What gas anchors could be supplied from our end?

We have s31-2 spiral gas anchor, gravity gas anchor and hydraulic anchor, etc.
S31-2 spiral gas anchor, is used in oil suction well with high gas-oil ratio to decrease the effect of gas on pump efficiency.
The gravity gas anchor is to separate the gas and liquid through the principle of the gravity centrifugalization.
Hydraulic anchor is mainly used for fixing the downhole tubular during the stratum injection and fracture process and preventing against the construction failure caused by the failure of packer after the bending or movement of the string with high pressure in the lower part of the packer. With high ability of pressure-bearing, it can meet the need of deep well fracture.