| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: device is made with possible use in conjunction with scraper for removal of paraffin precipitations. Device includes end piece for connection to well device and metallic rod with variable cross-section. Rod is made in form of at least three serially placed truncated cones. Cones have double relation of greater diameter to lesser diameter. ^ EFFECT: higher efficiency. ^ 4 cl, 2 dwg |
