CN205422634U - Float shoe is used in well cementation - Google Patents
Float shoe is used in well cementation Download PDFInfo
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- CN205422634U CN205422634U CN201521070951.2U CN201521070951U CN205422634U CN 205422634 U CN205422634 U CN 205422634U CN 201521070951 U CN201521070951 U CN 201521070951U CN 205422634 U CN205422634 U CN 205422634U
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- float shoe
- well cementation
- well
- tail pipe
- eccentric head
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Abstract
The utility model provides a float shoe is used in well cementation, it includes: hollow structure's body, setting are in the inside check valve of body and with the eccentric head that the one end of body is connected. According to the utility model discloses a float shoe is used in well cementation, it is including the eccentric head that has the guide effect. When the tail pipe cluster goes into to meet the step well down, rotate the tail pipe cluster and drive the float shoe and rotate. The float shoe is rotating the in -process, and its eccentric head can be crossed the step and then drive the tail pipe and gang up the step well to what make tail pipe cluster transfers that everything goes well with your work goes on, has reduced the degree of difficulty that the tail pipe cluster was transferred, guarantees the tail pipe cluster and transfers the smooth and easy nature and the reliability of process.
Description
Technical field
This utility model relates to petroleum machinery, particularly relates to a kind of well cementation float shoe.
Background technology
Float shoe is a kind of instrument utilizing buoyancy to reach to alleviate sleeve pipe gravity, it is arranged on the bottom of sleeve pipe, a similar ball-and-seat, that is liquid can flow to outside from inside, inside can not be entered, so, when transferring sleeve pipe from outside, mud inside well will sleeve pipe by float shoe support always, thus reaches to alleviate the purpose of sleeve pipe gravity.In drilling liner cementing is constructed, float shoe directly affects cementing quality as the device of bottom in well cementing pipe string, its performance.
But, prior art has the disadvantage in that the float shoe of routine passes through difficulty when running into step well, causes the difficulty entered under tail pipe big.
Utility model content
Technical problem to be solved in the utility model is to overcome in prior art conventional float shoe when running into step well by difficulty, the deficiency that the difficulty that enters under tail pipe is big.
For the problems referred to above, the utility model proposes a kind of well cementation float shoe, comprising: the body of hollow structure, the check valve being arranged on described body interior and the eccentric head being connected with one end of described body.
According to well cementation float shoe of the present utility model, it eccentric head including there is guide effect.When entering to run into step well under tail pipe string, rotate tail pipe string and drive float shoe to rotate.Float shoe in rotation process, its eccentric head can cross step so that drive tail pipe string by step well so that tail pipe string transfer that everything goes well with your work is carried out, reduce the difficulty that tail pipe string is transferred, it is ensured that the smoothness of tail pipe string decentralization process and reliability.
In one embodiment, it is provided with cement layer between valve body and the inwall of described body of described check valve.Be provided with the float shoe of cement layer relative in prior art the internal conventional float shoe for aluminum material, cement layer bore except property is good, thus bore except during cement layer required brill except the time short, bore except difficulty is low, shorten the engineering time, reduce well cementing operation cost.
In one embodiment, the inwall of described body is provided with circumferentially extending annular groove.After cement injection in float shoe, cement can fill the annular groove on body, thus the cement layer formed after theing cement solidifies and the firm and reliable connection of body, will not come off from body easily.
In one embodiment, the groove face of described annular groove is set to rough matsurface.The groove face of annular groove forms rough matsurface, increases the adhesive force between cement layer and body, further such that be more securely attached together between cement layer and body.
In one embodiment, the inwall of described body is provided with the helical groove of the axial screw extension along described body.After cement layer coordinates with helical groove, cement layer can bear the impact of axial force and radial force, improves cement layer positional stability in the body further
In one embodiment, the groove face of described helical groove is rough matsurface.The groove face of helical groove is set to rough matsurface, further increases the adhesive force between cement layer and body.
In one embodiment, the outer surface of described body is provided with spiral fin, the outer surface of described spiral fin is provided with hard alloy particle.The hard alloy particle arranged on the outer surface of spiral fin, improves the intensity of spiral fin, improves the cutting power of spiral fin, avoid spiral fin rapid wear simultaneously, improve the grinding performance of float shoe.
In one embodiment, it is formed with space between described check valve and eccentric head, is provided with, between two adjacent described spiral fins, the flowing hole being connected with described space, thus increases the inflow-rate of water turbine of liquid, liquid within float shoe is crossed quickly and flows in well, improve efficiency of construction.
In one embodiment, described body is threadeded with eccentric head, facilitates the dismounting of body and eccentric head.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, this utility model will be described in more detail.
Fig. 1 is the overall structure schematic diagram of the float shoe of this utility model embodiment.
Fig. 2 is the sectional structure schematic diagram of the float shoe of this utility model embodiment.
Fig. 3 is the float shoe operating diagram in the step well of this utility model embodiment.
Fig. 4 is the sectional structure schematic diagram of an embodiment of the body of the float shoe of this utility model embodiment.
Fig. 5 is the sectional structure schematic diagram of another embodiment of the body of the float shoe of this utility model embodiment.
In the accompanying drawings, identical parts use identical reference.Accompanying drawing is not drawn according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, the well cementation of this utility model embodiment float shoe 10, the eccentric head 12 being connected with one end of body 11 including the body 11 of tubular hollow structure, be arranged on the check valve 13 within body 11 and be arranged on the inwall of check valve 13 and body 11 between cement layer 14.The other end of body 11 is used for union tail string 97.
During as it is shown on figure 3, run into step well in tail pipe string 97 decentralization process, rotary tail string 97, thus tail pipe string 97 can drive the float shoe 10 being provided with eccentric head 12 to rotate.The top of eccentric head 12 is the sharp protuberance of the axis of deviation body 11.The eccentric head 12 of float shoe 10 is in rotation process, its top can be crossed step and then drive tail pipe string 97 to enter second-order stair shaft eye from the first ladder well, so that tail pipe string 97 transfer that everything goes well with your work is carried out, reduce the difficulty that tail pipe string 97 is transferred, it is ensured that the smoothness of tail pipe string 97 decentralization process and reliability.
As in figure 2 it is shown, check valve 13 includes valve body and spool.Annular space is formed between outer surface and the inwall of body 11 of valve body.Cement injection in annular space, check valve 13 can be played fixation by the cement layer 14 formed after theing cement solidifies, it is ensured that the positional stability of check valve 13.Cement cost taken by themselves is low and easily processed into type, thus reduces the overall processing cost of manufacture of float shoe 10.It addition, in the present embodiment, the float shoe 10 of internal filling concrete layer 14 is internal relative in prior art is the conventional float shoe of aluminum material, cement layer 14 bore except property is good, thus bore except cement layer 14 time required brill except the time short, bore except difficulty is low, shorten the engineering time, reduce well cementing operation cost.
As shown in Figure 4, the inwall of body 11 is provided with the circumferentially extending annular groove 112 along body 11.Preferably, inwall is provided with the axially in parallel multiple annular grooves 112 being distributed side by side along body 11.After cement injection in annular space, cement can fill the annular groove 112 on body 11, thus the cement layer 14 formed after theing cement solidifies and the firm and reliable connection of body 11, will not come off from body 11 easily.Further, the groove face of annular groove 112 processes through brushing process or processes screw thread so that groove face forms rough matsurface, increases the adhesive force between cement layer 14 and body 11, further reinforced cementitious layer 14 and the connection of body 11.
In another embodiment, as it is shown in figure 5, be provided with the helical groove 113 of the axial screw extension along body 11 on the inwall of body 11.Cement is filled in helical groove 113, make to solidify on the outer surface of the cement layer 14 formed and form spiral helicine projection, thus cement layer 14 and the firm and reliable connection of body 11, and spiral helicine projection and helical groove 113 coordinate the impact that can bear axial force and radial force, improve the positional stability of cement layer 14 further.Preferably, the groove face of helical groove 113 processes through brushing process or processes screw thread so that groove face forms rough matsurface, further increases the adhesive force between cement layer 14 and body 11, improves the reliability and stability connected.
As it is shown in figure 1, be provided with spiral fin 111 on the outer peripheral face of body 11.When running into well necking segment in tail pipe string 97 decentralization process, rotary tail string 97, tail pipe string 97 can drive float shoe 10 to rotate.When float shoe 10 rotates, the spiral fin 111 of float shoe 10 can grinding well with expand well diameter, thus complete unblocking work so that tail pipe string 97 can pass through well necking segment to be continued to transfer work.Weld (such as surfacing) on the outer surface of spiral fin 111 and have metallic particles 111a, improve the intensity of spiral fin 111, improve the cutting power of spiral fin 111, avoid spiral fin 111 rapid wear simultaneously, improve the grinding performance of float shoe 10.Preferably, metallic particles 111a includes hard alloy particle.Hard alloy has that hardness is high, wear-resisting, intensity and a series of premium properties such as toughness is preferable, heat-resisting, corrosion-resistant.
As in figure 2 it is shown, be formed with space 99 between check valve 13 and eccentric head 12.The flowing hole 98 being connected with this space 99 it is provided with in the eccentric head 12 of float shoe 10.It is also equipped with the flowing hole 98 being connected with this space 99 between two adjacent spiral fins 111, thus increases the inflow-rate of water turbine of liquid so that the liquid within float shoe 10 is crossed quickly and flowed in well, improves efficiency of construction.Flowing hole 98 has the effect guiding liquid flowing, and the liquid of tail pipe string 97 delivered inside can be opened check valve 13 and be entered in well by flowing hole 98.
In one embodiment, it is provided with external thread section in eccentric head 12, it is provided with the internal thread segment matched with this external thread section on body 11, thus couples together threadably between eccentric head 12 and body 11, facilitate the dismounting of body 11 and eccentric head 12.
The well cementation of this utility model embodiment float shoe 10, including having the eccentric head 12 of guide effect, having the spiral fin 111 of ablation.Tail pipe string 97 connects the well cementation of upper the present embodiment with after float shoe 10, in the decentralization process of tail pipe string 97, when running into step well (as shown in Figure 3) or well necking segment, it is no longer necessary to carry tail pipe string 97 up and down to carry out unblocking, but drive float shoe 10 to rotate by step well (eccentric head 12 of rotation can cross step well) or well necking segment (the spiral fin 111 of rotation can grinding well necking segment to expand its diameter) by rotary tail string 97, thus the sloshing pressures produced when avoiding carrying up and down tail pipe string 97, improve the unblocking ability of tail pipe string 97, ensure that below tail pipe string 97, speed relaxes, easy pressure break fragility stratum can be passed through.Filling concrete layer 14 in the float shoe 10 of the present embodiment, conveniently completes work and bores except float shoe 10, shorten and bore except the time, reduce well cementing operation cost.
Although this utility model being described by reference to preferred embodiment, but in the case of without departing from scope of the present utility model, it can be carried out various improvement and parts therein can be replaced with equivalent.Especially, as long as there is not structural hazard, the every technical characteristic being previously mentioned in each embodiment all can combine in any way.This utility model is not limited to specific embodiment disclosed herein, but includes all technical schemes fallen within the scope of the appended claims.
Claims (9)
1. a well cementation float shoe, it is characterised in that including:
The body of hollow structure, the check valve being arranged on described body interior and the eccentric head being connected with one end of described body.
Well cementation float shoe the most according to claim 1, it is characterised in that be provided with cement layer between valve body and the inwall of described body of described check valve.
Well cementation float shoe the most according to claim 1, it is characterised in that be provided with circumferentially extending annular groove on the inwall of described body.
Well cementation float shoe the most according to claim 3, it is characterised in that the groove face of described annular groove is set to rough matsurface.
Well cementation float shoe the most according to claim 1, it is characterised in that be provided with the helical groove of the axial screw extension along described body on the inwall of described body.
Well cementation float shoe the most according to claim 5, it is characterised in that the groove face of described helical groove is rough matsurface.
Well cementation float shoe the most according to claim 1, it is characterised in that be provided with spiral fin on the outer surface of described body, the outer surface of described spiral fin is provided with hard alloy particle.
Well cementation float shoe the most according to claim 7, it is characterised in that be formed with space between described check valve and eccentric head, be provided with, between two adjacent described spiral fins, the flowing hole being connected with described space.
Well cementation float shoe the most according to claim 1, it is characterised in that described body is threadeded with eccentric head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521070951.2U CN205422634U (en) | 2015-12-21 | 2015-12-21 | Float shoe is used in well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521070951.2U CN205422634U (en) | 2015-12-21 | 2015-12-21 | Float shoe is used in well cementation |
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| Publication Number | Publication Date |
|---|---|
| CN205422634U true CN205422634U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521070951.2U Active CN205422634U (en) | 2015-12-21 | 2015-12-21 | Float shoe is used in well cementation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761472A (en) * | 2016-12-29 | 2017-05-31 | 德州汉隆石油设备有限公司 | Self- steering covers tube vibration guide shoe |
| CN107859485A (en) * | 2017-11-21 | 2018-03-30 | 中国石油集团西部钻探工程有限公司 | Rotate freely float shoe assembly |
| CN108756778A (en) * | 2018-05-14 | 2018-11-06 | 中国石油集团西部钻探工程有限公司 | Oblique surface guide shoe |
-
2015
- 2015-12-21 CN CN201521070951.2U patent/CN205422634U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761472A (en) * | 2016-12-29 | 2017-05-31 | 德州汉隆石油设备有限公司 | Self- steering covers tube vibration guide shoe |
| CN107859485A (en) * | 2017-11-21 | 2018-03-30 | 中国石油集团西部钻探工程有限公司 | Rotate freely float shoe assembly |
| CN108756778A (en) * | 2018-05-14 | 2018-11-06 | 中国石油集团西部钻探工程有限公司 | Oblique surface guide shoe |
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