CN103742103A - Double guide rod coercing reset type float collar - Google Patents
Double guide rod coercing reset type float collar Download PDFInfo
- Publication number
- CN103742103A CN103742103A CN201410000606.5A CN201410000606A CN103742103A CN 103742103 A CN103742103 A CN 103742103A CN 201410000606 A CN201410000606 A CN 201410000606A CN 103742103 A CN103742103 A CN 103742103A
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- guide rod
- valve
- valve base
- spool
- float collar
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- Float Valves (AREA)
Abstract
The invention belongs to the drilling equipment filed, and particularly relates to a double guide rod coercing reset type float collar. The double guide rod coercing reset type float collar is characterized in that resetting of a valve core is enabled to be accurate andhave zero deviation by matching guide rods on two sides of the valve core with valve core supporting structures on an upper valve seat and a lower valve seat and through a reset spring, reliable sealing of the valve core and a middle valve seat is achieved through a seal valve block on the valve core, good erosion resistance effects of the valve core are obtained through different slope factors of the surface of the seal valve block, and therefore no sediment deposits around the valve core, and simultaneously, reliability of reverse direction sealing can be enhanced by using a sealing self locking structure of the lower valve seat cooperatively with a matched rubber plug. The double guide rod coercing reset type float collar is simple in structure, and can achieve reliable sealing in horizontal well cementing operation.
Description
Technical field
The invention belongs to drilling equipment field, particularly a kind of two guide rod forced resetting formula float collar.
Background technology
In horizontal cementing construction, float collar horizontal positioned, common forced resetting formula float collar is single guide rod structure, valve seat one side has guide rod thereon.During the float collar horizontal positioned of this structure, may produce valve rod and hang one's head because of gravity, reset effect is bad, and seal failure fault is more, causes closing well to be waited solidifying, has wasted a large amount of time, has affected well construction period.
Summary of the invention
For solving the problems such as the sealing surface erosion, Sediment Siltation, the reset that exist in above-mentioned prior art be not in place, the invention provides a kind of two guide rod forced resetting formula float collar, there is reset accurately, fully, spool Anti-erosion is effective, spool is around without features such as Sediment Siltations, simple in structure, sealing is reliable.
The present invention is achieved through the following technical solutions:
A kind of two guide rod forced resetting formula float collar, comprises shell and spool, also comprises upper valve base, middle valve seat, lower valve base and back-moving spring, between the upper valve base and middle valve seat of described spool in shell; Described upper valve base and middle valve seat, middle valve seat and lower valve base are threaded connection respectively, 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 and lower valve base are equipped with spool braced structures; Between described spool and upper valve base, be fixed with back-moving spring; Poppet shaft has two-way guide rod to two ends, two guide rods are respectively by the spool support construction supports of upper valve base and lower valve base, and a side guide rod of spool is through upper valve core braced structures and the back-moving spring of upper valve base.
Further, spool comprises seal valve piece and valve body, and the external diameter of valve body is greater than the external diameter of seal valve piece, seal valve piece and the laminating of middle valve seat end face; Valve body is metal material, and seal valve piece is non-metallic elastic material.
Further, the surface of seal valve piece 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 braced structures 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 passes stem stem and extends to outside upper valve base.
Further, lower valve base has sealing self-locking structure, comprises primary sealing area, secondary sealing area and lock ring draw-in groove, and primary sealing area and secondary sealing area lay respectively at lock ring draw-in groove both sides.
Further, middle valve seat and lower valve base are respectively and between shell, be also provided with seal.
The present invention by the guide rod of spool both sides, coordinates the spool braced structures of upper valve base and lower valve base, and back-moving spring, makes the spool can parking position accuracy, zero deflection; By the seal valve piece on spool, realize the positiver sealing of spool and middle valve seat; By the Different Slope on seal valve piece surface, realize good spool Anti-erosion effect, make spool around without Sediment Siltation; Meanwhile, the sealing self-locking structure of lower valve base and supporting plug are used in conjunction with, and can strengthen the reliability of reverse sealing.
Accompanying drawing explanation
Fig. 1 is 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 braced structures of upper valve base;
Fig. 5 is the schematic diagram of the bottom spool braced structures of lower valve base;
The schematic diagram of Fig. 6 spool open mode;
Fig. 7 is the present invention and the supporting plug schematic diagram while being used in conjunction with;
Wherein: 1: shell; 2: upper valve base; 3: spool; 4: middle valve seat; 5: lower valve base; 6: back-moving spring; 7: seal; 8: primary sealing area; 9: secondary sealing area; 10: lock ring draw-in groove; 11: seal valve piece; 12: valve body; 13: guide face; 14: sealing surface; 15: guide rod; 16: upper valve core braced structures; 17: bottom spool braced structures; 18: supporting pad; 19: plug.
The specific embodiment
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 invention provides a kind of two guide rod forced resetting formula float collar, comprise shell 1 and spool 3, also comprise upper valve base 2, middle valve seat 4, lower valve base 5 and back-moving spring 6, between the upper valve base 2 and middle valve seat 4 of spool 3 in shell 1; Upper valve base 2 is threaded connection respectively with lower valve base 5 with middle valve seat 4, middle valve seat 4, and upper valve base 2 tops, middle valve seat 4 and lower valve base 5 are fitted with shell 1 inwall respectively, and upper valve base 2 and lower valve base 5 are equipped with spool braced structures; Between spool 3 and upper valve base 2, be fixed with back-moving spring 6; The axial two ends of spool 3 have two-way guide rod 15, two guide rods 15 to be supported by the spool support construction supports 16,17 of upper valve base 2 and lower valve base 5 respectively, and the guide rod 15 of spool 3 one sides is through upper valve core braced structures 16 and the back-moving spring 6 of upper valve base 2.
When flow stream pressure in float collar increases, liquid stream promotes spool 3 and moves to left, and opens float collar.Fig. 5 is the view of spool 3 while opening, and in figure, spool 3 is sitting in the upper valve core braced structures 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 rods 15 quick, parking position accuracy under the guiding of upper and lower spool braced structures 16,17.Fig. 1 is the view of spool 3 while 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.
Float collar of the present invention is generally arranged on casing string bottom, a sleeve position place after float shoe.As shown in Figure 1, spool 3, under back-moving spring 6 pretightning force effects, is pressed on middle valve seat 4.Because spool 3 is comprised of valve body 12 and seal valve piece 11.Valve body 12 is metal material, and seal valve piece 11 is non-metallic elastic material, therefore seal valve piece 11 is directly fitted with middle valve seat 4 sealings, makes float collar in sealing state.Because the external diameter of valve body 12 is greater than the external diameter of seal valve piece 11, when spool 3 seals, liquid stream flows along the peripherad valve body of seal valve piece 11.When head of liquid in casing string increases to a certain degree, spool 3 is to left movement under the effect of hydraulic pressure, and compression reseting spring 6, opens float collar.Now, liquid stream flows to surrounding along seal valve piece 11 surfaces.The center flow velocity of making is less than surrounding flow velocity.And surrounding faster liquid stream is deposited on silt in float collar pipe and has rushed and take away, and makes between spool 3 and upper valve base 2 without Sediment Siltation.
On this basis, as shown in Figure 2, the surface of seal valve piece 11 is divided into guide face 13 and sealing surface 14, guide face 13 is near valve body 12 centers, sealing surface 14, near valve body 12 edges, 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, flow through guide face 13 water conservancy diversion of seal valve piece 11 of liquid, flow to surrounding; Be subject to stopping of valve body 12 large diameter portions simultaneously, form eddy current.The liquid flowing speed of now flowing through on the sealing surface 14 of seal valve piece 12 is lower, and the erosion effect of sealing surface 14 is reduced, and effectively protects the sealing surface 14 of seal valve piece 12, guarantees the seal of float collar, extends the application life of spool 3.
As shown in Figure 4, the upper valve core braced structures 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 passes stem stem and extends to outside upper valve base 2.As shown in Figure 5, the bottom spool braced structures 17 of lower valve base 5 has spoke radially, and spoke center has through hole vertically, and guide rod 15 also can move vertically through this through hole.
Have the upper valve core braced structures 16 of spoke-like structure, between its spoke-like structure, can pass through by feed flow stream, spoke-like structure is for supporting the guide rod 15 of spool 3 one sides.In hollow stem stem, be provided with back-moving spring 6, the guide rod 15 of spool 3 one sides is through hollow stem stem and back-moving spring 6.When liquid stream promotes spool 3, move to left, when the prefabricated power that overcomes back-moving spring 6 is opened float collar, liquid spool 3 surroundings of flowing through flow to upper valve base 4, through the spoke-like structure of upper valve base 4, the silt being deposited in float collar are taken away.
In order further to improve the sealing performance of float collar in the present invention, lower valve base 5 also has sealing self-locking structure, as shown in Figure 1, comprises primary sealing area 8, secondary sealing area 9 and lock ring draw-in groove 10, and primary sealing area 8 and secondary sealing area 9 lay respectively at lock ring draw-in groove 10 both sides.Sealing self-locking structure is used in conjunction with supporting plug 19, can realize the sealing self-locking of lower valve base 5 and plug 19, further strengthens the reliability that well cementing operation seals.
Fig. 6 is schematic diagram when float collar and plug 19 are used in conjunction with in the present invention.Plug 19 is under the effect of its tail end head of liquid, the head of plug 19 inserts in float collar from lower valve base 5 bottoms, the lock ring of plug 19 embeds in the lock ring draw-in groove 10 of lower valve base 5, pinning plug 19 stands fast, the primary sealing area 8 of lock ring draw-in groove 10 both sides and secondary sealing area 9 fit tightly with plug 19 corresponding sites, realize the secondary seal to liquid stream in float collar.
In addition, middle valve seat 4 and lower valve base 5 respectively and between shell 1, be also provided with seal, guarantee the sealing performance between each valve seat and shell 1.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (6)
1. pair guide rod forced resetting formula float collar, comprises shell and spool, it is characterized in that, also comprises upper valve base, middle valve seat, lower valve base and back-moving spring, between the upper valve base and middle valve seat of described spool in shell; Described upper valve base and middle valve seat, middle valve seat and lower valve base are threaded connection respectively, 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 and lower valve base are equipped with spool braced structures; Between described spool and upper valve base, be fixed with back-moving spring; Poppet shaft has two-way guide rod to two ends, two guide rods are respectively by the spool support construction supports of upper valve base and lower valve base, and a side guide rod of described spool is through upper valve core braced structures and the back-moving spring of upper valve base.
2. according to claim 1 pair of guide rod forced resetting formula float collar, is characterized in that, described spool comprises seal valve piece and valve body, and the external diameter of described valve body is greater than the external diameter of seal valve piece, seal valve piece and the laminating of middle valve seat end face; Described valve body is metal material, and seal valve piece is non-metallic elastic material.
3. according to claim 2 pair of guide rod forced resetting formula float collar, it is characterized in that, the surface of described seal valve piece is divided into guide face and sealing surface, described guide face is near valve body center, sealing surface is near valve body edge, fit with the end face of middle valve seat, the slope of described guide face is less than the slope of sealing surface.
4. according to claim 3 pair of guide rod forced resetting formula float collar, is characterized in that, the upper valve core braced structures 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 passes stem stem and extends to outside upper valve base.
5. according to claim 4 pair of guide rod forced resetting formula float collar, is characterized in that, described lower valve base has sealing self-locking structure, comprises primary sealing area, secondary sealing area and lock ring draw-in groove, and described primary sealing area and secondary sealing area lay respectively at lock ring draw-in groove both sides.
6. according to claim 5 pair of guide rod forced resetting formula float collar, is characterized in that, described middle valve seat and lower valve base are respectively and between shell, be also provided with seal.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN103742103A true CN103742103A (en) | 2014-04-23 |
| CN103742103B 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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Cited By (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 (5)
| 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 |
| 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 |
-
2014
- 2014-01-02 CN CN201410000606.5A patent/CN103742103B/en active Active
Patent Citations (5)
| 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 |
| 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 |
Cited By (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 |
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| Publication number | Publication date |
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| CN103742103B (en) | 2016-09-14 |
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