CN211648105U - Metal sealing type tail pipe hanger - Google Patents
Metal sealing type tail pipe hanger Download PDFInfo
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- CN211648105U CN211648105U CN202020147350.1U CN202020147350U CN211648105U CN 211648105 U CN211648105 U CN 211648105U CN 202020147350 U CN202020147350 U CN 202020147350U CN 211648105 U CN211648105 U CN 211648105U
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Abstract
A metal sealed type tail pipe hanger relates to the technical field of oil field drilling, and comprises a hydraulic expansion cone and an expansion pipe, wherein the hydraulic expansion cone is provided with a central pipe A, an upper mounting disc, upper petals, a lower mounting disc, lower petals, a piston and a piston sleeve, and further comprises a sealing assembly and a slip packer; a central pipe B is arranged in the slip packer, the upper end of the central pipe B is connected with the lower end of the central pipe A through a bolt, the connection part is sealed through a sealing ring, and the lower end of the central pipe B is connected with a plug; a soft rope is connected between the lower end of the hydraulic expansion cone and the upper end of the slip packer, an accommodating cavity for accommodating the soft rope is arranged between the lower part of the piston sleeve and the central pipe A, and the soft rope is provided with redundancy of 10m-20m in the accommodating cavity. The operation process has stronger operability and simpler construction process.
Description
Technical Field
The invention belongs to the technical field of oilfield drilling, and particularly relates to a metal sealing type liner hanger.
Background
The tail pipe suspension well completion technology can provide larger borehole size for later steam injection and oil extraction operation, can also reduce casing pipe overlapping, saves cement consumption, reduces drilling cost, can only save casing pipe cost to hundreds of thousands of even millions of dollars for one single well, and has very obvious economic benefit. The expansion tail pipe hanging tool is one of the cores of tail pipe hanging well completion technology, from the existing expansion tail pipe hanging tool, various expansion tail pipe hanging systems have been developed successively by main petroleum technical service companies at home and abroad, the power system comprises a hydraulic type and a mechanical type, the sealing mode comprises rubber sealing, metal sealing and rubber-metal combined sealing, the releasing mode comprises mechanical type, hydraulic type and mechanical-hydraulic double-acting type, the expansion tool comprises a solid expansion cone and a variable-diameter expansion cone, and the systems have respective characteristics and form a more perfect system. In view of the situation of field application at present, the variable-diameter expansion cone driven by hydraulic pressure is applied in many practical applications, but the existing device expands the tail pipe by lifting the drill rod, so that the operability is poor, and the construction effect needs to be improved.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a metal sealing type tail pipe hanger.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides a metal sealed type liner hanger which comprises a hydraulic expansion cone and an expansion pipe, wherein the hydraulic expansion cone is provided with a central pipe A, an upper mounting disc, upper petals, a lower mounting disc, lower petals, a piston and a piston sleeve, the upper mounting disc, the upper petals, the lower mounting disc, the lower petals, the piston and the piston sleeve are all sleeved on the central pipe A, the piston sleeve is fixedly connected on the central pipe A, the piston is mounted in the piston sleeve, a liquid passing hole is correspondingly formed in the central pipe A and in correspondence with the lower end face of the piston, the upper mounting disc is fixedly connected with the central pipe A, the lower mounting disc is slidably mounted on the central pipe A and can slide upwards under the pushing of the piston, the upper end of each upper petal is mounted on the upper mounting disc through a sliding block mechanism, the lower end of each lower petal is mounted on the lower mounting disc through a sliding block mechanism, so that the upper petals and the lower petals can slide along the radial direction of the upper mounting disc, the upper petals and the lower petals are respectively provided with three, the lower ends of the three upper petals are staggered with the upper ends of the three lower petals, the expansion pipe is sleeved outside the hydraulic expansion cone,
the device also comprises a sealing assembly and a slip packer;
the sealing assembly structurally comprises a rubber sealing element, an upper supporting sleeve and a lower supporting sleeve, wherein the upper supporting sleeve and the lower supporting sleeve are sleeved on the outer side of the central tube A, the lower end of the upper supporting sleeve and the upper end of the lower supporting sleeve are respectively provided with a group of finger-shaped structures, and the two groups of finger-shaped structures are arranged in a crossed mode;
a central pipe B is arranged in the slip packer, the upper end of the central pipe B is connected with the lower end of the central pipe A through a bolt, the connection part is sealed through a sealing ring, and the lower end of the central pipe B is connected with a plug;
a soft rope is connected between the lower end of the hydraulic expansion cone and the upper end of the slip packer, an accommodating cavity for accommodating the soft rope is arranged between the lower part of the piston sleeve and the central pipe A, and the soft rope is provided with redundancy of 10m-20m in the accommodating cavity;
and a metal sealing ring is embedded on the outer side of the expansion pipe.
As a further technical scheme, a leather bowl part is arranged at the lower edge of the rubber sealing part, and an opening of the leather bowl part faces downwards.
As a further technical solution, the flexible rope is made of steel wire.
As a further technical solution, the flexible rope is made of carbon fiber.
As a further technical scheme, an annular groove is formed in the outer side of the rubber sealing piece, and a supporting ring surrounded by a serpentine spring is arranged in the annular groove.
As a further technical scheme, the serpentine spring is formed by bending a spring steel plate.
The invention has the beneficial effects that: when the small-drill-rod expansion packer is used, a channel in the center of a small drill rod is used for pressing the center pipe A and the center pipe B, the piston slides upwards and pushes the lower mounting disc by the pressure in the center pipe A, the lower petals are further forced to be further inserted into spaces among the upper petals, the outer profile diameters of the upper petals and the lower petals are increased, the expansion pipe is forced to deform, and finally the expansion pipe is attached to an upper-layer casing pipe, and slips and a rubber cylinder on the slips packer are set by the pressure in the center pipe B. And then continuing to pressurize, shearing the latch pin under the action of pressure to separate the central pipe A from the central pipe B, and moving the hydraulic expansion cone upwards under the action of pressure so that the expansion pipe section above the hydraulic expansion cone is continuously expanded by the hydraulic expansion cone. After the expansion of the expansion pipe is completed, the flexible rope is pulled in a mode of lifting the drill rod small, the flexible rope pulls the central pipe B to unseal the slip packer, and therefore the slip packer is lifted out of the well. Therefore, the operation process has stronger operability and simpler construction process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the rubber seal of FIG. 1;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 4 is a schematic diagram of a slip packer.
In the figure: 1-expansion pipe, 2-upper mounting plate, 3-upper petal, 4-metal sealing ring, 5-lower petal, 6-lower mounting plate, 7-rubber sealing element, 8-piston, 9-piston sleeve, 10-central pipe A, 11-flexible rope, 12-slip packer, 13-plug, 14-support ring, 15-leather bowl part, 16-upper support sleeve, 17-lower support sleeve, 18-central pipe B, 19-finger structure, 20-containing cavity, 21-liquid passing hole and 22-bolt.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the embodiment comprises a hydraulic expansion cone and an expansion pipe 1, wherein the hydraulic expansion cone is provided with a central pipe A10, an upper mounting plate 2, an upper petal 3, a lower mounting plate 6, a lower petal 5, a piston 8 and a piston sleeve 9, the upper mounting plate 2, the upper petal 3, the lower mounting plate 6, the lower petal 5, the piston 8 and the piston sleeve 9 are all sleeved on the central pipe A10, the piston sleeve 9 is fixedly connected on the central pipe A10, the piston 8 is installed in the piston sleeve 9, a liquid passing hole 21 is correspondingly arranged on the central pipe A10 and at the lower end of the piston 8, the upper mounting plate 2 is fixedly connected with the central pipe A10, the lower mounting plate 6 is slidably installed on the central pipe A10 and can slide upwards under the pushing of the piston 8, the upper end of the upper petal 3 is installed on the upper mounting plate 2 through a slider mechanism, the lower end of the lower petal 5 is installed on the lower mounting plate 6 through the slider mechanism so that the upper petal 3 and the lower petal 5 can slide along the radial direction of the upper mounting plate 2 or the, the number of the upper petals 3 and the number of the lower petals 5 are respectively three, the lower ends of the three upper petals 3 are staggered with the upper ends of the three lower petals 5, and the expansion pipe 1 is sleeved on the outer side of the hydraulic expansion cone. The above structure is the structure existing in the prior art, and is not described in detail herein.
The important innovation of the invention is that: the invention also includes a seal assembly and a slip packer 12;
the seal assembly structurally comprises a rubber seal 7, an upper support sleeve 16 and a lower support sleeve 17, wherein the upper support sleeve 16 and the lower support sleeve 17 are sleeved outside a central pipe A10, the lower end of the upper support sleeve 16 and the upper end of the lower support sleeve 17 are respectively provided with a group of fingers 19, the two groups of fingers 19 are arranged in a crossed mode, so that the upper support sleeve 16 and the lower support sleeve 17 can move relatively along the axial direction, the rubber seal 7 is supported from the inner side continuously in the process that the rubber seal 7 is compressed, and the rubber seal 7 cannot be compressed continuously after being compressed to a required degree, and therefore the piston 8 can be guaranteed to be capable of downwards mounting the disc 6 to have enough thrust. The rubber sealing element 7 is used for sealing a gap between the hydraulic expansion cone and the expansion pipe 1 so as to generate hydraulic thrust on the lower side of the hydraulic expansion cone to achieve the purpose of pushing the hydraulic expansion cone to move upwards integrally.
A central pipe B18 is arranged in the slip packer 12, the upper end of a central pipe B18 is connected with the lower end of a central pipe A10 through a bolt 22, the connection position is sealed through a sealing ring, and the lower end of a central pipe B18 is connected with a plug 13. It should be noted that the slip packer 12 of FIG. 1 is a common type of packer, and the present invention uses this packer to block the passage in the tailpipe to prevent pressure from leaking into the formation; 2. the present invention utilizes a pull-up unset slip packer 12, which is also conventional in the art and will not be described further herein.
In the invention, a flexible rope 11 is connected between the lower end of the hydraulic expansion cone and the upper end of a slip packer 12, an accommodating cavity 20 for accommodating the flexible rope 11 is arranged between the lower part of the piston sleeve 9 and a central pipe A10, and the flexible rope 11 has a redundancy of 10m-20m in the accommodating cavity 20.
The outside of expansion pipe 1 is inlayed and is had metal seal ring 4, and after 1 diameter of expansion pipe was propped up, metal seal ring 4 was pressed from both sides between 1 outer wall of expansion pipe and the intraductal wall of sleeve to seal the gap between 1 and the sleeve pipe of expansion pipe. In specific implementation, the metal sealing ring 4 can be made of copper or soft iron.
When the device is used, firstly, the piston 8 slides upwards and pushes the lower mounting disc 6 through a channel in the center of a small drill rod to press the central pipe A10 and the central pipe B18, the pressure in the central pipe A10 enables the piston 8 to slide upwards and further forces each lower petal 5 to be further inserted into a space between each upper petal 3, the outer contour diameter of each upper petal 3 and each lower petal 5 is enlarged, the expansion pipe 1 is forced to deform and finally attached to an upper-layer casing pipe, and slips and rubber cylinders on the slip packer 12 are sealed through the pressure in the central pipe B18. After that, the pressurization is continued, the bolt 22 is sheared under the action of the pressure, so that the central pipe A10 and the central pipe B18 are separated, the hydraulic expansion cone moves upwards under the action of the pressure, and the section of the expansion pipe 1 above the hydraulic expansion cone is expanded by the hydraulic expansion cone continuously. After the expansion of the expansion pipe 1 is completed, the flexible rope 11 is pulled by lifting the drill pipe, and the flexible rope 11 pulls the central pipe B18 to unseal the slip packer 12, so that the slip packer 12 is lifted out of the well. Therefore, the operation process has stronger operability and simpler construction process.
As a further technical solution, a cup portion 15 is provided at the lower edge of the rubber seal 7, and an opening of the cup portion 15 faces downward. The leather bowl portion 15 can maintain a reliable seal even after the expansion pipe 1 is increased in diameter, thereby improving the reliability of the present invention.
As a further technical solution, the flexible rope 11 is made of steel wire or carbon fiber. Of course, other materials with high tensile strength and high flexibility may be used.
As a further technical scheme, an annular groove is formed in the outer side of the rubber sealing piece 7, and a supporting ring 14 surrounded by a serpentine spring is arranged in the annular groove. The support ring 14 can expand as the rubber seal 7 expands, thereby supporting the rubber seal 7 from the axial direction, increasing the pressure-bearing capacity of the rubber seal 7.
As a further technical scheme, the serpentine spring is formed by bending a spring steel plate.
Claims (6)
1. A metal sealed type tail pipe hanger comprises a hydraulic expansion cone and an expansion pipe (1), wherein a central pipe A (10), an upper mounting disc (2), upper petals (3), a lower mounting disc (6), lower petals (5), a piston (8) and a piston sleeve (9) are arranged on the hydraulic expansion cone, the upper mounting disc (2), the upper petals (3), the lower mounting disc (6), the lower petals (5), the piston (8) and the piston sleeve (9) are sleeved on the central pipe A (10), the piston sleeve (9) is fixedly connected to the central pipe A (10), the piston (8) is installed in the piston sleeve (9), a liquid passing hole (21) is correspondingly arranged on the central pipe A (10) and at the lower end face of the piston (8), the upper mounting disc (2) is fixedly connected with the central pipe A (10), the lower mounting disc (6) is slidably installed on the central pipe A (10) and can slide upwards under the pushing of the piston (8), go up the upper end of petal (3) and pass through slider mechanism and install on last mounting disc (2), thereby the lower extreme of lower petal (5) passes through slider mechanism and installs on mounting disc (6) down and make upper petal (3) and lower petal (5) along the radial slip of last mounting disc (2) or lower mounting disc (6), and upper petal (3) respectively have threely with lower petal (5), and the lower extreme of three upper petal (3) is crisscross with the upper end of three lower petal (5), inflation pipe (1) cover is in the hydraulic pressure inflation awl outside, its characterized in that:
further comprising a seal assembly and a slip packer (12);
the sealing assembly structurally comprises a rubber sealing element (7), an upper supporting sleeve (16) and a lower supporting sleeve (17), wherein the upper supporting sleeve (16) and the lower supporting sleeve (17) are sleeved on the outer side of the central tube A (10), the lower end of the upper supporting sleeve (16) and the upper end of the lower supporting sleeve (17) are respectively provided with a group of finger-shaped structures (19), and the two groups of finger-shaped structures (19) are arranged in a crossed mode;
a central pipe B (18) is arranged in the slip packer (12), the upper end of the central pipe B (18) is connected with the lower end of the central pipe A (10) through a bolt (22), the connection part is sealed through a sealing ring, and the lower end of the central pipe B (18) is connected with a plug (13);
a soft rope (11) is connected between the lower end of the hydraulic expansion cone and the upper end of the slip packer (12), an accommodating cavity (20) for accommodating the soft rope (11) is arranged between the lower part of the piston sleeve (9) and the central pipe A (10), and the soft rope (11) is provided with redundancy of 10m-20m in the accommodating cavity (20);
and a metal sealing ring (4) is embedded on the outer side of the expansion pipe (1).
2. The metal seal type liner hanger according to claim 1, wherein: the lower edge of the rubber sealing piece (7) is provided with a leather cup part (15), and the opening of the leather cup part (15) faces downwards.
3. The metal seal type liner hanger according to claim 1, wherein: the soft rope (11) is made of steel wires.
4. The metal seal type liner hanger according to claim 1, wherein: the soft rope (11) is made of carbon fiber.
5. The metal seal type liner hanger according to claim 3, wherein: and an annular groove is formed in the outer side of the rubber sealing element (7), and a support ring (14) surrounded by a serpentine spring is arranged in the annular groove.
6. The metal seal type liner hanger according to claim 5, wherein: the serpentine spring is formed by bending a spring steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020147350.1U CN211648105U (en) | 2020-01-25 | 2020-01-25 | Metal sealing type tail pipe hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020147350.1U CN211648105U (en) | 2020-01-25 | 2020-01-25 | Metal sealing type tail pipe hanger |
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| Publication Number | Publication Date |
|---|---|
| CN211648105U true CN211648105U (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020147350.1U Active CN211648105U (en) | 2020-01-25 | 2020-01-25 | Metal sealing type tail pipe hanger |
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| CN (1) | CN211648105U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458222A (en) * | 2022-02-15 | 2022-05-10 | 大庆长垣能源科技有限公司 | Oil gas engineering integration well completion system |
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2020
- 2020-01-25 CN CN202020147350.1U patent/CN211648105U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458222A (en) * | 2022-02-15 | 2022-05-10 | 大庆长垣能源科技有限公司 | Oil gas engineering integration well completion system |
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