Coiled Tubing Sidetracking Composite Drilling Rig

Abstract

The present invention provides a coiled tubing sidetracking composite drilling rig, comprising: a main vehicle having a roller; an auxiliary vehicle equipped with a derrick, a lifting system, an injection head, and an injection head moving device; a well control device including a coiled tubing hanger and a blowout preventer, the coiled tubing hanger and the blowout preventer being connected to a wellhead; a drill floor assembly including a hydraulically driven turntable; a lifting system mounted on the derrick; an injection head moving device mounted on the derrick, the injection head moving device being capable of driving the injection head to move; when the injection head moves to the center of the wellhead, the injection head is capable of lowering the coiled tubing to the well bottom; and when the injection head deviates from the wellhead, the lifting system is capable of lifting the tubing string at the wellhead. The present invention alleviates the technical problem that coiled tubing sidetracking of old wells requires the coordination of a single-mode coiled tubing drilling rig and a workover rig, requiring equipment to be switched between during construction, and resulting in a relatively complex process.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, in particular to a continuous tubing sidetracking composite drilling rig. Background Art

[0002] As mature oil fields enter the middle and late stages of development, the number of low-yielding, shut-down, and abandoned wells is increasing. The average recovery rate in some mature oil fields is only around 30%. Sidetracking old wells can improve their recovery rates. Currently, conventional sidetracking is typically performed using conventional workover rigs, which results in high drilling costs, long well construction cycles, and significant environmental pressures.

[0003] Coiled tubing drilling is a safe, advanced, and effective new technology that effectively addresses reservoir contamination issues difficult to address with conventional drilling. It also simplifies operational processes, improves efficiency, shortens construction schedules, reduces risks, and saves costs. Coiled tubing drilling can be applied to unconventional oil and gas development, such as shale gas, coalbed methane, and tight oil and gas, and can also be used for sidetracking in older wells.

[0004] Sidetracking of old wells using coiled tubing primarily utilizes a single-mode coiled tubing rig in conjunction with a workover rig. The workover rig is used for pre-drilling wellbore preparation, post-drilling completions, and handling complex drilling conditions. The single-mode coiled tubing rig is used for window opening and directional drilling. The need to switch between equipment during drilling complicates the process, leading to high drilling costs, long drilling cycles, low operational efficiency, and limited application. Summary of the Invention

[0005] The purpose of the present invention is to provide a coiled tubing sidetracking composite drilling rig to alleviate the technical problem that sidetracking of old coiled tubing wells requires the use of a single-mode coiled tubing drilling rig and a workover rig to cooperate with each other, and during the construction process, the equipment needs to be switched with each other, resulting in a relatively complicated process.

[0006] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The present invention provides a continuous tubing sidetracking composite drilling rig, comprising:

[0008] a main car having rollers for carrying the coiled tubing;

[0009] Auxiliary vehicle, which is equipped with a derrick, a lifting system, an injection head and an injection head moving device;

[0010] A well control device comprising a coiled tubing hanger and a blowout preventer, wherein the coiled tubing hanger and the blowout preventer are sequentially connected to the wellhead from top to bottom;

[0011] a drill floor assembly including a hydraulically driven turntable;

[0012] The lifting system is installed on the derrick; the injection head moving device is installed on the derrick, and the injection head moving device can drive the injection head to move to the center of the wellhead or deviate from the wellhead;

[0013] When the injection head moves to the center of the wellhead, the roller can release the coiled tubing to the injection head, the injection head can lower the coiled tubing to the bottom of the well, and the hydraulically driven rotary table can drive the coiled tubing to rotate;

[0014] When the injection head deviates from the wellhead, the lifting system can perform a pipe string lifting operation on the wellhead.

[0015] In a preferred embodiment, the injection head moving device includes a basic base, a first mobile platform, a first sliding guide rail and a first hydraulic cylinder, and the injection head is installed on the first mobile platform; the basic base is fixed to the derrick, the first sliding guide rail is installed on the basic base along the first moving direction, the first mobile platform is installed on the first sliding guide rail, and the first hydraulic cylinder is connected to the first mobile platform for driving the first mobile platform to move along the first sliding guide rail.

[0016] In a preferred embodiment, the injection head moving device includes a second moving platform, a second sliding guide rail and a second hydraulic cylinder, and the injection head is installed on the second moving platform; the second sliding guide rail is installed on the first moving platform along a second moving direction, the second moving direction is perpendicular to the first moving direction, the second moving platform is installed on the second sliding guide rail, and the second hydraulic cylinder is connected to the second moving platform for driving the second moving platform to move along the second sliding guide rail.

[0017] In a preferred embodiment, the lifting system includes a main winch, a crown block, a wire rope and a traveling block hook. The crown block is installed on the top of the derrick, the main winch is installed on the auxiliary vehicle, the wire rope is connected to the main winch and the crown block respectively, the traveling block hook is connected to the wire rope, and the main winch drives the wire rope to operate, driving the traveling block hook to move up and down.

[0018] In a preferred embodiment, the main winch includes a first motor, a second motor, a parallel box and a main drum, the first motor and the second motor are connected to the main drum through the parallel box, and the wire rope is connected to the main drum.

[0019] In a preferred embodiment, the well control device includes a well control pipe, a first connecting pipe, and a second connecting pipe connected in sequence from bottom to top, the well control pipe is connected to the upper end of the coiled tubing hanger, the lower end of the first connecting pipe is detachably connected to the well control pipe, and the upper end of the first connecting pipe is detachably connected to the second connecting pipe.

[0020] In a preferred embodiment, the first connecting pipe includes at least two fan-shaped troughs, and at least two of the fan-shaped troughs can be spliced ​​into a pipe body; the upper end of the well control pipe is provided with a receiving slot, and at least two of the fan-shaped troughs are inserted into the receiving slot; the lower end of the second connecting pipe is provided with a retaining ring, and the upper ends of at least two of the fan-shaped troughs are hung on the retaining ring.

[0021] In a preferred embodiment, the drilling floor assembly includes a drilling floor body, the hydraulically driven turntable is installed on the upper portion of the drilling floor body, and the drilling floor body can be raised and lowered to adjust the height.

[0022] In a preferred embodiment, the continuous tubing side drilling composite drilling rig includes a driller's room skid, which includes a skid body, a driller's room and a driller's room lifting mechanism. The lower end of the driller's room lifting mechanism is fixed to the skid body, and the driller's room is installed at the upper end of the driller's room lifting mechanism. The driller's room lifting mechanism can be raised and lowered to adjust the height.

[0023] In a preferred embodiment, the lifting mechanism includes a first rotating rod and a second rotating rod that are cross-hinged, the lower end of the first rotating rod is hinged to the skid body, and the lower end of the second rotating rod is slidably hinged to the skid body; the continuous tubing side drilling composite drilling rig includes a mechanical locking mechanism, which is used to lock the height of the driller's room.

[0024] In a preferred embodiment, the mechanical locking mechanism includes a flip rod and a shift rod, the shift rod is fixed to the driller's room, the lower end of the flip rod is hinged to the skid body, and the flip rod can be flipped to its upper end to abut against the shift rod to support the driller's room.

[0025] The characteristics and advantages of the present invention are:

[0026] When using this coiled tubing sidetracking composite drilling rig for sidetracking old wells, during the window opening and directional drilling stages, the injection head moving device drives the injection head to the center of the wellhead, and the injection head is used to lower the coiled tubing and downhole tools to the bottom of the well for window opening and directional drilling.

[0027] During the pre-drilling wellbore treatment stage, the injection head moving device drives the injection head to move away from the wellhead, and the derrick and lifting system are used to raise and lower the drill pipe to perform wellbore treatment operations such as well cleaning and wall scraping.

[0028] In the post-drilling stage, the injection head moving device drives the injection head to move away from the wellhead, and the casing is lowered using the derrick and lifting system to complete the well.

[0029] During the drilling and completion process, if salvage is required, the injection head moving device drives the injection head to move away from the wellhead. The hydraulic drive turntable can be used to cooperate with the derrick and lifting system to lower the drill pipe for salvage.

[0030] This coiled tubing sidetracking composite drilling rig enables sidetracking of older wells, simplifying operational procedures, improving efficiency, shortening construction periods, reducing risks, and saving costs. During sidetracking of older wells, it can perform window opening and directional drilling, as well as pre-drilling wellbore preparation, post-drilling completion, and handling complex drilling conditions. This reduces equipment switching during operation, simplifies the process, and fully leverages the advantages of coiled tubing sidetracking, improving equipment adaptability and operational efficiency, while reducing sidetracking costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A side view of the coiled tubing sidetracking composite drilling rig provided by the present invention;

[0033] Figure 2 for Figure 1 The structural diagram of the main vehicle in the coiled tubing sidetracking composite drilling rig shown;

[0034] Figure 3 for Figure 1 The schematic diagram of the structure of the auxiliary vehicle in the coiled tubing sidetracking composite drilling rig is shown;

[0035] Figure 4 for Figure 3 A schematic structural diagram of the main winch in the auxiliary vehicle shown;

[0036] Figure 5a for Figure 1 A front view of an injection head moving device in a coiled tubing sidetracking composite drilling rig is shown;

[0037] Figure 5b for Figure 1 A side view of an injection head moving device in a coiled tubing sidetracking composite drilling rig is shown;

[0038] Figure 6 for Figure 1The structural diagram of the drill floor assembly in the coiled tubing sidetracking composite drilling rig is shown;

[0039] Figure 7a for Figure 1 The schematic diagram of the structure of the driller's room skid in the coiled tubing sidetracking composite drilling rig is shown;

[0040] Figure 7b for Figure 7a A local enlarged view of point A in FIG;

[0041] Figure 8 for Figure 1 The schematic diagram of the structure of the well control device in the coiled tubing sidetracking composite drilling rig is shown;

[0042] Figure 9 for Figure 8 A local enlarged view of point B in FIG.

[0043] Description of Figure Numbers:

[0044] 1. Main vehicle; 11. Main vehicle chassis; 12. Drum; 13. Coiled tubing;

[0045] 2. Auxiliary vehicle; 21. Auxiliary vehicle chassis; 22. Power system; 26. Guide; 28. Derrick;

[0046] 20. Hoisting system; 27. Traveling block hook; 29. ​​Wire rope; 210. Overhead crane; 23. Small winch;

[0047] 24. Main winch; 241. First motor; 243. Second motor; 244. Parallel box; 247. Main drum;

[0048] 242. Rotary encoder; 245. Coupling; 246. Hydraulic disc brake;

[0049] 25. Injection head;

[0050] 280, injection head moving device; 291, first moving direction; 292, front-back direction; 293, second moving direction;

[0051] 281. Basic base; 282. First sliding guide rail; 283. First hydraulic cylinder; 284. First mobile platform;

[0052] 285, second sliding guide rail; 286, second hydraulic cylinder; 287, second mobile platform;

[0053] 3. Drilling platform assembly; 32. Drilling platform body; 321. Support column; 322. Support pipe; 323. Latch; 37. Hydraulically driven turntable;

[0054] 31. Wellhead foundation; 33. Long ladder; 34. First short ladder; 35. Right floating platform; 36. Rear floating platform; 38. Left floating platform; 39. Escape chute; 310. Second short ladder; 311. Ramp; 312. BOP transfer device;

[0055] 4. Driller's room skid; 41. Skid body; 45. Driller's room; 44. Front floating platform; 46. Telescopic ladder; 47. Tool room;

[0056] 42. Driller's room lifting mechanism; 421. First rotating rod; 422. Second rotating rod; 423. Driller's room hydraulic cylinder;

[0057] 43. Mechanical locking mechanism; 433. Flip lever; 434. Shift lever; 431. Mounting base; 432. Hydraulic cylinder of the mechanical locking mechanism;

[0058] 5. Well control device; 52. Blowout preventer; 522. Double-ram blowout preventer; 53. Coiled tubing hanger;

[0059] 51. Four-way;

[0060] 50. Well control pipe; 54. Adapter; 55. First lubricant preventer; 56. Mud guide pipe; 57. Second lubricant preventer; 571. Connecting slot;

[0061] 510, mud scraper;

[0062] 58. First connecting pipe; 581. Fan-shaped slot; 582. Bolt; 583. Hanging cavity; 584. Hanging protrusion;

[0063] 59. Second connecting pipe; 591. Retaining ring;

[0064] 61. Drilling floor; 62. Mud return port; 63. Slurry injection port; 64. Casing head; 65. Ground level. DETAILED DESCRIPTION

[0065] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0066] The present invention provides a continuous tubing sidetracking composite drilling rig, such as Figure 1 、 Figure 3 、 Figure 5a and Figure 5bAs shown, the coiled tubing sidetracking composite drilling rig comprises: a main vehicle 1, an auxiliary vehicle 2, a well control device 5 and a drilling floor assembly 3; the main vehicle 1 has a roller 12 for carrying the coiled tubing 13; the auxiliary vehicle 2 is provided with a derrick 28, a lifting system 20, an injection head 25 and an injection head moving device 280; the well control device 5 comprises a coiled tubing hanger 53 and a blowout preventer 52, which are sequentially connected to the wellhead from top to bottom; the drilling floor assembly 3 comprises a hydraulically driven turntable 37; the lifting system 20 is installed at the wellhead The derrick 28 is provided with an injection head moving device 280, which is installed on the derrick 28. The injection head moving device 280 can drive the injection head 25 to move to the center of the wellhead or away from the wellhead. When the injection head 25 moves to the center of the wellhead, the drum 12 can release the coiled tubing 13 to the injection head 25. The injection head 25 can lower the coiled tubing 13 to the bottom of the well, and the hydraulically driven turntable 37 can drive the coiled tubing 13 to rotate. When the injection head 25 deviates from the wellhead, the lifting system 20 can perform a tubing string lifting operation at the wellhead.

[0067] When using the coiled tubing sidetracking composite drilling rig to sidetrack an old well, during the window opening and directional drilling stages, the injection head moving device 280 drives the injection head 25 to the center of the wellhead, and the injection head 25 is used to lower the coiled tubing 13 and downhole tools to the bottom of the well to perform window opening and directional drilling.

[0068] During the pre-drilling wellbore processing stage, the injection head moving device 280 drives the injection head 25 to move away from the wellhead, and uses the derrick 28 and the lifting system 20 to raise and lower the drill pipe to perform wellbore processing operations such as well cleaning and wall scraping.

[0069] In the post-drilling stage, the injection head moving device 280 drives the injection head 25 to move away from the wellhead, and the casing is lowered using the derrick 28 and the lifting system 20 to perform completion operations.

[0070] During the drilling and completion process, if salvage is required, the injection head moving device 280 drives the injection head 25 to move away from the wellhead. The hydraulic drive turntable 37 can be used to cooperate with the derrick 28 and the lifting system 20 to lower the drill pipe for salvage, which is convenient for handling complex working conditions.

[0071] This coiled tubing sidetracking composite drilling rig enables sidetracking of older wells, simplifying operational procedures, improving efficiency, shortening construction periods, reducing risks, and saving costs. During sidetracking of older wells, it can perform window opening and directional drilling, as well as pre-drilling wellbore preparation, post-drilling completion, and handling complex drilling conditions. This reduces equipment switching during operation, simplifies the process, and fully leverages the advantages of coiled tubing sidetracking, improving equipment adaptability and operational efficiency, while reducing sidetracking costs.

[0072] like Figure 5a and Figure 5bAs shown, the injection head moving device 280 includes a base 281, a first moving platform 284, a first sliding guide rail 282 and a first hydraulic cylinder 283. The injection head 25 is installed on the first moving platform 284; the base 281 is fixed to the derrick 28, the first sliding guide rail 282 is installed on the base 281 along the first moving direction 291, the first moving platform 284 is installed on the first sliding guide rail 282, and the first hydraulic cylinder 283 is connected to the first moving platform 284 to drive the first moving platform 284 to move along the first sliding guide rail 282. The first moving direction 291 is horizontal. Figure 1 The front and rear directions 292 are shown. Specifically, the basic base 281 can be welded and fixed on the derrick 28 thigh.

[0073] Specifically, the injector head 25 lowers the coiled tubing 13 to the bottom of the well, and the hydraulically driven rotary table 37 rotates the coiled tubing 13 to perform window openings in the old well and sidetrack drilling, implementing coiled tubing drilling. The hoisting system 20 performs tubing string hoisting operations at the wellhead, including raising and lowering the tubing string in the wellbore, running the liner for completion operations, and handling drilling incidents. The forward and backward movement of the injector head 25 on the platform enables rapid and seamless transition between coiled tubing drilling and conventional tubing string hoisting operations, enabling a single system to perform the entire sidetracking process, improving operational efficiency, shortening drilling cycles, and reducing sidetracking costs.

[0074] Furthermore, the injection head moving device 280 includes a second moving platform 287, a second sliding guide rail 285 and a second hydraulic cylinder 286. The injection head 25 is mounted on the second moving platform 287. The second sliding guide rail 285 is mounted on the first moving platform 284 along the second moving direction 293. The second moving direction 293 is perpendicular to the first moving direction 291. The second moving platform 287 is mounted on the second sliding guide rail 285. The second hydraulic cylinder 286 is connected to the second moving platform 287 and is used to drive the second moving platform 287 to move along the second sliding guide rail 285. The second moving direction 293 is horizontal, and the second moving direction 293 is specifically perpendicular to the first moving direction 291. Figure 1 The second movable platform 287, the second sliding guide rail 285 and the second hydraulic cylinder 286 are used to fine-tune the injection head 25 on the platform.

[0075] like Figure 3 As shown, the lifting system 20 includes a main winch 24, a crown block 210, a wire rope 29 and a traveling block hook 27. The crown block 210 is installed on the top of the derrick 28, the main winch 24 is installed on the auxiliary vehicle 2, the wire rope 29 is connected to the main winch 24 and the crown block 210 respectively, and the traveling block hook 27 is connected to the wire rope 29. The main winch 24 drives the wire rope 29 to wind around the drum of the main winch 24, driving the traveling block hook 27 to move up and down.

[0076] like Figure 4 As shown, the main winch 24 includes a first motor 241, a second motor 243, a parallel car box 244 and a main drum 247. The first motor 241 and the second motor 243 are connected to the main drum 247 through the parallel car box 244. The wire rope 29 is connected to the main drum 247. The main drum 247 rotates to drive the wire rope 29 to operate.

[0077] The first motor 241 and the second motor 243 are driven in parallel via a paralleling box 244. During high-speed operation, the first motor 241 is used alone for driving; during low-speed, high-torque operation, the first motor 241 and the second motor 243 are driven simultaneously. The switch between high-speed and low-speed, high-torque operation can be controlled by a freewheel valve. Specifically, the paralleling box 244 is connected to the hydraulic disc brake 246 and the main drum 247 via a coupling 245. Braking is performed using the hydraulic disc brake 246, which is preferably cooled by natural air. The rotational speed of the main winch 24 is measured by a rotary encoder 242 mounted on the shaft head of the second motor 243.

[0078] like Figure 3 As shown, the auxiliary vehicle 2 includes an auxiliary vehicle chassis 21 and a power system 22. The lifting system 20 also includes a small winch 23, which can be used to lift auxiliary tools, etc. The derrick 28 can be a two-stage telescopic frame derrick, fixed by six guy ropes, hydraulically lifted and hydraulically retracted, and locked using a hydraulically driven plug-in mechanism. The position of the plug-in can be detected by a travel switch. Figure 1 and Figure 3 As shown, the auxiliary vehicle 2 includes a guide 26 , which plays a guiding role and is used to guide the continuous tube 13 released from the drum 12 to move toward the injection head 25 .

[0079] A blowout preventer 52 and a coiled tubing hanger 53 are connected to the upper end of the casing head. The blowout preventer 52 is used to close the wellhead in the event of an overflow or blowout. The coiled tubing hanger 53 is mounted above the blowout preventer 52 to suspend the coiled tubing in the well when necessary. The blowout preventer 52 is preferably a double-ram blowout preventer 522, which has both full and partial sealing capabilities.

[0080] During coiled tubing drilling, the well control device 5 connects the casing head and the injection head 25 together. The well control device 5 includes a well control pipe 50, which is connected to the upper end of the coiled tubing hanger 53. The well control pipe 50 may include a conversion joint 54, a first blowout preventer 55, a mud conduit 56, and a second blowout preventer 57. A mud scraper 510 is connected to the upper end of the well control pipe 50. The blowout preventer 52 and the casing head 64 are connected via a spool 51, which is used to connect the well kill manifold and the choke manifold. Figure 8As shown, the spool 51 is located above the ground level 65, and the spool 51, blowout preventer 52, coiled tubing hanger 53, transition joint 54, first lubricant preventer 55, mud conduit 56, second lubricant preventer 57, and mud scraper 510 are connected in sequence from bottom to top. Figure 8 As shown, the mud conduit 56 is provided with a mud return port 62 and a mud injection port 63 .

[0081] like Figure 8 and Figure 9 As shown, the well control device 5 includes a first connecting pipe 58 and a second connecting pipe 59. The well control pipe 50, the first connecting pipe 58, and the second connecting pipe 59 are connected in sequence from bottom to top. The well control pipe 50 is connected to the upper end of the coiled tubing hanger 53. The lower end of the first connecting pipe 58 is detachably connected to the well control pipe 50, and the upper end of the first connecting pipe 58 is detachably connected to the second connecting pipe 59. The mud scraper 510 is connected to the upper end of the second connecting pipe 59. Removing the first connecting pipe 58 facilitates installation of downhole tools and connection to the wellhead. Preferably, the first connecting pipe 58 is located above the drill floor 61.

[0082] Furthermore, the first connecting pipe 58 includes at least two fan-shaped slots 581, which can be spliced ​​into a pipe body; the upper end of the well control pipe 50 is provided with a receiving slot 571, and the at least two fan-shaped slots 581 are plugged into the receiving slot 571; the lower end of the second connecting pipe is provided with a retaining ring 591, and the upper ends of the at least two fan-shaped slots 581 are hung on the retaining ring 591. Figure 9 As shown, each fan-shaped trough body 581 is inserted into the receiving slot 571, and the upper end of each fan-shaped trough body 581 is hung on the retaining ring 591. The fan-shaped trough bodies 581 are spliced ​​together and locked, so that the fan-shaped trough bodies 581 can be spliced ​​into a tube body, and the upper end is locked with the second connecting pipe, and the lower end is supported and positioned by the second blowout preventer.

[0083] Specifically, two adjacent fan-shaped troughs 581 can be locked together using bolts 582. A mounting cavity 583 is provided at the upper end of the fan-shaped trough 581, and a mounting protrusion 584 is provided at the upper portion of the mounting cavity 583. The lower end of the second connecting end can extend into the mounting cavity 583. When the fan-shaped troughs 581 are spliced ​​together, the mounting protrusion 584 is mounted on the upper surface of the retaining ring 591, thereby connecting the first connecting pipe to the second connecting pipe. The first and second connecting pipes allow for slight adjustments in the installation dimensions, as well as for stabilizing the coiled tubing 13 during sidetracking. Preferably, the first connecting pipe 58 comprises two fan-shaped troughs 581, and the first connecting pipe 58 is a two-half structure for ease of assembly.

[0084] like Figure 6As shown, the drilling floor assembly 3 includes a drilling floor body 32, with a hydraulically driven turntable 37 mounted on the upper portion of the drilling floor body 32. The drilling floor body 32 can be raised and lowered to adjust its height. The drilling floor body 32 can be raised to a higher height during operation and lowered to a lower height during transportation to save space and facilitate transportation. Specifically, the drilling floor body 32 includes a support column 321 and a support tube 322 connected to the upper end of the support column 321. The support tube 322 is sleeved outside the support column 321 and can slide up and down along the support column 321. A latch 323 is connected to the support tube 322 to mechanically lock the support column 321 and the support tube 322.

[0085] The lower part of the drilling platform body 32 is connected to the wellhead foundation 31 and the ship-shaped base; the upper part is provided with a turntable beam, and the hydraulic drive turntable 37 is installed on the turntable beam. Figure 6 As shown, the drilling floor assembly 3 also includes a long ladder 33, a first short ladder 34, a right floating platform 35, a rear floating platform 36, a left floating platform 38, an escape slide 39, a second short ladder 310, a ramp 311 and a blowout preventer transfer device 312. The blowout preventer transfer device 312 is installed on the side of the drilling floor body 32 and is used to transfer the blowout preventer during equipment installation and removal; the right floating platform 35, the rear floating platform 36, and the left floating platform 38 adopt a flip-up structure to facilitate transportation.

[0086] In one embodiment of the present invention, the coiled tubing sidetracking rig includes a driller's house skid 4, which comprises a skid body 41, a driller's house 45, and a driller's house lifting mechanism 42. The lower end of the driller's house lifting mechanism 42 is fixed to the skid body 41, and the driller's house 45 is mounted on the upper end of the driller's house lifting mechanism 42. The driller's house lifting mechanism 42 can be raised and lowered to adjust its height. During operation, the driller's house lifting mechanism 42 raises the base of the driller's house 45 to the same level as the drill floor 61. During transport, the driller's house lifting mechanism 42 retracts to lower the driller's house 45 for easier transportation. The driller's house 45 can utilize integrated electromechanical and hydraulic control, centralizing all operations of the coiled tubing sidetracking rig in the driller's house, facilitating and simplifying the control process.

[0087] Furthermore, the driller's room lifting mechanism 42 includes a first rotating rod 421 and a second rotating rod 422 that are cross-hinged. The lower end of the first rotating rod 421 is hinged to the skid 41, and the lower end of the second rotating rod 422 is slidably hinged to the skid 41. The continuous tubing sidetracking composite drilling rig includes a mechanical locking mechanism 43, which is used to lock the height of the driller's room 45. Figure 7aAs shown, the driller's cabin lifting mechanism 42 utilizes a scissor-type structure. By relative rotation of a first rotating rod 421 and a second rotating rod 422, the height of the upper ends of the first rotating rod 421 and the second rotating rod 422 can be adjusted, thereby adjusting the height of the driller's cabin 45. The driller's cabin 45 is a separate skid, and the driller's cabin lifting mechanism 42 can utilize hydraulic lifting. Specifically, the driller's cabin lifting mechanism 42 includes a driller's cabin hydraulic cylinder 423, one end of which is hinged to the skid body and the other end is hinged to the first rotating rod 421. The telescopic movement of the driller's cabin hydraulic cylinder 423 drives the relative rotation of the first rotating rod 421 and the second rotating rod 422.

[0088] After the driller room lifting mechanism 42 is lifted and lowered into position, it is locked by a mechanical locking mechanism 43. Figure 7a and Figure 7b As shown, the mechanical locking mechanism 43 includes a flip rod 433 and a shift rod 434. The shift rod 434 is fixed to the driller's room 45. The lower end of the flip rod 433 is hinged to the sled body 41. The flip rod 433 can be flipped to its upper end to abut against the shift rod 434 to support the driller's room 45.

[0089] Furthermore, the flip rod 433 is hydraulically controlled to flip, and the mechanical locking mechanism 43 includes a mounting seat 431 and a mechanical locking mechanism hydraulic cylinder 432. Figure 7a and Figure 7b As shown, the mounting base 431 is mounted on the skid body 41, and one end of the mechanical locking mechanism hydraulic cylinder 432 is hinged to the mounting base 431, and the other end is hinged to the flip rod 433. Before the driller's room 45 is raised, the hydraulic reversing valve connected to the mechanical locking mechanism hydraulic cylinder 432 is used to control the mechanical locking mechanism hydraulic cylinder 432 to extend, so that the flip rod 433 is first flipped to a vertical state and located outside the driller's room 45, leaving space for the driller's room 45 to move up and down; after the driller's room 45 is raised to a higher position, as shown in FIG. Figure 7b As shown, the hydraulic cylinder 432 of the mechanical locking mechanism is controlled to contract, causing the tilting rod 433 to tilt inward to a tilted position, so that the upper end of the tilting rod 433 abuts the shift rod to support the driller's housing 45. Preferably, a slot is provided at the upper end of the tilting rod 433. When the driller's housing 45 is raised to its highest position and the shift rod 434 is aligned with the slot, the driller's housing 45 is lowered, allowing the shift rod 434 to fall into the slot, thereby improving the stability of the connection.

[0090] like Figure 7aAs shown, the driller's cabin skid 4 includes a front platform 44, a telescopic ladder 46, and a tool shed 47. The front platform 44 is located in front of the driller's cabin 45 and is connected to the drilling floor 61 via the front platform 44. The front platform 44 can be hydraulically tilted. A telescopic ladder 46 is located at the entrance of the driller's cabin 45. After the driller's cabin 45 is raised and lowered into position, the telescopic ladder 46 is pulled out and used to enter the driller's cabin 45. The driller's cabin 45 and the tool shed 47 are integrated into one.

[0091] In one embodiment of the present invention, the main vehicle 1 includes a main vehicle chassis 11, such as Figure 2 As shown, the coiled tubing 13 is wound around a drum 12. The main vehicle chassis 11 is a frame-type chassis, while the drum 12 is a sunken drum, maximizing the capacity of the drum 12. The main vehicle 1 has a frame-type structure without a drive shaft at the bottom of the frame; the drum 12 is a sunken structure, connected to the main vehicle chassis 11 by columns. Preferably, the main vehicle chassis 11 has a rear-mounted engine and three rear axles.

[0092] The above descriptions are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A coiled tubing sidetracking composite drilling rig, characterized in that: include: a main car having rollers for carrying the coiled tubing; Auxiliary vehicle, which is equipped with a derrick, a lifting system, an injection head and an injection head moving device; A well control device comprising a coiled tubing hanger and a blowout preventer, wherein the coiled tubing hanger and the blowout preventer are sequentially connected to the wellhead from top to bottom; a drill floor assembly including a hydraulically driven turntable; The lifting system is installed on the derrick; the injection head moving device is installed on the derrick, and the injection head moving device can drive the injection head to move to the center of the wellhead or deviate from the wellhead; When the injection head moves to the center of the wellhead, the roller can release the coiled tubing to the injection head, the injection head can lower the coiled tubing to the bottom of the well, and the hydraulically driven rotary table can drive the coiled tubing to rotate; When the injection head deviates from the wellhead, the lifting system can perform a pipe string lifting operation on the wellhead; The well control device includes a well control pipe, a first connecting pipe, and a second connecting pipe connected in sequence from bottom to top, wherein the well control pipe is connected to the upper end of the coiled tubing hanger, the lower end of the first connecting pipe is detachably connected to the well control pipe, and the upper end of the first connecting pipe is detachably connected to the second connecting pipe; The first connecting pipe includes at least two fan-shaped troughs, which can be spliced ​​into a pipe body; the upper end of the well control pipe is provided with a receiving slot, and the at least two fan-shaped troughs are inserted into the receiving slot; the lower end of the second connecting pipe is provided with a retaining ring, and the upper ends of the at least two fan-shaped troughs are hung on the retaining ring; The coiled tubing sidetracking composite drilling rig includes a driller's house skid, which includes a skid body, a driller's house, and a driller's house lifting mechanism. The lower end of the driller's house lifting mechanism is fixed to the skid body, and the driller's house is installed at the upper end of the driller's house lifting mechanism. The driller's house lifting mechanism can be raised and lowered to adjust the height. The lifting mechanism includes a first rotating rod and a second rotating rod that are cross-hinged, the lower end of the first rotating rod is hinged to the sled body, and the lower end of the second rotating rod is slidably hinged to the sled body; The coiled tubing sidetracking composite drilling rig includes a mechanical locking mechanism, which is used to lock the height of the driller's room.

2. The coiled tubing sidetracking composite drilling rig according to claim 1, characterized in that: The injection head moving device includes a basic base, a first moving platform, a first sliding guide rail and a first hydraulic cylinder, and the injection head is installed on the first moving platform; The basic base is fixed to the derrick, the first sliding guide rail is installed on the basic base along a first moving direction, the first mobile platform is installed on the first sliding guide rail, and the first hydraulic cylinder is connected to the first mobile platform for driving the first mobile platform to move along the first sliding guide rail.

3. The coiled tubing sidetracking composite drilling rig according to claim 2, characterized in that: The injection head moving device includes a second moving platform, a second sliding guide rail and a second hydraulic cylinder, and the injection head is installed on the second moving platform; The second sliding guide rail is installed on the first moving platform along a second moving direction, the second moving direction is perpendicular to the first moving direction, the second moving platform is installed on the second sliding guide rail, and the second hydraulic cylinder is connected to the second moving platform for driving the second moving platform to move along the second sliding guide rail.

4. The coiled tubing sidetracking composite drilling rig according to claim 1, characterized in that: The lifting system includes a main winch, a crown block, a wire rope and a traveling block hook. The crown block is installed on the top of the derrick, the main winch is installed on the auxiliary vehicle, the wire rope is connected to the main winch and the crown block respectively, and the traveling block hook is connected to the wire rope. The main winch drives the wire rope to operate, driving the traveling block hook to move up and down.

5. The coiled tubing sidetracking composite drilling rig according to claim 4, characterized in that: The main winch includes a first motor, a second motor, a parallel car box and a main drum. The first motor and the second motor are connected to the main drum through the parallel car box, and the wire rope is connected to the main drum.

6. The coiled tubing sidetracking composite drilling rig according to claim 1, characterized in that: The drilling floor assembly includes a drilling floor body, the hydraulic drive turntable is installed on the upper part of the drilling floor body, and the drilling floor body can be raised and lowered to adjust the height.

7. The coiled tubing sidetracking composite drilling rig according to claim 1, characterized in that: The mechanical locking mechanism includes a flip rod and a shift rod, the shift rod is fixed to the driller's room, the lower end of the flip rod is hinged to the skid body, and the flip rod can be flipped to its upper end abutting against the shift rod to support the driller's room.

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