CN211008547U - Single-cylinder three-well wellhead device - Google Patents
Single-cylinder three-well wellhead device Download PDFInfo
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- CN211008547U CN211008547U CN201922210455.7U CN201922210455U CN211008547U CN 211008547 U CN211008547 U CN 211008547U CN 201922210455 U CN201922210455 U CN 201922210455U CN 211008547 U CN211008547 U CN 211008547U
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Abstract
The utility model provides a single-cylinder three-well wellhead assembly contains: the single-well wellhead device comprises a water-stop base plate, a water-stop guide pipe and three identical and mutually non-interfering single-well wellhead devices, wherein the water-stop base plate and the water-stop guide pipe are arranged on a well notch; the water-resisting guide pipe is embedded in the water-resisting base plate; the single-well wellhead device comprises a bottom layer trimming casing head, a trimming oil pipe four-way joint, an oil pipe head reducing joint and an integral Christmas tree which are sequentially connected from bottom to top above the ground surface; the bottom layer trimming casing head is arranged above the waterproof base plate and is fixedly connected with the waterproof base plate; the single-well wellhead device is also vertically provided with a surface casing, a technical casing and an oil pipe which are sequentially sleeved from outside; the surface casing pipe penetrates through the riser pipe. Through the utility model discloses can open in a well groove and adopt the oil reservoir in three different stratum. Effectively reduce the quantity of exploitation platform, reduce platform development cost.
Description
Technical Field
The utility model relates to an oil development equipment, in particular to single-cylinder three-well wellhead assembly.
Background
At present, the well head device which is widely used is a single well device or a single-cylinder double well device, the traditional well head device only can extract oil of one oil layer or two sections in the well drilling and completion process, and for offshore and onshore oil field development, more wells are always expected to be drilled by using limited well slots or production wells are drilled as much as possible through a water-proof guide pipe of the well head device, so that the cost can be saved, and the development benefit can be improved.
In the prior art, a cable crossing device penetrates through a tubing hanger of a wellhead device, and is connected with an electric submersible pump which is lowered to the bottom of a well together with an oil pipe through the cable crossing device to provide power for the electric submersible pump. If can have a plurality of electric submersible pumps to transfer to the shaft bottom, can more effectual reduction oil recovery later stage well pressure, improve oil well output. However, multiple electrical submersible pumps require multiple wireline penetrators to be installed, thus placing further demands on the wellhead.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a single-cylinder three-well wellhead assembly. A riser pipe is arranged in the well slot, and three independent well bores are drilled in the riser pipe. The single-cylinder three-well wellhead device provided by the invention ensures that three well bores are not interfered with each other in production, and can be used for producing oil layers of three different stratums in one well groove, so that the platform space is saved, and the oil production efficiency is improved. Simultaneously the utility model discloses still set up a cable that corresponds respectively for three well and pass through the ware, can pass through the ware with the cable and go into down to the electric submersible pump that corresponds the well, effectively reduce the well internal pressure, improve oil well output.
In order to achieve the above object, the utility model provides a single-cylinder three-well wellhead assembly, it has three independent well to bore in the well casing, contains: the system comprises a water-stop base plate, a water-stop guide pipe and three identical single-well wellhead devices which are not mutually interfered, wherein the water-stop base plate is arranged on a well notch; each single well wellhead device corresponds to one well;
the water-resisting base disc is of a cylindrical structure;
the top of the riser pipe is embedded in the riser base plate, the bottom of the riser pipe is positioned at the bottom of the well slot, and the central shafts of the riser pipe and the riser base plate are vertical to the horizontal plane;
the single well wellhead assembly comprises: the bottom layer trimming casing head, the trimming oil pipe four-way joint, the oil pipe head reducing joint and the integral Christmas tree are sequentially connected from bottom to top; the bottom layer trimming casing head is arranged above the waterproof base plate and is fixedly connected with the waterproof base plate;
a surface casing, a technical casing and an oil pipe which are sequentially sleeved from outside are vertically arranged in the single-well wellhead device in a penetrating manner; the bottoms of the surface casing, the technical casing and the oil pipe are all positioned at the bottom of the well slot; the surface casing pipe penetrates through the water-resisting guide pipe, and the top of the surface casing pipe is positioned in the water-resisting base plate and does not extend out of the top of the water-resisting base plate; the top of the technical sleeve is positioned in the bottom layer trimming sleeve head and does not extend out of the top of the bottom layer trimming sleeve head; the top of the oil pipe is positioned in the side-cutting oil pipe four-way joint and does not extend out of the top of the side-cutting oil pipe four-way joint.
The single-well wellhead device further comprises a bottom-layer slip type casing hanger which is embedded in the water-resisting base plate, is positioned between the water-resisting base plate and the surface casing and is used for hanging and sealing the surface casing.
The single-well wellhead device further comprises a slip type casing hanger which is embedded into the bottom layer trimming casing head, is positioned between the bottom layer trimming casing head and the technical casing and is used for hanging and sealing the technical casing.
The single-well wellhead device also comprises a metal sealing tubing hanger which is embedded in the side cutting tubing four-way, is positioned between the side cutting tubing four-way and the tubing and is used for hanging and sealing the tubing; the bottom of the reducing joint of the oil pipe head is fixedly connected with the top of the metal sealing oil pipe hanger; the integral Christmas tree, the tubing head reducing joint and the metal sealing tubing hanger are communicated with each other.
The single well wellhead assembly further comprises a wireline penetrator; the first end of the cable traversing device is positioned outside the oil pipe reducing joint, and the second end of the cable traversing device continuously downwards penetrates through the metal sealing oil pipe hanger after penetrating through the side wall of the oil pipe reducing joint from the outside and enters the side cutting oil pipe four-way joint; the second end of the cable traversing device and the oil pipe are lowered to the bottom of the well groove from the side-cutting oil pipe cross; and a cable is lowered through the cable crossing device to provide electric energy for the electric submersible pump in the corresponding oil pipe.
The top and the bottom of the bottom layer trimming casing head and the top and the bottom of the trimming oil pipe cross are respectively provided with a trimming flange; the bottom of the bottom layer trimming casing head is fixedly connected with the top of the waterproof base plate through the trimming flange, the top of the bottom layer trimming casing head is fixedly connected with the bottom of the trimming oil pipe cross joint, and the top of the trimming oil pipe cross joint is fixedly connected with the bottom of the oil pipe head reducing joint; and three single well wellheads are prevented from interfering with each other by the trim flanges.
And a grease injection hole is vertically arranged on the side wall of the water-resisting base plate in a penetrating manner, and the water-resisting guide pipe is sealed through the grease injection hole and pressure testing is carried out.
And a plurality of cement supplementing holes are vertically arranged on the side wall of the water-resisting base plate in a penetrating manner, and cement is supplemented between the water-resisting base plate and the water-resisting guide pipe through the cement supplementing holes.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) three independent single-well wellhead devices are arranged on the same wellhead together with the overcut flange, and share a water-resisting base plate and a water-resisting guide pipe, so that the volume of the single-cylinder three-well wellhead device is effectively reduced; meanwhile, the sealing reliability is further improved by the shared riser pipe.
2) Three single-well wellhead devices correspond to three different well bores in the same well groove, and oil layers of three different stratums or three different sections can be produced in one well groove. The oil recovery amount can be effectively increased, the number of the mining platforms is reduced, and the development cost of the mining platforms is reduced.
3) And each single-well wellhead device is provided with a cable penetrator, and various types of cables are lowered through the cable penetrator to provide electric energy for the electric submersible pump in the corresponding well. The pressure in the well at the later stage of oil production is reduced through the electric submersible pump, and the oil yield is improved.
4) The utility model discloses can work for a long time job stabilization, the reliability is high, long service life.
Drawings
In order to illustrate the technical solution of the present invention more clearly, the drawings needed for the description will be briefly introduced below, and it is obvious that the drawings in the following description are an embodiment of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to these drawings:
FIG. 1 is a perspective view of a single-cylinder triple-well wellhead assembly of the present invention;
FIG. 2 is a schematic view of the single-well wellhead device of the present invention with a surface casing, a technical casing and an oil pipe inside;
FIG. 3 is an elevation view of a single well wellhead assembly of the present invention;
FIG. 4 is a top view of the single-barrel triple-well wellhead assembly of the present invention;
fig. 5 is a top view of the water-stop base plate, the water-stop pipe, the surface casing, the technical casing and the oil pipe of the present invention;
fig. 6 is a schematic view of a three-dimensional structure of a bottom-layer trimming casing head of the present invention;
FIG. 7 is a schematic view of the four-way structure of the trimming oil pipe of the present invention;
FIG. 8 is an enlarged view of a portion of FIG. 1 at the location indicated by the dashed line box;
FIG. 9 is an enlarged partial view of the location indicated by the dashed box in FIG. 2;
in the figure: 1. a water-resisting base plate; 2. a bottom layer trimming casing head; 3. the edge cutting oil pipe is four-way; 4. a bottom layer slip type casing hanger; 5. a slip-type casing hanger; 6. a metal sealing tubing hanger; 7. the tubing head reducing joint; 8. an integral production tree; 9. a grease injection hole; 10. pipe blocking; 11. a riser pipe; 12. a surface casing; 13. a technical sleeve; 14. an oil pipe; 15. and a cable traversing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
To improve the utilization of the well slots, a plurality of formations of oil are produced through one well slot, in which a plurality of boreholes are drilled. In this application, three separate boreholes are drilled within one well casing.
The utility model provides a single-cylinder triple-well wellhead device, as shown in figure 1, contains: the device comprises a water-stop base plate 1 arranged on a well notch, a water-stop guide pipe 11 and three identical single-well wellhead devices which do not interfere with each other, wherein each single-well wellhead device corresponds to a well hole. Figure 4 is the utility model discloses a single-cylinder triple well wellhead assembly top view.
As shown in fig. 1, the water-stop base 1 has a cylindrical structure. And a grease injection hole 9 is vertically arranged on the side wall of the water-resisting base plate 1 in a penetrating manner, and the water-resisting guide pipe 11 is sealed through the grease injection hole 9 and is subjected to pressure testing.
And a plurality of cement supplementing holes are vertically arranged on the side wall of the water-resisting base plate 1 in a penetrating manner, and cement is supplemented between the water-resisting base plate 1 and the water-resisting guide pipe 11 through the cement supplementing holes. As shown in fig. 1, a pipe plug 10 is arranged outside the cement supplementing hole.
As shown in fig. 5, the top of the riser pipe 11 is embedded in the riser base plate 1, the bottom of the riser pipe 11 is located at the bottom of the well, and the central axes of the riser pipe 11 and the riser base plate 1 are both perpendicular to the horizontal plane.
As shown in fig. 1, 2 and 3, the single well wellhead assembly comprises: the bottom layer edge cutting casing head 2, the edge cutting oil pipe four-way joint 3, the oil pipe head reducing joint 7 and the integral Christmas tree 8 are sequentially connected from bottom to top. As shown in fig. 1, 6 and 7, the top and the bottom of the bottom layer trimming casing head 2 and the top and the bottom of the trimming oil pipe cross 3 are respectively provided with a trimming flange. Through the side cut flange realizes bottom side cut casing head bottom fixed connection water proof base plate top, bottom side cut casing head top fixed connection side cut oil pipe cross bottom, side cut oil pipe cross top fixed connection oil pipe head reducing joint bottom, and pass through the side cut flange prevents that three single well wellhead assembly from interfering mutually.
As shown in fig. 2, 5, 8 and 9, a surface casing 12, a technical casing 13 and an oil pipe 14 are vertically arranged in the single-well wellhead device in a penetrating manner. The riser pipe 11 is sleeved on the periphery of the surface casing pipe 12, the surface casing pipe 12 is sleeved on the periphery of the technical casing pipe 13, and the technical casing pipe 13 is sleeved on the periphery of the oil pipe 14. The bottoms of the surface casing 12, the technical casing 13 and the oil pipe 14 are all positioned at the bottom of the well slot; the top of the surface casing is positioned in the water-resisting base plate 1 and does not extend out of the top of the water-resisting base plate 1; the top of the technical sleeve 13 is positioned in the bottom layer trimming sleeve head 2 and does not extend out of the top of the bottom layer trimming sleeve head 2; the top of the oil pipe 14 is positioned in the edge cutting oil pipe four-way joint 3 and does not extend out of the top of the edge cutting oil pipe four-way joint 3.
As shown in fig. 2, the single well wellhead assembly further comprises: a bottom layer slip type casing hanger 4, a slip type casing hanger 5, a metal sealing oil pipe hanger 6 and a cable traversing device 15.
As shown in fig. 8 and 9, the bottom layer slip casing hanger 4 is embedded in the water-resisting base disc 1 and located between the water-resisting base disc 1 and the surface casing 12 for hanging and sealing the surface casing 12.
The slip-type casing hanger 5 is embedded in the bottom layer trimming casing head 2, is positioned between the bottom layer trimming casing head 2 and the technical casing 13, and is used for hanging and sealing the technical casing 13.
The metal sealing oil pipe hanger 6 is embedded in the side cutting oil pipe four-way joint 3, is positioned between the side cutting oil pipe four-way joint 3 and the oil pipe, and is used for hanging and sealing the oil pipe. The bottom of the reducing joint of the oil pipe head is fixedly connected with the top of the metal sealing oil pipe hanger 6. The integral Christmas tree 8, the tubing head reducing joint 7 and the metal sealing tubing hanger 6 are communicated with each other.
The first end of the cable traversing device is positioned outside the oil pipe reducing joint, and the second end of the cable traversing device is penetrated through the side wall of the oil pipe reducing joint from the outside and then continuously penetrates through the metal sealing oil pipe hanger 6 downwards to enter the side cutting oil pipe four-way joint 3; the second end of the cable traversing device and the oil pipe are lowered to the bottom of the well groove from the side-cutting oil pipe four-way joint 3; and lowering the cable through the cable crossing device 15 to provide electric energy for the electric submersible pump in the corresponding oil pipe.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) three independent single-well wellhead devices are arranged on the same wellhead together with the overcut flange, and share a water-resisting base plate 1 and a water-resisting guide pipe 11, so that the volume of the single-cylinder three-well wellhead device is effectively reduced; and the sealing reliability is further improved by the shared riser pipe 11.
2) Three single-well wellhead devices correspond to three different well bores in the same well groove, and oil layers of three different stratums or three different sections can be produced in one well groove. The oil recovery amount can be effectively increased, the number of the mining platforms is reduced, and the development cost of the mining platforms is reduced.
3) Each single-well wellhead device is provided with a cable penetrator 15, and various types of cables are lowered through the cable penetrator 15 to provide electric energy for the electric submersible pump in the corresponding well. The pressure in the well at the later stage of oil production is reduced through the electric submersible pump, and the oil yield is improved.
4) The utility model discloses can work for a long time job stabilization, the reliability is high, long service life.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A single-barrel triple-well head assembly having three separate wells drilled in a well casing, comprising: the system comprises a water-stop base plate, a water-stop guide pipe and three identical single-well wellhead devices which are not mutually interfered, wherein the water-stop base plate is arranged on a well notch; each single well wellhead device corresponds to one well;
the water-resisting base disc is of a cylindrical structure;
the top of the riser pipe is embedded in the riser base plate, the bottom of the riser pipe is positioned at the bottom of the well slot, and the central shafts of the riser pipe and the riser base plate are vertical to the horizontal plane;
the single well wellhead assembly comprises: the bottom layer trimming casing head, the trimming oil pipe four-way joint, the oil pipe head reducing joint and the integral Christmas tree are sequentially connected from bottom to top; the bottom layer trimming casing head is arranged above the waterproof base plate and is fixedly connected with the waterproof base plate;
a surface casing, a technical casing and an oil pipe which are sequentially sleeved from outside are vertically arranged in the single-well wellhead device in a penetrating manner; the bottoms of the surface casing, the technical casing and the oil pipe are all positioned at the bottom of the well slot; the surface casing pipe penetrates through the water-resisting guide pipe, and the top of the surface casing pipe is positioned in the water-resisting base plate and does not extend out of the top of the water-resisting base plate; the top of the technical sleeve is positioned in the bottom layer trimming sleeve head and does not extend out of the top of the bottom layer trimming sleeve head; the top of the oil pipe is positioned in the side-cutting oil pipe four-way joint and does not extend out of the top of the side-cutting oil pipe four-way joint.
2. The monowell wellhead assembly according to claim 1, further comprising a bottom slip casing hanger disposed embedded within the riser base and between the riser base and the surface casing for hanging and sealing the surface casing.
3. The single-barrel triple-well wellhead assembly according to claim 1, further comprising a slip-type casing hanger disposed embedded within the bottom-cut casing head and between the bottom-cut casing head and the technical casing for hanging and sealing the technical casing.
4. The single-barrel triple-well head assembly according to claim 1, further comprising a metal seal tubing hanger embedded in the trim tubing spool and positioned between the trim tubing spool and the tubing for hanging and sealing the tubing; the bottom of the reducing joint of the oil pipe head is fixedly connected with the top of the metal sealing oil pipe hanger; the integral Christmas tree, the tubing head reducing joint and the metal sealing tubing hanger are communicated with each other.
5. The single-barrel triple-well wellhead assembly according to claim 4, further comprising a wireline penetrator; the first end of the cable traversing device is positioned outside the oil pipe reducing joint, and the second end of the cable traversing device continuously downwards penetrates through the metal sealing oil pipe hanger after penetrating through the side wall of the oil pipe reducing joint from the outside and enters the side cutting oil pipe four-way joint; the second end of the cable traversing device and the oil pipe are lowered to the bottom of the well groove from the side-cutting oil pipe cross; and a cable is lowered through the cable crossing device to provide electric energy for the electric submersible pump in the corresponding oil pipe.
6. The single-barrel triple-well wellhead assembly according to claim 1, wherein the top and bottom of the bottom-cut casing head and the top and bottom of the cut tubing spool are provided with cut flanges, respectively; the bottom of the bottom layer trimming casing head is fixedly connected with the top of the waterproof base plate through the trimming flange, the top of the bottom layer trimming casing head is fixedly connected with the bottom of the trimming oil pipe cross joint, and the top of the trimming oil pipe cross joint is fixedly connected with the bottom of the oil pipe head reducing joint; and three single well wellheads are prevented from interfering with each other by the trim flanges.
7. The single-cylinder triple-well wellhead assembly according to claim 1, wherein a grease injection hole is vertically formed in a side wall of the water-stop base plate, and the water-stop guide pipe is sealed through the grease injection hole and pressure testing is performed.
8. The single-cylinder three-well wellhead assembly according to claim 1, wherein a plurality of cement replenishing holes are vertically formed in the side wall of the water-stop base plate, and cement is replenished between the water-stop base plate and the water-stop guide pipe through the cement replenishing holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922210455.7U CN211008547U (en) | 2019-12-11 | 2019-12-11 | Single-cylinder three-well wellhead device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922210455.7U CN211008547U (en) | 2019-12-11 | 2019-12-11 | Single-cylinder three-well wellhead device |
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| CN211008547U true CN211008547U (en) | 2020-07-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412339A (en) * | 2020-12-03 | 2021-02-26 | 中国海洋石油集团有限公司 | Single-cylinder three-well surface drilling method by using space-occupying drilling tool method |
| CN112878943A (en) * | 2021-01-28 | 2021-06-01 | 中国海洋石油集团有限公司 | Method for reconstructing offshore single-cylinder single well into single-cylinder multi-well |
| CN114059954A (en) * | 2021-11-29 | 2022-02-18 | 苏州道森钻采设备股份有限公司 | Single-cylinder four-well wellhead device and oil (gas) production tree |
| CN116537733A (en) * | 2023-07-05 | 2023-08-04 | 中海石油气电集团有限责任公司 | Integrated wellhead device |
-
2019
- 2019-12-11 CN CN201922210455.7U patent/CN211008547U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412339A (en) * | 2020-12-03 | 2021-02-26 | 中国海洋石油集团有限公司 | Single-cylinder three-well surface drilling method by using space-occupying drilling tool method |
| CN112412339B (en) * | 2020-12-03 | 2022-11-22 | 中国海洋石油集团有限公司 | Single-cylinder three-well surface drilling method by using space-occupying drilling tool method |
| CN112878943A (en) * | 2021-01-28 | 2021-06-01 | 中国海洋石油集团有限公司 | Method for reconstructing offshore single-cylinder single well into single-cylinder multi-well |
| CN114059954A (en) * | 2021-11-29 | 2022-02-18 | 苏州道森钻采设备股份有限公司 | Single-cylinder four-well wellhead device and oil (gas) production tree |
| CN116537733A (en) * | 2023-07-05 | 2023-08-04 | 中海石油气电集团有限责任公司 | Integrated wellhead device |
| CN116537733B (en) * | 2023-07-05 | 2023-11-17 | 中海石油气电集团有限责任公司 | Integrated wellhead device |
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