CN206655678U - A kind of special float shoe of Novel equal-diameter drilling well - Google Patents
A kind of special float shoe of Novel equal-diameter drilling well Download PDFInfo
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- CN206655678U CN206655678U CN201720411803.5U CN201720411803U CN206655678U CN 206655678 U CN206655678 U CN 206655678U CN 201720411803 U CN201720411803 U CN 201720411803U CN 206655678 U CN206655678 U CN 206655678U
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- float shoe
- pressure valve
- spring
- drilling well
- diameter drilling
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Abstract
The utility model discloses a kind of special float shoe of Novel equal-diameter drilling well, including body, one end of the body is fixedly connected with float shoe guiding cap, the internal thread being adapted with sleeve external thread is offered in the inner chamber of body afterbody, the inside of the body is provided with back-pressure valve, back-pressure valve is made up of installing plate, spoiler, sealed ball seat, the gaily decorated basket, club, ball sealer, spring and fastening screw, installing plate is fixedly connected in the inner chamber of body afterbody, and sealed ball seat is fixedly connected with the opening of spoiler.The special float shoe of Novel equal-diameter drilling well of the present utility model, by installing back-pressure valve in body, back-pressure valve uses Spring driving back-pressure valve pattern, ball sealer is pushed a displacement by the pressure of circulating mud, after termination of pumping, make ball sealer be in close contact to form sealing with sealed ball seat in the presence of spring, avoid the liquid in back-pressure valve setting of casing or in sleeve pipe outer ring space from backflowing, reliability is high.
Description
Technical field
The attachment field of petroleum gas well cementation is the utility model is related to, specially a kind of Novel equal-diameter drilling well is special
Use float shoe.
Background technology
Float shoe is the instrument of the casing part during oil gas well cementing operation, and float shoe is removed to realize " bruising ", prevents plug
It is outer to continue traveling downwardly effect, also one effect is exactly " back pressure valve ", that is, is prevented in set extratubal fluid sleeve pipe.Old-fashioned float shoe
During back pressure valve setting of casing, in order that full of mud, it is necessary to from sleeve opening artificial on rig floor in sleeve pipe, this not only increases
Workload, setting of casing speed is had an effect on, if grouting time is long, moving casing not in time, is also easy to that the viscous card thing of sleeve pipe occurs
Therefore use is very unreliable.
Utility model content
The purpose of this utility model is to provide a kind of special float shoe of Novel equal-diameter drilling well, possesses high excellent of reliability
Point, solve and accident easily occurs in the prior art use insecure problem.
To achieve the above object, the utility model provides following technical scheme：
A kind of special float shoe of Novel equal-diameter drilling well, including body, one end of the body are fixedly connected with float shoe guiding
Cap, offers the internal thread being adapted with sleeve external thread in the inner chamber of body afterbody, and the inside of the body is provided with back
Pressure valve, back-pressure valve are made up of installing plate, spoiler, sealed ball seat, the gaily decorated basket, club, ball sealer, spring and fastening screw, installation
Plate is fixedly connected in the inner chamber of body afterbody, and installing plate is fixedly connected with spoiler by fastening screw, in the opening of spoiler
Place is fixedly connected with sealed ball seat, and the spoiler and sealed ball seat are fixedly connected with one end of the gaily decorated basket, the gaily decorated basket it is interior
Portion is provided with club, and the gaily decorated basket is run through in one end of club, and the other end of club, which is screwed, is connected with ball sealer, sealing
Ball contacts connection with sealed ball seat, and spring is cased with the outer surface of club, and one end of spring contacts company with the inwall of the spring
Connect, the other end of spring contacts connection with ball sealer.
Preferably, the float shoe guiding cap is hemispherical cementing head.
Preferably, filled between the gaily decorated basket of the body and back-pressure valve using oil-well cement.
Preferably, the body is made of alloy steel material.
Preferably, the sealed ball seat is in inverted cone shape.
Preferably, the centre of the installing plate, spoiler, sealed ball seat and float shoe guiding cap offers circular hole.
Compared with prior art, the beneficial effects of the utility model are as follows：
The special float shoe of Novel equal-diameter drilling well of the present utility model, by installing back-pressure valve in body, back-pressure valve uses
Ball sealer is pushed a displacement, made after termination of pumping, in the presence of spring close by Spring driving back-pressure valve pattern, the pressure of circulating mud
Blocking is in close contact to form sealing with sealed ball seat, avoids the liquid in back-pressure valve setting of casing or in sleeve pipe outer ring space from returning
Stream, reliability are high.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
In figure：1 body, 11 internal threads, 2 float shoes guiding cap, 3 back-pressure valves, 31 installing plates, 32 spoilers, 33 sealed ball seats,
34 gailys decorated basket, 35 clubs, 36 ball sealers, 37 springs, 38 fastening screws.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, a kind of special float shoe of Novel equal-diameter drilling well, including body 1, body 1 use alloy steel material system
Into corrosion-resistant and high-temperature resistant, service life is grown, and one end of body 1 is fixedly connected with float shoe guiding cap 2, and float shoe guiding cap 2 is hemisphere
Shape cementing head, float shoe guide cap 2 to be transferred to guiding sleeve, and the flowing of annular space drilling fluid is kept during setting of casing, makes sleeve pipe suitable
Profit is gone into the well；A certain amount of drilling fluid can be emptied during setting of casing, in the presence of buoyancy, casing string can be made to suspend, is mitigated
Derrick load, offers the internal thread 11 being adapted with sleeve external thread in the inner chamber of the afterbody of body 1, and body 1 passes through interior spiral shell
The external screw thread of the connection sleeve pipe of line 11, whole float shoe is set to be arranged on the bottom of sleeve pipe, the inside of body 1 is provided with back-pressure valve 3, back pressure
Valve 3 drives back-pressure valve pattern using spring 37, and the pretightning force of spring 37 is moderate, and the face kiss-coating of ball sealer 36, back pressure sealing effectiveness is excellent,
Be particularly suitable for use in horizontal well and High angle degree well, and reliability is high, is filled out between the gaily decorated basket 34 of body 1 and back-pressure valve 3 using oil-well cement
Fill, oil-well cement by the gaily decorated basket 34 flow out body 1, back-pressure valve 3 by installing plate 31, spoiler 32, sealed ball seat 33, the gaily decorated basket 34,
Club 35, ball sealer 36, spring 37 and fastening screw 38 are formed, and installing plate 31 is fixedly connected in the inner chamber of the afterbody of body 1, peace
Loading board 31 is fixedly connected with spoiler 32 by fastening screw 38, ensures the stability of connection, and spoiler 32 can prevent cement mortar
Backflowed Deng fluid, be fixedly connected with sealed ball seat 33 in the opening of spoiler 32, sealed ball seat 33 is in inverted cone shape, it is ensured that sealing
Effect is good, and installing plate 31, spoiler 32, sealed ball seat 33 and float shoe guide the centre of cap 2 to offer circular hole, ensures cement mortar
It can be flowed through from top to bottom Deng fluid, spoiler 32 and sealed ball seat 33 are fixedly connected with one end of the gaily decorated basket 34, the gaily decorated basket 34
Be internally provided with club 35, the gaily decorated basket 34 is run through in one end of club 35, and club 35 can be movable on the gaily decorated basket 34, club 35 it is another
End, which is screwed, is connected with ball sealer 36, and ball sealer 36 contacts connection, ball sealer 36 and sealed ball seat with sealed ball seat 33
33 are in close contact the reliability height for preventing the fluids such as cement mortar from backflowing, using, and spring 37, spring are cased with the outer surface of club 35
37 play a part of reset, and one end of spring 37 contacts connection, the other end and the ball sealer 36 of spring 37 with the inwall of spring 37
Contact connection, out-of-date in fluid streams such as cement mortars, ball sealer 36 separates with sealed ball seat 33, and downward compression spring 37, when having
When the fluids such as cement mortar backflow, spring 37, which resets, makes ball sealer 36 be in close contact formation sealing with sealed ball seat 33, can be effective
Prevent the fluids such as cement mortar from backflowing, use reliability is good.
The special float shoe of this Novel equal-diameter drilling well, body 1 are connected to the bottom of sleeve pipe, when just putting sleeve pipe, liquid pair in well
Float shoe non-resistance, the float shoe guiding guiding sleeve of cap 2 is downward, and ball sealer 36 is pushed a displacement, club by the pressure of circulating mud
Three card valves of 35 tail ends fall automatically, after termination of pumping, ball sealer 36 is in close contact with sealed ball seat 33 in the presence of spring 37
Form sealing, play a part of check valve, now, drilling fluid or cement mortar can be pumped into from top to bottom, in the setting of casing of back-pressure valve 3 or
Liquid in sleeve pipe outer ring space can not all return.
In summary：The special float shoe of this Novel equal-diameter drilling well, by installing back-pressure valve 3 in body 1, back-pressure valve 3 is adopted
Back-pressure valve pattern is driven with spring 37, ball sealer 36 is pushed a displacement, after termination of pumping, the work of spring 37 by the pressure of circulating mud
Ball sealer 36 is in close contact with sealed ball seat 33 under and form sealing, avoid in the setting of casing of back-pressure valve 3 or sleeve pipe outer ring is empty
Interior liquid backflows, and reliability is high.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of special float shoe of Novel equal-diameter drilling well, including body (1), it is characterised in that：One end of the body (1) is fixed
Float shoe guiding cap (2) is connected with, the internal thread being adapted with sleeve external thread is offered in the inner chamber of body (1) afterbody
(11), the inside of the body (1) is provided with back-pressure valve (3), and back-pressure valve (3) is by installing plate (31), spoiler (32), ball sealer
Seat (33), the gaily decorated basket (34), club (35), ball sealer (36), spring (37) and fastening screw (38) composition, installing plate (31) are fixed
It is connected in the inner chamber of body (1) afterbody, installing plate (31) is fixedly connected with spoiler (32) by fastening screw (38), in choked flow
The opening of plate (32) is fixedly connected with sealed ball seat (33), and the spoiler (32) and sealed ball seat (33) are fixedly connected with
One end of the gaily decorated basket (34), the gaily decorated basket (34) are internally provided with club (35), and the gaily decorated basket is run through in one end of club (35)
(34), the other end of club (35), which is screwed, is connected with ball sealer (36), and ball sealer (36) connects with sealed ball seat (33)
Connection is touched, spring (37) is cased with the outer surface of club (35), one end of spring (37) contacts with the inwall of the spring (37)
Connection, the other end of spring (37) contact connection with ball sealer (36).
A kind of 2. special float shoe of Novel equal-diameter drilling well according to claim 1, it is characterised in that：The float shoe guides cap
(2) it is hemispherical cementing head.
A kind of 3. special float shoe of Novel equal-diameter drilling well according to claim 1, it is characterised in that：The body (1) and
Filled between the gaily decorated basket (34) of back-pressure valve (3) using oil-well cement.
A kind of 4. special float shoe of Novel equal-diameter drilling well according to claim 1, it is characterised in that：The body (1) is adopted
It is made of alloy steel material.
A kind of 5. special float shoe of Novel equal-diameter drilling well according to claim 1, it is characterised in that：The sealed ball seat
(33) it is in inverted cone shape.
A kind of 6. special float shoe of Novel equal-diameter drilling well according to claim 1, it is characterised in that：The installing plate
(31), the centre of spoiler (32), sealed ball seat (33) and float shoe guiding cap (2) offers circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720411803.5U CN206655678U (en) | 2017-04-18 | 2017-04-18 | A kind of special float shoe of Novel equal-diameter drilling well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720411803.5U CN206655678U (en) | 2017-04-18 | 2017-04-18 | A kind of special float shoe of Novel equal-diameter drilling well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206655678U true CN206655678U (en) | 2017-11-21 |
Family
ID=60318210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720411803.5U Active CN206655678U (en) | 2017-04-18 | 2017-04-18 | A kind of special float shoe of Novel equal-diameter drilling well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206655678U (en) |
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2017
- 2017-04-18 CN CN201720411803.5U patent/CN206655678U/en active Active
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