Drilling engineering cement paste consolidation wear-resistant pipe construction auxiliary tool

Abstract

The utility model relates to an auxiliary tool for cement paste consolidation wear-resistant pipe construction in drilling engineering, and belongs to the technical field of engineering construction. Comprising a guider and a pipe hoop, the head of the guider is conical and can be inserted into a guide hole reserved in the well bottom, the tail of the guider is connected with the pipe hoop, the pipe hoop is connected with a buoyancy valve, and a slurry return hole is formed in the guider. The pipe hoop and the buoyancy valve are matched for operation, and an inner screw buckle on the pipe hoop and an outer screw opening in the bottom of the buoyancy valve are installed. The utility model has the benefits that the buoyancy valve is protected to work normally, and the lifting weight upper limit of the steel wire rope is increased; sediment at the bottom of the hole is prevented from blocking a piston hole of the buoyancy valve, and cement paste is smoothly ejected to the outside of the pipe by pressure and filled in a gap between the pipe and a hole wall; the unique design shape, size and appearance ensure the verticality requirement of wear-resistant pipe installation. The well cementation safety is ensured, the construction quality, the construction period and the economic benefits are also ensured, and well cementation accidents are prevented.

Description

Technical Field

[0001] The utility model relates to an auxiliary tool for construction of cement slurry consolidation wear-resistant pipes in drilling engineering, belonging to the technical field of engineering construction. Background Art

[0002] Cement slurry cementing is one of the core processes for cementing casing in drilling projects, and it requires great attention to ensure the continuity of construction. The outstanding characteristics of cement slurry cementing wear-resistant pipe operations are that there are a lot of sediment in the hole, the weight of the wire rope is large, the operation risk factor is high, and the verticality requirement for the installation of wear-resistant pipes is high. During the cement slurry cementing process, it is necessary to ensure that the piston hole of the buoyancy valve is unobstructed to prevent blockage, and the cement slurry is squeezed from the bottom of the pipe to the gap between the outside of the pipe and the hole wall through pressure.

[0003] At present, bimetallic wear-resistant pipes are rarely used in domestic well engineering, and are generally ordinary seamless steel pipes. The construction plan is to cut holes at the top of the first pipe or the bottom of the second pipe so that the cement slurry can be squeezed directly through the hole in the pipe wall to the outside. Because the hole is far away from the bottom of the hole, the sediment at the bottom of the hole will not affect the cementing operation. The installation of wear-resistant pipes usually increases a certain depth of footage and installs a floating shoe at the bottom of the pipe. After the installation of the wear-resistant pipe, a certain safety distance is left from the bottom of the hole, which is not affected by the sediment at the bottom of the hole, so as to ensure the smooth completion of the cementing operation. This method has certain defects. In the process of installing the wear-resistant pipe, in order to ensure buoyancy and reduce the suspension weight, the inside of the pipe is air. Before cementing, mud needs to be injected to balance the pressure inside and outside the pipe to avoid the increase of the pressure outside the pipe during cementing and damage to the pipe. While injecting mud into the pipe, the weight of the suspended suspension at the bottom of the pipe is also increasing, which is easy to cause the weld or wellhead support load to be too large, thus causing accidents. The above two construction methods have certain limitations, such as the requirements for verticality and the requirements for the lifting weight of the pipe. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the utility model provides a drilling engineering cement slurry consolidation wear-resistant pipe construction auxiliary tool, which can not only avoid the risk of cement slurry blockage caused by excessive sediment at the bottom of the hole during the cementing process, but also increase the upper limit of the weight of the wear-resistant pipe installation, ensure the verticality requirement of the wear-resistant pipe installation, and ensure the continuity, rapidity, efficiency and safety of the cementing operation. At the same time, it can reduce the hidden dangers when dismantling the cementing tool underground, so that the auxiliary buoyancy valve can complete the cementing operation more smoothly and avoid the occurrence of cementing accidents.

[0005] The utility model is realized through the following technical scheme: a drilling engineering cement slurry consolidation wear-resistant pipe construction auxiliary tool, comprising a guide and a pipe clamp, the guide head is conical and can be inserted into a guide hole reserved at the bottom of the well, the tail of the guide is connected to the pipe clamp, the pipe clamp is connected to the buoyancy valve, and the guide is provided with a slurry return hole.

[0006] The pipe clamp and the buoyancy valve cooperate with each other, and the inner thread buckle on the pipe clamp is installed with the outer thread mouth at the bottom of the buoyancy valve.

[0007] The buoyancy valve is connected to the wear-resistant pipe, and after the drill pipe is connected to the cementing joint, it is lowered to the bottom of the hole through the wear-resistant pipe, and the cementing joint is plugged into the piston hole of the buoyancy valve.

[0008] The pipe clamp has the same size as the wear-resistant pipe clamp.

[0009] The beneficial effects of the utility model are: protecting the normal operation of the buoyancy valve, increasing the upper limit of the wire rope lifting weight; avoiding the bottom sediment blocking the piston hole of the buoyancy valve, ensuring that the cement slurry is smoothly pushed to the outside of the pipe by pressure to fill the gap between the pipe and the hole wall; the unique design shape, size, and appearance ensure the verticality requirements of the wear-resistant pipe installation. It not only ensures the safety of cementing, but also ensures the construction quality, construction period, and economic benefits, and prevents the occurrence of cementing accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below based on the drawings and embodiments.

[0011] Figure 1 It is a reference diagram of the use status of the utility model.

[0012] In the figure: 1. guide; 2. pipe clamp; 3. buoyancy valve; 4. slurry return hole; 5. guide hole reserved at the bottom of the well; 6. wear-resistant pipe; 7. drill pipe; 8. wellhead. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0015] like Figure 1 The illustrated auxiliary tool for construction of cement slurry-consolidated wear-resistant pipes for drilling engineering comprises a guide 1 and a pipe clamp 2. The head of the guide 1 is conical and can be inserted into a guide hole 5 reserved at the bottom of the well. The tail of the guide 1 is connected to the pipe clamp 2, and the pipe clamp 2 is connected to a buoyancy valve 3. A slurry return hole 4 is provided on the guide 1.

[0016] The pipe clamp 2 and the buoyancy valve 3 cooperate with each other, and the inner thread buckle on the pipe clamp 2 is installed with the outer thread mouth at the bottom of the buoyancy valve 3.

[0017] The buoyancy valve 3 is connected to the wear-resistant pipe 6. After the drill pipe 7 is connected to the cementing joint, it is lowered to the bottom of the hole through the wear-resistant pipe 6. The cementing joint and the piston hole of the buoyancy valve 3 are plugged into each other.

[0018] The pipe clamp 2 and the wear-resistant pipe 6 have the same size.

[0019] The cementing tool is 2500mm long, the pipe clamp 2 is 500mm long, and the specification is Φ406*12. The cone length of the guide 1 is 500mm, and the top diameter is 200mm<the guide hole diameter 244.5mm, which can be aligned and fall into the reserved guide hole at the bottom of the well; the diameter of the return hole 4 is about 40mm, the cutting hole spacing is 200mm, and the number of expanded holes is 25. The pipe clamp 2 is the same size as the wear-resistant pipe 6. The purpose of installing the cementing tool is to ensure that the piston hole is in an open state under the action of pressure and is not blocked.

[0020] Before installing the wear-resistant pipe 6, the construction personnel of this patent first connect the cementing tool with the buoyancy valve 3, then lift it to the wellhead 8 through the lifting card, and then weld and install the wear-resistant pipe 6 one by one. After all the wear-resistant pipes 6 are lowered into the hole, the first drill pipe 7 is connected to the cementing joint and lowered to the bottom of the hole one by one until the cementing joint and the piston hole are inserted into place. The cement slurry blocks remaining in the pipe, the buoyancy valve, and the cement slurry blocks in the cementing tool are broken, and most of them are cleaned to the ground outside the hole through mud circulation. After the hole is swept, the hole is cleaned, that is, the mud in the pipe is pumped out with a long-lift water pump or a homemade barrel tool is used to lift the mud out of the hole. Before constructing the wear-resistant bottom support frame underground, the cementing tool and the buoyancy valve 3 are removed.

[0021] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction auxiliary tool for cement slurry consolidation wear-resistant pipe in drilling engineering, characterized by: The invention comprises a guide (1) and a pipe clamp (2); the head of the guide (1) is conical and can be inserted into a guide hole (5) reserved at the bottom of the well; the tail of the guide (1) is connected to the pipe clamp (2); the pipe clamp (2) is connected to a buoyancy valve (3); and a slurry return hole (4) is provided on the guide (1).

2. The construction auxiliary tool for cement slurry consolidation wear-resistant pipe in drilling engineering according to claim 1, characterized in that: The pipe clamp (2) and the buoyancy valve (3) cooperate with each other to operate, and the inner thread buckle on the pipe clamp (2) is installed with the outer thread mouth at the bottom of the buoyancy valve (3).

3. The construction auxiliary tool for cement slurry consolidation wear-resistant pipe in drilling engineering according to claim 1, characterized in that: The buoyancy valve (3) is connected to the wear-resistant pipe (6), and after the drill pipe (7) is connected to the cementing joint, it is lowered to the bottom of the hole through the wear-resistant pipe (6), and the cementing joint is plugged into the piston hole of the buoyancy valve (3).

4. The construction auxiliary tool for cement slurry consolidation wear-resistant pipe in drilling engineering according to claim 1, characterized in that: The pipe hoop (2) has the same size as the pipe hoop of the wear-resistant pipe (6).

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