CN203214003U - Float collar and pipe string using same - Google Patents
Float collar and pipe string using same Download PDFInfo
- Publication number
- CN203214003U CN203214003U CN 201320030807 CN201320030807U CN203214003U CN 203214003 U CN203214003 U CN 203214003U CN 201320030807 CN201320030807 CN 201320030807 CN 201320030807 U CN201320030807 U CN 201320030807U CN 203214003 U CN203214003 U CN 203214003U
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- China
- Prior art keywords
- float collar
- valve
- supporter
- lock ring
- locating piece
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a float collar which comprises a valve base and a supporting body. The upper portion of the supporting body is connected to the lower portion of the valve base, and the lower portion of the supporting body is composed of a plurality of ribs. The ribs are intersected on the bottom of the supporting body, and a guiding hole is formed in the intersection position. A positioning block protruding outwards in the radial direction is arranged on the external plane of each rib. The supporting body is internally provided with a valve which comprises a head and a guiding rod, wherein the guiding rod of the valve is inserted into the guiding hole, the head of the valve can be contacted with a sealing face of the internal plane of the circumferential wall of the valve base, and an elastic part for supporting the valve is arranged between the head of the valve and the bottom of the supporting body. The float collar further comprises an installation locking ring which can accommodate the supporting body. The utility model further relates to a pipe strip using the float collar. The float collar is simple in structure, convenient to install, firm and beneficial to drilling.
Description
Technical field
The utility model relates to a kind of parts that are applicable to well cementing operation, particularly a kind of float collar.The utility model also relates to the pipe string that uses this float collar.
Background technology
Float collar is a kind of application cementing tool annex very widely, and its effect comprises: the suffered buoyancy of casing string when adjusting setting of casing, when well cementation, prevent that cement paste from returning in the sleeve pipe, and accurately control the interior cement plug height of sleeve pipe etc.
At present, common float collar is divided into traditional float collar and embedded float collar.The outermost of tradition float collar is provided with metal float collar shell, and portion is provided with one way valve in the enclosure.When going into well, traditional float collar need be connected between two sleeve pipes of pipe string bottommost.Because the outer setting of traditional float collar has shell, therefore the area of passage of traditional float collar is less, and manufacturing cost is also higher.Embedded float collar has then been cancelled the float collar shell, only remains with the one way valve core body, and the external surface of core body is provided with the bidirectional locking slips.Slips can under the effect of specialist tools, expand and wedging on internal surface of sleeve pipe, like this float collar bidirectional locking is fixed.But embedded float collar needs be connected with two sleeve pipes simultaneously, and this has increased unnecessary linking and connects, and has improved operating risk.Embedded float collar must use special setting tool that slips is expanded, and operation is trouble relatively.Bearing under the high back voltage situation at embedded float collar, exist slips locking lost efficacy and in sleeve pipe occurrence positions move risk.In addition, also more complicated of the structure of embedded float collar.
The utility model content
At existing above-mentioned technical problem in the prior art, the utility model proposes a kind of float collar.This float collar is simple in structure, area of passage big, it is also very convenient to install and use.The utility model also relates to the pipe string that uses this float collar.
According to first aspect of the present utility model, a kind of float collar is provided, comprise valve seat, supporter, its upstream portion is connected in the valve seat downstream part, the downstream part of supporter is made of many ribs, these many ribs intersect in the bottom of supporter and are provided with pilot hole in the intersection, exterior face at rib is configured with locating piece, be provided with the valve that comprises head and guide rod in supporter inside, the guide rod of valve inserts in the pilot hole, and the head of valve can contact with the circumferential pars intramuralis face sealing of valve seat, between the bottom of the head of valve and supporter, also be provided with the elastic component that supports valve, also comprise the installation lock ring that can hold supporter.
According to float collar of the present utility model, the downstream part of supporter only comprises many ribs, has therefore greatly increased the area of passage of float collar.In one embodiment, the height of installation lock ring is identical with the height of locating piece.Like this, the side less area that lock ring only covers supporter is installed, has guaranteed that float collar has bigger area of passage.By elastic component is set, in sleeve pipe and under the action of pressure in the pit shaft, thereby can moving automatically, valve realizes the automatic opening and closing of float collar.In one embodiment, elastic component is spring.In addition, this float collar does not have shell, has saved process time and raw material, has reduced the simple in structure of cost of production and this float collar, and is easy to assembly.
In one embodiment, be provided with the groove that is complementary with locating piece at the inner surface that lock ring is installed.The cooperation of locating piece and groove can prevent from installing relatively rotating between lock ring and the supporter, and this helps to bore except float collar.In addition, the high guided bone of locating piece and groove has made things convenient for user of service's assembling.
In one embodiment, lock ring is installed and is had breach.In a preferred embodiment, on the external surface that lock ring is installed, also be provided with anti-rotation groove.Anti-rotation groove prevents that with the binding energy of pipe string miscellaneous part float collar from rotating.In another embodiment, locating piece is the wedge of attenuation gradually towards the downstream, and groove is the slope groove with the wedge coupling.Installation lock ring with breach can be expanded, and the cooperation of wedge and slope groove makes and boring except in the process of float collar, can apply radially outer active force and make its expansion lock ring is installed.When the expansion of installation lock ring touched the box cupling inwall of pipe string, anti-rotation groove can contact with the box cupling inwall and stop float collar to rotate, and this all helps brill except float collar.
In one embodiment, be provided with negative thread in the upstream portion of supporter, be provided with the pin thread that is complementary with this negative thread in the downstream part of valve seat.Realized that by the cooperation between negative thread and the pin thread valve seat is connected with supporter, this has made things convenient for assembling and the use of float collar.
According to second aspect of the present utility model, the pipe string of a kind of use according to float collar mentioned above is provided, wherein the pipe string comprises box cupling, box cupling upstream portion inboard and inboard, downstream part all are connected with sleeve pipe, lock ring is installed is in two gaps between the sleeve pipe, and the upstream face of locating piece engages with the upstream sleeve pipe.When float collar was subjected to bigger pressure towards the upstream, float collar did not have the danger of motion upstream like this.In addition, because locating piece engages with the upstream sleeve pipe, also no longer need to make valve seat to fixedly connected with sleeve pipe, this has made things convenient for user's installation.
In one embodiment, between the circumferential wall external surface of valve seat and the internal surface of casing for being sealed and matched.By this fit system, guaranteed the anti-back pressure ability of float collar.
In this application, the cephalad direction that term " upstream ", " downstream " are defined as valve in installment state is the upstream, and the direction opposite with the upstream is the downstream.
Compared with prior art, advantage of the present utility model is that the downstream part of supporter only comprises many ribs, has greatly increased the area of passage of float collar.Have that the installation lock ring of breach, external surface that lock ring is installed are provided with anti-rotation groove, the wedge installed on the rib of slope groove and supporter on the lock ring matches, being used in combination of these technical characterictics helps to bore removes float collar.In addition, locating piece engages with the upstream sleeve pipe and makes float collar not have the danger of motion upstream in according to the pipe string of this practicality, and also no longer needs valve seat is fixedlyed connected with sleeve pipe, and this has made things convenient for user's installation.Valve seat and sleeve pipe are to be sealed and matched to have guaranteed the anti-back pressure ability of float collar.
Description of drawings
To and come with reference to the accompanying drawings the utility model is described in more detail based on embodiment hereinafter.Wherein:
Fig. 1 is the structural representation according to float collar of the present utility model;
Fig. 2 is the 3-D view according to supporter of the present utility model;
Fig. 3 is the 3-D view according to installation lock ring of the present utility model;
Fig. 4 is according to float collar of the present utility model structural representation in use.
In the drawings, identical member is indicated by identical Reference numeral.Accompanying drawing is not according to the scale of reality.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 has schematically shown the structure according to float collar 10 of the present utility model.Float collar 10 comprises valve seat 11, and the downstream part of valve seat 11 is connected in the upstream portion of supporter 20.As shown in Figure 2, the upstream portion of supporter 20 is that circular cylinder 21 is connected with the downstream part with valve seat 11.In one embodiment, be provided with negative thread at the inner surface of the circular cylinder 21 of supporter 20, external surface is provided with pin thread in the downstream part of valve seat 11, to realize being threaded of valve seat 11 and supporter 20.The downstream part of supporter 20 is made of many ribs 22, and these many ribs 22 intersect in the bottom of supporter 20 and are provided with pilot hole 27 in the intersection.As a whole, supporter 20 forms gaily decorated basket shapes, and the area of passage of float collar 10 can be greatly improved in the gap between many ribs 22.Be provided with radially outward the locating piece 24 that protrudes at every rib 22, realize the installation of float collar 10 to cooperate with hereinafter described installation lock ring 30.
Float collar 10 also comprises the valve 14 that comprises head 12 and guide rod 16 that is arranged on supporter 20 inside.As shown in Figure 1, the head 12 of valve 14 is hemispherical, and as a whole, valve 14 is mushroom.The sidewall of valve seat 11 is configured with radially projection 18 inwards, and the head 12 of valve 14 can form sealing with this projection 18 contact to prevent float collar 10 leakages.In confined state, guide rod 16 inserts in the pilot hole 27 of supporters 20 bottoms the motion with guiding valve 14.In addition, between the bottom of the head 12 of valve 14 and supporter 20, also be provided with elastic component 15 so that valve 14 can move vertically automatically.In one embodiment, elastic component 15 is spring.
Float collar 10 also comprises the installation lock ring 30 that can hold supporter 20, and lock ring 30 is used for supporting and installation supporter 20 supports and install whole float collar 10 thereby install.As shown in Figure 1, the height of installation lock ring 30 is identical with the height of locating piece 24.The side less area that lock ring 30 only covers supporter 20 is installed like this, has guaranteed that float collar 10 has bigger area of passage.
Fig. 3 has shown installation lock ring 30 with 3-D view.The inner surface that lock ring 30 is installed is provided with the groove 31 that the locating piece 24 with supporter 20 is complementary.When assembling, locating piece 24 is snapped in the installation that can finish float collar 10 in the groove 31, install simple and convenient.In a preferred embodiment, locating piece 24 is the wedge of attenuation gradually towards the downstream, and groove 31 is the slope groove with the wedge coupling.In another embodiment, lock ring 30 is installed is had breach 33, namely as a whole, lock ring 30 is installed is roughly letter C shape.In addition, on the external surface that lock ring 30 is installed, also be provided with anti-rotation groove 32.When boring except float collar 10, the rotation that these technical characterictics of locating piece 24 and installation lock ring 30 help to prevent from installing lock ring 30, this will describe in detail hereinafter.
Fig. 4 has schematically shown according to the installment state of float collar mentioned above 10 in pipe string 40.Pipe string 40 comprises box cupling 41, and upstream portion is connected with sleeve pipe 42 in the inside of box cupling 41, and the downstream part is connected with sleeve pipe 43.In installment state, lock ring 30 is installed is in the gap between the sleeve pipe 42,43, and the upstream face of locating piece 24 engages with upstream sleeve pipe 42.In one embodiment, the internal diameter of lock ring 30 is installed greater than the internal diameter of sleeve pipe 42, can upstream face can be engaged with upstream sleeve pipe 42 to guarantee locating piece 24.Box cupling 41 and sleeve pipe 42, the 43rd, those skilled in the art is known, for simplicity, repeats no more here.
When float collar 10 was subjected to bigger buffer brake, because locating piece 24 is engaged in upstream sleeve pipe 42, so float collar 10 did not have the danger of motion upstream.In addition, locating piece 24 is engaged in upstream sleeve pipe 42 also no longer to be needed valve seat 11 is fixedlyed connected with sleeve pipe, has made things convenient for float collar 10 to install.
In order to improve the anti-back pressure ability of float collar 10, the circumferential wall external surface of valve seat 11 and upstream sleeve pipe 42 inner surfaces are sealed and matched.In one embodiment, the circumferential wall external surface of valve seat 11 is provided with lip ring 44, has realized being sealed and matched of valve seat 11 and sleeve pipe 42.
According to Fig. 4 the installation steps of float collar 10 in pipe string 40 are described below.
At first, downstream sleeve pipe 43 and box cupling 41 are assembled together, are lowered to float collar 10 then.After the installation lock ring 30 of float collar 10 sits on the downstream sleeve pipe 43, upstream sleeve pipe 42 and box cupling 41 are assembled together, float collar 10 can not move axially with regard to being installed in the gap between upstream sleeve pipe 42 and the downstream sleeve pipe 43 like this.Valve seat 11 also forms sealing with upstream sleeve pipe 42, thereby prevents float collar 10 back pressure.
When needs bore except float collar 10, apply active force towards the downstream by the drill bit (not shown) to float collar 10.Towards the downstream motion, downstream is thinner because the upstream extremity of locating piece 24 is thicker and lock ring 30 is installed for having the C shape of breach 33, therefore can promote to install lock ring 30 expanded radiallys when supporter 20 moves towards the downstream under this active force for supporter 20.After being arranged on the anti-rotation groove 32 installed on lock ring 30 external surfaces and the inwall of box cupling 41 contact, can effectively prevent the rotation of float collar 10, help the brill of float collar 10 to remove.
Though with reference to preferred embodiment the utility model is described, under the situation that does not break away from scope of the present utility model, can carries out various improvement and can replace wherein parts with equivalent it.Especially, only otherwise have structural hazard, every technical characterictic of mentioning among each embodiment all can combine in any way.The utility model is not limited to disclosed specific embodiment in the literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (10)
1. a float collar is characterized in that, comprises
Valve seat,
Supporter, its upstream portion is connected in described valve seat downstream part, and the downstream part of described supporter is made of many ribs, and described many ribs intersect in the bottom of described supporter and are provided with pilot hole in the intersection, exterior face at described rib is configured with the locating piece that radially outward protrudes
Be provided with the valve that comprises head and guide rod in described supporter inside, the guide rod of described valve inserts in the described pilot hole, the head of described valve can contact with the circumferential pars intramuralis face sealing of described valve seat, between the bottom of the head of described valve and described supporter, also be provided with the elastic component that supports described valve
Also comprise the installation lock ring that can hold described supporter.
2. float collar according to claim 1 is characterized in that, described installation lock ring has breach.
3. float collar according to claim 2 is characterized in that, is provided with the groove that is complementary with described locating piece at the inner surface of described installation lock ring.
4. float collar according to claim 3 is characterized in that, described locating piece is the wedge of attenuation gradually towards the downstream, and described groove is the slope groove with described wedge coupling.
5. float collar according to claim 4 is characterized in that, the height of described installation lock ring is identical with the height of described locating piece.
6. float collar according to claim 5 is characterized in that, also is provided with anti-rotation groove on the external surface of described installation lock ring.
7. float collar according to claim 6 is characterized in that, is provided with negative thread in the upstream portion of described supporter, is provided with the pin thread that is complementary with described negative thread in the downstream part of described valve seat.
8. float collar according to claim 7 is characterized in that, described elastic component is spring.
9. a use is according to the pipe string of each described float collar among the claim 1-8, it is characterized in that, described pipe string comprises box cupling, box cupling upstream portion the inboard inboard and downstream part all is connected with sleeve pipe, described installation lock ring is in the gap between described two sleeve pipes, and the upstream face of described locating piece engages with the upstream sleeve pipe.
10. pipe string according to claim 9 is characterized in that, between the circumferential wall external surface of described valve seat and the described internal surface of casing for being sealed and matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320030807 CN203214003U (en) | 2013-01-21 | 2013-01-21 | Float collar and pipe string using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320030807 CN203214003U (en) | 2013-01-21 | 2013-01-21 | Float collar and pipe string using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203214003U true CN203214003U (en) | 2013-09-25 |
Family
ID=49203550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320030807 Expired - Lifetime CN203214003U (en) | 2013-01-21 | 2013-01-21 | Float collar and pipe string using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203214003U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742103A (en) * | 2014-01-02 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Double guide rod coercing reset type float collar |
| CN105275408A (en) * | 2014-06-24 | 2016-01-27 | 中国石油化工股份有限公司 | Float collar |
| CN112253045A (en) * | 2020-12-08 | 2021-01-22 | 中国石油天然气集团有限公司 | Sliding sleeve type impacting seat |
-
2013
- 2013-01-21 CN CN 201320030807 patent/CN203214003U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742103A (en) * | 2014-01-02 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Double guide rod coercing reset type float collar |
| CN103742103B (en) * | 2014-01-02 | 2016-09-14 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Double guide rod coercing reset type float collar |
| CN105275408A (en) * | 2014-06-24 | 2016-01-27 | 中国石油化工股份有限公司 | Float collar |
| CN112253045A (en) * | 2020-12-08 | 2021-01-22 | 中国石油天然气集团有限公司 | Sliding sleeve type impacting seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |