CN203978376U - The special float shoe of a kind of equal diameter drilling well expansion sleeve - Google Patents
The special float shoe of a kind of equal diameter drilling well expansion sleeve Download PDFInfo
- Publication number
- CN203978376U CN203978376U CN201420314563.3U CN201420314563U CN203978376U CN 203978376 U CN203978376 U CN 203978376U CN 201420314563 U CN201420314563 U CN 201420314563U CN 203978376 U CN203978376 U CN 203978376U
- Authority
- CN
- China
- Prior art keywords
- shear pin
- pin seat
- seal
- float shoe
- expansion sleeve
- Prior art date
- 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 - Fee Related
Links
Abstract
The utility model relates to the special float shoe of a kind of equal diameter drilling well expansion sleeve, float shoe mechanism is positioned at lower shell, comprise seal, valve, return spring and sealing ring, seal is fixed on the lower end of shear pin seat and is loop configuration, the lower surface of seal is processed with taper seat, valve is hemispherical, and seal lower surface and valve form unidirectional conical surface seal; In upper shell, have a columniform shear pin seat of ladder, shear pin seat is provided with centre bore, and the outer wall of shear pin seat coordinates with upper shell inwall is movable, in the centre bore on shear pin seat top, is plugged with insertion pipe, and insertion pipe is fixed on by upper shear pin in the centre bore of shear pin seat; Be arranged with guiding pipe nipple outward at insertion pipe, guiding pipe nipple is annular.The hole diameters such as the utility model is expansion sleeve generation expand and then realize without internal diameter loss and creep into a kind of feasibility and precondition are provided; Also have sealing tight, the feature that security reliability is high, in well cementing process, can play the equally distributed effect of current limliting and mud simultaneously.
Description
Technical field
The utility model relates to a kind of oil, gas drilling instrument, particularly the special float shoe of a kind of equal diameter drilling well expansion sleeve.
Background technology
Equal diameter drilling well process refers to utilizes identical drill column structure and size to form identical well, is then lowered to step by step the casing expandable of same size to design size well cementation, thereby forms the borehole size that adopts same diameter from top layer to target zone.Expansion sleeve technology refer to by under tubing string in well, with the method for machinery or hydraulic pressure, make tubing string generation permanent plastic deformation, make well or flow string internal diameter expand.Originally, expansion sleeve is purely as the follow-up solution of one of drilling problem, as casing patching, sidetracked hole completion etc., but along with the development of this technology, now be applied in casing programme design and drilling plan, extensive use in high angle hole, horizontal well, deep-well and thermal production well, and obtain extensively accreditation.
Equal diameter drilling well is the same with conventional drilling, needs to cement the well after being lowered to sleeve pipe, and therefore bunch tube bottom need to be connected with cementing float shoe.Conventional cementing float shoe is mainly made up of float shoe body and one way valve.The Main Function of cementing float shoe is to stop drilling fluid to enter in sleeve pipe, and produces buoyancy to alleviate derrick load; After cementing finishes, stop cement paste to reflux, ensure that cement returns height.Common expansion sleeve operation is the external diameter of expansion sleeve to be expand into identical with the internal diameter of basic sleeve pipe, but the basic sleeve pipe of overlay region is without any expansion.Adopt expansion sleeve to realize single or nested type and expand to change casing programme, can improve hole diameter utilization rate, significantly reduce the tapering of conventional well, but this expansion fashion will cause dwindling of borehole diameter.
Refer to and in drilling process, adopt as far as possible all the time a certain drill bit and drilling tool specification Deng hole diameter expansion sleeve technology, thereby in full well drilling process, keep the boring method of a certain borehole size.This technology can be avoided expanding casing programme in drilling process, can solve a drilling well difficult problem for the bad grounds such as leakage stratum, high pressure formation, Thin Film Flows lost territory layer.Obtain and the well of previous same size, continue to creep into the drill bit of same size.The present invention aims to provide the special float shoe of a kind of equal diameter expansion sleeve, to assist the needed fixing float shoe of the process such as equal diameter drilling well, expansion sleeve.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, provides a kind of equal diameter drilling well expansion sleeve special float shoe, for the hole diameters such as expansion sleeve generation expand and then realize without internal diameter loss and creep into a kind of feasibility and precondition are provided; Also have sealing tight, the feature that security reliability is high, in well cementing process, can play the equally distributed effect of current limliting and mud simultaneously.
Its technical scheme is: comprise insertion pipe, upper shell, guiding pipe nipple, shear pin seat, lower shell, float shoe mechanism and spring base, described float shoe mechanism is positioned at lower shell, float shoe mechanism comprises valve, return spring and seal, sealing ring, seal is fixed on the lower end of shear pin seat and is loop configuration, the lower surface of seal is processed with taper seat, valve is hemispherical, and seal lower surface and valve form unidirectional conical surface seal; Described lower shell is hemispherical dome structure, and its bottom is provided with through hole; Upper shell is cylindrical, and its upper end is provided with external screw thread, has a columniform shear pin seat of ladder in upper shell, and shear pin seat is provided with centre bore, and the outer wall of shear pin seat coordinates with upper shell inwall is movable, and by safe shear pin, shear pin seat is fixed in upper shell; In the centre bore on shear pin seat top, be plugged with insertion pipe, insertion pipe is fixed in the centre bore of shear pin seat by upper shear pin.
Above-mentioned guiding pipe nipple is annular, and guiding pipe nipple upper end has conical centre bore.
Between upper shell and guiding pipe nipple, be provided with three sealing rings, between insertion pipe and shear pin seat, be provided with three sealing rings, between seal and upper shell, be provided with sealing ring.
On above-mentioned valve external surface, be fixed with one deck elastic packing rubber layer, on the taper seat of seal, be fixed with the close rubber layer of one deck elasticity.
Above-mentioned valve is that elasticity oil resistant rubber is made.
Be arranged with guiding pipe nipple outward at insertion pipe, shear pin seat upper end is threaded in the central screw hole of guiding pipe nipple lower end.
The beneficial effects of the utility model are: upper shell of the present utility model is up-narrow and down-wide, for tieback equal diameter expansion sleeve, for the hole diameters such as expansion sleeve generation expand and then realize without internal diameter loss and creep into a kind of feasibility and precondition are provided; Also have sealing tight, the feature that security reliability is high, in well cementing process, can play the equally distributed effect of current limliting and mud simultaneously.Meanwhile, can in the time of cementing well, provide the well cementation passage of cement, effectively avoid the reverse reflux of cementing concrete, can ensure cementing quality; In the time of expansion operation, can make again highly pressurised liquid enter and suppress chamber, the inflation channel of highly pressurised liquid is provided.Therefore, can meet the construction process requirement of the equal diameter drilling well of the operation of expanding after first cementing well, improve the feasibility of integral construction.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model;
In upper figure: insertion pipe 1, upper shell 2, guiding pipe nipple 3, shear pin seat 4, safe shear pin 5, lower shell 6, upper shear pin 7, valve 8, float shoe mechanism 9, return spring 10, seal 11, sealing ring 12.
Detailed description of the invention
By reference to the accompanying drawings 1, the utility model will be further described:
The utility model comprises insertion pipe 1, upper shell 2, guiding pipe nipple 3, shear pin seat 4, lower shell 6, float shoe mechanism 9 and spring base, described float shoe mechanism 9 is positioned at lower shell 6, float shoe mechanism 9 comprises valve 8, return spring 10 and seal 11, sealing ring 12, seal 11 is fixed on the lower end of shear pin seat 4 and is loop configuration, the lower surface of seal 11 is processed with taper seat, valve 8 is hemispherical, and seal 11 lower surfaces and valve 8 form unidirectional conical surface seal; Described lower shell 6 is hemispherical dome structure, and its bottom is provided with through hole; Upper shell 2 is cylindrical, its upper end is provided with external screw thread, has a columniform shear pin seat 4 of ladder in upper shell 2, and shear pin seat is provided with centre bore, the outer wall of shear pin seat 4 coordinates with upper shell 2 inwalls are movable, and by safe shear pin 5, shear pin seat 4 is fixed in upper shell 2; In the centre bore on shear pin seat 4 tops, be plugged with insertion pipe 1, insertion pipe 1 is fixed in the centre bore of shear pin seat 4 by upper shear pin 7; Outside insertion pipe 1, be arranged with guiding pipe nipple 3, shear pin seat 4 upper ends are threaded in the central screw hole of guiding pipe nipple 3 lower ends.
Above-mentioned guiding pipe nipple 3 is annular, and guiding pipe nipple 3 upper ends have conical centre bore.
Between upper shell 2 and guiding pipe nipple 3, be provided with three sealing rings, between insertion pipe 1 and shear pin seat 4, be provided with three sealing rings, between seal 11 and upper shell 2, be provided with sealing ring.
On above-mentioned valve 8 external surfaces, be fixed with one deck elastic packing rubber layer, on the taper seat of seal 11, be fixed with the close rubber layer of one deck elasticity.
Above-mentioned valve 8 is made for elasticity oil resistant rubber.
In order to improve the sealing between seal and cylindrical shell, between seal and upper shell, there is sealing ring, simultaneously in order to improve the sealing between valve and seal, can on valve, apply one deck elastic packing rubber layer.In the time of cement injection, the in-house valve of float shoe relies on the pressure of cement injection to open, and after C.I.P, by return spring return, plays the effect of closing, sealing.
When cementing well, cement flows into float shoe mechanism by insertion pipe centre bore, and under the effect of pressure, valve moves downward, expose the discharge orifice of valve below, cement flows out from discharge orifice, then flows out by the through hole on lower shell, enters into the annular space of sleeve pipe and the bore hole borehole wall.
After well cementation, while expanding operation, on carry insertion pipe and cut off insertion pipe and shear pin seat between upper shear pin, in continuation, carry insertion pipe to departing from guiding pipe nipple, now insertion pipe lower end seal failure, thereby make highly pressurised liquid enter the annular space between insertion pipe and upper shell by insertion pipe, liquid enters suppresses chamber, for expansion operation provides power source.
Claims (6)
1. the special float shoe of equal diameter drilling well expansion sleeve, it is characterized in that: comprise insertion pipe (1), upper shell (2), guiding pipe nipple (3), shear pin seat (4), lower shell (6), float shoe mechanism (9) and spring base, described float shoe mechanism (9) is positioned at lower shell (6), float shoe mechanism (9) comprises valve (8), return spring (10) and seal (11), sealing ring (12), seal (11) is fixed on the lower end of shear pin seat (4) and is loop configuration, the lower surface of seal (11) is processed with taper seat, valve (8) is hemispherical, seal (11) lower surface and valve (8) form unidirectional conical surface seal, described lower shell (6) is hemispherical dome structure, and its bottom is provided with through hole, upper shell (2) is cylindrical, its upper end is provided with external screw thread, in upper shell (2), there is a columniform shear pin seat of ladder (4), shear pin seat is provided with centre bore, the outer wall of shear pin seat (4) coordinates with upper shell (2) inwall is movable, and by safe shear pin (5), shear pin seat (4) is fixed in upper shell (2), in the centre bore on shear pin seat (4) top, be plugged with insertion pipe (1), insertion pipe (1) is fixed in the centre bore of shear pin seat (4) by upper shear pin (7).
2. the special float shoe of a kind of equal diameter drilling well expansion sleeve according to claim 1, is characterized in that: described guiding pipe nipple (3) is annular, and guiding pipe nipple (3) upper end has conical centre bore.
3. the special float shoe of a kind of equal diameter drilling well expansion sleeve according to claim 1, it is characterized in that: between upper shell (2) and guiding pipe nipple (3), be provided with three sealing rings, between insertion pipe (1) and shear pin seat (4), be provided with three sealing rings, between seal (11) and upper shell (2), be provided with sealing ring.
4. the special float shoe of a kind of equal diameter drilling well expansion sleeve according to claim 1, is characterized in that: on described valve (8) external surface, be fixed with one deck elastic packing rubber layer, be fixed with the close rubber layer of one deck elasticity on the taper seat of seal (11).
5. the special float shoe of a kind of equal diameter drilling well expansion sleeve according to claim 4, is characterized in that: described valve (8) is made for elasticity oil resistant rubber.
6. the special float shoe of a kind of equal diameter drilling well expansion sleeve according to claim 1, is characterized in that: outside insertion pipe (1), be arranged with guiding pipe nipple (3), shear pin seat (4) upper end is threaded in the central screw hole of guiding pipe nipple (3) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314563.3U CN203978376U (en) | 2014-06-13 | 2014-06-13 | The special float shoe of a kind of equal diameter drilling well expansion sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314563.3U CN203978376U (en) | 2014-06-13 | 2014-06-13 | The special float shoe of a kind of equal diameter drilling well expansion sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978376U true CN203978376U (en) | 2014-12-03 |
Family
ID=51975835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420314563.3U Expired - Fee Related CN203978376U (en) | 2014-06-13 | 2014-06-13 | The special float shoe of a kind of equal diameter drilling well expansion sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978376U (en) |
-
2014
- 2014-06-13 CN CN201420314563.3U patent/CN203978376U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102071900B (en) | Custom-pressure expandable naked eye packer | |
| CN201883994U (en) | Self-pressure-retaining expansion open hole packer | |
| CN102979495A (en) | Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof | |
| CN105971537B (en) | A kind of deblocking Refloatation method of retrievable bridge plug solution sealing mechanism | |
| CN202882841U (en) | Pipe external packer capable of being self-expandable when encountering water or oil | |
| CN206769867U (en) | A kind of fill-type external packer of pipe | |
| CN202300266U (en) | Operation device for expansion casing with equal borehole diameter | |
| CN205823223U (en) | A kind of well head annular space sealing device | |
| CN204941345U (en) | A kind of radial well transfer with packing function | |
| CN203978376U (en) | The special float shoe of a kind of equal diameter drilling well expansion sleeve | |
| CN205225226U (en) | Sleeve pipe sliding sleeve fracturing production integration tubular column | |
| CN201050340Y (en) | Double-walled drilling faucet | |
| CN201024988Y (en) | An overflow leakage flowing ball base | |
| CN204677156U (en) | The special float shoe of a kind of equal diameter drilling well expansion sleeve | |
| CN201723196U (en) | Self-sealing setting ball seat | |
| CN105401931A (en) | Integrated pipe column for casing pipe sliding sleeve fracturing production and fracturing production method for casing pipe sliding sleeve | |
| CN204571854U (en) | Middle matter oil leakage loses well test string | |
| CN204238902U (en) | A kind of down-hole bypass ball-and-seat | |
| CN101881142B (en) | Self-sealing setting ball seat | |
| CN204663508U (en) | Oil gas well cementing operation staged fracturing sliding sleeve starter gate valve | |
| CN202483513U (en) | Sliding sleeve for separate layer reconstruction | |
| CN202108464U (en) | Cementing float shoe special for an equal diameter drilling well | |
| CN2784580Y (en) | Hydraulic locking packer | |
| CN101906950A (en) | Large-size float shoe for monohole expandable casing | |
| CN109989735B (en) | Hydraulic releasing multi-cluster perforation combined fracturing sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20150613 |
|
| EXPY | Termination of patent right or utility model |