CN114059954A - Single-cylinder four-well wellhead device and oil (gas) production tree - Google Patents
Single-cylinder four-well wellhead device and oil (gas) production tree Download PDFInfo
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- CN114059954A CN114059954A CN202111429943.2A CN202111429943A CN114059954A CN 114059954 A CN114059954 A CN 114059954A CN 202111429943 A CN202111429943 A CN 202111429943A CN 114059954 A CN114059954 A CN 114059954A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/0407—Casing heads; Suspending casings or tubings in well heads with a suspended electrical cable
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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Abstract
The invention discloses a single-cylinder four-well wellhead device and an oil (gas) production tree, which comprise a four-hole pile pipe water-resisting base disc, water-resisting pile pipes and four groups of same and non-interfering single-well wellhead devices and oil (gas) production trees, wherein the top of the four-hole pile pipe water-resisting base disc is provided with four groups of filling holes, the filling holes are used for filling cement into an annulus between the four-hole pile pipe water-resisting base disc and the water-resisting pile pipes, and the four-hole pile pipe water-resisting base disc is embedded and installed at the top of the water-resisting pile pipes. According to the single-cylinder four-well wellhead device and the oil (gas) production tree, four relatively independent wells are designed in the same waterproof pile pipe base plate through the quick connection structure, and four sets of relatively independent single-well wellhead devices and the oil (gas) production tree share one pile pipe waterproof base plate and one waterproof pile pipe, so that the problem that the installation space of an ocean platform is limited is effectively avoided; meanwhile, the sealing reliability is further improved, the drilling efficiency is improved, and the drilling and production cost is greatly reduced by sharing the waterproof pile pipe.
Description
Technical Field
The invention relates to the technical field of oil gas of ocean platforms, in particular to a single-cylinder four-well wellhead device and an oil (gas) production tree.
Background
Based on the current situation that the exploitation amount of offshore oil and gas resources is seriously unbalanced in China, the development and the utilization of the offshore oil and gas resources are enhanced, the current situation that the utilization of the energy resources in China is tight can be relieved, and the structure of the energy exploitation in China can be further improved. The development of the ocean oil and gas drilling platform technology is an important link for the exploitation of ocean energy resources. The well drilling platform technology is improved, the guarantee can be provided for realizing the safe construction of ocean oil and gas exploitation, and the capability and the technical level of China in the aspect of ocean technology application can be displayed to the world. Therefore, the method has milestone significance for strengthening the research on the drilling platform and the drilling equipment technology.
In recent years, although China's offshore oil and gas drilling well completion equipment industry achieves some achievements through technical introduction, cooperation, digestion, absorption, re-innovation and localization, compared with developed countries and internationalized industry leading enterprises with nearly hundred years of development history, the offshore oil and gas drilling well completion equipment industry still has a large gap. The design and manufacturing technology of the supporting equipment of the offshore drilling platform are similar to those of the land drilling equipment, but the requirements on configuration, performance, automation degree and the like are higher than those of the land drilling equipment.
Although China realizes localization on some advanced marine oil and gas equipment, the method basically stays in the manufacture of structural parts, corresponding matching technology is lagged, equipment innovation is relatively slow, key equipment and technology are still mastered in foreign enterprises, and the scale development and utilization of marine oil and gas in China are seriously influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a single-cylinder four-well wellhead device and an oil (gas) production tree, and solves the technical problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the single-cylinder four-well wellhead device and the oil (gas) production tree comprise a four-hole pile pipe water-resisting base disc, water-resisting pile pipes and four groups of same and non-interfering single-well wellhead devices and oil (gas) production trees, wherein the top of the four-hole pile pipe water-resisting base disc is provided with four groups of filling holes, the filling holes are used for filling cement into an annular space between the four-hole pile pipe water-resisting base disc and the water-resisting pile pipes, the four-hole pile pipe water-resisting base disc is embedded and installed at the top of the water-resisting pile pipes, wherein,
the single-well wellhead device and the oil (gas) production tree comprise a sleeve four-way joint, an oil pipe head adapter, a combined oil (gas) production tree and a single-well wellhead device which are sequentially arranged from bottom to top, wherein the sleeve four-way joint is arranged above a four-hole pile pipe water-resisting base plate;
installing in the individual well wellhead assembly and sitting and putting suspension surface casing pipe, technical casing pipe, oil pipe, and surface casing pipe, technical casing pipe and oil pipe all extend four hole pile pipe water proof foundation plate and water proof pile pipe, surface casing pipe all sits through the hanger and hangs in four hole pile pipe water proof foundation plate to with upper and lower non-standard flange formula sleeve pipe cross bottom seal.
Preferably, the four-hole pile pipe water-stop base plate is cylindrical, a sealing detection hole is formed in the outer portion of the four-hole pile pipe water-stop base plate, and the sealing detection hole is used for detecting air tightness between the four-hole pile pipe water-stop base plate and the water-stop pile pipe.
Preferably, the inside of the refill hole is provided with a refill plug for sealing the refill hole.
Preferably, the bottom of the waterproof pile pipe is located in the center of the bottom of the well slot, and the centers of the waterproof pile pipe and the four-hole pile pipe waterproof base plate are perpendicular to the sea level.
Preferably, the technical casing is hung on a casing four-way bearing shoulder through a hanger, and forms a technical casing secondary seal with the bottom of the lower non-standard flange type oil pipe four-way.
Preferably, the tubing is hung in the tubing four-way joint through a hanger and sealed with the tubing head adapter.
Preferably, the core technology of the single-well wellhead device and the oil (gas) production tree is that the single-well wellhead device and the oil (gas) production tree have the function of simultaneously installing four sets of relatively independent cable penetrators, control pipelines and medicament pipelines, and production or production increasing operation of four different well positions and intervals of one shaft is realized.
Preferably, the upper part of the cable traversing device extends to the outside of the oil pipe head adapter through a sealing traversing hole reserved on the oil pipe head adapter, and the lower part of the cable traversing device extends to the position below the hanger through a sealing traversing hole reserved on the oil pipe hanger to provide electric energy for the electric submersible pump in the corresponding oil pipe.
(III) advantageous effects
Firstly, four relatively independent boreholes (shown as a dotted line frame in the attached drawing) are designed in the same waterproof pile pipe base plate through a quick connection structure, and four sets of relatively independent single-well wellhead devices and oil (gas) production trees share one pile pipe waterproof base plate and one waterproof pile pipe, so that the problem that the installation space of an ocean platform is limited is effectively avoided; meanwhile, the sealing reliability is further improved, the drilling efficiency is improved, and the drilling and production cost is greatly reduced by sharing the waterproof pile pipe.
Secondly, four sets of relatively independent single-well wellhead devices and oil (gas) production trees are designed and installed in four different independent well bores in the same shaft, and oil and gas of four different intervals and different reserves can be simultaneously produced in the same shaft. The method can greatly improve the oil (gas) production amount, reduce the construction quantity of the ocean exploitation platform and reduce the development investment cost of the ocean exploitation platform;
and thirdly, each wellhead device and the oil (gas) production tree are provided with cable penetrators, and different types of cables are placed through the cable penetrators to provide electric energy for the electric submersible pumps in the corresponding wellholes. The purposes of efficiency enhancement and yield increase are realized through the electric submersible pump, and the oil (gas) productivity is improved;
fourthly, the key core technology of the device is that the traditional flange connection structure is abandoned, and a quick connection structure is replaced, so that the purpose of drilling four independent well bores in one guiding/water-resisting pipe is achieved.
Drawings
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
FIG. 1 is an elevation view of a single-barrel four-well wellhead assembly and production tree of the present invention;
fig. 2 is an overall block diagram of a single-barrel four-well wellhead assembly and production (gas) tree of the present invention.
Illustration of the drawings: 1. a four-hole pile pipe water-resisting base plate; 2. filling a plug; 3. a sleeve four-way; 4. the oil pipe is four-way; 5. a cable pass-through device; 6. an tubing head adapter; 7. combined christmas (gas) trees.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction as the upper, lower, left, right, etc. of the drawings, and the terms "first", "second", etc. are used for descriptive distinction and have no special meaning.
Aiming at the problems in the prior art, the invention aims to design a single-cylinder four-well wellhead device and an oil (gas) production tree with a novel structure, which have a time-spanning significance.
And (3) setting a single waterproof pile pipe in a limited well slot, wherein four independent well bores are designed in the waterproof pile pipe. The single-cylinder four-well wellhead device and the oil (gas) production tree enable drilling, production increasing and production operations among four well bores to be not interfered with each other, can meet drilling requirements of different reservoirs or cluster horizontal wells, saves platform space and improves oil (gas) production efficiency.
Meanwhile, the invention also discloses a device for controlling the production of the oil (gas) well, which is characterized in that the four wells are respectively provided with a corresponding cable traversing device, a control pipeline interface, a medicament pipeline interface and a standby interface, so that the cable traversing device, the control pipeline and the medicament pipeline can be lowered into corresponding well bores, the underground pressure and the safety are effectively reduced, and the yield of the oil (gas) well is ensured.
In order to meet the functions, the invention designs a single-cylinder four-well wellhead device and an oil (gas) production tree, wherein four mutually independent well bores are drilled in a riser pipe well slot as small as possible, and the single-cylinder four-well wellhead device comprises: the device comprises a pile pipe water-stop base plate, a water-stop pile pipe, four identical single-well wellhead devices which do not interfere with each other and an oil (gas) production tree; each individual well head and production (gas) tree corresponds to an independent well bore.
The pile pipe water-stop base plate is designed into a cylindrical columnar structure, 4 independent cement injection holes are designed in the upper portion of the pile pipe water-stop base plate, and cement is injected into the annular space between the pile pipe water-stop base plate and the water-stop pile pipe through the cement injection holes.
The pile pipe water-stop base plate is embedded in the top of the water-stop pile pipe and is provided with a sealing test hole and a sealing test hole, the bottom of the water-stop pile pipe is positioned in the center of the bottom of the well slot, and the centers of the water-stop pile pipe and the pile pipe water-stop base plate are perpendicular to the sea level.
A single well head and production tree for each well, comprising: the oil pipe four-way joint comprises an upper non-standard flange type oil pipe four-way joint and a lower non-standard flange type oil pipe four-way joint, an oil pipe head adapter and a combined oil (gas) production tree, wherein the upper non-standard flange type sleeve four-way joint and the lower non-standard flange type sleeve four-way joint are sequentially arranged from bottom to top, and the sleeve four-way joint comprises the upper non-standard flange type sleeve four-way joint and the lower non-standard flange type sleeve four-way joint.
The upper and lower non-standard flange type sleeve four-way joint is arranged above the pile pipe water-resisting base plate, and is convenient to disassemble and assemble, firm and safe to fix. In the single-well wellhead device configured for each well, a bearing shoulder for seating and placing a suspension surface casing, a technical casing and an oil pipe is designed.
The bottom of the four-hole pile pipe base plate is designed into a quick clamping block and is provided with a sealing structure for locking and sealing the waterproof pile pipe. Surface casing pipes, technical casing pipes and oil pipes designed in the four-hole shaft extend through the pile pipe base plate and the waterproof pile pipe. The surface casing pipes of the four wells are all hung in the pile pipe water-stop base plate through the hanger and are in four-way connection with the upper and lower non-standard flange type casing pipes
The parts are designed into a secondary sealing structure.
The technical casing is hung in the upper and lower non-standard flange type casing four-way through a hanger, and a secondary sealing structure is designed between the technical casing and the bottoms of the upper non-standard flange type oil pipe four-way and the lower non-standard flange type oil pipe four-way.
The oil pipe is hung in the upper non-standard flange type oil pipe cross and the lower non-standard flange type oil pipe cross through the hanger, and a metal and nonmetal combined sealing structure is designed between the extension neck and the oil pipe head adapter.
The single-well wellhead device and the oil (gas) production tree are configured for each well, and the single-well wellhead device and the oil (gas) production tree further comprise a cable traversing device, a control pipeline and a medicament pipeline; the upper part of the cable traversing device extends to the outside of the cable traversing device through a sealing traversing hole reserved on the oil pipe head adapter, the lower part of the cable traversing device extends to the position below the hanger through a sealing traversing hole reserved on the oil pipe hanger, and the cable is lowered to the well bottom together with the oil pipe string through the traversing device to provide electric energy for the electric submersible pump in the corresponding oil pipe.
Four relatively independent boreholes (shown as a dotted line frame in the attached figure) are designed in the same waterproof pile pipe base plate through a quick connection structure, four sets of relatively independent single-well wellhead devices and oil (gas) production trees share one set of pile pipe waterproof base plate and waterproof pile pipe, and the problem that the installation space of an ocean platform is limited is effectively avoided; meanwhile, the sealing reliability is further improved, the drilling efficiency is improved, and the drilling and production cost is greatly reduced by sharing the waterproof pile pipe.
Four sets of relatively independent single-well wellhead devices and oil (gas) production trees are used for designing and installing four different independent well bores in the same shaft, and oil and gas of four different intervals and different reserves can be simultaneously produced in the same shaft. The method can greatly improve the oil (gas) production amount, reduce the construction quantity of the ocean exploitation platform and reduce the development investment cost of the ocean exploitation platform;
and each wellhead device and the oil (gas) production tree are provided with cable penetrators, and different types of cables are placed through the cable penetrators to provide electric energy for the electric submersible pumps in the corresponding wellholes. The purposes of efficiency enhancement and yield increase are realized through the electric submersible pump, and the oil (gas) productivity is improved;
the key core technology of the device is that a traditional flange connection structure is abandoned, and a quick connection structure is replaced, so that the purpose of drilling four independent well bores in one guiding/water-resisting pipe is achieved.
The content in the dotted line is what the application is to protect (i.e. the combination mode and connection structure of four sets of identical and non-interfering single-well wellhead devices and production (gas) trees), and secondly, the combined production (gas) tree in the application is the prior art.
Examples
Referring to fig. 1 and 2, the invention provides a single-cylinder four-well wellhead device and an oil (gas) production tree, comprising a four-hole pile pipe water-stop base plate 1, water-stop pile pipes and four groups of same and non-interfering single-well wellhead devices and oil (gas) production trees, wherein the top of the four-hole pile pipe water-stop base plate 1 is provided with four groups of injection-supplementing holes, the injection-supplementing holes are used for supplementing cement to an annular space between the four-hole pile pipe water-stop base plate 1 and the water-stop pile pipes, the four-hole pile pipe water-stop base plate 1 is embedded and installed at the top of the water-stop pile pipes, wherein,
the single-well wellhead device and the oil (gas) production tree comprise a sleeve four-way joint 3, an oil pipe four-way joint 4, an oil pipe head adapter 6, a combined oil (gas) production tree 7 and the single-well wellhead device which are sequentially arranged from bottom to top, wherein the sleeve four-way joint 3 is arranged above a four-hole pile pipe water-resisting base plate 1;
the single well wellhead device is internally provided with a sitting and hanging surface casing, a technical casing and an oil pipe, the surface casing, the technical casing and the oil pipe extend through the four-hole pile pipe water-proof base plate 1 and the water-proof pile pipes, the surface casing is hung in the four-hole pile pipe water-proof base plate 1 through a hanger and sealed with the bottom of an upper non-standard flange type casing four-way joint and a lower non-standard flange type casing four-way joint.
Referring to fig. 2, the four-hole pile pipe water-stop base plate 1 is cylindrical and columnar, and a sealing detection hole is formed in the outer portion of the four-hole pile pipe water-stop base plate 1 and used for detecting air tightness between the four-hole pile pipe water-stop base plate and a water-stop pile pipe.
Referring to fig. 2, a refill plug 2 for sealing the refill hole is installed inside the refill hole.
Referring to fig. 2, the bottom of the riser pile pipe is located at the center of the bottom of the well, and the centers of the riser pile pipe and the four-hole pile pipe riser base plate 1 are both perpendicular to the sea level.
Referring to fig. 2, the technical casing is hung in the sleeve four-way joint 3 through a hanger and sealed with the bottom of the oil pipe four-way joint 4.
Referring to fig. 2, tubing is seated and suspended in the tubing spool 4 by a hanger and sealed from the tubing head adapter 6.
Referring to fig. 2, the single well wellhead assembly and production (gas) tree further comprises a cable crossing device 5, a control pipeline and a medicament pipeline.
Referring to fig. 2, the upper part of the cable penetrator 5 extends to the outside of the tubing head adapter 6 through a sealing through hole reserved on the tubing head adapter, and the lower part of the cable penetrator 5 extends to the lower part of the hanger through a sealing through hole reserved on the tubing hanger to supply power for an electric submersible pump in the corresponding tubing.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or processes in the figures are not necessarily required to practice this patent.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The disclosure is only for the concrete implementation of the patent, but the patent is not limited to the above, and any changes that can be made by those skilled in the art are intended to fall within the protection scope of the patent.
Claims (9)
1. Single-cylinder four-well wellhead device and oil (gas) production tree, its characterized in that: comprises a four-hole pile pipe water-resisting base plate (1), water-resisting pile pipes and four groups of same and non-interfering single-well wellhead devices and oil (gas) production trees, wherein the top of the four-hole pile pipe water-resisting base plate (1) is provided with four groups of filling holes, the filling holes are used for filling cement into an annular space between the four-hole pile pipe water-resisting base plate (1) and the water-resisting pile pipes, the four-hole pile pipe water-resisting base plate (1) is embedded and arranged at the top of the water-resisting pile pipes, each group of single-well wellhead devices and oil (gas) production trees are arranged at the top of the four-hole pile pipe water-resisting base plate (1),
the single-well wellhead device and the oil (gas) production tree comprise a sleeve four-way joint (3), an oil pipe four-way joint (4), an oil pipe head adapter (6), a combined oil (gas) production tree (7) and a single-well wellhead device which are sequentially arranged from bottom to top, wherein the sleeve four-way joint (3) is arranged above a four-hole pile pipe water-resisting base plate (1);
install surface casing, technical casing, oil pipe in the individual well wellhead assembly, and surface casing, technical casing and oil pipe all extend four hole pile pipe water proof foundation plate (1) and water proof pile pipe, surface casing all sits through the hanger and hangs in four hole pile pipe water proof foundation plate (1) to it is sealed with upper and lower non-standard flange formula sleeve pipe cross bottom.
2. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 1, wherein: the four-hole pile pipe water-stop base plate (1) is cylindrical, a sealing detection hole is formed in the outer portion of the four-hole pile pipe water-stop base plate (1), and the sealing detection hole is used for detecting air tightness between the four-hole pile pipe water-stop base plate and a water-stop pile pipe.
3. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 1, wherein: and a supplementary filling plug (2) for sealing the supplementary filling hole is arranged in the supplementary filling hole.
4. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 1, wherein: the bottom of the waterproof pile pipe is located in the center of the bottom of the well slot, and the central axes of the waterproof pile pipe and the four-hole pile pipe waterproof base plate (1) are perpendicular to the sea level.
5. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 1, wherein: the oil pipe four-way joint (4) comprises an upper non-standard flange type oil pipe four-way joint and a lower non-standard flange type oil pipe four-way joint.
6. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 5, wherein: the technical casing is hung in the casing four-way joint (3) through a hanger and sealed with the bottom of the oil pipe four-way joint (4).
7. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 1, wherein: the oil pipe is hung in the oil pipe four-way joint (4) through a hanger and sealed with the oil pipe head adapter (6).
8. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 1, wherein: the four-well wellhead device and the oil (gas) production tree comprise four groups of relatively independent cable penetrators (5), control pipelines and medicament pipelines.
9. The single-barrel, four-well wellhead assembly and production (gas) tree of claim 8, wherein: the upper part of the cable traversing device (5) extends to the outside of the oil pipe head adapter (6) through a sealing traversing hole reserved on the oil pipe head adapter, and the lower part of the cable traversing device (5) extends to the lower part of the hanger through a sealing traversing hole reserved on the oil pipe hanger to provide electric energy for the electric submersible pump in the corresponding oil pipe.
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| CN202111429943.2A CN114059954A (en) | 2021-11-29 | 2021-11-29 | Single-cylinder four-well wellhead device and oil (gas) production tree |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306340A (en) * | 2022-10-12 | 2022-11-08 | 威飞海洋装备制造有限公司 | Single-cylinder four-well wellhead oil production device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211008547U (en) * | 2019-12-11 | 2020-07-14 | 上海神开石油设备有限公司 | Single-cylinder three-well wellhead device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211008547U (en) * | 2019-12-11 | 2020-07-14 | 上海神开石油设备有限公司 | Single-cylinder three-well wellhead device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306340A (en) * | 2022-10-12 | 2022-11-08 | 威飞海洋装备制造有限公司 | Single-cylinder four-well wellhead oil production device |
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