Well servicing riser top lift device

Abstract

The present application relates to a kind of well repair water pipe top lifting device, comprising: upper frame;Lower frame, interval is arranged below the upper frame, for connecting ground test tree and lower well repair equipment;Connecting leg assembly, the top of two connecting leg assemblies is fixed with the two sides of the upper frame respectively, and the bottom is fixed with the two sides of the lower frame respectively;Lifting nipple, set in the top of the upper frame, for connecting with top drive system;Lifting winch, set in the bottom of the upper frame, for connecting with lower tubing hanger system;Workbench, two sides are slidably connected with two connecting leg assemblies respectively, the workbench is used to prevent the horizontal movement of tubing injector head and can facilitate maintenance personnel to overhaul equipment on workbench.The present application is convenient for adjusting the length of overall frame, and it is convenient for worker construction, maintenance equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep-sea oil exploration, in particular to a well repair riser top lifting device. BACKGROUND

[0002] China has abundant deep-sea oil and gas resources, and the high cost of deepwater drilling and completion and post-repair is one of the key factors restricting the economic development of deepwater oil and gas fields, and efficient drilling and completion and light and low-cost repair technology is the continuous demand for the exploration and development of deepwater oil and gas fields.

[0003] Deepwater light repair can improve the mobility of repair operations and reduce the cost of deepwater repair, and has obvious technical advantages, and is a research hotspot in the international repair technology field. Although China has achieved localization in some relatively advanced oil and gas engineering equipment, there is currently no deepwater repair riser top lifting device in the field of deep-sea exploration. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a well repair riser top lifting device, which is convenient for adjusting the length of the overall frame and facilitates worker construction and maintenance equipment.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] The well repair riser top lifting device provided by the present application comprises: an upper frame; a lower frame, which is arranged below the upper frame and is used for connecting a surface test tree and a lower repair equipment; a connecting leg assembly, the top ends of two connecting leg assemblies are fixed to the two sides of the upper frame respectively, and the bottom ends are fixed to the two sides of the lower frame respectively; a lifting nipple, which is arranged at the top of the upper frame and is used for connecting a top drive system; a lifting winch, which is arranged at the bottom of the upper frame and is used for connecting a lower tubing hanging system; and a workbench, which is slidably connected to the two connecting leg assemblies respectively, and is used for preventing horizontal movement of a tubing injector head and facilitating maintenance personnel to repair the equipment on the workbench.

[0007] Preferably, the connecting leg assembly comprises an upper connecting leg, a middle connecting leg and a lower connecting leg; the top of the upper connecting leg is fixedly connected to the upper frame through a first connecting piece, and the bottom of the upper connecting leg is provided with a first docking plate; the top of the middle connecting leg is provided with a second docking plate, and the first docking plate and the second docking plate are fixed through a second connecting piece; the bottom of the middle connecting leg is provided with a third docking plate, the top of the lower connecting leg is provided with a fourth docking plate, and the third docking plate and the fourth docking plate are fixed through a third connecting piece; and the bottom of the lower connecting leg is fixedly connected to the lower frame through a fourth connecting piece.

[0008] Preferably, the first butt plate is provided with trapezoidal recesses on the front and back sides, and the second butt plate is provided with trapezoidal protrusions at the corresponding positions, and the trapezoidal recesses on the first butt plate are butted with the trapezoidal protrusions on the second butt plate when the upper connecting leg is butted with the middle connecting leg.

[0009] Preferably, the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are bolts.

[0010] Preferably, the lifting short section is fixed to the top of the upper frame through a connecting flange.

[0011] Preferably, the workbench comprises a concave bottom plate, a clamping plate and a guardrail, the concave bottom plate is provided with clamping plates on both sides, the clamping plates are clamped on the middle connecting legs of the connecting leg assembly, the end faces of the clamping plates away from the concave bottom plate protrude inwardly with sliding blocks, the middle connecting legs are provided with sliding grooves along the length direction, and the sliding blocks slide in the sliding grooves to adjust the position of the concave bottom plate, the clamping plates are locked through a fifth connecting piece after the concave bottom plate is arranged at a determined position, and the guardrail is arranged on the top of the concave bottom plate.

[0012] The present application has the following advantages due to the above technical solutions:

[0013] (1) The overall frame structure of the present application is compact, safe and reliable, different winches can be equipped according to requirements to adapt to the lifting of different tubing injection heads and ground blowout preventers;

[0014] (2) The connecting leg part of the present application adopts self-centering bolt connection, which is convenient for adjusting the length of the overall frame according to the actual application situation and disassembling, wherein the self-centering adopts a trapezoidal structure, which is convenient for centering and disassembling, increases the centering accuracy and saves time;

[0015] (3) The present application is light in weight, easy to transport and install, and directly interfaces with the ground test tree to obtain the minimum stacking height;

[0016] (4) The present application is equipped with a workbench, which is convenient for installing and maintaining equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present application thereto. Like reference numerals are used to denote like parts throughout the various figures. In the drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 is a schematic diagram of the connection of the upper connecting leg and the middle connecting leg of the present application, wherein the first docking plate and the second docking plate are in an unfixed state;

[0020] Figure 3 is a schematic diagram of the connection of the upper connecting leg and the middle connecting leg of the present application, wherein the first docking plate and the second docking plate are in a fixed state;

[0021] Figure 4 is a schematic diagram of the structure of the lifting ram of the present application;

[0022] Figure 5 is a schematic diagram of the structure of the workbench of the present application.

[0023] The various signs in the drawings represent the following:

[0024] 1 - upper frame; 2 - lower frame; 3 - connecting leg assembly; 301 - upper connecting leg; 302 - middle connecting leg; 303 - lower connecting leg; 4 - lifting ram; 5 - lifting winch; 6 - workbench; 601 - concave bottom plate; 602 - clamping plate; 603 - guardrail; 604 - sliding block; 7 - first connecting piece; 8 - first docking plate; 9 - second docking plate; 10 - second connecting piece; 11 - third docking plate; 12 - fourth docking plate; 13 - third connecting piece; 14 - fourth connecting piece; 15 - trapezoidal recess; 16 - trapezoidal protrusion; 17 - connecting flange; 18 - fifth connecting piece. DETAILED DESCRIPTION

[0025] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0026] The application provides a well repair water pipe top lifting device which is connected with a top driving system through a top lifting nipple, and a lifting winch is connected with a lower oil pipe suspension system.

[0027] As shown in the drawings, Figure 1 The well repair water pipe top lifting device provided by the application comprises an upper frame 1, a lower frame 2 which is arranged below the upper frame 1 and used for connecting a ground test tree and lower well repair equipment, two connecting leg assemblies 3, a lifting nipple 4 arranged at the top of the upper frame 1 and used for being connected with a top driving system, a lifting winch 5 arranged at the bottom of the upper frame 1 and used for being connected with a lower oil pipe suspension system, and a workbench 6 which is slidably connected with the two connecting leg assemblies 3 at the two sides and used for preventing horizontal movement of an oil pipe injection head and facilitating maintenance personnel to overhaul the equipment on the workbench.

[0028] In the above embodiment, preferably, the connecting leg assembly 3 comprises an upper connecting leg 301, a middle connecting leg 302 and a lower connecting leg 303; the top of the upper connecting leg 301 is fixedly connected with the upper frame 1 through a first connecting piece 7, and the bottom of the upper connecting leg 301 is provided with a first butt joint plate 8; the top of the middle connecting leg 302 is provided with a second butt joint plate 9, and the first butt joint plate 8 and the second butt joint plate 9 are fixed through a second connecting piece 10; the bottom of the middle connecting leg 302 is provided with a third butt joint plate 11, the top of the lower connecting leg 303 is provided with a fourth butt joint plate 12, and the third butt joint plate 11 and the fourth butt joint plate 12 are fixed through a third connecting piece 13; and the bottom of the lower connecting leg 303 is fixedly connected with the lower frame 2 through a fourth connecting piece 14. Thus, the connecting leg assembly is convenient to disassemble, and the size of the overall frame can be changed according to requirements.

[0029] It should be noted that the middle connecting leg 302 can also be spliced by a plurality of connecting leg parts, and the connecting mode is the same as the above connecting mode.

[0030] In the above embodiment, preferably, as shown in the drawings, Figure 2 and Figure 3 The front and rear sides of the first butt joint plate 8 are provided with trapezoidal recesses 15, and the corresponding positions of the second butt joint plate 9 are provided with trapezoidal protrusions 16; when the upper connecting leg 301 and the middle connecting leg 302 are butted, the trapezoidal recesses 15 on the first butt joint plate 8 are butted with the trapezoidal protrusions 16 on the second butt joint plate 9;

[0031] Similarly, the third butt plate 11 is also provided with trapezoidal recesses 15 on the front and back sides, and the fourth butt plate 12 is also provided with trapezoidal protrusions 16 at the corresponding positions, when the middle connecting leg 302 and the lower connecting leg 303 are butted, the trapezoidal recesses 15 on the third butt plate 11 are butted with the trapezoidal protrusions 16 on the fourth butt plate 12. Thus, the centering and disassembly are facilitated, the centering accuracy is increased, and the time is saved.

[0032] In the above embodiment, preferably, the first connecting piece 7, the second connecting piece 10, the third connecting piece 13 and the fourth connecting piece 14 are bolts respectively.

[0033] In the above embodiment, preferably, as shown in the figure, Figure 4 The lifting short section 4 is fixed to the top of the upper frame 1 through the connecting flange 17.

[0034] In the above embodiment, preferably, as shown in the figure, Figure 5 The workbench 6 comprises a concave bottom plate 601, a clamping plate 602 and a guardrail 603; the two sides of the concave bottom plate 601 are respectively provided with the clamping plates 602, the clamping plates 602 are clamped on the middle connecting leg 302 of the connecting leg assembly 3, the sliding block 604 is protruded inward from the end face of the clamping plate 602 away from the concave bottom plate 601, the middle connecting leg 302 is provided with a sliding groove along the length direction, and the sliding block 604 slides in the sliding groove, so that the position of the concave bottom plate 601 is adjustable; after the concave bottom plate 601 is arranged at a determined position, the clamping plate 602 is locked through the fifth connecting piece 18; and the guardrail 603 is arranged on the top of the concave bottom plate 601. Thus, the first function of the workbench is to prevent the horizontal movement of the tubing injector, and the second function is to facilitate the maintenance personnel to overhaul the equipment on the workbench.

[0035] The well repair water pipe top lifting device has a suitable working window, so that the tubing hanger system parts such as the tubing injector, the blowout preventer and the surface blowout preventer can work normally without being affected by the ship motion; at present, according to the size and weight of the existing tubing hanger system, the size, bearing capacity and material of the lifting frame can be adjusted accordingly and the finite element analysis is carried out to determine that the overall frame meets the requirements; the workbench with adjustable height is arranged in the working window, one function of the workbench is to prevent the horizontal movement of the tubing injector, and the second function is to facilitate the maintenance personnel to overhaul the equipment on the workbench; the parts of the connecting leg assembly of the lifting device are connected by bolts, in order to meet the strength requirements, the load borne by each bolt is calculated, the bolt type is determined according to the relevant industry specifications, the bolts are connected, the disassembly is facilitated, the size of the overall frame can be changed according to the requirements; the frame is provided with a winch for installing the steel wire rope and the well repair water pipe equipment and other connecting equipment, the winch can be hoisted and the speed is greater than the heave operation of the ship body. The load capacity of the winch is at least 30% higher than the maximum hoisting weight.

[0036] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A workover string riser lifting device characterized by, The utility model relates to a well test tree and lower workover equipment connecting device, which comprises: an upper frame; a lower frame arranged below the upper frame and used for connecting the well test tree and the lower workover equipment; two connecting leg assemblies, the top ends of which are fixed to the two sides of the upper frame respectively, and the bottom ends of which are fixed to the two sides of the lower frame respectively; a lifting nipple arranged at the top of the upper frame and used for connecting a top drive system; a lifting winch arranged at the bottom of the upper frame and used for connecting a lower tubing hanger system; a workbench, the two sides of which are slidably connected to the two connecting leg assemblies respectively, the workbench being used for preventing horizontal movement of a tubing injector and facilitating maintenance personnel to overhaul equipment on the workbench; wherein the connecting leg assembly comprises an upper connecting leg, a middle connecting leg and a lower connecting leg; the top of the upper connecting leg is fixedly connected to the upper frame through a first connecting piece, and the bottom of the upper connecting leg is provided with a first docking plate; the top of the middle connecting leg is provided with a second docking plate, and the first docking plate and the second docking plate are fixed through a second connecting piece; the bottom of the middle connecting leg is provided with a third docking plate, the top of the lower connecting leg is provided with a fourth docking plate, and the third docking plate and the fourth docking plate are fixed through a third connecting piece; the bottom of the lower connecting leg is fixedly connected to the lower frame through a fourth connecting piece; the front and back sides of the first docking plate are provided with trapezoidal recesses, and the corresponding positions of the second docking plate are provided with trapezoidal protrusions, the trapezoidal recesses on the first docking plate being docked with the trapezoidal protrusions on the second docking plate when the upper connecting leg is docked with the middle connecting leg; the front and back sides of the third docking plate are also provided with trapezoidal recesses, and the corresponding positions of the fourth docking plate are also provided with trapezoidal protrusions, the trapezoidal recesses on the third docking plate being docked with the trapezoidal protrusions on the fourth docking plate when the middle connecting leg is docked with the lower connecting leg; wherein the workbench comprises a concave bottom plate, a clamping plate and a guardrail; the two sides of the concave bottom plate are provided with clamping plates respectively, the clamping plates are clamped on the middle connecting legs of the connecting leg assemblies, the end faces of the clamping plates away from the concave bottom plate protrude inwardly with sliding blocks, the middle connecting legs are provided with sliding grooves along the length direction of the middle connecting legs, and the sliding blocks slide in the sliding grooves, so that the position of the concave bottom plate is adjustable; after the concave bottom plate is arranged at a determined position, the clamping plates are locked through a fifth connecting piece; the guardrail is arranged at the top of the concave bottom plate.

2. The workover string swabbing device of claim 1, wherein, The first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are bolts respectively.

3. The workover string swabbing device of claim 1, wherein, The lifting nipple is fixed to the top of the upper frame through a connecting flange.

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