Overall installation method of derrick

Abstract

The invention relates to an integral mounting method of a derrick, which comprises the following steps of: lifting by adopting a segmented lifting mode, and firstly, integrally hoisting a derrick base to a drill floor; then the mounted derrick section IV and the crown block are integrally hoisted into a guide rail in a derrick base, and a lock pin device is locked; then the unfolded derrick section is hung on a hook of a front leg of the derrick section IV according to the section III, the derrick is straightened through a puffer on a drill floor face, and a pin shaft penetrates through the derrick; a movable pulley below the lifting pulley is hung on a hanging point below the derrick section III, and the lifting puffer is operated to lift the derrick; lifting the section I and the section II according to a section III mode; and finally, accessories such as a racking platform are installed, and lifting is completed. The derrick base section is provided with a special mounting platform to ensure quick mounting, and each section of the derrick is provided with an auxiliary unfolding device to ensure quick and safe unfolding of each section; the front legs adopt hooks to assist in mounting, and rapid butt joint of derrick thighs is reduced; a lifting point is arranged on the gravity center of the derrick section, so that stable lifting of the derrick is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of oil and gas drilling, and in particular to an integral installation method of a derrick. Background Art

[0002] In the field of oil and gas drilling, compared with the rotary K-type derrick, the vertical lifting derrick has a smaller footprint, a compact structure, and low transportation size and cost. It is especially suitable for mountainous environments with limited size, hilly areas with complex terrain, and densely populated areas with high land use costs.

[0003] The modular design, modular transportation, and key components of the overall installation method of the derrick, including rapid assembly and disassembly of modules, are of great significance for reducing the number of derrick transportation modules and improving the efficiency of integrated transportation and disassembly and installation.

[0004] A vertical lifting drilling rig and installation method are disclosed: the derrick includes a derrick base section and multiple derrick unit sections, the derrick base section is provided with a lifting device, the lifting device includes a lifting cylinder and a lifting bracket, the piston head of the lifting cylinder can be fixedly connected to the lifting bracket, the lifting bracket is used to place the derrick unit section, at least two derrick unit sections are vertically lifted and lowered by the lifting device, the base is provided with a horizontal push device, the horizontal push device includes a pulley and a slide rail, the pulley is used to place the derrick unit section, the pulley can slide along the slide rail, at least two derrick unit sections are horizontally moved to the center of the wellbore by the horizontal push device. The existing problems are: 1. The structure needs to set a guide rail on the drilling table, and the flatness of the guide rail is high, and the ground is required to be high; 2. There is a risk of overturning when the derrick moves on the slide rail; 3. The position of the upper and lower sections of the derrick needs to be very precise when docking. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an overall installation method of a derrick, which can avoid the risk of overturning of the derrick section during installation and improve the efficiency of derrick installation.

[0006] The technical solution adopted by the present invention is: a method for installing a derrick as a whole, characterized in that the derrick structure is lifted in sections, specifically comprising the following steps:

[0007] S1. Assembly of base section: assembling the base section using the derrick base section installation platform;

[0008] S2. The main body of the derrick, sections I, II and III are unfolded. Sections I, II and III are folded / unfolded using auxiliary tooling;

[0009] S3, remove the protective boots of sections I, II and III;

[0010] S4. Install the adjusting support assembly;

[0011] S5, installing the base section;

[0012] S6. Install the introduction bracket according to the introduction bracket diagram;

[0013] S7. Install and adjust the lifting device;

[0014] S8, derrick hoisting, hoist the installed derrick section IV and the overhead travelling crane as a whole into the guide rail of the derrick base section, and lock the locking pin device; then hang the unfolded derrick section on the hook of the front leg of derrick section IV according to section III, use the small winch on the drilling table to straighten the derrick, and put the pin shaft through; then hang the movable pulley under the lifting pulley to the hanging point under section III of the derrick, operate the lifting small winch, and lift sections IV and III of the derrick as a whole; then lift sections I and II in the same way as section III; finally install the second-floor platform to complete the overall lifting of the derrick.

[0015] Preferably, the derrick structure includes a derrick body, a second-floor platform, a lifting device, a cage ladder platform assembly and an adjustable support assembly. The derrick body includes section IV, section III, section II, section I and a base section arranged in sequence from top to bottom. Section IV is an integral welded structure with detachable guide rails on both sides; section I, section II and section III are foldable structures, and adjacent sections are connected by pins; the lifting device is arranged on the base section, and two hydraulic winches are used to lift each section to a working position through wire ropes and pulleys in the order of section IV, section III, section II and section I; the second-floor platform is installed between section I and the base section; the cage ladder platform assembly includes two sets of ladder systems, and the ladders on both sides start from the drilling table and can reach the second-floor platform and the overhead traveling crane platform; the adjustable support assembly is located at the bottom of the derrick to ensure that the center of the derrick overhead traveling crane is aligned with the center of the wellhead.

[0016] Preferably, in step S1, the specific steps of assembling the base segment are:

[0017] S11, assembling the derrick base section installation platform;

[0018] S12, the left and right pieces of the derrick base section are hoisted onto the derrick base section installation platform in sequence and connected with tie rods;

[0019] S13, install lifeline;

[0020] S14, install the top platform of the base section and the base section ladder;

[0021] S15 installation base section platforms, base ladders, lifting fixed pulley blocks, after the first installation, transported with the derrick as a single piece;

[0022] S16, Turn over the derrick base section: Remove the process inclined rods, turn over the derrick base section and stand it on the ground.

[0023] Preferably, in step S5, the specific steps of installing the base segment are:

[0024] S51. Use a crane to hoist the turned base section to the derrick mounting support on the drilling floor, align the pin holes, and connect them using a pin shaft;

[0025] S52. Adjust the base section by adding or removing the pads to make the rear column with the guide wheel on the base section perpendicular to the horizontal plane with a non-perpendicularity of less than 3mm. At the same time, ensure that the difference in the center diagonals of the four latch plate holes is less than 5mm.

[0026] Preferably, in step S6, after the bracket is installed, the left and right guide rails should be measured to be on the same horizontal plane, with a non-planarity less than 5 mm.

[0027] Preferably, in step S6, the specific steps of installing and adjusting the lifting device are:

[0028] S61. Install the hydraulic system of the lifting device, install the operating box assembly on the drilling platform, connect the hydraulic pipeline joints and connect them to the drilling platform hydraulic main station;

[0029] S62, add hydraulic oil;

[0030] S63, start the hydraulic system;

[0031] S64, adjust the pressure of the hydraulic system;

[0032] S65. Install the lifting rope.

[0033] Preferably, in step S8, the specific steps of lifting the derrick are:

[0034] S81, hoisting IV section and overhead crane;

[0035] S811, operate the lock pin block to put it in the open position;

[0036] S812, turn over the derrick section IV and the overhead crane;

[0037] S813, vertically hoist the IV section together with the overhead crane into the base section of the derrick, so that the guide rail is guided to the guide wheel;

[0038] S814, the crane continues to slowly lift the derrick section IV;

[0039] S815, operate the lifting limit device to place the lifting limit device in the over-lifting prevention position to avoid over-lifting;

[0040] S816, when the lock pin block is lifted to contact with the lifting limit device, the lock pin is operated to work;

[0041] S817, lower the crane and section IV, so that the limit block of section IV of the derrick is pressed on the locking pin block;

[0042] S818, operate the lifting limit device to place the lifting limit device in the anti-slip position of the derrick to prevent the main body of the derrick from slipping upward;

[0043] S819, operate the hydraulic winch control box to lower the lifting pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting pulley block with the single-ear plates on both sides of the bottom of the derrick section IV, insert the pin shaft and align the position;

[0044] S82, introduce section III and lift section IV

[0045] S821. Lift the derrick section III horizontally onto the lead-in bracket, ensure that the derrick section III is aligned with the guide rail, and the rotating shaft connected to the hook is on the hook path; connect the auxiliary guide chain of the hydraulic winch on the drilling floor to the derrick section III;

[0046] S822, operate the lifting limit device to place the lifting limit device in the fully open position;

[0047] S823, lift the derrick section IV, and at the same time operate the control box handle to the lifting position. At this time, the two winches will lift the derrick synchronously. During the lifting process, the driller must observe the instrument on the operating table and the upper and lower gaps between the derrick and the guide rail to determine whether the derrick is lifted synchronously. If a large synchronization error occurs, the lifting speed of the left and right sides should be adjusted in time to make it lift synchronously. Operate the lock pin block to open it to avoid interference between the lock pin block and the main components of each section during the subsequent lifting process.

[0048] S824, when lifting the derrick section IV, the section III rotating shaft is hung on the front end hook of the derrick section IV;

[0049] S825. The crane only hangs the two lifting points at the lower part of the middle section. When lifting the derrick section IV, section III should be out of contact with the track surface of the lead-in bracket;

[0050] S826, continue to lift the derrick section IV, and use the guide chain to assist in pulling the derrick toward the winch side, so that the derrick section III slowly approaches verticality; at the same time, the personnel on the lock pin platform observe that when the side column in the middle of the derrick body passes the lock pin platform, operate the lifting limit device to put it in the anti-overlifting position;

[0051] S827, when the lock pin block is lifted to contact with the lifting limit device, operate the lock pin to the working position;

[0052] S828. Simultaneously operate the control box handle to the lowering position. At this time, the two winches lower the IV section synchronously, so that the limit block below the IV section of the derrick is pressed on the lock pin block. During the lowering process, the driller must observe the instrument on the operating table and the upper and lower gaps between the derrick and the guide rail to determine whether the derrick is lowered synchronously. If a large synchronization error occurs, the lowering speed of the left and right sides should be adjusted in time to ensure synchronous lowering.

[0053] S829, operate the lifting limit device to place it in the anti-slip position of the derrick to prevent the main body of the derrick from slipping upward;

[0054] S8210, insert the front leg pin and the rear leg pin into the pin holes of the connecting ear plates of the two sections of the derrick;

[0055] S8211, remove the cage ladder guard cage fixing pin;

[0056] S8212. Remove the connection between the lifting pulley block and section IV, operate the hydraulic winch control box to lower the lifting pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting pulley block with the single-ear plates on both sides of the bottom of section III of the derrick, and put on the pin shaft;

[0057] S83, introduce section II and lift section III, the method is the same as S82

[0058] S84, introduce section I and lift section II, the method is the same as S82

[0059] S85, Lifting Section I

[0060] S851. Remove the connection between the lifting movable pulley block and section II, operate the hydraulic winch control box to lower the lifting movable pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting movable pulley block with the single-ear plates on both sides of the bottom of section I of the derrick, and put on the pin shaft;

[0061] S852, repeat the operations of S822-S823 to lift the derrick section I;

[0062] S853, when the locking pin block is lifted to about 300 mm past the preset stop point, operate the locking pin to the working position, repeat the operation of S828, and stop the derrick section I at one of the two preset stop points on the derrick;

[0063] S854, install the second floor platform;

[0064] S855, lift to the position, repeat S822-S823 to continue lifting the derrick section I. At the same time, the personnel on the locking platform observe that when the side column in the middle of the derrick body passes the locking platform, operate the lifting limit device to put it in the anti-overlifting position; repeat S827-S829 to complete the lifting of the derrick.

[0065] The beneficial effects achieved by the present invention are:

[0066] 1. Convenient installation: The base section of the derrick has a special installation platform to ensure quick installation, and each section of the derrick has an auxiliary deployment device to ensure quick and safe deployment of each section;

[0067] 2. Easy to hook up: The front legs are installed with hooks to reduce the need for quick docking of the derrick legs;

[0068] 3. Smooth lifting: The lifting point can be set at the center of gravity of the derrick section by a small winch to ensure smooth lifting of the derrick. The two small winches can operate separately to adjust the balance of the derrick and ensure that the derrick does not scratch the guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1-2 It is a structural schematic diagram of the present invention;

[0070] Figure 3-4 It is a structural schematic diagram of the main body of the derrick;

[0071] Figure 5 This is a working state diagram of the lifting limit device;

[0072] Figure 6 It is a structural schematic diagram of a locking pin device;

[0073] Figure 7-8 It is a schematic diagram of the structure of segment IV;

[0074] Figure 9-11 It is the structural diagram of section II;

[0075] Figure 12-13 is a schematic diagram of the structure of the base segment;

[0076] Figure 14-15 It is a structural schematic diagram of the adjustment support assembly;

[0077] Fig.16 It is a structural schematic diagram of the cage ladder platform assembly;

[0078] Fig.17 It is a schematic diagram of the installation of the base section on the derrick base section installation platform;

[0079] Figure 18-21 This is a schematic diagram of the base section hoisting and turning over;

[0080] Fig. 22 This is a schematic diagram of installing the lifting system on the base section;

[0081] Fig.23 This is a schematic diagram of installing a ladder on the base section;

[0082] Fig.24 A schematic diagram of installing four sets of derrick supports on mounting seats on the drilling floor;

[0083] Fig.25 This is a schematic diagram of the installation of the introduction bracket;

[0084] Fig.26 It is a schematic diagram of the lifting system;

[0085] Fig. 27 The schematic diagram of the protective shoe on the main body of the derrick is shown;

[0086] Fig.28 It is a schematic diagram of the expansion of Section I, Section II and Section III;

[0087] Figure 29-32 This is the schematic diagram of the hoisting and flipping of Section IV;

[0088] Fig.33 This is a schematic diagram of the overall hoisting of the overhead crane and Section IV;

[0089] Figure 34-38 To lift the IV section, a schematic diagram of the III section is introduced;

[0090] Figure 39-43 To lift the III section, a schematic diagram of the II section is introduced;

[0091] Figures 44-48 To lift the II section, a schematic diagram of the I section is introduced;

[0092] Figure 49-52 Schematic diagram of installing the second-level platform for lifting section I;

[0093] In the figure: 1- overhead crane; 2- main body of the derrick; 3- second floor platform; 4- lifting device; 5- riser; 6- cage ladder platform assembly; 7- drilling platform; 8- adjusting gasket; 9- derrick mounting support; 21- section IV; 22- section III; 23- section II; 24- section I; 25- base; 26- articulated seat; 27- lifting limit device; 28- locking pin device; 211- lifting ear; 212- removable guide Rail; 213-VI segment body; 214-connecting pin; 215-auxiliary winch pulley seat; 216-locking pin block; 217-locking pin block; 218-lifting lug; 231-left single piece; 232-right single piece; 233-hook pin; 234-connecting lug plate; 235-lug; 236-locking pin block; 237-lifting lug; 238-hook lug plate; 239-connecting pin; 2310-swivel Turn pin; 251- single piece of derrick; 252- small winch; 253- front leg; 254- connecting rod; 255- back beam I; 256- guide wheel I; 257- guide wheel II; 258- first diagonal brace; 259- locking pin device; 2510- back beam II; 2511- second diagonal brace; 2512- back connecting frame; 60- lifting system; 601- fixed pulley I; 602- lifting Big rope; 603-movable pulley; 604-fixed pulley II; 605-small hydraulic winch; 61-IV section ladder; 62-III section ladder; 63-II section ladder; 64-I section ladder; 65-top platform of base; 66-base ladder; 67-locking pin platform; 68-winch platform; 69-lower ladder; 100-introduction bracket; 200-protective boots; 250-derrick base section installation platform. DETAILED DESCRIPTION

[0094] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0095] like Figure 1-16 As shown, a method for installing a derrick as a whole according to the present invention comprises a derrick body 2, a second-level platform 3, a lifting device 4, a cage ladder platform assembly 6 and an adjustable support assembly. The derrick body 2 comprises a IV section 21, a III section 22, a II section 23, a I section 24 and a base section 25 arranged in sequence from top to bottom. The IV section 21 is an integrally welded structure with detachable guide rails on both sides; the I section 24, the II section 23 and the III section 22 are foldable structures, and adjacent sections are connected by pins. The lifting device 4 is arranged on the base section 25, and two hydraulic winches are used to lift each section to the working position through wire ropes and pulleys in the order of section IV 21, section III 22, section II 23, and section I 24; the second-level platform 3 is installed between section I 24 and the base section 25; the cage ladder platform assembly 6 includes two sets of ladder systems, and the ladders on both sides start from the drilling platform 7 and can reach the second-level platform 3 and the overhead traveling crane platform; the adjustment support assembly is located at the bottom of the derrick to ensure that the center of the derrick overhead traveling crane is aligned with the center of the wellhead.

[0096] The overall installation method of the derrick of the present invention is a front-opening type K-type derrick without guy ropes based on H-shaped steel, which is mainly composed of a derrick body 2, a second-layer platform 3, a lifting device 4, a cage ladder platform assembly 6, a riser and an adjustable support assembly, etc. The derrick body 2 is a vertical telescopic structure, which is lifted in a segmented lifting manner; the lifting device 4 is arranged on the base section 25, and two hydraulic winches are used to lift each section to the working position through a wire rope and a pulley system in the order of IV section 21, III section 22, II section 23, and I section 24.

[0097] Combination Figure 3-4 In this embodiment, the derrick body 2 is composed of five sections, namely, section IV 21, section III 22, section II 23, section I 24 and base section 25. Section IV 21 is an integrally welded structure with detachable guide rails on both sides, section I 24, section II 23 and section III 22 are foldable structures, and sections are connected by pins; the base section 25 is composed of left and right frame, back connection frame, inclined rods, etc., the straight section is connected by bolts, and the lower inclined section is connected by pins.

[0098] Combination Figure 5 As shown, the front and rear columns of the derrick base section 25 are provided with lifting limit devices 27, which have three states and functions: fully open, anti-overlifting, and anti-slip. Figure 6As shown, the load is transmitted between the derrick section I 24 and the base section 25 via eight locking pin blocks, and the latch plate 282 is flipped by the handle 281 of the pin withdrawal device 28 to rotate the latch plate, thereby supporting the derrick section I 24.

[0099] Combination Figure 7-8 As shown, the derrick section IV 21 is the uppermost section of the derrick, with the upper end connected to the overhead crane (bolt connection) and the lower end connected to other sections of the derrick (pin connection). When hoisting, it is hoisted as a whole with the overhead crane and directly hoisted into the derrick base section 25.

[0100] Section IV 21 is made of H-shaped steel as the main material, with rectangular tubes and angle steel as auxiliary materials. The middle body adopts a truss welding structure, and the guide rails on both sides are connected to the derrick body with double pins to ensure the stability of the guide rails.

[0101] Combination Figure 9-11 As shown, the derrick II section 23 is the middle section, which can be used as a standard section to increase the section so that the derrick can adapt to the arrangement of 3 stands (about 28 meters) of drill pipes.

[0102] The derrick II section 23 is a foldable structure, the main material is H-shaped steel, and the rectangular tube and angle steel are auxiliary materials. The left and right single pieces (231, 232) are welded as a whole, and the middle is connected by a double pin shaft (connecting pin 239 and rotating pin 2310), so that the section can be rotated and folded, so that the section can be transported as a whole without being completely disassembled, realizing fast movement and fast installation.

[0103] The derrick base section 25 is the load-bearing and important lifting section of the entire derrick. It is the core load-bearing component of the derrick and its main functions are:

[0104] A. Connect the drilling platform

[0105] B. Lifting other sections of the derrick

[0106] C. Carrying derrick load

[0107] D. Ensure the stability of the derrick superstructure

[0108] The rear legs of the derrick base section 25 are welded from H-shaped steel, the front legs are made of large-section rectangular tubes, the back connecting frame 12 is made of H-shaped steel, and is connected to the rear legs by (but not limited to) bolts, and is connected to the back diagonal braces (the first diagonal brace 258 and the second diagonal brace 2511) by pins; the front and rear legs of the derrick base section 25 are connected to the derrick articulated seat 26 by pins, and the articulated seat 26 is connected to the drilling platform 7 by bolts.

[0109] The adjustment support assembly is located at the bottom of the derrick, and is composed of an adjustment seat (derrick mounting support 9) and an adjustment pad 8. The adjustment pad 8 has three sets of U-shaped grooves, which can be smoothly inserted between the adjustment seat and the derrick support of the drilling platform. By adding adjustment pads 8 of different thicknesses, the center of the derrick crane is ensured to be aligned with the center of the wellhead.

[0110] Two sets of ladder systems are installed in this well. The ladders on both sides start from the drilling platform and can reach the second-floor platform and the overhead crane platform. Three sets of platforms are set on the base section 25, namely the winch platform 68, the lock pin operation platform 67 and the base section top platform 65. Except for the derrick base section 25 (base ladder 65), other sections of ladders (IV section ladder 61, III section ladder 62, II section ladder 63, I section ladder 64) are transported and installed with each section of the derrick.

[0111] The installation process of the overall installation method of the derrick of the present invention is as follows (eg Figure 17-52 ):

[0112] 1. Assembly of base section

[0113] 1) Assemble the derrick base installation platform;

[0114] 2) The left and right pieces of the derrick base are hoisted onto the platform in turn and connected with tie rods (combined with Fig.17 );

[0115] 3) Install lifeline;

[0116] 4) Install the top platform and ladder of the base;

[0117] 5) Install the base platforms, base ladders, lifting fixed pulleys (transported with the derrick after the first installation), etc. (combined with Figure 22-23 );

[0118] 6) Turn over the derrick base: Remove the process inclined rods, turn over the derrick base as shown in the figure below, and stand it on the ground (combined with Figure 18-21 );

[0119] 2. Deployment of the main body of the derrick I, II and III sections

[0120] The main body I, II, and III sections adopt auxiliary tooling for folding / unfolding, which consists of an L-shaped frame, a set of pulley mechanisms, a power mechanism, and a steel wire rope (combined with Fig.28 );

[0121] 3. Remove the I, II, and III boots 200 (combined Fig. 27 );

[0122] 4. Install the adjustment support assembly

[0123] Install the four sets of derrick supports on the mounting seats on the drilling floor and fasten them with bolts and double nuts; to ensure accurate installation in the future, the dimensions of the four adjustment seats should be checked; (combined with Fig.24 )

[0124] 5. Install the base section

[0125] 1) Use a crane to hoist the turned-over base section assembly to the derrick mounting support on the drilling floor, align the pin holes and connect them using the pin shaft;

[0126] 2) Adjust the base section by adding or removing the pads to make the rear column with the guide wheel on the base section perpendicular to the horizontal plane, with a non-verticality of less than 3mm (checked with a theodolite), and at the same time ensure that the center diagonal difference of the four latch plate holes is less than 5mm;

[0127] 6. Install the introduction bracket (combined with Fig.25 )

[0128] Install the lead-in bracket according to the lead-in bracket drawing. After installation, the left and right guide rails should be on the same horizontal plane, and the unevenness should be less than 5mm;

[0129] 7. Install and adjust the lifting device (combined with Fig.26 )

[0130] 1) Install the hydraulic system of the lifting device, install the operating box assembly on the drilling platform, connect various hydraulic pipeline joints and connect them to the hydraulic main station of the drilling platform; when operating the derrick lifting device, the driller must operate it by observing the instrument on the operating table and reading the requirements and performance described in the manual of each component;

[0131] 2) Add hydraulic oil;

[0132] 3) Start the hydraulic system;

[0133] 4) Adjust the pressure of the hydraulic system;

[0134] 5) Install lifting rope;

[0135] 8. Derrick hoisting

[0136] 1.1. Lifting IV section and overhead crane (combined Figure 29-33 );

[0137] 1.1.1. Operate the four locking pins to open them to avoid interference between the locking pins and the main components of each section during the subsequent lifting process;

[0138] 1.1.2. Turn over the derrick section IV and the overhead crane (including the crane frame);

[0139] 1.1.3. Vertically hoist Section IV together with the overhead crane into the base section of the derrick, so that the guide rails are guided into the guide wheels (at least two guide wheels are in the guide rails);

[0140] 1.1.4. The crane continues to slowly lift the derrick section IV;

[0141] 1.1.5. Operate the lifting limit device to place it in the position to prevent over-lifting of the derrick to avoid over-lifting;

[0142] 1.1.6. When the lock pin block is lifted to contact with the lifting limit device, operate the lock pin to work;

[0143] 1.1.7. The crane lowers the IV section (including the overhead crane and the IV section) so that the limit block of the IV section of the derrick is pressed on the locking pin block;

[0144] 1.1.8. Operate the lifting limit device to place it in the anti-slip position of the derrick. Fig.24 , to prevent the main body of the derrick from moving upward.

[0145] 1.1.9. Operate the hydraulic winch control box to lower the lifting pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting pulley block with the single-ear plates on both sides of the bottom of the derrick section IV, insert the pin shaft and align the position;

[0146] 1.2. Introduce section III and lift section IV (combined with Figure 34-38 )

[0147] 1.2.1. Lift the derrick section III horizontally onto the lead-in bracket, ensure that the derrick section III coincides with the guide rail, and the rotating shaft connected to the hook must be on the hook path; connect the auxiliary guide chain of the hydraulic winch on the drilling floor to the derrick section III;

[0148] 1.2.2. Operate the lifting limit device to place it in the fully open position;

[0149] 1.2.3. Lift the derrick section IV and operate the control box handle to the lifting position. Then the two winches will lift the derrick synchronously.

[0150] Note: During the lifting process, the driller must observe the instrument on the operating table and the upper and lower gaps between the derrick and the guide rail to determine whether the derrick is lifted synchronously. If a large synchronization error occurs, the lifting speed of the left and right sides should be adjusted in time to ensure synchronous lifting.

[0151] Operate the four locking pins to open the position to prevent interference between the locking pins and the main components of each section during subsequent lifting;

[0152] 1.2.4. When lifting the derrick section IV, the shaft of section III is hung on the hook at the front end of the derrick section IV;

[0153] 1.2.5. The crane only hangs the two lifting points at the lower part of the middle section. When lifting the derrick section IV, section III should be out of contact with the track surface of the lead-in bracket;

[0154] 1.2.6. Continue to lift the derrick section IV, and use the guide chain to assist in pulling the derrick toward the winch side, so that the derrick section III slowly approaches verticality; at the same time, the personnel on the lock pin platform observe that when the side column in the middle of the derrick body (the third side column from the bottom to the top) passes the lock pin platform, operate the lifting limit device to put it in the anti-overlifting position;

[0155] 1.2.7. When the lock pin block is lifted to contact with the lifting limit device, operate the lock pin to the working position;

[0156] 1.2.8. Simultaneously operate the control box handle to the lowering position. Then the two winches will lower the IV section synchronously, so that the limit block below the IV section of the derrick is pressed on the lock pin block;

[0157] Note: During the lowering process, the driller must observe the instrument on the operating table and the upper and lower gaps between the derrick and the guide rail to determine whether the derrick is lowered synchronously. If a large synchronization error occurs, the lowering speed of the left and right sides should be adjusted in time to ensure synchronous lowering.

[0158] 1.2.9. Operate the lifting limit device to place it in the anti-slip position of the derrick to prevent the main body of the derrick from slipping upward;

[0159] 1.2.10. Insert two sets of front leg pins into the pin holes of the two-section derrick connecting ear plates; insert two sets of rear leg pins;

[0160] 1.2.11. Remove the fixing pin of the cage ladder guard;

[0161] 1.2.12. Remove the connection between the lifting movable pulley block and Section IV, operate the hydraulic winch control box to lower the lifting movable pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting movable pulley block with the single-ear plates on both sides of the bottom of Section III of the derrick, and put on the pin shaft;

[0162] 1.3. Introduce Section II and lift Section III (combined with Figure 39-43 )

[0163] Same method as 1.2

[0164] 1.4. Introduce section I and lift section II (combined with Figures 44-48 )

[0165] Same method as 1.2

[0166] 1.5. Lifting stage I (combined Figure 49-52 )

[0167] 1.5.1. Remove the connection between the lifting pulley block and Section II, operate the hydraulic winch control box to lower the lifting pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting pulley block with the single-ear plates on both sides of the bottom of Section I of the derrick, and put on the pin shaft;

[0168] 1.5.2. Repeat 1.2.2-1.2.3 to lift the derrick section I;

[0169] 1.5.4. When the locking pin block is lifted to about 300mm past the preset stop point, operate the locking pin to the working position and repeat the operation in 1.2.8 to stop the derrick section I at one of the two preset stop points on the derrick;

[0170] 1.5.3. Install the second-tier platform;

[0171] 1.5.4. Lifting to the correct position

[0172] Repeat 1.2.2-1.2.3 to continue lifting section I of the derrick. At the same time, the personnel on the locking platform observe that when the side column in the middle of the derrick body (the third side column from the bottom to the top) passes the locking platform, operate the lifting limit device to put it in the anti-overlifting position; repeat 1.2.7-1.2.9 to complete the lifting of the derrick.

[0173] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims.

[0174] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A method for integrally installing a derrick, characterized in that: The derrick structure is lifted in sections, which specifically includes the following steps: S1. Assembly of base section: assembling the base section using the derrick base section installation platform; S2. The main body of the derrick, sections I, II and III are unfolded. Sections I, II and III are folded / unfolded using auxiliary tooling; S3, remove the protective boots of sections I, II and III; S4. Install the adjusting support assembly; S5, installing the base section; S6. Install the introduction bracket according to the introduction bracket diagram; S7. Install and adjust the lifting device; S8, derrick hoisting, hoist the installed derrick section IV and the overhead travelling crane as a whole into the guide rail of the derrick base section, and lock the locking pin device; then hang the unfolded derrick section on the hook of the front leg of derrick section IV according to section III, use the small winch on the drilling table to straighten the derrick, and put the pin shaft through; then hang the movable pulley under the lifting pulley to the hanging point under section III of the derrick, operate the lifting small winch, and lift sections IV and III of the derrick as a whole; then lift sections I and II in the same way as section III; finally install the second-floor platform to complete the overall lifting of the derrick.

2. The overall installation method of the derrick according to claim 1, characterized in that: The derrick structure includes a derrick body, a second-floor platform, a lifting device, a cage ladder platform assembly and an adjustable support assembly. The derrick body includes section IV, section III, section II, section I and a base section arranged in sequence from top to bottom. Section IV is an integral welded structure with detachable guide rails on both sides; section I, section II and section III are foldable structures, and adjacent sections are connected by pins; the lifting device is arranged on the base section, and two hydraulic winches are used to lift each section to a working position through wire ropes and pulleys in the order of section IV, section III, section II and section I; the second-floor platform is installed between section I and the base section; the cage ladder platform assembly includes two sets of ladder systems, and the ladders on both sides start from the drilling table and can reach the second-floor platform and the overhead traveling crane platform; the adjustable support assembly is located at the bottom of the derrick to ensure that the center of the derrick overhead traveling crane is aligned with the center of the wellhead.

3. The overall installation method of a derrick according to claim 1, characterized in that: In step S1, the specific steps of assembling the base segment are: S11, assembling the derrick base section installation platform; S12, the left and right pieces of the derrick base section are hoisted onto the derrick base section installation platform in sequence and connected with tie rods; S13, install lifeline; S14, install the top platform of the base section and the base section ladder; S15 installation base section platforms, base ladders, lifting fixed pulley blocks, after the first installation, transported with the derrick as a single piece; S16, Turn over the derrick base section: Remove the process inclined rods, turn over the derrick base section and stand it on the ground.

4. The overall installation method of a derrick according to claim 1, characterized in that: In step S5, the specific steps of installing the base segment are: S51. Use a crane to hoist the turned base section to the derrick mounting support on the drilling floor, align the pin holes, and connect them using a pin shaft; S52. Adjust the base section by adding or removing the pads to make the rear column with the guide wheel on the base section perpendicular to the horizontal plane with a non-perpendicularity of less than 3mm. At the same time, ensure that the difference in the center diagonals of the four latch plate holes is less than 5mm.

5. The overall installation method of a derrick according to claim 1, characterized in that: In step S6, after the bracket is installed, the left and right guide rails should be measured to be on the same horizontal plane with a non-planarity less than 5 mm.

6. The overall installation method of a derrick according to claim 1, characterized in that: In step S6, the specific steps of installing and adjusting the lifting device are: S61. Install the hydraulic system of the lifting device, install the operating box assembly on the drilling platform, connect the hydraulic pipeline joints and connect them to the drilling platform hydraulic main station; S62, add hydraulic oil; S63, start the hydraulic system; S64, adjust the pressure of the hydraulic system; S65. Install the lifting rope.

7. The overall installation method of a derrick according to claim 1, characterized in that: In step S8, the specific steps of lifting the derrick are: S81, hoisting IV section and overhead crane; S811, operate the lock pin block to put it in the open position; S812, turn over the derrick section IV and the overhead crane; S813, vertically hoist the IV section together with the overhead crane into the base section of the derrick, so that the guide rail is guided to the guide wheel; S814, the crane continues to slowly lift the derrick section IV; S815, operate the lifting limit device to place it in the position to prevent over-lifting, so as to avoid over-lifting; S816, when the lock pin block is lifted to contact with the lifting limit device, the lock pin is operated to work; S817, lower the crane and section IV, so that the limit block of section IV of the derrick is pressed on the locking pin block; S818, operate the lifting limit device to place the lifting limit device in the anti-slip position of the derrick to prevent the main body of the derrick from slipping upward; S819, operate the hydraulic winch control box to lower the lifting pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting pulley block with the single-ear plates on both sides of the bottom of the derrick section IV, insert the pin shaft and align the position; S82, introduce section III and lift section IV S821. Lift the derrick section III horizontally onto the lead-in bracket, ensure that the derrick section III is aligned with the guide rail, and the rotating shaft connected to the hook is on the hook path; connect the auxiliary guide chain of the hydraulic winch on the drilling floor to the derrick section III; S822, operate the lifting limit device to place the lifting limit device in the fully open position; S823, lift the derrick section IV, and at the same time operate the control box handle to the lifting position. At this time, the two winches will lift the derrick synchronously. During the lifting process, the driller must observe the instrument on the operating table and the upper and lower gaps between the derrick and the guide rail to determine whether the derrick is lifted synchronously. If a large synchronization error occurs, the lifting speed of the left and right sides should be adjusted in time to make it lift synchronously. Operate the lock pin block to open it to avoid interference between the lock pin block and the main components of each section during the subsequent lifting process. S824, when lifting the derrick section IV, the section III rotating shaft is hung on the front end hook of the derrick section IV; S825. The crane only hangs the two lifting points at the lower part of the middle section. When lifting the derrick section IV, section III should be out of contact with the track surface of the lead-in bracket; S826, continue to lift the derrick section IV, and use the guide chain to assist in pulling the derrick toward the winch side, so that the derrick section III slowly approaches verticality; at the same time, the personnel on the lock pin platform observe that when the side column in the middle of the derrick body passes the lock pin platform, operate the lifting limit device to put it in the anti-overlifting position; S827, when the lock pin block is lifted to contact with the lifting limit device, operate the lock pin to the working position; S828. Simultaneously operate the control box handle to the lowering position. At this time, the two winches lower the IV section synchronously, so that the limit block below the IV section of the derrick is pressed on the lock pin block. During the lowering process, the driller must observe the instrument on the operating table and the upper and lower gaps between the derrick and the guide rail to determine whether the derrick is lowered synchronously. If a large synchronization error occurs, the lowering speed of the left and right sides should be adjusted in time to ensure synchronous lowering. S829, operate the lifting limit device to place it in the anti-slip position of the derrick to prevent the main body of the derrick from slipping upward; S8210, insert the front leg pin and the rear leg pin into the pin holes of the connecting ear plates of the two sections of the derrick; S8211, remove the cage ladder guard cage fixing pin; S8212. Remove the connection between the lifting pulley block and section IV, operate the hydraulic winch control box to lower the lifting pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting pulley block with the single-ear plates on both sides of the bottom of section III of the derrick, and put on the pin shaft; S83, introduce section II and lift section III, the method is the same as S82 S84, introduce section I and lift section II, the method is the same as S82 S85, Lifting Section I S851. Remove the connection between the lifting movable pulley block and section II, operate the hydraulic winch control box to lower the lifting movable pulley block and the lifting rope, connect the double-ear plate at the bottom of the lifting movable pulley block with the single-ear plates on both sides of the bottom of section I of the derrick, and put on the pin shaft; S852, repeat the operations of S822-S823 to lift the derrick section I; S853, when the locking pin block is lifted to about 300 mm past the preset stop point, operate the locking pin to the working position, repeat the operation of S828, and stop the derrick section I at one of the two preset stop points on the derrick; S854, install the second floor platform; S855, lift to the position, repeat S822-S823 to continue lifting the derrick section I. At the same time, the personnel on the locking platform observe that when the side column in the middle of the derrick body passes the locking platform, operate the lifting limit device to put it in the anti-overlifting position; repeat S827-S829 to complete the lifting of the derrick.

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