CN113090216B - Blowout prevention throwing and fishing structure and method for underwater Christmas tree - Google Patents
Blowout prevention throwing and fishing structure and method for underwater Christmas tree Download PDFInfo
- Publication number
- CN113090216B CN113090216B CN202110287098.3A CN202110287098A CN113090216B CN 113090216 B CN113090216 B CN 113090216B CN 202110287098 A CN202110287098 A CN 202110287098A CN 113090216 B CN113090216 B CN 113090216B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- blowout preventer
- pressure
- plug
- blowout
- 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.)
- Active
Links
- 241000191291 Abies alba Species 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000002265 prevention Effects 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 238000007689 inspection Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
-
- 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
- E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads
-
- 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
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/064—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers specially adapted for underwater well heads
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses a blowout prevention throwing and fishing structure of an underwater Christmas tree, which comprises the Christmas tree which is arranged under water and is provided with an underwater oil outlet, and a tubing hanger, wherein the lower part of the tubing hanger is hung with an oil tube, the upper part of the tubing hanger is connected with a channel, the top of the channel is provided with an oil production tree cap, the joint of the oil production tree cap and the channel is provided with a first plug which is detachably connected with the oil production tree cap, the lower part of the oil production tree cap plug is provided with a first plug which is positioned in the channel, and the joint of the lower part of the tubing hanger and the oil tube is provided with a second plug which is positioned in the oil tube; and after the Christmas tree cap and the first plug are taken down, the Christmas tree can be connected with an external pipeline, the bottom of the pipeline is connected with the tubing hanger through the inner pipe wall of the channel, the middle part of the pipeline is provided with a blowout preventer, the pipeline is positioned above the Christmas tree, and the top of the pipeline is provided with a pipe cap. The traditional mode is broken through, the existing blowout preventer is used as a switch for preventing blowout, well killing fluid is omitted in the whole process, and the phenomenon that if the pressure of a fluid column is too high, well killing fluid loss and pollution are caused is avoided; too small a well blowout cannot be controlled.
Description
Technical Field
The invention belongs to the field of petroleum equipment manufacturing industry, and relates to an anti-blowout dropping and fishing structure of an underwater Christmas tree.
Background
Subsea wellhead assemblies are commonly used to produce hydrocarbons extracted from subterranean formations below the seafloor. Subsea wellhead assemblies generally include a wellhead housing disposed at a wellbore opening, wherein the wellbore extends through one or more hydrocarbon producing formations. Casing and tubing hangers are positioned within the casing to support the casing and production tubing inserted into the wellbore. The casing lines the wellbore (or lines the wellbore) to isolate the wellbore from the surrounding rock formation. The conduit is typically concentrically located within the casing and provides a conduit for the production of hydrocarbons that are attached within the formation. The wellhead assembly also typically includes a subsea tree connected to an upper end of the wellhead housing. Subsea trees control and distribute fluids produced from a wellbore.
Subsea trees are installed on the wellhead housing, pipeline head, or pipeline hanger cross-over (spool) by latching the tool down within the tree main mandrel or to the external profile and attaching a wireline or drill pipe to the tool in order to lower the subsea tree to the wellhead housing.
During workover, the workover tools and devices are lowered from the christmas tree mouth, and during this process, a kill fluid is injected to prevent blowout, and the kill fluid is the fluid pumped into the well to prevent blowout during workover and kill operations. When performing workover and killing operations on oil wells and gas wells, the density of the liquid pumped into the wells is selected according to the reservoir pressure and depth in order to prevent blowout. If the pressure of the liquid column is too high, the well killing liquid loss and pollution can be caused; too small a hole may not control the blowout.
Disclosure of Invention
The invention aims to: the utility model provides a structure is dragged for in preventing spouting of subsea tree, does not use the kill fluid, has solved the volume of above-mentioned problem not enough.
The technical scheme adopted by the invention is as follows:
an anti-spraying throwing and fishing structure of an underwater Christmas tree comprises the Christmas tree which is arranged under water and is provided with an underwater oil outlet, and comprises a tubing hanger, wherein the lower part of the tubing hanger is hung with an oil pipe, the upper part of the tubing hanger is connected with a channel, the top of the channel is provided with an oil production tree cap, the joint of the oil production tree cap and the channel is provided with a first plug which is detachably connected with the oil production tree cap, the lower part of the oil production tree cap plug is provided with a second plug which is positioned in the oil pipe, and the joint of the lower part of the tubing hanger and the oil pipe is provided with a first plug which is positioned in the channel;
and after the cap of the Christmas tree and the first plug are taken down, the pipe which can be externally connected with the Christmas tree is connected with the tubing hanger through the inner pipe wall of the channel at the bottom of the pipe, the blowout preventer is arranged in the middle of the pipe, the pipe cap is arranged above the Christmas tree, and the pipe cap is arranged at the top of the pipe cap.
Further, the oil outlet includes, but is not limited to, 1.
Further, the oil outlet is located below the second plug.
A blowout prevention dropping and fishing method of an underwater Christmas tree comprises the following steps,
s1: firstly, taking out the oil production tree cap plug at the top of the oil production tree, and then taking out the first plug;
s2: closing a blowout preventer in the middle of the blowout preventer and a pipe cap at the top inlet, connecting the bottom of the pipeline with a tubing hanger through the inner pipe wall of the channel, and performing pressure check on the pipeline below the blowout preventer through a pressing test tool; when the pressure inspection is qualified, entering S3; when the pressure inspection is unqualified, reinstalling the pipeline and the tubing hanger and then carrying out pressure detection;
s3: opening the pipe cover, and throwing and fishing tools from the inlet at the top of the pipe and positioning in the pipe above the blowout preventer; closing the pipe cover, performing pressure inspection on the pipeline above the blowout preventer, and entering S4 when the pressure inspection is qualified; when the pressure check is unqualified, the pipe cover is closed again and then the pressure detection is carried out;
s4: opening the blowout preventer, moving a second plug below the tubing hanger into the pipeline above the blowout preventer through the throwing and fishing tool, closing the blowout preventer, opening the pipe cover and taking out the second plug;
s5: and repeating the step S3, and opening the blowout preventer to start the throwing and fishing operation when the pressure is checked to be qualified.
Further, the method also comprises the step S6: and (3) detecting the pressure in the well through the pressure detection tool and setting a threshold value while running and fishing, and closing the blowout preventer when the pressure exceeds the threshold value.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the blowout preventer breaks through the traditional mode, utilizes the existing blowout preventer as a switch for preventing blowout, cancels the well killing fluid in the whole process, and avoids the well killing fluid loss and pollution caused by overlarge fluid column pressure; too small a control of the blowout is not possible.
2. Through improving traditional solid production tree cap and setting up detachable production tree cap end cap for the top, and match with passageway junction top shape, form the apron of passageway, in order to further guarantee the leakproofness of production tree cap and passageway top junction, increased first end cap as the sealing member.
3. During well repair, by embedding the pipeline in the channel; and the stability of the entire mounting structure is determined by a plurality of pressure checks at the time of mounting.
4. The blowout preventer is higher than the Christmas tree body, namely, the blowout preventer is used as a whole pipeline valve and is higher than the Christmas tree body, and workers can control the blowout preventer to be closed or opened conveniently from the aspect of operation space.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:
FIG. 1 is a schematic representation of the operation of the subsea tree of the present invention without workover;
FIG. 2 is a schematic view illustrating the operation of the second plug not being removed during the workover of the subsea tree of the present invention;
FIG. 3 is a schematic view of the second plug being removed during workover of the subsea tree of the present invention.
The labels in the figure are: 1-Christmas tree, 2-oil pipe, 3-first plug, 4-tubing hanger, 5-second plug, 6-pipeline, 7-blowout preventer, 8-pipe cap, 9-oil production tree cap, 10-oil outlet and 11-channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, not by way of limitation, i.e., the embodiments described are intended as a selection of the best mode contemplated for carrying out the invention, not as a full mode. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Example one
An anti-spraying throwing and fishing structure of an underwater Christmas tree comprises a Christmas tree 1 which is arranged underwater and is provided with an underwater oil outlet 10, and comprises a tubing hanger 4, wherein an oil tube 2 is hung on the lower part of the tubing hanger 4, the upper part of the tubing hanger is connected with a channel 11, an oil production tree cap 9 is arranged on the top of the channel 11, a first plug 3 which is detachably connected with the oil production tree cap is arranged at the joint of the oil production tree cap 9 and the channel 11, the first plug 3 which is positioned in the channel 11 is arranged below the oil production tree cap plug, and a second plug 5 which is positioned in the oil tube 2 is arranged at the joint of the lower part of the tubing hanger 4 and the oil tube 2;
after the cap 9 of the Christmas tree and the first plug 3 are taken down, the pipe 6 which can be externally connected with the Christmas tree 1 is arranged at the bottom of the pipe 6, the inner pipe wall of the pipe 6 is connected with the tubing hanger 4 through the channel 11, the middle part of the pipe is provided with the blowout preventer 7, the pipe cap 8 is arranged above the Christmas tree 1, and the top of the pipe cap is provided with the pipe cap 8.
In the specific operation: during well workover, taking out the components in the well and then performing fishing operation, firstly taking out the cap plug of the cap of the oil production tree at the top of the oil production tree, and then taking out the first plug; closing a blowout preventer in the middle of the pipeline and a pipe cap at the inlet of the top of the pipeline, connecting the bottom of the pipeline with the oil pipe hanger through the inner pipe wall of the channel, and carrying out pressure check on the pipeline below the blowout preventer through a pressing test tool; when the pressure inspection is qualified, entering S3; when the pressure check is unqualified, reinstalling the pipeline and the oil pipe hanger and then carrying out pressure detection; opening the pipe cover, and throwing and fishing the tool from the inlet at the top of the pipeline and in the pipeline above the blowout preventer; closing the pipe cover, performing pressure inspection on the pipeline above the blowout preventer, and entering S4 when the pressure inspection is qualified; when the pressure check is unqualified, the pipe cover is closed again and then the pressure detection is carried out; and opening the blowout preventer, moving the second plug below the tubing hanger into the pipeline above the blowout preventer through the throwing and fishing tool, closing the blowout preventer, opening the pipe cover and taking out the second plug.
Example two
A blowout prevention dropping and fishing method of an underwater Christmas tree specifically comprises the following steps,
s1: firstly, taking out the oil production tree cap plug at the top of the oil production tree 1, and then taking out the first plug 3;
s2: closing the blowout preventer 7 in the middle of the pipe and the pipe cap 8 at the top inlet, connecting the bottom of the pipe 6 with the tubing hanger 4 through the inner pipe wall of the channel 11, and performing pressure check on the pipe 6 below the blowout preventer 7 through a pressure test tool; when the pressure inspection is qualified, entering S3; when the pressure check is unqualified, the pipeline 6 and the oil pipe hanger 4 are reinstalled, and then the pressure detection is carried out;
s3: opening the pipe cover 8, and throwing and fishing tools from the top of the pipe 6 and locating in the pipe 6 above the blowout preventer 7; closing the pipe cover 8, performing pressure inspection on the pipeline 6 above the blowout preventer 7, and entering S4 when the pressure inspection is qualified; when the pressure check is unqualified, the pipe cover 8 is closed again for pressure detection;
s4: opening the blowout preventer 7, moving the second plug 5 below the tubing hanger 4 into the pipeline 6 above the blowout preventer 7 through a throwing and fishing tool, closing the blowout preventer 7, opening the pipe cap 8 and taking out the second plug 5;
s5: and S3, repeating, and opening the blowout preventer 7 to start the throwing and fishing operation when the pressure is qualified. The pipe cover 8 and the blowout preventer 7 need to be subjected to pressure detection after being opened every time, so that the safety of the whole operation process is ensured.
S6: and (3) detecting the pressure in the well through the pressure detection tool and setting a threshold value while running and fishing, and closing the blowout preventer 7 when the pressure exceeds the threshold value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents and improvements made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (2)
1. A blowout prevention dropping and fishing method of an underwater Christmas tree is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1: firstly, taking out the oil production tree cap plug at the top of the oil production tree (1), and then taking out the first plug (3);
s2: closing a blowout preventer (7) positioned in the middle of the pipeline and a pipe cover (8) positioned at the inlet of the top of the pipeline, connecting the bottom of the pipeline (6) with the tubing hanger (4) through the inner pipe wall of a channel (11), and carrying out pressure check on the pipeline (6) positioned below the blowout preventer (7) through a pressure test tool; when the pressure inspection is qualified, entering S3; when the pressure inspection is unqualified, the pipeline (6) and the oil pipe hanger (4) are reinstalled, and then pressure detection is carried out;
s3: opening the pipe cover (8), and throwing and fishing the tool from the top of the pipeline (6) and locating in the pipeline (6) above the blowout preventer (7); closing the pipe cover (8), performing pressure inspection on the pipeline (6) above the blowout preventer (7), and entering S4 when the pressure inspection is qualified; when the pressure check is unqualified, the pipe cover (8) is closed again for pressure detection;
s4: opening a blowout preventer (7), moving a second plug (5) below the tubing hanger (4) into a pipeline (6) above the blowout preventer (7) through a throwing and fishing tool, closing the blowout preventer (7), opening a tube cover (8) and taking out the second plug (5);
s5: and S3, repeating, and opening the blowout preventer (7) to start the throwing and fishing operation when the pressure is checked to be qualified.
2. The blowout prevention dropping and fishing method for the subsea tree according to claim 1, wherein: further comprising S6: when the throwing and fishing operation is carried out, the pressure in the well is detected through the pressure detection tool, a threshold value is set, and when the pressure exceeds the threshold value, the blowout preventer (7) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287098.3A CN113090216B (en) | 2021-03-17 | 2021-03-17 | Blowout prevention throwing and fishing structure and method for underwater Christmas tree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287098.3A CN113090216B (en) | 2021-03-17 | 2021-03-17 | Blowout prevention throwing and fishing structure and method for underwater Christmas tree |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113090216A CN113090216A (en) | 2021-07-09 |
| CN113090216B true CN113090216B (en) | 2022-10-21 |
Family
ID=76669236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110287098.3A Active CN113090216B (en) | 2021-03-17 | 2021-03-17 | Blowout prevention throwing and fishing structure and method for underwater Christmas tree |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113090216B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420037A (en) * | 2017-08-02 | 2017-12-01 | 贵州理工学院 | A kind of descending deep hole protrusion-dispelling drilling construction method of high inclination-angle |
| CN207212303U (en) * | 2017-04-11 | 2018-04-10 | 乐山市山鹰模具有限责任公司 | A kind of efficient sealed preventer for oil field gas production |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7410003B2 (en) * | 2005-11-18 | 2008-08-12 | Bj Services Company | Dual purpose blow out preventer |
| US8347983B2 (en) * | 2009-07-31 | 2013-01-08 | Weatherford/Lamb, Inc. | Drilling with a high pressure rotating control device |
| CN201851064U (en) * | 2010-08-09 | 2011-06-01 | 宝鸡石油机械有限责任公司 | Ocean underwater horizontal Christmas tree for oil pipe suspender with double wire rope plugs |
| CN103089199A (en) * | 2011-11-03 | 2013-05-08 | 大港油田集团有限责任公司 | Depleted oil-gas reservoir underground gas storage injection-production string and operating method thereof |
| CN204041064U (en) * | 2014-08-04 | 2014-12-24 | 欧如学 | The device of a kind of blowout hookup of oil well sealing pressure testing |
| CN105064940B (en) * | 2015-08-21 | 2017-11-24 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of built-in coiled tubing completion tubular column and construction method |
| CN109113633A (en) * | 2017-06-22 | 2019-01-01 | 陕西星辰石油科技有限责任公司 | A kind of oil field multistage blowout control equipment |
| CN111472757A (en) * | 2019-01-22 | 2020-07-31 | 中国石油天然气股份有限公司 | Test method and test system for ultra-deep ultra-high temperature and high pressure gas well |
| CN210919028U (en) * | 2019-10-30 | 2020-07-03 | 中国石油集团渤海钻探工程有限公司 | Pressure testing device of blowout preventer full-sealing flashboard |
-
2021
- 2021-03-17 CN CN202110287098.3A patent/CN113090216B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207212303U (en) * | 2017-04-11 | 2018-04-10 | 乐山市山鹰模具有限责任公司 | A kind of efficient sealed preventer for oil field gas production |
| CN107420037A (en) * | 2017-08-02 | 2017-12-01 | 贵州理工学院 | A kind of descending deep hole protrusion-dispelling drilling construction method of high inclination-angle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113090216A (en) | 2021-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2102446B1 (en) | Wellhead assembly and method for an injection tubing string | |
| US6142236A (en) | Method for drilling and completing a subsea well using small diameter riser | |
| US8689879B2 (en) | Fluid displacement methods and apparatus for hydrocarbons in subsea production tubing | |
| US6640902B2 (en) | Nested stack-down casing hanger system for subsea wellheads | |
| US8579032B2 (en) | Casing annulus management | |
| US6705401B2 (en) | Ported subsea wellhead | |
| US20030121667A1 (en) | Casing hanger annulus monitoring system | |
| CN103089199A (en) | Depleted oil-gas reservoir underground gas storage injection-production string and operating method thereof | |
| CA2552072A1 (en) | Packer cups | |
| US9874065B2 (en) | Dual stripper apparatus | |
| US11111764B2 (en) | Wellbore annular safety valve and method | |
| 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 | |
| US6871708B2 (en) | Cuttings injection and annulus remediation systems for wellheads | |
| GB2311312A (en) | Well system | |
| WO1999004137A1 (en) | Simultaneous production and water injection well system | |
| CA1129335A (en) | Reservoir fluid sampling | |
| US5133407A (en) | Fluid injection and production apparatus and method | |
| CN205858311U (en) | A kind of bore hole staged fracturing completion tubular column | |
| CN113090216B (en) | Blowout prevention throwing and fishing structure and method for underwater Christmas tree | |
| CN106761690B (en) | Intelligent test well for gas lift process simulation | |
| US20050241821A1 (en) | System and method for well workover with horizontal tree | |
| US20070062693A1 (en) | System, method, and apparatus for degassing tool for coal bed methane gas wells | |
| US3242991A (en) | Underwater wellhead with re-entry lubricator | |
| US9234402B2 (en) | Method for modifying an existing subsea arranged oil production well, and a thus modified oil production well | |
| 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 |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |