upper valve base 2, is taken away by the silt being deposited in float collar.
In order to improve the sealing property of float collar in the present invention further, lower valve base 5 also has sealing self-locking structure, as it is shown in figure 1, include that primary sealing area 8, secondary sealing area 9 and lock ring draw-in groove 10, primary sealing area 8 and secondary sealing area 9 lay respectively at lock ring draw-in groove 10 both sides.Seal self-locking structure and supporting plug 19 with the use of, it is possible to realize the sealing self-locking of lower valve base 5 and plug 19, further enhance the reliability that well cementing operation seals.
Fig. 7 be in the present invention float collar and plug 19 with the use of time schematic diagram.Plug 19 is under the effect of its tail end head of liquid, the head of plug 19 inserts in float collar bottom lower valve base 5, the lock ring of plug 19 embeds in the lock ring draw-in groove 10 of lower valve base 5, pin plug 19 to stand fast, primary sealing area 8 and the secondary sealing area 9 of lock ring draw-in groove 10 both sides fit tightly with plug 19 corresponding site, it is achieved to the secondary seal of liquid stream in float collar.
It addition, middle valve seat 4 and lower valve base 5 respectively and are additionally provided with sealing member between shell 1, it is ensured that the sealing property between each valve seat and shell 1.
Parts that the present embodiment describes the most in detail and structure belong to the well-known components of the industry and common structure or conventional means, describe the most one by one.
Claims (6)
1. double guide rod coercing reset type float collar, including shell and spool, it is characterised in that also include upper valve base, middle valve seat, lower valve base and back-moving spring, between described spool upper valve base and middle valve seat in shell；Described upper valve base is threaded connection with lower valve base respectively with middle valve seat, middle valve seat, and upper valve base top, middle valve seat and lower valve base are fitted with outer casing inner wall respectively, and described upper valve base is provided with upper valve core supporting construction, and lower valve base is provided with bottom spool supporting construction；It is fixed with back-moving spring between described spool and upper valve base；The axial two ends of spool have two-way guide rod, and two guide rods are supported by the upper valve core supporting construction of upper valve base and the bottom spool supporting construction of lower valve base respectively, and the side guide rod of described spool passes upper valve core supporting construction and the back-moving spring of upper valve base.
Double guide rod coercing reset type float collar the most according to claim 1, it is characterised in that described spool includes sealing valve block and valve body, the external diameter of described valve body, more than the external diameter of sealing valve block, seals valve block and fits with middle valve seat end face；Described valve body is metal material, and sealing valve block is non-metallic elastic material.
Double guide rod coercing reset type float collar the most according to claim 2, it is characterized in that, the surface of described sealing valve block is divided into guide face and sealing surface, described guide face is near valve body center, sealing surface is near valve body edge, fitting with the end face of middle valve seat, the slope of described guide face is less than the slope of sealing surface.
Double guide rod coercing reset type float collar the most according to claim 3, it is characterised in that the upper valve core supporting construction of described upper valve base has axial spoke-like structure, and fits with shell；Described spoke-like structure center has axial hollow stem stem, and guide rod is through stem stem and extends to outside upper valve base.
Double guide rod coercing reset type float collar the most according to claim 4, it is characterised in that described lower valve base has sealing self-locking structure, including primary sealing area, secondary sealing area and lock ring draw-in groove, described primary sealing area and secondary sealing area lay respectively at lock ring draw-in groove both sides.
Double guide rod coercing reset type float collar the most according to claim 5, it is characterised in that described middle valve seat and lower valve base respectively and are additionally provided with sealing member between shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410000606.5A CN103742103B (en) | 2014-01-02 | 2014-01-02 | Double guide rod coercing reset type float collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410000606.5A CN103742103B (en) | 2014-01-02 | 2014-01-02 | Double guide rod coercing reset type float collar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103742103A CN103742103A (en) | 2014-04-23 |
| CN103742103B true CN103742103B (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410000606.5A Active CN103742103B (en) | 2014-01-02 | 2014-01-02 | Double guide rod coercing reset type float collar |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143304A (en) * | 2017-06-19 | 2017-09-08 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Anti- plug floating float collar device and cementing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2903355Y (en) * | 2005-12-02 | 2007-05-23 | 大庆石油管理局 | Self filling tongue sheet type floating hoop |
| CN201428429Y (en) * | 2009-06-10 | 2010-03-24 | 林芳 | Anti-clogging arrow back pressure valve |
| CN203214003U (en) * | 2013-01-21 | 2013-09-25 | 中国石油化工股份有限公司 | Float collar and pipe string using same |
| CN203640680U (en) * | 2014-01-02 | 2014-06-11 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Forced reset float collar with double guide rods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829952A (en) * | 1995-05-19 | 1998-11-03 | Shadden; Darrel W. | Check valve with a reversible valve ball and seat |
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2014
- 2014-01-02 CN CN201410000606.5A patent/CN103742103B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2903355Y (en) * | 2005-12-02 | 2007-05-23 | 大庆石油管理局 | Self filling tongue sheet type floating hoop |
| CN201428429Y (en) * | 2009-06-10 | 2010-03-24 | 林芳 | Anti-clogging arrow back pressure valve |
| CN203214003U (en) * | 2013-01-21 | 2013-09-25 | 中国石油化工股份有限公司 | Float collar and pipe string using same |
| CN203640680U (en) * | 2014-01-02 | 2014-06-11 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Forced reset float collar with double guide rods |
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| CN103742103A (en) | 2014-04-23 |
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