Well drilling double casing pipe for parallel lowering

Abstract

The utility model provides a well drilling double casing pipe for parallel lowering, which comprises a first casing pipe, a mounting rack is arranged on the side wall of the first casing pipe, and a slot is arranged on the side wall of the mounting rack far away from the first casing pipe; and the side wall of the second sleeve is provided with an installation block, and the installation block is connected with the insertion groove in an inserted mode so that the second sleeve and the first sleeve can be detachably connected. The first casing pipe and the second casing pipe are installed together, the two casing pipes below large-diameter well drilling is carried out, the construction efficiency can be improved, and the drilling utilization rate can be increased. The first casing pipe and the second casing pipe are inserted in the side wall inserting grooves, and stable installation of the first casing pipe and the second casing pipe can be guaranteed. And the first sleeve and the second sleeve are detachably connected, so that the first sleeve and the second sleeve can be reused, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling, especially to a drilling double casing pipe for parallel down-put. BACKGROUND

[0002] In recent years, with the continuous deterioration of deep mining safety and working environment, and the attention of the state to green mine construction and mine safety production, the large-diameter multifunctional well that integrates the purposes of gas extraction, ice transportation and cooling, strong drainage, ventilation, feeding, cable laying and mine rescue and escape for the purpose of safety, energy reduction and high efficiency is more and more favored by various mining enterprises. Two casing pipes are simultaneously down-put in the large-diameter drilling, which can improve the construction efficiency and improve the utilization rate of drilling, so it is a problem to be solved to develop and invent a large-diameter drilling double casing pipe parallel down-put method.

[0003] The traditional construction scheme: at present, the casing pipe for well cementing of large-diameter well usually belongs to concentric layer-by-layer down-put, and the research on double casing pipe parallel down-put is very little, but in the construction process, the casing pipe is easy to collide, break and other accidents due to the large outer diameter and large quality of the casing pipe and the large probability of double casing pipe parallel down-put. Therefore, it is a problem to be solved to develop and invent a large-diameter drilling double casing pipe parallel down-put method. SUMMARY

[0004] Therefore, the utility model aims at providing a drilling double casing pipe for parallel down-put to solve part or all of the technical problems in the background art.

[0005] In order to achieve the above purpose, the utility model provides a drilling double casing pipe for parallel down-put, which comprises:

[0006] A first casing pipe is provided with a mounting frame on the side wall, and the mounting frame is provided with a slot away from the side wall of the first casing pipe;

[0007] A second casing pipe is provided with a mounting block on the side wall, and the mounting block is inserted into the slot to detachably connect the second casing pipe and the first casing pipe.

[0008] Optionally, the slot comprises a plurality of slots, and the plurality of slots are arranged at equal distances along the length direction of the mounting frame, the number of the mounting blocks is equal to the number of the slots, and the mounting blocks are one-to-one inserted into the slots.

[0009] Optionally, the mounting frame is provided with a through slot at the top, the through slot penetrates all the slots, and a fixing plate is inserted into the through slot, so that the mounting block is fixed in the slot after being inserted into the slot.

[0010] Optionally, the first sleeve is provided with a first sealing disc, and the first sealing disc is provided with a one-way valve, and the one-way valve is located in the first sleeve.

[0011] Optionally, the first sleeve is provided with a first sleeve bottom under the first sealing disc, and the first sleeve bottom is provided with a grouting hole in the side wall.

[0012] Optionally, the first sleeve bottom is in the shape of a trapezoid in cross section.

[0013] Optionally, the grouting holes are arranged in a spiral shape along the side wall of the first sleeve bottom.

[0014] Optionally, the second sleeve is provided with a second sealing disc at the bottom, and the second sleeve is provided with a second sleeve bottom under the second sealing disc.

[0015] Optionally, the second sleeve bottom is provided with an inclined surface.

[0016] Optionally, the top of the first sleeve is higher than the top of the second sleeve.

[0017] As can be seen from the above, the drilling double sleeve for parallel placement provided by the utility model comprises a first sleeve, a mounting rack is arranged on the side wall of the first sleeve, and a slot is arranged on the side wall of the first sleeve away from the mounting rack; a second sleeve, a mounting block is arranged on the side wall of the second sleeve, and the mounting block is inserted into the slot, so that the second sleeve and the first sleeve are detachably connected. By mounting the first sleeve and the second sleeve together, two sleeves are arranged below the large-diameter drilling, the construction efficiency is improved, and the drilling utilization rate is improved. The first sleeve and the second sleeve are inserted into the slot in the side wall, so that the first sleeve and the second sleeve can be stably mounted. By arranging the first sleeve and the second sleeve to be detachably connected, the first sleeve and the second sleeve can be reused, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the utility model or the related technical scheme, the following will briefly introduce the drawings needed to be used in the embodiment or the related technical description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0019] Figure 1 It is a structure schematic view of the drilling double sleeve for parallel placement of the embodiment of the utility model;

[0020] Figure 2 It is a split structure schematic view of the first sleeve and the second sleeve of the drilling double sleeve for parallel placement of the embodiment of the utility model;

[0021] Figure 3 A first casing structure schematic view of the utility model embodiment;

[0022] Figure 4 A well drilling double casing profile structure schematic view for parallel and parallel placement of the utility model embodiment.

[0023] Reference signs:

[0024] 1, first casing; 2, second casing; 11, mounting bracket; 111, slot; 12, elevator; 13, first sealing disc; 10, first bottom casing bottom; 101, grouting hole; 21, mounting block; 22, second sealing disc; 23, second bottom casing; 112, through slot; 3, fixed plate; 14, one-way valve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the following will be combined with specific embodiments, and the utility model will be further explained in detail with reference to the drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model embodiments should be understood as the usual meaning understood by persons skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model embodiments do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] As described in the background section,

[0028] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0029] As Figures 1-4 Indicated, the utility model provides a kind of well drilling double casing for parallel and parallel placement, comprising:

[0030] First casing 1, the side wall is equipped with mounting bracket 11, the mounting bracket 11 is equipped with slot 111 away from the side wall of first casing 1;

[0031] The second sleeve 2 is provided with a mounting block 21 on the side wall, and the mounting block 21 is inserted into the slot 111, so that the second sleeve 2 and the first sleeve 1 are detachably connected.

[0032] Specifically, by mounting the first sleeve 1 and the second sleeve 2 together, the two sleeves below the large-diameter well are drilled, which can improve the construction efficiency and improve the utilization rate of the drilling. The first sleeve 1 and the second sleeve 2 are inserted into the side wall slot 111, which can ensure the stable installation of the first sleeve 1 and the second sleeve 2. By setting the first sleeve 1 and the second sleeve 2 to be detachably connected, the first sleeve 1 and the second sleeve 2 can be reused, thereby saving costs.

[0033] In some embodiments, as shown in Figures 1-3 The slot 111 includes a plurality of slots 111 arranged at equal intervals along the length direction of the mounting frame 11, and the number of the mounting blocks 21 is equal to the number of the slots 111, and the mounting blocks 21 are inserted into the slots 111 one by one.

[0034] Specifically, a plurality of slots 111 are arranged along the length direction of the mounting frame 11, that is, the second sleeve 2 is provided with mounting blocks 21 corresponding to the slots 111 along the length direction, so that the second sleeve 2 is more stable when mounted with the first sleeve 1.

[0035] In some embodiments, as shown in Figures 1-3 The mounting frame 11 is provided with a through slot 112, the through slot 112 penetrates all the slots 111, and the fixing plate 3 is inserted into the through slot 112. After the mounting block 21 is inserted into the slot 111, the fixing plate 3 fixes the mounting block 21 in the slot 111.

[0036] Specifically, the mounting frame 11 is provided with slots 111, and the through slot 112 penetrates all the slots 111. After the mounting block 21 is inserted into the slot 111, the side wall of the mounting block 21 abuts against the fixing plate 3, so that the fixing plate 3 fixes the mounting block in the slot 111, and the second sleeve 2 is stably mounted on the first sleeve 1.

[0037] In some embodiments, as shown in Figure 4 The first sleeve 1 is provided with a first sealing disc 13, and the one-way valve 14 is arranged on the first sealing disc 13 and located in the first sleeve 1.

[0038] Specifically, the one-way valve 14 is arranged on the first sleeve 1, which can prevent the mud or other impurities in the drilling hole from entering the first sleeve 1 and causing the first sleeve 1 to be blocked when the sleeve is lowered.

[0039] In some embodiments, as shown inFigures 1-3 As shown in the drawings, the first casing 1 is provided with a first casing 1 bottom below the first sealing disc 13, and the side wall of the first casing 1 bottom is provided with a grouting hole 101.

[0040] Specifically, the length of the first casing 1 bottom can be 1.5-2 meters. By providing the first casing 1 bottom, the grouting effect can be improved, and by providing the grouting hole 101 on the first casing 1 bottom, the grouting in the borehole can be better.

[0041] In some embodiments, as shown in the drawings, the first casing 1 bottom is provided with a first sealing disc 13. Figures 1-3 As shown in the drawings, the cross section of the first casing 1 bottom is trapezoidal.

[0042] Specifically, the cross section of the first casing 1 bottom is trapezoidal, which facilitates the lowering of the casing into the borehole that needs to be drilled.

[0043] In some embodiments, as shown in the drawings, the first casing 1 bottom is provided with a first sealing disc 13. Figures 1-3 As shown in the drawings, the grouting hole 101 is arranged in a spiral shape along the side wall of the first casing 1 bottom.

[0044] Specifically, the grouting hole 101 is arranged in a spiral shape, so that during grouting, the grouting can be better.

[0045] In some embodiments, as shown in the drawings, the second casing 2 bottom is provided with a second sealing disc 22. Figures 1-3 As shown in the drawings, the second casing 2 bottom is provided with a second sealing disc 22.

[0046] In some embodiments, as shown in the drawings, the second casing 2 bottom is provided with an inclined surface. Figures 1-3 As shown in the drawings, the second casing 2 bottom is provided with an inclined surface.

[0047] Specifically, the second casing 2 bottom is provided with an inclined surface, which facilitates the lowering of the second casing 2.

[0048] In some embodiments, as shown in the drawings, the top of the first casing 1 is higher than the top of the second casing 2. Figures 1-3 As shown in the drawings, the top of the first casing 1 is higher than the top of the second casing 2.

[0049] Specifically, the top of the first casing 1 and the top of the second casing 2 are about 5 meters apart. Preferably, the distance is 5 meters.

[0050] In some embodiments, as shown in the drawings, the first casing 1 is provided with a lifting clamp 12. Figure 1 As shown in the drawings, the first casing 1 is provided with a lifting clamp 12.

[0051] The lifting clamp 12 is provided on the first casing 1, which facilitates the lifting of the first casing 1 for drilling operation.

[0052] Based on the above embodiments, the size of the first casing 1 can be Φ377x12mm, and the size of the second casing 2 can be Φ168x12mm

[0053] The specific use process of the utility model is as follows:

[0054] When drilling and casing, the first casing 1 and the second casing 2 can be installed first, the mounting block 21 on the second casing 2 is inserted into the slot 111 of the mounting frame 11 on the side wall of the first casing 1, then when the mounting block 21 is inserted into the bottom of the slot 111, the fixing plate 3 is inserted into the through slot 112 communicated with the slot 111, the fixing plate 3 is provided with bolt holes on the top, the mounting frame 11 is provided with corresponding bolt holes, the fixing plate 3 is fixed on the mounting frame 11 through bolts, the installation of the first casing 1 and the second casing 2 is completed, and after the installation is completed, the casing is hoisted by a crane or other tool vehicles to carry out the casing operation.

[0055] After the two sets of casings are installed together and welded, the welds should be verified by flaw detection. During the flaw detection, if the welding quality is unqualified or does not meet the requirements, the unqualified welding position is cut and polished immediately by using an angle grinder and is welded again, and then the flaw detection step is repeated, and the three-layer welding process is ensured during the welding process to ensure the welding quality.

[0056] The inclination is confirmed by using an infrared level, once the inclination is found, the lowering is stopped, the inclination is corrected by using a guide steel rope, and then the pipe can be lowered.

[0057] It should be noted that the above describes some embodiments of the utility model. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than the order described above and still achieve desirable results. In addition, the processes depicted in the figures do not necessarily require the particular order shown or sequential order to achieve desirable results. In some implementations, multitasking and parallel processing can be advantageous or possible.

[0058] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to limit the scope of the utility model (including claims) to these examples; under the idea of the utility model, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model embodiments as described above, which are not provided in detail for the sake of brevity.

[0059] Although the utility model has been described in conjunction with specific embodiments of the utility model, many alternatives, modifications and variations to these embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures can use the embodiments discussed.

[0060] Embodiments of the present application are intended to encompass all such alternatives, modifications and variations falling within the broad scope of the appended claims. Accordingly, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the scope of protection of the present application.

Claims

1. A drilling double casing for side-by-side running, characterized in that, The utility model relates to a detachable connection structure of first sleeve and second sleeve, including: First sleeve (1), be equipped with mounting frame (11) on the side wall, the mounting frame (11) is equipped with slot (111) away from the side wall of first sleeve (1); Second sleeve (2), the side wall of second sleeve (2) is equipped with mounting block (21), the mounting block (21) is inserted with slot (111), so that second sleeve (2) and first sleeve (1) can be detachably connected.

2. A dual casing for side-by-side drilling as defined in claim 1, wherein, The slot (111) includes multiple, multiple slot (111) equidistant array along the length direction of mounting frame (11) is arranged, the number of mounting block (21) is equal to the number of slot (111), and the mounting block (21) is inserted with slot (111) one by one.

3. A dual casing for side-by-side drilling as defined in claim 1, wherein, The top of mounting frame (11) is equipped with through slot (112), the through slot (112) is arranged through all slot (111), and the through slot (112) is inserted with fixed plate (3), after mounting block (21) is inserted into slot (111), fixed plate (3) will mounting block (21) be fixed in slot (111).

4. A dual casing for side-by-side drilling as defined in claim 3, wherein, First sleeve (1) is equipped with first sealing disc (13), and first sealing disc (13) is equipped with one-way valve (14), and one-way valve (14) is located in first sleeve (1).

5. A dual casing for side-by-side drilling as defined in claim 4, wherein, The bottom of first sleeve (1) is equipped with first sleeve (1) bottom under first sealing disc (13), and the side wall of first sleeve (1) bottom is equipped with grouting hole (101).

6. A dual casing for side-by-side drilling as defined in claim 3, wherein, The bottom of first sleeve (1) is trapezoidal.

7. A dual casing for side-by-side drilling as defined in claim 5, wherein, The grouting hole (101) is helically arranged along the side wall of the bottom of the first sleeve (1).

8. A dual casing for side-by-side drilling as defined in claim 7, wherein, Second sleeve (2) bottom is equipped with second sealing disc (22), and second sleeve (2) bottom is located below second sealing disc (22).

9. A dual casing for side-by-side drilling as defined in claim 1, wherein, Second sleeve (2) bottom is equipped with inclined plane.

10. A dual casing for side-by-side drilling as defined in claim 1, wherein, The top of first sleeve (1) is higher than the top of second sleeve (2).

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