摘要:
A casing brush for cleaning the walls of a well casing, the casing brush comprising a body (1) in which are mounted cleaning bristles (2) and an adapter (4) to connect the upper end of the body (1) to the lower end of a bridge plug. The body (1) and the adapter (4) are comprised of a material which is at least drillable by a rock bit.
摘要:
Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes that treat resins. A composition containing a polyamine-epihalohydrin resin which includes CPD-forming species can be treated with at least one agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 2 weeks at 50° C., and a pH of about 2.5 to 3.5 contains less than about 250 ppm dry basis of CPD. The invention is also directed to a gelation storage stable reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin, when stored at pH 1 for 24 hours at 50° C. and measured at 24 hours, produces less than about 1000 ppm dry basis of CPD. A paper product containing the storage stable polyaminopolyamide-epihalohydrin resin, when corrected for adding at about a 1 wt % addition level of the polyaminopolyamide-epihalohydrin resin, contains less than about 250 ppb of CPD. Moreover, a resin can be prepared starting from a prepolymer having a low acid number or low concentration of acid end groups. The invention is also directed to papers containing the resins.
摘要:
An insect capturing device including a head having bristles which are arranged in concentric rings. A handle has a trigger which allows a user to move the bristles between a diverged position and a converged position in which an insect is entrapped without being injured. The device may then be carried outdoors and the bristles again moved to the diverged position so that the insect is released harmlessly.
摘要:
The mechanical oar system is a manually powered propulsion system for a vessel. The vessel is a personal watercraft. The mechanical oar system is configured for use with a person. The mechanical oar system is powered by the person. The mechanical oar system comprises a plurality of drive mechanisms and a vessel. The plurality of drive mechanisms are integrated into the vessel. Each of the plurality of drive mechanisms is manually powered. Each of the plurality of drive mechanisms comprises a mechanism that moves an oar structure (referred to in this disclosure as a blade). The oar structure propels the vessel in a desired direction. Each of the plurality of drive mechanisms is oriented relative to the vessel such that the direction of the propulsive forces can be adjusted by the person.
摘要:
The present invention relates to a process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidising agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener.
摘要:
A disposal device is used for disposal for messy dirt such as dog excrement. The device provides a disposal action analogous to that of a dustpan and brush. A scooper is pushed underneath the dirt on the near side, while a scraper pushes the dirt towards the scooper. The dirt falls into the interior of the bag via a chute connecting the scooper to a wall of the bag. The scooper and the scraper are dropped into the bag and the bag is then sealed by a seal.
摘要:
An apparatus comprises an integrated circuit and an open connection detection circuit within the integrated circuit. The integrated circuit includes a plurality of inputs for connecting with a plurality of outputs of a multi-cell battery pack. The open connection detection circuit within the integrated circuit detects an open connection on at least one of the plurality of inputs from the multi-cell battery and generates a fault condition responsive thereto.
摘要:
The present invention relates to a process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidising agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener.
摘要:
A casing scraper comprises a generally cylindrical body (1) adapted for connection at one end to a drill string, having a plurality of scraping or scouring elements (2) disposed around the outer surface thereof. A pipe (6) extends through the cylindrical body (1). One end of the pipe (6) is adapted for connection to a source of cleaning fluid and the other end is connected to a tail pipe (7). The tail pipe (7) has at least one opening (8) in it through which cleaning fluid may be circulated into the well casing. The casing scraper further comprises filtration structure (4) located above the openings (8) in the tail pipe (7) and remotely operable structure (9, 10) for selectively directing the flow of cleaning fluid from passing outside the filtration structure (4) to passing through the filtration structure (4).
摘要:
A well cleaning tool adapted for connection to a drill string for removing debris and residues from the inner wall of a well casing, comprises an elongate generally cylindrical member (1) having a plurality of scratching elements (2) in the outer surface thereof. First and second helical channels or grooves (3 and 4) are defined in the outer surface of the cylindrical member (1) between the scratching elements (2), the second helical channel or groove (4) running in the counter direction to the first helical channel or groove (3).