CN209293753U - Subsea production tree tubing hanger cleaning means - Google Patents
Subsea production tree tubing hanger cleaning means Download PDFInfo
- Publication number
- CN209293753U CN209293753U CN201821892428.1U CN201821892428U CN209293753U CN 209293753 U CN209293753 U CN 209293753U CN 201821892428 U CN201821892428 U CN 201821892428U CN 209293753 U CN209293753 U CN 209293753U
- Authority
- CN
- China
- Prior art keywords
- operating stick
- tubing hanger
- sewage
- high pressure
- production tree
- 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.)
- Withdrawn - After Issue
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000010865 sewage Substances 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000005406 washing Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000013535 sea water Substances 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 244000147058 Derris elliptica Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Abstract
The utility model discloses a kind of subsea production tree tubing hanger cleaning means, which includes driving assembly, inner wall washing brush head, high-pressure sprayer, sewage collector and sewage drainage pipe；Driving assembly includes the power device of operating stick and attended operation bar, and high-pressure sprayer includes high pressure water jet pipe and the driving device that sprays water with high pressure.Moving up and down or rotating for operating stick is driven by power device, the inner wall washing brush head for being placed on operating stick bottom sidewall is driven to move up and down or rotate, inner wall is hung with cleaning tubing, and combine the high pressure water jet pipe for being placed in operating stick and protruding from operating stick bottom, dirt on spraying-rinsing tubing hanger inner wall, using the sewage collector retention dirty water or dirt being connect with tubing hanger bottom, while dirty water or dirt being taken away by sewage drainage pipe.The cleaning means of the utility model realizes the operation mode of live well head underwater cleaning tubing hanger, it is ensured that foul will not fall into well, cause secondary pollution and surrounding seawater environmental pollution.
Description
Technical field
The utility model relates to cleaning equipment technical fields, and in particular to a kind of subsea production tree tubing hanger cleaning means.
Background technique
With the petroleum exhaustive exploitation of land, the exhausted impetus is now had already appeared, the exploitation of oil gas at present is from land
It is transferred to seabed on the ground, since christmas equipment works in seabed for a long time, seabed operating condition, seawater etc. have christmas apparatus
Very strong corrosivity effect, therefore very high requirement is proposed to the equipment and materials of oil recovery (gas), it is non-to also result in equipment price
Chang Anggui, in order to save production cost, it is necessary to which we often carry out maintenance to undersea device.Since equipment is in seabed
Work, maintenance is got up also more difficult and troublesome.This just needs one kind to be simple and convenient to operate efficiently tool.
Production tree is the wellhead assembly that flowing well and machine-pumped oil well etc. are used to exploit petroleum.It is the control of oil/gas well topmost
It is to connect the life from underground positioned at the component led at oil well top end opening with the capital equipment for adjusting production of hydrocarbons
Produce pipeline and flowline, while the important barrier as oil well top and external environs.Tubing hanger is that tubing string in well is hanged
The tool of the four-way junction of casing of production tree is hung over, sealing can be played the role of and divides the annular space of oil pipe and casing.Oil pipe
Extension is the indispensable important component of oil gas water well.Conventional cleaning methods are that tubing hanger is set from wellhead oil tree in water
It is standby above to remove, the stop work and production a few days is needed, tubing hanger is dismantled, and returns to ground or platform individually cleaning.Exploitation one
Kind will reduce the cost of production without the cleaning way dismantled to tubing hanger.
Utility model content
The purpose of this utility model is to replace traditional underwater well head production tree tubing hanger cleaning operation mode, provides one kind
Simply, convenient, fast, to live wellhead oil tree tubing hanger carry out maintenance cleaning means, can avoid it is complicated, cumbersome,
High-intensitive field operation mode.
In order to achieve the above object, the utility model provides a kind of subsea production tree tubing hanger cleaning means, tubing hanger
It is installed in production tree, the bottom of tubing hanger is equipped with the pipe hanger screw thread for connecting with oil pipe.The cleaning means includes to drive
Dynamic component, inner wall washing brush head, high-pressure sprayer, sewage collector and sewage drainage pipe, the driving assembly include behaviour
Make the power device of bar and attended operation bar.The operating stick is hollow pipeline, is passed down through production tree from the water surface and extend into
In tubing hanger, the operating stick and production tree are sealed.Power device can drive operating stick to move down along operating stick length direction
It moves or is rotated by axle center of operating stick.The inner wall washing brush head is placed on around the bottom sidewall of the operating stick, inner wall
Cleanninfg brushes outer diameter is greater than the internal diameter of the tubing hanger, and operating stick drives inner wall washing brush head above and below operating stick length direction
Movement is rotated by axle center of operating stick.The high-pressure sprayer includes to spray water with high pressure driving device and several to spray water with high pressure
Pipe；High pressure water jet pipe is placed in the operating stick；The upper end of high pressure water jet pipe from operating stick stretching after with high pressure spray water drive
Dynamic device connection, the lower end of high pressure water jet pipe are stretched out from operating stick bottom, and high pressure water jet pipe lower end tube wall is equipped with several hole for water sprayings.
The sewage collector is connect with the bottom of the tubing hanger, makes the sealed bottom of the tubing hanger.The sewage drainage
Pipe sleeve is placed in the operating stick, and the upper end of sewage drainage pipe is connected from after operating stick stretching with suction pump, sewage drainage pipe
Lower end extend out to from operating stick in the sewage collector.
Preferably, the power device, it is described spray water with high pressure driving device and the suction pump be set to it is marine flat
Platform.
Preferably, the inner wall washing brush head is columnar flexible steel wire brush, it will not be to tubing hanger during scrub
Inner wall damage.
Preferably, the sewage collector is connect with the bottom thread of the tubing hanger.
Preferably, the sewage collector side wall be equipped with match with the pipe hanger screw thread of the tubing hanger bottom it is outer
Screw thread.
Preferably, the sewage collector inner wall is equipped with the internal screw thread for mounting and dismounting the sewage collector
Or groove.
Preferably, the tubing hanger upper end be shorted is threadedly coupled, the operating stick pass through be shorted protrude into described in
In tubing hanger, between the operating stick and short circuit be equipped with nonmetallic sealing ring, nonmetallic sealing ring can be used to Sealing with
Gap between operating stick plays certain fixation and buffer function to operating stick, prevents operating stick in short circuit or tubing hanger
The friction of wall.
The utility model has the following beneficial effects:
(1) production tree tubing hanger cleaning way provided by the utility model realizes the underwater cleaning oil pipe of live well head
The operation mode of extension；
(2) manner of cleaning up is simple, convenient, quick, and cleaning effect is good；
(3) cleaning solution or greasy dirt are retained and be discharged by sewage drainage pipe by sewage collectors, guarantee that foul will not fall into well
It is interior, cause secondary pollution and surrounding seawater environmental pollution.
Detailed description of the invention
Fig. 1 is the subsea production tree tubing hanger cleaning means structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of the sewage collector of the utility model.
Specific embodiment
The technical solution of the utility model is described further below in conjunction with drawings and examples.
The cleaning means of the utility model includes driving assembly, inner wall washing brush head, high-pressure sprayer, sewage collector
And sewage drainage pipe.The driving assembly includes the power device of operating stick and attended operation bar；The dress that sprays water with high pressure
It sets comprising spray water with high pressure driving device and high pressure water jet pipe.The power device, spray water with high pressure driving device and the institute
The suction pump stated is set to offshore platform.
As shown in Figure 1, cleaning means moving up and down or rotate by operating stick 6, drive are nested in 6 bottom side of operating stick
Inner wall washing brush head 2 around wall is moved up and down or is rotated, and hangs 7 inner walls with cleaning tubing, and combine high pressure water jet pipe 1, water spray
Cleaning tubing hangs the dirt on 7 inner walls, retains dirt using the sewage collector 3 connecting with 7 bottom of tubing hanger, passes through simultaneously
Sewage drainage pipe 4 takes dirt or dirty water away.
Operating stick 6 is hollow pipeline, is passed down through production tree from the water surface and short circuit 5 is extend into tubing hanger 7, with oil recovery
Tree sealing, pours in avoid seawater；It is equipped with nonmetallic sealing ring 9 between control stick 6 and short circuit 5, can be used to Sealing 5 and behaviour
Make the gap between bar 6, certain fixation and buffer function are played to operating stick 6, prevents 6 pairs of operating stick to be shorted 5 or tubing hanger 7
The friction of inner wall.Operating stick 6 is driven by the power device 8 for being mounted on offshore platform, and power device 8 has chuck, and chuck blocks
The side wall of operating stick 6, driving operating stick 6 move up and down along its length or with operating stick 6 for axle center rotation.
Preferably, the material of operating stick 6 is metal.
In some embodiments, nonmetallic sealing ring 9 is " O " type rubber ring.
Inner wall washing brush head 2 is placed on around the bottom sidewall of operating stick 6, and outer diameter is greater than the internal diameter of tubing hanger 7, is grasped
Make bar 6 to drive and move up and down along 6 length direction of operating stick or with operating stick 6 for axle center rotation, to realize in tubing hanger 7
The scrub of wall.
In some embodiments, inner wall washing brush head 2 is columnar flexible steel wire brush, will not be to tubing hanger 7 in cleaning
Inner wall damages.
High pressure water jet pipe 1 is placed in operating stick 6, high pressure spray of the upper end from after the stretching of operating stick 6 and set on offshore platform
The connection of water-driven device, lower end are stretched out from 6 bottom of operating stick.1 lower end of high pressure water jet pipe is equipped with multiple hole for water sprayings, water flow flushing oil
Dirt on pipe hanger inner wall is removed the greasy dirt, silt, wax to get off and is retained by sewage collector 3, is taken out by sewage drainage pipe 4
It walks, artificially foul will not be caused to fall into well, pollute or oil pipe blocking.High pressure water jet pipe 1 is set as one or more.
Preferably, 2 high pressure water jet pipes 1 are set.
In some embodiments, the water that high pressure water jet pipe 1 sprays contains the cleaning solution of special cleaning greasy dirt.
In some embodiments, sewage collector 3 is to be threadedly coupled with 7 bottom of tubing hanger.The pipe hanger screw thread of 7 bottom of tubing hanger
71 is very long, although 71 lower end of pipe hanger screw thread is connected with oil pipe, still there are enough positions and sewage collecting in 71 upper end of pipe hanger screw thread
Device 3 connects.
For the structure of sewage collector 3 as shown in Fig. 2, the top of sewage collector 3 is drum, lower part is that diameter is less than top
Cylinder, cylinder side wall is equipped with the external screw thread 33 to match with the pipe hanger screw thread 71 of 7 bottom of tubing hanger.3 inner wall of sewage collector
It is equipped with the internal screw thread 31 or groove 32 for mounting and dismounting sewage collector 3.When sewage collector 3 is installed, it can be used special
Tool is threadedly coupled by the internal screw thread 31 on 3 inner wall of sewage collector with sewage collector 3, or is caught in sewage collecting
Groove 32 on 3 inner wall of device moves into sewage collector 3 in tubing hanger 7 from production tree top, and the pipe with 7 bottom of tubing hanger
Screw thread 71 is hung to connect.The hand of spiral phase of internal screw thread 31 and the pipe hanger screw thread 71 of 7 bottom of tubing hanger on 3 inner wall of sewage collector
Instead, during dedicated tool screws sewage collector 3 and tubing hanger 7, itself is gradually unscrewed with sewage collector 3, most
It is detached from sewage collector 3 afterwards.When needing to dismantle sewage collector 3, the rotation of sewage collector 3 is removed toward opposite direction when installation.
It can also be used other specific purpose tool to be caught in the groove 32 on 3 inner wall of sewage collector, sewage collector 3 and tubing hanger 7 revolved
Tight or disassembly.Groove 32 on 3 inner wall of sewage collector is inverted T shaped.
In some embodiments, sewage collector 3 is the hollow cylinder without upper surface, and side wall is equipped with and 7 bottom of tubing hanger
The external screw thread that matches of pipe hanger screw thread 71.
Sewage drainage pipe 4 is placed in operating stick 6, suction pump of the upper end from after the stretching of operating stick 6 and set on offshore platform
It is connected, lower end is extend out in sewage collector 3 from operating stick 6, and cleaning solution and greasy dirt are discharged, guarantee that foul will not fall into well
It is interior, cause secondary pollution and surrounding seawater environmental pollution.
When tubing hanger 7 needs to clean, the pressure under shaft bottom is closed by storm valve, and wellhead oil tree equipment is in
Off working state, the inside do not have pressure.Tree cap on production tree is removed.The subsea production tree tubing hanger of the utility model
Cleaning means is by following sequence into installation:
(1) sewage collector 3 is connected with 7 lower thread of tubing hanger by dedicated fetching tool；
(2) male thread being shorted on 5 is connect with the box thread of 7 upper end of tubing hanger；
(3) inner wall washing brush head 2 is placed on 6 bottom sidewall of operating stick；
(4) operating stick 6 is connect with power device 8, tripping in tubing hanger 7；
(5) high pressure water jet pipe 1 passes through operating stick 6 and protrudes into tubing hanger 7, and lower end protrudes from operating stick 6；
(6) sewage drainage pipe 4 passes through operating stick 6 and protrudes into sewage collector 3.
Embodiment 1
Storm valve is closed, and removes the tree cap on production tree, dedicated pick-and-place tool tip is caught in sewage collector
Inverted T shaped groove, sewage collector is installed to tubing hanger bottom.The pipe hanger screw thread of tubing hanger bottom is very long, pipe hanger threaded lower end
It is connected with oil pipe, the upper end of pipe hanger screw thread is connect with sewage collector.
Male thread on short circuit is connect with the box thread of tubing hanger upper end.Operating stick is metal material, and upper end is at sea put down
Platform is embraced by the chuck of power drive unit, and operating stick passes through connecting flange, and then operating stick and connecting flange are together from sea
Platform is gradually lowered at production tree, and connecting flange lower end connect (place that tree cap removes) with production tree and realizes quiet close
Envelope, connecting flange upper end and operating stick realize that dynamic sealing, operating stick can continue tripping in and pass through to be shorted to protrude into tubing hanger.Behaviour
Make bar bottom sidewall and is equipped with inner wall washing brush head.Inner wall washing brush head is columnar flexible steel wire brush, and outer diameter is greater than oil pipe
Hang the diameter of inner wall.It is equipped with " O " type rubber ring between operating stick and short circuit, prevents operating stick and short circuit or tubing hanger inner wall from generating
Friction, still " O " type rubber ring will not tension, and operating stick pass through be shorted when, soft inner wall washing brush head is extruded, and is made
Operating stick can protrude into tubing hanger.
The high pressure water jet pipe lower end of high-pressure sprayer is stretched out from operating stick.The sewage drainage Guan Conghai being connected with water pumper
Upper mounting plate passes through operating stick and protrudes into production tree, and seawater is taken away.Power device starts that operating stick is driven to revolve from top to bottom at this time
Turn, drive inner wall washing brush head rotary-cleaning tubing hanger inner wall, multiple hole for water sprayings of high pressure water jet pipe contain to all directions ejection
There is the water flow of cleaning solution, rinses tubing hanger inner wall.
Sewage drainage pipe takes the sewage that sewage collector retains or dirt away.Operating stick moves up and down repeatedly, by oil pipe
It is clean to hang inner wall washing.When disassembly, after other devices are removed, dedicated pick-and-place tool card enters in the inverted T shaped groove of sewage collector,
Sewage collector rotation is removed.
In conclusion the subsea production tree tubing hanger cleaning means of the utility model realizes the underwater cleaning of live well head
The operation mode of tubing hanger；Manner of cleaning up is simple, convenient, quick, and cleaning effect is good；Cleaning solution or greasy dirt are received by sewage
Storage is retained and is discharged by sewage drainage pipe, it is ensured that foul will not fall into well, cause secondary pollution and surrounding seawater environment
Pollution.
It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended
Claim limit.
Claims (7)
1. a kind of subsea production tree tubing hanger cleaning means, tubing hanger are installed in production tree, the bottom of tubing hanger, which is equipped with, to be used for
The pipe hanger screw thread being connect with oil pipe, it is characterised in that:
The cleaning means includes driving assembly, inner wall washing brush head, high-pressure sprayer, sewage collector and sewage drainage
Pipe；
The driving assembly includes the power device of operating stick and attended operation bar；The operating stick is hollow pipeline, from
The water surface is passed down through production tree and extend into tubing hanger, and the operating stick and production tree seal；Power device can drive operation
Bar is moved up and down along operating stick length direction or is rotated by axle center of operating stick；
The inner wall washing brush head is placed on around the bottom sidewall of the operating stick, and inner wall washing brush head outer diameter is greater than described
Tubing hanger internal diameter, operating stick drive inner wall washing brush head moved up and down along operating stick length direction or using operating stick as axle center
Rotation；
The high-pressure sprayer includes spray water with high pressure driving device and several high pressure water jet pipes；High pressure water jet pipe is placed on institute
In the operating stick stated；The upper end of high pressure water jet pipe is connect from after operating stick stretching with the driving device that sprays water with high pressure, high pressure water jet pipe
Lower end from operating stick bottom stretch out, high pressure water jet pipe lower end tube wall be equipped with several hole for water sprayings；
The sewage collector is connect with the bottom of the tubing hanger, makes the sealed bottom of the tubing hanger；
The sewage drainage pipe sleeve is placed in the operating stick, the upper end of sewage drainage pipe from after operating stick stretching with draw water
Pump is connected, and the lower end of sewage drainage pipe is extend out in the sewage collector from operating stick.
2. subsea production tree tubing hanger cleaning means as described in claim 1, which is characterized in that the power device, institute
State spray water with high pressure driving device and the suction pump is set to offshore platform.
3. subsea production tree tubing hanger cleaning means as described in claim 1, which is characterized in that the inner wall washing brush head
For columnar flexible steel wire brush.
4. subsea production tree tubing hanger cleaning means as described in claim 1, which is characterized in that the sewage collector with
The bottom thread of the tubing hanger connects.
5. subsea production tree tubing hanger cleaning means as claimed in claim 4, which is characterized in that the sewage collector side
Wall is equipped with the external screw thread to match with the pipe hanger screw thread of the tubing hanger bottom.
6. subsea production tree tubing hanger cleaning means as described in claim 4 or 5, which is characterized in that the sewage collecting
Device inner wall is equipped with internal screw thread or groove for mounting and dismounting the sewage collector.
7. subsea production tree tubing hanger cleaning means as described in claim 1, which is characterized in that the tubing hanger upper end with
It is shorted and is threadedly coupled, the operating stick is passed through to be shorted and be protruded into the tubing hanger, is set between the operating stick and short circuit
There is nonmetallic sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821892428.1U CN209293753U (en) | 2018-11-16 | 2018-11-16 | Subsea production tree tubing hanger cleaning means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821892428.1U CN209293753U (en) | 2018-11-16 | 2018-11-16 | Subsea production tree tubing hanger cleaning means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209293753U true CN209293753U (en) | 2019-08-23 |
Family
ID=67644621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821892428.1U Withdrawn - After Issue CN209293753U (en) | 2018-11-16 | 2018-11-16 | Subsea production tree tubing hanger cleaning means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209293753U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209296A (en) * | 2018-11-16 | 2019-01-15 | 美钻深海能源科技研发（上海）有限公司 | Subsea production tree tubing hanger cleaning means |
| CN113180570A (en) * | 2021-03-28 | 2021-07-30 | 杭州舟关信息科技有限公司 | Automatic cleaning device for drain hole of dish-washing machine |
-
2018
- 2018-11-16 CN CN201821892428.1U patent/CN209293753U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209296A (en) * | 2018-11-16 | 2019-01-15 | 美钻深海能源科技研发（上海）有限公司 | Subsea production tree tubing hanger cleaning means |
| CN109209296B (en) * | 2018-11-16 | 2024-01-12 | 美钻深海能源科技研发（上海）有限公司 | Cleaning tool for tubing hanger of underwater christmas tree |
| CN113180570A (en) * | 2021-03-28 | 2021-07-30 | 杭州舟关信息科技有限公司 | Automatic cleaning device for drain hole of dish-washing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191230 Address after: 20103 C Building, 888 Huanhu West Second Road, Nanhui New Town, Pudong New District, Shanghai Co-patentee after: MSP-DRILEX (SHANGHAI) Co.,Ltd. Patentee after: MEIZUAN DEEP SEA ENERGY TECHNOLOGY RESEARCH AND DEVELOPMENT (SHANGHAI) Co.,Ltd. Co-patentee after: Shanghai ocean engineering equipment manufacturing Innovation Center Co.,Ltd. Address before: The new town of Pudong New Area Nanhui lake west two road 201306 Shanghai City No. 888 building C Co-patentee before: MSP-DRILEX (SHANGHAI) Co.,Ltd. Patentee before: MEIZUAN DEEP SEA ENERGY TECHNOLOGY RESEARCH AND DEVELOPMENT (SHANGHAI) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190823 Effective date of abandoning: 20240112 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190823 Effective date of abandoning: 20240112 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |