Abstract: A drilling rig includes a base section, a first section, a second section, a third section and a fourth section. For the base section upper region, a fixed pulley block and a guide pulley are installed. Except for the fourth section-crown block section, each section lower region is installed with a lifting lug for a movable pulley block installation for substantially vertical lifting. The crown block section is installed substantially vertical; the subsequent section is located substantially horizontal with the section front pillar upper region connecting to the previous section front pillar lower region. The previous section is substantially vertical lifted to draw the next section skidding into the base section and lifting substantially vertical with the previous section pillar lower region connected to the next section pillar upper region.

Abstract: A method and an apparatus for identifying a request are disclosed. The method is applied in a target server. The method includes: determining whether associated information corresponding to first request information sent by a resource distribution server exists when receiving the first request information, wherein the first request information is determined by the resource distribution server based on a first resource request from a terminal; determining a request identification result based on the associated information and the first request information when the associated information exists; and returning the request identification result to the resource distribution server to cause the resource distribution server to perform an operation corresponding to the request identification result.

Abstract: A drilling rig includes a base section, a first section, a second section, a third section and a fourth section. For the base section upper region, a fixed pulley block and a guide pulley are installed. Except for the fourth section-crown block section, each section lower region is installed with a lifting lug for a movable pulley block installation for substantially vertical lifting. The crown block section is installed substantially vertical; the subsequent section is located substantially horizontal with the section front pillar upper region connecting to the previous section front pillar lower region. The previous section is substantially vertical lifted to draw the next section skidding into the base section and lifting substantially vertical with the previous section pillar lower region connected to the next section pillar upper region. Dismount the movable pulley block from the previous section and installed the movable pulley block with the adjacent section lifting lug.

Abstract: Methods and apparatuses for PW redundancy have been provided. A network node across a first domain and a second domain is disclosed. In each domain, the network node and at least one second network node form a first redundancy group (RG) in the first domain and a second RG in the second domain. The network node comprises a first set of interfaces facing the first domain, a second set of interfaces facing the second domain, and a forwarder. In the first set, at least a first and a second interfaces are configured for connecting with PW segments within the first domain; in the second set, at least a first and a second interfaces are configured for connecting with PW segments within the second domain. A third interface in the first set and a third interface in the second set are configured for transferring traffic between the network node and the at least one second network node and between the first domain and the second domain.

Abstract: Methods and apparatuses for PW redundancy have been provided. A network node across a first domain and a second domain is disclosed. In each domain, the network node and at least one second network node form a first redundancy group (RG) in the first domain and a second RG in the second domain. The network node comprises a first set of interfaces facing the first domain, a second set of interfaces facing the second domain, and a forwarder. In the first set, at least a first and a second interfaces are configured for connecting with PW segments within the first domain; in the second set, at least a first and a second interfaces are configured for connecting with PW segments within the second domain. A third interface in the first set and a third interface in the second set are configured for transferring traffic between the network node and the at least one second network node and between the first domain and the second domain.