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A construction operation string applied to oil and gas engineering

A technology for oil and gas and operating pipe strings, which is applied in the field of construction pipe strings for casing running operations and production stimulation and acidizing operations.

Inactive Publication Date: 2017-06-13
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the problems to be solved by the present invention is the technical problem encountered in the casing operation of the existing oil and gas drilling engineering, and a pipe string applied to the casing operation of the drilling engineering is provided.

Method used

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  • A construction operation string applied to oil and gas engineering
  • A construction operation string applied to oil and gas engineering
  • A construction operation string applied to oil and gas engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] As shown in Fig. 1(a), this embodiment discloses a construction operation pipe string applied to oil and gas engineering, specifically a pipe string applied to casing operation in drilling engineering, mainly composed of a casing reamer 1 , Eddy current rotating sub-joint 2, rotating dynamic sealing sub-joint 3, rotating shaft locking sub-joint 4 and casing joint 5.

[0043] During the running of the pipe string, the vortex rotating nipple 2 rotates under the action of the circulating fluid, which drives the casing reamer 1 to rotate, and repairs the irregular well wall. After the casing remarker 1 reaches the bottom of the well, inject cement Slurry, replacement fluid. After the casing operation is completed at this stage, the drill bit can be used to press down the drillable weir 407, and the locking ring 402 will lock the rotating shaft 301; Small well.

[0044] Such as figure 2 As shown, the vortex rotating short joint 2 is composed of a turbine 201 and a casing ...

Embodiment 2

[0059] As shown in Figure 1(b), this embodiment discloses a construction operation pipe string applied to oil and gas engineering, specifically a pipe string used in oil layer transformation and acidification operation, mainly composed of acid liquid injector 6, vortex rotation The short joint 2, the rotating dynamic sealing joint 3 and the oil pipe joint 7 are composed.

[0060] The specific structure of the vortex rotating sub-joint 2 is the same as that of the embodiment 1, and will not be repeated here. The only difference is that the material of the turbine 201 is acid-resistant cast steel. The specific structure of the rotating dynamic sealing sub-joint 3 is the same as that of the first embodiment, and will not be repeated here.

[0061] The upper end of the casing 202 of the vortex rotating joint 2 is connected with the lower end of the rotating shaft 301 of the rotating dynamic sealing joint 3 with a pipe thread, and the lower end of the casing 202 is connected with t...

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Abstract

The invention belongs to the field of oil and natural gas engineering, and discloses a construction operation pipe column applied to oil and natural gas engineering. When applied to casing running operation in drilling engineering, the pipe column is formed by sequentially connecting a casing reaming device, a vortex rotary pup joint, a rotary dynamic seal pup joint, a rotary shaft locking pup joint and a casing joint in series. When applied to oil formation improvement stimulation acidification operation, the pipe column is formed by sequentially connecting an acid liquor injector, a vortex rotary pup joint, a rotary dynamic seal pup joint and an oil pipe joint in series. In the casing running operation, the vortex rotary pup joint is driven by working liquor to drive the casing reaming device to rotate, a well wall is continuously trimmed, a casing is prevented from meeting resistance and can smoothly trip in, and the casing bottom well cementation quality can be improved; in the stimulation acidification operation, the vortex rotary pup joint drives the acid liquor injector to rotate, acid liquor is rotationally injected so as to be evenly distributed, and the acidification efficiency is improved.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas engineering, and in particular relates to a construction pipe string for casing running operation and production increasing acidizing operation. Background technique [0002] In the casing running operation of oil and gas drilling engineering, if obstruction is encountered, conventional treatment methods are relatively simple, and only hydraulic jet flushing and upper and lower movable strings can be used to remove obstruction. It cannot solve the problem of the casing being blocked, and the pipe string can only be lifted up to re-drill the well, resulting in an increase in drilling time and drilling cost. In addition, the cement slurry at the bottom of the casing is not sufficiently stirred during the existing casing operation, which affects the cementing quality at the bottom of the casing. [0003] In oil and gas production stimulation acidizing operations, since the conventional acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/20E21B7/18E21B43/22E21B33/13E21B17/10F03B3/12F03B13/02F16C3/02
CPCY02E10/20
Inventor 张兰江同武军陈洪亮黄亮黄灵刚谢新华张国超梁玉斌夏竹君张明杰朱新华李志达刘益宁刘华臣
Owner CNOOC ENERGY TECH & SERVICES