CN203022646U - Tie-back plug - Google Patents
Tie-back plug Download PDFInfo
- Publication number
- CN203022646U CN203022646U CN 201220705165 CN201220705165U CN203022646U CN 203022646 U CN203022646 U CN 203022646U CN 201220705165 CN201220705165 CN 201220705165 CN 201220705165 U CN201220705165 U CN 201220705165U CN 203022646 U CN203022646 U CN 203022646U
- Authority
- CN
- China
- Prior art keywords
- plug
- connecting cylinder
- tieback
- joint
- sealing ring
- 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 - Lifetime
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Abstract
The utility model discloses a tie-back plug which comprises an upper connector and a plug body. The upper connector is connected with the plug body through a plurality of connection barrels, each connection barrel and the plug body are respectively provided with a sealing assembly, and each sealing assembly is composed of a plurality of sealing rings and separating rings, wherein the separating rings are placed among the sealing rings and used for separating the sealing rings. The tie-back plug has the advantages of being hard to damage and high in reliability.
Description
Technical field
The utility model relates to Oil/gas Well production equipment technical field, specifically a kind of tieback plug.
Background technology
Along with the development of oil-gas field development technology, in order to improve oil, gas recovery ratio, a lot of horizontal well selection level well subsection acidizing pressure break barefoot completion modes.In implementing acid fracturing volume increase work progress, completing to the shaft bottom under the tubing string of bottom needs to utilize the tieback plug to return the slotting tubing string that produces oil after giving up to carry out pressure break and production, and joint ring is the vital seal member of tieback plug.Traditional seal member is directly process seal groove or process seal groove on the tieback plug on joint ring in the market, relies on installation O shape circle or v shaped ring to complete the sealing task.In construction, work under particular surroundings in the sealing position of tieback plug: 1, seal is worked under down-hole high temperature, high pressure; 2, the stroke of seal insertion tie-back sleeve is long; 3, often can carry out suitable adjustment to the tieback plug because of the construction demand, the tieback plug will repeatedly be extracted, is inserted, even rotated.Under such particular surroundings, traditional seal relies on seal groove and corresponding sealing ring to seal, and is easy to cause because wear and tear, push seal failure.If seal failure when the acid fracturing stimulation work, just must stop pressure break, the tubing string of down-hole tieback part and above several kms thereof is taken out carry out the sealing ring replacing, so not only can have a strong impact on efficiency of construction, improve operating cost but also increased the underground work risk.Therefore the reliability of traditional tieback plug seal member can not get ensureing, this just needs the higher seal of a kind of reliability.
In view of problem and the defective that above-mentioned existing tieback plug in use exists with joint ring, a kind of tieback plug of novelty is finally developed in the innovation that the inventor is actively studied, have not fragile, the characteristics that reliability is high.
The utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of tieback plug, have not fragile, the characteristics that reliability is high.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
The tieback plug, comprise top connection and plug, connect by a plurality of connecting cylinders between described top connection and plug, be respectively equipped with black box on described a plurality of connecting cylinders and described plug, described black box is by a plurality of joint rings and be located at the spacer ring that is used for the parting seal ring between joint ring and form.
Further, have respectively shoulder on described connecting cylinder and plug, described connecting cylinder be connected on plug black box by with described connecting cylinder be connected connecting cylinder or top connection and the shoulder axial location that plug is connected.
Further, described connecting cylinder is three, and described black box is comprised of three joint rings and two spacer rings being located between adjacent two seal rings.
Further, described joint ring comprises the joint ring body, has seal groove on described joint ring body, is provided with sealing ring in described seal groove, and described sealing ring and described joint ring body are connected to one.
Further, described sealing ring be sulfurized nitrile rubber by mold filling in seal groove.
Further, the two ends that are positioned at the seal groove outside of described sealing ring have respectively chamfering.
Further, the seal groove on described joint ring body is two.
Further, the inboard at the two ends of described joint ring body and the outside have respectively chamfering.
Further, the week of the inwall of described joint ring body upwards has annular groove, is provided with the sealing ring that seals between joint ring and described connecting cylinder and described plug in described annular groove.
Compared with prior art, the beneficial effects of the utility model are:
Tieback plug of the present utility model passes through to connect by connecting cylinder between top connection and plug, and the multistage black box is set, and reaches good sealing effectiveness, and not fragile, and reliability is high.In addition, the joint ring that the utility model adopts is closely as one sulfurized nitrile rubber and seal groove, and maximum advantage is, and the one, high temperature resistant, high pressure; The 2nd, the shortcoming such as overcome that sealing ring is long because of shift motion, wearing and tearing, the extrusion damage brought extracted in insertion repeatedly, come off.Effectively avoided because seal damages the difficulty of bringing to construction operation, therefore can effectively improve efficiency of construction, save operating cost, reduce construction risk.Improved the reliability of tieback plug.
Description of drawings
Fig. 1 is that the structure of tieback plug of the present utility model is partly cutd open figure;
Fig. 2 tieback plug of the present utility model cuts open figure with the sealing structure of rings;
Fig. 3 is I section enlarged drawing in Fig. 2.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
Fig. 1 is that the structure of tieback plug of the present utility model is partly cutd open figure.As shown in Figure 1, the tieback plug, the tieback plug comprises top connection 1 and plug 2, connects by a plurality of connecting cylinders 3 between top connection 1 and plug 2.In the present embodiment, the number of connecting cylinder 3 is three.Be respectively equipped with black box on three connecting cylinders 3 and plug 2, black box is by a plurality of joint rings 4 and be located at the spacer ring 5 that is used for parting seal ring 4 between joint ring 4 and form.In the present embodiment, every group of black box is made of the separated spacer ring 5 of joint ring three joint rings 4 and two.
Preferred as the present embodiment has respectively shoulder 6 on connecting cylinder 3 and plug 2, and the black box on connecting cylinder 3 and plug 2 is by connected connecting cylinder or top connection and shoulder axial location.
Fig. 2 is that tieback plug of the present utility model cuts open figure with the sealing structure of rings.As shown in Figure 2, joint ring 4 of the present utility model comprises joint ring body 41, is arranged with two seal grooves on joint ring body 41 in parallel.Be respectively equipped with sealing ring 42 in seal groove, sealing ring 42 is connected to one with joint ring body 41.Sealing ring 42 be sulfurized nitrile rubber by mold filling in seal groove.The inboard at the two ends of joint ring body 41 and the outside have respectively chamfering.Upwards have in the week of the inwall of joint ring body 41 for the annular groove 43 of settling sealing ring, to be used for the sealing between joint ring 4 and connecting cylinder 3 or plug 2.In addition, between top connection 1 and connecting cylinder 3, between connecting cylinder and connecting cylinder and be respectively equipped with sealing ring (generally adopting O-ring seals) between connecting cylinder 3 and plug 2, to improve tieback plug overall sealing performance.The female mouthful of place that female mouth place that female mouthful of place, the connecting cylinder that generally is connected with connecting cylinder 3 in top connection 1 is connected with connecting cylinder and connecting cylinder 3 are connected with plug 2 offers the groove of arrangement sealing ring, and sealing ring is placed in this groove.More be beneficial to and install and sealing.Fig. 3 is I section enlarged drawing in Fig. 2.As shown in Figure 3, the two ends that are positioned at the seal groove outside of sealing ring 42 have respectively chamfering.Chamfering can be that rounded corner can be also straight chamfering.Arrange chamfering can be when pegging graft easy operating, avoid sealing ring 42 to damage, strengthened simultaneously that sealing ring is stressed and the tolerance of tangential force.
The utility model uses mold filling in seal groove sulfurized nitrile rubber.Tightr for what acrylonitrile-butadiene rubber was combined with seal groove, before sulfuration, seal groove is carried out sandblast, pickling processes.Fill 12 joint rings of the present utility model (also can increase and decrease according to demand) on each tieback plug, also can keep and the combining closely of seal groove even repeatedly insert, extract rubber ring in the down-hole of HTHP.Therefore such tieback plug seal has just possessed the characteristics of high temperature high voltage resistant, not fragile, difficult drop-off, compares the efficient that can improve construction operation with traditional seal, reduces costs, reduces construction risk.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (9)
1. tieback plug, comprise top connection and plug, it is characterized in that, connect by a plurality of connecting cylinders between described top connection and plug, be respectively equipped with black box on described a plurality of connecting cylinder and described plug, described black box is by a plurality of joint rings and be located between joint ring the spacer ring that is used for the parting seal ring and form.
2. tieback plug according to claim 1, it is characterized in that, have respectively shoulder on described connecting cylinder and plug, described connecting cylinder be connected on plug black box by with described connecting cylinder be connected connecting cylinder or top connection and the shoulder axial location that plug is connected.
3. tieback plug according to claim 1, is characterized in that, described connecting cylinder is three, and described black box is comprised of three joint rings and two spacer rings being located between adjacent two seal rings.
4. tieback plug according to claim 1, is characterized in that, described joint ring comprises the joint ring body, has seal groove on described joint ring body, is provided with sealing ring in described seal groove, and described sealing ring and described joint ring body are connected to one.
5. tieback plug according to claim 4, is characterized in that, described sealing ring be sulfurized nitrile rubber by mold filling in seal groove.
6. tieback plug according to claim 4, is characterized in that, the two ends that are positioned at the seal groove outside of described sealing ring have respectively chamfering.
7. tieback plug according to claim 4, is characterized in that, the seal groove on described joint ring body is two.
8. tieback plug according to claim 4, is characterized in that, the inboard at the two ends of described joint ring body and the outside have respectively chamfering.
9. tieback plug according to claim 4, is characterized in that, the week of the inwall of described joint ring body upwards has annular groove, is provided with the sealing ring that seals between sealing ring and described connecting cylinder and described plug in described annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220705165 CN203022646U (en) | 2012-12-18 | 2012-12-18 | Tie-back plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220705165 CN203022646U (en) | 2012-12-18 | 2012-12-18 | Tie-back plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203022646U true CN203022646U (en) | 2013-06-26 |
Family
ID=48646637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220705165 Expired - Lifetime CN203022646U (en) | 2012-12-18 | 2012-12-18 | Tie-back plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203022646U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015912A (en) * | 2012-12-18 | 2013-04-03 | 安东石油技术（集团）有限公司 | Tieback plug |
-
2012
- 2012-12-18 CN CN 201220705165 patent/CN203022646U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015912A (en) * | 2012-12-18 | 2013-04-03 | 安东石油技术（集团）有限公司 | Tieback plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |