CN2391010Y

CN2391010Y - Gas steam generator

Info

Publication number: CN2391010Y
Application number: CN 99224870
Authority: CN
Inventors: 付玉峰; 孔庆纯
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-23
Filing date: 1999-08-23
Publication date: 2000-08-09
Anticipated expiration: 2009-08-23

Abstract

The utility model relates to a gas steam generator, which belongs to the field of a corollary device for exploiting the petroleum, and is composed of a head part, a combustion chamber, a water steaming device, a steaming chamber and a tail part. The side walls of the combustion chamber and the steaming chamber are formed by a sandwich structure, and an inner wall and an outer wall of the sandwich structure are connected with each other. A casing of a thick wall is sheathed at the outer side of the sandwich structure, a channel of the cooling water is composed of a hollow cavity formed by each sandwich layer and a hollow cavity between the outer wall of an outer layer sandwich layer and the casing of the thick wall, and the head part and the tail part are arranged at the upper and the lower ends of the casing of the thick wall through screw threads. The utility model has the advantages of less heat loss, high crude-oil heat-recovery efficiency, low crude-oil cost, stable and safety performance, etc., and is a preferred device for the heat-recovery thick oil.

Description

Gas and vapour generator

The utility model relates to a kind of gas and vapour generator, belongs to the corollary equipment of recover petroleum, is the indispensable corollary equipment of thermal recovery high viscosity oil.

The reserves of high viscosity oil account for 2/3 of total oil reservoir., how with its smoothly exploitation come out, but exist always each elephant of puzzlement a difficult problem---that is exactly how to reduce its viscosity.Current, various countries generally use the hot heavy crude producing of high-pressure boiler system, concentrate to steam and deliver to import by pipe network, deliver to the down-hole through oil pipe again and remove to heat oil reservoir, viscous crude temperature rising viscosity is descended, and then realize the purpose to thickened oil recovery.This traditional mining type, although continue to use for many years, its shortcoming is conspicuous, and, cost huge as equipment be high can not pursue well production operation, heat waste and reach 30 one 40%, and oil recovery factor is low, many drawbacks such as cost height.For these reasons, a kind of aboveground gas and vapour generator is arranged in recent years, show that by dropping into the oil field trial production the little investment in light weight of equipment volume is low, the thermal efficiency is high, reduce crude oil cost, can arrive mouth by the well production operation, make the mode of heavy oil heat production bring up to a new height.However, because of it is in aboveground operation, gas vapour is to deliver to down-hole heating oil reservoir by about more than 1,000 meters oil pipe, causes the heat waste that still has 10-15%; Also have volume bigger simultaneously, move time-consuming, not fully up to expectations.Just because of this, the scientific and technical personnel of various countries can be installed in the down-hole in positive development directly to heat the thickened oil recovery equipment of new generation of oil reservoir be the downhole gas vapour generator.Regrettably up to the present, do not see relevant report of succeeing as yet.Why? because work under the adverse circumstances in well below the km, this must have harsher and special requirement to gas and vapour generator, is less than 150mm, slenderness ratio greater than 20 such as external diameter; To bear in it under interior pressure of 16Mpa and the hot conditions more than 2000 ℃ and can guarantee operate as normal, just must have special thermal protection measure and enough intensity and rigidity; How to make and for example that water can fully be vaporized rapidly, main gas-flow in very short time from quickly falling to below 350 ℃ or the like many technical barriers more than 2000 ℃.Only after the problems referred to above are all solved preferably, can succeed, yet the solution of described problem all exists sizable technical difficulty, so up to the present do not see relevant report of succeeing as yet, its reason has just been well imagined.

The purpose of this utility model is to provide that a kind of compact conformation is reasonable, volume is little, in light weight, shift operation convenience, stable performance, safe and reliable, the big heat waste of aerogenesis vapour amount is little, recovery ratio is high; The gas and vapour generator of overall size within limited range.

The purpose of this utility model realizes by the following technical solutions, it is made up of head, combustion chamber, water vaporizer, vaporizer and afterbody, the sidewall of described combustion chamber, vaporizer is to be made of the sandwich that inwall and outer wall are connected with each other, the heavy wall outer cover suit is outside it, the outer wall and the cavity between the heavy wall shell of formed cavity of each interlayer and outer layer interlayer are the passages of cooling water, and head and afterbody are loaded on the upper and lower side of heavy wall shell by screw thread.

Between the outside of described heavy wall shell and interlayer outer wall, the circumferential uniform force-transmitting block that is provided with vertically.

Nozzle on the described head is circumferentially uniform along spray chamber, and the longitudinal axis of its axis and combustion chamber is certain inclination angle.

Be provided with removable larynx footpath adjustable ring in the jet pipe on the described afterbody.

Described inwall and outer wall are to fuse by any mode in pit spot welding, fluting soldering and the corrugated sheet soldering.

The utility model compared with prior art, because the inventor is on the basis of research heavy crude heat extraction technology, condition of work at the downhole gas vapour generator, thereby taked such as multilayer sandwich, the inside and outside wall of interlayer links to each other, with a series of technical measures such as passage that contact each other by force-transmitting block between the heavy wall shell and be equivalent to the cooling water that head and the tail communicate, and reasonable in design is arranged through evidence, volume is little, in light weight, can work reliably at downhole safety, heat waste is minimum, oil recovery factor obviously improves, reduce crude oil cost, advantages such as shift operation is convenient, its outside dimension is below 150mm simultaneously.

Fig. 1 is a main TV structure schematic diagram of the present utility model.

Fig. 2 is the A-A cross section sectional structure schematic diagram of Fig. 1.

Fig. 3 is the main TV structure schematic diagram of another embodiment of the utility model.

Fig. 4 is the B-B sectional structure schematic diagram of Fig. 3.

Fig. 5 is the main TV structure schematic diagram of another embodiment of the present utility model.

Fig. 6 is the C-C cross section sectional structure schematic diagram of Fig. 5.

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, the inwall 12 of combustion chamber 24 sidewalls is through the welding processing moulding with the 1Cr18Ni9Ti stainless steel materials, the lower end puts in the inwall 17 of vaporizer 25 sidewalls with water vaporizer 3 lower ends welded together which is provided with hole for water spraying 2, its outer respectively with its on have the outer wall 13 of the interlayer of

several pits

4,16 is spot-welded together, heavy wall shell 11 is set in outside it, and the circumferential uniform force-transmitting block 1 that is provided with vertically between the outside of the outer wall 16 of interlayer, each layer interlayer and heavy wall shell 11 inboards are the passages 18 of cooling water with the cavity of the outer wall 16 of interlayer, 15,14; Which is provided with the head 6 of igniter 7, nozzle 8 and the jet pipe 19 on the afterbody, connecting tube 21 and be loaded on the upper and lower side of heavy wall shell 11 by screw thread, nozzle 8 is circumferentially uniform along spray chamber 5, is certain inclination angle between the longitudinal axis of its axis and combustion chamber 24; The cooling water inlet 10 that one end communicates with high-pressure water, the other end communicates with the water inlet end of the passage 18 of cooling water; Be provided with removable larynx footpath adjustable ring 20 in the described jet pipe 19; Shown in Fig. 3 .4 is another embodiment of the present utility model, fuse each other by soldering between the outer wall 22 of the interlayer of one side fluting 30 and the inwall 12 of combustion chamber 24 sidewalls, outer wall 23 solderings of the inwall 17 of vaporizer 25 sidewalls and the interlayer of inboard fluting 30 together, the inwall 17 of its vaporizer 25 sidewalls upwards extend to always with the outer wall 22 of interlayer simultaneously, heavy wall shell 11 is sleeved on outside the outer wall 23 of interlayer, contact by force-transmitting block 1 to each other, head 11 and afterbody are loaded on the upper and lower side of heavy wall shell 11 by screw thread.Shown in Fig. 5,6 is the embodiment that is provided with

corrugated sheet

28,29 between the inwall 17 of inwall 12, vaporizer 25 sidewalls of the

outer wall

27,26 of interlayer and combustion chamber 24 sidewalls.And between the

outer wall

27,26 of the inwall 17 of the inwall 12 of combustion chamber 24 sidewalls, vaporizer 25 sidewalls and interlayer by

corrugated sheet

28,29 solderings together, contact by force-transmitting block 1 between the outer wall 26 of interlayer and the heavy wall shell 11.

When the utility model uses, this generator is delivered to the down-hole from petroleum pipeline, place above the oil reservoir and put in oil reservoir by connecting tube 21, high pressure fuel, pressure-air passes through the fuel gallery 9 of nozzle 8 respectively, air duct enters nozzle 8, spray into spray chamber 5 in further blending atomizing after mixing and then lighted through giving by igniter 7, enter in the combustion chamber 24 and burn, contain nitrogen, the gas-flow of carbon dioxide gas enters water vaporizer 3, high-pressure cooling water from water inlet 10 in turn through the passage 18 of supercooled water, 15,14 backs are by hole for water spraying 2 ejections of water vaporizer 3, carry out interchange of heat heat release cooling with the mutual blending of main gas-flow, water is vaporized rapidly, formation contains N2, CO2 gas contains the gas vapour heat transfer medium of water vapour again through the larynx footpath of jet pipe 19 adjustable ring 20, connecting tube 21 sprays into heavy oil tested layer, heavy oil tested layer is heated, its viscosity is reduced, and then viscous crude is successfully come out the purpose of realization heavy oil heat production by exploitation.

Claims

1, a kind of vapour gas generator, form by head (6), combustion chamber (24), water vaporizer (3), vaporizer (25) and afterbody, the sidewall that it is characterized in that described combustion chamber (24), vaporizer (25) is to be made of with the sandwich that outer wall (13), (16), (22), (23), (27), (26) are connected with each other inwall (12), (17), and heavy wall shell (11) is set in outside it; Cavity between the outer wall (16) of formed cavity of each interlayer and outer field interlayer, (23), (26) and the heavy wall shell (11) is passage (14), (15), (18) of cooling water, and head (6) and afterbody are loaded on the upper and lower side of heavy wall shell (11) by screw thread.

2, generator according to claim 1 is characterized in that between the outside of outer wall (16), (23), (26) of described heavy wall shell (11) and interlayer, circumferentially the uniform force-transmitting block (1) that is provided with vertically.

3, generator according to claim 1 it is characterized in that the nozzle (8) on the described head (6) is uniform along spray chamber (5), and the longitudinal axis of its axis and combustion chamber (24) is certain inclination angle.

4, generator according to claim 1 is characterized in that being provided with in the jet pipe (19) on the described afterbody removable larynx footpath adjustable ring (20).

5, generator according to claim 1 is characterized in that described inwall (12), (17) are to fuse by any mode in pit (4) spot welding, fluting (30) soldering and corrugated sheet (28), (29) soldering with outer wall (3), (16), (22), (23), (27), (26).