A tight reservoir radial drilling tool kit

A technology for tight reservoirs and tools, applied in directional drilling, earthwork drilling, drilling equipment, etc., can solve problems such as difficulties in radial drilling operations in tight reservoirs, and achieve the effect of avoiding excessive drilling speed

Active Publication Date: 2019-03-15
BC P INC CHINA NAT PETROLEUM CORP +3
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Problems solved by technology

[0004] In order to solve the problem of difficult radial drilling operations in tight reservoirs, the present invention provides a radial drilling tool set for tight reservoirs, which can complete radial jet drilling in three trips , first use the low-speed feeding mechanism to complete the radial jet drilling of penetrating the cement sheath at a distance of 2 meters; on this basis, through the step-by-step feeding method, complete the radial drilling of the formation near the wellbore zone at a distance of 10 meters at a uniform and low speed Jet drilling; finally, through the front end of the nozzle connected to the self-drawing nozzle and the rear end to apply thrust, the radial jet drilling of the far-end formation with a distance of 30 meters is completed

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  • A tight reservoir radial drilling tool kit
  • A tight reservoir radial drilling tool kit
  • A tight reservoir radial drilling tool kit

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Embodiment Construction

[0033] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0034] A radial drilling tool kit for tight reservoirs, including a tool 3 for drilling a cement sheath, a tool 4 for drilling near-well zone formations and a tool 5 for drilling far-end formations.

[0035] The following describes a drilling method for a tight reservoir radial drilling tool kit, including the following steps:

[0036] Step 1, lower the positioning and guiding tool 1 into the design depth to be operated in the wellbore;

[0037] Step 2. Lower the casing drilling tool 2 into the positioning and guiding tool 1 to perform casing drilling and window opening;

[0038] Step 3, put the drilling cement sheath tool 3 into the positioning guide tool 1, and carry out the drilling cement...

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Abstract

The invention provides a tool suite for tight reservoir radial drilling. The tool suite comprise a cement sheath drilling tool (3), a near-wellbore area stratum drilling tool (4) and a far-end stratum drilling tool (5). The tool suite for tight reservoir radial drilling is mainly used for radial jet flow drilling operation of tight reservoir reconstruction of a petroleum and nature gas industry and a coalbed methane industry. Jet flow drilling of a cement sheath, jet flow drilling of a near-wellbore area stratum and jet flow drilling of a far-end stratum can be completed in three steps through the tool suite for tight reservoir radial drilling, a radial circulation channel can be effectively built between a reservoir and a wellbore, the circulation of the oil reservoir is improved, and the recovery efficiency of a single well is improved.

Description

technical field [0001] The invention relates to the field of drilling equipment in the oil and gas industry or the coalbed methane industry, in particular to a radial drilling tool kit for tight reservoirs. Background technique [0002] At present, in the domestic oil and gas energy industry, with years of accumulated large-scale exploitation, there are fewer and fewer proven recoverable oil and gas resources left, the oil recovery process has become more and more complex, and the difficulty of extraction has become increasingly high. In order to enhance oil recovery, a variety of new secondary oil recovery techniques and methods are being researched and promoted by industry practitioners. Many oil and gas resources being explored belong to tight reservoirs. For oil and gas wells in tight reservoirs, due to the small formation porosity and low permeability, it is difficult for the oil and gas resources in the reservoirs to be recovered through water injection or gas injectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/04E21B7/18
CPCE21B7/046E21B7/18
Inventor 胡强法陈智张友军于东兵张炎盖志亮
Owner BC P INC CHINA NAT PETROLEUM CORP
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