118results about "Floating cables" patented technology

In one embodiment the invention comprises a particle velocity sensor that includes a housing with a geophone mounted in the housing. A fluid that substantially surrounds the geophone is included within the housing. The particle velocity sensor has an acoustic impedance within the range of about 750,000 Newton seconds per cubic meter (Ns/m<3>) to about 3,000,000 Newton seconds per cubic meter (Ns/m<3>). In another embodiment the invention comprises method of geophysical exploration in which a seismic signal is generated in a body of water and detected with a plurality of co-located particle velocity sensors and pressure gradient sensors positioned within a seismic cable. The output signal of either or both of the particle velocity sensors or the pressure gradient sensors is modified to substantially equalize the output signals from the particle velocity sensors and the pressure gradient sensors. The output signals from particle velocity sensors and pressure gradient sensors are then combined.

Various embodiments of an umbilical are provided. In one aspect, an umbilical is provided that includes a first tube, a second tube positioned in the first tube and a plurality of third tubes positioned in the first tube. Each of the plurality of third tubes has an inner polymer sleeve and an outer sleeve of carbon fibers in an epoxy matrix positioned around the polymer sleeve. The composite tubes yield a lighter umbilical that is easier to handle than a comparably sized conventional umbilical incorporating steel inner tubing and is more tolerant of dynamic bending and hydrostatic pressure loading.

An apparatus for making a marine seismic streamer includes a conveyor for transporting assembled mechanical harness from a storage device therefor to a storage device for storing completed marine streamer. The apparatus includes a first extruder for filling the harness with a void fill material and a second extruder for depositing jacketing material onto the filled harness both extruders being intermediate the two storage devices. A means for changing state of the void filling material is disposed proximate an outlet of the first extruder. In one embodiment, the means for changing state includes a radiation source.

A variable buoyancy cable is provided. In one aspect, the variable buoyancy cable includes a flexible sleeve that has an inner wall and an outer wall. A core is positioned in the sleeve and has a longitudinally disposed external channel with opposing first and second sidewalls. The channel and the inner wall of the flexible sleeve define a fluid passage for receiving a fluid to affect the buoyancy of the variable buoyancy cable. A slackened utility line is positioned in the channel and a fluid supply is coupled to the flexible sleeve and is operable to move fluid into and out of the fluid passage to selectively affect the buoyancy of the variable buoyancy cable. The core protects utility lines in the cable from damage due to ambient pressure and/or bending during deployment and retrieval. The buoyancy may be varied to suit various water conditions and mission requirements.

Described herein is a seismic streamer formed of sections including a main sheath covered with an external sheath, wherein said external sheath is formed using a thermoplastic material loaded with a biocide material.

A system comprises towed marine seismic equipment marine seismic equipment, adapted for towing through a body of water; and a coating of copper particles covering the marine seismic equipment to protect from marine growth. A method comprises towing marine seismic equipment having a coating of copper particles thereon to protect from marine growth.

The present invention relates to streamer cables. One embodiment of the present invention relates to a method for preparing a streamer cable. The method may comprise retrofitting the streamer cable with a solid void-filler material, where the streamer cable was configured as a liquid-filled streamer cable. The retrofitting may comprise introducing a void-filler material into the streamer cable when the void-filler material is in a liquid state and curing or otherwise solidifying the void-filler material to a solid state. In another embodiment, the present invention relates to a streamer cable comprising an outer skin and at least one sensor positioned within the outer skin. The streamer cable may also comprise a solid void-filler material positioned between the outer skin and the at least one sensor, wherein the solid void-filler material is coupled to the at least one sensor.

A bending-resistant highly-flexible floating cable comprises a wire core group, a winding package layer, a floating core group and an outer coating layer. Each wire core comprises a conductor and an insulating layer which coats the outside of the conductor. The insulating layer is made of the thermoplastic elastomer of the hydrogenated styrene-butadiene-styrene block copolymer. The winding package layer winds the outside of the wire core group. The floating core group coats the outside of the winding package layer, is a foaming layer and is made of the thermoplastic elastomer of the hydrogenated styrene-butadiene-styrene block copolymer. The outer coating layer coats the outside of the floating core group and is made of the modified thermoplastic polyurethane elastomer (TPU) or modified nylon. The invention also provides a manufacturing method, material formula and a preparation process of the cable. The floating cable has good bending endurance performance, good flexibility and small radius of bending curvature, is easy to operation and suitable for frequent bending and is frequently used by deploying and retracting.

The invention relates to a buoyancy controllable optoelectrical composite cable comprising a cable core and a sheath, wherein the sheath is sleeved outside the cable core, the cable core comprises a reinforcing core, more than one optic bundle tube and a power lead, wherein the optic bundle tubes are twisted around the reinforcing core and comprise a loose tube, optical fibers arranged in the loose tube and filling fiber paste. The buoyancy controllable optoelectrical composite cable is characterized in that more than one buoyancy control unit twisting layer is additionally arranged in the sheath, a buoyancy control unit is a physical foamed plastic filling rope or a hollow plastic tube, the reinforcing core is formed by covering a plastic cushion layer by aramid fiber, the sheath mainly comprises a first water-blocking taping layer, two buoyancy control unit twisting layers, a second water-blocking taping layer, an aramid fiber reinforcing layer and an outer polyurethane sheath which are coated on the cable core sequentially, and a copper core signal wire and/or a coaxial cable signal wire are/is arranged in the cable core. The invention has the advantages of reasonably and flexibly controlling the buoyancy of an optoelectrical composite cable, satisfying special application requirements of operation positioned on a water surface or underwater and obviously improving the tension intensity.

A floadting cable includes a conductor coated with the insulated sheath, an inner sheath and an outer sheath, wherein the inner sheath is made of the thermoplastic elastomer coated on the insulation sheath of the conductor; the outer sheath is made of the mixtures of the thermoplastic elastomer, the foaming agent and the lubricant, which are coated on the outside of the inner sheath in definite amounts by weight after being mixed to form the foaming layer, and foaming micropores are formed in the foaming layer. The cable has the advantages of floating on the water because the global density of the cable is smaller than 1, which is convenient to maintain; providing with excellent global density and the frequent bending tolerance; mixing the foaming agent into the outer sheath, wherein airtight foaming micropores are formed in the outer sheath to constitute the foaming layer in the extruding process; the foaming layer adopts the conventional extruding device in the cable industry to coat on the outside of the inner sheath, which not only leads the inner structure of the floating cable with simple structure, but also is convenient to process with high production efficiency, which is suitable for the industrialization volume production.

Disclosed herein is an electrically conductive buoyant cable. The cable includes an electrical conductor member having at least one electrical conductor. The cable also includes a filler layer that consists of buoyant materials with relative density lower than 1. The filler layer surrounds and encloses the electrical conductor member. The invention includes a jacket, which, in one embodiment, contains a small quantity of filler material or no filler material. The jacket surrounds the filler layer. In one embodiment, the filler layer and the jacket are made of the same material.

The invention relates to a cable migrating and moving in water, which belongs to the technical field of electromechanical products. In order to meet the special requirements on wiring for an electrical installation working underwater, the invention provides a cable which cannot be enwound and wringed by self, cannot be daggled in a pool bottom and is basically parallel with the pool bottom surface when migrating and moving in water, and has an outer diameter not more than 15 millimeters. The cable comprises a conductor, an insulting layer, a cable core center padding, an inner protective layer and an outer protective layer. The cable is characterized in that the thickness of the inner protective layer made of foamed plastic is less than 3 millimeters, and the outer diameter of the cable is not more than 15 millimeters. The cable is used for connecting the electrical installation working underwater and supplying power for the same. The cable is soft with hardness, has elastic resilience and cannot be enwound and wringed by self when migrating and moving disorderly under water along with the electric installation, the inner protective layer is made of the foamed plastic so that the cable has light weight and the function of blocking water, is suitable for horizontal operations, cannot be daggled in the pool bottom and is basically parallel with the pool bottom surface in work, and has small outer diameter size, simple structure and low cost, and the manufacturing process and devices are general process and devices.

A seismic streamer includes a jacket covering an exterior of the streamer, at least one strength member extending along the length of and disposed inside the jacket, at least one seismic sensor mounted in a sensor spacer affixed to the at least one strength member, and a void filler made from a material introduced into the jacket in liquid form and undergoing state change thereafter. The jacket includes an inner layer in contact with and having adhesiveness to the void filler, and an outer layer disposed over the outer layer and having substantially no adhesiveness.

The invention relates to a cable. A cable for a water floating ship comprises an outer insulating layer, an inner insulating layer and cable cores, wherein a waterproof layer is arranged between the outer insulating layer and the inner insulating layer; a fiber woven layer is arranged between the inner insulating layer and cable cores; the number of the cable cores is at least two; the outer insulating layer is extruded by a foaming thermoplastic elastomer and is flat; and the inner insulating layer is an insulating layer containing fluoroplastic. According to the technical scheme, the cable for the water floating ship can be floated on the water surface and has the advantages of high flexibility and bendability, high water-blocking performance, ideal mechanical strength and the like.

A sea electrode (15) for grounding of a high voltage direct current transmission system comprises an electrically conducting electrode body (1) for connection to the transmission system and at least one ballast (4) located above the electrode. The electrode further comprises a layer (5) of an electrically non-conducting material, located above the electrode body and extending over it, so as to influence the maximum electrical field strength not to exceed a desired level at a point (P) at the edge of the non-conducting layer and thereby also in the sea water outside a zone (35) located below the non-conducting layer and in a vertical direction limited by the edge of the non-conducting layer.

The invention discloses a solid towline with good dragging performance for marine seismic exploration. The solid towline is characterized in that the solid towline comprises a main cable, hydrophones,buoyancy sleeves and an outer sheath. The hydrophones are fixedly arranged on the main cable with an equal interval. The hydrophones are electrically connected to corresponding wire cores in the maincable. Each of the buoyancy sleeves is made of a foamed polyethylene material, and foamed polyethylene is extruded on the main cable. The main cable includes the transmission wire cores, a tensile fiber layer and a conductive wire layer. The tensile fiber layer is formed by weaving aramid yarn and/or polyester yarn outside the transmission wire cores. The conductive wire layer includes a set of power lines and a set of signal lines. The power lines and the signal lines are orderly arranged with an equal interval along the circumferential direction of the main cable outside the tensile fiber layer to form the corresponding wire layer. The buoyancy sleeves are fixedly arranged on the main cable with an equal interval, and each of the buoyancy sleeves is between two adjacent hydrophones. Theouter sheath is made of a thermoplastic polyurethane elastomer rubber material and is extruded outside the hydrophones, positioning ends and the buoyancy sleeves, and the outer sheath is seamlessly bonded to the hydrophones.

The invention belongs to the technical field of power cables, and particularly relates to a water floating cable. The problems of poor waterproof performance and low tensile strength of the connectionpart of the water floating cable in the prior art are solved. The technical scheme of the invention is as follows: the method comprises the following steps: the cable comprises a cable core, an insulating layer, a waterproof layer and a floating layer and also comprises a floating cable connecting device; the floating cable connecting device comprises a shell and a top cover, the shell is connected with the top cover in a sealed mode; a cable connecting chamber and cable sealing parts arranged on the two sides of the cable connecting chamber are defined by the shell; the cable sealing part isof a cylindrical structure; the end, away from the cable connecting chamber, of the cable sealing part is connected with a conical sealing block, the cable sealing part matches the conical sealing block in shape, and the conical sealing block is connected with the end face of the shell through a fastening bolt. The waterproof performance and the tensile strength of the connection part of the water floating cable are improved, the cable is prevented from being snapped or leaking electricity, and the cable is suitable for supplying power and communicating with mechanical equipment.

Disclosed herein is an electrically conductive buoyant cable. The cable includes an electrical conductor member having at least one pair of electrical conductors. The electrical conductors are embedded into a core member. The core member defines a filler layer. A reinforcing member is similarly embedded into the core. The reinforcing member includes strands of reinforcing fibers. The reinforcing members are grouped to support the electrical conductor and prevent delamination. A skin member surrounds the core member and encapsulates the members and prevents water penetration. A tie down member secures each end of the cable while an end cap is fitted over the tie down member. The end cap is sized and shaped for compatible engagement with the desired movable device and a power source.

A buoyancy signal cable used for ocean operations is provided, which is adapted to the signal transmission in the fields of undersea exploration, ocean rescue, salvage and scientific exploration. The cable comprises a floating core and at least two wire cores for signal transmission and an outer protective cover, arranged outside the floating core. The floating core comprises a fibrous body and a first coating layer covered outside the fibrous body. The wire core comprises at least one pair of a conductor and a second coating layer covered outside the conductor. A first winding layer, a fibrous layer and a second winding layer are arranged, from the inside to the outside, between the outer protective cover and the wire core. A water-proofing material is filled in the space between the first coating layer and the first winding layer. The invention has the advantages of reduced density, increased mechanical strength, capability of meeting the operation requirement of no breakage under frequent bending, guarantee of uniform stress, long service life, reliable water-proof function of wire core as the cable core, and protection against seawater invasion.

The invention discloses a traveling floating cable for offshore platforms, which comprises tin-plated copper conductors. Each tin-plated copper conductor is coated with a cross-linked polyethylene insulating layer. The cross-linked polyethylene insulating layers are coated with a carbon fiber braided shielding layer. A high-strength tensile filling layer is arranged between the cross-linked polyethylene insulating material and the carbon fiber braided shielding layer. The carbon fiber braided shielding layer is coated with a foamed polyethylene filling layer wrapping several control line cores. The foamed polyethylene filling layer is coated with a Kevlar fiber braided strengthening layer. A medium-density polyethylene inner sheath is arranged by extrusion outside the Kevlar fiber braidedstrengthening layer. A foamed polyethylene sheath is arranged by extrusion outside the medium-density polyethylene inner sheath. A medium-density polyethylene outer sheath is arranged by extrusion outside the foamed polyethylene sheath. Compared with traditional cables, the traveling floating cable for offshore platforms in the invention has the advantages of wind-resistant, waterproof, wear-resistant, tensile, light and environment-friendly.

Disclosed herein is an electrically conductive buoyant cable. The cable includes an electrical conductor member having at least one electrical conductor. The cable also includes a filler layer that consists of buoyant materials with relative density lower than 1. The filler layer surrounds and encloses the electrical conductor member. The invention includes a jacket, which, in one embodiment, contains a small quantity of filler material or no filler material. The jacket surrounds the filler layer. In one embodiment, the filler layer and the jacket are made of the same material.

The invention provides a degradable deep-sea cable. The degradable deep-sea cable comprises an optical fiber transmission cable, a power transmission cable, a first coating layer and a second coating layer, wherein the optical fiber transmission cable is coated with the first coating layer; the power transmission cable is twisted together with the optical fiber transmission cable coated with the first coating layer; the power transmission cable and the optical fiber transmission cable which are twisted together are coated with the second coating layer. The degradable deep-sea cable has the beneficial effect that the buoyancy force of the cable is increased effectively, and the buoyancy force of the cable can be controlled by controlling the quantity of air bubbles in a cable sheath, so that the cable can dive to a preset depth in the sea; moreover, a shielding layer is designed by weaving fine copper wires, so that the shielding layer can be effectively prevented from damaging the cable when being fractured, and effective tensile strength can be provided for the cable.