Bottom hole well strainer
First Claim
1. A well strainer for extracting fluids from a well and filtering solid particles from the fluids during extraction comprising:
- a cylindrical stack of annular filter segments joined together in superimposed relation along a common longitudinal axis by a plurality of threaded rods with locking means at each end of said rods,each of said filter segments having a plurality of adjustable spacing means for providing at least two selectable filter spacings between adjacent filter segments,each of said adjustable spacing means including an arcuate, elongate slot for receiving one of said threaded rods, sloped contact means for contacting an adjacent filter segment and defining the filter spacing therebetween, and locator means for indicating the selected one of at least two selectable filter spacings.
0 Assignments
0 Petitions
Accused Products
Abstract
A well strainer is provided which includes a plurality of stacked, annular, filter segments with each segment including a plurality of elongate, arcuate, threaded rod receiving slots, ramped bearing surfaces near each slot, and position indicators in the vicinity of the ramped bearing surfaces and slots. The gap between adjacent annular filter segments is selected by rotating one segment relative to another to a desired position whereat indicator points are received within respective indicator sockets. Guide members adjacent the ramped bearing surfaces help to keep adjacent filter segments in true superimposed relation. Once the well strainer has been assembled by stacking each of the annular filter segments, one on top of the other in superimposed relation along a common longitudinal axis and securing the stack together by a plurality of threaded rods which extend along the length of the stack, adjustments in the gaps between adjacent filter segments can be made by simply loosening the nuts at one end of the stack to allow the indicator points of one segment to be lifted out of the indicator sockets of an adjacent segment and to relieve the bearing pressure between adjacent segments so that one segment can be rotated relative to another. There is no need to completely disassemble the well strainer in order to adjust the gap between adjacent filter segments.
-
Citations
20 Claims
-
1. A well strainer for extracting fluids from a well and filtering solid particles from the fluids during extraction comprising:
-
a cylindrical stack of annular filter segments joined together in superimposed relation along a common longitudinal axis by a plurality of threaded rods with locking means at each end of said rods, each of said filter segments having a plurality of adjustable spacing means for providing at least two selectable filter spacings between adjacent filter segments, each of said adjustable spacing means including an arcuate, elongate slot for receiving one of said threaded rods, sloped contact means for contacting an adjacent filter segment and defining the filter spacing therebetween, and locator means for indicating the selected one of at least two selectable filter spacings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An annular filter segment for use in a well strainer comprising:
-
a ring shaped body having upper and lower surfaces, inner and outer edges, and a cross-section which is thick near the outer edge and tapers downwardly toward the inner edge, a plurality of circumferentially spaced, arcuate, elongate slots each adapted for receiving a threaded rod, a plurality of circumferentially spaced pairs of contact wedges projecting from one of the upper and lower surfaces of said filter segment, and a plurality of circumferentially spaced pairs of wedge seats projecting from the other of said upper and lower filter segment surfaces. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. In a well strainer composed of a stack of superimposed, annular, filter segments joined together by a plurality of threaded rods, the improvement comprising:
each segment having a plurality of circumferentially spaced, elongate, arcuate, threaded rod receiving openings providing for rotational adjustment of adjacent filter segments about a common longitudinal axis.
Specification