Integrated derrick of under-pressure operation machine

Abstract

The utility model discloses an integrated derrick of an under-pressure operation machine. The integrated derrick comprises a prying frame, a wellhead support, a main operation table, an auxiliary operation table, an upper base plate, a lower base plate and hydraulic cylinder stand columns. The upper base plate is fixedly connected to the top of the prying frame, the lower base plate is fixedly connected to the middle of the prying frame, the two ends of the four sets of hydraulic cylinder stand columns are fixedly connected with the upper base plate and the lower base plate respectively, the top end of the wellhead support is fixedly connected with the lower base plate, and the side face of the bottom end of the wellhead support is fixedly connected with the bottom of the prying frame. The prying frame, the well mouth support, the upper base plate, the lower base plate and the four sets of hydraulic cylinder stand columns form a rigid frame body of the integrated derrick. Most load or all load of the under-pressure operation machine can be transmitted to the prying frame and the well mouth support to be borne, and the potential safety hazard that an original well mouth device is crushed due to the fact that the original well mouth device bears large load is fundamentally eliminated; and the problem of deformation and leakage of the sealing ring of the connecting flange caused by alternating load is fundamentally solved.

Description

Technical Field

[0001] The utility model belongs to the field of petroleum and natural gas downhole operation equipment, and in particular relates to an integrated derrick of a pressure-operated machine. Background Art

[0002] Oil and gas well pressure operation refers to a special operation in which professionals operate pressure operation machines to raise and lower pipe strings under pressure in the wellbore. It has the characteristics of high operation risks and high safety construction requirements. At present, typical pressure operation machines at home and abroad are not equipped with derricks. The load of the lifting operation is transferred from four hydraulic cylinder columns (lifting / pressurized hydraulic cylinders) to the lower base plate, and then transferred to the original wellhead device through the conversion flange seat. The load of the fixed slips (including fixed working slips and fixed heavy slips) is directly applied to the original wellhead device through the spherical blowout preventer group, working gate, etc., resulting in the entire operation The load and the entire weight of the pressure operation machine device act on the original wellhead device.

[0003] In the prior art, the upper and lower base plates of the pressure working machine and four hydraulic cylinder columns (lifting / pressurizing hydraulic cylinders) form the basic force-bearing frame of the pressure working machine, and the upper and lower working platforms are installed on the frame, and together with the hydraulic power control system, lifting system, and annular space sealing system, the most basic structure of the pressure working machine is formed. However, the existing pressure working machine still has the following shortcomings.

[0004] 1. In the existing pressure-operated machine, since the upper end of the fixed working slip is not fixed, its upper end is a free end. If the force is eccentric, a large torque will be generated, thereby damaging the original wellhead device.

[0005] 2. In the existing pressure-operating machine, the entire load of the operation and the entire weight of the pressure-operating machine device act on the original wellhead device. Therefore, the load of the original wellhead device determines the operating capacity of the pressure-operating machine, which greatly limits the capacity of the pressure-operating machine. In addition, because the original wellhead device, such as the Christmas tree and the oil casing head, was not designed with the upper load bearing operation load in mind, and the casing is generally suspended in the casing head by a wedge-shaped slip, the upper force will cause it to withdraw from the slip, loosening the casing head and the casing, and thus causing the pressure-operating machine to overturn, or even crush the wellhead.

[0006] 3. In the existing pressure-operated machines, the operating load also forms an alternating load due to the alternating action of the moving slips and the fixed slips. Although the flange sealing design takes into account the plastic deformation of the sealing ring steel ring, it is an effective seal produced under a predetermined clamping force, and the alternating load will repeatedly change the stress condition of the flange, which can easily cause permanent deformation of the flange and lose the sealing effect. At present, the site usually adjusts the steel ring preload by continuously tightening the screw to avoid flange leakage, but it does not fundamentally solve the technical problem of deformation of the flange sealing ring caused by the alternating load.

[0007] 4. In the existing pressure-operated machine, the upper working platform is located directly above the wellhead, and the control pipeline valve components are arranged around the wellhead equipment, which is in the blowout impact area, which is not conducive to the protection of the operator and also occupies the installation and maintenance space of the pressure-operated machine. At the same time, there are many elbows in the pipeline and the hose pipeline is long, the flow resistance of the hydraulically controlled working fluid is large, and the flow efficiency is low.

[0008] 5. In the existing pressure working machine, the problem of temperature rise of the cylinder column is solved by cooling the hydraulic oil, but this cooling method is not conducive to the smooth operation of the cylinder column and the protection of the hydraulic oil hose.

[0009] 6. In the existing pressure working machine, a special transport skid is required for transportation, and the annular seal system of the pressure working machine has no fixed support, which is easy to loosen and eccentric during transportation, causing damage to the pressure working machine. Moreover, the pressure working machine needs to be reinstalled when disassembling, which is very labor-intensive.

[0010] Therefore, based on the current status of belt pressure working machines, there is an urgent need for a belt pressure working machine device that solves the above problems. Utility Model Content

[0011] In order to solve the above problems existing in the prior art, the utility model provides an integrated derrick of a pressure-operated machine.

[0012] The technical solution adopted by the utility model is:

[0013] An integrated derrick of a pressure-operating machine, the integrated derrick comprising: a skid, a wellhead support, a main operating platform, an auxiliary operating platform, an upper base plate, a lower base plate, and a cylinder column; the main operating platform is located on the upper base plate, and the auxiliary operating platform is located on the lower base plate; the upper base plate is fixedly connected to the top of the skid, the lower base plate is fixedly connected to the middle of the skid, the number of the cylinder columns is four groups, both ends of the four groups of cylinder columns are respectively fixedly connected to the upper base plate and the lower base plate, the top of the wellhead support is fixedly connected to the lower base plate, the bottom side of the wellhead support is fixedly connected to the bottom of the skid, the skid, the wellhead support, the upper base plate, the lower base plate, and the four groups of cylinder columns constitute the rigid frame body of the integrated derrick; the upper base plate comprises an upper conversion flange, and the fixed slips of the pressure-operating machine are connected to the upper conversion flange; the lower base plate comprises a lower conversion flange, and the spherical blowout preventer group of the pressure-operating machine is connected to the lower conversion flange.

[0014] Preferably, both the upper conversion flange and the lower conversion flange are provided with a force monitoring device.

[0015] Preferably, the skid frame is a truss structure, and auxiliary parts such as hydraulic pipelines, pipe joints, and control valve groups of the pressure working machine are centrally installed inside the skid frame.

[0016] Preferably, the integrated derrick further comprises a fireproof and blowout-proof wall, which is located between the skid frame and the main operating platform and the auxiliary operating platform, and is fixed to the main beam of the skid frame and extends from the bottom of the skid frame to the top of the skid frame.

[0017] Preferably, the integrated derrick further comprises an equipment operating platform, which is located on the back side of the skid frame and hinged to the top of the skid frame, and the equipment operating platform is located at the same height as the main operating platform.

[0018] Preferably, the integrated derrick further comprises an isolation plate, which is fixed to the top of the skid frame and is located between the equipment operating platform and the main operating platform.

[0019] Preferably, a coolant inlet and a coolant outlet are respectively provided at both ends of the cylinder column.

[0020] Preferably, the integrated derrick further comprises a main widening platform, and the main widening platform is hinged to the main operating platform.

[0021] Preferably, the integrated derrick further comprises an auxiliary widening platform, and the auxiliary widening platform is hinged to the auxiliary operating platform.

[0022] Compared with the prior art, the utility model has the following beneficial effects.

[0023] 1. Most or all of the load of the pressure-operating machine is transferred to the skid frame and the wellhead bracket, which avoids the original wellhead device from bearing a large load, protects the integrity of the original imported device, and fundamentally eliminates the safety hazards of wellhead leakage or even wellhead collapse.

[0024] 2. The fixed slips of the pressure working machine are connected to the upper conversion flange, which avoids the risk of the pressure working machine overturning due to the large torque caused by the free end of the fixed slips.

[0025] 3. The skid is a truss structure. The hydraulic pipelines, pipe fittings, control valve groups, etc. of the pressure-operating machine are centrally installed inside the skid and isolated from the wellhead, which prevents these control pipeline valve components from being within the impact range of the blowout. If a blowout accident occurs, these control pipeline valve components will not lose control, further improving the inherent safety of the pressure-operating machine. At the same time, there are no control pipeline valve components around the wellhead device, which also provides operators with a wider operating space for maintaining the wellhead.

[0026] 4. The hydraulic cylinder column adopts the cooling method of cooling the hydraulic oil with coolant, which ensures the smooth operation of the hydraulic cylinder column and solves the problem of aging of hydraulic hose caused by high temperature of hydraulic oil.

[0027] 5. The skid frame integrates the functions of derrick fixing and transport skid, and fixes the pipeline valve components in a classified manner, avoiding the construction period problems caused by disassembling and assembling accessories and installing transport skids when moving the pressure-operated machine. There is no need to configure additional transport skids, which saves transportation costs and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is an integrated derrick stereoscopic Figure 1 .

[0029] Figure 2 The utility model is an integrated derrick three-dimensional Figure 2 .

[0030] Figure 3 The utility model is an integrated derrick three-dimensional Figure 3 .

[0031] Figure 4 It is a schematic diagram of the installation between the integrated derrick and the pressure working equipment of the pressure working machine in the utility model.

[0032] Figure 5 It is a schematic diagram of the hydraulic cylinder column in the utility model.

[0033] Figure 6 It is a schematic diagram of transporting the belt pressure working machine in the utility model.

[0034] In the figure, 1. skid frame, 2. wellhead support, 3. main operating table, 4. auxiliary operating table, 5. upper base plate, 6. lower base plate, 7. hydraulic cylinder column, 8. fire and blowout wall, 9. isolation plate, 10. upper conversion flange, 11. lower conversion flange, 12. fixed slip, 13. spherical blowout preventer group, 14. original wellhead device, 15. equipment operating table, 16. coolant inlet, 17. coolant outlet, 18. main widening table, 19. auxiliary widening table. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0037] The following is combined with Figure 1-6 The specific implementation mode of the utility model is described.

[0038] The present embodiment provides an integrated derrick of a pressure-operating machine, which includes: a skid frame 1, a wellhead support 2, a main operating platform 3, an auxiliary operating platform 4, an upper base plate 5, a lower base plate 6, a hydraulic cylinder column 7, etc.; the main operating platform 3 is located on the upper base plate 5, and the auxiliary operating platform 4 is located on the lower base plate 6.

[0039] The upper base plate 5 is fixedly connected to the top of the skid frame 1, the lower base plate 6 is fixedly connected to the middle of the skid frame 1, there are four groups of hydraulic cylinder columns 7, both ends of the four groups of hydraulic cylinder columns 7 are respectively fixedly connected to the upper base plate 5 and the lower base plate 6, the top of the wellhead bracket 2 is fixedly connected to the lower base plate 6, and the bottom side of the wellhead bracket 2 is fixedly connected to the bottom of the skid frame 1; the skid frame 1, the wellhead bracket 2, the upper base plate 5, the lower base plate 6, and the four groups of hydraulic cylinder columns 7 constitute the rigid frame body of the integrated derrick, further improving the rigidity of the integrated derrick.

[0040] The upper base plate 5 includes an upper conversion flange 10 , to which the fixed slips 12 of the belt pressure working machine are connected; the lower base plate 6 includes a lower conversion flange 11 , to which the spherical blowout preventer group 13 of the belt pressure working machine is connected.

[0041] Then the gravity of the fixed slips 12 and the annular space control equipment above it is borne by the upper base plate 5 and the spherical blowout preventer group 13 respectively, wherein the force borne by the upper base plate 5 is respectively transmitted to the skid frame 1 and the four groups of hydraulic cylinder columns 7 for bearing, and the force borne by the four groups of hydraulic cylinder columns 7 is then transmitted to the lower base plate 6 for bearing. The gravity of the fixed slips 12 and the annular space control equipment above it is transmitted to the spherical blowout preventer group 13, the gravity of the spherical blowout preventer group 13 and the annular space control equipment below it, and the operating load of the pressure-operating machine are respectively borne by the lower base plate 6 and the original wellhead device 14. Among them, the force borne by the lower base plate 6 (including the force transmitted to the lower base plate 6 by the four groups of hydraulic cylinder columns 7) is respectively transmitted to the skid frame 1 and the wellhead support 2 for bearing. That is, all the loads of the pressure-operating machine are borne by the skid frame 1, the wellhead support 2, and the original wellhead device 14.

[0042] The upper conversion flange 10 and the lower conversion flange 11 are both provided with force monitoring devices, wherein the force of the upper conversion flange 10 is the force of the upper base plate 5, and the force of the lower conversion flange 11 is the force of the lower base plate 6; the gravity transmitted to the spherical blowout preventer group 13 by the fixed slips 12 and its upper annulus control equipment is adjusted by adjusting the force of the upper conversion flange 10; the force borne by the original wellhead device 14 is adjusted by adjusting the force of the lower conversion flange 10, that is, the force borne by the original wellhead device 14 can also be adjusted to zero, that is, all loads of the pressure operation machine are transmitted to the skid frame 1 and the wellhead bracket 2 for bearing.

[0043] The skid 1 is a truss structure, which effectively improves the rigidity of the integrated derrick. The hydraulic pipelines, pipe joints, control valve groups, etc. of the pressure-operating machine are centrally installed inside the skid 1, avoiding the wellhead safety problems and small working space problems caused by the arrangement of these auxiliary parts around the wellhead equipment; at the same time, it also avoids the construction period problems caused by the disassembly and assembly of auxiliary parts when the pressure-operating machine is moved.

[0044] The integrated derrick also includes a fireproof and anti-blowout wall 8, an isolation board 9, and an equipment operating table 15. The equipment operating table 15 is located on the back side of the skid frame 1 and is hinged to the top of the skid frame 1. The equipment operating table 15 and the main operating table 3 are located at the same height. The isolation board 9 is fixed to the top of the skid frame 1 and is located between the equipment operating table 15 and the main operating table 3. The fireproof and anti-blowout wall 8 is located between the skid frame 1 and the main and auxiliary operating tables, and is fixed to the main beam of the skid frame 1 and extends from the bottom of the skid frame 1 to the top of the skid frame 1. The isolation board 9 and the fireproof and anti-blowout wall 8 form an isolation device, which isolates the on-site operator and auxiliary parts such as hydraulic pipelines, pipe joints, and control valve groups from the wellhead, effectively isolating the dangers caused by accidents such as wellhead fires and blowouts, and providing a safer and more reliable working environment.

[0045] The two ends of the cylinder column 7 are respectively provided with a coolant inlet 16 and a coolant outlet 17. Figure 5 As shown, the hydraulic oil is cooled by heat exchange between the coolant and the hydraulic oil, thereby ensuring the smooth operation of the cylinder column and solving the problem of aging of the hydraulic hose caused by the high temperature of the hydraulic oil.

[0046] The integrated derrick further comprises a main widening platform 18 and an auxiliary widening platform 19, which are respectively hinged to the main operating platform 3 and the auxiliary operating platform 4, thereby further increasing the working space.

[0047] The working principle of the utility model is:

[0048] When the pressure-operated machine is working, the forces on the upper conversion flange 10 and the lower conversion flange 11 are monitored in real time. When the force on the upper conversion flange 10 is too large or too small, the connection state of the upper conversion flange 10 is adjusted to reduce the force on the upper conversion flange 10, that is, to increase the gravity transmitted to the spherical blowout preventer group 13 by adjusting the fixed slips 12 and its upper annulus control equipment; or to increase the force on the upper conversion flange 10, that is, to reduce the gravity transmitted to the spherical blowout preventer group 13 by adjusting the fixed slips 12 and its upper annulus control equipment.

[0049] When the force on the lower conversion flange 11 is too large or too small, the connection state of the lower conversion flange 11 is adjusted to reduce the force on the lower conversion flange 11, that is, to increase the force on the original wellhead device 14; or to increase the force on the lower conversion flange 11, that is, to reduce the force on the original wellhead device 14. The integrated derrick of the utility model can adjust the connection state of the lower conversion flange 11 to a state where the force on the original wellhead device 14 is zero, that is, all the loads of the pressure operation machine are transferred to the skid frame 1 and the wellhead bracket 2 for bearing.

[0050] When moving a pressurized machine, Figure 6 As shown, the hinged equipment operating table 15, the main widening table 18, and the auxiliary widening table 19 are in a folded state, and the skid frame 1 can be used as a transport skid for the integrated derrick of the utility model. When transporting, no additional transport skid is required, and the integrated derrick only needs to be laid down. The skid frame 1 serves as a transport skid to bear the weight of the entire device, saving transportation costs and time.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. An integrated derrick of a pressure-operated machine, characterized in that: The integrated derrick comprises: a skid frame (1), a wellhead support (2), a main operating table (3), an auxiliary operating table (4), an upper base plate (5), a lower base plate (6), and a hydraulic cylinder column (7); the main operating table (3) is located on the upper base plate (5), and the auxiliary operating table (4) is located on the lower base plate (6); the upper base plate (5) is fixedly connected to the top of the skid frame (1), and the lower base plate (6) is fixedly connected to the middle of the skid frame (1); the number of the hydraulic cylinder columns (7) is four, and both ends of the four groups of hydraulic cylinder columns (7) are respectively fixedly connected to the upper base plate (5) and the lower base plate (6); the wellhead support ( The top of the wellhead support (2) is fixedly connected to the lower base plate (6), the bottom side of the wellhead support (2) is fixedly connected to the bottom of the skid frame (1), and the skid frame (1), the wellhead support (2), the upper base plate (5), the lower base plate (6), and the four groups of hydraulic cylinder columns (7) constitute a rigid frame body of the integrated derrick; the upper base plate (5) includes an upper conversion flange (10), and the fixed slips (12) of the pressure working machine are connected to the upper conversion flange (10); the lower base plate (6) includes a lower conversion flange (11), and the spherical blowout preventer group (13) of the pressure working machine is connected to the lower conversion flange (11).

2. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: The upper conversion flange (10) and the lower conversion flange (11) are both provided with a force monitoring device.

3. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: The skid frame (1) is a truss structure, and the hydraulic pipelines, pipe fittings, and control valve groups of the pressure working machine are centrally installed inside the skid frame (1).

4. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: The integrated derrick further comprises a fireproof and blowout-proof wall (8), which is located between the skid frame (1) and the main operating table (3) and the auxiliary operating table (4), and is fixed to the main beam of the skid frame (1) and extends from the bottom of the skid frame (1) to the top of the skid frame (1).

5. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: The integrated derrick further comprises an equipment operating platform (15), wherein the equipment operating platform (15) is located on the back side of the skid frame (1) and is hinged to the top of the skid frame (1), and the equipment operating platform (15) is located at the same height as the main operating platform (3).

6. The integrated derrick of a belt pressure operation machine according to claim 5, characterized in that: The integrated derrick further comprises an isolation plate (9), wherein the isolation plate (9) is fixed to the top of the skid frame (1) and is located between the equipment operating platform (15) and the main operating platform (3).

7. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: A cooling liquid inlet (16) and a cooling liquid outlet (17) are respectively provided at both ends of the cylinder column (7).

8. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: The integrated derrick further comprises a main widening platform (18), wherein the main widening platform (18) is hingedly connected to the main operating platform (3).

9. The integrated derrick of a belt pressure operation machine according to claim 1, characterized in that: The integrated derrick further comprises an auxiliary widening platform (19), wherein the auxiliary widening platform (19) is hingedly connected to the auxiliary operating platform (4).

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