CN203835328U - Releasing tool back-inserting device for liner tube secondary well cementation - Google Patents
Releasing tool back-inserting device for liner tube secondary well cementation Download PDFInfo
- Publication number
- CN203835328U CN203835328U CN201420206662.XU CN201420206662U CN203835328U CN 203835328 U CN203835328 U CN 203835328U CN 201420206662 U CN201420206662 U CN 201420206662U CN 203835328 U CN203835328 U CN 203835328U
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- CN
- China
- Prior art keywords
- pipe
- releasing tool
- inserting device
- well cementation
- bushing pipe
- 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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Abstract
The utility model discloses a releasing tool back-inserting device for liner tube secondary well cementation. The upper end of the releasing tool back-inserting device is connected with a delivery tubular column through an oil pipe female buckle, and the lower end of the releasing tool back-inserting device is connected with a liner tube through an oil pipe male buckle. The releasing tool back-inserting device is mainly composed of a back-inserting pipe, a reversed fastening connector and an outer pipe. The back-inserting pipe is arranged in an inner cavity formed by the reversed fastening connector and the outer pipe and is connected with the reversed fastening connector through a reverse buckle. The reversed fastening connector is connected with an outer pipe screw thread through an oil pipe female buckle. A centering guide is arranged at the upper end of the back-inserting pipe in a sleeved mode. An O-shaped sealing ring is arranged between the outer wall of the lower end of the back-inserting pipe and the inner wall of the outer pipe. The centering guide is of a concentric structure with six petals. The releasing tool back-inserting device has the advantages of being reasonable in structure design, low in cost, simple in manufacturing technology and convenient to mount and connect, and the releasing tool back-inserting device can greatly lower cost, and is large in inner drift diameter and safe and reliable.
Description
Technical field
The utility model relates to a kind of bushing pipe secondary well cementation plug device of giving up back, is that a kind of simple and easy bushing pipe of applying in oil-water well bushing pipe secondary well shaft fixing technology is delivered and given up, returns to insert and seal circulation cementing unit.
Background technology
Oil field, Eastern China generally enters middle and advanced stage exploitation, and particularly some old well covers damage seriously, and is much that multistage, multiple spot cover damage, and has caused very large difficulty to the exploitation in oil field.Bushing pipe secondary well shaft fixing technology is a kind of effective ways, particularly multistage casing damaged well of administering casing damaged well, combines and carries out the comprehensive regulation often with the shutoff of oil-water-layer.At present mostly bushing pipe secondary well cementation all adopts casing hanger to carry out bushing pipe delivery and well cementation, and this installs not only complex structure, and cost is also high, general all ten thousand yuan of 5-7, and interior latus rectum is less, later stage working string be difficult to by.
Utility model content
The purpose of this utility model is to develop replacement liquid gland pipe hanger, meets the requirement of bushing pipe secondary well shaft fixing technology, realizes bushing pipe delivery and gives up, returns and insert sealing for starching cementing technology technique.Carry
For a kind of " bushing pipe secondary well cementation give up back plug device ", this time plug device has advantages of reasonable in design, cost is low, manufacturing process is simple, it is easy to connect to install, be a kind ofly significantly reduce costs, plug device is given up back in bushing pipe secondary well cementation that interior latus rectum is large, safe and reliable.
To achieve these goals, the utility model is achieved through the following technical solutions: main technical scheme is, the bushing pipe secondary well cementation plug device of giving up back, the upper end of this device is connected with delivery tubing string by oil pipe box, and lower end is connected with bushing pipe by oil pipe pin thread.This device mainly forms by returning intubate, back-off joint and outer tube.Described time intubate is arranged in the inner chamber that back-off joint and outer tube form, and by reverse button, is connected with back-off joint, is horn mouth shape, and described back-off joint is by oil pipe box and outer tube screwed connection.
Further technical scheme is, on described time intubate top, is provided with the oil pipe box for being connected with delivery tubing string, described time intubate upper end, is arranged with centralizer.
Further technical scheme is, between described time intubate lower end outer wall and outer tube wall, is provided with O RunddichtringO.
Further technical scheme is, described centralizer is 6 lobe concentric structures.
The utility model compared with prior art tool has the following advantages:
1, the utlity model has reasonable in design, cost is low, manufacturing process is simple, advantage easy to connect is installed, be a kind ofly significantly reduce costs, plug device is given up back in bushing pipe secondary well cementation that interior latus rectum is large, safe and reliable.
2, cost is low, and hanger price general charged is ten thousand yuan of 5-7, and this installation cost is no more than 5000 yuan;
3, because returning intubate, be arranged in the inner chamber that back-off joint and outer tube form, by reverse button, be connected with back-off joint, be horn mouth shape, realize the bushing pipe secondary slotting technical purpose of giving up back of cementing the well.
4,, because be provided with O RunddichtringO between described time intubate lower end outer wall and outer tube wall, effectively realize for slurry Sealing Technology object.
5, because this device stays well part identical with bottom bushing pipe latus rectum, to guarantee latus rectum in pit shaft, in conventional internal diameter 124mm sleeve pipe, use, interior latus rectum maximum can reach 105mm, for later stage operation is provided convenience.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model.
In figure: 1, return intubate, 2, centralizer, 3, reverse button, 4, oil pipe box, 5, back-off joint, 6, outer tube, 7, O RunddichtringO, 8, oil pipe pin thread.
The specific embodiment
Below by non-limiting example, further set forth the utility model, understand the utility model.
Embodiment
The utility model as shown in Figure 1, a kind of bushing pipe secondary well cementation plug device of giving up back, the upper end of this device is connected with delivery tubing string by oil pipe box, lower end is connected with bushing pipe by oil pipe pin thread.This device mainly forms by returning intubate, back-off joint and outer tube.Described time intubate is arranged in the inner chamber that back-off joint and outer tube form, and by reverse button, is connected with back-off joint, is horn mouth shape, and described back-off joint is by oil pipe box and outer tube screwed connection.
On described time intubate top, be provided with the oil pipe box for being connected with delivery tubing string, described time intubate upper end, be arranged with centralizer.
Between described time intubate lower end outer wall and outer tube wall, be provided with O RunddichtringO.
Described centralizer is 6 lobe concentric structures.
The function of giving up realizes by back-off joint, the high 1.5mm of back-off joint tooth, pitch 4mm; For slurry sealing function, by returning intubate, coordinate realization with outer tube, design three road O RunddichtringOs.Specifeca tion speeification: maximum outside diameter: 118mm, interior latus rectum: 82mm; Return slotting sealing load 15MPa.This device can be realized bushing pipe delivery, the well cementation one-trip string of giving up completes, and meets the requirement of 1500 meters of bushing pipe secondary well shaft fixing technologies.
This device can design processing according to connected bushing pipe specification.
The course of work:
1, device assembling: return intubate upper end oil pipe box: Φ 73mm; 6 lobe centralizers; centralizer can adopt the method for welding wiper block to be connected with time intubate; also can adopt being processed as one of round steel structure; oppositely detain: Ф 90mm; by reverse button, be connected with back-off joint, the bottom in back-off joint is oil pipe box; Ф 89mm, the pin thread of the hanger outer tube by box and bottom carries out screwed connection, goes back to intubate lower end and is provided with O RunddichtringO groove, by filling sealed circle and outer tube wall, realizes sealing effectiveness, outer tube bottom oil pipe pin thread: Ф 89mm, for carrying out screwed connection with bottom bushing pipe.
2,, after this device is assembled, in ground pressure testing, to 15MPa, confirm sealing.By technological design, be lowered to bushing pipe (weight indicator is weighed), bushing pipe top connects this device, this device top connects delivers tubing string, and after shaft bottom red dog or sand face, main story tubing string is realized bushing pipe by back-off joint and given up, bushing pipe is seated on shaft bottom red dog or sand face, tubing string 20-30cm is carried in examination, observes weight indicator, confirms to give up after (referring to heavily decline), slowly transfer to tubing string and be hampered, realize back and inserting.
3, by technological design, configure cementing slurry, direct circulation is replaced into cement paste, replacement clear water, and after mortar replaces and puts in place, 2 meters of anti-flushing wells of upper lifting pipe post, wash out superfluous water mud, propose to deliver tubing string, fill pit shaft time and coagulate, and complete bushing pipe secondary well shaft fixing technology.
In sum, the utlity model has reasonable in design, cost is low, manufacturing process is simple, advantage easy to connect is installed, be a kind ofly significantly reduce costs, plug device is given up back in bushing pipe secondary well cementation that interior latus rectum is large, safe and reliable.
Claims (4)
1. the bushing pipe secondary well cementation plug device of giving up back, the upper end of this device is connected with delivery tubing string by oil pipe box, lower end is connected with bushing pipe by oil pipe pin thread (8), it is characterized in that, this device mainly forms by returning intubate (1), back-off joint (5) and outer tube (6), described time intubate (1) is arranged in the inner chamber that back-off joint (5) and outer tube (6) form, by reverse button (3), be connected with back-off joint (5), be horn mouth shape, described back-off joint (5) is by oil pipe box (4) and outer tube (6) screwed connection.
2. a kind of bushing pipe secondary well cementation according to claim 1 plug device of giving up back, is characterized in that: on described time intubate (1) top, be provided with the oil pipe box for being connected with delivery tubing string, in described time intubate (1) upper end, be arranged with centralizer (2).
3. a kind of bushing pipe secondary well cementation according to claim 1 and 2 plug device of giving up back, is characterized in that, between described time intubate (1) lower end outer wall and outer tube (6) inwall, is provided with O RunddichtringO.
4. a kind of bushing pipe secondary well cementation according to claim 3 plug device of giving up back, is characterized in that, described centralizer (2) is 6 lobe concentric structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420206662.XU CN203835328U (en) | 2014-04-25 | 2014-04-25 | Releasing tool back-inserting device for liner tube secondary well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420206662.XU CN203835328U (en) | 2014-04-25 | 2014-04-25 | Releasing tool back-inserting device for liner tube secondary well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835328U true CN203835328U (en) | 2014-09-17 |
Family
ID=51513185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420206662.XU Expired - Fee Related CN203835328U (en) | 2014-04-25 | 2014-04-25 | Releasing tool back-inserting device for liner tube secondary well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835328U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879089A (en) * | 2015-06-03 | 2015-09-02 | 中国石油化工股份有限公司华东分公司采油厂 | Secondary well cementing technique and secondary well cementing device by liner pipe |
| CN104912512A (en) * | 2015-06-29 | 2015-09-16 | 中国海洋石油总公司 | Packing device for inserting pipe |
-
2014
- 2014-04-25 CN CN201420206662.XU patent/CN203835328U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879089A (en) * | 2015-06-03 | 2015-09-02 | 中国石油化工股份有限公司华东分公司采油厂 | Secondary well cementing technique and secondary well cementing device by liner pipe |
| CN104912512A (en) * | 2015-06-29 | 2015-09-16 | 中国海洋石油总公司 | Packing device for inserting pipe |
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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 |
Granted publication date: 20140917 Termination date: 20160425 |