Gas Drainage Hole Packer

Gas drainage hole packer has all the functions of water injection hole packer, such as water injection, reducing gas content, improving coal humidity and preventing explosion accident. Besides, it can let out the gas. It is composed of four parts: high pressure inflation rubber hose, steel tube, sliding seal joint and pressure injection joint. And it can be used repeatedly for 30 - 50 times.

The function of gas drainage hole packer:

·        It can inject water into the coal bed which can release some gas. So it can reduce the gas content effectively.

·        The dust can be reduced by 80% if the water-flooding effect is good. So it can improve the workers' operation conditions greatly and prevent the dust explosion accident effectively.

·        The water can humidify the coal bed, which can prevent the auto-ignition of the coal.

·        It has good outburst prevention effect, and it can release stress and gas stress. So it can prevent unexpected accidents in coal cutting effectively.

·        It solves the gas overrun in the coal cutting and outburst prevention drilling process, which can prevent the outburst and explosion of coal and gas effectively.

The details of gas drainage hole packer:

· Structure: gas drainage hole packer is composed of four parts: high pressure inflation rubber hose, steel tube, sliding seal joint and pressure injection joint. And the high pressure inflation rubber hose is made from high quality NR synthetic rubber, which is resistant to abrasion, weather, ozone and high pressure.

· Sealing hole diameter: 25 mm - 155 mm.

· Working pressure: 1 MPa - 6 MPa.

· Safety value opening pressure: 0.4 MPa - 0.5 MPa.

· Working flow: it can inject water 5 t - 8 t per hour, and the gas drainage volume depends on the concentration and pressure.

· Sealing hole depth: 0.5 m - 3 m.

· Hose inflation coefficient: 60% - 100%.

· Inflatable area: 24 mm - 160 mm.

· Inner diameter: 10 mm - 102 mm.

· Outside diameter: 24 mm - 128 mm.

· Test pressure: 6 MPa - 30 MPa.

· Burst pressure: 12 MPa - 40 MPa.

specification	ID	OD	Sealing aperture	Inflatable area	Max pressure	Test pressure	Burst pressure
	mm	mm	mm	mm	Mpa	Mpa	Mpa
φ10 - 2	10 ± 0.5	24 ± 1.5	25-35	25-48	10	18	36
φ16 - 2	16 ± 0.5	30 ± 1.5	35-45	30-50	8	16	32
φ16 - 4	16 ± 0.5	36 ± 1.5	35-45	36-50	20	30	40
φ19 - 2	19 ± 0.5	36 ± 1.5	40-50	36-60	8	16	32
φ19 - 4	19 ± 0.5	40 ± 2.0	40-50	40-60	20	30	40
φ22 - 2	22 ± 0.5	39 ± 2.0	45-55	39-80	6	12	24
φ22 - 4	22 ± 0.5	45 ± 2.0	45-55	45-80	20	30	40
φ25 - 2	25 ± 0.5	33 ± 2.0	50 - 60	33-85	6	12	24
φ25 - 4	25 ± 0.5	48 ± 2.0	50-60	48-85	16	30	40
φ32 - 2	32 ± 0.5	50 ± 2.0	55-65	50-90	6	12	24
φ32 - 4	32 ± 0.5	50 ± 2.0	55-65	50-90	16	24	32
φ38 - 2	38 ± 0.5	55 ± 2.0	60 - 70	55 - 95	5	10	20
φ38 - 4	38 ± 0.5	60 ± 2.0	60 - 70	60-95	16	24	32
φ45 - 2	45 ± 0.5	63 ± 2.0	70 - 80	63-100	4	8	16
φ45 - 4	45 ± 0.5	69 ± 2.0	70 - 80	69-100	16	24	32
φ51 - 2	51 ± 0.5	69 ± 2.0	85 - 95	69-110	4	8	16
φ51 - 4	51 ± 0.5	75 ± 2.0	85 - 95	75-110	16	24	32
φ64 - 2	64 ± 0.5	84 ± 2.0	95 - 105	84-120	3	6	12
φ64 - 4	64 ± 0.5	90 ± 2.0	95 - 105	90-120	8	12	16
φ76 - 2	76 ± 0.5	94 ± 2.0	105 - 115	90-130	3	6	12
φ76 - 4	76 ± 0.5	99 ± 2.0	105 - 115	94-130	3	6	12
φ89 - 2	89 ± 0.5	109 ± 2.0	125 - 135	109-140	8	12	16
φ89 - 4	89 ± 0.5	115 ± 2.0	125 - 135	115-140	8	10	18
φ102 - 2	102 ± 0.5	122 ± 2.0	145 - 155	122-160	3	6	12
φ102 - 4	102 ± 0.5	128 ± 2.0	145 - 155	128-160	6	10	16

Application of gas drainage hole packer:

·        Gas drainage hole packer is used to inject water into coal bed, which can reduce the gas content and dust.

·        It is used to let out gas.