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Near-bit logging data motor-passing wired transmission device

A technology of well logging data and cable transmission, which is applied in the field of oil drilling, can solve problems such as poor reliability, and achieve the effects of improved reliability, improved structural design, and less susceptible to interference

Active Publication Date: 2007-11-14
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the disadvantages that the motor wireless transmission is easily interfered by the bottom hole casing and complex working conditions, and the transmission reliability is poor

Method used

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  • Near-bit logging data motor-passing wired transmission device
  • Near-bit logging data motor-passing wired transmission device
  • Near-bit logging data motor-passing wired transmission device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: refer to accompanying drawing 1. The invention relates to a cable transmission device for near-drill logging data through a motor, which includes a measuring nipple 4 , a motor 6 and a bypass valve 7 . What motor 6 adopted is that diameter is the screw drilling tool of 172 millimeters. The upper end of the measuring nipple 4 is connected with a motor 6 through a thread 5 , and the upper end of the motor 6 is connected with a bypass valve 7 through a thread 5 . There are downhole measuring instruments in the measuring sub-section 4, and a MWD system 8 above the bypass valve 7. The data output interface of the downhole measuring instrument in the measurement sub-section 4 is connected with a data transmission wire 10, and the data transmission wire 10 passes through the casing of the measurement sub-section 4 and the thread 5 to connect the data transmission wire 10 in the housing of the motor 6; The data transmission wire 10 is connected to the data trans...

Embodiment 2

[0052] Measuring pup 4: Referring to Fig. 4 and Fig. 5, there is a radial hole 11 on the wall of the casing 12 of the measuring pup 4, and there is a data transmission wire 10 in the radial hole 11.

[0053] See Figure 6 and Figure 7. There is a groove on the outer surface of the housing 12, and there is a data transmission wire 10 in the groove, and a filler 13 is arranged in the groove to seal the groove, and the data transmission wire 10 is buried in the groove of the housing 12. The width of the groove is 5 mm, and the depth of the groove is 10 mm. The data transmission wires 10 in the radial holes 11 are connected with the data transmission wires 10 in the slots.

[0054] In addition, there is a radial hole 11 on the wall of the casing 12 at the other end of the measuring pup joint 4 , and there is a data transmission wire 10 inside the radial hole 11 . The purpose is to introduce the data transmission wire 10 in the groove into the housing 12 of the measuring sub 4 and...

Embodiment 3

[0060] Embodiment 3 is basically the same as Embodiment 1, except that the data transmission wire 10 is wound at the tooth root of the external thread 15 when passing through the thread. See Figure 13.

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PUM

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Abstract

The invention provides a near drill motor cable logging data transmission devices, used in the past geological drilling bits of data transmission system. Its characters are: the downhole instrument data output interface in measuring short section is connected with data transmission conducting wires, which is connected with the data transmission wires inside of shell through the shell of measuring short section; shell motor of the data transmission wires are connected with the bypass valve housing data transmission wires; bypass valve shell of the data transmission wires are connected with the receiver mouth of MWD data receiving system. The measuring short section and the motor and bypass valve thread are connected by thread. After the connection a short section measurement, and the bypass valve motor housing data transmission wires achieve docking and conduction. The effect is: nearly bit of this invention can be transmitted to the MWD data logging system, and then from MWD system uploads the data to ground receiving device upload system. This invention provides cable channel for bit data transmission and overcome the complexity of the radio transmission interference conditions and poor reliability deficiencies.

Description

technical field [0001] The invention relates to the technical field of oil drilling, in particular to a logging-while-drilling data transmission device, which is a motor-wired transmission device for near-drill logging data. Background technique [0002] With the continuous exploitation and consumption of oil and natural gas resources, the international oil price is rising steadily, prompting people to continuously expand the drilling target to new exploration areas and complex formations and thin oil and gas layers that were considered to have no development value in the early stage. The near-bit geosteering drilling system, based on its own characteristics and the functions of identification and steering while drilling, will undoubtedly effectively improve the success rate of exploration wells, improve the drilling rate and recovery rate of complex formations and thin oil layers, and save drilling costs , to increase reserves and increase production, with significant econo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12
Inventor 黄衍福邹连阳刘广华
Owner BC P INC CHINA NAT PETROLEUM CORP
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