A debris collection tool includes a mandrel having a longitudinal flowbore therethrough and an inner sleeve disposed around the mandrel. A first array of magnets is arranged on the inner sleeve. A second array of magnets is disposed around the inner sleeve. The first array of magnets is moveable with respect to the second array of magnets. The debris collection tool further includes an adaptor sleeve concentric with the mandrel and a linkage coupling the adaptor sleeve with the inner sleeve.

A first sand accumulator may include a housing and an insert within the housing. The insert includes axially aligned outer and inner sleeves. In a first position, the outer and inner sleeves both have large flow ports that align to form a continuous flow path for fluid to flow through the sand accumulator such that a vortex flow forms in the sand accumulator. A second sand accumulator may include a housing disposed in line with a wellbore tubular and an insert disposed inside the housing such that insert forms a continuous end-to-end seal with a section of the wellbore tubular. An inlet section of the insert has an inlet port configured to permit fluid flow such that a vortex flow forms in the inlet section. A method of using a sand accumulator includes introducing process fluid entrained with sand to the sand accumulator.

A first sand accumulator may include a housing and an insert within the housing. The insert includes axially aligned outer and inner sleeves. In a first position, the outer and inner sleeves both have large flow ports that align to form a continuous flow path for fluid to flow through the sand accumulator such that a vortex flow forms in the sand accumulator. A second sand accumulator may include a housing disposed in line with a wellbore tubular and an insert disposed inside the housing such that insert forms a continuous end-to-end seal with a section of the wellbore tubular. An inlet section of the insert has an inlet port configured to permit fluid flow such that a vortex flow forms in the inlet section. A method of using a sand accumulator includes introducing process fluid entrained with sand to the sand accumulator.

This disclosure provides a downhole debris removal apparatus, a method for assembling a downhole debris removal apparatus, and a well system including the same. The downhole debris removal apparatus, in one aspect, includes a crossover sub, the crossover sub having a first sub end with one of a sub pin thread or sub box thread, a second sub end with the other of the sub box thread or sub pin thread, and a fluid passageway extending from the first sub end to the second sub end. The downhole debris removal apparatus, according to this aspect, further includes a debris removal tube having a first tube end and a second tube end, the first tube end removably engaged with the crossover sub between the first sub end and the second end.

This disclosure provides a downhole debris removal apparatus, a method for assembling a downhole debris removal apparatus, and a well system including the same. The downhole debris removal apparatus, in one aspect, includes a crossover sub, the crossover sub having a first sub end with one of a sub pin thread or sub box thread, a second sub end with the other of the sub box thread or sub pin thread, and a fluid passageway extending from the first sub end to the second sub end. The downhole debris removal apparatus, according to this aspect, further includes a debris removal tube having a first tube end and a second tube end, the first tube end removably engaged with the crossover sub between the first sub end and the second end.

A downhole catcher device comprises a catching mechanism which is configured to be transferable between a first mode and a second mode. The catching mechanism is further configured for passing by a first operation element if the catching mechanism is in the first mode and for catching a second operation element if the catching mechanism is in the second mode. The transfer between the first and the second mode is triggered (or effected) by a downhole tool which is operated by the second operation element.

A downhole catcher device comprises a catching mechanism which is configured to be transferable between a first mode and a second mode. The catching mechanism is further configured for passing by a first operation element if the catching mechanism is in the first mode and for catching a second operation element if the catching mechanism is in the second mode. The transfer between the first and the second mode is triggered (or effected) by a downhole tool which is operated by the second operation element.

A scale sampler plunger having an upper end and a downhole end for a plunger lift system in a tubing string comprising: a solid cylindrical member at the upper end of the scale sampler plunger configured to remove a plurality of contaminants in the tubing string; a lower sub at the downhole end of the scale sampler plunger threaded to the solid cylindrical member, wherein the lower sub comprises a first section threaded to a second section extending axially from the first section; wherein a fluid stream carrying solids flows from the tubing string into an entry opening located in the second section; a deflector disposed in a chamber in the lower sub, wherein the deflector causes the fluid stream carrying solids to deposit the solids in the chamber in the lower sub; and an anchor disposed in the entry opening, wherein the anchor is fastened to the deflector.

A scale sampler plunger having an upper end and a downhole end for a plunger lift system in a tubing string comprising: a solid cylindrical member at the upper end of the scale sampler plunger configured to remove a plurality of contaminants in the tubing string; a lower sub at the downhole end of the scale sampler plunger threaded to the solid cylindrical member, wherein the lower sub comprises a first section threaded to a second section extending axially from the first section; wherein a fluid stream carrying solids flows from the tubing string into an entry opening located in the second section; a deflector disposed in a chamber in the lower sub, wherein the deflector causes the fluid stream carrying solids to deposit the solids in the chamber in the lower sub; and an anchor disposed in the entry opening, wherein the anchor is fastened to the deflector.

A magnet assembly for a debris collection tool includes first and second annular end bands, between which is disposed an annular arrangement of magnets. The magnet assembly includes a plurality of bridges, each bridge disposed between the first and second annular end bands and between circumferentially adjacent magnets of the annular arrangement of magnets. The first and second annular end bands are substantially of a non-magnetic material, and the bridges are substantially of a magnetic material.