Abstract: A horizontal well completion tubing string capable of achieving sublevel mining comprises a production casing. A horizontal section of the production casing is connected to two primary screen pipes. A pumping pipe is fixed in a vertical section of the production casing via a packer. A horizontal section of the pumping pipe extends freely in a horizontal well section constituted of the two primary screen pipes and the casing. A secondary screen pipe is disposed on the horizontal section of the pumping pipe. Meshes of the secondary screen pipe each comprises a reduced section, a straight section and an impact section, wherein an inner diameter of the reduced section is reduced outwardly along the radial direction of the secondary screen pipe, and an inner diameter of the impact section is reduced outwardly along the radial direction of the secondary screen pipe.

Abstract: A hydraulic adapter for installing connecting flanges of an oil pipe comprises a first centralizer, a second centralizer, and a hydraulic cylinder. Tapered cylinders are disposed on the first centralizer. A first flange centralizing protrusion is disposed on the first centralizer. A hydraulic cylinder installation hole is disposed on the first centralizer between two of the tapered cylinders. Tapered protrusions are disposed on the second centralizer and fit with the tapered cylinders disposed on the first centralizer. An adjustment hole is disposed on the second centralizer. A second flange centralizing protrusion is disposed on the second centralizer. A base of the hydraulic cylinder is disposed on an outer side of the first centralizer, and a hydraulic arm of the hydraulic cylinder perforates through the hydraulic cylinder installation hole and the adjustment hole. An extrusion block is disposed at an end of the hydraulic arm.

Abstract: A screen pipe, comprises a base pipe with a plurality of oil inlet holes arranged on an outer wall of the base pipe; wherein the screen pipe comprises: a plurality of reinforcing ribs are disposed on an outer circumference wall of the base pipe along an axial direction of the base pipe; a wrap wire is winded at intervals on the plurality of reinforcing ribs along a circumferential direction of the base pipe; and a triangular block shaped foam iron is filled in a space between two adjacent reinforcing ribs of the plurality of reinforcing ribs. When the present invention is in use, the thick oil enters into the gap between the wrap wire and the drive pipe through the wrap wire gap. After filtration by the foam iron, the thick oil enters into the base pipe through the inlet hole, realizing pumping and transportation of the oil.

Abstract: A horizontal well completion tubing string capable of achieving sublevel mining comprises a production casing. A horizontal section of the production casing is connected to two primary screen pipes. A pumping pipe is fixed in a vertical section of the production casing via a packer. A horizontal section of the pumping pipe extends freely in a horizontal well section constituted of the two primary screen pipes and the casing. A secondary screen pipe is disposed on the horizontal section of the pumping pipe. Meshes of the secondary screen pipe each comprises a reduced section, a straight section and an impact section, wherein an inner diameter of the reduced section is reduced outwardly along the radial direction of the secondary screen pipe, and an inner diameter of the impact section is reduced outwardly along the radial direction of the secondary screen pipe.

Abstract: In one embodiment, a method includes: facilitating an online conference session between a plurality of client devices connected to a meeting server; storing information related to one or more backup client devices, the one or more backup client devices corresponding to client devices that accepted to share their computing resources, and the information comprising, for each of the one or more backup client devices a network address and an amount of available computing resources; receiving, from a client device connected to the meeting server, a request to identify a backup client device operative to process data in place of the client device; and, in response to the request, using the stored information to identify at least one backup client device from the one or more backup client devices, the at least one backup client device having sufficient computing resources available to process the data.

Abstract: Techniques are presented to enable a meeting participant/attendee at an endpoint device in an online/web-based meeting/conference to navigate content of a presentation made by a presenter without disrupting the flow of the presentation made by the presenter. At the endpoint of a meeting attendee, data is stored representing content as it is being presented by a presenter at a presenter endpoint device. A command is received from an attendee at the attendee endpoint device to display previously presented content of the presentation. The attendee endpoint device retrieves data for the previously presented content from the stored data. During the presentation (but without disrupting the presenter's presentation of the content), the attendee endpoint device displays the previously presented content from the retrieved data.