CN202788754U

CN202788754U - Downhole tool hydraulic controlling switch

Info

Publication number: CN202788754U
Application number: CN 201220500419
Authority: CN
Inventors: 李治淼; 张强; 丁宇奇; 刘巨保; 梅冬琴
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2012-09-28
Filing date: 2012-09-28
Publication date: 2013-03-13
Anticipated expiration: 2022-09-28

Abstract

The utility model discloses a downhole tool hydraulic controlling switch which solves the problem that no researches are done on a general controlling switch of an existing downhole tool detecting device. A body of the downhole tool hydraulic controlling switch is a drill collar. A sealed cavity is preformed on the side wall of the drill collar. A singlechip, a singlechip battery and a triggering device are fixed in the sealed cavity. A piston mechanism is arranged between a center hole of the drill collar and the sealed cavity. A spring is sleeved outside the piston rod. A spring baffle is arranged at the right side of the spring. A piston is further provided with a touch plate, and the triggering device is started by the touch plate. When the inner pressure difference of the drill collar is larger than the outer pressure difference of the drill collar, the piston moves rightwards, the triggering device is started by the touch plate, and the downhole tool detecting device starts. When the inner pressure difference and the outer pressure difference of the drill collar disappear, the spring is reset, the triggering device is dropped by the touch plate, and the switch is opened. The inner pressure difference and the outer pressure difference of the drill collar is adopted by the downhole tool hydraulic controlling switch, influence of downhole static pressure to the control of the switch is eliminated effectively. The whole device is simple in structure, and is a pup joint. The downhole tool hydraulic controlling switch can trip in the downhole along with a drilling rod, normal drilling is not affected, and the downhole tool hydraulic controlling switch is convenient to use.

Description

The downhole tool pilot-controlled switch

Technical field

The utility model relates to a kind of oilfield downhole operation gauge tap.

Background technology

Lot of domestic and international scholar has done a lot of researchs about downhole tool pilot-controlled switch and control device thereof, such as the pumpingh well downhole control valve for pumpingh well production and workover treatment of Li Fushan development; The down-hole switch for the sand control tubing string of Zheng Bisuo development; The inner slide sleeve-type downhole switch of the development such as Zhang Hui.

Wherein the oil pumper downhole control valve of Li Fushan is provided with hollow float in the valve body, utilizes the characteristics of hollow float, realizes the switch of control valve, and this control valve is applied to oil well production and well workover; The down-hole switch for the sand control tubing string of Zheng Bisuo utilizes heat sensitive material to make plunger, and the characteristics that plunger melts are at a certain temperature carried out switch control; And the inner slide sleeve-type downhole switch of the development such as Zhang Hui, the built-in sliding sleeve of valve body slides over and cuts short pin under the differential pressure action, realizes switch control, and this inner slide sleeve-type downhole switch uses when down hole drill; Above-mentioned down-hole switch has all been brought into play effect separately preferably in field separately, and does not also study at present for the general controls switch of down-hole equipment checkout gear specially.

Summary of the invention

The purpose of this utility model provides a kind of gauge tap that uses for the down-hole equipment checkout gear.

For achieving the above object, the technical scheme that the utility model adopts is: the downhole tool pilot-controlled switch, its body is drill collar, prefabricated fluted at the sidewall of drill collar, the top bolt of groove is connected with end cap, form sealed cavity between end cap and the groove, center at sealed cavity arranges the through hole that is communicated with the drill collar centre bore, the built-in piston of through hole, with piston over against end cap on the second through hole is set, built-in the second piston of this second through hole, piston rod is set between two-piston, the piston rod overcoat has spring, and the right-hand member of spring arranges check ring, and the flank of check ring is bolted in the sealed cavity, fixing single-chip microcomputer battery in the following sealed cavity of piston rod wherein, fixedly single-chip microcomputer and flip flop equipment on the cover plate in the above sealed cavity of piston rod, fixing touch panel on the right side of piston, this touch panel level moves right to start flip flop equipment with the contact of flip flop equipment and when oppressing this contact.

Beneficial effect: the application's downhole tool pilot-controlled switch, ingeniously utilize that the drill collar external and internal pressure is poor to carry out work, effectively got rid of the impact of down-hole static pressure on switch control, whole apparatus structure is simply ingenious, can make a whole short circuit, can not affect normally and creep into under the drilling rod lower going-into-well, very easy to use.

Description of drawings

Fig. 1 is the structural representation of the utility model pilot-controlled switch.

Fig. 2 is the enlarged drawing of I among Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing the application is further described:

By Fig. 1 in conjunction with shown in Figure 2: the downhole tool pilot-controlled switch, its body is drill collar 1, at the sidewall of drill collar 1 prefabricated fluted 2, the top bolt of groove 2 is connected with end cap 6, form sealed cavity 4 between end cap 6 and the groove 2, center at sealed cavity 4 arranges the through hole that is communicated with the drill collar centre bore, the built-in piston 12 of through hole, with piston 12 over against end cap 6 on the second through hole is set, built-in the second piston 9 of this second through hole, piston rod 8 is set between two-piston, piston rod 8 overcoats have spring 13, the right-hand member of spring 13 arranges check ring 7, the flank of check ring 7 is bolted in the sealed cavity 4, fixing single-chip microcomputer battery 10 in the sealed cavity of piston rod below 8 wherein, fixedly single-chip microcomputer 3 and flip flop equipment on the interior cover plate of the sealed cavity of piston rod more than 8, fixing touch panel 11 on the right side of piston 12, these touch panel 11 levels move right and start flip flop equipment when contacting with the contact 5 of flip flop equipment and oppress this contact 5.

This downhole tool pilot-controlled switch, concrete operations are as follows: when putting into the down-hole, two pistons of this pilot-controlled switch have been offset the static pressure in shaft bottom, when mud begins to circulate, drill collar 1 internal pressure is greater than drill collar 1 external pressure, pressure differential pushing piston 12 moves right, the touch panel 11 that is fixed together with piston 12 moves right simultaneously, contact and start flip flop equipment when oppressing this contact 5 with the contact 5 of flip flop equipment on being installed in end cap 6, the work of checkout gear under the control well, at this moment, spring 13 is in confined state.When mud stops circulation time, the poor disappearance of drill collar 1 external and internal pressure, spring 13 resets, and flip flop equipment contact 5 and touch panel 11 are disengaged, and the downhole tool pilot-controlled switch is opened.

Claims

1. downhole tool pilot-controlled switch, its body is drill collar, it is characterized in that: prefabricated fluted at the sidewall of drill collar, the top bolt of groove is connected with end cap, form sealed cavity between end cap and the groove, center at sealed cavity arranges the through hole that is communicated with the drill collar centre bore, the built-in piston of through hole, with piston over against end cap on the second through hole is set, built-in the second piston of this second through hole, piston rod is set between two-piston, the piston rod overcoat has spring, the right-hand member of spring arranges check ring, the flank of check ring is bolted in the sealed cavity, fixing single-chip microcomputer battery in the following sealed cavity of piston rod wherein, fixedly single-chip microcomputer and flip flop equipment on the interior cover plate of the above sealed cavity of piston rod, fixing touch panel on the right side of piston, this touch panel level move right to start flip flop equipment with the contact of flip flop equipment and when oppressing this contact.