An apparatus to make a custom length pipe nipple, and method for use of the apparatus. The apparatus has a male plumbing thread at one end connected to an elongate member, with length or measurement markings along the elongate member. The apparatus is threaded into a plumbing fixture that will be flush mounted against a wall, and then using the markings on the elongate member, a length is determined that corresponds to the flush mounting surface of the plumbing fixture. The apparatus is then threaded into a plumbing fitting, such as a drop ear elbow inside a wall, and a second length is determined that corresponds to a flush mounting surface of the wall. The two lengths are added together to determine the length of a piece of pipe. Tightening and/or caulk allowance may be included, and a piece of copper or iron pipe is then cut to length. For copper pipe, a threaded male copper fitting is solder attached to each end. For iron pipe, the ends are threaded. Depending on whether copper or iron pipe is used, there are different length or measurement markings along the elongate member.

An apparatus to make a custom length pipe nipple, and method for use of the apparatus. The apparatus has a male plumbing thread at one end connected to an elongate member, with length or measurement markings along the elongate member. The apparatus is threaded into a plumbing fixture that will be flush mounted against a wall, and then using the markings on the elongate member, a length is determined that corresponds to the flush mounting surface of the plumbing fixture. The apparatus is then threaded into a plumbing fitting, such as a drop ear elbow inside a wall, and a second length is determined that corresponds to a flush mounting surface of the wall. The two lengths are added together to determine the length of a piece of pipe. Tightening and/or caulk allowance may be included, and a piece of copper or iron pipe is then cut to length. For copper pipe, a threaded male copper fitting is solder attached to each end. For iron pipe, the ends are threaded. Depending on whether copper or iron pipe is used, there are different length or measurement markings along the elongate member.

A system of visual and non-visual marks for PVC pipes and couplings which allows users to group PVC pipes and couplings by type, size, and composition with a series of colors, shapes, swirls, patterns. The series of colors, shapes, swirls, patterns are applied to the PVC pipes and couplings by etching, painting, applying stickers, and or molding into the PVC itself. The non-visual mark utilize the magnetic and radio reflective nature of the marks to allow remote identification of the plumbing pipes and couplings after being buried.

A system of visual and non-visual marks for PVC pipes and couplings which allows users to group PVC pipes and couplings by type, size, and composition with a series of colors, shapes, swirls, patterns. The series of colors, shapes, swirls, patterns are applied to the PVC pipes and couplings by etching, painting, applying stickers, and or molding into the PVC itself. The non-visual mark utilize the magnetic and radio reflective nature of the marks to allow remote identification of the plumbing pipes and couplings after being buried.

A pipe or fitting having a polymer liner and a replaceable component including an outer ring having an outside diameter matching the inside diameter of the pipe or fitting, a polymer liner bonded to the outer ring and having an inside diameter matching the inside diameter of the liner of the pipe or fitting. The replaceable component is disposed in an inlet or outlet of the pipe or fitting so as to form a continuous bore lined with a polymer.

Systems and methods for securing a remotely operated vehicle (ROV) to a subsea structure during cleaning, maintenance, or inspection of the structure surface are provided. In one or more embodiments, an attachment mechanism includes a pair of grasping hooks that are raised and lowered when driven by a motorized drive. In one or more embodiments, an attachment mechanism includes a rigid holder having a mechanical stop and connected to a swing arm, the swing arm configured to rotate inward, but not outward beyond the mechanical stop. In one or more embodiments, an attachment mechanism includes a plurality of linked segments in series, each connected at a plurality of pivot points. A pair of wires passes through the plurality of linked segments and connects to a pair of pulleys that extend or retract the wires, thereby rotating the plurality of linked segments.

A pump system may include a blown-in dip tube connected to a valve body and having a connection which may include an improved blown-in dip tube connector having one or more of a lip for sealing with a blown-in dip tube, a seal ring configured to mate with a blown-in dip tube and seal therewith, a dip tube lock for mating with a blown-in dip tube, or an o-ring for providing an improved seal with a blown-in dip tube.

A two-part, selectively dockable robotic system having counterbalanced stabilization during performance of an operation on an underwater target structure is provided. The robotic system includes a first underwater robotic vehicle that is sized and shaped to at least partially surround the underwater target structure. A second underwater robotic vehicle is sized and shaped to at least partially surround the underwater target structure and selectively dock with the first underwater robotic vehicle. The first and second robotic vehicles include complimentary docking mechanisms that permit the vehicles to selectively couple to each other with the underwater target structure disposed at least partially therebetween. One robot includes a tool that can act upon the target structure and the other robot includes a stabilization module that can act upon the target structure in an opposite manner in order to counterbalance the force of the tool.

A compressive heat-resistant tube structure for RV includes a compressive heat-resistant multi-layer tube. The compressive heat-resistant multi-layer tube includes a compressive heat-resistant PVC soft inner tube, a polyester dense crocheted covering layer, and a compressive PVC soft outer tube. An outer surface of the compressive PVC soft outer tube is provided with an identification surface layer portion. The identification surface layer portion enables the user to easily and quickly identify each tube for connection of tubes. The soft compressive heat-resistant multi-layer tube can be bent according to the demand of use, not limited to the arrangement of the edge wiring. The soft compressive heat-resistant multi-layer tube is convenient for use and can be installed conveniently.

An apparatus and methods for installing and selectively retrieving a casing hanger locking device within a wellhead system during the bit run and retrieval operations are provided. An embodiment is an apparatus comprising: a bit sub comprising a tong neck, a cylindrical portion below the tong neck, and at least one stabilizing fin below the cylindrical section, wherein the at least one stabilizing fin comprises a keyway; a casing hanger locking device comprising an annular structure and an expandable ring disposed around an upper portion of the annular structure, the casing hanger locking device disposed around the bit sub; an actuation sleeve that engages with the casing hanger locking device; and a selective retrieval collar comprising a segmented retrieval ring, wherein the selective retrieval collar is attached to the bit sub, the actuation sleeve, and the casing hanger locking device.