CN2148175Y

CN2148175Y - Electric isotope releasing device

Info

Publication number: CN2148175Y
Application number: CN93205217U
Authority: CN
Inventors: 张洪祥; 韩承彬; 李定立; 肖广达
Original assignee: WELL LOGGING CO HUABEI PETROLEUM ADMINISTRATION BUREAU
Current assignee: WELL LOGGING CO HUABEI PETROLEUM ADMINISTRATION BUREAU
Priority date: 1993-03-10
Filing date: 1993-03-10
Publication date: 1993-12-01
Anticipated expiration: 2003-03-10

Abstract

The utility model relates to an electric isotope releasing device for a water injection well of an oilfield, which is mainly composed of a bearing pipe, a storage bin shell, an injection hole, a piston, etc. The utility model is characterized in that an electric motor is arranged in the bearing pipe, and is connected with a push rod through a drive mechanism to push the piston to move up and down, and a release hole is opened or the piston is reset. The utility model has easy use, has no need of workers to disassemble and reset, can fill a isotope carrier in the well site, and continuously carry out the isotope carrier releasing work to the well. The utility model has small influence on radioactivity of human bodies, and less environmental pollution, and is a replaceable product for isotope releasers.

Description

Electric isotope releasing device

The utility model relates to a kind of logging tool of water injection well in oil fields, is a kind of instrument that discharges isotopic carrier in water injection well.

In oil-field flooding technology, monitor for the situation of each layer of oil well position being injected water, need make the intake profile of tracer results of regular determination water injection well of isotopic carrier, so that adjust water injection technology, improve oil increasing effect.Therefore to be operated in the oilfield development process be important well logging means in the isotope injection profile well logging.For a certain degree of depth in pit shaft discharges isotopic carrier, the pressure type isotope releaser is arranged at present, explosion type isotope releaser and electromagnetic type isotope releaser, their common ground is all to have warehouse, last relief valve, following relief valve, inlet opening, formations such as outage, different is the power difference of opening relief valve, the pressure type release is to rely on the pressure of liquid in the pit shaft to open relief valve, the explosion type release is to rely on the explosive force of explosive to open relief valve, the electromagnetic type release is that the magnetic force that relies on the energising back to produce is opened relief valve, utilize the liquid in the pit shaft, finish the isotopic carrier work that discharges.These releases discharge to need to dismantle behind the isotopic carrier at every turn and clean, and make up and down that relief valve resets, and just can reuse behind the new isotopic carrier of packing into.Carry out these work, human body is longer time of contact, residual isotope on the release has certain influence to human body, should not on the well site, carry out this work, need bring back in the special service depot and carry out, therefore each well release isotope of going up all needs to carry many mounted isotope releasers, uses up the back and just can only quit work, just can work on after returning to reinstall, so these releases use very inconvenient.

The pressure type release relies on the interior liquid of pit shaft to cut off pin or crush diaphragm in addition, because the foozle of pin or diaphragm, the degree of depth that discharges in the down-hole also can produce bigger error.The explosion type release relies on the explosive force of explosive, therefore the quantity of installation explosive and the quality requirement of explosive own is all compared strictness, otherwise can produce accident, even release and downhole probe are damaged.

The purpose of this utility model is in order to provide a kind of less to the human body radiological effect, environmental pollution is less, electronic isotope releaser easy to use, this release are that powered release piston moves up and down with the motor, realize discharging isotope or making piston reset.

The technical solution of the utility model is achieved in that a kind of electronic isotope releaser that is used for the oil well well logging, have the hole of pouring into and tap on the warehouse shell that is linked together by the pressure-bearing pipe, with the pressure-bearing pipe, the warehouse shell, piston is installed in the warehouse to be constituted, its special character is in the pressure-bearing pipe motor to be installed, motor is linked together by reducer and ball-screw transmission mechanism, the overcoat of ball-screw transmission mechanism is linked together by drive sleeve and push rod, and piston is installed on the push rod.

In technique scheme, its special character is: the warehouse shell is linked together by center tap and pressure-bearing pipe, has the hole of pouring on the center tap, baffle ring and ball-and-seat is housed pouring into hole place, and warehouse shell lower end is connected to releasing-joint, has release aperture on the releasing-joint.

The utility model has the advantages that and to discharge isotope in projected depth exactly, discharged the isotopic carrier back piston without manual reset at every turn, do not need to dismantle the part isotopic carrier of can packing into once more, it is very short that dress is irritated the non-cutting time of isotopic carrier, very convenient, isotope can be reduced to bottom line to the influence of human body, be suitable for the work of on-the-spot dress filling isotopic carrier in the well site, therefore use this isotope releaser, each well of going up only can carry out the inferior isotope release of many mouthfuls of wells with one, can significantly reduce working programme, reduce construction cost.Use this release, can also avoid the radioactive pollution of isotope, help protecting environment well site, wellhead equipment and the above tubing string of oil reservoir.

Fig. 1 is the utility model the first half generalized section.

Fig. 2 is the utility model the latter half generalized section.

Embodiment, in conjunction with the accompanying drawings:

Micromotor 2 is the existing finished products that combine as a whole with reducer 3, be installed in the upper end of axle sleeve 4, the output of reducer 3 is linked together by shaft coupling 5 and screw rod 8, ball screw transmission mechanism 11 is installed in the inner chamber of axle sleeve 4, and axle sleeve 7 and ring washer 9 are installed between the upper end of screw rod 8 and the axle sleeve 4.Ball-screw transmission mechanism 11 is made of screw rod 8, overcoat, intermediate sleeve, ball etc.Select existing finished product in the present embodiment for use, have certain stroke (23mm), after reaching prescribed stroke, can stop axially-movable automatically.The overcoat of ball screw transmission mechanism 11 connects with drive sleeve 12 by screw thread, and resilient key 13 is installed on the drive sleeve 12, and the two ends of resilient key 13 are stretched in the cannelure of axle sleeve 4, and drive sleeve 12 connects with push rod 15 by screw thread, and fixing with spiral shell fixed 14.Axle sleeve 4 is installed in the pressure-bearing pipe 1, and the pressure-bearing pipe connects with seal nipple 16 by screw thread, and sealing ring 17 is installed between them.The lower end of axle sleeve 4 is installed on the seal nipple 16 by screw thread, and seal nipple 16 lower ends connect with center tap 18 by screw thread, and sealing ring is installed between them.Seal nipple 16 lower ends are equipped with sealing cap 19,22, seal 20,21 is installed in the sealing cap 19,22, has long through-hole 23 on the center tap 18, pour into hole 29, dowel hole 25 is a through hole, spring 27 and locking ball 26 composition ball-and-seats are housed in it, make borehole pressure water can enter warehouse after the unidirectional guide functions of ball-and-seat is gone into the well release, keep in the storehouse and the external pressure balance.Baffle ring 28 with circular hole 30 is installed on the center tap 18, the rotation of can on center tap 18, sliding, and center tap 18 lower ends are linked together by screw thread and warehouse shell 31 upper ends, and sealing ring is installed between them.Upper piston 24 is fixedly mounted on the push rod 15, and sealing ring is installed on the upper piston.Releasing-joint 32 is installed in warehouse shell 31 lower ends by screw thread, releasing-joint 32 is installed in warehouse shell 31 lower ends by screw thread, have long slot bore 36, circular hole 37 on the releasing-joint 32, lower piston 33 is fixedly mounted on push rod 15 lower ends, locating ring 34, screw 35 are housed on it, and screw 35 can be up and down in slotted eye 36.Lower contact 40 is installed in releasing-joint 32 lower ends by screw thread, and sealing ring is installed between them.Tail cap 41 is installed in lower contact 40 lower ends by screw thread.

When in warehouse, pouring into isotopic carrier, rotate baffle ring 28, make circular hole 30 and pour into hole 29 to align, isotopic carrier is joined in the warehouse, rotate baffle ring 28, will pour into hole 29 and seal.Before going into the well, with motor 2 and ground electric equipment power connection, pass through well head, with under the release in the pit shaft projected depth, connect positive supply by the ground electric equipment, the motor turn, driving screw rod 8 rotates, the overcoat, drive sleeve 12 and the push rod 15 that promote ball-screw transmission mechanism 11 move down, upper piston 24 and lower piston 33 are simultaneously descending, and the warehouse upper and lower opening is opened simultaneously, carry isotope releaser on this moment, liquid in the pit shaft flows in the warehouse by long through-hole 23, drives isotopic carrier and flows out in the pit shaft from following Hatch Opening 36,37.After having discharged isotopic carrier, by ground power supply equipment, connect negative supply, the motor counter-rotating resets lower piston 24,33, and release is proposed pit shaft, and reloading isotopic carrier can reuse.

Claims

1, a kind of electronic isotope releaser that is used for the oil-field flooding borehole logging tool, have the hole of pouring into and tap on the warehouse shell that is linked together by the pressure-bearing pipe, with the pressure-bearing pipe, the warehouse shell, piston is installed in the warehouse shell to be constituted, it is characterized in that: motor is installed in the pressure-bearing pipe, motor is linked together by reducer and ball screw transmission mechanism, the overcoat of ball screw transmission mechanism is bound up by drive sleeve and push rod, and piston is installed on the push rod.

2, electronic isotope releaser according to claim 1, it is characterized in that the warehouse shell is linked together by center tap and pressure-bearing pipe, have the hole of pouring on the center tap, baffle ring is housed pouring into hole place, ball-and-seat, warehouse shell lower end are connected to releasing-joint, have release aperture on the releasing-joint.