CN115324517B - High-pressure metal sealing hanger for continuous oil pipe - Google Patents
High-pressure metal sealing hanger for continuous oil pipe Download PDFInfo
- Publication number
- CN115324517B CN115324517B CN202210865248.9A CN202210865248A CN115324517B CN 115324517 B CN115324517 B CN 115324517B CN 202210865248 A CN202210865248 A CN 202210865248A CN 115324517 B CN115324517 B CN 115324517B
- Authority
- CN
- China
- Prior art keywords
- hanger
- sealing
- seal
- jackscrew
- coiled tubing
- 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.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 99
- 239000002184 metal Substances 0.000 title claims abstract description 59
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000012856 packing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Abstract
The utility model relates to a high-pressure metal seal hanger for continuous oil pipe, including the hanger main part, be equipped with the cavity in the hanger main part, be provided with the dabber subassembly in the cavity, there is coiled tubing in the dabber subassembly, the dabber subassembly is including pressing cover and seal cover, it is in to press the cover to set up the upper portion of seal cover and follow outside pressfitting is in on the seal cover, the below of seal cover is equipped with metal seal spare, form sealedly between metal seal spare's both ends respectively and the coiled tubing, metal seal spare top arc section and bottom arc section respectively with seal cover's conical surface with form sealedly between the conical surface of hanger main part. The sealing device has good sealing effect, can be tested, and is low in manufacturing cost and convenient to install.
Description
Technical Field
The application relates to a high-pressure metal sealing hanger for a continuous oil pipe, which is applicable to the technical field of oil extraction equipment.
Background
The hanger is a common device in oil extraction equipment, and besides coiled tubing can be hung for oil extraction, other types of tubing can be hung according to actual needs, for example, heating tubing can be hung for heating wax deposition underground so as to break down the wax deposition and the like.
Chinese patent application 201911010006.6 discloses a metal seal high-pressure pipe cable hanger, comprising a hanger body, wherein a hollow cavity is provided in the hanger body, a suspension mandrel assembly for suspending the pipe cable is installed in the hollow cavity, and a metal seal ring for sealing the pipe cable is installed at the lower end of the hollow cavity; a plurality of jackscrew assemblies are installed in the middle of the hanger body along the circumferential direction, the jackscrew assemblies penetrate through the hanger body and are clamped with the hanging mandrel assemblies, the jackscrew assemblies are screwed, the hanging mandrel assemblies are pushed to descend, the bottom ends of the hanging mandrel assemblies are tightly matched with the metal sealing rings and conical surfaces of the hanger body, under the action of the mandrel extrusion force, the conical surfaces of the upper ends of the metal sealing rings are elastically deformed and contracted inwards, the inner hole openings of the metal sealing rings are tightly pressed on the outer wall of the heating pipe cable to be in sealing fit, and high-pressure oil can be effectively sealed below the hanger. The hanger in this patent has the following technical problems: the inner seal between the mandrel and the metal seal ring has only a sealing part a which is in surface contact, has low contact pressure and poor sealing capability, and is not applicable to high downhole pressure of more than 140 MPa; moreover, as the metal sealing ring is tightly attached to the pipe cable, the tightness between the metal sealing ring and the pipe cable cannot be tested, so that early warning information cannot be sent out when the sealing is invalid; in addition, the slips adopted are cylindrical slips with clamping parts on the outer side surfaces, and are inconvenient to install and manufacture.
In the prior art, a high-pressure metal sealing hanger for a continuous oil pipe, which has better sealing effect and is convenient for testing the sealing reliability during installation, is needed.
Disclosure of Invention
The utility model provides a purpose designs a coiled tubing is with high-pressure metal seal hanger, and it not only has good sealed effect and the test tightness of being convenient for, but also has low in manufacturing cost, simple to operate's technical advantage.
The utility model relates to a high-pressure metal seal hanger for continuous oil pipe, including the hanger main part, be equipped with the cavity in the hanger main part, be provided with the dabber subassembly in the cavity, be equipped with coiled tubing in the dabber subassembly, the dabber subassembly is including pressing cover and seal cover, it is in to press the cover to set up the upper portion of seal cover and follow outside pressfitting is in on the seal cover, the below of seal cover is equipped with C type metal seal spare, form sealedly between C type metal seal spare's both ends respectively and the coiled tubing, C type metal seal spare's top arc section and bottom arc section respectively with the conical surface of seal cover with form sealedly between the conical surface of hanger main part.
The C-shaped metal sealing piece can be provided with a through hole, and the through hole is communicated with a first cavity surrounded by the C-shaped metal sealing piece, the sealing sleeve and the hanger main body and a second cavity surrounded by the C-shaped metal sealing piece and the continuous oil pipe; the cavity enclosed by the pressing sleeve, the sealing sleeve and the continuous oil pipe is internally provided with a slip and a slip seat, and the slip can be in a shuttle shape with wide middle and narrow two ends; the upper end and the lower end of the slip can be respectively provided with a slip seat, and a bearing can be arranged between the slip seat at the upper end and the pressing sleeve.
The side surface of the hanger main body can be provided with a jacking hole, and a jackscrew assembly is arranged in the jacking hole; the jackscrew assembly may include a jackscrew and a jackscrew press cap disposed between the jackscrew and the hanger body; the packing pressing piece, the sealing packing and the jackscrew sealing piece can be sequentially arranged among the jackscrew pressing cap, the jackscrew and the hanger main body from outside to inside; an inner sealing ring can be arranged between the sealing sleeve and the continuous oil pipe below the jackscrew assembly, and an outer sealing ring can be arranged between the sealing sleeve and the hanger main body; the inner end of the jackscrew assembly can be provided with a conical head, the side wall of the sealing sleeve can be provided with a conical opening matched with the conical head, and the sealing sleeve and the continuous oil pipe can be tightly jacked by the jackscrew assembly.
The high-pressure metal sealing hanger for the continuous oil pipe has the following technical advantages:
(1) According to the double-seal sealing device, the C-shaped metal sealing piece is arranged below the sealing sleeve, the two ends of the C-shaped metal sealing piece are respectively in contact sealing with the toothed surface of the continuous oil pipe, the top arc section and the bottom arc section of the C-shaped metal sealing piece are respectively in line contact sealing with the conical surfaces of the sealing sleeve and the hanger main body, so that the double-metal sealing is formed, the sealing contact area is small, the sealing performance is strong, and the double-seal sealing device can be suitable for underground high pressure of more than 140 Mpa;
(2) According to the method, the through holes are formed in the C-shaped metal sealing piece, so that the tightness of the first cavity and the tightness of the second cavity at the bottom end of the hanger can be tested, and early warning information can be timely sent out even if sealing failure occurs between the C-shaped metal sealing piece and the continuous oil pipe;
(3) The slips between the hanger main body and the continuous oil pipe are in a shuttle shape with wide middle and narrow two ends, so that the manufacturing cost is reduced, the installation is convenient, the production efficiency can be greatly improved, and the operation cost is reduced; meanwhile, the shuttle-shaped slips are adopted, so that the oil pipe can be prevented from moving upwards and downwards, and the bidirectional anti-moving effect is achieved.
Drawings
Fig. 1 is a cross-sectional view of a high pressure metal seal hanger for coiled tubing of the present application.
FIG. 2 is a schematic illustration of slips inside a high pressure metal seal hanger for coiled tubing.
FIG. 3 is a schematic view of a C-type metal seal inside a high pressure metal seal hanger for a coiled tubing.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
According to the high-pressure metal sealing hanger for the continuous oil pipe, the high-pressure metal sealing hanger comprises a hanger main body 1, a cavity is formed in the hanger main body 1, a mandrel assembly is arranged in the cavity, a continuous oil pipe 22 is arranged in the center of the mandrel assembly, and the mandrel assembly can be connected with an external connector 18 through a hole formed in the hanger main body 1. As shown in fig. 1, the mandrel assembly comprises a pressing sleeve 15 and a sealing sleeve 11 which are mutually pressed, the pressing sleeve 15 is arranged on the upper part of the sealing sleeve 11 and is pressed on the sealing sleeve 11 from the outside, and a top sealing ring 17 is arranged between the top end of the pressing sleeve 15 and a continuous oil pipe 22. The cavity enclosed by the pressing sleeve 15, the sealing sleeve 11 and the continuous oil pipe 22 is internally provided with a slip 13 and a slip seat 12, wherein the slip 13 is in a fusiform shape with a wide middle and narrow two ends. The upper and lower ends of the slips 13 are respectively provided with a slip seat 12, and a bearing 16 is arranged between the slip seat at the upper end and the pressing sleeve 15. The face of the slip bowl 12 that contacts the slips 13 is angled to match the shape of the slips' shuttle. The contact surface of the slips 13 and the coiled tubing 22 may be provided with indentations, or non-indentations slips may be used. The application adopts the fusiform slips, so that not only is the manufacturing cost reduced, but also the installation is convenient, the production efficiency can be greatly improved, and the operation cost is reduced. Meanwhile, the shuttle-shaped slips are adopted, so that the oil pipe can be prevented from moving upwards and downwards, and the bidirectional anti-moving effect is achieved.
The side of the hanger main body 1 is provided with a jacking hole, a jackscrew assembly is arranged in the jacking hole, and the jackscrew assembly is transversely inserted into the jacking hole. The inner end of the jackscrew assembly is provided with a conical head, and the side wall of the sealing sleeve 11 is provided with a conical opening matched with the conical head. The seal sleeve 11 is tightly propped against the coiled tubing through the jackscrew assembly so as to seal and clamp the coiled tubing in the seal sleeve. The jackscrew assembly comprises a jackscrew 8 and a jackscrew press cap 20, wherein the jackscrew press cap 20 is arranged in a jacking hole between the jackscrew 8 and the hanger main body 1. In order to enhance the jacking and sealing effects, a packing pressing sheet 6, a sealing packing 7 and a jackscrew sealing piece 5 can be arranged between the jackscrew pressing cap 20, the jackscrew 8 and the hanger main body 1 in sequence from outside to inside. An inner sealing ring 3 can be arranged between the sealing sleeve 11 and the continuous oil pipe 22 at the lower position of the jackscrew assembly, and an outer sealing ring 4 can be arranged between the sealing sleeve 11 and the hanger main body 1 so as to realize the sealing effect of the sealing sleeve.
A C-shaped metal sealing member 2 is further arranged below the sealing sleeve 11, and as shown in fig. 3, sealing points a and d are formed between two ends of the C-shaped metal sealing member 2 and the coiled tubing 22 respectively. In addition, the top and bottom arc segments of the C-metal seal 2 form sealing points b and C with the tapered surfaces of the gland 11 and the hanger body 1, respectively. The sealing points a and d can be in toothed surface contact, the sealing points b and c are in line contact, and bimetal sealing is formed, so that the sealing contact area is small, the sealing performance is strong, and the sealing device can be suitable for underground high pressure of more than 140 Mpa. The C-shaped metal seal 2 divides the cavity into two parts, namely a first cavity surrounded by the C-shaped metal seal 2, the sealing sleeve 11 and the hanger main body 1 and a second cavity surrounded by the C-shaped metal seal 2 and the coiled tubing 22. Through holes 21 are formed between the first cavity and the second cavity, so that the tightness in the first cavity and the tightness in the second cavity can be tested, and in particular, the sealing effect between the metal sealing piece and the continuous oil pipe can be tested. That is, the double sealing of the bottom end of the hanger can be realized, and the tightness of the sealing part can be conveniently tested, so that plugging measures can be timely taken when leakage accidents occur.
Although the embodiments disclosed in the present application are described above, the descriptions are merely for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art to which this application pertains will be able to make any modifications and variations in form and detail of implementation without departing from the spirit and scope of the disclosure, but the scope of the patent claims of this application shall be subject to the scope of the claims that follow.
Claims (7)
1. The utility model provides a high-pressure metal seal hanger for coiled tubing, includes the hanger main part, be equipped with the cavity in the hanger main part, be provided with the dabber subassembly in the cavity, there is coiled tubing in the dabber subassembly, the dabber subassembly includes jacket and seal cover, the jacket sets up the upper portion of seal cover and pressfitting from outside is in on the seal cover, its characterized in that, the below of seal cover is equipped with C type metal seal, form sealedly between C type metal seal's both ends and the coiled tubing respectively, form sealedly between C type metal seal's top arc section and the bottom arc section respectively with the conical surface of seal cover and the conical surface of hanger main part; the C-shaped metal sealing piece is provided with a through hole, and the through hole is communicated with a first cavity surrounded by the C-shaped metal sealing piece, the sealing sleeve and the hanger main body and a second cavity surrounded by the C-shaped metal sealing piece and the continuous oil pipe; the cavity enclosed by the pressing sleeve, the sealing sleeve and the continuous oil pipe is internally provided with a slip and a slip seat, and the slip is in a fusiform shape with wide middle and narrow two ends;
the two ends of the C-shaped metal sealing piece are respectively connected with the coiled tubing to form a first sealing point and a fourth sealing point, a top arc section and a bottom arc section of the C-shaped metal sealing piece are respectively connected with a conical surface of the sealing sleeve and a conical surface of the hanger main body to form a second sealing point and a third sealing point, the first sealing point and the fourth sealing point are in toothed surface contact, and the second sealing point and the third sealing point are in line contact to form a bimetal seal.
2. The high-pressure metal seal hanger for continuous oil pipes according to claim 1, wherein slip seats are respectively provided at upper and lower ends of the slips, and a bearing is provided between the slip seat at the upper end and the press sleeve.
3. A high pressure metal seal hanger for a coiled tubing according to claim 1 or 2, wherein the side of the hanger body is provided with a jacking hole in which a jackscrew assembly is provided.
4. A high pressure metal seal hanger for a coiled tubing according to claim 3, wherein said jackscrew assembly comprises a jackscrew and a jackscrew press cap, said jackscrew press cap being disposed between said jackscrew and said hanger body.
5. The high pressure metal seal hanger for coiled tubing of claim 4, wherein a packing sheeting, a sealing packing and a jackscrew seal are sequentially disposed between said jackscrew press cap, said jackscrew and said hanger body from the outside to the inside.
6. The high pressure metal seal hanger for coiled tubing of claim 5, wherein an inner seal ring is disposed between said seal sleeve and said coiled tubing below said jackscrew assembly, and an outer seal ring is disposed between said seal sleeve and said hanger body.
7. A high pressure metal seal hanger for a coiled tubing according to claim 3, wherein the inner end of the jackscrew assembly is provided with a conical head, the side wall of the sealing sleeve is provided with a conical opening matched with the conical head, and the sealing sleeve is tightly propped against the coiled tubing through the jackscrew assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865248.9A CN115324517B (en) | 2022-07-21 | 2022-07-21 | High-pressure metal sealing hanger for continuous oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865248.9A CN115324517B (en) | 2022-07-21 | 2022-07-21 | High-pressure metal sealing hanger for continuous oil pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115324517A CN115324517A (en) | 2022-11-11 |
| CN115324517B true CN115324517B (en) | 2024-03-08 |
Family
ID=83919485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210865248.9A Active CN115324517B (en) | 2022-07-21 | 2022-07-21 | High-pressure metal sealing hanger for continuous oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115324517B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2135739C1 (en) * | 1998-01-05 | 1999-08-27 | Пшеничный Павел Леонтьевич | Anchor packer |
| CA2497090A1 (en) * | 2005-02-15 | 2006-08-15 | Donald Sieben | Coil tubing hanger and method of using same |
| CN109025893A (en) * | 2018-09-18 | 2018-12-18 | 中国石油集团西部钻探工程有限公司 | detachable packer |
| CN208981995U (en) * | 2018-09-27 | 2019-06-14 | 中国船级社 | Installation tool for marine drilling casing head and sealing device |
| CN216517902U (en) * | 2021-11-04 | 2022-05-13 | 江苏金石机械集团有限公司 | Single-cylinder three-well double-cable wellhead device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017051335A1 (en) * | 2015-09-22 | 2017-03-30 | Cardona Aguirre Yadira | Device and method for the safety sealing and repair of electrical conductors that pass through wellheads |
-
2022
- 2022-07-21 CN CN202210865248.9A patent/CN115324517B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2135739C1 (en) * | 1998-01-05 | 1999-08-27 | Пшеничный Павел Леонтьевич | Anchor packer |
| CA2497090A1 (en) * | 2005-02-15 | 2006-08-15 | Donald Sieben | Coil tubing hanger and method of using same |
| CN109025893A (en) * | 2018-09-18 | 2018-12-18 | 中国石油集团西部钻探工程有限公司 | detachable packer |
| CN208981995U (en) * | 2018-09-27 | 2019-06-14 | 中国船级社 | Installation tool for marine drilling casing head and sealing device |
| CN216517902U (en) * | 2021-11-04 | 2022-05-13 | 江苏金石机械集团有限公司 | Single-cylinder three-well double-cable wellhead device |
Non-Patent Citations (1)
| Title |
|---|
| 新型芯轴悬挂器研制与应用;张川;宋振华;毕群泗;郑泳;刘鸣;赵琳;刘义;;钻采工艺;20161125(06);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115324517A (en) | 2022-11-11 |
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