CN208845137U - Casing suspension device is used in secondary well cementation - Google Patents
Casing suspension device is used in secondary well cementation Download PDFInfo
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- CN208845137U CN208845137U CN201821553455.6U CN201821553455U CN208845137U CN 208845137 U CN208845137 U CN 208845137U CN 201821553455 U CN201821553455 U CN 201821553455U CN 208845137 U CN208845137 U CN 208845137U
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Abstract
Disclosed by the utility model is secondary well cementation casing suspension device, can quickly set up the sealed connection between the secondary well cementation small casing of petroleum industry casing damaged well and former casing, improve working efficiency, it is ensured that construction safety.Secondary well cementation casing suspension device includes small casing hanger and casing threeway, small casing hanger is equipped with upper suspension screw thread and lower suspension screw thread, casing threeway is equipped with former casing connection screw thread, and small casing hanger is mounted in the standpipe of casing threeway, is connected by jackscrew and sealed between the two by sealing ring；Small casing hanger top is consistent to the distance between casing threeway bottom end with the length of former casing pipe nipple.The utility model can satisfy the construction requirement of secondary well cementation, the total height of its suspension arrangement is consistent with former casing pipe nipple length, greatly facilitate casing damaged well using the secondary cementing operation of small casing, improve construction efficiency, effectively reduce construction cost, using effect is significant.
Description
Technical field
The utility model relates to the casing suspension device that petroleum industry administers casing damaged well, especially secondary well cementation is outstanding with casing
Hang device can quickly set up the sealed connection between secondary well cementation small casing and former casing, improve working efficiency, really
Protect construction safety.
Background technique
It as the exploitation in oil field enters the middle and later periods, is influenced by cementing quality and formation variation, casing damages increasingly
More, especially high-pressure water injection well, set damage degree are on the rise.Usually used subsidy means during administering slight casing damaged well,
The method that serious casing damaged well then uses secondary well cementation is administered, i.e., the tripping in small casing in damaged well inner sleeve.But secondary solid
Without suitable casing suspension device in the work progress of well, if cementing wellhead will be higher by routine using API standard casing head
It 0.5 meter of well head or more, makes troubles to job execution in the future and there are construction safety hidden danger；If not using API standard casing
Head needs the welding doughnut-shaped steel plate between small casing and former casing to be sealed and hang, this will be in well head fire operation
Construction, belongs to level-one and gets angry, there are security risks.
Therefore it is very necessary to develop a kind of secondary well cementation casing suspension device.
Summary of the invention
The purpose of the utility model is to provide secondary well cementation casing suspension devices, facilitate Downhole Construction, avoid because
Construction caused by well head is excessively high is inconvenient and the security risk buried, quickly set up secondary well cementation small casing and former casing it
Between sealed connection, improve construction efficiency, reduce production cost.
The technical solution of the utility model is: secondary well cementation casing suspension device includes small casing hanger and set
Pipe threeway, small casing hanger are equipped with upper suspension screw thread and lower suspension screw thread, and casing threeway is equipped with former casing connection screw thread, small
Casing hanger is mounted in the standpipe of casing threeway, is connected by jackscrew and sealed between the two by sealing ring；Small casing
Hanger top is consistent to the distance between casing threeway bottom end with the length of former casing pipe nipple.
The significant using effect of the utility model is: the utility model can satisfy the construction requirement of secondary well cementation, hang
The total height of hang device is consistent with former casing pipe nipple length, and the present apparatus utilizes sealing ring to seal secondary well cementation small casing and original
Annular space between casing does not improve well head height, does not need to provide just in well head hot work for job execution yet
Benefit and can ensure construction safety.It realizes under the premise of not increasing well head height, quickly establish between two-stage casing
Sealing, realizes the purpose of secondary well cementation.
The utility model greatly facilitate casing damaged well using the secondary cementing operation of small casing, improve construction efficiency, effectively
Construction cost is reduced, has significant using effect and application value and Social benefit and economic benefit significant.
Detailed description of the invention
Fig. 1 is the working principle diagram and structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing, not limits the protection scope of the utility model.It is as described below to be only
The preferred embodiment of the utility model, it is non-to limit the protection scope of the utility model, other with the utility model etc.
Effect variation, all should belong to the protection range of the utility model.
Referring to Fig. 1, secondary well cementation casing suspension device includes small casing hanger 4 and casing threeway 7, small casing suspension
Device 4 is equipped with upper suspension screw thread 1 and lower suspension screw thread 10, and casing threeway 7 is equipped with former casing connection screw thread 11, small casing hanger
4 are mounted in the standpipe of casing threeway 7, are connected by jackscrew 6 and sealed between the two by sealing ring 9；Small casing hanger 4
Top is consistent to the distance between 7 bottom end of casing threeway with the length of former casing pipe nipple, will not increase the height of wellhead assembly,
Job execution in the future and guarantee construction safety can be facilitated.
The body upper part of the small casing hanger 4 is equipped with upper suspension screw thread 1 and promotes internal screw thread 2, middle part ontology outer circle
Equipped with suspension step, which hangs the ontology outer circle below step and is equipped with jackscrew slot 3 in the top of casing threeway 7
With seal groove 8；The lower body outer circle of small casing hanger 4 is less than upper body outer circle and is equipped with tapering transition section, lower suspension
Screw thread 10 is located in the lower body outer circle of small casing hanger 4, connect with secondary well cementation with small casing.When small casing hanger
After 4 enter casing threeway 7, the assembling that jackscrew 6 completes the present apparatus is held out against, lower suspension screw thread 10 can be with secondary well cementation small casing
Quick connection group builds up the oil pipe channel in well.
The upper suspension screw thread 1 and promotion internal screw thread 2 of 4 body upper part of small casing hanger are respectively and under well head big four
Flange and lifting sub are threadedly coupled.It is upper suspension screw thread 1 is threadedly coupled with well head big four lower flange after, composition routine well head
Device promotes internal screw thread 2 and is threadedly coupled with lifting sub, can facilitate the secondary well cementation small casing tubing string in winding shaft.
The upper end inner circle of 7 standpipe of described sleeve pipe threeway is equipped with inner chamfer, can facilitate tripping in small casing hanger 4, standpipe
Upper portion pipe body is equipped with top wire hole 5, which is correspondingly arranged with the jackscrew slot 3 on small casing hanger 4, is packed into top wire hole 5
Jackscrew 6 be inserted into small casing hanger 4 on jackscrew slot 3 in；Former casing connection screw thread 11 is located under 7 standpipe of casing threeway
It is threadedly coupled above portion's outer circle, with former casing.
Jackscrew 6 in 7 riser upper tube body of described sleeve pipe threeway is at least packed into three, and jackscrew 6, which plays, prevents small casing outstanding
The risk that hanging device 4 is ejected from casing threeway 7.
Pass through threeway hoop 12 and clip 13 and gate valve 14 with the transverse tube outer end of standpipe perforation in described sleeve pipe threeway 7
Hoop connection.
The hoop of 14 other side of gate valve is connect by pipe line connection coupling 15 with the hoop of recovery line 16.
Concrete operations and application notice are as follows:
1, projected depth will be arrived under secondary well cementation small casing.
2, the wellhead assembly for dismantling casing damaged well unloads former casing pipe nipple.
3, the former casing connection screw thread 11 of 7 lower part of casing threeway is connected on former casing box cupling.
4, small casing hanger 4 is connect with secondary well cementation with small casing.
5, lubricating grease is smeared in the position of sealing ring 9 in small casing hanger 4.
6, it transfers small casing hanger 4, slowly enter it in casing threeway 7, complete secondary well cementation small casing and original
Sealing between casing.
7, it is connect, is established secondary with well head big four lower flange by upper suspension screw thread 1 on the top of small casing hanger 4
Wellhead assembly is used in well cementation.
8, gate valve 14 is connected in the transverse tube position of casing threeway 7 and flowed by the connection recycling of the hoop of recovery line 16
Journey.
9, secondary cementing operation is carried out according to detail design.
The embodiment described above is only exemplary embodiments, but the utility model is not limited only to these embodiments, ability
The technical staff in domain can make modification under the spirit and enlightenment without departing from the utility model.Aspect disclosed herein may
In the presence of many changes, combination and modification, and all in the scope of the utility model, therefore, protection scope is not limited only to above
Explanation.
Claims (7)
1. two well cementation casing suspension devices, characterized in that including small casing hanger and casing threeway, small casing hanger
Equipped with upper suspension screw thread and lower suspension screw thread, casing threeway is equipped with former casing connection screw thread, and small casing hanger is mounted on set
It connects in the standpipe of pipe threeway, between the two by jackscrew and is sealed by sealing ring；Small casing hanger top is to casing three
The distance between logical bottom end is consistent with the length of former casing pipe nipple.
2. secondary well cementation casing suspension device as described in claim 1, characterized in that the ontology of the small casing hanger
Top is equipped with upper suspension screw thread and promotes internal screw thread, middle part ontology outer circle is equipped with suspension step, and the suspension mount is in casing three
Logical top hangs the ontology outer circle below step and is equipped with jackscrew slot and seal groove；The lower body outer circle of small casing hanger
Less than upper body outer circle and it is equipped with tapering transition section, lower suspension screw thread is located in the lower body outer circle of small casing hanger,
It is connect with secondary well cementation with small casing.
3. secondary well cementation casing suspension device as claimed in claim 2, characterized in that in the small casing hanger body
The upper suspension screw thread and promotion internal screw thread in portion are threadedly coupled with well head big four lower flange and lifting sub respectively.
4. secondary well cementation casing suspension device as claimed in claim 1 or 2, characterized in that described sleeve pipe threeway standpipe
Upper end inner circle is equipped with inner chamfer, the upper portion pipe body of standpipe is equipped with top wire hole, the jackscrew slot on the top wire hole and small casing hanger
It is correspondingly arranged, in the jackscrew slot on jackscrew insertion small casing hanger being fitted into top wire hole；Former casing connection screw thread is located at
It is threadedly coupled above the lower part outer circle of casing threeway standpipe, with former casing.
5. secondary well cementation casing suspension device as claimed in claim 4, characterized in that described sleeve pipe threeway riser upper pipe
Jackscrew in body is at least packed into three.
6. secondary well cementation casing suspension device as claimed in claim 5, characterized in that passed through in described sleeve pipe threeway with standpipe
Logical transverse tube outer end is connected by the hoop of threeway hoop and clip and gate valve.
7. secondary well cementation casing suspension device as claimed in claim 6, characterized in that the hoop of the gate valve other side
It is connected by pipe line connection coupling and the hoop of recovery line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821553455.6U CN208845137U (en) | 2018-09-22 | 2018-09-22 | Casing suspension device is used in secondary well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821553455.6U CN208845137U (en) | 2018-09-22 | 2018-09-22 | Casing suspension device is used in secondary well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845137U true CN208845137U (en) | 2019-05-10 |
Family
ID=66373607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821553455.6U Active CN208845137U (en) | 2018-09-22 | 2018-09-22 | Casing suspension device is used in secondary well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208845137U (en) |
-
2018
- 2018-09-22 CN CN201821553455.6U patent/CN208845137U/en active Active
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