Folding petroleum drilling machine derrick and derrick dismounting method

Abstract

The invention provides a foldable petroleum drilling machine derrick and a derrick dismounting method, and relates to the technical field of petroleum drilling machines, a derrick main body is mounted above a base and below a crown block, and one side of the derrick main body is open, so that other equipment can be more conveniently mounted, and the internal space is larger; the derrick top section, the derrick middle section and the derrick base section of the derrick main body are detachably connected and can be rapidly disassembled and assembled, modular transportation is achieved, the derrick main body in the horizontal state is lifted to the vertical operation state through the derrick lifting system, the installation state is rapidly converted into the vertical state, and the installation efficiency is improved. The technical problems that in the prior art, a front opening support is long in mounting and dismounting period, and the inner space of a mast-shaped derrick is small are solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling rigs, in particular to a foldable oil drilling rig derrick and a derrick disassembly method. Background Art

[0002] The derrick is a device used to place the overhead crane, hang the traveling block, big hook, lifting ring, elevator and other equipment, and to lift and store the drill pipe, oil pipe and sucker rod during the drilling or well repair process. The derrick is composed of the main body, the second floor platform, the riser platform and the working ladder. The drilling rig derrick can be divided into the front opening derrick and the mast derrick according to the main characteristics of the overall structure.

[0003] The front-opening derrick is also called the Π-shaped derrick. The main body of the derrick is composed of 3 to 5 sections of welded structure. Each section is composed of the left, middle and right frame pieces, the back fan and the inclined beam. The sections are positioned by taper pins or connected by bolts. The front-opening derrick has become the most widely used land drilling rig derrick due to its simple structure, good load-bearing capacity and overall stability.

[0004] The mast derrick is a single-column derrick composed of one or more rod structures or pipe structures. There are two types: integral and telescopic. This type of derrick is generally raised and lowered as a whole by hydraulic components or winches, and transported in sections or as a whole. It is very convenient to disassemble and transport. The mast derrick has a simple and light structure, but its load-bearing capacity is small, and it is only used for vehicle-mounted light drilling rigs and well repair rigs.

[0005] However, the front-opening derrick consists of a left middle section, a right frame, a back fan, and an inclined beam, and is installed horizontally by a crane. The derrick has a large internal space, but a long assembly and disassembly cycle. The mast-type derrick is a telescopic set with a short assembly and disassembly cycle, but a small internal space, and is only suitable for well repair rigs. Summary of the invention

[0006] The purpose of the present invention is to provide a foldable oil drilling rig derrick and a derrick disassembly method, so as to alleviate the technical problems existing in the prior art of long installation and disassembly cycle of front opening bracket and small internal space of mast-shaped derrick.

[0007] The foldable oil drilling rig derrick provided by the present invention comprises: a derrick body, derrick accessories, a derrick hoisting system, a swimming system and a second-layer platform;

[0008] The top of the derrick body is detachably connected to the overhead traveling block, the bottom of the derrick body is mounted on a base, and one side of the derrick body is open;

[0009] The derrick accessories are fixed on the derrick body;

[0010] The derrick hoisting system is in transmission connection with the derrick body, and the derrick hoisting system is used to drive the derrick body to rotate, so as to lift the derrick body from a horizontal installation state to a vertical operation state;

[0011] The traveling system is slidably connected to the derrick main body, and the traveling system is used for drilling hoisting;

[0012] The monkey board is detachably connected to the derrick main body;

[0013] The derrick main body includes a derrick top section, a derrick middle section and a derrick base section which are detachably connected to each other.

[0014] Furthermore,

[0015] The top end of the derrick top section is connected to the crown block by bolts, the bottom end of the derrick top section is connected to the top end of the derrick middle section by a pin shaft, and the bottom end of the derrick middle section is connected to the top end of the derrick base section by a pin shaft.

[0016] Furthermore,

[0017] The derrick middle section includes a plurality of derrick module frames connected in sequence, and any two adjacent derrick module frames are connected by a pin shaft;

[0018] The derrick module frame includes a middle left frame piece and a middle right frame piece. Both the middle left frame piece and the middle right frame piece are arranged in an L shape, and the end of the middle left frame piece is rotatably connected to the end of the middle right frame piece by a turning shaft. A clamping seat is arranged on the middle right frame piece, and the clamping seat is used for connecting the middle left frame piece to fix the middle left frame piece on the middle right frame piece to form a frame structure by surrounding.

[0019] Furthermore,

[0020] The derrick base section includes a base left frame piece, a base right frame piece, a back fan steel frame and a derrick front leg;

[0021] The base left frame piece and the base right frame piece are respectively connected to the left and right sides of the back fan steel frame by a pin shaft;

[0022] The end of the base left frame piece far from the back fan steel frame and the end of the base right frame piece far from the back fan steel frame are both connected with the derrick front leg by a pin shaft.

[0023] Furthermore,

[0024] The derrick accessories include a top drive guide rail and a cage ladder;

[0025] The top drive guide rail is fixed inside the derrick main body, and the cage ladder is fixed outside the derrick main body.

[0026] Furthermore,

[0027] The derrick lifting system includes a derrick lifting hydraulic component, a connecting pin shaft, a hydraulic control box, a comprehensive hydraulic station and a hydraulic component auxiliary recovery component;

[0028] The end of the derrick lifting hydraulic component is connected to the derrick main body through the connecting pin shaft, and the derrick lifting hydraulic component is used to drive the derrick main body to rotate;

[0029] The hydraulic component auxiliary recovery component is in transmission connection with the derrick lifting hydraulic component, and the hydraulic component auxiliary recovery component is used to drive the derrick lifting hydraulic component to rotate;

[0030] The integrated hydraulic station is respectively communicated with the derrick lifting hydraulic component and the hydraulic component auxiliary recovery component, and the hydraulic control box is electrically connected to the integrated hydraulic station.

[0031] Further,

[0032] The traveling block system includes a traveling block, a top drive support frame and a top drive device;

[0033] The upper end of the top drive support frame is connected to the traveling block, the lower end of the top drive support frame is connected to the top drive device, the traveling block is slidably connected to the top drive guide rail, and the traveling block is used to drive the top drive support frame and the top drive device to move along the top drive guide rail.

[0034] Further,

[0035] The top drive support frame includes a sliding frame, an extending arm and an extending oil cylinder;

[0036] One end of the extending oil cylinder is connected to the extending arm, the other end of the extending oil cylinder is connected to the sliding frame, and one end of the extending arm is hinged to the sliding frame;

[0037] The top drive device is fixed on the extending arm, and the extending oil cylinder is used to drive the extending arm to rotate relative to the sliding frame so that the top drive device moves between the wellhead center position and the mousehole position.

[0038] Further,

[0039] A support assembly is arranged inside the derrick main body, and the support assembly is used to provide support for the top drive device in the horizontal position state.

[0040] In a second aspect, the present invention provides a derrick disassembly method based on the folding oil drilling rig derrick, including the following steps:

[0041] The first step: Lift the traveling block system and fix it between the traveling block system and the crown block through the traveling hook suspension rope;

[0042] The second step: Extend the support assembly inside the top layer derrick to provide support for the top drive device in the horizontal state;

[0043] Part 3: Dismantle the second-floor platform;

[0044] Step 4: Start the integrated hydraulic station, operate the hydraulic control box to control the hydraulic cylinder auxiliary recovery component to connect the upper end of the derrick lifting hydraulic component with the derrick with a pin, then remove the derrick front leg pin, operate the hydraulic control box to control the derrick lifting hydraulic component to lower the derrick, so as to adjust the derrick body from a vertical state to a horizontal state;

[0045] Step 5: Release the connection between the mast hoisting hydraulic component and the mast body; untie the drilling wire rope from the dead rope holder, operate the winch and the rope retractor to pull the drilling wire rope back to the drilling wire rope packaging steel wheel, fix the drilling wire rope head to the mast, and hoist the rope retractor to the top section of the mast and fix it;

[0046] Step 6: Remove the pins between the top section and the middle section of the derrick, and hoist the top section of the derrick onto the transport rack;

[0047] Step 7: Remove the derrick module frames of each section of the middle section of the derrick in turn, move the crane to the ground, remove the rotating fixing pin, rotate and fold the left frame piece of the middle section to the right frame piece of the middle section, and then move the current section to the transport frame;

[0048] Step 8: Remove the back fan steel frame;

[0049] Step 9: Remove the left frame piece of the base section, the right frame piece of the base section and the front leg of the derrick and move them to the transport frame.

[0050] The foldable oil drilling rig derrick provided by the present invention has a derrick main body installed on the base and under the overhead crane, and one side of the derrick main body is open, so other equipment can be installed more conveniently and the internal space is larger. The derrick main body includes a derrick top section, a derrick middle section and a derrick base section, which are detachably connected and can be quickly disassembled and assembled, and modular transportation can be achieved. The derrick main body in a horizontal state is lifted to a vertical working state by a derrick lifting system, and the installed state is quickly converted to a vertical state, which alleviates the technical problems of long installation and disassembly cycle of the front opening bracket and small internal space of the mast-shaped derrick in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A schematic diagram of the installation structure of a foldable oil drilling rig derrick provided by an embodiment of the present invention;

[0053] Figure 2 Schematic diagram of the overall structure of the folding derrick of an oil drilling rig provided by an embodiment of the present invention;

[0054] Figure 3 Schematic diagram of the installation structure of the derrick accessories in the folding derrick of an oil drilling rig provided by an embodiment of the present invention;

[0055] Figure 4 Schematic diagram of the structure of the derrick main body in the folding derrick of an oil drilling rig provided by an embodiment of the present invention;

[0056] Figure 5 It is Figure 4 Schematic diagram of the structure from the right view;

[0057] Figure 6 Schematic diagram of the structure of the top section of the derrick in the folding derrick of an oil drilling rig provided by an embodiment of the present invention;

[0058] Figure 7 It is Figure 6 Schematic diagram of the structure from the right view;

[0059] Figure 8 Schematic diagram of the structure of the middle section of the derrick in the folding derrick of an oil drilling rig provided by an embodiment of the present invention;

[0060] Figure 9 Schematic diagram of the structure of the middle section of the derrick in the folding derrick of an oil drilling rig provided by an embodiment of the present invention from the top view;

[0061] Figure 10 Schematic diagram of the structure when the middle section of the derrick in the folding derrick of an oil drilling rig provided by an embodiment of the present invention is flipped;

[0062] Figure 11 Schematic diagram of the structure of the middle section of the derrick in the folding derrick of an oil drilling rig provided by an embodiment of the present invention in the folded transportation state;

[0063] Figure 12 Schematic diagram of the structure of the base section of the derrick in the folding derrick of an oil drilling rig provided by an embodiment of the present invention, including the front view and the right view;

[0064] Figure 13 Schematic diagram of the structure of the derrick accessories in the folding derrick of an oil drilling rig provided by an embodiment of the present invention;

[0065] Figure 14 Schematic diagram of the structure of the derrick main body in the folding derrick of an oil drilling rig provided by an embodiment of the present invention in the folded transportation state;

[0066] Figure 15 Schematic diagram of the structure when the derrick main body in the folding derrick of an oil drilling rig provided by an embodiment of the present invention is hoisted and installed;

[0067] Figure 16 Schematic structural diagram of the folded oil drilling rig derrick when the derrick lifting hydraulic component is retracted provided by the embodiment of the present invention;

[0068] Figure 17 Schematic structural diagram of the traveling block system and the top drive slide rail in the folded oil drilling rig derrick provided by the embodiment of the present invention;

[0069] Figure 18 Schematic structural diagram of the installation of the extending oil cylinder in the folded oil drilling rig derrick provided by the embodiment of the present invention;

[0070] Figure 19 Three-view drawing of the structure of the top drive support frame in the folded oil drilling rig derrick provided by the embodiment of the present invention;

[0071] Figure 20 Schematic structural diagram of the folded oil drilling rig derrick in the folded transportation state provided by the embodiment of the present invention.

[0072] Icon: 1-1, base; 1-3, crown block; 2-1, derrick body; 2-2, derrick accessory; 2-3, derrick lifting system; 2-4, traveling system; 2-5, monkey board; 3-1, top section of derrick; 3-2, middle section of derrick; 3-3, base section of derrick; 4-1, bolt; 4-2, frame structure; 4-3, first pin shaft; 4-4, support assembly; 5-1, derrick module rack; 5-2, second pin shaft; 5-4, left frame piece of middle section; 5-5, right frame piece of middle section; 6-1, clamping seat; 7-1, left frame piece of base section; 7-2, front leg of derrick; 7-3, right frame piece of base section; 7-4, back fan steel frame; 7-5, dead line anchor; 8-1, top drive guide rail; 8-2, cage ladder; 8-3, riser operating platform; 8-4, riser fixing device; 9-1, derrick lifting hydraulic component; 9-2, auxiliary recovery component of hydraulic component; 9-3, connecting pin shaft; 9-4, hydraulic control box; 9-5, integrated hydraulic station; 10-1, traveling block; 10-2, top drive support frame; 10-3, top drive device; 11-1, sliding frame; 11-2, extending arm; 11-3, extending oil cylinder. Detailed implementation manners

[0073] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0074] As Figures 1 - 20As shown in the figure, the folding oil drilling rig derrick provided in this embodiment includes: a derrick body 2-1, derrick accessories 2-2, a derrick hoisting system 2-3, a traveling system 2-4, and a monkey board 2-5; the top of the derrick body 2-1 is detachably connected to the crown block 1-3, the bottom of the derrick body 2-1 is installed on the substructure 1-1, and one side of the derrick body 2-1 is open; the derrick accessories 2-2 are fixed on the derrick body 2-1; the derrick hoisting system 2-3 is drivingly connected to the derrick body 2-1, and the derrick hoisting system 2-3 is used to drive the derrick body 2-1 to rotate so as to lift the derrick body 2-1 from the horizontal installation state to the vertical working state; the traveling system 2-4 is slidably connected to the derrick body 2-1, and the traveling system 2-4 is used for drilling hoisting; the monkey board 2-5 is detachably connected to the derrick body 2-1; the derrick body 2-1 includes a derrick top section 3-1, a derrick middle section 3-2, and a derrick base section 3-3 that are detachably connected to each other.

[0075] For the folding oil drilling rig derrick provided in this embodiment, the derrick body 2-1 is installed above the substructure 1-1 and below the crown block 1-3, and one side of the derrick body 2-1 is open, which can facilitate the installation of other equipment more conveniently and has a larger internal space. The derrick top section 3-1, derrick middle section 3-2, and derrick base section 3-3 included in the derrick body 2-1 are detachably connected, which can be quickly disassembled and assembled, and modular transportation can be realized. The derrick body 2-1 in the horizontal state is lifted to the vertical working state by the derrick hoisting system 2-3, and the installation state is quickly changed to the vertical state, alleviating the technical problems of the long installation and disassembly cycle of the front-opening support and the small internal space of the mast derrick in the prior art.

[0076] On the basis of the above embodiment, the top end of the derrick top section 3-1 in the folding oil drilling rig derrick provided in this embodiment is connected to the crown block 1-3 by bolts 4-1. The derrick top section 3-1 adopts a frame structure 4-2 and is an independent transportation unit. The bottom end of the derrick top section 3-1 is connected to the top end of the derrick middle section 3-2 by a first pin shaft 4-3, and the bottom end of the derrick middle section 3-2 is connected to the top end of the derrick base section 3-3 by a first pin shaft 4-3.

[0077] Furthermore, the middle section 3-2 of the derrick includes a plurality of derrick module frames 5-1 connected in sequence. Any two adjacent derrick module frames 5-1 are connected by a second pin shaft 5-2. The specific number of derrick module frames 5-1 can be increased or decreased arbitrarily according to customer requirements. The derrick module frame 5-1 includes a middle section left frame piece 5-4 and a middle section right frame piece 5-5. Both the middle section left frame piece 5-4 and the middle section right frame piece 5-5 are set in an L shape, and the end of the middle section left frame piece 5-4 is rotationally connected to the end of the middle section right frame piece 5-5 through a turning shaft. A clamping seat 6-1 is arranged on the middle section right frame piece 5-5. The clamping seat 6-1 is used to connect the middle section left frame piece 5-4 to fix the middle section left frame piece 5-4 on the middle section right frame piece 5-5 to form a frame structure by surrounding. The middle section left frame piece 5-4 can rotate around the turning shaft. When transporting, the middle section left frame piece 5-4 is folded into the middle section right frame piece 5-5 and can be fixed by the clamping seat 6-1 to ensure stability during transportation. During operation, the middle section left frame piece 5-4 is unfolded and fixed with a pin shaft to ensure stability.

[0078] Furthermore, the base section 3-3 of the derrick includes a base section left frame piece 7-1, a base section right frame piece 7-3, a back fan steel frame 7-4 and a derrick front leg 7-2. The base section left frame piece 7-1 and the base section right frame piece 7-3 are respectively connected to the left and right sides of the back fan steel frame 7-4 through pin shafts. One end of the base section left frame piece 7-1 far from the back fan steel frame 7-4 and one end of the base section right frame piece 7-3 far from the back fan steel frame 7-4 are both connected with a derrick front leg 7-2 through pin shafts.

[0079] In addition, a dead line holder is arranged on the base section right frame piece 7-3. The dead line holder is a mature existing product and will not be elaborated in detail.

[0080] Furthermore, the derrick accessories 2-2 include a top drive guide rail 8-1, a cage ladder 8-2, a riser operating platform 8-3 and a riser fixing device 8-4. The riser operating platform 8-3 and the riser fixing device 8-4 are both existing structures and will not be elaborated here. The top drive guide rail 8-1 is fixed inside the derrick main body 2-1, and the cage ladder 8-2 is fixed outside the derrick main body 2-1.

[0081] Specifically, the derrick accessories 2-2 are designed to be integrated with the derrick main body 2-1 to the greatest extent and are not disassembled during the derrick relocation process. The top section 3-1 of the derrick is a frame structure 4-2, and the top drive guide rail 8-1 is integrated inside the top section derrick. The top drive guide rail 8-1 of the middle section 3-2 of the derrick is folded synchronously with the middle section 3-2 of the derrick. The top drive guide rail 8-1 of the base section 3-3 of the derrick is fixed on the back fan steel frame 7-4 and is transported together with the steel frame. Moreover, the top drive guide rail 8-1 adopts a double-rail structure to ensure stability during the top drive operation.

[0082] Further, the derrick hoisting system 2-3 includes a derrick hoisting hydraulic component 9-1, a connecting pin shaft 9-3, a hydraulic control box 9-4, a comprehensive hydraulic station 9-5, and a hydraulic component auxiliary recovery component 9-2; the end of the derrick hoisting hydraulic component 9-1 is connected to the derrick main body 2-1 through the connecting pin shaft 9-3, and the derrick hoisting hydraulic component 9-1 is used to drive the derrick main body 2-1 to rotate; the hydraulic component auxiliary recovery component 9-2 is in transmission connection with the derrick hoisting hydraulic component 9-1, and the hydraulic component auxiliary recovery component 9-2 is used to drive the derrick hoisting hydraulic component 9-1 to rotate; the comprehensive hydraulic station 9-5 is respectively communicated with the derrick hoisting hydraulic component 9-1 and the hydraulic component auxiliary recovery component 9-2, and the hydraulic control box 9-4 is electrically connected to the comprehensive hydraulic station 9-5.

[0083] Specifically, a fixed plate is arranged beside the derrick main body 2-1, and the derrick hoisting hydraulic component 9-1, the comprehensive hydraulic station 9-5, and the drawworks are all fixed on the fixed plate. When the derrick main body 2-1 needs to be hoisted, the end of the derrick hoisting hydraulic component 9-1 is installed on the derrick main body 2-1 through the connecting pin shaft 9-3. The derrick hoisting hydraulic component 9-1 and the hydraulic component auxiliary recovery component 9-2 work together to lift the derrick main body 2-1 from the horizontal position to the vertical position. After the hoisting is completed, the connection between the derrick hoisting hydraulic component 9-1 and the derrick main body 2-1 is released, and the hydraulic component auxiliary recovery component 9-2 is used to drive the derrick hoisting hydraulic component 9-1 to rotate, so that the derrick hoisting hydraulic component 9-1 moves away from the derrick main body 2-1, and the derrick hoisting hydraulic component 9-1 is recovered.

[0084] Further, the traveling system 2-4 includes a traveling block 10-1, a top drive support frame 10-2, and a top drive device 10-3; the traveling system 2-4 is combined with the crown block 1-3 and the drawworks to lift the drill string to realize the exploration operation of the drilling rig. The traveling block 10-1 and the top drive device 10-3 are both mature products of the existing technology and will not be elaborated here. The upper end of the top drive support frame 10-2 is connected to the traveling block 10-1, and the lower end of the top drive support frame 10-2 is connected to the top drive device 10-3. The traveling block 10-1 is slidably connected to the top drive guide rail 8-1, and the traveling block 10-1 is used to drive the top drive support frame 10-2 and the top drive device 10-3 to move along the top drive guide rail 8-1.

[0085] Specifically, the top drive support frame 10-2 includes a slide frame 11-1, an extension arm 11-2 and an extension cylinder 11-3; the traveling block 10-1 drives the slide frame 11-1 to move up and down together, one end of the device fixed extension cylinder 11-3 is connected to the extension arm 11-2, the other end of the extension cylinder 11-3 is connected to the slide frame 11-1, and one end of the extension arm 11-2 is hinged to the slide frame 11-1; the top drive device 10-3 is fixed on the extension arm 11-2, and the extension cylinder 11-3 is used to drive the extension arm 11-2 to rotate relative to the slide frame 11-1, so that the top drive device 10-3 moves between the center position of the wellhead and the mouse hole position.

[0086] A support assembly 4-4 is provided in the derrick body 2-1. The support assembly 4-4 is used to provide support for the top drive device 10-3 in a horizontal position. The support assembly 4-4 includes a support plate, a rotating rod and a driving member. The driving member is fixed on the derrick body 2-1. The driving member is connected to the rotating rod by transmission. The two ends of the rotating rod are respectively hinged to the derrick body 2-1 and the support plate. The driving member drives the rotating rod to rotate relative to the derrick body 2-1, which can drive the support plate to move and change from a folded state to a supported state. It should be noted that Figure 12 The middle support assembly 4-4 is in a folded state and needs to be driven by a driving member to drive the rotating rod to rotate so that the support plate can support the top drive device 10-3. The driving member can use a structure such as a hydraulic cylinder, an air cylinder or a motor.

[0087] The derrick disassembly method of the foldable oil drilling rig derrick provided in this embodiment comprises the following steps:

[0088] Step 1: Lift the traveling system 2-4 and fix the traveling system 2-4 and the overhead crane 1-3 by means of the traveling hook hanging rope;

[0089] Step 2: Extend the support assembly 4-4 inside the top derrick to provide support for the top drive device 10-3 in a horizontal state;

[0090] Part 3: Dismantle the second floor platform 2-5;

[0091] Step 4: Start the integrated hydraulic station 9-5, and operate the hydraulic control box 9-4 to control the hydraulic cylinder auxiliary recovery component to connect the upper end of the derrick lifting hydraulic component 9-1 with the derrick with a pin shaft, then remove the pin shaft of the derrick front leg 7-2, and operate the hydraulic control box 9-4 to control the derrick lifting hydraulic component 9-1 to lower the derrick, so as to adjust the derrick body 2-1 from a vertical state to a horizontal state;

[0092] Step 5: Disconnect the connection between the derrick hoisting hydraulic component 9-1 and the derrick main body 2-1; untie the fixing of the drilling wire rope at the dead line clamp, operate the drawworks and the rope reel to retract the drilling wire rope onto the drilling wire rope packaging steel wheel, fix the end of the drilling wire rope to the derrick, lift the rope reel to the top section 3-1 of the derrick and fix it;

[0093] Step 6: Remove the pin shaft between the top section 3-1 and the middle section 3-2 of the derrick, and lift the top section 3-1 of the derrick onto the transport rack;

[0094] Step 7: Remove the derrick module frames 5-1 of each section of the middle section 3-2 of the derrick in sequence, lift the derrick to the ground by a crane, remove the rotating fixing pin, rotate and fold the left frame piece 5-4 of the middle section to the right frame piece 5-5 of the middle section, and then transfer the current section to the transport rack;

[0095] Step 8: Remove the back fan steel frame 7-4;

[0096] Step 9: Remove the left base frame piece 7-1, the right base frame piece 7-3 and the derrick front leg 7-2 and transfer them to the transport rack.

[0097] The process of installing the drilling rig derrick is opposite to the disassembly process and will not be elaborated here.

[0098] Through the above steps, modular transportation of the derrick can be achieved, and disassembly and assembly are more convenient.

[0099] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A folding derrick for oil drilling rigs, characterized in that, Including: A derrick main body (2-1), derrick accessories (2-2), a derrick hoisting system (2-3), a traveling block system (2-4), and a monkey board (2-5); The top of the derrick main body (2-1) is detachably connected to the crown block (1-3), the bottom of the derrick main body (2-1) is installed on the substructure (1-1), and one side of the derrick main body (2-1) is open; The derrick accessories (2-2) are fixed on the derrick main body (2-1); The derrick hoisting system (2-3) is in transmission connection with the derrick main body (2-1), and the derrick hoisting system (2-3) is used to drive the derrick main body (2-1) to rotate so as to lift the derrick main body (2-1) from a horizontal installation state to a vertical working state; The traveling block system (2-4) is slidably connected to the derrick main body (2-1), and the traveling block system (2-4) is used for drilling hoisting; The monkey board (2-5) is detachably connected to the derrick main body (2-1); The derrick main body (2-1) includes a derrick top section (3-1), a derrick middle section (3-2), and a derrick base section (3-3) that are detachably connected to each other.

2. The folding derrick for oil drilling rigs according to claim 1, characterized in that, The top end of the derrick top section (3-1) is connected to the crown block (1-3) by bolts (4-1), the bottom end of the derrick top section (3-1) is connected to the top end of the derrick middle section (3-2) by a pin shaft, and the bottom end of the derrick middle section (3-2) is connected to the top end of the derrick base section (3-3) by a pin shaft.

3. The folding derrick for oil drilling rigs according to claim 2, characterized in that, The derrick middle section (3-2) includes a plurality of derrick module frames (5-1) connected in sequence, and any two adjacent derrick module frames (5-1) are connected by a pin shaft; The derrick module frame (5-1) includes a middle section left frame plate (5-4) and a middle section right frame plate (5-5), both the middle section left frame plate (5-4) and the middle section right frame plate (5-5) are set to be L-shaped, and the end of the middle section left frame plate (5-4) is rotatably connected to the end of the middle section right frame plate (5-5) by a turning shaft. A clamping seat (6-1) is arranged on the middle section right frame plate (5-5), and the clamping seat (6-1) is used to connect the middle section left frame plate (5-4) to fix the middle section left frame plate (5-4) on the middle section right frame plate (5-5) to form a frame structure by surrounding.

4. The folding derrick for oil drilling rigs according to claim 3, characterized in that, The derrick base section (3-3) includes a base section left frame plate (7-1), a base section right frame plate (7-3), a back fan steel frame (7-4), and a derrick front leg (7-2); The base section left frame plate (7-1) and the base section right frame plate (7-3) are respectively connected to the left and right sides of the back fan steel frame (7-4) by a pin shaft; One end of the base section left frame plate (7-1) far from the back fan steel frame (7-4) and one end of the base section right frame plate (7-3) far from the back fan steel frame (7-4) are both connected with the derrick front leg (7-2) by a pin shaft.

5. The folding derrick for oil drilling rigs according to claim 1, characterized in that, The derrick accessories (2-2) include a top drive guide rail (8-1) and a cage ladder (8-2); The top drive guide rail (8-1) is fixed inside the derrick body (2-1), and the cage ladder (8-2) is fixed outside the derrick body (2-1).

6. The folding derrick for oil drilling rigs according to claim 1, characterized in that, The derrick hoisting system (2-3) includes a derrick hoisting hydraulic component (9-1), a connecting pin shaft (9-3), a hydraulic control box (9-4), a comprehensive hydraulic station (9-5), and a hydraulic component auxiliary recovery component (9-2); The end of the derrick hoisting hydraulic component (9-1) is connected to the derrick body (2-1) through the connecting pin shaft (9-3), and the derrick hoisting hydraulic component (9-1) is used to drive the derrick body (2-1) to rotate; The hydraulic component auxiliary recovery component (9-2) is in transmission connection with the derrick hoisting hydraulic component (9-1), and the hydraulic component auxiliary recovery component (9-2) is used to drive the derrick hoisting hydraulic component (9-1) to rotate; The comprehensive hydraulic station (9-5) is respectively communicated with the derrick hoisting hydraulic component (9-1) and the hydraulic component auxiliary recovery component (9-2), and the hydraulic control box (9-4) is electrically connected to the comprehensive hydraulic station (9-5).

7. The folding derrick for oil drilling rigs according to claim 5, characterized in that, The traveling system (2-4) includes a traveling block (10-1), a top drive support frame (10-2), and a top drive device (10-3); The upper end of the top drive support frame (10-2) is connected to the traveling block (10-1), the lower end of the top drive support frame (10-2) is connected to the top drive device (10-3), the traveling block (10-1) is slidably connected to the top drive guide rail (8-1), and the traveling block (10-1) is used to drive the top drive support frame (10-2) and the top drive device (10-3) to move along the top drive guide rail (8-1).

8. The folding derrick for oil drilling rigs according to claim 7, characterized in that, The top drive support frame (10-2) includes a sliding frame (11-1), an extending arm (11-2), and an extending oil cylinder (11-3); One end of the extending oil cylinder (11-3) is connected to the extending arm (11-2), the other end of the extending oil cylinder (11-3) is connected to the sliding frame (11-1), and one end of the extending arm (11-2) is hinged to the sliding frame (11-1); The top drive device (10-3) is fixed on the extending arm (11-2), and the extending oil cylinder (11-3) is used to drive the extending arm (11-2) to rotate relative to the sliding frame (11-1), so that the top drive device (10-3) moves between the wellhead center position and the mouse hole position.

9. The folding derrick for oil drilling rigs according to claim 8, characterized in that, A support assembly (4-4) is arranged inside the derrick body (2-1), and the support assembly (4-4) is used to provide support for the top drive device (10-3) in the horizontal position state.

10. A method for disassembling the derrick of a folding oil drilling rig according to any one of claims 1-9, characterized in that, Including the following steps: The first step: The traveling system (2-4) is lifted, and the traveling system (2-4) is fixed to the crown block (1-3) through the traveling hook suspension rope; The second step: The support assembly (4-4) inside the top layer of the derrick is extended to provide support for the top drive device (10-3) in the horizontal state; The third step: Remove the monkey board (2-5); Step 4: Start the integrated hydraulic station (9-5), and control the hydraulic cylinder auxiliary recovery component through the operation of the hydraulic control box (9-4) to connect the upper end of the derrick lifting hydraulic component (9-1) with the derrick by a pin shaft. Then, remove the pin shaft of the front derrick leg (7-2), and operate the hydraulic control box (9-4) to control the derrick lifting hydraulic component (9-1) to lower the derrick, so as to adjust the derrick main body (2-1) from the vertical state to the horizontal state; Step 5: Disconnect the derrick lifting hydraulic component (9-1) from the derrick main body (2-1); Unfasten the fixing of the drilling wire rope at the dead line anchor. Operate the drawworks and the rope reel to retract the drilling wire rope onto the drilling wire rope packaging steel wheel, fix the end of the drilling wire rope to the derrick, and lift the rope reel to the top section (3-1) of the derrick and fix it; Step 6: Remove the pin shaft between the top section (3-1) and the middle section (3-2) of the derrick, and lift the top section (3-1) of the derrick onto the transport rack; Step 7: Remove the derrick module racks (5-1) of each section of the middle section (3-2) of the derrick in sequence. Lift the crane to the ground, remove the rotary fixing pin, rotate and fold the left frame piece (5-4) of the middle section to the right frame piece (5-5) of the middle section, and then transfer the current section to the transport rack; Step 8: Remove the back fan steel frame (7-4); Step 9: Remove the left frame piece (7-1) of the base section, the right frame piece (7-3) of the base section and the front derrick leg (7-2) and transfer them to the transport rack.

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