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Ultra-carbon connecting tube jet drilling horizontal well system and jet drilling method

A horizontal well and jet drilling technology, which is applied to drilling equipment and methods, liquid/gas jet drilling, drilling equipment, etc., can solve the problems of complex downhole problems, high pollution, and a lot of waste, and achieve the reduction of environmental protection level , reduce the viscosity of crude oil and save the total investment

Inactive Publication Date: 2017-01-25
牛辉英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to aim at the above-mentioned problems existing in the current horizontal well drilling technology, and provide a super-carbon continuous pipe jet drilling horizontal well system and a jet drilling method to solve the current problems of using clean water, water base, oil base, foam, etc. Drilling fluid, in the process of jet drilling, there are complex downhole problems, a lot of waste, and high pollution problems, which can improve drilling speed, oil and gas production and environmental protection level, and reduce well site equipment and drilling costs

Method used

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  • Ultra-carbon connecting tube jet drilling horizontal well system and jet drilling method
  • Ultra-carbon connecting tube jet drilling horizontal well system and jet drilling method
  • Ultra-carbon connecting tube jet drilling horizontal well system and jet drilling method

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Embodiment 1

[0048] like figure 1 as shown, figure 1 It is a flow chart of the ultra-carbon continuous jet drilling horizontal well system provided in Example 1 of the present invention.

[0049] This embodiment discloses a super carbon continuous jet drilling horizontal well system, including a super carbon closed separation circulation unit and a super carbon continuous jet drilling unit, wherein,

[0050] The super-carbon airtight separation circulation unit is set on the ground to recover the downhole return produced by the super-carbon jet drilling unit during the jet drilling process, from which it is separated and processed to obtain supercritical carbon dioxide and then exported to the super-carbon jet drilling unit The unit specifically includes a back pressure control device, a super-carbon extraction separator, a super-carbon gasification separator, a carbon dioxide tank, a compressor, a super-carbon tank and a super-carbon pump connected in sequence through pipelines.

[0051...

Embodiment 2

[0081] like Figure 5 as shown, Figure 5 Plan view of a single fishbone horizontal well for ultra-carbon continuous jet drilling provided in Example 2 of the present invention.

[0082] In this embodiment 2, for a single fishbone horizontal well with ultra-carbon continuous jet drilling, the ultra-carbon continuous jet drilling horizontal well system described in embodiment 1 is adopted, and the ultra-carbon circulation separation steps are the same as step S1 in embodiment 1. The difference lies in S2: using supercritical carbon dioxide jet to drill a single fishbone horizontal well, which specifically includes the following steps:

[0083] S301. For new drilling, put casing and cement on the top of the oil layer in advance, drill the casing accessories and oil and gas layer pilot holes and log the well, or open the casing at the top of the oil and gas layer of the old well, or forge and mill it into an open hole.

[0084] S302. Seal the pilot hole section of the new well ...

Embodiment 3

[0092] like Image 6 as shown, Image 6 The plan view of the double fishbone horizontal well provided by the ultra-carbon jet-drilling jet drilled in Example 3 of the present invention.

[0093] In this embodiment 3, the super carbon jet drilling horizontal well system described in embodiment 1 is adopted for super carbon jet drilling double fishbone horizontal wells, and the super carbon circulation separation steps are the same as step S1 in embodiment 1 , the difference lies in S2: using supercritical carbon dioxide jetting to drill double fishbone horizontal wells, specifically including the following steps:

[0094] S401. For new drilling, put casing and cement on the top of the oil layer in advance, drill the casing accessories and the pilot hole of the oil and gas layer and log the well, or open the casing at the top of the oil and gas layer of the old well, or forge and mill it into an open hole.

[0095] S402. Seal the pilot hole section of the new well or the forgi...

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Abstract

The invention discloses an ultra-carbon connecting tube jet drilling horizontal well system and a jet drilling method. The ultra-carbon connecting tube jet drilling horizontal well system comprises an ultra-carbon closed separation circulation unit and an ultra-carbon connecting tube jet drilling unit. Waste generated in the jet drilling process is jetted, guided and recovered by the aid of supercritical carbon dioxide, so that supercritical carbon dioxide is separated, serves as drilling fluid and is circulated into the ultra-carbon connecting tube jet drilling unit again, and jet drilling is performed. The system solves the problems of small borehole diameter, complicated horizontal section and borehole problems, more waste and large pollution of a current coiled tubing jet drilling radial horizontal well taking clear water, water base, oil base, foam and the like as the drilling fluid, the diameter of a well hole and the length of the horizontal well section can be greatly increased, drilling speed, oil-gas yield and environmental protection level are improved, and well site facilities and drilling and production costs are reduced.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a super-carbon continuous pipe jet drilling horizontal well system and a jet drilling method. Background technique [0002] Horizontal wells are special wells in which the maximum inclination angle is kept at about 90 degrees and a certain length of horizontal well section is maintained in the target layer. The outstanding feature of horizontal wells is that the length of the wellbore passing through the oil and gas layer is long, which increases the contact surface area between the well and the oil and gas layer, so that the oil and gas well has the advantages of high single well production and fast production speed. However, the existing coiled tubing radial horizontal well drilling technology mainly has the following problems: [0003] 1. Fluid limitation and downhole complex problems: The existing jet drilling technology for radial horizontal wells commonly uses...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B7/18E21B21/07E21B21/16
CPCE21B7/046E21B7/18E21B21/063E21B21/07E21B21/16E21B21/085
Inventor 牛辉英
Owner 牛辉英
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