Pipeline pig
OwnerOrlande Sivacoeinventor
Life of this patent
Estimating the term…
Abstract
A pipeline pig has hollow flared ends and a central portion of smaller radial dimension than adjacent parts of the pig. Detachable appendages extend radially outward from the pig in circumferential rows. At least one row of appendages is in the central portion and the appendages extend radially outward less than the other rows of appendages. The appendages are threaded into sleeves having anchored bases. The row of appendages that extends radially outward by a smaller amount than the other appendages is subjected to reduced wear, but when the pig encounters resistance, the central part of the pig extends outward bringing the appendages into contact with the interior of the pipeline.
Claims19
A pipeline pig comprising:
- a generally cylindrical body made of elastic material and having first and second ends and a central portion;
- a plurality of appendages disposed about and extending radially outward from the central portion of the body;
- the central portion of the body having a portion with reduced radius, and a portion not having reduced radius, appendages being disposed about and extending radially from both portions, such that appendages in the portion with reduced radius extend radially outward less than appendages in the portion of the body not having reduced radius.
A pipeline pig comprising:
- a generally cylindrical body made of elastic material and having first and second ends and a central portion;
- a plurality of appendages disposed about and extending radially outward from the body;
- and
- means to extend the appendages radially outward to different heights in relation to the body.
A detachable appendage assembly in combination with a cylindrical pipeline pig having a central portion, the detachable appendage being attached to the central portion of the pipeline pig, for use in scraping scale from the inside of pipelines, the detachable appendage assembly comprising:
- a detachable appendage having a shank portion and a head portion;
- a sleeve secured in the central portion of the pig and having means to prevent the sleeve from being removed from the body of the pipeline pig, the sleeve being oriented radially in relation to the pipeline pig;
- and
- the detachable appendage and the sleeve each having means cooperating with each other to detachably secure the detachable appendage within the sleeve.
Dependencies are inferred from the claim text.