Prefabricated reinforced concrete wellhead for predrilling project

Abstract

The utility model discloses a prefabricated reinforced concrete wellhead of drilling front engineering has the foundation pit in the construction area and digs, and a plurality of concrete pedestals are located at the bottom of foundation pit, and the concrete pedestal is connected to each other and encloses the wellhead plane area, a plurality of prefabricated bottom plates are laid in the wellhead plane area, and the prefabricated bottom plate is connected to each other and constitutes the bottom plate structure between each other, and the bottom plate structure is full of the plane area, and the construction opening is equipped in the plane area of prefabricated bottom plate, and the prefabricated column is vertically arranged, and the bottom of prefabricated column is fixedly installed on the concrete pedestal, and the notch is equipped on the bottom plate structure, and a plurality of prefabricated side plates are arranged between the adjacent two prefabricated columns, and the side of the lowermost prefabricated side plate is attached to the side of bottom plate structure, and the bottom of upper prefabricated side plate is connected to the top of lower prefabricated side plate. Adopt the method of early prefabrication, on -the -spot assembly, reduce the on -the -spot construction time, improve wellhead construction efficiency greatly, reduce construction safety risk.

Description

Technical Field

[0001] This utility model relates to the field of oil or natural gas drilling technology, specifically to prefabricated reinforced concrete wellheads for pre-drilling engineering. Background Technology

[0002] Pre-drilling engineering refers to a series of preparatory works carried out before the commencement of oil or gas drilling operations to ensure the safe and efficient conduct of drilling operations. It is an important component of drilling engineering, primarily aimed at creating the necessary site, facilities, and technical conditions for subsequent drilling and well completion operations. A well is a key facility for the exploration and development of oil and gas, consisting of a cylindrical borehole of a certain depth formed by drilling into underground strata. The wellhead is the supporting structure for the well opening and also serves as the foundation support for the production tree.

[0003] The most commonly used wellhead is a cast-in-place reinforced concrete structure. First, the foundation pit is excavated, then formwork support is installed, steel bars are tied, and concrete is poured. After the concrete reaches a certain design strength, the outside of the foundation pit is backfilled, thus completing the wellhead construction.

[0004] The construction period for cast-in-place reinforced concrete is long, and the construction quality is difficult to guarantee; after the foundation pit is excavated, manual entry into the foundation pit is required for operation, which poses a high safety risk. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, a prefabricated reinforced concrete wellhead for pre-drilling engineering is provided, solving the problems of long construction cycles and significant safety hazards associated with traditional cast-in-place reinforced concrete construction for vertical shafts.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] The precast reinforced concrete wellhead for pre-drilling engineering involves excavating a foundation pit within the construction area. The precast reinforced concrete wellhead includes...

[0008] Concrete base, several concrete bases are set at the bottom of the pit, and the concrete bases are connected to each other to form the wellhead plane area;

[0009] A precast base plate is provided, in which several precast base plates are laid in the plane area of ​​the wellhead. The precast base plates are spliced ​​together to form a base plate structure, and the base plate structure covers the plane area. A drilling port is provided in the plane area formed by the precast base plates.

[0010] The precast columns are arranged vertically, and their bottoms are fixedly installed on a concrete base; the base plate structure has notches that match the precast columns.

[0011] Precast side panels are provided between two adjacent precast columns. The side of the lowermost precast side panel is attached to the side of the base plate structure, and the bottom of the uppermost precast side panel is connected to the top of the lowermost precast side panel.

[0012] According to the above technical solution, the foundation pit is a rectangular foundation pit, which includes four concrete bases distributed at the four corners of the foundation pit.

[0013] According to the above technical solution, the concrete base is a stepped or cup-shaped structure.

[0014] According to the above technical solution, a support surface is provided on the top of the concrete base, and an installation groove is provided in the middle of the support surface; the bottom end of the precast column is fixed in the installation groove, the bottom surface of the precast base plate is flush with the support surface, and a notch matching the cross-section of the precast column is provided in the area where the base plate structure matches the four precast foundations.

[0015] According to the above technical solution, a support pad is provided in the laying area of ​​the precast base plate. The support pad is laid as a whole or in sections. A construction area is reserved at the bottom of the construction opening of the support pad. The upper surface of the support pad is flush with the support surface of the precast foundation. The precast base plate is placed on the support pad or on the support pad and the support surface.

[0016] According to the above technical solution, a first grouting sealing layer is provided between the precast column and the precast foundation.

[0017] According to the above technical solution, vertical installation grooves are provided on the opposite sides of two adjacent precast columns, and the two ends of the precast side plates are inserted into the vertical installation grooves of the two adjacent precast columns; and a second grouting layer is provided between the precast columns and the precast side plates.

[0018] According to the above technical solution, a Z-shaped connection joint is provided between two adjacent precast side panels. The Z-shaped connection joint includes an inner horizontal connection joint, a vertical connection joint, and an outer horizontal connection joint connected in sequence. The inner horizontal connection joint is provided with a waterproof cement mortar filling layer, the vertical connection joint is provided with a rubber sealing ring, and the outer horizontal connection joint is provided with a polysulfide sealant layer.

[0019] According to the above technical solution, a third grouting layer is provided between two adjacent precast base plates, and the grouting layer connects all the precast base plates into a whole to form the base plate structure.

[0020] According to the above technical solution, a backfill soil layer is provided between the precast side slab and the side wall of the foundation pit.

[0021] This utility model has the following beneficial effects:

[0022] 1. Several precast base slabs are spliced ​​together to form a base slab structure, which is supported on several concrete bases; and multiple precast side slabs are connected on the concrete bases by precast columns. The precast side slabs between two adjacent precast columns form a side slab structure. Multiple side slab structures are surrounded on the base slab structure by precast columns and precast foundations, thus forming a complete precast reinforced concrete wellhead.

[0023] The aforementioned prefabricated reinforced concrete wellheads utilize a method of prefabrication in advance and assembly on-site, which reduces on-site construction time, greatly improves wellhead construction efficiency, and reduces construction safety risks.

[0024] 2. Z-shaped connection seams are provided between the precast side plates. Waterproof cement mortar is used to fill the inner horizontal connection seams, rubber sealing rings are used for the vertical connection seams, and polysulfide sealant is used for the outer horizontal connection seams. Additionally, a first grouting and sealing layer is provided between the precast column and the precast foundation, a second grouting layer is provided between the precast column and the precast side plate, and a third grouting layer is provided between two adjacent precast base plates. This ensures the sealing of the precast reinforced concrete wellhead and the reliability of the overall structural connection during the pre-drilling process.

[0025] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0027] Figure 1 This is a structural schematic diagram of an embodiment provided by this utility model;

[0028] Figure 2 This is a distribution diagram of the prefabricated foundations within the foundation pit provided in this embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the prefabricated foundation provided in an embodiment of this utility model;

[0030] Figure 4 This is a distribution diagram of the precast base plate on the precast foundation provided in the embodiment of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the precast base plate adjacent to the precast foundation provided in an embodiment of this utility model;

[0032] Figure 6 This is a distribution diagram of the precast columns on the precast foundation provided in the embodiment of this utility model;

[0033] Figure 7 This is a schematic diagram of the structure of the precast column provided in the embodiment of this utility model;

[0034] Figure 8 This is a schematic diagram of the connection between the precast side panel and the precast column according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the prefabricated side panel provided in an embodiment of this utility model;

[0036] Figure 10 This is a schematic diagram of the Z-shaped connecting seam provided in an embodiment of this utility model;

[0037] In the diagram, 1. Concrete base; 1-1. Support surface; 1-2. Installation groove; 2. Precast base plate; 2-1. Notch; 3. Construction opening; 4. Precast column; 4-1. Vertical installation groove; 5. Precast side plate; 6. Z-shaped connection joint; 6-1. Inner horizontal connection joint; 6-2. Vertical connection joint; 6-3. Outer horizontal connection joint. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-10 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0039] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] Reference Figures 1-10 As shown, this utility model provides an assembled precast reinforced concrete wellhead for pre-drilling engineering.

[0042] Example 1

[0043] A foundation pit was excavated within the construction area, and the prefabricated reinforced concrete wellhead includes...

[0044] Concrete base 1, several concrete bases are set at the bottom of the pit, and the concrete bases are connected to each other to form a wellhead plane area;

[0045] A precast base plate 2 is provided, in which several precast base plates are laid in the plane area of ​​the wellhead. The precast base plates are spliced ​​together to form a base plate structure, and the base plate structure covers the plane area. A drilling opening 3 is provided in the plane area formed by the precast base plates.

[0046] Precast column 4, the precast columns are arranged vertically, and the bottom of the precast columns are fixedly installed on the concrete base; the base plate structure is provided with a notch that matches the precast columns;

[0047] Precast side panel 5, with several precast side panels provided between two adjacent precast columns, the side of the lowermost precast side panel is attached to the side of the base plate structure, and the bottom of the uppermost precast side panel is connected to the top of the lowermost precast side panel.

[0048] In this application, several precast base plates are spliced ​​together to form a base plate structure, which is supported on several concrete bases; and multiple precast side plates are connected on the concrete bases by precast columns, with the precast side plates between two adjacent precast columns forming a side plate structure. The multiple side plate structures are surrounded on the base plate structure by precast columns and precast foundations, thereby forming a complete prefabricated reinforced concrete wellhead.

[0049] The aforementioned prefabricated reinforced concrete wellheads utilize a method of prefabrication in advance and assembly on-site, which reduces on-site construction time, greatly improves wellhead construction efficiency, and reduces construction safety risks.

[0050] The thickness and reinforcement of each of the above precast reinforced concrete components have been calculated by structural mechanics to meet the requirements for component strength and stability.

[0051] Example 2

[0052] Based on Example 1, a specific embodiment is given.

[0053] The foundation pit is rectangular and includes four concrete bases located at the four corners of the pit. Preferably, the concrete bases are stepped or cup-shaped structures, but other shapes are also acceptable.

[0054] The concrete base has a support surface 1-1 on top and an installation groove 1-2 in the middle of the support surface. The bottom end of the precast column is fixed in the installation groove. The bottom surface of the precast base plate is flush with the support surface. In the area where the base plate structure matches the four precast foundations, there is a notch 2-1 that matches the cross-section of the precast column.

[0055] To ensure that the bottom surface of the base plate structure is flush with the supporting surface of the precast foundation, a supporting pad layer is provided in the laying area of ​​the precast base plate. The supporting pad layer can be laid as a whole or in sections, and a construction area is reserved at the bottom of the construction opening of the supporting pad layer. The upper surface of the supporting pad layer is flush with the supporting surface of the precast foundation, and the precast base plate is placed on the supporting pad layer, or on the supporting pad layer and the supporting surface.

[0056] During the actual construction process, the bottom of the foundation pit is leveled. After the bottom of the foundation pit is leveled, four precast foundations are placed at the four corners of the rectangular foundation pit, and then a support cushion layer is laid inside the foundation pit. The support cushion layer can be laid as a whole, but no support cushion layer is set at the bottom of the construction opening. Alternatively, the support cushion layer can be set in sections and staggered in the non-construction opening areas corresponding to the wellhead plane area.

[0057] Next, precast base slabs are laid. As shown in the figure, three precast base slabs are set up. The middle precast base slab is supported by a support pad, and the precast base slabs on both sides are supported by a support surface and a support pad.

[0058] In Example 2, a first grouting sealing layer is provided between the precast column and the precast foundation.

[0059] In Example 2, vertical mounting grooves 4-1 are provided on the opposite sides of two adjacent precast columns, and the two ends of the precast side plates are inserted into the vertical mounting grooves of the two adjacent precast columns; and a second grouting layer is provided between the precast columns and the precast side plates.

[0060] In embodiment 1 or 2, a Z-shaped connecting joint 6 is provided between two adjacent precast side panels. The Z-shaped connecting joint includes an inner horizontal connecting joint 6-1, a vertical connecting joint 6-2, and an outer horizontal connecting joint 6-3 connected in sequence. The inner horizontal connecting joint is provided with a waterproof cement mortar filling layer, the vertical connecting joint is provided with a rubber sealing ring, and the outer horizontal connecting joint is provided with a polysulfide sealant layer.

[0061] In embodiment 1 or 2, a third grouting layer is provided between two adjacent precast base plates, and the grouting layer connects all the precast base plates into a whole to form the base plate structure.

[0062] In Example 1 or 2, a backfill soil layer is provided between the precast side panel and the foundation pit sidewall.

[0063] Construction process of this utility model:

[0064] 1. Positioning and layout: Level the site, excavate the foundation pit, and hoist four precast foundations at the four corners of the pit (the four control points of the square well opening). The precast foundations are stepped cup-shaped foundations. See the diagram:

[0065] 2. A support pad layer is set at the bottom of the foundation pit. Two parallel strip-shaped support pad layers are used, with the construction opening located between them. The support pad layer and the precast base slab are perpendicular in length. Afterwards, the precast base slab is hoisted and assembled on site. The precast base slab rests directly on the support pad layer and the support surface of the precast foundation. Cement-based high-strength non-shrink grout can be used to fill the gaps between adjacent precast base slabs, forming a third grouting layer, as shown in the diagram below.

[0066] 3. Insert precast columns into the installation grooves of the four precast foundations respectively. The gap between the precast columns and the installation grooves of the precast foundations can be sealed with polymer-modified cement-based grout to form the first grout sealing layer, as shown in the figure below.

[0067] 4. Insert precast side panels between two adjacent precast columns. Cement-based high-strength non-shrink grout can be used to fill the gap between the precast side panels and the precast columns, forming a second grouting layer. Z-shaped connection joints are provided between adjacent precast side panels. The Z-shaped connection joint includes an inner horizontal connection joint, a vertical connection joint, and an outer horizontal connection joint connected in sequence. The inner horizontal connection joint is filled with a waterproof cement mortar layer, the vertical connection joint is filled with a rubber sealing ring, and the outer horizontal connection joint is filled with a polysulfide sealant layer, as shown in the figure below.

[0068] 5. After all the precast side panels have been inserted, backfill the foundation pit outside the precast side panels to form a backfill soil layer; finally, complete the wellhead assembly.

[0069] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A prefabricated reinforced concrete wellhead for pre-drilling engineering, characterized in that: A foundation pit was excavated within the construction area, and the prefabricated reinforced concrete wellhead includes... Concrete base: Several concrete bases are set at the bottom of the pit, and the concrete bases are connected to each other to form a wellhead plane area; A precast base plate is provided, in which several precast base plates are laid in the plane area of ​​the wellhead. The precast base plates are spliced ​​together to form a base plate structure, and the base plate structure covers the plane area. A drilling port is provided in the plane area formed by the precast base plates. The precast columns are arranged vertically, and their bottoms are fixedly installed on a concrete base; the base plate structure has notches that match the precast columns. Precast side panels are provided between two adjacent precast columns. The side of the lowermost precast side panel is attached to the side of the base plate structure, and the bottom of the uppermost precast side panel is connected to the top of the lowermost precast side panel.

2. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 1, characterized in that: The foundation pit is a rectangular foundation pit, containing four concrete bases distributed at the four corners of the foundation pit.

3. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 2, characterized in that: The concrete base has a stepped or cup-shaped structure.

4. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 2, characterized in that: A support surface is provided on the top of the concrete base, and an installation groove is provided in the middle of the support surface; the bottom end of the precast column is fixed in the installation groove, the bottom surface of the precast base plate is flush with the support surface, and a notch matching the cross-section of the precast column is provided in the area where the base plate structure matches the four precast foundations.

5. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 4, characterized in that: A support pad is provided in the laying area of ​​the precast base plate. The support pad is laid as a whole or in sections. A construction area is reserved at the bottom of the construction opening of the support pad. The upper surface of the support pad is flush with the support surface of the precast foundation. The precast base plate is placed on the support pad, or on the support pad and the support surface.

6. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 5, characterized in that: A first grouting sealing layer is provided between the precast column and the precast foundation.

7. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 1, characterized in that: Vertical installation grooves are provided on the opposite sides of two adjacent precast columns, and the two ends of the precast side panels are inserted into the vertical installation grooves of the two adjacent precast columns; and a second grouting layer is provided between the precast columns and the precast side panels.

8. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 1, characterized in that: A Z-shaped connection joint is provided between two adjacent precast side panels. The Z-shaped connection joint includes an inner horizontal connection joint, a vertical connection joint, and an outer horizontal connection joint connected in sequence. The inner horizontal connection joint is filled with a waterproof cement mortar layer, the vertical connection joint is filled with a rubber sealing ring, and the outer horizontal connection joint is filled with a polysulfide sealant layer.

9. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 1, characterized in that: A third grouting layer is provided between two adjacent precast base plates, and the grouting layer connects all the precast base plates into a whole to form the base plate structure.

10. The prefabricated reinforced concrete wellhead for pre-drilling engineering according to claim 1, characterized in that: A backfill layer is provided between the precast side slab and the side wall of the foundation pit.

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