CN2250417Y - High-pressure fishing crashing casing plug - Google Patents
High-pressure fishing crashing casing plug Download PDFInfo
- Publication number
- CN2250417Y CN2250417Y CN 95232650 CN95232650U CN2250417Y CN 2250417 Y CN2250417 Y CN 2250417Y CN 95232650 CN95232650 CN 95232650 CN 95232650 U CN95232650 U CN 95232650U CN 2250417 Y CN2250417 Y CN 2250417Y
- Authority
- CN
- China
- Prior art keywords
- crashing
- pressure
- plug
- thimble plug
- drag
- 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
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- Earth Drilling (AREA)
Abstract
The utility model relates to a high-pressure fishing and crashing casing-tube plug which is a subsurface tool used for the oil exploitation of an oil field and is used for blocking an oil layer at the lower part in hydraulic crashing, and the high-pressure fishing and crashing casing-tube plug comprises a locking and controlling device, a seal assembly, an anchor part and a seal removing mechanism. Compared with the present crashing packer, the casing-tube plug has the advantages of reliable anchor and seal removing, good fishing, simple and compact structure and convenient operation, can also bear high operating pressure and high operating temperature, wherein the maximum operating pressure can reach 80MPa, and the operating temperature is 150 DEG. The utility model provides an ideal tool for the deep-layer hydraulic crashing operation of an oil field.
Description
The utility model relates to the high pressure that uses in the oil exploitation of a kind of oil field can drag for the pressure break thimble plug, is specially adapted to shutoff bottom oil reservoir in the deep layer fracturing of oil field.Belong to the downhole tool class.
The packing instrument that uses in the layering sleective fracturing tubing string in the prior art is generally sliding sleeve pressure break packer and support type packer.These two kinds of packers adopt gravity to cut off pin compression packing element usually, or the build the pressure structure of expansion packing element of steel ball is come Seal Oil cover annular space.Gum cover shrinks or the mode deblocking of pressure release by carrying on the gravity.Its design is outmoded, and overall performance is relatively poor.In use, the grappling difficulty often taking place, is difficult to deblocking, problem such as the sealing reliability coefficient is lower, have a strong impact on pressing crack construction normally carry out and construct after effect.Especially in the deep layer pressure break, capping tools of the prior art is difficult to bear high pressure, overslaugh the development of deep layer fracturing technique.In addition, pressure break capping tools of the prior art generally all can not be salvaged, thereby has improved cost of production.Abroad, though the existing bridging plug that can be used for this kind purposes, complex structure is made difficulty, costs an arm and a leg.
The purpose of this utility model be to propose a kind of can be used for oil field deep well fracturing well stimulation, have that very high bearing capacity, grappling deblocking are reliable, to salvage performance good, and the thimble plug of compact conformation.
High pressure of the present utility model can drag for the pressure break thimble plug by locking and control device, and seal assembly, anchor portion are conciliate sealing mechanism four parts and formed.
Locking and control device comprise the control section that the lock portion be made up of two pairs of notched teeths and twin-lock piece are formed.Two pairs of notched teeths of lock portion can make the cartridge of the thimble plug in the work and grappling slips be in seat envelope and grappling state all the time, and the twin-lock piece of control section can be controlled incorgruous bicone and coordinates to move axially, reach simultaneously radially, oblique promotion slips, guarantee that whole slips is anchored on the sleeve pipe.
Hermetic unit comprises whole cartridge and upper and lower rule ring.This assembly can bear the top pressure reduction of 60MPa and the bottom pressure reduction of 30MPa.
Anchor portion comprises 2 incorgruous cones and whole fast slips of double inclined plane and slip sleeve.It is positioned at the bottom of seal assembly, and main effect is to bear the sleeve pipe obturating plug thrust that upper and lower pressure reduction constitutes of being honored as a queen, and reaches the purpose of grappling thimble plug.Cone wherein is the cone of adjustable tapering.
Separate that sealing mechanism comprises mandrel, goes up drop handle, central tube, on carry pin and rubber spring.When on salvaging, carrying,, reach the purpose of deblocking by the interaction of these parts.
High pressure of the present utility model can drag for the pressure break thimble plug compared with prior art, has following advantage:
But 1,, improved the reliability of grappling and deblocking owing to used the cone of twin-lock block assembly and taper mutation;
2, owing to used rubber spring, coordinate incorgruous cone axis to the trend that moves in opposite directions in the not only present envelope, and in deblocking, coordinate the effect of deblocking in addition;
3, this thimble plug can bear very high operating pressure, reaches as high as 80MPa;
4, it is good to drag for performance, and under the normal condition, fishing success ratio can reach 100%;
5, compact conformation, easy to use.
The embodiment that provides below in conjunction with accompanying drawing 1 can drag for the pressure break thimble plug to high pressure of the present utility model and further describe.
High pressure in the present embodiment can drag for the pressure break thimble plug by retaining ring (1), mandrel (2), brake hoop (3), last rule rings (4), leather cup (5), packing element (6), central tube (7), following rule rings (8), last lock dog (9), upper cone (10), on carry pin (11), slips (12), spring (13), slip sleeve (14), lower cone (15), shear pin (16), spacing ring (17), shear pin (18), locating pin (19), spring packing element (20), jump ring (21), following lock dog (22), lock tube (23), seat envelope screw (24), last drop handle (25), staple (26), locating pin (27), plug (28), lower contact (29), grommet (30), sealing ring (31), (32) composition such as.
This high pressure can drag for the pressure break thimble plug and be used with seat envelope instrument, seat envelope protector and corresponding fisher at work, under the effect of hydraulic coupling and mechanical upper lifting force, makes this thimble plug finish seat envelope and deblocking in sleeve pipe.
When envelope seat, building the pressure starts a seat envelope instrument fluid cylinder assembly, promote locking device, seal assembly, upper cone, Shang watt cover and slips and move down, and lower cone is by moving in the promotion of seat envelope instrument upper lifting force.Under relative movement trend, cut off the thimble plug shear pin.Control incorgruous bicone by control device and coordinate to move axially in opposite directions, reach the radial push slips, whole slips is anchored on the sleeve pipe.Simultaneously, owing to the packing element of seal assembly is axially promoted to compress, finished the purpose of seat envelope.Seat envelope screw and thimble plug are thrown off then, trip out the above tubing string of an envelope instrument, and thimble plug is the seat envelope and is anchored in the sleeve pipe of projected depth.
During deblocking, following special-purpose fisher and thimble plug are carried connecting, and discharge the control pin of mandrel and central tube.When moving on the mandrel, at first make the upper and lower pressure reduction of thimble plug reach balance.Last drop handle drives on the central tube and moves the packing element deblocking.On carry nail and drive on the upper cone and move, the slips anchoring effect is removed.Last thimble plug can propose well head smoothly.
Claims (3)
1, the high pressure that uses in a kind of oil exploitation can drag for the pressure break thimble plug, comprise hermetic unit, anchor portion and deblocking part, it is characterized in that: this thimble plug also comprises locking device and control device, and locking device is made up of two pairs of notched teeths, and control device is made up of the twin-lock piece.
2, high pressure according to claim 1 can drag for the pressure break thimble plug, it is characterized in that: anchor portion is made of the incorgruous cone of adjustable tapering and double inclined plane monoblock slips and slip sleeve.
3, can drag for the pressure break thimble plug according to the described high pressure of claim 1 to 2, it is characterized in that: this thimble plug is by retaining ring (1), mandrel (2), brake hoop (3), last rule rings (4), leather cup (5), packing element (6), central tube (7), following rule rings (8), last lock dog (9), upper cone (10), on carry pin (11), slips (12), spring (13), slip sleeve (14), lower cone (15), shear pin (16), spacing ring) (17), shear pin (18), locating pin (19), spring packing element (20), jump ring (21), following lock dog (22), lock tube (23), seat envelope screw (24), last drop handle (25), staple (26), locating pin (27), plug (28), lower contact (29), grommet (30), sealing ring (31), (32) composition such as.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95232650 CN2250417Y (en) | 1995-11-06 | 1995-11-06 | High-pressure fishing crashing casing plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95232650 CN2250417Y (en) | 1995-11-06 | 1995-11-06 | High-pressure fishing crashing casing plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2250417Y true CN2250417Y (en) | 1997-03-26 |
Family
ID=33876968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95232650 Expired - Fee Related CN2250417Y (en) | 1995-11-06 | 1995-11-06 | High-pressure fishing crashing casing plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2250417Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206188A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Isolation packer |
| CN109138918A (en) * | 2018-09-26 | 2019-01-04 | 中国石油天然气股份有限公司 | Anchoring type full-soluble fracturing ball seat and use method thereof |
-
1995
- 1995-11-06 CN CN 95232650 patent/CN2250417Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206188A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Isolation packer |
| CN103206188B (en) * | 2013-04-22 | 2015-09-23 | 中国海洋石油总公司 | isolation packer |
| CN109138918A (en) * | 2018-09-26 | 2019-01-04 | 中国石油天然气股份有限公司 | Anchoring type full-soluble fracturing ball seat and use method thereof |
| CN109138918B (en) * | 2018-09-26 | 2024-07-30 | 中国石油天然气股份有限公司 | Anchoring type full-soluble fracturing ball seat and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |