Derrick for full-hydraulic workover rig

Abstract

The utility model relates to the technical field of workover rigs, and discloses a full-hydraulic workover rig derrick which comprises an outer gantry, an inner gantry is slidably connected to the inner wall of the outer gantry, first hydraulic rods are fixedly connected to the front side and the rear side of the left end of the outer gantry respectively, and first connecting columns are fixedly connected to the top ends of the first hydraulic rods respectively. A first lifting assembly is arranged on the outer wall of the first connecting column, a second hydraulic rod is fixedly connected to the inner wall of the inner portal, a second connecting column is fixedly connected to the top end of the second hydraulic rod, the second connecting column is connected with the supporting platform through a second lifting assembly, and an expansion assembly is arranged on the inner wall of the supporting platform. According to the lifting device, the inner portal frame ascends and descends in the outer portal frame, the supporting platform ascends and descends in the inner portal frame, secondary ascending and descending of the supporting platform are achieved, meanwhile, transmission is conducted through the movable pulley and the chain, the stroke is increased, the ascending and descending height is prevented from being affected by the stroke of the hydraulic rod, and large-height ascending and descending are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to well repair machine technical field especially relates to a well rig for full hydraulic well repair machine. BACKGROUND

[0002] The well rig for full hydraulic well repair machine is the key equipment in the well repair operation in the energy exploitation field of petroleum, natural gas and the like, bears the important tasks such as placing headstock, suspending travelling block, big hook and the like in the well repair process, and hoisting and storing drill pipe, oil pipe and sucker rod, and its performance advantage and disadvantage directly influence the safety and efficiency of well repair operation.

[0003] In the well repair machine equipment field, the conventional hydraulic lifting structure is limited by the stroke of hydraulic rod, and it is difficult to realize large height lifting, for example, if the conventional hydraulic lifting platform needs to reach 5m lifting height, the hydraulic rod needs to have 5m stroke synchronously, which not only leads to the initial height of equipment being too high, but also the long-stroke hydraulic rod has high manufacturing cost and great maintenance difficulty.

[0004] In view of the technical problem that the hydraulic lifting structure is limited by the stroke of hydraulic rod and it is difficult to realize large height lifting, the utility model provides a well rig for full hydraulic well repair machine. UTILITY MODEL CONTENTS

[0005] The utility model discloses a well rig for full hydraulic well repair machine, which is used to solve the problem of the hydraulic lifting structure being limited by the stroke of hydraulic rod and difficult to realize large height lifting. The inner derrick is lifted inside the outer derrick, and the support platform is lifted inside the inner derrick to realize secondary lifting of the support platform. The transmission is realized through the movable pulley and the chain to increase the stroke, avoid the lifting height being affected by the stroke of the hydraulic rod itself, realize large height lifting, and make the overall size of the support platform larger to flexibly expand the operation area and meet the placement requirements of different specifications of loads.

[0006] To achieve the above object, the utility model provides the following technical scheme: a well rig for full hydraulic well repair machine, which comprises an outer derrick, an inner derrick is slidably connected to the inner wall of the outer derrick, first hydraulic rods are fixedly connected to the left end of the outer derrick on the front and back sides, first connecting columns are fixedly connected to the top end of the first hydraulic rods, a first lifting assembly is arranged on the outer wall of the first connecting column, a second hydraulic rod is fixedly connected to the inner wall of the inner derrick, a second connecting column is fixedly connected to the top end of the second hydraulic rod, the second connecting column is connected to a support platform through a second lifting assembly, and an expansion assembly is arranged on the inner wall of the support platform.

[0007] Further, the first lifting assembly comprises a first movable pulley rotatably connected to the outer wall of the first connecting column, first support plates are fixedly connected to the left end of the inner derrick on the front and back sides, first chains are fixedly connected to the top end of the first support plates, and the first chains are sleeved on the outer wall of the first movable pulley.

[0008] Further, the first chain is fixedly connected with a connecting frame at the other end, the connecting frame is fixedly connected to the outer wall of the outer door frame, and the outer wall of the first connecting column is fixedly connected with a stabilizing frame.

[0009] Further, the second lifting assembly comprises a second movable pulley rotatably connected to the outer wall of the second connecting column on both sides, second supporting plates are fixedly connected to the front and rear sides of the right end of the inner door frame, second chains are fixedly connected to the top ends of the second supporting plates, and the second chains are sleeved on the outer wall of the second movable pulley.

[0010] Further, the second chain is fixedly connected with a third supporting plate at the other end, and the right end of the third supporting plate is fixedly connected to the left end of the supporting platform.

[0011] Further, the expansion assembly comprises a third hydraulic rod fixedly connected to the inner wall of the supporting platform, and the right end of the third hydraulic rod is fixedly connected with an expansion plate, and the outer wall of the expansion plate is slidably connected to the inner wall of the supporting platform.

[0012] Further, the top ends of the supporting platform and the expansion plate are respectively fixedly connected with a first fence and a second fence, and the outer wall of the second fence is slidably connected to the inner wall of the first fence.

[0013] Further, the left end of the supporting platform is fixedly connected with a sliding block on the front and rear sides, and the outer wall of the sliding block is slidably connected to the inner wall of the inner door frame.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] 1、in the utility model, through the inner door frame in the outer door frame is lifted, in through the supporting platform in the inner door frame is lifted, realize the secondary lifting of supporting platform, simultaneously through movable pulley and chain to drive, realize the increase stroke, avoid lifting height to be influenced by the stroke of hydraulic rod itself, realize big height lifting.

[0016] 2、in the utility model, through the third hydraulic rod moves the expansion plate to the outside of supporting platform, thereby the overall size of supporting platform is bigger, makes supporting platform can place more articles, thereby flexible expansion work area, satisfies the placing demand of different specifications load. DRAWINGS

[0017] Figure 1 a perspective view of a well frame for a full hydraulic workover rig is provided for the utility model;

[0018] Figure 2 a first chain schematic view of a well frame for a full hydraulic workover rig is provided for the utility model;

[0019] Figure 3 A second hydraulic rod schematic view of a derrick for a full hydraulic workover rig is provided in the utility model;

[0020] Figure 4 A second chain schematic view of a derrick for a full hydraulic workover rig is provided in the utility model;

[0021] Figure 5 A support platform sectional view of a derrick for a full hydraulic workover rig is provided in the utility model.

[0022] Legend:

[0023] 1, outer portal; 2, inner portal; 3, first hydraulic rod; 4, first connecting column; 5, first movable pulley; 6, connecting frame; 7, first chain; 8, first support plate; 9, stabilizing frame; 10, second hydraulic rod; 11, second connecting column; 12, second movable pulley; 13, second support plate; 14, second chain; 15, third support plate; 16, support platform; 17, sliding block; 18, first fence; 19, third hydraulic rod; 20, expansion plate; 21, second fence. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Referring to Figures 1-3 , the utility model provides an embodiment: a derrick for a full hydraulic workover rig, including outer portal 1, the inner wall of outer portal 1 is slidably connected with inner portal 2, and the left end of outer portal 1 is fixedly connected with first hydraulic rod 3 on the two sides, and the top end of first hydraulic rod 3 is fixedly connected with first connecting column 4, and the outer wall of first connecting column 4 is rotatably connected with first movable pulley 5, and the left end of inner portal 2 is fixedly connected with first support plate 8 on the two sides, and the top end of first support plate 8 is fixedly connected with first chain 7, and first chain 7 is sleeved on the outer wall of first movable pulley 5, and the other end of first chain 7 is fixedly connected with connecting frame 6, and connecting frame 6 is fixedly connected to the outer wall of outer portal 1 on the inner side, and the outer wall of first connecting column 4 is fixedly connected with stabilizing frame 9, and the inner wall of inner portal 2 is fixedly connected with second hydraulic rod 10, and the top end of second hydraulic rod 10 is fixedly connected with second connecting column 11, and the outer wall of second connecting column 11 is rotatably connected with second movable pulley 12 on the two sides, and the right end of inner portal 2 is fixedly connected with second support plate 13 on the two sides, and the top end of second support plate 13 is fixedly connected with second chain 14, and second chain 14 is sleeved on the outer wall of second movable pulley 12, referring to Figure 4The other end of the second chain 14 is fixedly connected with a third supporting plate 15, and the right end of the third supporting plate 15 is fixedly connected to the left end of a supporting platform 16.

[0026] Specifically, a groove is formed on the outer side of the first and second movable pulleys 5 and 12, and the first and second chains 7 and 14 are sleeved in the groove. The stabilizing frame 9 ensures that the first connecting columns 4 on both sides are synchronously lifted and lowered. Through the first and second movable pulleys 5 and 12, the first and second chains 7 and 14 can be lowered by twice the distance of the first and second movable pulleys 5 and 12, thereby exceeding the stroke of the first and second hydraulic rods 3 and 10.

[0027] With reference to Figure 4 and Figure 5 , the inner wall of the supporting platform 16 is fixedly connected with a third hydraulic rod 19, the right end of the third hydraulic rod 19 is fixedly connected with an expansion plate 20, the outer wall of the expansion plate 20 is slidingly connected to the inner wall of the supporting platform 16, the top ends of the supporting platform 16 and the expansion plate 20 are fixedly connected with a first fence 18 and a second fence 21 respectively, the outer wall of the second fence 21 is slidingly connected to the inner wall of the first fence 18, and the left end of the supporting platform 16 is fixedly connected with sliding blocks 17 on the front and back sides.

[0028] Specifically, the top ends of the supporting platform 16 and the expansion plate 20 are fixedly connected with the first fence 18 and the second fence 21 respectively to provide protection, and when the expansion plate 20 slides in the supporting platform 16, the second fence 21 slides in the first fence 18. A controller is installed on the first fence 18, and the controller controls the first, second and third hydraulic rods 3, 10 and 19 through electrical signals.

[0029] Working principle: when using, the overall size of the support platform 16 is adjusted according to the need, the third hydraulic rod 19 is started, the third hydraulic rod 19 drives the expansion plate 20 to move to the right side, so that the expansion plate 20 moves out of the support platform 16, the overall area of the support platform 16 is changed, more objects can be carried, then the second hydraulic rod 10 is started, the second hydraulic rod 10 drives the second connecting column 11 to move downward, the second connecting column 11 drives the two sides of the second movable pulley 12 to move downward, so that the second chain 14 on the second movable pulley 12 is lowered, the second chain 14 no longer limits the support platform 16, the support platform 16 is lowered in the inner door frame 2 through the sliding block 17 under the gravity of the support platform 16, according to the movable pulley theorem, the end of the second chain 14 connected with the support platform 16 is twice the distance of the second movable pulley 12, so that the support platform 16 is lowered farther, exceeding the stroke of the second hydraulic rod 10, when the support platform 16 is lowered to the bottom end of the inner door frame 2, the first hydraulic rod 3 is started, the first hydraulic rod 3 drives the first movable pulley 5 to descend through the first connecting column 4, the first movable pulley 5 drives the first chain 7 to descend, so that the inner door frame 2 slides downward on the inner wall of the outer door frame 1, and according to the movable pulley theorem, the inner door frame 2 is lowered to the bottom end of the outer door frame 1, finally the support platform 16 is lowered to the bottom of the well, so as to maintain the bottom of the well.

[0030] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A mast for a fully hydraulic workover rig, characterized in that The utility model relates to a movable door frame, including outer door frame (1), the inner door frame (2) of sliding connection is connected in the inner wall of outer door frame (1), first hydraulic rod (3) is fixedly connected in the left end of outer door frame (1) both sides, the first connecting column (4) is fixedly connected in the top of first hydraulic rod (3), the first lifting assembly is provided with in the outer wall of first connecting column (4), the second hydraulic rod (10) is fixedly connected in the inner wall of inner door frame (2), the second connecting column (11) is fixedly connected in the top of second hydraulic rod (10), the support platform (16) is connected through the second lifting assembly with second connecting column (11), the expansion assembly is provided with in the inner wall of support platform (16).

2. The derrick for a full hydraulic workover rig of claim 1, wherein: The first lifting assembly includes a first movable pulley (5) rotatably connected to the outer wall of the first connecting column (4), a first support plate (8) fixedly connected to the left end of the inner door frame (2) on both sides, a first chain (7) fixedly connected to the top of the first support plate (8), and the first chain (7) sleeved on the outer wall of the first movable pulley (5).

3. The derrick for a full hydraulic workover rig of claim 2, wherein: The first chain (7) has a connecting frame (6) fixedly connected to the other end thereof, and the connecting frame (6) is fixedly connected to the outer wall of the outer door frame (1) on the inner side thereof.

4. The derrick for a full hydraulic workover rig of claim 1, wherein: The second lifting assembly includes a second movable pulley (12) rotatably connected to the outer wall of the second connecting column (11) on both sides, a second support plate (13) fixedly connected to the right end of the inner door frame (2) on both sides, a second chain (14) fixedly connected to the top of the second support plate (13), and the second chain (14) sleeved on the outer wall of the second movable pulley (12).

5. The derrick for a full hydraulic workover rig of claim 4, wherein: The second chain (14) has a third support plate (15) fixedly connected to the other end thereof, and the third support plate (15) is fixedly connected to the left end of the support platform (16) on the right end thereof.

6. The derrick for a full hydraulic workover rig of claim 1, wherein: The expansion assembly includes a third hydraulic rod (19) fixedly connected to the inner wall of the support platform (16), an expansion plate (20) fixedly connected to the right end of the third hydraulic rod (19), and the expansion plate (20) is slidably connected to the inner wall of the support platform (16) on the outer wall thereof.

7. The derrick for a full hydraulic workover rig of claim 6, wherein: The support platform (16) and the expansion plate (20) have a first fence (18) and a second fence (21) fixedly connected to the top ends thereof, respectively, and the second fence (21) is slidably connected to the inner wall of the first fence (18) on the outer wall thereof.

8. The derrick for a full hydraulic workover rig of claim 1, wherein: The support platform (16) has a sliding block (17) fixedly connected to the left end thereof on both sides, and the sliding block (17) is slidably connected to the inner wall of the inner door frame (2) on the outer wall thereof.

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