CN2073933U

CN2073933U - Hydraulic driving type underground isotopic releaser

Info

Publication number: CN2073933U
Application number: CN90213769U
Authority: CN
Inventors: 程志威; 丁国安; 王凤启
Original assignee: Well Logging Co of Liaohe Petroleum Exploration Bureau
Current assignee: Well Logging Co of Liaohe Petroleum Exploration Bureau
Priority date: 1990-08-31
Filing date: 1990-08-31
Publication date: 1991-03-27

Abstract

The utility model relates to an underground isotopic releaser used for radioisotope logging for oil fields. When stratigraphic water absorption is measured by a water injection well, isotope carriers can be injected to strata automatically by the utility model. The injection mode of the prior art is from a well head to pour in, and because of the inhomogeneous permeability of the strata, the actual water absorption of the strata is difficult to ensured, in particular for the strata with poor imbedibility, the situation is obvious. The isotope carriers are poured from the well head, and the whole water injection well can be polluted to make the radioisotope logging affected. By using the utility model, isotope can be injected directly aiming the strata, and the defects are avoided. The utility model is composed of an ignition chamber, an upper releasing body, a lower releasing body and a buffer device. Because the utility model has the advantages of simple structure and convenient operation, the utility model can be widely used for underground radioisotope logging construction for oil fields.

Description

Hydro powered formula borehole isotope releaser

The utility model belongs to water injection well in oil fields at used a kind of instrument of when well logging; Be particularly related to a kind of downhole tool that is used in well, injecting isotopic carrier.

The oil field is in recovery process, need constantly research oilbearing stratum produce oil situation, so that make the oil well can steady in a long-term, high yield, present stage most Oilfield using water flooding regimes improve oil well yield, therefore just must understand the adsorption capacity of Different Strata in advance by method for testing strata, water injection rate what determine at last again; This method of testing is: pour isotopic carrier in from well head toward well, after making stratum absorption with different adsorption capacities, again whole injection well section is measured with the radioactive logging instrument, and the shortcoming that adopts well head directly to pour isotopic carrier in the well into is: owing to the sleeve pipe back pressure is bigger, isotopic carrier is difficult for pouring into, so that cause the pollution of full well section, make measured isotopic curves be difficult for the correct stratum water absorption of distinguishing.The 2nd, because pouring into of full well section, can be for the hyposmosis target zone because of sucking difficulty, reflection suction situation that can not be correct on the measurement curve; And the utility model is that isotopic carrier is sealed in the container, directly is released in the target zone and goes, and it can overcome above-mentioned shortcoming, and can make measured isotopic curves can reflect really the stratum liquid absorption how much.

The purpose of this utility model is to provide a kind of downhole hardware that can discharge isotopic carrier in water injection well automatically, when this release discharges isotopic carrier, and polluted reservoir not, and can discharge isotopic carrier according to construction needs any layer of position in well.Avoided longer, and can not make the isotopic curves of being surveyed correctly reflect the drawback of stratum soakage in the well because of isotopic carrier traveling time in well.

The utility model is to realize like this.

At first isotopic carrier is packed in the isotope storehouse, in cable handle assembly lower going-into-well, when arriving target zone dispensing isotopic carrier, the operating point ignition system just can be injected the stratum with isotope in the storehouse.

The utility model be one by buffering joint, ignition system with go up and discharge assembly, the isotope storehouse is formed, profile is the device of going into the well of cylindrical shape.

During construction, with this device with radioactivity logging device G.I.H simultaneously, carry out the measurement of nature gamma curve base value, then again this is installed down to the desired depth position, handle ignition system and can light the interior coyote hole gunpowder of ignition body, the explosion gas that produced thus promote to go up relief valve 9 along last release valve body 8 to lower slider, make the inlet opening 16 above the releaser 8, be exposed, liquid in the well just can flow in the isotope storehouse 10 by this hole, and mix with the isotopic carrier of the inside, the warp weep holes 15 above the releaser 11 is down injected the stratum, realizes isotopic dispose procedure.

For fear of because of the ignition body explosion time, the shock wave that produces is bad with this device top measuring apparatus shake, specially on ignition body 7, insert buffering joint 3, and buffer bar 2 and buffering joint 1 are housed on buffering joint 3, alleviate the destruction of shock wave instrument with a pipe nipple 6.

The utility model is provided by following examples.

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

Accompanying drawing 1-3 is a hydro powered formula borehole isotope releaser structural representation.

Accompanying drawing 4 is put device complete structure schematic diagram for hydro powered formula underground isotope is long-pending.

It by buffering go up joint 1, buffer bar 2, buffering joint 3, joint 4, buffering down joint 5, pipe nipple 6, ignition body 7, go up releaser 8, go up relief valve 9, isotope storehouse 10, down releaser 11, relief valve 12, negative pressure cabin 13, weep hole 15, inlet opening 16 are formed down.

This device can be divided into five parts:

Buffer portion, ignition body, last releaser, following releaser and negative pressure cabin.

One, buffer portion:

This device top is buffer locations, on connect the screen layer that its material is tungsten nickel, iron, joint 1 is gone up for buffering in the bottom, there is a buffer bar 2 the inside of joint 1 on buffering, the effect of this buffer bar is to avoid causing the upper part measuring apparatus to damage in the moment that underground isotope discharges because of the ignition body blast produces sharp pounding, buffering joint 3 is gone up joint 1 usefulness screw thread with buffering and is bound up on simultaneously, the interior screw thread of joint 1 usefulness links to each other with buffer bar 2 on the buffering, at the center of buffer bar 2 round tube hole is arranged, harness can therefrom pass; In the chamber of buffering joint 3 bottoms, be full of transformer oil, lead passes from the buffer bar center, well is connected with line trap 4, through cushion down save 5 lower end be attached at ignition body 7 above.

Two, ignition body

It is positioned at releaser 8, ignition body is actual to be a hollow part cylinder, in hollow part gunpowder is housed, after the energising can by the resistance wire of inside gunpowder is lighted and produce explosion gas will go up relief valve 9 and down relief valve 12 promote to glide, make delivery port 15, water inlet 16 by open-minded, at this moment, (this storehouse is that a specification is to isotopic carrier: the cylinder that ∮ is 30 * 450 millimeters) inject in the stratum under the gas effect by flowing out in the isotope storehouse.

Three, go up the releaser position:

Last releaser 8 links by screw thread and isotope storehouse 10, is uniform-distribution with three ducts that intake on last releaser, has in this releaser between a relief valve 9 and the releaser for being slidingly matched, can be to lower slider under the explosion gas effect.

Four, following releaser position:

Following releaser 11 connects by screw thread and isotope storehouse 10, be uniform-distribution with three ducts above the releaser equally down, a following relief valve 12 is arranged in the following releaser, and between the following releaser for being slidingly matched, following relief valve can enter in the negative pressure cabin in the effect lower slider of fluid column, weep hole 15 is opened, and isotopic carrier flows into the stratum through weep hole 15.

Claims

1, a kind of down-hole carrier applicator that is used for the oil field radioisotope logging: include buffering joint 3 and with screw thread be bound up on the bottom ignition body 7 and last releaser 8, discharge body 11 down and form; It is characterized in that:

A charging room is arranged in A, the described ignition body 7, gunpowder and resistance wire (among the figure draw) are arranged in the charging room, resistance wire is connected with ignition lead by the device centre,

Have one to go up relief valve 9 in B, the last releaser 8, its outside is uniform-distribution with three inlet openings 16,

A following relief valve 12 is arranged in the following releaser 11, and its outside is uniform-distribution with three weep holes 15.

2, device according to claim 1; It is that tungsten, nickel, ferroalloy are made that there is its material of screen layer the upper part that it is characterized in that joint 1 on the buffering of this device.

3, device according to claim 1; It is characterized in that down relief valve 9 and following relief valve 12, with 8 times releasers 11 of last release valve body between cooperate for being slidingly matched.