CN201705266U - Coalbed gas wellhead device for exhausting coal water and gas and injecting water - Google Patents

Abstract

The utility model relate to a coalbed gas wellhead device for exhausting coal water and gas and injecting water, which comprises an upper body A, a coal-water separation device 2, a large bending pipe 4, a coal water exhaust valve 5, a medium flange 6, a water exhaust valve 11, a large flange 15, a casing flange 16, a water injecting pipeline 17, water injecting valves 18, a four-way 19, a one-way valve 20, a small flange 21, a gas outlet pipeline 23, a filter 24, a small bending pipe 25, a gas outlet valve 26 and bolts 28, wherein the upper body A is in fastening connection with the casing flange 16 through the bolt 28, and the coal water exhaust valve 5, the coal-water separation device 2 and the one-way valve 20 are in fastening connection with the upper body A through the medium flange 6, the large flange 15 and the small flange 21; the head and the tail of the large bending pipe 4 are respectively connected with the coal water exhaust valve 5 and a mixture inlet 3, and the bottom of the four-way 19 is fixedly connected with the one-way valve 20; the left end of the four-way 19 is provided with the water exhaust valve 11 which is connected with a water exhaust port 12, and the filter 24 is arranged at the upper end of the small bending pipe 25; and the lower end of the small bending pipe 25 and the gas outlet valve 25 are arranged together, and three independent pipelines, i.e., a coal water exhaust pipeline 17, a water injecting pipeline 22 and a gas outlet pipeline 27, are arranged in the upper body A. The utility model has simple and compact structure, convenient installation, and the integration of coal water and gas exhaust and water injection during the exploitation of coalbed gas operation.

Description

A kind of coal bed gas well array coal water water filling exhaust wellhead assembly

Technical field

The utility model relates to a kind of coal bed gas well wellhead assembly, and particularly a kind of of coal-bed gas exploitation can arrange coal water, exhaust, wellhead assembly that again can water filling.

Background technology

Wellhead assembly is the visual plant that guarantees the coal bed gas well ordinary production.At present, the coal bed gas well wellhead assembly of field by using is of a great variety, structure is had nothing in common with each other, but can be divided into two types according to purposes: fracture well head device and mining coal seam gas well mouth device, coal bed gas are produced the wellhead assembly that adopts and are just had single water filling or degassing function.When carrying out on-the-spot water pumping gas production operation, the general deep-well drainage plant that adopts is discharged ground with the coal-water mixture in the coal bed gas well by conduit, enter eliminator, contained a small amount of coal bed gas is separated in the water, and a large amount of coal bed gas mainly is to produce from sleeve pipe, replacing degassing function and drain function by water-filling function as required needs dismounting and erection equipment repeatedly, has brought inconvenience to construction, has increased the labour intensity of operating worker.

The utility model content

In order to solve the prior art deficiency, the purpose of this utility model is to provide a kind of coal bed gas well array coal water water filling exhaust wellhead assembly, this utility model can be arranged coal water, water filling and exhaust simultaneously, the row's of realization exhaust integratedization of coal water water filling, and moisture content of coal is from the isolated water reusable edible of device, this utility model is simple and compact for structure, and is easy for installation.

The purpose of this utility model can realize by following technique measures:

The utility model is a kind of coal bed gas well array coal water water filling exhaust wellhead assembly, is made up of from device, big syphon, row's coal water valve, middle flange, draining valve, big flange, casing flange, filling pipe, water injection valve, four-way, one way valve, little flange, outlet pipe, strainer, little bend pipe, air outlet valve, bolt upper body, moisture content of coal; Described upper body is fastenedly connected by bolt and casing flange, big flange, middle flange, little flange, air outlet valve is fixed on above the upper body, moisture content of coal is fixedly installed togather with big flange and middle flange respectively from device and row's coal water valve, row's coal water valve, moisture content of coal passes through middle flange respectively from device and one way valve, big flange, little flange and upper body are fastenedly connected, the big syphon head and the tail are connected with the mixture inlet of moisture content of coal from device with row's coal water valve respectively, the upper end of little flange is installed with one way valve, the bottom and the one way valve of four-way are fixed together, the left end of four-way is equipped with the draining valve that is connected with outfall, all the other ends of four-way are equipped with the draining valve that is connected with filling pipe, the lower end and the air outlet valve of little bend pipe are installed together, and the upper end of little bend pipe is equipped with the strainer of fixedlying connected with outlet pipe; Be provided with three independent pipelines in the upper body, the row's of being respectively coal water lines, water injecting pipeline and outlet pipe, water injecting pipeline carries out the waterflood flush coal body, and outlet pipe is discharged the coal bed gas that appear the down-hole, and row's coal water lines is discharged the down-hole coal-water mixture; Moisture content of coal can write down and show the pressure parameter of moisture content of coal in device from the pressure meter on the device; Medium (water, gas) the adverse current phenomenon that one way valve can avoid borehole pressure to raise and cause; After each parts connect fastening finishing, realize water filling and go out airway dysfunction by water filling and the control valve of giving vent to anger, the deep-well dewatering installation drains into moisture content of coal from device with coal-water mixture by conduit, isolate coal bed gas and coal grain impurity and discharge through exhaust opening and sewage draining exit, isolated water can inject into well recycling.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model;

Be labeled as among the figure: A: the upper body; 1: pressure meter; 2: moisture content of coal is from device; 3: mixture inlet; 4: big syphon; 5: row's coal water valve; 6: middle flange; 7: row's coal water lines; 8: conduit; 9: outlet valve; 10: exhaust opening; 11: draining valve; 12: outfall; 13: blowoff valve; 14: sewage draining exit; 15: big flange; 16: casing flange; 17: filling pipe; 18: water injection valve; 19: four-way; 20: one way valve; 21: little flange; 22: water injecting pipeline; 23: outlet pipe; 24: strainer; 25: little bend pipe; 26: air outlet valve; 27: outlet pipe; 28: bolt.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model specifically is described below:

At first, as shown in Figure 1, should be earlier that casing flange 16 is fastening with bolt 28 with upper body A when a kind of coal bed gas well array coal water water filling exhaust wellhead assembly of the present utility model is assembled, afterwards with big flange 15, middle flange 6, little flange 21, air outlet valve 26 is fixed on above the A of upper body, moisture content of coal is fixedly installed togather with big flange 15 and middle flange 6 respectively from device 2 and row's coal water valve 5, be connected fastening with moisture content of coal from the mixture inlet 3 of device 2 with row's coal water valve 5 big syphon 4 head and the tail respectively again, and sealed, in addition, the upper end of little flange 21 is installed with one way valve 20, the bottom and the one way valve 20 of four-way 19 are fixed together, the left end of four-way 19 is equipped with the draining valve 11 that is connected with outfall 12, all the other ends of four-way 19 are equipped with the draining valve 18 that is connected with filling pipe 17, then, the lower end and the air outlet valve 26 of little bend pipe 25 is installed together, the upper end of little bend pipe 25 is equipped with the strainer 24 of fixedlying connected with outlet pipe 23, check peripheral space at last, prevent seepage; Be provided with three independent pipelines in the A of upper body, the row's of being respectively coal water lines 7, water injecting pipeline 22 and outlet pipe 27, water injecting pipeline 22 carries out the waterflood flush coal body, and outlet pipe 27 is discharged the coal bed gas that appear the down-hole, and row's coal water lines 7 is discharged the down-hole coal-water mixture; Moisture content of coal can write down and show the pressure parameter of moisture content of coal in device 2 from the pressure meter 1 on the device 2; One way valve 20 can be controlled water filling, prevents medium (water, gas) the adverse current phenomenon that borehole pressure raises and causes, and avoids blast to wait fortuitous event to take place; The strainer 24 that is connected with outlet pipe 23 also has the function of dry gas except filtering out the solid impurities such as coal dust in the coal bed gas, closes the valve 26 of giving vent to anger, and strainer 24 changes conveniently.

Coal bed gas well array coal water water filling exhaust wellhead assembly after the assembling is when carrying out operation, at first open water injection valve 18, water is injected at 17 places continuously at filling pipe, water enters the down-hole through water injecting pipeline 22, down-hole coal bedly be subjected to current scour, permeability strengthens, the coal bed gas gas output increases, the row's of opening coal water valve 5 then, the deep-well dewatering installation drains into coal water lines 7 with the conduit 8 of coal-water mixture bottom the A of upper body, enter moisture content of coal afterwards from device 2, coal-water mixture carries out separating and filtering at moisture content of coal in device 2, open outlet valve 9 and blowoff valve 13, isolated coal bed gas and coal grain impurity are discharged from exhaust opening 10 and sewage draining exit 14 respectively, open draining valve 11, it is recycling that isolated water can inject four-way 19, simultaneously, control the valve 26 of giving vent to anger, the coal bed gas that the down-hole is appeared enters outlet pipe 27, after filtering through filter 24 then, from the discharge of outlet pipe 23 continous-stables.

At last, the utility model improves original wellhead assembly, it is integrated to arrange coal water, exhaust, water-filling function, and moisture content of coal is from the isolated water reusable edible of device, and this utility model is simple and compact for structure, and is easy for installation, in addition, this utility model adopts the potted component of stainless steel material and rubber material, can be high pressure resistant, have the better seal effect.

Claims (1)

1. a coal bed gas well array coal water water filling exhaust wellhead assembly is made up of from device (2), big syphon (4), row's coal water valve (5), middle flange (6), draining valve (11), big flange (15), casing flange (16), filling pipe (17), water injection valve (18), four-way (19), one way valve (20), little flange (21), outlet pipe (23), strainer (24), little bend pipe (25), air outlet valve (26), bolt (28) upper body (A), moisture content of coal; Upper body (A) is fastenedly connected by bolt (28) and casing flange (16), big flange (15), middle flange (6), little flange (21), air outlet valve (26) is fixed on above the upper body (A), moisture content of coal is fixedly installed togather with big flange (15) and middle flange (6) respectively from device (2) and row's coal water valve (5), row's coal water valve (5), moisture content of coal passes through middle flange (6) respectively from device (2) and one way valve (20), big flange (15), little flange (21) is fastenedly connected with upper body (A), big syphon (4) head and the tail are connected with the mixture inlet (3) of moisture content of coal from device (2) with row's coal water valve (5) respectively, the upper end of little flange (21) is installed with one way valve (20), the bottom of four-way (19) and one way valve (20) are fixed together, the left end of four-way (19) is equipped with the draining valve (11) that is connected with outfall (12), all the other ends of four-way (19) are equipped with the draining valve (18) that is connected with filling pipe (17), the lower end of little bend pipe (25) and air outlet valve (26) are installed together, and the upper end of little bend pipe (25) is equipped with the strainer (24) of fixedlying connected with outlet pipe (23); It is characterized in that: be provided with three independent pipelines in upper body (A), the row's of being respectively coal water lines (7), water injecting pipeline (22) and outlet pipe (27).

Images