CN201273187Y

CN201273187Y - Formation pressure detection apparatus while drilling

Info

Publication number: CN201273187Y
Application number: CNU200820210641XU
Authority: CN
Inventors: 宋朝晖; 罗维; 周强; 唐亮
Original assignee: Karamay Drilling Technology Institute of CNPC Western Drilling Engineering Co Ltd
Current assignee: CNPC Xibu Drilling Engineering Co Ltd
Priority date: 2008-09-23
Filing date: 2008-09-23
Publication date: 2009-07-15
Anticipated expiration: 2018-09-23

Abstract

The utility model relates to a formation pressure detecting device while drilling for an oil drilling, wherein the upper end of a turbine clutch controller (2) is connected with a power turbine (1), and the lower end thereof is connected with a hydraulic pump (3), a circuit bin (4) is arranged in the cavities of the hydraulic pump (3) and a pressure sensor (5), the pressure sensor (5) is located on the lower portion of the circuit bin (4) to communicate with the inner cavity of a pressure relief valve (6), a pressure relief pump motor (7) is arranged on the lower end of the pressure relief valve (6), an integrated change-over valve (8) is respectively connected with a drill bit driving motor (12) and a pulling piston (11) through a cable and a power line, and one end of the drill bit driving motor (12) is connected with the pressure relief valve (6), and the other end thereof is connected with a hollow drill bit (10), sealing rubber (9) is sleeved on the outer surface of the hollow drill bit (10), and the pulling piston (11) is sleeved on one end of the outer surface of the sealing rubber (9). The detecting device can detect and provide the accurate formation pressure in time, and controls the well drilling and the reasonable drilling liquid column pressure in time.

Description

A kind of with boring the formation pressure detection device

Technical field

The present invention relates to the measurement while-drilling instrument that oil drilling is used, particularly a kind of device that in drilling process strata pressure is detected in real time belongs to the device for subsurface measuring class.

Background technology

By land with offshore oil drilling practice process in, generally can bore the chance abnormal formation pressure, especially bore the high pressure formation run into and more than low-pressure stratum more and see.The abnormal pressure stratum is having a strong impact on the safety of drilling well, if fail in time to detect or predict and may bore the abnormal pressure stratum that runs into, the problem of following several respects will occur:

When (1) the drilling fluid column pressure of Shi Yonging is less than strata pressure, can cause serious well kick or gas blowout accident;

(2) if used drilling fluid column pressure during greater than the fracture pressure on stratum, will cause leakage again, and the drilled oil and gas reservoir of opening of severe contamination, especially bigger to the natural gas pool influence, cause killing oil-gas Layer, cause the mud logging unit device to detect and survey unusually, can not go out oil gas in the gas testing process less than gas.

Summary of the invention

The utility model is to provide a kind of can detect strata pressure at any time, and control reasonable drilling head of liquid provides foundation when creeping into for the bottom.

For achieving the above object, the utility model adopts following technical scheme: mainly be made up of dynamical system, pressure detecting system and backup system, dynamical system is made of power turbine, turbine clutch controller, hydraulic pump, the power turbine lower end connects the turbine clutch controller, and the hydraulic pump upper end connects the turbine clutch controller; Pressure detecting system is made of circuit storehouse, pressure sensor, reducing valve and drawdown pump motor, in the cavity of circuit position in storehouse between hydraulic pump and pressure sensor, reducing valve is an one way valve, pressure sensor is positioned at below, circuit storehouse and communicates with the reducing valve inner chamber, it has cable and wire to be connected with the circuit storehouse, and the drawdown pump motor is positioned at the reducing valve lower end; The backup system is made of integrated change valve, caulking gum, hollow boring bit, backup piston and drill bit CD-ROM drive motor, integrated change valve has cable and wire to be connected with drill bit CD-ROM drive motor and backup piston respectively, drill bit CD-ROM drive motor one end is connected with the port of export of reducing valve vertical boreholes axis, its other end is connected with hollow boring bit, caulking gum is enclosed within on the hollow boring bit external surface, caulking gum external surface one end suit backup piston.

The beneficial effects of the utility model are that apparatus and process is simple, cost is low, can detect strata pressure in real time, for the reasonable control of creeping into middle drilling fluid column pressure provides foundation.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

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

As shown in Figure 1 a kind of mainly is made up of dynamical system, pressure detecting system and backup system with boring the formation pressure detection device; Dynamical system is made of power turbine 1, turbine clutch controller 2, hydraulic pump 3, and power turbine 1 lower end connects turbine clutch controller 2, and hydraulic pump 3 upper ends connect turbine clutch controller 2; Pressure detecting system is made of circuit storehouse 4, pressure sensor 5, reducing valve 6 and drawdown pump motor 7, in the cavity of circuit storehouse 4 between hydraulic pump 3 and pressure sensor 5, reducing valve 6 is an one way valve, pressure sensor 5 is positioned at 4 belows, circuit storehouse and communicates with reducing valve 6 inner chambers, it has cable and wire to be connected with circuit storehouse 4, and drawdown pump motor 7 is positioned at reducing valve 6 lower ends; The backup system is made of with drill bit CD-ROM drive motor 12 integrated change valve 8, caulking gum 9, hollow boring bit 10, backup piston 11, integrated change valve 8 has cable and wire to be connected with drill bit CD-ROM drive motor 12 and backup piston 11 respectively, drill bit CD-ROM drive motor 12 1 ends are connected with the port of export of reducing valve 6 vertical boreholes axis, its other end is connected with hollow boring bit 10, caulking gum 9 is enclosed within on hollow boring bit 10 external surfaces, caulking gum 9 external surfaces one end suit backup piston 11.

The main effect of dynamical system is for the backup system provides power, turbine clutch controller 2 mainly as being to connect and cut off passage between power turbine 1 and the hydraulic pump 3, and then control hydraulic pump 3 is worked.

It is to be used to place the electronic circuit of controlling with the pressure of the drill force detection system whole that pressure detecting system mainly acts on; 4 belows, circuit storehouse are pressure sensors 5, and pressure sensor 5 is connected with electronic circuit in the circuit storehouse 4 by cable; The main effect of reducing valve 6 is after finishing formation pressure detection, will discharge with the pressure of the drill force checking device pressure inside, makes the internal pressure of device and external pressure reach equilibrium state, avoids device to bear too high pressure; The main effect of drawdown pump motor 7 is to provide power for reducing valve 6.

It is that hollow boring bit 10 is sent in the stratum that the backup system mainly acts on, and finishes the detection to strata pressure; Integrated change valve 8 is between hollow boring bit 10 and hydraulic pump 3, it mainly acts on is to release caulking gum 9 and backup piston 11 with the pressure of the drill force checking device and be close to surface of stratum by regulating reversal valve, caulking gum 9 and backup piston 11 is withdrawn into in the pressure of the drill force checking device after detection is finished again; Caulking gum 9 is positioned at hollow boring bit 10 both sides, and main effect is that stratum to be measured and space outerpace are isolated, and guarantees that pressure sensor 5 detected pressure are strata pressure to be measured; Backup piston 11 is positioned at the outside of caulking gum 9, is mainly used in caulking gum 9 is applied an external force, guarantees the sealing effectiveness of caulking gum 9; Hollow boring bit 10 is positioned at caulking gum 9 inside, and the drill bit CD-ROM drive motor provides power for hollow boring bit 10.

Its operating principle is: when arriving position of stratum to be measured with the pressure of the drill force checking device, power turbine 1 is started working, driving hydraulic pump 3 is released caulking gum 9 and backup piston 11 with the pressure of the drill force checking device and is close on the stratum to be measured, backup piston 11 compresses caulking gum 9, guarantees sealing effectiveness.Drill bit CD-ROM drive motor 12 is started working then, hollow boring bit 10 is advanced stratum to be measured, this moment stratum to be measured with the inner connected state that forms of the pressure of the drill force checking device, pressure sensor 5 is treated the pressure of geodetic layer and is measured, electronic circuit is analyzed and is stored the data that measure.After pressure detecting is finished, drill bit CD-ROM drive motor 12 is regained hollow boring bit 10, do not form with stratum to be measured with the pressure of the drill force checking device this moment and be communicated with, drawdown pump motor 7 drives reducing valve 6 and starts working, to putting pressure, the pressure of the drill force checking device pressure inside is consistent for outside pressure with the pressure of the drill force checking device inside.Put press finish after, integrated change valve 8 is started working, hydraulic pump 3 is withdrawn into caulking gum 9 and backup piston 11 with the pressure of the drill force checking device inside, whole pressure detecting process finishes.

Claims

1, a kind of with boring the formation pressure detection device, it is characterized in that: mainly form by dynamical system, pressure detecting system and backup system; Dynamical system is made of power turbine (1), turbine clutch controller (2), hydraulic pump (3), and power turbine (1) lower end connects turbine clutch controller (2), and hydraulic pump (3) upper end is connected with turbine clutch controller (2); Pressure detecting system is made of circuit storehouse (4), pressure sensor (5), reducing valve (6) and drawdown pump motor (7), circuit storehouse (4) is positioned at the cavity between hydraulic pump (3) and the pressure sensor (5), reducing valve (6) is an one way valve, pressure sensor (5) is positioned at below, circuit storehouse (4) and communicates with reducing valve (6) inner chamber, it has cable and wire to be connected with circuit storehouse (4), and drawdown pump motor (7) is positioned at reducing valve (6) lower end; The backup system is made of with drill bit CD-ROM drive motor (12) integrated change valve (8), caulking gum (9), hollow boring bit (10), backup piston (11), integrated change valve (8) has cable and wire to be connected with drill bit CD-ROM drive motor (12) and backup piston (11) respectively, drill bit CD-ROM drive motor (12) one ends are connected with the port of export of reducing valve (6) vertical boreholes axis, its other end is connected with hollow boring bit (10), caulking gum (9) is enclosed within on hollow boring bit (10) external surface, caulking gum (9) external surface one end suit backup piston (11).