Hydraulically-driven reaming-while-drilling tool

A technology of reaming while drilling and hydraulic drive, which is applied to drill bits, earthwork drilling, drilling equipment, etc. It can solve the problems affecting the reaming efficiency of tools and the energy loss of drilling fluid, etc., and achieves easy manufacturing, installation and maintenance, and small flow loss , the effect of small area

Active Publication Date: 2021-01-08
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using throttling to open the reamer can avoid stopping the pump and drilling, and reduce the overall cost of drilling. However, the main circuit of the drilling fluid circulation in the existing reaming tools uses nozzle throttling, which causes the energy loss of the drilling fluid and affects the reaming when the tool is opened. eye efficiency

Method used

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  • Hydraulically-driven reaming-while-drilling tool

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention will be further described: as Figure 1-Figure 5 As shown, the hydraulically driven reaming tool mainly consists of three parts, including the main body 4 of the starting device, the main body 11 of the driving device and the main body 17 of the actuator. Among them, the starting device main body 4 and the driving device main body 11 are connected by four M8 upper connecting bolts 27, and the driving device main body 4 and the actuator main body 17 are connected by four M8 lower connecting bolts to form a unified whole by the upper gland 2 and the lower gland. 25 is packaged in the reaming tool housing 3. The end of the upper gland 2 is provided with an end sealing ring 5, and the bottom of the lower gland 25 is provided with a bottom sealing ring 24 to ensure that bad hollow cuttings cannot enter the drilling fluid circulation channel. Both ends of the reaming tool housing 3 are connected with the u...

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Abstract

The invention discloses a hydraulically-driven reaming-while-drilling tool. The hydraulically-driven reaming-while-drilling tool mainly solves the problem that an existing reaming-while-drilling toolis small in reaming range. The hydraulically-driven reaming-while-drilling tool is characterized by comprising three parts including a starting device main body, a driving device main body and an executing device main body; a throttling reversing valve is arranged in the starting device main body and comprises a throttling reversing valve cavity, a throttling reversing valve element, a throttlingspring and a throttling reversing valve gland; and a throttle reversing valve switch is controlled to be started by the displacement of a drilling pump, and after the throttle reversing valve is opened, a piston of a hydraulic cylinder in the driving device main body descends under the action of liquid pressure to drive a cutter wing of a four-rod mechanism in the executing device main body to extend out to start reaming work. According to the hydraulically-driven reaming-while-drilling tool, under the condition that drilling is not affected, the reaming range can be enlarged, and the reamingrate can reach 60%.

Description

technical field [0001] The invention relates to a reaming tool while drilling in petroleum drilling engineering. Background technique [0002] Reaming while drilling is a drilling technique that uses reaming while drilling tools and conventional drill bits to expand the wellbore while drilling. In the early 1970s, downhole reaming technology was introduced into China from abroad. After nearly 40 years of development, Dagang, Liaohe, Shengli Oilfield and other units have successively developed eye reamers of different specifications on the basis of tracking and investigating foreign technologies. representative. The BG type eye reamer designed by Shengli Oilfield is composed of hydraulic propulsion mechanism, control mechanism, reamer body and righting system. When the drilling fluid flows through the upper nozzle, due to the throttling effect of the pressure regulating rod, a large pressure drop occurs on the center rod, which pushes the center rod down and pushes out the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/28E21B10/32E21B34/08
CPCE21B7/28E21B10/322E21B34/08
Inventor 哈明达王长进李银朋焦艳红朱天玉徐鑫
Owner NORTHEAST GASOLINEEUM UNIV
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