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Bit pup joint capable of producing hydraulic pulsation in downhole

A technology of drill bits and pup joints, which is applied in drilling tools, drilling equipment, earthwork drilling, etc., can solve the problems of limiting rock-breaking drilling efficiency, weakening hydraulic pulsation auxiliary rock-breaking ability, and large loss of hydraulic energy along the way, to achieve The Effect of Improving the Drilling Efficiency of Drill Bits in Breaking Rock

Inactive Publication Date: 2007-07-04
SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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  • Description
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  • Application Information

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Problems solved by technology

The current technology has problems such as the lack of adjustability of hydraulic pulsation frequency and peak value, and the pulsation generator is too far away from the bottom of the well, which causes a large loss of hydraulic energy along the way, weakens the ability of hydraulic pulsation to assist rock breaking, and limits the efficiency of rock breaking drilling. improve

Method used

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  • Bit pup joint capable of producing hydraulic pulsation in downhole
  • Bit pup joint capable of producing hydraulic pulsation in downhole

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Embodiment Construction

[0008] Now in conjunction with further description of the present invention.

[0009] When adopting the present invention to break formation rocks, the rotor is installed on the lower end of the connecting shaft by screw connection. The stator is sleeved on the connecting shaft and installed on the upper part of the rotor. There is a gap between the inner diameter of the stator and the outer diameter of the connecting shaft. The stator and the connecting sleeve are connected by threads. A thrust bearing is installed between the stator and the shoulder of the connecting shaft. A compression nut is arranged on the upper end of the connecting shaft, a centralizing bearing is arranged between the compression nut and the shaft shoulder of the connecting shaft, and a threaded connection is adopted between the compression nut and the connecting sleeve. The connection sleeve is fixed inside the pup joint housing. The hydraulic pulsation drill bit nipple is connected with the drill b...

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Abstract

The present invention relates to a drill bit nipper joint capable of producing hydraulic pulsation in downhole, belonging to matched device of drill bit. The rotor with flow channel is mounted in the lower end of coupling shaft, the stator with flow channel is cover-mounted on the coupling shaft, and mounted in the upper portion of rotor, the stator adopts scrwe-thread to connect with adaptor sleeve, a holddown nut is mounted in the upper end of coupling shaft, and adopts screw-thread to connect with coupling sleeve, and the adaptor sleeve is fixedly mounted in the interior of nipper joint shell body to connect the hydraulic pulsation drill bit nipper joint with drill bit, the rotor is extended into the interior of drill bit, and the lower end face of the rotor is positioned in inlet of drill bit port. The drilling fluid can be passed through stator or regulate its impact direction to drive rotor and make it rotate, the flow channel of rotor lower end and port of drill bit are sometimes coincided and sometimes staggered so as to produce hydraulic pulsation in the downhole and raise drilling efficiency.

Description

Technical field: [0001] The invention belongs to a supporting device of a drill bit for oil and natural gas drilling. Background technique: [0002] When the drill bit breaks rocks in deep formations, there is generally the problem of low rock breaking efficiency, which restricts the improvement of the drilling speed of drilling machines and makes the production cost high. Practice shows that the hydraulic pulsation at the bottom of the well helps to improve the rock breaking effect and increase the ROP. The current technology has problems such as the lack of adjustability of hydraulic pulsation frequency and peak value, and the pulsation generator is too far away from the bottom of the well, which causes a large loss of hydraulic energy along the way, weakens the ability of hydraulic pulsation to assist rock breaking, and limits the rock breaking drilling efficiency. improve. Therefore, increasing the peak pressure of hydraulic pulsation as much as possible while adjustin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B12/00
Inventor 倪红坚马清明王瑞和韩来聚许俊良
Owner SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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