Abstract: A spider for a downhole tool, comprises: an inner rim; an outer rim; and at least two spokes extending radially between and connected to the inner and outer rims. The spider can be selected from a group consisting of grounding spiders, landing spiders, and centralizers. The at least two spokes comprise a first spoke in a first row and a second spoke in a second row that is axially offset from the first row; the second spoke can be circumferentially offset from the first spoke. The second row can be at a drilling fluid inlet end of the spider, and the first row can be at a drilling fluid outlet end of the spider. Each row defines a transverse plane having a flow area that is sufficient for drilling fluid flowing through the spider to at least meet a minimum target flow rate under specified operating conditions.