CN204283413U - Nearly drill bit directional tool - Google Patents

Abstract

Nearly drill bit directional tool, it is characterized in that by terrestrial information treatment facility, MWD inclinometer, nearly drill bit measures pipe nipple, nearly drill bit receives pipe nipple and MWD reception pipe nipple forms, MWD receives pipe nipple and is arranged in MWD inclinometer system, and its magnetic signal conversion equipment receives within the scope of pipe nipple magnetic strength transmitting coil between nearly drill bit; MWD inclinometer is in nearly drill bit directional tool upper end; Nearly drill bit is measured pipe nipple and is arranged between drill bit and screw rod by screw thread; Nearly drill bit is received pipe nipple and is arranged between screw rod and non magnetic drill collar by screw thread.Nearly drill bit measures pipe nipple and nearly drill bit receives the wireless telecommunications of pipe nipple leap screw rod small gap, send data to nearly drill bit by mud and receive pipe nipple, nearly drill bit receives the wireless communication mode that pipe nipple adopts penetrating metal wall, nearly the drill bit supplemental characteristic measured measured by pipe nipple sends MWD to the supplemental characteristic self surveyed and receives pipe nipple, and eventually through MWD inclinometer, real-time drilling desired parameters data is sent to terrestrial information treatment facility.

Description

Near-Bit Inclinometer While Drilling

technical field

The utility model can be applied to the field of drilling engineering in petroleum, coal mine and geological exploration, and is an inclinometer while drilling near a drill bit.

Background technique

At present, in the technical field of inclinometer while drilling in oil wells, the main measuring instruments used are still wireless inclinometer while drilling, wired inclinometer while drilling, single multi-point inclinometer and so on. This restricts the measuring instrument to be located at the upper end of the screw, so that it is still a certain distance away from the drill bit. The detection range is limited to the upper end of the screw, and the detection accuracy decreases, resulting in deviations in the measured attitude parameters, formation information and mechanical parameters from the actual information of the drill bit. Especially for thin oil layers, conventional tools while drilling cannot meet the measurement needs. Therefore, the inclinometer near the drill bit, which can collect, transmit and receive, and can perform real-time measurement near the "drill bit", will gradually occupy the market in today's oil drilling industry.

Contents of the invention

In order to overcome the disadvantage that the existing MWD inclinometer cannot measure parameters near the "drill bit", the utility model provides a MWD inclinometer near the drill bit to realize wireless communication across the screw rod. The measured attitude parameters, formation information and mechanical parameters provide reliability assurance for oil drilling.

The technical solution adopted by the utility model to solve the technical problems is: near-drill inclinometer while drilling, which is characterized by ground information processing equipment, MWD inclinometer, near-drill measuring sub, near-drill receiving sub and MWD receiving The MWD receiving sub is installed in the MWD inclinometer system, and its magnetic signal conversion device is located within the range of the magnetic induction transmitting coil of the receiving sub near the drill bit; the MWD inclinometer is at the upper end of the inclinometer while drilling near the drill bit; The near-bit measuring sub is installed between the drill bit and the screw through threads; the near-bit receiving sub is installed between the screw and the non-magnetic drill collar through threads.

The near-bit measuring sub and the near-drill receiving sub communicate wirelessly across the small gap of the screw, and transmit the data to the near-drill receiving sub through the mud. The near-drill receiving sub adopts a wireless communication method that penetrates the metal wall, and the near-drill measuring sub The measured parameter data and its own measured parameter data are sent to the MWD receiving sub, and finally the real-time drilling parameter data is sent to the ground information processing equipment through the MWD inclinometer.

The data acquisition circuit installed on the main body of the near-drill measuring pup includes an acceleration processing module, a temperature processing module, an angular velocity processing module, a Geiger counter processing module, and a voltage processing module. . When connecting downhole, it is installed between the drill bit and the screw rod through threads.

The receiving short joint near the drill bit, the data receiving circuit installed on the main body includes a drilling pressure sensor processing module, a torque sensor processing module, and an outer ring air pressure sensor processing module, and a magnetic induction jacket is installed on the outside, and a receiving coil, a magnetic induction transmit coil. When connecting downhole, it is installed between the screw rod and the non-magnetic drill collar through threads.

The beneficial effects of the utility model are: the data measurement point provided by the utility model is near the drill bit, so the geological information and attitude parameters are more reliable; the inclinometer near the drill bit can measure in real time during the rotation process; the azimuth during the rotation process can be realized Gamma measurement function; near-bit measuring sub-section and near-drill receiving sub-section are separated from the screw rod, and different screw drilling tools can be selected.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

The accompanying drawing is a schematic diagram of the downhole connection and structure of the instrument of the utility model.

In the figure 1. Receiving sub-joint near the drill bit, 2. Receiving battery pack, 3. Torque sensor, 4. Magnetic jacket, 5. Receiving sub-joint drill collar, 6. MWD receiving sub-joint, 7. Receiving coil, 8. Magnetic Inductive transmitting coil, 9. drill pressure sensor, 10. data receiving circuit, 11. outer ring air pressure sensor, 12. pressure jacket, 13. transmitting coil, 14. gamma sensor, 15. data acquisition circuit, 16. acquisition Battery pack, 17. Measuring pup collar, 18. Measuring pup near the drill bit.

Detailed ways

See attached drawing 1. The inclinometer while drilling near the bit is composed of surface information processing equipment, MWD inclinometer, measuring sub-section 18 near the bit, receiving sub-section 1 near the bit and receiving sub-section 6 of MWD. The receiving sub-joint MWD 6 is installed on In the MWD inclinometer system, the magnetic signal conversion device is located within the range of the magnetic induction transmitting coil 8 of the receiving sub-section 1 near the drill bit; the MWD inclinometer is at the upper end of the inclinometer near the drill bit; It is installed between the drill bit and the screw rod; the short joint 1 near the drill bit is installed between the screw rod and the non-magnetic drill collar through threads.

Referring to the accompanying drawings, near the drill bit measurement nipple 18, the data acquisition circuit 15 installed on the main body includes an acceleration processing module, a temperature processing module, an angular velocity processing module, a Geiger counter processing module and a voltage processing module, and a pressure-bearing jacket 12 is installed on the outside. A transmitting coil 13 is housed in it.

Referring to the accompanying drawings, near the drill bit receiving sub-joint 1, the data receiving circuit 10 installed on the main body includes a processing module of the pressure-on-bit sensor 9, a processing module of the torque sensor 3, and a processing module of the outer annular air pressure sensor 11, and a magnetic induction jacket 4 is installed on the outside. It is equipped with a receiving coil 7 and a magnetic induction transmitting coil 8 .

The near-bit measuring sub 18 and the near-drill receiving sub 1 communicate wirelessly across the small gap of the screw, and transmit the data to the near-drill receiving sub 1 through the mud. The near-drill receiving sub 1 adopts a wireless communication method that penetrates the metal wall. The parameter data measured by the drill bit measurement sub-section 18 and the parameter data measured by itself are transmitted to the MWD receiving sub-section 6, and finally the parameter data required for real-time drilling are sent to the surface information processing equipment through the MWD inclinometer.

The utility model implementation case has been introduced in detail above, and has set forth the specific case method of the specific implementation mode in the actual use process, and the explanation of the above implementation example is only used to help understand the inclinometer of the inventive method; meanwhile, for those in the art Ordinary technicians, according to the idea of the method of the present invention, there will be changes in the specific implementation and scope of application. In summary, the contents of this specification should not be understood as limitations on the use of the method.

Claims (2)

1. nearly drill bit directional tool, it is characterized in that by terrestrial information treatment facility, MWD inclinometer, nearly drill bit measures pipe nipple, nearly drill bit receives pipe nipple and MWD reception pipe nipple forms, MWD receives pipe nipple and is arranged in MWD inclinometer system, and its magnetic signal conversion equipment receives within the scope of pipe nipple magnetic strength transmitting coil between nearly drill bit; MWD inclinometer is in nearly drill bit directional tool upper end; Nearly drill bit is measured pipe nipple and is arranged between drill bit and screw rod by screw thread; Nearly drill bit is received pipe nipple and is arranged between screw rod and non magnetic drill collar by screw thread.

2. nearly drill bit directional tool according to claim 1, it is characterized in that nearly drill bit measures pipe nipple and nearly drill bit receives the wireless telecommunications of pipe nipple leap screw rod small gap, send data to nearly drill bit by mud and receive pipe nipple, nearly drill bit receives the wireless communication mode that pipe nipple adopts penetrating metal wall, nearly the drill bit supplemental characteristic measured measured by pipe nipple sends MWD to the supplemental characteristic self surveyed and receives pipe nipple, and eventually through MWD inclinometer, real-time drilling desired parameters data is sent to terrestrial information treatment facility.