CN117536573A - Simple underwater wellhead and christmas tree system device for shallow water injection well - Google Patents
Simple underwater wellhead and christmas tree system device for shallow water injection well Download PDFInfo
- Publication number
- CN117536573A CN117536573A CN202311654210.8A CN202311654210A CN117536573A CN 117536573 A CN117536573 A CN 117536573A CN 202311654210 A CN202311654210 A CN 202311654210A CN 117536573 A CN117536573 A CN 117536573A
- Authority
- CN
- China
- Prior art keywords
- wellhead
- christmas tree
- underwater
- shallow water
- water injection
- 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.)
- Pending
Links
- 241000191291 Abies alba Species 0.000 title claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 27
- 230000007246 mechanism Effects 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 8
- 239000012188 paraffin wax Substances 0.000 claims description 5
- 238000011161 development Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000002054 transplantation Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
-
- 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
- E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
- E21B34/04—Valve arrangements for boreholes or wells in well heads in underwater well heads
Abstract
The invention discloses a simple underwater wellhead and christmas tree system device for a shallow water injection well, which comprises: an underwater wellhead system; the underwater Christmas tree system is arranged inside the underwater wellhead system; the oil pipe hanger is arranged on the surface of the underwater Christmas tree system; and the inner tree cap is connected to the top of the underwater Christmas tree system. The invention has the advantages of simplicity and high efficiency, and solves the problems that the wellhead and the christmas tree for deep water are inconvenient to use, the development cost of the shallow water oil field is increased, and the development efficiency is reduced when the oil is extracted in the existing shallow water sea area.
Description
Technical Field
The invention relates to the technical field of marine petroleum and natural gas exploration drilling equipment, in particular to a simple underwater wellhead and christmas tree system device for a shallow water injection well.
Background
At present, in shallow water sea areas, a typical wellhead system is provided with a mud line suspension system and a simple underwater wellhead device, compared with the two wellhead types, the mud line suspension system has a complex process and needs to tie back each layer of sleeve; the simple underwater wellhead device is directly connected back to the surface blowout preventer through the vertical pipe, and the operation is simple.
Shallow water subsea tree systems commonly used abroad include mud line trees, simple vertical trees, simple horizontal trees. The three structural forms are that the mud line Christmas tree valve adopts a hand wheel mode, so that the switching operation is difficult; the valve is provided with a hydraulic actuator, a control system and a multi-point temperature and pressure sensor, remote operation can be realized, response time is faster, safety is higher, and cost is higher, and the valve is mainly designed for a production well (self-injection well).
Subsea wellhead development is one of the main modes of deep water field exploration and development, and the transplantation of subsea wellhead equipment to shallow water areas faces new difficulties and challenges. The development threshold of the underwater wellhead is high, particularly in shallow water, the single well yield is relatively low, and the wellhead and the christmas tree system which are commonly used in deep water cannot be used, so that most oil fields are difficult to realize economic and efficient development. How to optimize the functional configuration of the underwater wellhead and the underwater Christmas tree equipment, control the equipment cost and the operation cost, and is a device suitable for shallow water drilling operation, which is a problem to be solved urgently in a shallow water underwater wellhead mode
Disclosure of Invention
The invention aims to provide a simple underwater wellhead and christmas tree system device for a shallow water injection well, which has the advantages of simplicity and high efficiency, and solves the problems that the wellhead and the christmas tree for deep water are inconvenient to use, the development cost of a shallow water oil field is increased and the development efficiency is reduced when the oil is extracted in the existing shallow water sea area.
In order to achieve the above purpose, the present invention provides the following technical solutions: a simplified subsea wellhead and tree system assembly for a shallow water injection well, comprising:
an underwater wellhead system;
the underwater Christmas tree system is arranged inside the underwater wellhead system;
the oil pipe hanger is arranged on the surface of the underwater Christmas tree system;
and the inner tree cap is connected to the top of the underwater Christmas tree system.
The simple underwater wellhead and christmas tree system device for the shallow water injection well is preferable, the underwater wellhead system comprises a permanent guide base, a low-pressure wellhead is arranged in the permanent guide base, a high-pressure wellhead is arranged in the low-pressure wellhead, a casing hanger and an annular sealing assembly are respectively arranged in the high-pressure wellhead, and the annular sealing assembly seals the joint of the high-pressure wellhead and the casing hanger.
As a simple underwater wellhead and christmas tree system device for shallow water injection wells, the permanent guide base comprises four guide piles, and the surfaces of the guide piles are sleeved with first setting shoulders.
As an advantageous embodiment of the present invention, the low pressure wellhead includes a weld end and a second landing shoulder.
As the simple underwater wellhead and christmas tree system device for the shallow water injection well, the high-pressure wellhead head comprises a setting ring, a locking mechanism is arranged on the setting ring, a third setting shoulder is arranged in the setting ring, a first sealing surface is arranged on the inner wall of the third setting shoulder, a wellhead first locking surface and a wellhead second locking surface are arranged on the inner wall of the third setting shoulder and positioned at the top of the first sealing surface, a wellhead first connecting thread is arranged on the top of the inner wall of the third setting shoulder, and an annulus side outlet hole for installing an annulus valve is arranged on the surface of the third setting shoulder.
As the simple underwater wellhead and christmas tree system device for the shallow water injection well, the invention is preferable, the top and the bottom of the inner wall of the casing hanger are respectively provided with a wellhead second connecting thread and a wellhead third connecting thread, and the surface of the casing hanger is sequentially provided with an inclined end face, a wellhead third locking molded surface and an overflow hole from top to bottom.
Preferably, the annular sealing assembly comprises a metal seal, and a wellhead driving mechanism is arranged on the top of the metal seal.
As a simple underwater wellhead for a shallow water injection well and a production tree system device, the simple underwater wellhead and production tree system device is preferable, the underwater production tree system comprises a production tree main body, a production tree cap is arranged at the top of the production tree main body, a production main valve, a paraffin removal valve and a production wing valve are respectively arranged in the production tree main body, a bottom connector is arranged at the bottom of the production tree main body, a frame is connected to the surface of the bottom connector, and a base is connected to the bottom of the frame.
As a simple underwater wellhead and a Christmas tree system device for a shallow water injection well, the simple underwater wellhead and the Christmas tree system device are preferable, wherein a temperature pressure sensor, a first manual operation valve, a second manual operation valve and a third manual operation valve which are communicated with the simple underwater wellhead and the Christmas tree system device are respectively arranged on a Christmas tree main body.
As the simple underwater wellhead and the production tree system device for the shallow water injection well, the invention is preferable, the tubing hanger comprises a tubing hanger main body, the bottom of the tubing hanger main body is provided with a setting end surface, the bottom of the inner wall of the tubing hanger main body is provided with tubing connecting threads, the surface of the tubing hanger main body is respectively connected with a tubing locking molded surface and a tubing driving mechanism, and the bottom of the tubing driving mechanism is inserted into the tubing locking molded surface to excite the tubing locking molded surface;
the inner tree cap comprises a cap body, and a tree cap locking molded surface and a tree cap sealing mechanism are sleeved on the surface of the cap body.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with a shallow water underwater christmas tree, the device is a simple, low-cost, safe and efficient shallow water underwater wellhead and christmas tree system.
2. The traditional shallow water underwater Christmas tree system is mainly designed for a production well (a self-injection well), and the device is a well drilling and completion operation device for a shallow water injection well.
3. The water injection development effect is improved, and the problem that the platform has no well slot or the water injection target is far away is solved.
4. The method solves the great problem of transplanting the deep water underwater wellhead equipment to a shallow water area.
5. The problem of well completion under shallow water waters underwater wellhead mode is solved.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a front cross-sectional view of the subsea wellhead system of the present invention;
FIG. 3 is a schematic view of a permanent guide base structure according to the present invention;
FIG. 4 is a schematic view of the low pressure wellhead configuration of the present invention;
FIG. 5 is a schematic view of the structure of a high pressure wellhead according to the present invention;
FIG. 6 is a schematic illustration of a casing hanger of the present invention;
FIG. 7 is a schematic view of an annular seal assembly of the present invention;
FIG. 8 is a front cross-sectional view of the subsea tree system of the present invention;
FIG. 9 is a diagram of the pipeline and instrument connections of the subsea tree system of the present invention;
FIG. 10 is a schematic view of the structure of the tubing hanger of the present invention;
FIG. 11 is a schematic view of the structure of the inner tree cap of the present invention.
In the figure:
1. an underwater wellhead system; 2. a subsea tree system; 3. tubing hanger; 4. an inner tree cap;
101. a permanent guide base; 102. a low pressure wellhead; 103. a high pressure wellhead; 104. a casing hanger; 105. an annular seal assembly;
1011. a guide pile; 1012. A first landing shoulder;
1021. a welding end; 1022. A second landing shoulder;
1031. a setting ring; 1032. a locking mechanism; 1033. a third landing shoulder; 1034. a first sealing profile; 1035. a first locking profile of the wellhead; 1036. a second locking profile of the wellhead; 1037. a wellhead first connection thread; 1038. annulus side outlet;
1041. a wellhead second connection thread; 1042. An inclined end face; 1043. A third locking molded surface of the wellhead; 1044. a second sealing profile; 1045. An overflow hole; 1046. A third connecting thread of the wellhead;
1051. sealing the metal; 1052. A wellhead driving mechanism;
201. producing a main valve; 202. a paraffin removal valve; 203. a tree cap; 204. producing wing valves; 205. a temperature and pressure sensor; 206. a bottom connector; 207. a first manually operated valve; 208. a second manually operated valve; 209. a third manually operated valve; 210. a base; 211. a frame; 212. installing an indication and operation panel; 213. a tree body;
301. a sitting end surface; 302. an oil pipe connecting thread; 303. oil pipe locking molded surface; 304. an oil pipe driving mechanism; 305. a tubing hanger body;
401. a tree cap locking profile; 402. a tree cap sealing mechanism; 403. a cap body.
Detailed Description
Example 1
Referring to fig. 1-11, a simplified subsea wellhead and tree system assembly for a shallow water injection well, comprising:
a subsea wellhead system 1;
the underwater Christmas tree system 2 is arranged inside the underwater wellhead system 1;
the oil pipe hanger 3 is arranged on the surface of the underwater Christmas tree system 2;
an inner tree cap 4, the inner tree cap 4 being connected to the top of the subsea tree system 2.
Further, the underwater wellhead system 1 comprises a permanent guide base 101, a low-pressure wellhead 102 is arranged in the permanent guide base 101, a high-pressure wellhead 103 is arranged in the low-pressure wellhead 102, a casing hanger 104 and an annular sealing assembly 105 are respectively arranged in the high-pressure wellhead 103, and the annular sealing assembly 105 seals the joint of the high-pressure wellhead 103 and the casing hanger 104.
Further, the permanent guide base 101 comprises four guide piles 1011, and a first setting shoulder 1012 is sleeved on the surface of each guide pile 1011.
The guide post 1011 facilitates wireline installation guidance and the first landing shoulder 1012 is used to seat the low pressure wellhead.
Further, the low pressure wellhead 102 includes a weld end 1021 and a second landing shoulder 1022.
The weld end 1021 is used to hang up the conductor forming the foundation of the subsea wellhead and the second landing shoulder 1022 is used to seat the high pressure wellhead 103.
Further, the high-pressure wellhead 103 includes a setting ring 1031, a locking mechanism 1032 is disposed on the setting ring 1031, a third setting shoulder 1033 is disposed in the setting ring 1031, a first sealing surface 1034 is disposed on an inner wall of the third setting shoulder 1033, a first wellhead locking surface 1035 and a second wellhead locking surface 1036 are disposed on an inner wall of the third setting shoulder 1033 and on a top of the first sealing surface 1034, a first wellhead connecting thread 1037 is disposed on a top of an inner wall of the third setting shoulder 1033, and an annular side outlet 1038 for installing an annular valve is disposed on a surface of the third setting shoulder 1033.
The setting ring 1031 and locking mechanism 1032 are used to set and lock the low pressure wellhead 102, the third setting shoulder 1033 is used to hang the tubing hanger 3, the first sealing profile 1034 and wellhead first locking profile 1035 are used for locking of the annulus passage seal and seal assembly, the wellhead second locking profile 1036 is used for locking of the tubing hanger 3, the wellhead first connecting threads 1037 are used for connection with a mating take-off tool, the annulus side ports 1038 are provided with annulus valves for establishing circulation passages during completion and workover.
Further, the top and bottom of the inner wall of the casing hanger 104 are respectively provided with a wellhead second connecting thread 1041 and a wellhead third connecting thread 1046, and the surface of the casing hanger 104 is provided with an inclined end face 1042, a wellhead third locking profile 1043 and an overflow hole 1045 from top to bottom in sequence.
The wellhead second connecting threads 1041 are used for connection of a casing string retrieving tool, the inclined end surface 1042 is a setting end surface of the tubing hanger 3, the wellhead third locking profile 1043 and the flow-through hole 1045 are used for locking and sealing of the annular sealing assembly 105, the flow-through hole 1045 is used for returning cementing slurry, and the wellhead third connecting threads 1046 are used for connecting the casing.
Further, the annular seal assembly 105 includes a metal seal 1051 with a wellhead drive mechanism 1052 mounted thereto on top of the metal seal 1051.
The metal seal 1051 is a thin-wall special-shaped structure, the annular seal of the high-pressure wellhead 103 and the casing hanger 104 is realized through extrusion deformation, and the wellhead driving mechanism 1052 is pushed by a sending tool to ensure that the annular seal assembly 105 is locked on the locking molded surface of the high-pressure wellhead 103 and the casing hanger 104.
Further, the underwater christmas tree system 2 comprises a christmas tree main body 213, a christmas tree cap 203 is mounted on the top of the christmas tree main body 213, a production main valve 201, a paraffin removal valve 202 and a production wing valve 204 are mounted in the christmas tree main body 213 respectively, a bottom connector 206 is arranged at the bottom of the christmas tree main body 213, a frame 211 is connected to the surface of the bottom connector 206, and a base 210 is connected to the bottom of the frame 211.
The production master valve 201 is used for adjusting wellhead pressure and controlling the opening and closing states of other valves in the christmas tree system 2.
The de-waxing valve 202 controls the flow of the media by controlling the flow rate, regulating the pressure of the media within the system.
The tree cap 203 is used to prevent debris fall damage and marine growth inside the tree.
The production wing valve 204 is used for oil well forward and reverse circulation well flushing and oil jacket communication production.
The bottom connector 206 is used to enable connection of a subsea tree to a subsea wellhead.
The base 210 and the frame 211 are used for setting installation of the christmas tree, and the integral structure of the christmas tree is protected.
Further, a temperature and pressure sensor 205, a first manual operation valve 207, a second manual operation valve 208, and a third manual operation valve 209 are respectively installed on the tree body 213 in communication therewith.
The temperature and pressure sensor 205 is used to monitor the temperature and pressure of the injection flow path.
The first manually operated valve 207 is used to control the manually operated valve of the surface controlled subsurface safety valve SCSSV.
The second manually operated valve 208 is a manually operated valve for wellhead seal grommet testing.
The third manually operated valve 209 is used for sealing test of the inner tree cap 4.
Further, the tubing hanger 3 comprises a tubing hanger main body 305, a setting end face 301 is arranged at the bottom of the tubing hanger main body 305, a tubing connecting thread 302 is arranged at the bottom of the inner wall of the tubing hanger main body 305, a tubing locking molded surface 303 and a tubing driving mechanism 304 are respectively connected to the surface of the tubing hanger main body 305, and the bottom of the tubing driving mechanism 304 is inserted into the tubing locking molded surface 303 to excite the tubing locking molded surface 303.
The setting end face 301 is for setting on the casing hanger 104.
Tubing connection threads 302 are used to connect tubing strings.
The tubing locking profile 303 is used to lock the tubing hanger to the high pressure wellhead 103.
The tubing drive mechanism 304 is used to activate the locking mechanism.
Further, the inner tree cap 4 comprises a cap body 403, and a tree cap locking surface 401 and a tree cap sealing mechanism 402 are sleeved on the surface of the cap body 403.
The tree cap locking profile 401 is used to lock the inner tree cap 4.
The tree cap sealing mechanism 402 is a seal for the cap body 403.
Example 2
An operating program for a simplified subsea wellhead and tree system assembly for a shallow water injection well, comprising the steps of:
after the well is drilled, a guide pipe column with corresponding size is lowered, a tail guide pipe is connected to the low-pressure wellhead 102, a low-pressure wellhead 102 taking tool, the low-pressure wellhead 102 and the tail guide pipe are lowered in place, well cementation is carried out after the well is completed, the low-pressure wellhead 102 taking tool is recovered, a permanent guide base 101 is lowered, the permanent guide base is placed on the low-pressure wellhead 102, and after the bow direction is adjusted, the taking tool of the permanent guide base 101 is recovered.
Drilling a second borehole, putting down a casing string with a corresponding size after the second borehole is drilled, connecting a tail casing to the high-pressure wellhead head 103, taking a tool together with the high-pressure wellhead head 103 and the tail casing by the high-pressure wellhead head 103, sitting on the low-pressure wellhead head 102, and locking the high-pressure wellhead head 103; installing a side outlet gate valve, well cementing a sleeve after the side outlet gate valve is installed, and recycling the high-pressure wellhead 103 to take the tool; and installing a high-pressure vertical pipe with a corresponding size, wherein the top of the high-pressure vertical pipe is connected to the blowout preventer, and testing the pressure and sealing.
Three-hole drilling, namely flushing the bottom of a probe by a large-displacement flushing tool after the drilling, flushing, setting down a casing string with corresponding size, connecting a tail casing to a casing hanger 104, and setting a setting shoulder of a high-pressure wellhead head 103 by a casing hanger 104 taking-in tool together with the casing hanger 104 and the tail casing; casing cementing, unhooking and retrieving casing hanger 104 retrieval tools; the small displacement flushing tool flushes the top profile of the casing hanger 104, lowers the correspondingly sized annulus seal assembly 105, and presses the test seal. The well completion operation, perforation or sand prevention and the like, after the operation is finished, an oil pipe column is lowered, an oil pipe at the tail is connected to an oil pipe hanger, a sitting pipe column is used for sitting and placing an oil pipe hanger taking tool together with the oil pipe hanger and the oil pipe at the tail on an inclined end surface 1042, the oil pipe hanger is locked to a high-pressure wellhead 103 by pressing, the locking is checked by lifting, and the seal is checked by pressing; operating the steel wire, installing an oil pipe hanging blanking plug, and testing the pressure; the tubing string taking-off tool is taken off, and the sitting tubing string and the tubing string taking-off tool are recovered. The riser joint is released and the blowout preventer and high pressure riser are recovered. And (3) setting the christmas tree, connecting a control pipeline and a hot stab pipeline to the christmas tree, connecting a drill rod with a christmas tree setting tool and the christmas tree, slowly setting the christmas tree and sitting on the high-pressure wellhead head 103, and locking, over-lifting and pressing to test and seal. The wireline recovery tubing hanger plug closes the subsurface safety valve SCSSV, closing the production master valve 201 and the paraffin removal valve 202. Unlocking and recovering the tool for lowering the christmas tree, assisting a diver in installing the cap 4 in the christmas tree, and testing pressure and sealing. And installing a slag prevention cap, installing a christmas tree protection device, and injecting water by connecting a water injection pipeline.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A simplified subsea wellhead and tree system assembly for a shallow water injection well, comprising:
-a subsea wellhead system (1);
the underwater Christmas tree system (2), wherein the underwater Christmas tree system (2) is arranged inside the underwater wellhead system (1);
the oil pipe hanger (3) is arranged on the surface of the underwater Christmas tree system (2);
and the inner tree cap (4) is connected to the top of the underwater Christmas tree system (2).
2. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 1 wherein: the underwater wellhead system (1) comprises a permanent guide base (101), a low-pressure wellhead (102) is arranged inside the permanent guide base (101), a high-pressure wellhead (103) is arranged inside the low-pressure wellhead (102), a casing hanger (104) and an annular sealing assembly (105) are respectively arranged inside the high-pressure wellhead (103), and the annular sealing assembly (105) seals the joint of the high-pressure wellhead (103) and the casing hanger (104).
3. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 2 wherein: the permanent guide base (101) comprises four guide piles (1011), and a first setting shoulder (1012) is sleeved on the surface of each guide pile (1011).
4. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 2 wherein: the low pressure wellhead (102) includes a weld end (1021) and a second landing shoulder (1022).
5. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 2 wherein: the high-pressure wellhead head (103) comprises a setting ring (1031), a locking mechanism (1032) is arranged on the setting ring (1031), a third setting shoulder (1033) is arranged in the setting ring (1031), a first sealing surface (1034) is arranged on the inner wall of the third setting shoulder (1033), a wellhead first locking surface (1035) and a wellhead second locking surface (1036) are arranged on the inner wall of the third setting shoulder (1033) and positioned at the top of the first sealing surface (1034), a wellhead first connecting thread (1037) is arranged on the top of the inner wall of the third setting shoulder (1033), and an annulus side outlet hole (1038) for installing an annulus valve is formed in the surface of the third setting shoulder (1033).
6. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 2 wherein: wellhead second connecting threads (1041) and wellhead third connecting threads (1046) are respectively formed at the top and the bottom of the inner wall of the casing hanger (104), and an inclined end face (1042), a wellhead third locking molded surface (1043) and an overflow hole (1045) are sequentially formed on the surface of the casing hanger (104) from top to bottom.
7. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 2 wherein: the annular seal assembly (105) includes a metal seal (1051), with a wellhead drive mechanism (1052) mounted thereto on top of the metal seal (1051).
8. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 1 wherein: the underwater Christmas tree system (2) comprises a Christmas tree main body (213), a Christmas tree cap (203) is mounted at the top of the Christmas tree main body (213), a production main valve (201), a paraffin removal valve (202) and a production wing valve (204) are mounted in the Christmas tree main body (213) respectively, a bottom connector (206) is arranged at the bottom of the Christmas tree main body (213), a frame (211) is connected to the surface of the bottom connector (206), and a base (210) is connected to the bottom of the frame (211).
9. A simplified underwater wellhead and christmas tree system assembly for shallow water injection wells as claimed in claim 8 wherein: the Christmas tree main body (213) is respectively provided with a temperature and pressure sensor (205), a first manual operation valve (207), a second manual operation valve (208) and a third manual operation valve (209) which are communicated with the Christmas tree main body.
10. The simple underwater wellhead and christmas tree system device for shallow water injection wells according to claim 1, characterized in that the tubing hanger (3) comprises a tubing hanger main body (305), a setting end surface (301) is arranged at the bottom of the tubing hanger main body (305), a tubing connecting thread (302) is arranged at the bottom of the inner wall of the tubing hanger main body (305), a tubing locking profile (303) and a tubing driving mechanism (304) are respectively connected to the surface of the tubing hanger main body (305), and the bottom of the tubing driving mechanism (304) is inserted into the tubing locking profile (303) to excite the tubing locking profile;
the inner tree cap (4) comprises a cap body (403), and a tree cap locking molded surface (401) and a tree cap sealing mechanism (402) are sleeved on the surface of the cap body (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311654210.8A CN117536573A (en) | 2023-12-04 | 2023-12-04 | Simple underwater wellhead and christmas tree system device for shallow water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311654210.8A CN117536573A (en) | 2023-12-04 | 2023-12-04 | Simple underwater wellhead and christmas tree system device for shallow water injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117536573A true CN117536573A (en) | 2024-02-09 |
Family
ID=89793671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311654210.8A Pending CN117536573A (en) | 2023-12-04 | 2023-12-04 | Simple underwater wellhead and christmas tree system device for shallow water injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117536573A (en) |
-
2023
- 2023-12-04 CN CN202311654210.8A patent/CN117536573A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7121344B2 (en) | Plug installation system for deep water subsea wells | |
| EP2287439B1 (en) | Method of completing a well | |
| US6360822B1 (en) | Casing annulus monitoring apparatus and method | |
| US6142236A (en) | Method for drilling and completing a subsea well using small diameter riser | |
| US6988553B2 (en) | Horizontal spool tree wellhead system and method | |
| US3602303A (en) | Subsea wellhead completion systems | |
| US20070169940A1 (en) | Tubing hanger and wellhead housing with mating tubing annulus passages | |
| NO308672B2 (en) | Seabed wellhead assembly, and method for overhauling a seabed well. | |
| US6978839B2 (en) | Internal connection of tree to wellhead housing | |
| NO342400B1 (en) | Cap system for subsea equipment | |
| WO2008109280A1 (en) | Subsea adapter for connecting a riser to a subsea tree | |
| NO20191012A1 (en) | An apparatus for forming at least a part of a production system for a wellbore, and a line for and a method of performing an operation to set a cement plug in a wellbore | |
| WO2010042873A2 (en) | Integrated installation and workover controll system | |
| US11047211B2 (en) | Reverse circulation debris removal tool for setting isolation seal assembly | |
| NO344501B1 (en) | Multi-section valve tree completion system | |
| WO2014110444A2 (en) | Jetting tool | |
| WO2006061645A1 (en) | Plug installation and retrieval tool for subsea wells | |
| US3062288A (en) | Underwater dual tubing well completion | |
| US3279536A (en) | Submarine drilling and production head and method of installing same | |
| CN117536573A (en) | Simple underwater wellhead and christmas tree system device for shallow water injection well | |
| EP2964873B1 (en) | Wireline assisted coiled tubing portion and method for operation of such a coiled tubing portion | |
| CN115848883A (en) | Saline water layer carbon dioxide geological sealing test well forming structure and process | |
| GB2588029A (en) | Annular controlled safety valve system and method | |
| WO2018143825A1 (en) | An apparatus for forming at least a part of a production system for a wellbore, and a line for an a method of performing an operation to set a cement plug in a wellbore | |
| NO20230145A1 (en) | System and method for full bore tubing head spool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |