CN113006717B - Marine underwater coiled tubing equipment and method - Google Patents
Marine underwater coiled tubing equipment and method Download PDFInfo
- Publication number
- CN113006717B CN113006717B CN202110253054.9A CN202110253054A CN113006717B CN 113006717 B CN113006717 B CN 113006717B CN 202110253054 A CN202110253054 A CN 202110253054A CN 113006717 B CN113006717 B CN 113006717B
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- coiled tubing
- oil pipe
- underwater
- clamping
- wellhead
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- 238000000034 method Methods 0.000 title claims description 8
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 239000002131 composite material Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 230000002265 prevention Effects 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000002457 bidirectional effect Effects 0.000 claims description 16
- 238000010008 shearing Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 71
- 239000007789 gas Substances 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000346 nonvolatile oil Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
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- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
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- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
Abstract
The invention discloses marine underwater coiled tubing equipment, which comprises an oil pipe injection head and a wellhead connector, wherein the lower end of the oil pipe injection head is connected with the upper end of the wellhead connector, the upper end of the oil pipe injection head is provided with a top bracket capable of bearing the weight of the marine underwater coiled tubing equipment, the top bracket is connected with a composite steel core cable used for controlling the work and signal transmission of the marine underwater coiled tubing equipment, the lower end of the wellhead connector is fixedly provided with a hydraulic connector used for being connected with the underwater wellhead connector, the coiled tubing enters the oil pipe injection head from the top bracket of the oil pipe injection head, passes through the oil pipe injection head and the wellhead connector and then passes out of the wellhead connector to enter an underwater wellhead, and a coiled tubing clamping and lifting structure used for clamping and lifting the coiled tubing is fixed in the oil pipe injection head. The invention is mainly used for setting the lifting coiled tubing equipment in the invention, is free from the high cost of a deepwater platform, avoids the instability of the lifting coiled tubing, and improves the suitability of different engineering vessels.
Description
Technical Field
The invention relates to the field of marine underwater coiled tubing transportation, in particular to marine underwater coiled tubing equipment and a marine underwater coiled tubing method.
Background
The coiled tubing is also called coiled tubing, is made of low-carbon alloy, has good bending deformation capacity, has the length of a coil of coiled tubing of several kilometers, has the advantages of pressurized operation and quick take-off speed, is widely applied to the operation fields of oil and gas well drilling, well completion, well repairing, oil testing and test production, well logging and the like, penetrates through the whole process of oil and gas exploitation, and plays an important role in the exploration and development of petroleum and natural gas.
At present, a coiled tubing used in deep sea must depend on a deep water platform, but a plurality of problems can occur when the deep water platform is utilized: 1. the construction difficulty of establishing a deepwater platform at sea is high; 2. the deepwater platform is required to be provided with a heave compensation system when the coiled tubing is lifted to a preset underwater wellhead, and the heave compensation system is used for counteracting the influence of sea wave heave on the deepwater platform, so that the precision of lifting and lowering the coiled tubing is conveniently controlled to achieve that the coiled tubing accurately reaches the underwater wellhead; 3. the deep water platform is used for lifting the coiled tubing, and a riser or a drill rod is also required for guiding and protecting the coiled tubing to reach a preset underwater wellhead. The use of the coiled tubing in deep sea generates high cost and reduces the operation efficiency, and further popularization and use of the coiled tubing and marine oil and gas exploration and development are restricted.
In addition, in the prior art, there is also a coiled tubing device which does not need a deep water platform, such as the application of publication No. CN 111448362A, but the coiled tubing device inevitably needs to set a driving unit (HCI) in advance on a ship for compensating the oscillating motion of the ship and lifting the coiled tubing, which is not beneficial to the adaptability of the coiled tubing device on different ships.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the invention is to provide marine underwater continuous oil pipe equipment, which can solve the problems that a deep water platform is not supported and a main equipment is placed in the marine underwater continuous oil pipe equipment to realize the lifting of a continuous oil pipe;
the second purpose of the invention is to provide a using method based on the marine underwater continuous oil pipe equipment, which can solve the problem that a deep water platform is not supported and a main equipment is placed in the marine underwater continuous oil pipe equipment to realize the lifting of the continuous oil pipe.
The technical scheme for realizing one of the purposes of the invention is as follows: the marine underwater coiled tubing equipment comprises an oil pipe injection head and a wellhead connector, wherein the lower end of the oil pipe injection head is connected with the upper end of the wellhead connector;
the wellhead connector comprises a hydraulic connector, the hydraulic connector is fixedly arranged at the lower end of the wellhead connector, and the hydraulic connector is used for being fixedly connected with an underwater wellhead located in an operation area so as to enable marine underwater coiled tubing equipment to be fixedly arranged on the underwater inlet head;
the coiled tubing injection head comprises a coiled tubing clamping structure, the coiled tubing clamping structure is fixedly arranged in the coiled tubing injection head, and the coiled tubing clamping structure is used for clamping the coiled tubing which enters from the coiled tubing injection head and passes through the wellhead connector, so that the coiled tubing enters into the underwater wellhead under the clamping action of the coiled tubing clamping structure.
Further coiled tubing centre gripping plays down structure includes main drive wheel, supplementary take-up pulley, annular chain, and each main drive wheel is installed in coiled tubing's side, and supplementary take-up pulley is corresponding to below each main drive wheel, and main drive wheel and supplementary take-up pulley pass through annular chain transmission and connect, are provided with a plurality of grip block on the annular chain, and the grip block is used for the centre gripping to play coiled tubing down.
Further, the coiled tubing clamping and lifting structure is further provided with a bidirectional clamp holder, the bidirectional clamp holder is fixedly arranged between annular chains on two sides of the coiled tubing, the left end of the bidirectional clamp holder is connected with the annular chain part of the left annular chain, which is close to the coiled tubing, and the right end of the bidirectional clamp holder is connected with the annular chain part of the right annular chain, which is close to the coiled tubing, so that clamping blocks on the annular chains on two sides of the coiled tubing are mutually close to clamp the coiled tubing.
Further, the coiled tubing clamping and lifting structure further comprises a clamping device, the left end of the clamping device is connected with the part, close to the coiled tubing, of the annular chain on the left side of the coiled tubing, the right end of the clamping device is connected with the part, far away from the coiled tubing, of the annular chain on the right side of the clamping device, and the clamping device is used for providing transverse clamping force and preventing the annular chain from being separated from the main driving wheel when rotating.
Further, the upper end of the wellhead connector is fixedly provided with a hydraulic blowout prevention box, the lower end of the oil pipe injection head is connected with the upper end of the wellhead connector through the hydraulic blowout prevention box, the coiled oil pipe sequentially penetrates through the oil pipe injection head, the hydraulic blowout prevention box and the wellhead connector, a rubber core is arranged in the hydraulic blowout prevention box, and the rubber core released from the hydraulic blowout prevention box is used for filling and sealing an annular space between the coiled oil pipe and the hydraulic blowout prevention box.
Further, the blowout prevention box lower extreme fixed connection is used for holding coiled tubing's lubricator, and the bottom fixed connection hydraulic connector of lubricator is built-in perpendicularly in the well head connector, and the coiled tubing that wears out from the well head connector passes the lubricator, and the lubricator bears outside high pressure in order to protect and hold coiled tubing wherein.
Further, the wellhead connector further comprises a shear ram blowout preventer fixedly connected to the lower end of the lubricator and the upper end of the hydraulic connector, and the shear ram blowout preventer is used for shearing a coiled tubing passing through the shear ram blowout preventer and for closing the lower end of the lubricator.
Further, the inside of well head connector is fixed and is provided with a plurality of one-level energy storage ware, and one-level energy storage ware and shearing ram preventer are connected, and one-level energy storage ware inside stores high-pressure gas, and high-pressure gas is used for providing extra auxiliary power for shearing ram preventer.
Further, the top support is installed to the upper end of oil pipe injection head, and the top support is used for fixed connection compound steel core cable and bears the weight of whole ocean underwater coiled tubing equipment, and the outer frame of oil pipe injection head is connected to the lower extreme of top support, and coiled tubing centre gripping plays structure fixed connection in outer frame down, and outer frame is used for protecting coiled tubing centre gripping to play down the structure and avoids the striking, and the upper end of wellhead connector is connected to the lower extreme of outer frame.
The second technical scheme for realizing the purpose of the invention is as follows: the application method of the marine underwater coiled tubing equipment comprises the following steps:
step one: before launching, the coiled tubing extends out of a coiled tubing roller of the engineering ship and is inserted into an oil tube injection head; the composite steel core cable on the engineering ship is connected with marine underwater coiled tubing equipment;
step two: starting a coiled tubing clamping and lifting structure in the tubing injection head, wherein the coiled tubing clamping and lifting structure is used for conveying the coiled tubing inserted into the tubing injection head in the first step into a wellhead connector, so that the coiled tubing is clamped in marine underwater coiled tubing equipment and is lowered into water along with the marine underwater coiled tubing equipment;
step three: lifting marine underwater coiled tubing equipment to be launched into water by a crane on an engineering ship;
step four: the marine underwater coiled tubing equipment simultaneously carries a composite steel core cable and a coiled tubing to be put into water;
step five: the underwater robot matched with the engineering ship assists the marine underwater coiled tubing equipment to approach the underwater wellhead, finally sit on the underwater wellhead, and the hydraulic connector at the lower end of the wellhead connector fixes and sits the marine underwater coiled tubing equipment on the wellhead;
step six: starting the coiled tubing clamping and lifting structure, and conveying the coiled tubing by the coiled tubing clamping and lifting structure, wherein the coiled tubing in the wellhead connector is clamped and lifted by the coiled tubing and conveyed to the bottom of the well in the second step;
step seven: and executing the operation contents of drilling, workover, testing and the like by matching with the coiled tubing downhole tool assembly at the lowest end of the coiled tubing.
The beneficial effects of the invention are as follows: the invention can utilize a general engineering ship as a carrier, does not need to establish a deep water platform on the sea in advance, does not need to place main equipment for a marine oscillation compensation system on the engineering ship in advance, and can finish the operation requirements of drilling, well repair, testing and the like of a marine oil and gas well by taking down the coiled tubing into and out of an underwater wellhead after the marine underwater coiled tubing equipment is put down to a preset underwater wellhead head. The invention will break away from the high cost of the deepwater platform and avoid the instability of the coiled tubing and improve the suitability of different engineering vessels.
Drawings
FIG. 1 is a schematic diagram of the working structure of marine underwater coiled tubing equipment in combination with a conventional engineering ship;
FIG. 2 is a schematic diagram of the overall structure of a marine underwater coiled tubing apparatus;
FIG. 3 is a schematic view of the structure of an oil pipe connector of a marine underwater coiled tubing apparatus;
FIG. 4 is a schematic view of the structure of a wellhead connector of a marine subsea coiled tubing unit;
in the figure, 1-composite steel core cable, 2-coiled tubing, 3-top bracket, 4-outer frame, 5-multichannel hydraulic distributor, 6-pressure indicator, 7-main driving wheel, 8-annular chain, 9-clamping device, 10-bidirectional clamp, 11-clamping block, 12-auxiliary tensioning wheel, 13-suspension weight sensor, 14-underwater camera, 15-hydraulic blowout prevention box, 16-hydraulic station, 17-blowout prevention pipe, 18-emergency hydraulic socket, 19-shear ram blowout preventer, 20-primary accumulator, 21-hydraulic balancer, 22-hydraulic connector, 23-underwater wellhead, 24-coiled tubing downhole tool assembly, 25-composite cable winch, 26-coiled tubing equipment control center, 27-coiled tubing drum, 28-sea level, 29-engineering ship, 100-tubing injection head, 200-wellhead connector, 300-marine underwater coiled tubing equipment.
Detailed Description
The invention will be further described with reference to the accompanying drawings and detailed description below:
as shown in fig. 1-4, a marine subsea coiled tubing unit 300 is schematically configured to operate in conjunction with a conventional engineering vessel 29. The engineering ship 29 is arranged on the sea level 28 at the upper part of fig. 1, the engineering ship 29 is a conventional engineering ship, other driving devices with heave compensation systems are not required to be arranged in advance, and the engineering ship 29 comprises a composite cable winch 25, a continuous oil pipe roller 27 and a continuous oil pipe equipment control center 26.
The above-mentioned composite cable winch 25 is used for accommodating and extending out of the composite steel core cable 1, the composite steel core cable 1 is a composite armor cable with high strength, the inner core is woven by steel wires, the periphery is a multi-strand cable and a signal wire, the extending composite steel core cable 1 is connected with the upper end of the marine underwater continuous oil pipe device 300, and provides power and transmission signals for the marine underwater continuous oil pipe device 300; the coiled tubing roller 27 is used for accommodating and extending the coiled tubing 2, the coiled tubing 2 is generally made of low-carbon alloy and can be repeatedly bent, the single length can reach several kilometers, and one end of the extended coiled tubing 2 is inserted into the marine underwater coiled tubing equipment 300; the equipment control center 26 transmits an electric signal through the composite steel core cable 1 to control the marine underwater coiled tubing equipment 300 to lift the coiled tubing 2, and can also receive the electric signal from the marine underwater coiled tubing equipment 300 to know the working state of the marine underwater coiled tubing equipment 300.
The engineering vessel 29 transports the marine subsea coiled tubing unit 300 above the pre-set subsea wellhead 23, lowers the marine subsea coiled tubing unit 300 into the sea, and brings the marine subsea coiled tubing unit 300 with the coiled tubing 2 and the composite steel core cable 1 closer to the subsea wellhead 23. Either the general engineering vessel 29 or the deepwater platform is equipped with an underwater robot (the underwater robot is not shown in the figure) which can accurately seat the marine underwater coiled tubing apparatus 300 on the underwater wellhead 23, and the marine underwater coiled tubing apparatus 300 lifts the coiled tubing 2 into the underwater wellhead 23.
The coiled tubing 2 is provided with a coiled tubing downhole tool assembly 24 at the lower end, and the coiled tubing downhole tool assembly 24 can be provided with a proper tool to complete downhole drilling, well repair, testing and other operations.
As shown in fig. 2, which is a schematic diagram of the overall structure of the marine underwater coiled tubing apparatus 300, the marine underwater coiled tubing apparatus 300 includes a tubing injector head 100 and a wellhead connector 200. The uppermost end of the oil pipe injection head 100 is connected with the composite steel core cable 1, the lower end of the oil pipe injection head 100 is connected with the upper end of the wellhead connector 200, and the continuous oil pipe 2 enters from the uppermost end of the oil pipe injection head 100, passes through the oil pipe injection head 100 and the wellhead connector 200 and enters into the underwater wellhead 23.
A schematic of the tubing injector head 100 of a marine underwater coiled tubing apparatus 300 is shown in fig. 3. The oil pipe injection head 100 comprises a top bracket 3, an outer frame 4, a hydraulic distributor 5, a pressure indicator 6, a main driving wheel 7, an annular chain 8, a clamping device 9, a bidirectional clamp 10, a clamp block 11, an auxiliary tension wheel 12 and a suspended weight sensor 13. The uppermost end of the oil pipe injection head 100 is a top bracket 3, and the top bracket 3 is used for fixedly connecting the composite steel core cable 1 and bearing the weight of the whole marine underwater coiled oil pipe equipment 300. The lower end of the top bracket 3 is connected with an outer frame 4, the outer frame 4 is a frame of the oil pipe injection head 100, all components in the oil pipe injection head 100 are fixedly arranged in the outer frame 4, and the outer frame 4 is used for protecting all components in the outer frame 4 from being impacted. The outer frame 4 is internally fixedly provided with at least two main driving wheels 7, the two main driving wheels 7 are positioned at two sides of the continuous oil pipe 2 entering the oil pipe injection head 100, an auxiliary tensioning wheel 12 is fixed at the lower position of each main driving wheel 7, the main driving wheels 7 and the auxiliary tensioning wheels 12 at the same side are connected through annular chains 8, the annular chains 8 are chains which are connected end to form a circle, are sleeved at the outer sides of the main driving wheels 7 and the auxiliary tensioning wheels 12, rotate circularly between the main driving wheels 7 and the auxiliary tensioning wheels 12 along with the rotation of the main driving wheels 7 and the auxiliary tensioning wheels 12 at the same side, a plurality of clamping blocks 11 are arranged on each annular chain 8, the clamping blocks 11 are uniformly distributed on the same annular chain 8, the main driving wheels 7, the auxiliary tensioning wheels 12, the annular chains 8 and the clamping blocks 11 are jointly formed into a continuous oil pipe clamping lifting structure, and the continuous oil pipe clamping lifting structure is used for stably lifting the continuous oil pipe 2. The bidirectional clamp holder 10 is fixedly arranged between the annular chains 8 on two sides of the continuous oil pipe 2, the left end of the bidirectional clamp holder 10 is connected with the annular chain 8 part of the left annular chain 8 close to the continuous oil pipe 2, the right end of the bidirectional clamp holder 10 is connected with the annular chain 8 part of the right annular chain 8 close to the continuous oil pipe 2, so that clamping blocks 11 on the annular chains 8 on two sides of the continuous oil pipe 2 are mutually close to clamp the continuous oil pipe 2. The left end of the clamping device 9 is connected with the part of the annular chain 8 on the left side of the continuous oil pipe 2, which is close to the annular chain 8 of the continuous oil pipe 2, the right end of the clamping device 9 is connected with the part of the annular chain 8 on the right side, which is far away from the continuous oil pipe 2, and the clamping device 9 is used for providing transverse clamping force and preventing the annular chain 8 from being separated from the main driving wheel 7 when rotating. The coiled tubing clamping and tripping structure specifically operates as follows: the rotation of the main driving wheel 7 and the auxiliary tensioning wheel 12 drives the annular chain 8 between the main driving wheel 7 and the auxiliary tensioning wheel 12 to circularly rotate between the main driving wheel 7 and the auxiliary tensioning wheel 12, the clamping force of the clamping block 11 on the continuous oil pipe 2 is enhanced by the bidirectional clamp 10 and the clamping device 9, and the continuous oil pipe 2 is lifted up and down through the rotation of the annular chain 8.
The outer frame 4 is also internally provided with a multi-way hydraulic distributor 5 for managing hydraulic circulation ways and controlling the action of hydraulic components in the marine underwater coiled tubing equipment 300, and the multi-way hydraulic distributor 5 is used for driving the main driving wheel 8 and the auxiliary tensioning wheel 12 to rotate and clamp the coiled tubing 2, and adjusting the clamping force of the clamping device 9 and the bidirectional clamp holder 10. The multichannel hydraulic distributor 5 consists of a multichannel valve and a pipeline. The multichannel hydraulic distributor 5 is provided with a plurality of pressure indicators 6, the pressure indicators 6 are used for displaying hydraulic pressure values of hydraulic channels in the main driving wheel 8, the auxiliary tensioning wheel 12, the clamping device 9 and the bidirectional clamp 10 in the marine underwater coiled tubing equipment 300, and different pressure indicators 6 are hydraulic pressure meters with different pressure levels.
The two sides of the lower end of the oil pipe injection head 100 are provided with hanging weight sensors 13, the hanging weight sensors 13 are used for measuring load data of acting force generated by blocking the coiled tubing when the coiled tubing clamping and lifting structure is lifted out and lowered down by the coiled tubing 2, particularly when the coiled tubing 2 is lifted up and lowered and blocked, the acting force blocking the coiled tubing 2 acts on the coiled tubing clamping and lifting structure conveying the coiled tubing 2, the coiled tubing clamping and lifting structure in the fixed oil pipe injection head 100 can generate acting force on the whole of the oil pipe injection head 100, the hanging weight sensors 13 are arranged on the two sides of the lower end of the oil pipe injection head 100 and used for measuring the load data generated by the acting force, and the load data are transmitted to the coiled tubing equipment control center 26 on the engineering ship 29 through the composite steel core cable 1 so as to respond to conditions.
Shown in fig. 4 is a schematic structural view of wellhead connector 200 of marine subsea coiled tubing apparatus 300. The uppermost end of the wellhead connector 200 is a hydraulic blowout prevention box 15, the hydraulic blowout prevention box 15 is connected with the lower end of the oil pipe injection head 100, the coiled oil pipe 2 penetrating through the oil pipe injection head 100 enters the wellhead connector 200 from the hydraulic blowout prevention box 15, a rubber core can be extruded or released from the hydraulic blowout prevention box 15, the rubber core is used for filling an annular space between the outside of the closed coiled oil pipe 2 and the inside of the hydraulic blowout prevention box 15, and the position of the coiled oil pipe 2 in the wellhead connector 200 is protected and stabilized.
The blowout prevention pipe 17 is connected to the lower extreme of hydraulic pressure blowout prevention box 15, and blowout prevention pipe 17 sets up perpendicularly in well head connector 200, and coiled tubing 2 after passing hydraulic pressure blowout prevention box 15 enters into blowout prevention pipe 17, and blowout prevention pipe 17 is the tubular container that is used for holding coiled tubing 2, can bear 100 psi's high pressure.
The lower end of the lubricator 17 is connected with a shearing ram blowout preventer 19, and the shearing ram blowout preventer 19 can be used for shearing the coiled tubing 2 in a short time and can be used for sealing a wellhead when blowout or the like occurs, and can also be used for sealing the wellhead when the coiled tubing 2 is not used.
The inside of well head connector 200 is fixedly provided with a plurality of first-stage energy storage ware 20, and first-stage energy storage ware 20 and shearing ram preventer 19 are connected, and the inside high-pressure gas that has stored of first-stage energy storage ware 20 can provide extra auxiliary power for shearing ram preventer 19.
The lower end of the shearing ram blowout preventer 19 is connected with a hydraulic connector 22, namely the lower end of a wellhead connector is fixedly provided with the hydraulic connector 22 for connecting the marine underwater coiled tubing equipment 300 and the underwater wellhead 23, the marine underwater coiled tubing equipment 300 is fixed to sit on the underwater wellhead 23, and the coiled tubing 2 passes through the hydraulic connector 22 and then enters the interior of the underwater wellhead from the underwater inlet head 23.
The wellhead connector 200 is also internally provided with a hydraulic station 16, the hydraulic station 16 comprises a closed hydraulic pump, a driving motor, a driving device control system and other components, and the driving motor drives the closed hydraulic pump to operate so as to provide hydraulic driving force for the hydraulic station 16. The driving device control system adopts a load sensitive closed control loop, and automatically adjusts the hydraulic pressure of the hydraulic blowout preventer 15, the shear ram blowout preventer 22, the emergency hydraulic socket 18 and the hydraulic connector 22 in operation according to the actual load of the marine underwater coiled tubing equipment 300. The hydraulic station 16 can adopt an electrohydraulic control mode, and can be connected with an external electric control system for control and can also realize high-precision control operation. The hydraulic stations 16 may also be provided in two, mutually redundant, configurations.
The wellhead connector 200 is provided with an emergency hydraulic socket 18, and the emergency hydraulic socket 18 is used for realizing the functions of emergency disconnection, emergency shutdown and the like of the marine underwater coiled tubing equipment 300 by a hydraulic plug matched with the emergency hydraulic socket 18 of the wellhead device on the underwater robot through the underwater robot matched with the lowering engineering ship 29 under the condition that the ground control system cannot normally and normally use after the marine underwater coiled tubing equipment 300 is subjected to integral power failure.
The wellhead connector 200 is fixedly provided with a plurality of underwater cameras 14 outside for observing the external condition of the marine underwater coiled tubing equipment 300.
The following describes the specific construction steps in connection with fig. 1-4:
1. before the water is discharged, the coiled tubing 2 is extended from the coiled tubing roller 27 and inserted into the tubing injector head 100; the composite steel core cable 1 is connected to a marine underwater coiled tubing apparatus 300.
2. The main driving wheel 7 in the oil pipe injection head 100 is started to rotate, the main driving wheel 7 drives the auxiliary tensioning wheel 12 to rotate through the annular chain 8, the clamping device 9 and the bidirectional clamp 10 provide clamping force for the clamping blocks 11 on the annular chain 8, and the continuous oil pipe 2 is conveyed into the lubricator 17 in the wellhead connector 200 and then stopped to be conveyed along with the rotation of the annular chain 8, so that the continuous oil pipe 2 can be clamped in the marine underwater continuous oil pipe equipment 300 and is lowered into water along with the marine underwater continuous oil pipe equipment 300.
3. The marine subsea coiled tubing unit 300 is lowered into the water by lifting it up by a crane on the engineering vessel 29.
4. The marine underwater coiled tubing apparatus 300 is lowered into the water with both the composite steel core cable 1 and coiled tubing 2.
5. The underwater robot matched with the engineering ship 29 assists the marine underwater coiled tubing equipment 300 to approach the underwater wellhead 23, finally sits on the underwater wellhead, starts the hydraulic system of the wellhead connector 200, and the hydraulic connector 22 at the lower end of the wellhead connector 200 fixes the marine underwater coiled tubing equipment 300 on the wellhead.
6. The main driving wheel 7, the auxiliary tensioning wheel 12, the annular chain 8 and the clamping blocks 11 in the starting oil pipe injection head 100 form a continuous oil pipe clamping and lifting structure together, and the continuous oil pipe clamping and lifting structure conveys the continuous oil pipe 2 into a well to the bottom of the well.
7. The drilling, workover, testing, etc. operations are performed in conjunction with the coiled tubing downhole tool assembly 24 at the lowermost end of the coiled tubing 2.
The above-mentioned engineering ship 29 is matched with the marine underwater continuous oil pipe equipment 300 to arrange the main equipment for conveying the continuous oil pipe 2 in the marine underwater continuous oil pipe equipment 300, and then the marine underwater continuous oil pipe equipment 300 is fixed on an underwater wellhead, so that the existing deepwater platform with high cost and complex functions is required to be built on the sea surface. In addition, in the process of lowering the coiled tubing 2 close to the underwater wellhead head 23, the deepwater platform needs to rely on a heave compensation system for counteracting wave fluctuation so as to improve the accuracy of accurately reaching the underwater wellhead head 23 by the coiled tubing 2, and in addition, a marine riser or a drill rod is needed to guide and protect the coiled tubing 2 to reach the underwater wellhead head. However, the engineering ship 29 is matched with the marine underwater coiled tubing equipment 300, a heave compensation system, a marine riser and a drill rod are not needed, the underwater robot is utilized to seat on the underwater wellhead head 23 with the marine underwater coiled tubing equipment 300, the accurate lowering of the coiled tubing 2 into the underwater wellhead head 23 is also realized, the operation efficiency is improved, and the engineering cost is saved.
Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (3)
1. An ocean underwater coiled tubing apparatus, characterized by: the oil pipe injection head is connected with the upper end of the wellhead connector; the wellhead connector comprises a hydraulic connector, the hydraulic connector is fixedly arranged at the lower end of the wellhead connector, and the hydraulic connector is used for being fixedly connected with an underwater wellhead located in an operation area so as to enable marine underwater coiled tubing equipment to be fixedly arranged on the underwater wellhead; the coiled tubing injection head comprises a coiled tubing clamping and lifting structure, the coiled tubing clamping and lifting structure is fixedly arranged in the coiled tubing injection head, the coiled tubing clamping and lifting structure is used for clamping a coiled tubing which enters from the coiled tubing injection head and passes through a wellhead connector, so that the coiled tubing enters into an underwater wellhead under the clamping action of the coiled tubing clamping and lifting structure, the coiled tubing clamping and lifting structure comprises main driving wheels, auxiliary tensioning wheels and annular chains, each main driving wheel is arranged on the side edge of the coiled tubing, the auxiliary tensioning wheels correspond to the auxiliary tensioning wheels at the lower position of each main driving wheel, the main driving wheels and the auxiliary tensioning wheels are in transmission connection through the annular chains, a plurality of clamping blocks are arranged on the annular chains, the clamping blocks are used for clamping and lifting the coiled tubing, the coiled tubing clamping and lifting structure is further provided with a bidirectional clamp, the bidirectional clamp is fixedly arranged between the annular chains on the two sides of the coiled tubing, the left end of the bidirectional clamp is close to the annular chain of the coiled tubing, the right side of the bidirectional clamp is connected with the annular chain of the annular chain, the right side of the annular chain of the continuous tubing is close to the annular chain of the annular chain, so that clamping blocks on the two sides of the annular chain of the continuous tubing are close to each other to clamp the annular chain to each other, and the clamping device is further connected with the annular chain to the left end of the annular chain and the annular chain, and the clamping device is further connected with the annular chain, and the left end of the annular chain is far from the annular clamping device and the annular device is far from the annular clamping device;
the two sides of the lower end of the oil pipe injection head are provided with suspension weight sensors, and the suspension weight sensors are used for measuring load data of acting force generated by blocking the coiled tubing when the coiled tubing clamps the lifting structure and the coiled tubing is lifted out and lowered in, and transmitting the load data to a coiled tubing equipment control center on an engineering ship through a composite steel core cable;
the upper end of the wellhead connector is fixedly provided with a hydraulic blowout prevention box, the lower end of the oil pipe injection head is connected with the upper end of the wellhead connector through the hydraulic blowout prevention box, the continuous oil pipe sequentially penetrates through the oil pipe injection head, the hydraulic blowout prevention box and the wellhead connector, a rubber core is arranged in the hydraulic blowout prevention box, and the rubber core released from the hydraulic blowout prevention box is used for filling and sealing an annular space between the continuous oil pipe and the hydraulic blowout prevention box;
the lower end of the hydraulic blowout prevention box is fixedly connected with a blowout prevention pipe for accommodating the continuous oil pipe, the bottom of the blowout prevention pipe is fixedly connected with a hydraulic connector, the blowout prevention pipe is vertically arranged in a wellhead connector, the continuous oil pipe penetrating out of the wellhead connector penetrates through the blowout prevention pipe, and the blowout prevention pipe bears external high pressure to protect the continuous oil pipe accommodated therein;
the wellhead connector further comprises a shearing ram blowout preventer, the shearing ram blowout preventer is fixedly connected to the lower end of the lubricator and the upper end of the hydraulic connector, and the shearing ram blowout preventer is used for shearing a coiled tubing passing through the shearing ram blowout preventer and for sealing the lower end of the lubricator;
the inside of the wellhead connector is fixedly provided with a plurality of first-stage energy accumulators, the first-stage energy accumulators are connected with the shearing ram blowout preventer, high-pressure gas is stored in the first-stage energy accumulators, and the high-pressure gas is used for providing additional auxiliary power for the shearing ram blowout preventer;
the well head connector is also provided with an emergency hydraulic socket, the emergency hydraulic socket is used for realizing the emergency release and emergency shutdown functions of the marine underwater continuous oil pipe equipment in the emergency hydraulic socket of the well head connector by the underwater robot matched with the lowering engineering ship under the condition that the ground control system cannot be normally used after the marine underwater continuous oil pipe equipment is subjected to integral power failure.
2. Marine underwater coiled tubing apparatus as claimed in claim 1, wherein: the upper end of the oil pipe injection head is provided with a top support, the top support is used for fixedly connecting a composite steel core cable and bearing the weight of the whole marine underwater coiled oil pipe equipment, the lower end of the top support is connected with an outer frame of the oil pipe injection head, a coiled oil pipe clamping-up lower structure is fixedly connected in the outer frame, the outer frame is used for protecting the coiled oil pipe clamping-up lower structure from being impacted, and the lower end of the outer frame is connected with the upper end of a wellhead connector.
3. A method of using marine underwater coiled tubing apparatus as claimed in claim 1, comprising the steps of: step one: before launching, the coiled tubing extends out of a coiled tubing roller of the engineering ship and is inserted into an oil tube injection head; the composite steel core cable on the engineering ship is connected with marine underwater coiled tubing equipment; step two: starting a coiled tubing clamping and lifting structure in the tubing injection head, wherein the coiled tubing clamping and lifting structure is used for conveying the coiled tubing inserted into the tubing injection head in the first step into a wellhead connector, so that the coiled tubing is clamped in marine underwater coiled tubing equipment and is lowered into water along with the marine underwater coiled tubing equipment; step three: lifting marine underwater coiled tubing equipment to be launched into water by a crane on an engineering ship; step four: the marine underwater coiled tubing equipment simultaneously carries a composite steel core cable and a coiled tubing to be put into water; step five: the underwater robot matched with the engineering ship assists the marine underwater coiled tubing equipment to approach the underwater wellhead, finally sit on the underwater wellhead, and the hydraulic connector at the lower end of the wellhead connector fixes and sits the marine underwater coiled tubing equipment on the wellhead; step six: starting the coiled tubing clamping and lifting structure, and conveying the coiled tubing by the coiled tubing clamping and lifting structure, wherein the coiled tubing in the wellhead connector is conveyed to the bottom of the well by the coiled tubing clamping and lifting structure in the second step; step seven: and executing drilling, well repair and test operation contents by matching with a coiled tubing downhole tool assembly at the lowest end of the coiled tubing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110253054.9A CN113006717B (en) | 2021-03-02 | 2021-03-02 | Marine underwater coiled tubing equipment and method |
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| CN202110253054.9A CN113006717B (en) | 2021-03-02 | 2021-03-02 | Marine underwater coiled tubing equipment and method |
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| CN113530517B (en) * | 2021-09-17 | 2021-12-14 | 中煤科工集团西安研究院有限公司 | Combined segmented fracturing device, asynchronous two-way extraction system and method |
| CN114704216B (en) * | 2022-06-06 | 2022-09-06 | 山东威盟石油机械有限公司 | Coiled tubing operating system |
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