CN202338263U - Self-sealing expansion cone for secondary expansion of expansion pipe - Google Patents
Self-sealing expansion cone for secondary expansion of expansion pipe Download PDFInfo
- Publication number
- CN202338263U CN202338263U CN2011204784325U CN201120478432U CN202338263U CN 202338263 U CN202338263 U CN 202338263U CN 2011204784325 U CN2011204784325 U CN 2011204784325U CN 201120478432 U CN201120478432 U CN 201120478432U CN 202338263 U CN202338263 U CN 202338263U
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- expansion
- sealing
- annular
- leather cup
- pipe
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Abstract
The utility model discloses a self-sealing expansion cone for secondary expansion of an expansion pipe. The self-sealing expansion cone is applicable to construction of an underground expansion pipe for oil drilling. An annular protruded shaft shoulder is arranged on the outer wall of a sealing cone seat; an expansion cone is arranged at the upper end of the annular protruded shaft shoulder of the sealing cone seat; an annular leather cup is arranged at the lower end of the annular protruded shaft shoulder of the sealing cone seat; the diameter of the outer wall of the leather cup is equal to the inner diameter of the expansion pipe; an annular limiting sealing block is arranged at the lower end of the leather cup; and a nut is arranged at the lower end of the annular limiting sealing block and fixed on the outer wall of the sealing cone seat. The self-sealing expansion cone for the secondary expansion of the expansion pipe has the advantages that after termination of pumping and pressure release of pipe expansion operation, when a pipe column is replaced and expansion pressure is re-established, a closed pressure cavity can be continuously formed between the pipe column and the expansion pipe, the expansion pressure is provided for the pipe expansion operation, the feasibility, reliability and economical efficiency of construction are improved, and drilling cost is effectively reduced.
Description
Technical field
The utility model relates to the petroleum drilling technology field, and particularly the expanded downhole pipe construction is a kind of self-sealing expansion awl that the reexpansion of well completion at equal borehole diameter process expansion tube is realized in the down-hole that is used for.
Background technology
In the oil drilling construction, after well completion at equal borehole diameter was meant and utilizes identical drill string assembly to form identical well, the expansion tube that is lowered to same size step by step expand into design size and well cementation, thereby forms the borehole size from surface pipe to the target zone same diameter.Well completion at equal borehole diameter technology can be improved traditional shaft building pattern, reduces oil gas well shaft building cost and raising shaft building security reliability, is one of the great new technology in 21 century oil gas well drilling engineering field.
At present, the well completion at equal borehole diameter construction technology mainly contains one-stroke expand tube and two kinds of technical systems of multiple-pass expand tube.Wherein, The technological merit of one-stroke expand tube system is mainly reflected in the whole hole diameter expansion work progress that waits of completion only needs a brill to accomplish; Two-layer sleeve pipe overlap only need carry out the expansion operation of conventional expansion tube; The expansion tube of overlap need not carry out reexpansion, thereby has reduced the performance parameter requirement to instrument and tubing, has reduced drilling cost.The core technology of well completion at equal borehole diameter technology is the solid expansion pipe technology.
In one-stroke expand tube construction, expansion tube will carry out reexpansion, and the tool combinations form of obviously conventional bloat tool shank and the mechanical expansion cone of entity such as can't satisfy at the needs of hole diameter wellbore construction.Therefore, the bloat tool combination needs configuration sealing awl that generally is used for well completion at equal borehole diameter.But conventional sealing awl can only form pressure chamber with expansion tube when first expand tube, for the expansion tube expansion provides first expand tube power.When technological requirement termination of pumping pressure release was also suppressed expand tube once more, conventional sealing awl can't be set up the seal-off pressure chamber with expansion tube once more, therefore continuous expand tube power can't be provided.The self-sealing expansion awl can substitute conventional sealing awl, can guarantee to form the seal-off pressure chamber with expansion tube continuously, for the operation of expansion tube expand tube expand tube power is provided continuously.
The utility model content
The purpose of the utility model is: a kind of self-sealing expansion awl of expansion tube reexpansion is provided, and assembling and dismounting realize the construction of expansion tube reexpansion in the well completion at equal borehole diameter process from movable sealing.
The technical scheme that the utility model adopts is: the self-sealing expansion awl of expansion tube reexpansion, mainly form by expansion cone, sealing awl seat, leather cup, spacing sealing block and nut.Sealing awl seat has centre bore for the cylinder bodily form, and it is the drilling rod internal thread that there are internal thread, the button-type of internal thread in sealing awl seat upper end, can be connected with drilling rod; There is external screw thread sealing awl seat lower end, and externally threaded button-type is the drilling rod external screw thread, but can be connected with reducing expansion cone upper end.The shaft shoulder that the protrusion of annular is arranged on the outer wall of sealing awl seat; On the shaft shoulder outer wall of sealing awl seat protrusion, sealing ring is arranged; Expansion cone is in the upper end of the annular shaft shoulder of sealing awl seat protrusion; It is characterized in that: the leather cup of annular is in the lower end of the annular shaft shoulder of sealing awl seat protrusion, and the outer diameter of leather cup is identical with the expansion tube internal diameter, and the spacing sealing block of annular is arranged in the lower end of leather cup; There is nut spacing sealing block lower end in annular, and nut is fixed on the outer wall of sealing awl seat, and the nut upper surface compresses spacing sealing block, and spacing sealing block makes leather cup abut against the soffit of the shaft shoulder of sealing awl seat 3 protrusions.
Described leather cup adopts the elastomeric material manufacturing, and sealing awl seat, spacing sealing block and nut all adopt Hardmetal materials and form through modified.
The self-sealing expansion awl course of work of summary expansion tube reexpansion.Consult Fig. 1.The self-sealing expansion awl of expansion tube reexpansion is positioned over expansion tube 1 inside, and the inclined-plane of expansion cone 2 is close to the inwall place of expansion tube 1 initial bubble position, makes self-sealing expansion awl and expansion tube form the seal-off pressure chamber, for the expand tube operation provides the bulbs of pressure.Expansion tube expands behind the segment distance, gets rid of single (thribble) because of technological requirement needs the termination of pumping pressure release.When connecting pipeline when suppressing expand tube once more; Highly pressurised liquid will act on the leather cup 4; The outer face of leather cup 4 is close to the inwall of expansion tube 1; And a certain amount of compression is arranged, and can guarantee continuously that bloat tool combination and expansion tube 1 form the seal-off pressure chamber, thereby construct the bulbs of pressure are provided for expand tube.Pressure will be delivered to sealing awl seat 3 and expansion cone 2 then; Make the inclined-plane of expansion cone 2 be close to the inwall place of expansion tube 1; Thereby form airtight pressure chamber; Carrying out expand tube for expansion cone 2 provides enough active forces, and the inwall of avoiding being close to expansion tube 1 because of the inclined-plane of expansion cone 2 can't be set up the seal-off pressure chamber.Because the maximum outside diameter of leather cup 4, therefore can guarantee leather cup 4 and the airtight pressure chamber of expansion tube 1 formation continuously greater than expansion tube 1 latus rectum, thereby but in the expansion tube expansion process, hydraulic coupling is provided for expansion cone expands to bore with the reducing awl.Therefore, when having realized on the inclined-plane of expansion cone 2 forming sealing, also can under the effect of leather cup 4, form new seal-off pressure chamber, thereby successfully carry out the expand tube operation with expansion tube 1.
The beneficial effect of the utility model: the self-sealing expansion awl of the utility model expansion tube reexpansion; After expand tube operation termination of pumping pressure release; When the replacing tubing string rebulids the bulbs of pressure, can guarantee continuously and expansion tube formation seal-off pressure chamber, for the expand tube operation provides the bulbs of pressure; Simultaneously, can avoid to set up the situation that the bulbs of pressure cause expand tube operation failure because of forming the seal-off pressure chamber between the expansion cone conical surface and the expansion tube.Therefore this self-sealing expansion awl can satisfy the construction process requirement of well completion at equal borehole diameter expansion tube reexpansion process, has improved feasibility, reliability and the economy of construction, effectively reduces drilling cost.
Description of drawings
Fig. 1 is the self-sealing expansion wimble structure generalized section of the utility model expansion tube reexpansion.
Among the figure, 1-expansion tube, 2-expansion cone, 3-sealing awl seat, 4-leather cup, the spacing sealing block of 5-, 6-nut.
The specific embodiment
Embodiment 1: the self-sealing expansion awl with an expansion tube reexpansion is an example, and the utility model is done further explain.
Consult Fig. 1.The self-sealing expansion awl of the utility model expansion tube reexpansion mainly is made up of expansion cone 2, sealing awl seat 3, leather cup 4, spacing sealing block 5 and nut 6.
Sealing awl seat 3 is for the cylinder bodily form has centre bore, and there is internal thread sealing awl seat 3 upper ends, and the button-type of internal thread is the drilling rod internal thread; There is external screw thread sealing awl seat 3 lower ends, and externally threaded button-type is the drilling rod external screw thread.The shaft shoulder that the protrusion of annular is arranged on the outer wall of sealing awl seat 3, the shaft shoulder external diameter of protrusion is identical with the internal diameter of the construction back expansion tube 1 that expands.On the shaft shoulder outer wall of sealing awl seat 3 protrusions, an O RunddichtringO is arranged.The upper end is the upper end of conical expansion cone 2 at the annular shaft shoulder of sealing awl seat 3 protrusions.
The leather cup 4 of annular is in the lower end of the annular shaft shoulder of sealing awl seat 3 protrusions, and the outer diameter of leather cup 4 is identical with expansion tube 1 internal diameter, and leather cup 4 adopts the elastomeric material manufacturing.The spacing sealing block 5 that annular is arranged in the lower end of leather cup 4.There is nut 6 spacing sealing block 5 lower ends in annular, and nut 6 is fixed on the outer wall of sealing awl seat 3, and nut 6 upper surfaces compress spacing sealing block 5, and spacing sealing block 5 makes leather cup 4 abut against the soffit of the shaft shoulder of sealing awl seat 3 protrusions.Sealing awl seat 3, spacing sealing block 5 and nut 6 carry out modifier treatment after all adopting Hardmetal materials and accomplishing processing.
Claims (2)
1. the self-sealing expansion of expansion tube reexpansion awl mainly is made up of expansion cone (2), sealing awl seat (3), leather cup (4), spacing sealing block (5) and nut (6); Sealing awl seat (3) has centre bore for the cylinder bodily form, and it is the drilling rod internal thread that there are internal thread, the button-type of internal thread in sealing awl seat (3) upper end; There is external screw thread sealing awl seat (3) lower end, and externally threaded button-type is the drilling rod external screw thread; The shaft shoulder that the protrusion of annular is arranged on the outer wall of sealing awl seat (3); On the shaft shoulder outer wall of sealing awl seat (3) protrusion, sealing ring is arranged; Expansion cone (2) is in the upper end of the annular shaft shoulder of sealing awl seat (3) protrusion; It is characterized in that: the leather cup (4) of annular is in the lower end of the annular shaft shoulder of sealing awl seat (3) protrusion, and the outer diameter of leather cup (4) is identical with expansion tube (1) internal diameter, and the spacing sealing block (5) of annular is arranged in the lower end of leather cup (4); There is nut (6) spacing sealing block (5) lower end in annular, and nut (6) is fixed on the outer wall of sealing awl seat (3), and nut (6) upper surface compresses spacing sealing block (5), and spacing sealing block (5) makes leather cup (4) abut against the soffit of the shaft shoulder of sealing awl seat (3) protrusion.
2. the self-sealing expansion awl of expansion tube reexpansion according to claim 1, it is characterized in that: described leather cup (4) adopts the elastomeric material manufacturing, and sealing awl seat (3), spacing sealing block (5) and nut (6) all adopt Hardmetal materials and form through modified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204784325U CN202338263U (en) | 2011-11-25 | 2011-11-25 | Self-sealing expansion cone for secondary expansion of expansion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204784325U CN202338263U (en) | 2011-11-25 | 2011-11-25 | Self-sealing expansion cone for secondary expansion of expansion pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202338263U true CN202338263U (en) | 2012-07-18 |
Family
ID=46486956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204784325U Expired - Fee Related CN202338263U (en) | 2011-11-25 | 2011-11-25 | Self-sealing expansion cone for secondary expansion of expansion pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202338263U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135243A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Equal-well-diameter expansion pipe anti-failure composite expansion tool |
-
2011
- 2011-11-25 CN CN2011204784325U patent/CN202338263U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135243A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Equal-well-diameter expansion pipe anti-failure composite expansion tool |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20201125 |