Construction technology capable of repeatedly utilizing well cementation casing pipe

Abstract

The invention relates to the field of area treatment well drilling, in particular to a construction technology capable of repeatedly utilizing a well cementation casing pipe. The construction technology of the repeatedly utilizing the well cementation casing pipe comprises the following steps that step 1, a first-section casing pipe is put down; step 2, a second-section casing pipe is put down; step 3, the second-section casing pipe is pulled out; step 4, the first-section casing pipe is pulled out; and step 5, after the casing pipe is pulled out, the whole hole section is sealed through cement paste. The method has the advantages that the problem that the casing pipe cannot be reused is solved, the situation that the whole-hole-section casing pipe cannot be retrieved when the lower layer position of the casing pipe is not correct can be avoided, resource waste is avoided, and the project operation cost is reduced.

Description

technical field

[0001] The invention relates to the field of regional control drilling, in particular to a construction technique for reusable cementing casing. Background technique

[0002] In the existing traditional regional governance, the main hole construction adopts the full cementing construction method of lowering the multi-stage casing and returning the cement slurry to the ground. After the construction is completed, the casing will no longer play other functions, which will easily cause waste of resources and increase project operating costs; in addition In the event of an incorrect layer under the casing, the casing of the entire hole section cannot be recovered, resulting in large economic losses. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a construction process of reusable cementing casing, which effectively overcomes the defects of the prior art.

[0004] The technical scheme that the presen...

Examples

Embodiment

[0035] Embodiment: The construction technology of the reusable cementing casing of this embodiment is characterized in that it includes the following steps:

[0036] Step 1. Drilling to 20m above the bedrock, and running a casing. The casing below the bedrock and the casing above the bedrock adopt opposite threaded joints, as follows:

[0037] S1. First use the through-hole tool to test (go down into the well). If the test process is smooth, go directly to the bottom of the hole. If there is an obstacle, lift it up 1-2m, turn on the pump to circulate, and sweep the hole in the forward direction. After passing through smoothly, then Lift it up, then sweep through the hole, repeat the above steps several times to ensure that the lower tube is unobstructed;

[0038] S2. Weld the water stop to the upper part of the swirl nipple, install the positive and negative joints, and spot weld the positive and negative joints with the anti-buckle seam of the water stop;

[0039] S3. Run th...

technical field

[0001] The invention relates to the field of regional control drilling, in particular to a construction technique for reusable cementing casing. Background technique

[0002] In the existing traditional regional governance, the main hole construction adopts the full cementing construction method of lowering the multi-stage casing and returning the cement slurry to the ground. After the construction is completed, the casing will no longer play other functions, which will easily cause waste of resources and increase project operating costs; in addition In the event of an incorrect layer under the casing, the casing of the entire hole section cannot be recovered, resulting in large economic losses. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a construction process of reusable cementing casing, which effectively overcomes the defects of the prior art.

[0004] The technical scheme that the presen...

Examples

Embodiment

[0035] Embodiment: The construction technology of the reusable cementing casing of this embodiment is characterized in that it includes the following steps:

[0036] Step 1. Drilling to 20m above the bedrock, and running a casing. The casing below the bedrock and the casing above the bedrock adopt opposite threaded joints, as follows:

[0037] S1. First use the through-hole tool to test (go down into the well). If the test process is smooth, go directly to the bottom of the hole. If there is an obstacle, lift it up 1-2m, turn on the pump to circulate, and sweep the hole in the forward direction. After passing through smoothly, then Lift it up, then sweep through the hole, repeat the above steps several times to ensure that the lower tube is unobstructed;

[0038] S2. Weld the water stop to the upper part of the swirl nipple, install the positive and negative joints, and spot weld the positive and negative joints with the anti-buckle seam of the water stop;

[0039] S3. Run th...