Leaking stoppage device for drilling fluid circulation channel

Abstract

The utility model relates to the technical field of leaking stoppage of drilling fluid circulation channels, in particular to a leaking stoppage device for a drilling fluid circulation channel, which comprises a while-drilling body and a piston bush, the piston bush is movably mounted in the while-drilling body, a spring is mounted in the while-drilling body in a clamping manner, and the piston bush is movably mounted in the while-drilling body. The top end of the spring is fixedly connected with the bottom end of the piston sleeve, first holes are formed in the inner wall of the while-drilling body, the number of the first holes is two, second holes are formed in the inner wall of the piston sleeve, the number of the second holes is two, and the two first holes are matched with the two second holes. Under the condition that pulling out while drilling is not needed, through movable arrangement of the piston sleeve, the plugging solvent can flow out of the while-drilling body from the second hole of the piston sleeve and the first hole of the while-drilling body, and then the operation of plugging a gap in a drilling fluid circulation channel is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plugging leakage in a drilling fluid circulation channel, in particular to a plugging device for a drilling fluid circulation channel. Background Art

[0002] During the drilling process, leakage and other phenomena that affect the construction progress are prone to occur. Once leakage occurs, plugging materials are needed for plugging operations. However, plugging materials are easy to block downhole measurement while drilling instruments and other tools. Therefore, it is necessary to pull out the downhole measurement while drilling instruments and other tools, and then drill again to plug the leakage. Therefore, a plugging device for a drilling fluid circulation channel is proposed, which can plug the leakage without pulling out the downhole while drilling. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a plugging device for a drilling fluid circulation channel, which can perform plugging work without the need for drilling fluid removal.

[0004] The technical solution adopted by the utility model to solve its technical problems is a plugging device for a drilling fluid circulation channel, comprising a drilling body and a piston sleeve, the piston sleeve is movably installed inside the drilling body, a spring is clamped and installed inside the drilling body, the top of the spring is fixedly connected to the bottom of the piston sleeve, the inner wall of the drilling body is provided with a first hole, the first hole is relatively arranged at two locations, the inner wall of the piston sleeve is provided with a second hole, the second hole is relatively arranged at two locations, and the two first holes are adapted to the two second holes.

[0005] By adopting the above technical solution, without the need to pull out the drilling fluid, the plugging solvent can flow out of the drilling fluid body from the second hole of the piston sleeve and the first hole of the drilling fluid body through the movable setting of the piston sleeve, thereby realizing the operation of sealing the gap in the drilling fluid circulation channel.

[0006] By blocking the blocking port with a blocking block, it is possible to prevent the plugging solvent from flowing into measuring instruments and other tools at the bottom of the drilling body.

[0007] Specifically, a support rod is fixedly connected to the upper part of the inner wall of the drilling body, two support rods are arranged opposite to each other, and a sealing protection box is fixedly connected between ends of the two support rods that are close to each other.

[0008] By adopting the above technical solution, the support rod can play a role of fixing and supporting the sealing protection box, and the sealing protection box can protect the electric cylinder.

[0009] Specifically, an electric cylinder is fixedly installed inside the sealing protection box, and the output end of the electric cylinder passes through the bottom end of the sealing protection box and is fixedly connected to the top end of the piston push rod, and the bottom end of the piston push rod is fixedly connected to the top end of the drainage cover.

[0010] By adopting the above technical solution, the electric cylinder can allow the blocking block to be inserted into the blocking port to block the blocking port.

[0011] Specifically, the drainage cover is arranged in a conical structure, and the bottom end of the drainage cover is fixedly connected to the top end of the blocking block.

[0012] By adopting the above technical solution, the drainage hood can allow the plugging solvent to flow out of the drilling body along the inclined direction of the drainage hood.

[0013] Specifically, a sealing opening is fixedly connected to the inner wall of the piston sleeve, and the sealing opening is used for inserting a sealing block.

[0014] By adopting the above technical solution, after the plugging port is blocked by the plugging block, the plugging solvent will not flow to the measuring instruments and other tools at the bottom of the drilling body.

[0015] Beneficial effects of the utility model:

[0016] (1) The plugging device for a drilling fluid circulation channel described in the utility model can allow the plugging solvent to flow out of the drilling body from the second hole of the piston sleeve and the first hole of the drilling body through the movable setting of the piston sleeve without the need to remove the drilling body, thereby realizing the operation of plugging the gap in the drilling fluid circulation channel.

[0017] (2) The plugging device for a drilling fluid circulation channel described in the utility model can prevent the plugging solvent from flowing into measuring instruments and other tools at the bottom of the drilling body by plugging the plugging port with a plugging block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the planar structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the piston sleeve activity structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the blocking block of the utility model;

[0022] In the figure: 1. spring; 2. drilling body; 3. first hole; 4. sealing port; 5. piston push rod; 6. electric cylinder; 7. sealing protection box; 8. support rod; 9. drainage cover; 10. second hole; 11. sealing block; 12. piston sleeve. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] In order to be able to carry out plugging work without the need to pull out while drilling, as an embodiment of the utility model, Figure 1-Figure 3 As shown, a plugging device for a drilling fluid circulation channel described in the utility model comprises a drilling body 2 and a piston sleeve 12, wherein the piston sleeve 12 is movably installed inside the drilling body 2, and a spring 1 is clamped and installed inside the drilling body 2, and the top of the spring 1 is fixedly connected to the bottom of the piston sleeve 12, and a first hole 3 is provided on the inner wall of the drilling body 2, and the first hole 3 is relatively provided at two locations, and a second hole 10 is provided on the inner wall of the piston sleeve 12, and the second hole 10 is relatively provided at two locations, and the two first holes 3 are adapted to the two second holes 10.

[0025] When in use, the spring 1 can be compressed by moving the piston sleeve 12 downward, and the first hole 3 opened on the inner wall of the drilling body 2 and the second hole 10 opened on the inner wall of the piston sleeve 12 are aligned, so that the plugging solvent is injected into the piston sleeve 12 from the inside of the drilling body 2. After the plugging solvent falls into the piston sleeve 12, it flows out of the inside of the drilling body 2 from the second hole 10 and the first hole 3 through the drainage cover 9, and plugs the gap in the drilling fluid circulation channel.

[0026] For example, Figure 1-3 As shown, the new use also includes that a support rod 8 is fixedly connected to the upper part of the inner wall of the drilling body 2, two support rods 8 are arranged opposite to each other, and a sealing protection box 7 is fixedly connected between the ends of the two support rods 8 that are close to each other.

[0027] When in use, the support rod 8 is used to support and fix the sealing protection box 7 .

[0028] For example, Figure 1-3 As shown, the new use also includes that an electric cylinder 6 is fixedly installed inside the sealing protection box 7, and the output end of the electric cylinder 6 passes through the bottom end of the sealing protection box 7 and is fixedly connected to the top end of the piston push rod 5, and the bottom end of the piston push rod 5 is fixedly connected to the top end of the drainage cover 9.

[0029] When in use, the electric cylinder 6 is started to drive the piston push rod 5 to push downward, so that the piston push rod 5 can drive the drainage cover 9 and the blocking block 11 to push downward until the blocking block 11 can block the blocking port 4, and the blocking port 4 will jam the blocking block 11, thereby driving the piston sleeve 12 to push downward;

[0030] After the plugging is completed, the electric cylinder 6 is started again to drive the piston push rod 5 to move upward, the blocking block 11 is pulled out of the plugging port 4 and continues to move upward for a distance, and the piston sleeve 12 will also generate kinetic energy to push upward as the spring 1 is compressed, so that the first hole 10 and the second hole 3 are offset, and finally the original height is restored to facilitate the next plugging.

[0031] For example, Figure 1-3 As shown, the new use also includes that the drainage cover 9 is arranged in a conical structure, and the bottom end of the drainage cover 9 is fixedly connected to the top end of the blocking block 11.

[0032] During use, when the blocking block 11 is inserted into the blocking port 4 , the position of the drainage cover 9 can just allow the plugging solvent flowing into the piston sleeve 12 to flow toward the second hole 10 and the first hole 3 along the inclined direction of the drainage cover 9 .

[0033] For example, Figure 1-3 As shown, the present invention also includes that the inner wall of the piston sleeve 12 is fixedly connected with a blocking port 4, and the blocking port 4 is used for inserting the blocking block 11.

[0034] When in use, the blocking block 11 can block the blocking port 4 , and the blocking port 4 will jam the blocking block 11 , thereby driving the piston sleeve 12 to be pushed downward.

[0035] When the utility model is in use, when it is necessary to plug the leak, firstly, the electric cylinder 6 is started to drive the piston push rod 5 to push downward, so that the piston push rod 5 can drive the drainage cover 9 and the blocking block 11 to push downward, until the blocking block 11 can block the blocking port 4, and the blocking port 4 will jam the blocking block 11, and then the piston sleeve 12 can be driven to push downward. As the piston sleeve 12 is pushed downward, the spring 1 is compressed, and the second hole 10 can be aligned with the first hole 3, and then the plugging solvent is put into the piston from the inside of the drilling body 2. After the plugging is completed, the electric cylinder 6 is started again to drive the piston push rod 5 to move upward, and the plugging block 11 is pulled out of the plugging port 4 and continues to move upward for a distance. The piston sleeve 12 will also generate kinetic energy to push upward as the spring 1 is compressed, so that the first hole 10 and the second hole 3 are offset, and finally the original height is restored to facilitate the next plugging.

[0036] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A plugging device for a drilling fluid circulation channel, comprising a drilling body (2) and a piston sleeve (12), characterized in that: A piston sleeve (12) is movably installed inside the drilling body (2), a spring (1) is clamped and installed inside the drilling body (2), the top end of the spring (1) is fixedly connected to the bottom end of the piston sleeve (12), the inner wall of the drilling body (2) is provided with a first hole (3), the first hole (3) is arranged at two locations opposite to each other, the inner wall of the piston sleeve (12) is provided with a second hole (10), the second hole (10) is arranged at two locations opposite to each other, the two first holes (3) are matched with the two second holes (10); a support rod (8) is fixedly connected to the upper part of the inner wall of the drilling body (2), two support rods (8) are arranged opposite to each other, and a sealing protection box (7) is fixedly connected between the ends of the two support rods (8) close to each other; An electric cylinder (6) is fixedly installed inside the sealing protection box (7), and the output end of the electric cylinder (6) passes through the bottom end of the sealing protection box (7) and is fixedly connected to the top end of the piston push rod (5), and the bottom end of the piston push rod (5) is fixedly connected to the top end of the drainage cover (9); the drainage cover (9) is arranged in a conical structure, and the bottom end of the drainage cover (9) is fixedly connected to the top end of the blocking block (11); the inner wall of the piston sleeve (12) is fixedly connected with a blocking port (4), and the blocking port (4) is used for inserting the blocking block (11).

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