Bootstrapping tower type derrick for ocean drilling rig

Abstract

The utility model discloses a bootstrapping tower type derrick for an ocean drilling rig, which comprises a derrick lower section, a derrick overlapping section, a derrick main body section, a derrick top section and a crown block, the derrick lower section is fixed on a platform mounting seat through a connecting pin, the derrick overlapping section is embedded in the derrick lower section, and the derrick lower section is locked through a connecting plate; the main body section is composed of multiple stages of subsection modules, and a hydraulic winch drives a lifting pulley block and a guide pulley to achieve step-by-step self-lifting type synchronous lifting. According to the utility model, the traditional large hoisting equipment is abandoned through segmented preassembling, hydraulic traction and a guide positioning system, so that the risk of high-altitude operation is reduced; the tower-shaped vertical supporting legs and the rectangular section design enhance the structural stability and adapt to the deep sea complex environment; and a ladder system and a racking platform are integrated inside, so that the compatibility of the operation space and equipment is optimized. The derrick has the advantages of being efficient in installation, high in stability and low in maintenance cost, and is suitable for narrow operation scenes of marine drilling platforms.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ocean oil and gas drilling equipment, in particular to a self-lifting tower type derrick for ocean drilling rig. BACKGROUND

[0002] At present, the tower type derrick for the conventional drilling ship or drilling platform is installed by separate scattered rod members using bolts on land, and after installation is completed, the whole is hoisted to the drilling ship or drilling platform by large hoisting equipment. The separate scattered rod member installation process is complex, and there are many high-altitude operations, which are highly dangerous. The conventional tower type derrick needs to be hoisted to land by large hoisting equipment for maintenance or disassembly in the later use process.

[0003] Because of the narrow space of the drilling ship or drilling platform, the whole conventional tower type installation and disassembly process cannot be carried out on the drilling ship or drilling platform, and the whole process is time-consuming and laborious. Therefore, a self-lifting tower type derrick for ocean drilling rig adopts a new modular structure on the basis of meeting the function of drilling equipment, without the need for large hoisting equipment.

[0004] Although the portal derrick disclosed in the prior art CN202311779177.1 optimizes the lifting structure, its cross-sectional size is small and its stability is poor, which cannot meet the demand of deep sea drilling. Therefore, there is an urgent need for a tower type derrick with modularization, self-lifting lifting and high stability. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a self-lifting tower type derrick for ocean drilling rig, which realizes low-position installation, efficient disassembly and high structural stability of the derrick through modular segmented design, hydraulic winch synchronous lifting and guiding positioning system, so as to solve the problems proposed in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: A self-lifting tower type derrick for ocean drilling rig, including derrick lower section, derrick coincident section, derrick main body section, derrick top section and crown block, the derrick lower section is fixed to platform mesa through four vertical legs, and the lower end of its leg is connected with the platform mounting seat through derrick lower section connecting pin; the derrick lower section is nested with the derrick coincident section, and the four legs of the derrick coincident section are fixed with the legs of the derrick lower section through the connecting plate; the derrick main body section is sequentially connected above the derrick coincident section, and the derrick main body section includes derrick one section, derrick two section, derrick three section, derrick four section, derrick five section and derrick top section, and each section is connected step by step through derrick section connecting pin; the crown block is installed on the top of the derrick top section; the lifting pulley block is symmetrically installed below the upper beam of both sides of the derrick lower section, and the lifting pulley block is connected with the hydraulic winch on both sides of the platform mesa through the steel wire rope; the four legs of the derrick lower section are provided with guide pulleys at the upper and lower ends, and are used for guiding the lifting of the derrick main body section; the derrick lower section is provided with lower section ladders outside, the derrick main body section is provided with internal ladders inside, the derrick top section is provided with top section ladders inside, and the derrick two section is provided with internal two-layer platforms inside.

[0007] Preferably, the top view section of the derrick main body section is rectangular, the sizes of the legs of the derrick one section, the derrick two section, the derrick three section, the derrick four section, the derrick five section and the derrick top section gradually decrease, the leg size of the derrick coincident section is smaller than that of the derrick lower section, and the leg size of the derrick top section is consistent with that of the derrick five section.

[0008] Preferably, the steel wire rope of the lifting pulley block and the hydraulic winch forms a closed loop traction system through the guide pulley, so that the synchronous lifting and positioning of the derrick main body section are realized.

[0009] Preferably, the platform mesa of the derrick lower section is further provided with a dead rope fixer and an auxiliary winch, and the hydraulic winch can be detached after the derrick is lifted.

[0010] Preferably, the internal two-layer platforms are fixed to the inner side of the derrick two section through connecting bolts, and are used for supporting drilling operation equipment.

[0011] Preferably, the lifting sequence of the derrick main body section is from the derrick top section to the derrick coincident section, each section is lifted step by step through the hydraulic winch, and is locked through the connecting pin.

[0012] The working process of the utility model is as follows:

[0013] Derrick lower section installation: firstly, the four vertical legs of the derrick lower section are fixed to the mounting seat of the platform mesa through the derrick lower section connecting pin, so that the foundation is ensured to be stable.

[0014] Derrick coincident section nesting: the derrick coincident section is hoisted to the inside of the derrick lower section, and the four legs thereof are fixed with the legs of the derrick lower section through the connecting plate, so that a preliminary nesting structure is formed.

[0015] Main body section platform pre-installation: sequentially assemble the well derrick top section, the well derrick five section to the well derrick one section on the platform table, and temporarily lock each section through the well derrick section connecting pin, to form a segmented module.

[0016] Lifting system configuration: install a lifting pulley block under the upper two sides of the well derrick lower section, and connect it with the hydraulic winch on both sides of the platform through a steel wire rope; the guide pulley of the well derrick lower section leg ensures that the steel wire rope runs along the preset track.

[0017] Self-lifting type step-by-step lifting: start the hydraulic winch, pull the steel wire rope to drive the lifting pulley block, first lift the well derrick top section and the crown block to above the well derrick five section, and lock them through the connecting pin;

[0018] Repeat the operation, sequentially lift and connect the well derrick five section, four section to the well derrick one section step by step, and finally lift the well derrick coincident section to the designed height, and complete the final fixation through the connecting plate and the well derrick lower section.

[0019] Functional component integration: install the internal two-layer table in the well derrick two section through the connecting bolt, and simultaneously deploy the well derrick lower section ladder, the internal ladder and the top section ladder to form a complete operation channel.

[0020] Auxiliary equipment disassembly: after the well derrick main body lifting is completed, remove the hydraulic winch, retain the dead rope fixator and the auxiliary winch, and release the platform space.

[0021] The beneficial effects of the utility model are as follows:

[0022] (1) The utility model discloses a modular segmented design of the well derrick main body section, each section can be pre-installed on the platform table low position, synchronous traction lifting is realized through the hydraulic winch and the lifting pulley block, without relying on large hoisting equipment, installation cost and high-altitude operation risk are significantly reduced, and the utility model is suitable for narrow marine platform environment.

[0023] (2) The vertical leg design of the tower type well derrick and the accurate guidance of the guide pulley in the utility model ensure the linearity and positioning accuracy of the well derrick lifting track; the well derrick main body section cross section is a rectangular structure that decreases step by step, the overall wind and wave resistance is enhanced, and the strict requirement of deep sea drilling on stability is met.

[0024] (3) The utility model discloses that the ladder system and the two-layer table are integrated in the well derrick, the operation personnel passage path and equipment installation space are optimized; the hydraulic winch is detachable design, the platform occupied area is reduced, the dead rope fixator and the auxiliary winch cooperate to guarantee the operation safety, and efficient balance of function and space is realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the main view of the utility model structure.

[0026] Figure 2This is the FF sectional view of the main structural view of this utility model;

[0027] Figure 3 This is a GG sectional view of the main structural view of this utility model;

[0028] Figure 4 This is the structure of the utility model Figure 2 AA section view;

[0029] Figure 5 This is the structure of the utility model Figure 2 BB section view;

[0030] Figure 6 This is the structure of the utility model Figure 2 H-direction partial view;

[0031] Figure 7 This is a schematic diagram of the lifting process of the main structure of the derrick of this utility model;

[0032] In the diagram: 1. Lower section of derrick; 2. Overlapping section of derrick; 3. First section of derrick; 4. Second section of derrick; 5. Internal second-level platform; 6. Third section of derrick; 7. Fourth section of derrick; 8. Fifth section of derrick; 9. Top section of derrick; 10. Top section ladder; 11. Overhead crane; 12. Internal ladder; 13. Lower section ladder; 14. Lifting pulley block; 15. Hydraulic winch; 16. Dead rope fixing device; 17. Auxiliary winch; 101. Lower section connecting pin of derrick; 102. Mounting base; 103. Guide pulley; 141. Wire rope; 201. Connecting plate; 301. Connecting pins of each section of derrick; 401. Connecting bolt. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] like Figure 1As shown, a self-lifting tower-type derrick for offshore drilling rigs is disclosed. The derrick has a tower-shaped structure, with the main body consisting of a lower section 1 mounted on a platform. The four legs of the lower section 1 are connected to mounting seats 102 on the platform surface via lower section connecting pins 101. The lower section 1 contains a overlapping section 2, which is connected to a first section 3. The first section 3 is connected to a second section 4, the second section 4 to a third section 6, the third section 6 to a fourth section 7, the fourth section 7 to a fifth section 8, the fifth section 8 to a top section 9, and the top section 9 to a crane 11. The four legs of the lower section 1 are connected to the mounting seats 102 on the platform surface via the lower section connecting pins 101. The lower section 1 of the derrick contains a overlapping section 2, which is smaller than the lower section 1. The four legs of the overlapping section 2 are connected and fixed to the four legs of the lower section 1 via connecting plates 201. The first section 3 is the same size as the overlapping section 2. The upper parts of the four legs of the overlapping section 2 are connected to the lower parts of the four legs of the first section 3 via connecting pins 301. The second section 4 is the same size as the first section 3. The upper parts of the four legs of the first section 3 are connected to the lower parts of the four legs of the second section 4 via connecting pins 301. The third section 6 is the same size as the second section 4. The upper parts of the four legs of the second section 4 are connected to the lower parts of the four legs of the fourth section 7 via connecting pins 301. The dimensions of derrick section 7 are equal to those of derrick section 6. The upper parts of the four legs of derrick section 6 are connected to the lower parts of the four legs of derrick section 7 via derrick section connecting pins 301. The dimensions of derrick section 8 are equal to those of derrick section 7. The upper parts of the four legs of derrick section 7 are connected to the lower parts of the four legs of derrick section 8 via derrick section connecting pins 301. The dimensions of derrick top section 9 are equal to those of derrick section 8. The upper parts of the four legs of derrick section 8 are connected to the lower parts of the four legs of derrick top section 9 via derrick section connecting pins 301. The upper parts of the four legs of derrick top section 9 are connected to the overhead crane 11. Derrick top section ladder 10 is installed inside derrick top section 9. Dead rope anchor 16 and winch 17 are located outside derrick lower section 1 and connected to the platform. Derrick ladders 11 to 5 are installed inside derrick sections 3 to 8. The lower section 1 of the derrick is equipped with a ladder 13 on its outer side. Each of the two crossbeams on the upper part of the lower section 1 of the derrick is equipped with a set of lifting pulley blocks 14. The lifting pulley blocks 14 are connected to the lifting hydraulic winch 15 mounted on the platform on the outside of the lower section 1 of the derrick via steel wire ropes 141.

[0035] like Figure 2 As shown: To facilitate the entry of drill pipe into the derrick, the winch side of the lower section 1 of the derrick is designed with an open structure.

[0036] like Figure 3 As shown: To make a self-lifting tower-type derrick structure for marine drilling rigs more stable, the winch side of the lower section 1 of the derrick is designed as a frame structure.

[0037] As shown in Figure 4 : the second section of the derrick 4 is internally provided with an internal second floor 5, and the internal second floor 5 is connected with the second section of the derrick 4 through connecting bolts 401.

[0038] As shown in Figure 5 : the vertical sections of the four legs of the lower section of the derrick 1 are provided with guide pulleys 103 for guiding the derrick coincident section 2 to the derrick top section 9, which plays a guiding role when each section of the derrick is lifted in sections.

[0039] As shown in Figure 6 : after the lifting of the derrick coincident section 2 is completed, the four vertical legs of the lower section of the derrick 1 and the four legs below the derrick coincident section 2 are connected and fixed through the connecting plate 201.

[0040] As shown in Figure 7 : after the installation of the lower section of the derrick 1 is completed, the remaining structures of the derrick can be installed on the platform deck. First, the crown block 11 and the derrick top section 9 are connected and hoisted to the inside of the deck of the lower section of the derrick 1, and the hydraulic winches 15 on both sides are used to lift the derrick top section 9 to a height greater than the derrick fifth section 8. The derrick fifth section 8 is hoisted to below the derrick top section 9, and the derrick top section 9 and the derrick fifth section 8 are connected through the section connecting pins 301. The hydraulic winches 15 on both sides are used to lift the derrick fifth section 8 to a height greater than the derrick fourth section 7. The derrick fourth section 7 is hoisted to below the derrick fifth section 8, and the derrick fifth section 8 and the derrick fourth section 7 are connected through the section connecting pins 301. The hydraulic winches 15 on both sides are used to lift the derrick fourth section 7 to a height greater than the derrick third section 6. The derrick third section 6 is hoisted to below the derrick fourth section 7, and the derrick fourth section 7 and the derrick third section 6 are connected through the section connecting pins 301. The hydraulic winches 15 on both sides are used to lift the derrick third section 6 to a height greater than the derrick second section 4. The derrick second section 4 is hoisted to below the derrick third section 6, and the derrick third section 6 and the derrick second section 4 are connected through the section connecting pins 301. The hydraulic winches 15 on both sides are used to lift the derrick second section 4 to a height greater than the derrick third section 6. The derrick first section 3 is hoisted to below the derrick second section 4, and the derrick second section 4 and the derrick first section 3 are connected through the section connecting pins 301. The hydraulic winches 15 on both sides are used to lift the derrick first section 3 to a height greater than the derrick coincident section 2. The derrick coincident section 2 is hoisted to below the derrick first section 3, and the derrick first section 3 and the derrick coincident section 2 are connected through the section connecting pins 301. The hydraulic winches 15 on both sides are used to lift the derrick coincident section to the working height of the derrick. The four vertical legs of the lower section of the derrick 1 and the four legs of the derrick coincident section 2 are connected and fixed through the connecting plate 201.

[0041] The working process of the utility model is:

[0042] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0043] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0044] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0045] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0046] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0047] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0048] Lower section installation: first, the four vertical legs of the lower section 1 are fixed to the mounting seat 102 of the platform deck through the lower section connecting pin 101, ensuring the stability of the foundation.

[0049] The utility model discloses a low-position self-lifting lifting of the derrick is realized through segmented preinstallation, hydraulic synchronous traction and guiding positioning, the traditional large hoisting demand is avoided, the high-altitude operation risk and installation cost are reduced obviously, and the stability of tower type structure and internal equipment compatibility are ensured, and it is suitable for narrow marine platform environment.

[0050] The above is only the preferred example of the utility model. It should be pointed out that for ordinary skilled person in the art, under the technical inspiration provided by the utility model, as the common knowledge in the mechanical field, other equivalent variants and improvements can also be made, and should also be regarded as the protection scope of the utility model.

Claims

1. A self-erecting tower-type derrick for an offshore drilling rig, characterized in that, The derrick includes a lower section (1), a coincident section (2), a main section, a top section (9) and a crown block (11). The lower section (1) is fixed to a platform deck by four vertical legs, and the lower ends of the legs are connected to the platform mounting seat (102) by a lower section connecting pin (101). The lower section (1) is nested with the coincident section (2), and the four legs of the coincident section (2) are fixed to the legs of the lower section (1) by a connecting plate (201). The top of the coincident section (2) is sequentially connected with the main section, which includes a first section (3), a second section (4), a third section (6), a fourth section (7), a fifth section (8) and the top section (9). Each section is connected by a section connecting pin (301). Two lifting pulley blocks (14) are symmetrically installed below the upper side beams of the lower section (1), and the lifting pulley blocks (14) are connected to the hydraulic winches (15) on both sides of the platform deck by steel wires (141). The four legs of the lower section (1) are provided with guide pulleys (103) at the upper and lower ends for guiding the lifting of the main section. The lower section (1) is provided with a lower ladder (13) on the outside, the main section is provided with an internal ladder (12) inside, the top section (9) is provided with a top ladder (10) inside, and the second section (4) is provided with an internal second floor (5) inside.

2. A self-elevating tower-type rig for offshore drilling as defined in claim 1, characterized in that: The top view of the main section is rectangular, and the dimensions of the legs of the first section (3), the second section (4), the third section (6), the fourth section (7), the fifth section (8) and the top section (9) gradually decrease, the leg size of the coincident section (2) is smaller than that of the lower section (1), and the leg size of the top section (9) is consistent with that of the fifth section (8).

3. A self-elevating tower-type rig for offshore drilling according to claim 1 or 2, characterized in that: The steel wire (141) of the lifting pulley block (14) and the hydraulic winch (15) forms a closed loop traction system through the guide pulley (103), realizing the synchronous lifting and positioning of the main section.

4. A self-elevating tower-type rig for offshore drilling as defined in claim 3, characterized in that: The platform deck of the lower section (1) is also provided with a dead rope fixer (16) and an auxiliary winch (17), and the hydraulic winch (15) can be detached after the derrick is lifted.

5. A self-elevating tower-type rig for offshore drilling as defined in claim 4, characterized in that: The internal second floor (5) is fixed to the inside of the second section (4) by connecting bolts (401) and is used to support drilling equipment.

6. A self-elevating tower-type rig for offshore drilling as defined in claim 5, characterized in that: The lifting sequence of the main section is from the top section (9) to the coincident section (2), each section is lifted by the hydraulic winch (15) step by step, and is locked by the connecting pin (301).

Images