CN207420487U - Hanger hyoplastron valve type sealing shroud - Google Patents
Hanger hyoplastron valve type sealing shroud Download PDFInfo
- Publication number
- CN207420487U CN207420487U CN201721339825.1U CN201721339825U CN207420487U CN 207420487 U CN207420487 U CN 207420487U CN 201721339825 U CN201721339825 U CN 201721339825U CN 207420487 U CN207420487 U CN 207420487U
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- China
- Prior art keywords
- sealing sleeve
- central tube
- sealing
- joint body
- wall
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- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 96
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims 3
- 239000012530 fluid Substances 0.000 abstract description 9
- 239000004568 cement Substances 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 239000011083 cement mortar Substances 0.000 abstract 2
- 229920002472 Starch Polymers 0.000 abstract 1
- 235000019698 starch Nutrition 0.000 abstract 1
- 239000011440 grout Substances 0.000 description 7
- 239000002002 slurry Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model discloses a kind of hanger hyoplastron valve type sealing shrouds, including the central tube, left-hand tool joint body and sealing shroud being closely set with successively from inside to outside, and the hyoplastron of sealing shroud bottom side is movably connected in by torsional spring, hyoplastron is enable to block the central through hole of sealing shroud under the action of torsional spring after central tube is extracted out；Wherein, the length of central tube is more than the length of left-hand tool joint body, and the length of left-hand tool joint body is more than the length of sealing shroud；The hanger hyoplastron valve type sealing shroud can cement the well is protected a pair of of the sealing surface and sealing ring of check valve using central tube when injecting cement mortar well; from the erosion of high-voltage high-speed fluid; and after cemented up starches proposition central tube; pass through effective closing of hyoplastron; cement mortar returns after solving the problems, such as the float collar float plug failure of pipe string lower end, ensures the cementing quality of tail pipe, saves drilling period; drilling cost is reduced, providing good construction for subsequent job ensures.
Description
Technical Field
The utility model relates to a well completion operation technical field is fixed to oil and gas trade, in particular to tongue plate valve type seal cover for hanger.
Background
The liner hanger is an indispensable well cementing tool in liner well cementing construction operation, has large using amount and wide use range, and is an indispensable part for the matched use of the liner hanger and the float collar and the float shoe. The float collar float shoe acts as a one-way valve allowing fluid to flow from the interior of the string to the annular space outside the string, but preventing fluid from flowing out of the annulus into the string. Once the float collar float shoe is failed, namely the one-way valve in the float collar float shoe is out of order, the conventional sealing sleeve is adopted, and the cement paste in the air can only freely flow back into the pipe string according to the U-shaped pipe effect because the specific gravity of the cement paste in the air is greater than that of the drilling fluid in the pipe string until the internal and external pressures of the pipe string are balanced. The cement slurry in the outer ring of the pipe string is reduced, the stratum to be sealed cannot be sealed, even if other remedial measures are adopted, the well cementation quality cannot be guaranteed at all, and the subsequent construction operation is also seriously influenced.
Because the cementing construction operation of the liner hanger belongs to special operation, the floating collar and the floating shoe cannot adopt a mode of poor pressure and coagulation like other cementing operations after the floating collar and the floating shoe are failed; the inner material of the floating collar floating shoe is made of drillable material with lower hardness, in addition, the floating collar floating shoe is connected to the bottommost part of the pipe string, the bottom temperature is higher, the floating collar floating shoe works under the erosion of high-pressure drilling fluid for a long time, and the drilling fluid contains gravel with different sizes, so the phenomenon that the floating collar floating shoe fails often occurs. Therefore, how to ensure that the sealing surface of the one-way valve cannot be eroded in the high-speed flowing process of the fluid, the one-way valve cannot be eroded in the whole process of circulating mud and injecting mud, and the problem that the cement paste returns after the float collar float shoe fails is a technical problem in the existing well cementation operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an it provides one kind and overcomes prior art's not enough provides one kind and gets up a pair of sealed face of unidirectional valve and the fine protection of sealing washer and make its tongue plate valve formula seal cover for hanger that is not eroded to solve float collar float shoe and lose efficacy back grout and fall back the tongue plate valve formula seal cover for hanger of problem.
Therefore, the utility model discloses technical scheme as follows:
a tongue plate valve type sealing sleeve for a hanger comprises a central pipe, a left-hand thread joint body, a sealing sleeve and a tongue plate movably connected to one side of the bottom of the sealing sleeve, wherein the central pipe, the left-hand thread joint body and the sealing sleeve are sequentially and tightly sleeved from inside to outside; the length of the central tube is greater than that of the back-off joint body, and the length of the back-off joint body is greater than that of the sealing sleeve; two earrings are arranged on one side of the bottom surface of the seal sleeve, two strip-shaped connecting pieces are formed by extending from the side wall of one side of the tongue plate, and end parts of the two strip-shaped connecting pieces are provided with radial through holes, so that the two earrings and the two strip-shaped connecting pieces are movably connected through pin shafts which are arranged in the radial through holes and the earrings in a penetrating manner; and a torsion spring is further arranged on the pin shaft in a penetrating manner, a torsion arm at one side of the torsion spring is fixed on the bottom surface of the sealing sleeve, and the other end of the torsion arm is fixed on the bottom surface of the tongue plate, so that the tongue plate can block the central through hole of the sealing sleeve under the action of the torsion spring after the central pipe is drawn out.
Furthermore, an annular boss is arranged on the outer wall of the top end of the central tube, and conical surfaces which are matched with each other are respectively machined on the lower end face of the annular boss and the upper end face of the sealing sleeve.
Furthermore, an annular boss is arranged on the outer wall of the bottom end of the sealing sleeve, and an annular step matched with the annular boss is arranged on the inner wall of the back-off joint body, so that the annular boss of the sealing sleeve abuts against the lower end face of the annular step on the inner wall of the back-off joint body; at least one first sealing ring is arranged between the sealing sleeve and the reverse-buckled joint body, so that sealing is formed between the sealing sleeve and the reverse-buckled joint body.
Furthermore, at least one second sealing ring is arranged between the sealing sleeve and the central pipe, so that sealing is formed between the sealing sleeve and the central pipe.
Furthermore, conical surfaces which are matched with each other are respectively processed on the inner wall of the bottom end of the sealing sleeve and the outer wall of the top end of the tongue plate, and a third sealing ring is arranged on the conical surface of the sealing sleeve, so that sealing is formed between the sealing sleeve and the tongue plate.
This tongue plate valve formula seal cover for hanger forms a check valve structure through mutually supporting between tongue plate and the seal cover, realizes utilizing the center tube to get up the fine protection of a pair of sealed face and the sealing washer of check valve when well cementation injection grout, avoids the erosion of high-pressure high-speed fluid, and after the grout is put forward the center tube after having been annotated, tongue plate formula check valve structure can effectively be closed, has solved the problem that the grout flows back after the pipe cluster lower extreme float collar float shoe became invalid, guarantee the well cementation quality of tail pipe, practice thrift the drilling cycle, reduce the drilling cost, provide good construction guarantee for follow-up operation.
Drawings
Fig. 1 is a schematic structural diagram of a tongue plate valve type sealing sleeve for a hanger in a well entering state;
fig. 2 is a schematic structural view of the flap valve type seal cover for a hanger according to the present invention in a state where the center tube is lifted and the door is closed.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
As shown in figure 1, the flap valve type sealing sleeve for the hanger comprises a central tube 11, a back-off joint body 16, a sealing sleeve 1 and a flap 9 movably connected to one side of the bottom of the sealing sleeve 1, wherein the central tube, the back-off joint body and the sealing sleeve 1 are tightly sleeved from inside to outside in sequence.
Wherein, the length of the central tube 11 is longer than that of the back-off joint body 16, and the length of the back-off joint body 16 is longer than that of the sealing sleeve 1. When in use, the upper part of the hanger 18 is sleeved on the inner side of the left-hand thread joint body 16, and the top end of the hanger 18 is propped against the bottom surface of the sealing sleeve 1; and then the cone 14 and the hanger slips 13 are tightly sleeved on the outer wall of the hanger 18 below the left-hand thread joint body 16 from top to bottom, so that the hanger can be normally put into use.
Specifically, two earrings 6 are arranged on one side of the bottom surface of the sealing sleeve 1, two strip-shaped connecting pieces are formed by extending from the side wall of one side of the tongue plate 9, and end parts of the two strip-shaped connecting pieces are provided with radial through holes, so that the two earrings 6 and the two strip-shaped connecting pieces are movably connected through pin shafts 7 which are arranged in the radial through holes and the earrings in a penetrating manner; a torsion spring 8 is further arranged on the pin shaft 7 in a penetrating manner, a torsion arm at one side of the torsion spring 8 is fixed on the bottom surface of the sealing sleeve 1, and the other end of the torsion arm is fixed on the bottom surface of the tongue plate 9, so that the tongue plate 9 can block the central through hole of the sealing sleeve 1 under the action of the torsion spring 8 after the central tube 11 is drawn out.
In order to facilitate the installation of the central tube 11 into the central through hole of the sealing sleeve 1 and avoid the central tube 11 from slipping from the central through hole of the sealing sleeve 1, an annular boss is arranged on the outer wall of the top end of the central tube 11, and the lower end face of the annular boss and the upper end face of the sealing sleeve 1 are respectively processed with conical surfaces which are matched with each other.
An annular boss is arranged on the outer wall of the bottom end of the sealing sleeve 1, an annular step matched with the annular boss is arranged on the inner wall of the back-off joint body 16, the annular boss of the sealing sleeve 1 is abutted against the lower end face of the annular step on the inner wall of the back-off joint body 16, the upward movement of the sealing sleeve 1 is limited, and a hanger 18 arranged at the lower part supports the sealing sleeve 1 when in use, so that a downward limiting structure is formed; in addition, in order to ensure that the sealing performance of the whole device is good, two first sealing rings 2 are arranged between the sealing sleeve 1 and the left-handed joint body 16 at intervals, so that sealing is formed between the sealing sleeve 1 and the left-handed joint body 16; in addition, a second sealing ring 3 is arranged between the sealing sleeve 1 and the central tube 11, so that the sealing sleeve 1 and the central tube 11 form a seal.
In order to ensure that the tongue plate 9 and the plug are good in sealing performance when the central tube 11 is drawn out, the inner wall of the bottom end of the sealing sleeve 1 and the outer wall of the top end of the tongue plate 9 are respectively provided with a conical surface which are matched with each other, and the third sealing ring 5 is arranged on the conical surface of the sealing sleeve 1, so that sealing is formed between the sealing sleeve 1 and the tongue plate 9, and the problem that cement paste is poured back is avoided.
The operating principle of the flapper valve type sealing sleeve for the hanger is as follows:
as shown in fig. 1, when the device is installed in a well, because a central tube 11 inserted into a central through hole of a sealing sleeve 1 pushes a tongue plate 9 away, a conical surface 4 formed on the inner wall of the bottom end of the sealing sleeve, a third sealing ring 5 and a sealing surface 10 formed on the outer wall of the top end of the tongue plate are all positioned outside the central tube 11;
when the hanger 18 is set to a preset position according to the well cementation design and then carries out the whole process of the operation of circulating slurry and injecting slurry, the slurry or the slurry which has higher pressure and flows at high speed only flows through the inner hole 12 of the central pipe, and the fluid can not be contacted with the conical surface 4 formed on the inner wall of the bottom end of the sealing sleeve, the third sealing ring 5 and the sealing surface 10 formed on the outer wall of the top end of the tongue plate completely, therefore, the conical surface 4 formed on the inner wall of the bottom end of the sealing sleeve, the third sealing ring 5 and the sealing surface 10 formed on the outer wall of the top end of the tongue plate can not be eroded and damaged; meanwhile, the structural design ensures that the hanger is far away from the bottom of the well and is in an environment with low well temperature, so that the third sealing ring 5 cannot be damaged due to the influence of a high-temperature environment;
as shown in fig. 2, after cement slurry is injected and the central tube 11 is lifted, the tongue plate 9 is automatically turned over under the action of the torsion spring 8, and the sealing surface 10 formed on the outer wall of the top end of the tongue plate is attached to the conical surface 4 formed on the inner wall of the bottom end of the sealing sleeve and is sealed by the third sealing ring 5. In case the float collar float shoe of taking place the tube cluster lower extreme became invalid and resulted in the problem that the grout of tube cluster outer annulus returned to the intraductal, the grout that returns can make the sealed face 10 that forms on the outer wall of hyoplastron top be bigger to the laminating pressure of the conical surface 4 that forms on the inner wall of seal cover bottom, and sealed effect is better, makes the problem that the check valve that forms between hyoplastron 9 in the hanger and the seal cover 1 can not become invalid, has guaranteed promptly that the grout can not appear falling the phenomenon of returning to the top, and well cementation tail pipe quality has obtained effective guarantee.
Claims (5)
1. A flap valve type sealing sleeve for a hanger is characterized by comprising a central tube (11), a back-off joint body (16), a sealing sleeve (1) and a flap (9) movably connected to one side of the bottom of the sealing sleeve (1), wherein the central tube, the back-off joint body and the sealing sleeve are sequentially and tightly sleeved from inside to outside; wherein,
the length of the central tube (11) is greater than that of the back-off joint body (16), and the length of the back-off joint body (16) is greater than that of the sealing sleeve (1);
two earrings (6) are arranged on one side of the bottom surface of the sealing sleeve (1), two strip-shaped connecting pieces are formed by extending from the side wall of one side of the tongue plate (9), and end parts of the two strip-shaped connecting pieces are provided with radial through holes, so that the two earrings (6) and the two strip-shaped connecting pieces are movably connected through pin shafts (7) which are arranged in the radial through holes and the earrings in a penetrating manner; a torsion spring (8) is further arranged on the pin shaft (7) in a penetrating mode, a torsion arm on one side of the torsion spring (8) is fixed to the bottom surface of the sealing sleeve (1), the other end of the torsion arm is fixed to the bottom surface of the tongue plate (9), and the tongue plate (9) can be used for plugging the central through hole of the sealing sleeve (1) under the action of the torsion spring (8) after the central pipe (11) is drawn out.
2. The flapper valve type seal cartridge for a hanger according to claim 1, wherein an annular boss is provided on the outer wall of the top end of the central tube (11), and the lower end face of the annular boss and the upper end face of the seal cartridge (1) are respectively processed with conical surfaces that are fitted to each other.
3. The flapper valve type seal cartridge for a hanger according to claim 1, wherein the outer wall of the bottom end of the seal cartridge (1) is provided with an annular boss, the inner wall of the back-off connector body (16) is provided with an annular step which is matched with the annular boss, so that the annular boss of the seal cartridge (1) abuts against the lower end face of the annular step on the inner wall of the back-off connector body (16); at least one first sealing ring (2) is arranged between the sealing sleeve (1) and the back-off joint body (16), so that sealing is formed between the sealing sleeve (1) and the back-off joint body (16).
4. A flapper valve type gland for a hanger according to claim 1, characterised in that at least one second sealing ring (3) is provided between the gland (1) and the central tube (11) to form a seal between the gland (1) and the central tube (11).
5. The flapper valve type seal cartridge for a hanger according to claim 1, wherein the inner wall of the bottom end of the seal cartridge (1) and the outer wall of the top end of the flapper (9) are respectively processed with mutually matched conical surfaces, and a third seal ring (5) is arranged at the conical surface of the seal cartridge (1) to form a seal between the seal cartridge (1) and the flapper (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339825.1U CN207420487U (en) | 2017-10-18 | 2017-10-18 | Hanger hyoplastron valve type sealing shroud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339825.1U CN207420487U (en) | 2017-10-18 | 2017-10-18 | Hanger hyoplastron valve type sealing shroud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207420487U true CN207420487U (en) | 2018-05-29 |
Family
ID=62311708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721339825.1U Expired - Fee Related CN207420487U (en) | 2017-10-18 | 2017-10-18 | Hanger hyoplastron valve type sealing shroud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207420487U (en) |
-
2017
- 2017-10-18 CN CN201721339825.1U patent/CN207420487U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211116 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |