Transition piece for surface casing feeding based on non-drilling machine time well cementation and feeding method

A technology of surface casing and large and small heads, which is applied in drilling equipment and methods, drill pipes, casings, etc., can solve the problems of high driller experience requirements and difficult tripping of large and small heads, and achieves reduction of the difficulty of making and breaking. The effect of improving efficiency and reducing technical difficulty

Active Publication Date: 2020-09-25
四川盐业地质钻井大队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a casing head and feeding method based on non-drilling time cementing, so as to solve the problem in the prior art that the drilling experience is high and the casing is difficult to release after the casing is put in place. problems, to achieve the purpose of facilitating the connection and tripping between the size head and the bushing, reducing the difficulty of the operation and improving the efficiency of the operation

Method used

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  • Transition piece for surface casing feeding based on non-drilling machine time well cementation and feeding method
  • Transition piece for surface casing feeding based on non-drilling machine time well cementation and feeding method
  • Transition piece for surface casing feeding based on non-drilling machine time well cementation and feeding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1 to Figure 8 The upper and lower heads for surface casing feeding based on non-drilling time cementing shown include the upper and lower drill pipe connecting parts 1 and casing connecting parts 2, and the casing connecting parts 2 are arranged in sequence from top to bottom. Threaded section 1 4, convex ring 3, external threaded section 2 5, external threaded section 2 5 is matched with the casing box to be connected; it also includes a sleeve 6 sleeved outside the casing connecting portion 2, and the sleeve 6 The inner wall is provided with an internal thread segment 7 that matches the external thread segment 1, and the bottom of the sleeve 6 is provided with a number of annularly distributed supporting components; when the top surface of the connected casing collar contacts the bottom surface of the convex ring 3, the external thread segment Two 5 are threadedly connected with the connected casing box, and the supporting component supports the bottom...

Embodiment 2

[0053] On the basis of Embodiment 1, the supporting assembly includes a supporting block 8 slidably connected to the bottom of the sleeve 6 , and the supporting block 8 can slide along the radial direction of the sleeve 6 . A chute-9 is provided on the top surface of the supporting block 8, and a slide block-10 matched with the chute-9 is provided at the bottom of the sleeve 6; the axis of the chute-9 is perpendicular to the axis of the sleeve 6. It also includes a block 11 for preventing the radially outward sliding of the supporting block 8; the blocking block 11 corresponds to the supporting block 8 one by one. Slider 2 12 is set on the block 11 , and the outer wall of the sleeve 6 is provided with a chute 2 13 matched with the slider 2 12 , and the axis of the chute 2 13 is parallel to the axis of the sleeve 6 .

[0054] In this embodiment, the usage method of the supporting component includes:

[0055] When the bottom end of the casing collar 15 needs to be supported by ...

Embodiment 3

[0058] On the basis of Embodiment 2, the bottom surface of the supporting block 8 is gradually inclined downward along the radial direction outward; ; When the support block 8 slides to the outermost side, the inner end of the support block 8 is flush with the inner wall of the sleeve 6; flush.

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Abstract

The invention discloses a transition piece for surface casing feeding based on non-drilling machine time well cementation and a feeding method. The transition piece comprises a drill rod connecting part and a casing connecting part which are distributed up and down, wherein the casing connecting part is sequentially provided with an external thread section I, a convex ring and an external thread section II from top to bottom, and the external thread section II is matched with a connected casing female buckle; the transition piece further comprises a sleeve arranged outside the casing connecting part in a sleeving mode, the inner wall of the sleeve is provided with an internal thread section matched with the external thread section I, and the bottom of the sleeve is provided with a plurality of annularly distributed bearing assemblies; and when the top surface of a connected casing coupling makes contact with the bottom surface of the convex ring, the external thread section II is in threaded connection with the connected casing female buckle, and the bearing assemblies support the bottom surface of the connected casing coupling. The transition piece is used for solving the problemsthat in the prior art, the requirement for driller experience is high, and the transition piece is difficult to release after a casing is fed in place, and the purposes of facilitating connection andrelease between the transition piece and the casing, reducing the operation difficulty and improving the operation efficiency are achieved.

Description

technical field [0001] The invention relates to the field of drilling engineering, in particular to a large and small head and a feeding method for surface casing casing feeding based on off-rig time cementing. Background technique [0002] In the field of oil drilling, the drilling method of drilling several to dozens of directional wells in different directions on a well site, so that each well can drill to the target layer along its own designed well axis, is called slave well. . The biggest advantage of slave wells is that they can be drilled in batch drilling mode. In the sub-well batch drilling operation, for the surface first-opening operation, the operation mode is to send the casing from the drill floor to the wellhead after the surface casing is run in, and use simple cement heads and other equipment at the wellhead to complete the surface casing. Cementing construction, which is called off-rig time cementing. [0003] Drillpipe is more conventionally used to ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/08E21B7/20
CPCE21B7/20E21B17/08
Inventor 熊朝柱李凌宗
Owner 四川盐业地质钻井大队
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