CN115898276A - Shallow water sitting tubular column - Google Patents
Shallow water sitting tubular column Download PDFInfo
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- CN115898276A CN115898276A CN202211417996.7A CN202211417996A CN115898276A CN 115898276 A CN115898276 A CN 115898276A CN 202211417996 A CN202211417996 A CN 202211417996A CN 115898276 A CN115898276 A CN 115898276A
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- valve
- joint
- detachable connection
- blowout prevention
- quick
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to a shallow water landing pipe column, which comprises a ground test tree, a blowout prevention short section, a quick joint, a gate valve, a plurality of oil pipes, a shearing blowout prevention valve and a tubing hanger feeding tool, wherein the ground test tree is connected with the blowout prevention short section through the quick joint; the bottom of ground test tree with prevent spouting the detachable connection of nipple joint, prevent spouting the bottom of nipple joint with the detachable grafting of quick-operation joint is connected, quick-operation joint's bottom with the detachable connection of slide valve, the bottom and one of slide valve oil pipe is detachable to be connected, a plurality of detachable connection between the oil pipe, oil pipe's bottom with the top detachable connection of shearing blowout prevention valve, the bottom of shearing blowout prevention valve with the detachable connection of instrument is sent into to the tubing hanger. The shallow water sitting pipe column is used for a deep water pipe column in shallow sea, so that direct production at the bottom of a well is realized during shallow sea operation, facilities such as a platform are omitted, and the normal expansion of marine oil work is ensured under the condition of ensuring the smoothness of a navigation channel.
Description
Technical Field
The invention relates to a shallow water sitting pipe column, and belongs to the field of petroleum exploration equipment.
Background
When the semi-submersible platform under-tree well completion operation process is used for running an upper well completion pipe string, an underwater wellhead sitting pipe string needs to be equipped, the sitting pipe string needs to meet the requirements of the maximum outer diameter, the smooth passing of a marine riser and a blowout preventer group of a target operation platform and the minimum inner drift diameter, and the running requirements of a tubing hanger and a steel wire tool are met; the system has the working capabilities of installing and recovering a tubing hanger, starting a pump of an oil production well, providing a blowout-preventing channel for well cleaning and flowback, providing a well control barrier for an emergency pipe well and the like.
Because the shallow sea area involves the problem of occupying a channel, the shallow sea area exploitation mode generally adopts an offshore oil exploitation module form, namely a permanent oil exploitation platform is established above the sea surface, once the oil exploitation platform is established, commercial transport ships cannot pass nearby, and at present, oil reservoirs of the Bohai sea part are in the channel range, so that exploitation cannot be carried out according to the previous mode, but the problem of channel occupation does not exist in the deepwater oil exploitation completion process.
At present, the sitting pipe column is mainly applied to deepwater underwater well completion operation, but aiming at a shallow water underwater well completion process, the deepwater pipe column is too complex in structure and has an underwater pipe column release function under an emergency condition. The shallow water underwater well completion adopts self-elevating platform operation, and underwater wellhead equipment cannot be emergently disengaged, so that the sitting tubular column does not need to be provided with an emergency disengaging function, the deep water sitting tubular column cannot be universal, and the tubular column structural design is required to be pertinently carried out to meet the requirements of offshore shallow water underwater well completion operation.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a shallow water landing pipe column, so that when shallow sea operation is carried out, direct production at the bottom of a well is realized, facilities such as a platform are not needed, and the normal expansion of marine oil work is ensured under the condition of ensuring the smoothness of a navigation channel.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a shallow water landing pipe column which comprises a ground test tree, a blowout prevention short section, a quick joint, a gate valve, a plurality of oil pipes, a shearing blowout prevention valve and a tubing hanger feeding tool, wherein the blowout prevention short section is arranged on the ground test tree;
the bottom of ground test tree with prevent spouting the detachable connection of nipple joint, prevent spouting the bottom of nipple joint with the detachable grafting connection of quick-operation joint, quick-operation joint's bottom with the detachable connection of slide valve, the bottom of slide valve with the detachable connection of oil pipe, oil pipe's bottom with the top detachable connection of shearing blowout prevention valve, the bottom of shearing blowout prevention valve with the tubing hanger sends into the detachable connection of instrument, the tubing hanger sends into between instrument and the tubing hanger detachable connection.
The shallow water sitting pipe column comprises at least one pressure-bearing short section, the top end and/or the bottom end of the pressure-bearing short section are/is detachably connected with the oil pipe, a plurality of hydraulic channels are formed in the side wall of the pressure-bearing short section, and the top end and the bottom end of each hydraulic channel are communicated with a hydraulic pipeline.
The shearing blowout prevention valve is a ball valve, the ball valve is provided with an open-well state and a closed-well state, when the ball valve is in the open-well state, the ball valve is provided with a channel for downhole tool strings and well liquid to pass through, when the ball valve is in the closed-well state, the ball valve is provided with a function of shearing ropes, and the ropes are used for lowering the tool strings.
The ground test tree comprises a paraffin removal valve, a lower main valve, a kill wing valve and a production wing valve, and when the paraffin removal valve and the kill wing valve are closed, the lower main valve and the production wing valve are opened to finish cleaning, spraying or squeezing operation; when the paraffin removal valve and the lower main valve are closed, the production wing valve and the kill wing valve are opened to complete flow pressure test operation; and when the kill wing valve is closed, opening the paraffin removal valve, the lower main valve and the production wing valve to complete the artificial lifting operation.
Quick-operation joint includes top connection, lower clutch, adapter sleeve and tightly decides the pin, pass through between the bottom of top connection and the top of lower clutch the adapter sleeve is connected, the adapter sleeve with the position that top connection and lower clutch are connected passes through tightly decide the pin and fasten.
Due to the adoption of the technical scheme, the invention has the following advantages:
the integral pipe column adopts the structures of an oil pipe hanger, an oil pipe hanger feeding tool, an anti-spraying valve, a pressure-bearing short section and the like, and the structures are pipe column structures for deep water, so that the deep water pipe column is simplified, partial necessary functions are reserved for being suitable for shallow water, the problem of channel occupation is solved, and the requirements of shallow water oil extraction and well completion can be met.
The underwater tree part in the deepwater pipe column is omitted, and the blowout prevention valve and the pressure-bearing short section are used, so that the pipe column can be emergently released in the test process if an emergency occurs.
The upper end oil test tree adopts a small-size oil test tree, so that the labor and material time is saved, the safety in the operation process is improved, and the risk is reduced when the test operation is carried out.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like parts are designated with like reference numerals throughout the drawings.
In the drawings:
FIG. 1 is a burst view of one embodiment of a shallow water landing string;
FIG. 2 is a schematic diagram of an embodiment of a ground test tree;
FIG. 3 is a schematic structural view of one embodiment of a quick connector;
FIG. 4 is a schematic structural diagram of an embodiment of a pressure-bearing sub;
FIG. 5 is a schematic structural view of an embodiment of a shear blow-out prevention valve;
the reference symbols in the drawings denote the following:
1-ground Christmas tree, 2-blowout prevention short joint, 3-quick joint, 4-gate valve, 5-oil pipe, 6-pressure-bearing short joint, 7-shearing blowout prevention valve, 8-oil pipe hanger feeding tool, 9-hydraulic channel, 11-paraffin removal valve, 12-production wing valve, 13-lower main valve and 14-kill wing valve.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a shallow water sitting tubular column which comprises a ground test tree, a blowout prevention short section, a quick joint, a gate valve, a plurality of oil pipes, a shearing blowout prevention valve and a tubing hanger feeding tool, wherein the ground test tree is connected with the blowout prevention short section through the quick joint; the bottom of ground test tree with prevent spouting the detachable connection of nipple joint, prevent spouting the bottom of nipple joint with the detachable plug-in connection of quick-operation joint, quick-operation joint's bottom with the detachable connection of slide valve, the bottom and one of slide valve oil pipe detachable connection, a plurality of detachable connection between the oil pipe, oil pipe's bottom with the top detachable connection of shearing blowout prevention valve, the bottom of shearing blowout prevention valve with the tubing hanger sends into the detachable connection of instrument, the tubing hanger sends into detachable connection between instrument and the tubing hanger. The shallow water sitting pipe column is used for a deep water pipe column in shallow sea, so that direct production at the bottom of a well is realized during shallow sea operation, facilities such as a platform are omitted, and the normal expansion of marine oil work is ensured under the condition of ensuring the smoothness of a navigation channel.
Example 1
As shown in fig. 1 to 5, an embodiment of the present invention provides a shallow water sitting pipe string, which includes a surface test tree 1, a blowout-preventing nipple 2, a quick coupling 3, a gate valve 4, a plurality of oil pipes 5, a shearing blowout-preventing valve 7, and a tubing hanger running tool 8. The bottom of ground test tree 1 with prevent spouting nipple joint 2 detachable connection, prevent spouting nipple joint 2 the bottom with the detachable plug-in connection of quick-operation joint 3, the bottom of quick-operation joint 3 with the detachable connection of slide valve 4, the bottom of slide valve 4 with the detachable connection of oil pipe 5, a plurality of detachable connection between the oil pipe 5, the bottom of oil pipe 5 with the top detachable connection of shearing blowout prevention valve 7, the bottom of shearing blowout prevention valve 7 with the detachable connection of instrument 8 is sent into to the tubing hanger, detachable connection between instrument 8 and the tubing hanger is sent into to the tubing hanger.
The tubing hanger feeding tool 8 at the bottom of the shallow water sitting tubing string is connected with the tubing hanger, the bottom end of the tubing hanger is connected with the completion tool string, the shallow water sitting tubing string, the tubing hanger and the completion tool string are lowered to the bottom of the well by increasing the number of sections of the tubing 5 in the using process, when the tubing hanger reaches the designated position in the adopted tree, the tubing hanger stops continuing to be lowered, the tubing hanger is located at the corresponding position on the adopted tree, and the completion operation is completed through the shallow water sitting tubing string. In the well completion process, the tool is preset into the blowout prevention nipple 2 through the quick disassembly or connection between the blowout prevention nipple 2 and the quick connector 3, then the quick connector 3 is in butt joint connection, and then the tool is put in. After completion, the tubing hanger running tool 8 is disconnected from the tubing hanger, the shallow water sitting string is taken out from the bottom of the well, and oil production is started.
The ground test tree 1 is conventional small-size wellhead fluid control equipment, comprises a paraffin removal valve 11, a lower main valve 13, a kill wing valve 14 and a production wing valve 12, and can be matched to complete pressure test, cleaning and spraying, squeezing and artificial lifting operations according to field process requirements, for example, the paraffin removal valve 11 and the kill wing valve 14 are closed, and the lower main valve 13 and the production wing valve 12 are opened to complete cleaning and spraying operations; closing the paraffin removal valve 11 and the production wing valve 12, and opening the lower main valve 13 and the kill wing valve 14 to complete the squeezing operation; closing the paraffin removal valve 11 and the lower main valve 13, and opening the production wing valve 12 and the kill wing valve 14 to complete the process pressure test operation; and (4) closing the kill wing valve 14, and opening the paraffin removal valve 11, the lower main valve 14 and the production wing valve 12 to complete the artificial lifting operation. The surface test tree 1 is shown as a control unit for high pressure fluid at the wellhead, providing a safety barrier.
The bottom of the ground test tree 1 is detachably connected with the blowout prevention nipple 2, and the bottom end of the blowout prevention nipple 2 is detachably connected with the quick coupling 3 in an inserting mode. The ground test tree 1 is a small-size test tree 1 with a small inner diameter, if the outer diameter of a tool to be put in exceeds the inner diameter of the ground test tree 1, the quick joint 3 needs to be disassembled, the tool is preset into the blowout prevention nipple 2, then the quick joint 3 is in butt joint connection, and then the tool is put in.
For a tool with the outer diameter exceeding the inner diameter of the ground test tree 1, the blowout prevention short section 2 and the quick coupling 3 need to be connected or disassembled repeatedly for a plurality of times in order to be placed from the top of the blowout prevention short section 2 to the bottom of the well repeatedly in the midway, and the blowout prevention short section 2 and the quick coupling 3 adopt detachable splicing connection in order to be connected and disassembled quickly between the quick coupling 3 and the blowout prevention short section 2. Compare the mode of rotating the connection, adopt detachable plug connection can avoid hydraulic pressure pipeline etc. to twist off at the in-process of dismantling.
Quick-operation joint 3 includes top connection, lower clutch, adapter sleeve and tightly decides the pin, pass through between the bottom of top connection and the top of lower clutch the adapter sleeve is connected, the adapter sleeve with the position that top connection and lower clutch are connected passes through tightly decide the pin and fasten. The upper joint is connected with the bottom of the blowout prevention short section 2 in an inserting manner, and the lower joint is connected with the gate valve 4 in an inserting manner.
The inner diameter of the blowout prevention nipple 2 can be adjusted according to actual operation requirements, and the large-size steel wire tool string can be lifted to a gate valve above 4, so that the tool string can be replaced on site. The blowout prevention short section 2 and the gate valve 4 are quickly disassembled and connected through the quick connector 3, and the blowout prevention short section 2 is connected with the upper connector of the quick connector 3 in advance during field operation. The gate valve 4 is a manual gate valve.
The gate valve 4 is a platform upper portion blowout preventer, the inner portion of the pipe column is isolated through a switch of the gate valve 4, upper portion pressure is released, and the gate valve 4 is connected with a lower connector of the quick connector 3 in advance.
Through the sequential connection of the oil pipes 5, the shallow water sitting pipe column, the oil pipe hanger connected with the bottom of the shallow water sitting pipe column and the tool string connected with the bottom of the oil pipe hanger can be placed to the bottom of the well.
The shearing blowout prevention valve 7 is shallow water sitting pipe column core emergency well closing equipment, can realize well closing operation under emergency well control conditions, has an upper pumping function, and can provide a positive extrusion well fluid channel. The shear blowout prevention valve 7 is preferably a ball valve, the ball valve has an open-hole state and a closed-hole state, when the ball valve is in the open-hole state, the ball valve is provided with a passage for a downhole tool string and well fluid to pass through, when the ball valve is in the closed-hole state, the ball valve has a function of shearing a rope, and the rope is used for lowering the tool string.
The bottom end of the tubing hanger feeding tool 8 is detachably connected with the tubing hanger, the bottom end of the tubing hanger is detachably connected with the downhole tool string, when the shallow water landing tubing string is used for lowering the tubing hanger to a specified position in a Christmas tree, the tubing hanger is clamped at the specified position of the Christmas tree, the underground tool string is hung on the tubing hanger, and the tubing hanger is used as a force bearing part.
Further, in order to transmit ground hydraulic control pressure to the position below the pressure-bearing short section 6, chemical agents can be injected to the position below the pressure-bearing short section 6 through a pore channel, the shallow water landing pipe column further comprises at least one pressure-bearing short section 6, the top end and the bottom end of the pressure-bearing short section 6 are respectively detachably connected with different oil pipes 5 through joints, a plurality of hydraulic channels 10 are formed in the side wall of the pressure-bearing short section 6, the top end and the bottom end of each hydraulic channel 10 are communicated with a hydraulic pipeline, the hydraulic pipelines are located on the outer side of the shallow water landing pipe column, and the hydraulic pipelines are communicated through the hydraulic channels 10 at the position of the pressure-bearing short section 6. The pressure-bearing short section 6 is necessary equipment for a sitting pipe column system, and can be matched with the shearing blowout preventer 7 and the gate valve 4 to realize annular space packing. Therefore, compared with the hydraulic pipeline which is an integral pipeline, the hydraulic pipeline 10 is disconnected at the pressure-bearing short section 6 and is communicated through the hydraulic channel 10, so that annular space sealing can be realized and the pressure transfer capacity of the hydraulic channel can be guaranteed when the shearing blowout preventer 7 and the gate valve 4 are closed.
Specifically, 26 hydraulic channels 10 are formed in the side wall of the pressure-bearing short section 6, the hydraulic channels 10 can be used for providing channel connection of different liquids, and comprise a feeding tool control pipeline, a blowout preventer control pipeline, a chemical agent injection pipeline and the like of an oil pipe hanger, and the outer diameter size of the pressure-bearing short section is consistent with the sealing size of a blowout preventer ram.
The shallow water sitting pipe column provided by the invention is used for shallow sea by using a deep water pipe column, so that the direct production at the well bottom is realized during the shallow sea operation, the facilities such as a platform and the like are avoided, and the normal expansion of the marine oil work is ensured under the condition of ensuring the smooth navigation channel.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A shallow water sitting tubular column is characterized by comprising a ground test tree, a blowout prevention short joint, a quick joint, a gate valve, a plurality of oil pipes, a shearing blowout prevention valve and a tubing hanger feeding tool;
the bottom of ground test tree with prevent spouting the detachable connection of nipple joint, prevent spouting the bottom of nipple joint with the detachable grafting connection of quick-operation joint, quick-operation joint's bottom with the detachable connection of slide valve, the bottom of slide valve with the detachable connection of oil pipe, oil pipe's bottom with the top detachable connection of shearing blowout prevention valve, the bottom of shearing blowout prevention valve with the tubing hanger sends into the detachable connection of instrument, the tubing hanger sends into between instrument and the tubing hanger detachable connection.
2. The shallow water landing string according to claim 1, comprising at least one pressure-bearing nipple, wherein the top end and/or the bottom end of the pressure-bearing nipple is detachably connected with the oil pipe, a plurality of hydraulic channels are formed in the side wall of the pressure-bearing nipple, and the top end and the bottom end of each hydraulic channel are communicated with a hydraulic pipeline.
3. The shallow water landing string of claim 1, wherein the shear blowout preventer is a ball valve, the ball valve having an open position and a closed position, the ball valve providing a passage for a downhole tool string and well fluid when the ball valve is in the open position, the ball valve functioning as a shear line for lowering the tool string when the ball valve is in the closed position.
4. The shallow water landing string of claim 1, wherein the ground test tree comprises a paraffin removal valve, a lower main valve, a kill wing valve and a production wing valve, and when the paraffin removal valve and the kill wing valve are closed, the lower main valve and the production wing valve are opened to complete a cleaning or squeezing operation; when the paraffin removal valve and the lower main valve are closed, the production wing valve and the kill wing valve are opened to complete flow pressure test operation; and when the kill wing valve is closed, the paraffin removal valve, the lower main valve and the production wing valve are opened to complete the artificial lifting operation.
5. A shallow water landing string as claimed in claim 1, wherein the quick connector comprises an upper connector, a lower connector, a connecting sleeve and a locking pin, the connecting sleeve is connected between the bottom of the upper connector and the top of the lower connector, and the connecting sleeve is fastened by the locking pin with the connection part of the upper connector and the lower connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211417996.7A CN115898276A (en) | 2022-11-14 | 2022-11-14 | Shallow water sitting tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211417996.7A CN115898276A (en) | 2022-11-14 | 2022-11-14 | Shallow water sitting tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115898276A true CN115898276A (en) | 2023-04-04 |
Family
ID=86495005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211417996.7A Pending CN115898276A (en) | 2022-11-14 | 2022-11-14 | Shallow water sitting tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115898276A (en) |
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2022
- 2022-11-14 CN CN202211417996.7A patent/CN115898276A/en active Pending
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