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2638 results about "Well cementing" patented technology

Well cementing is the process of introducing cement to the annular space between the well-bore and casing or to the annular space between two successive casing strings. Personnel who conduct this job are called "Cementers".

Novel ultra-large-displacement ultrahigh-pressure well cementing equipment

The invention discloses novel ultra-large-displacement ultrahigh-pressure well cementing equipment. The novel ultra-large-displacement ultrahigh-pressure well cementing equipment comprises a loading carrier. A hydraulic system, a power transmission system, a metering tank, an electrical system, an air path system, a control system, an operating platform, a plunger pump, a clean water manifold, a mud manifold, a high-pressure manifold, a mixing system and an ash feeding manifold are mounted on the loading carrier, wherein the plunger pump is a five-cylinder plunger pump. The five-cylinder plunger pump is adopted to increase the pressure and displacement of the well cementing equipment, and the requirements of high pressure and large displacement are met; slurry mixing is carried out by double mixing devices, the mixing efficiency is improved, the stability of the slurry mixing density is improved, and the requirement of long-time uninterrupted operation is guaranteed; a mixing system pipeline is optimized, multiple sets of mixing systems are integrated on one slurry mixing tank, and the stability of the equipment is improved; and the clean water manifold is optimized, so that watersupply requirements of the multiple mixing devices can also be met at the same time by using one injection pump, and the requirement of large displacement is met.
Owner:YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD

Novel well cementation truck

The invention discloses a novel well cementation truck, which comprises a loading body, an electrical system, a plunger pump, a clear water manifold, a mud manifold and a high-pressure manifold, wherein the loading body is provided with a cross beam; the cross beam is provided with a hydraulic system, a power transmission system, a metering tank, an operating platform and a mixing system in sequence; the operating platform is provided with a gas path system and an operating system in sequence; the electrical system supplies power to the well cementation truck; the plunger pump, the clear watermanifold, the mud manifold and the high-pressure manifold are all arranged below the operating platform; the clear water manifold supplies water to the plunger pump and the mixing system; the mud manifold provides mud for the plunger pump; the plunger pump injects the mud into a well through the high-pressure manifold; and the well cementation truck also integrates with a steady pressure ash can,an air compressor and an air bottle. The novel well cementation truck has the beneficial effects that a spatial layout is optimized, and the steady pressure ash can, the air compressor and the air bottle are integrated in one well cementation truck. An ash feeding manifold is optimized, so that the steady pressure ash can supplies ashes, and ash supply equipment can be externally connected for supplying ashes. The large-volume air bottle is adopted, and therefore, air can be supplied to other equipment while the requirements of the well cementation truck are met.
Owner:YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD

Electrically-driven ultra-large-displacement well cementation equipment

The invention discloses electrically-driven ultra-large-displacement well cementation equipment. The electrically-driven ultra-large-displacement well cementation equipment comprises a first loading body and a second loading body; an auxiliary motor, a main motor, a clear water module, a pumping module, a control module, a hydraulic module and a mixing module are fixedly loaded on the first loading body; and a frequency converter module is fixedly loaded on the second loading body. The electrically-driven ultra-large-displacement well cementation equipment has the beneficial effects that the main motor is adopted to drive a plunger pump, torque converters are reduced, the layout space of the whole vehicle is increased, the auxiliary motor is adopted to drive a whole vehicle hydraulic system, and the number of driving motors is reduced; the frequency converter module and the well cementation equipment are loaded separately, the loading requirement is lowered, the structure is simpler, the occupied space is reduced, one frequency converter module can supply power to all the modules on the multiple first loading bodies at the same time, and use is flexible; and the main motor, the auxiliary motor and the hydraulic heat dissipation device are intensively distributed on the front portion of the first loading body, wiring is simple, connection is convenient, heat dissipation of equipment is intensively achieved, scalding accidents of workers in the operation process are avoided, and operation safety is improved.
Owner:YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD

Device and method for preparing nitrogen foam cement

The invention discloses a device and method for preparing nitrogen foam cement. The preparing device comprises a foam cement producer, a liquid nitrogen evaporator, a liquid nitrogen plunger pump, a foam liquid plunger pump, a foam liquid tank, a heat exchange system, a liquid nitrogen pipeline, a high-pressure cement paste pipeline, a first pipeline, a foam cement discharge pipeline and a densitydetecting device. The heat generated by a power unit, a hydraulic system and other devices in a nitrogen foam well fixing device is recovered through the heat exchange system, the recovered heat is used as a heat source of the liquid nitrogen evaporator, energy conservation and environment protection are realized, the energy utilization rate is high, and equipment input is low. Liquid nitrogen and foam liquid are pressurized through a high-pressure liquid nitrogen plunger pump and a high-pressure foam liquid plunger pump, the mixing uniformity is increased, and the density of foam cement is reduced. The density of the foam cement is detected in real time through the density detecting device, the flow of the liquid nitrogen and/or foam liquid is adjusted according to the density, and the density is simply controlled. By arranging a clear water tank, after operation ends, the equipment and pipelines are flushed, and the service life is polonged.
Owner:YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD

Remote automatic cement supplying control system

PendingCN107656499ARealize remote automatic centralized controlRealize the centralized control of the whole processProgramme control in sequence/logic controllersProportional controlRemote control
The invention belongs to the field of petroleum equipment, and particularly relates to full-automatic intelligent remote controlled well solidifying equipment, and to a remote automatic cement supplying control system for well solidifying equipment. The remote automatic cement supplying control system comprises a control unit, an air compressor, a cement tank and a cement valve. The remote automatic cement supplying control system is characterized in that the control unit comprises an equipment end operating screen, an equipment end PLC processor, a remote control operating screen and a remotecontrol PLC processor; the equipment end operating screen, the equipment end PLC processor, the remote control operating screen and the remote control PLC processor are connected through netting twines; the equipment end PLC processor can remotely control a remote control module for starting and stopping the air compressor, thereby controlling the air compressor through the remote control module;after the air compressor is started, high-pressure air is discharged to the cement tank; the equipment end PLC processor automatically calculates a required cement supplying amount through a preset density of the well solidifying equipment; through comparing the calculated cement supplying amount with a current acquired cement supplying amount, proportion controlling and adjustment of the cementvalve are performed; and furthermore the cement supplying amount of the equipment is controlled.
Owner:CNPC DRILLING RES INST +2

Downhole surge reduction method and apparatus

A method and apparatus for use in the oil well industry for running in drilling/production liners and sub-sea casings down a borehole through drilling fluid on a drill pipe using a running tool with the benefits of surge pressure reduction are disclosed. In accordance with the present invention, a surge pressure reduction tool includes a diverter device having a housing with a set of flow holes formed therein and a sliding sleeve residing within the housing having a set of flow ports formed therein. By aligning the set of flow holes of the housing with the set of flow ports of the sleeve, the tool is set in a "surge pressure reduction" mode. By shifting, or axially indexing, the sleeve downward, the set of flow holes is blocked by the sleeve thus setting the tool in a "cementing" or "circulation" mode. This shifting or indexing is accomplished using an indexing mechanism. The indexing mechanism of the present invention includes a spring ring which is initially compressed and set in a circumferential groove formed around the top of the sleeve. As the sleeve is shifted downward from surge reduction mode to cementing/circulation mode, the spring ring decompresses radially outward to engage a circumferential groove formed in the housing. This effectively locks the sliding sleeve in the cementing/circulation mode. In accordance with the present invention, a surge pressure reduction tool further includes a volume compensation device which enables the diverter device to be shifted axially downward into the cementing/circulation mode even where the drilling/production liner or sub-sea casing is plugged with drill cuttings or downhole debris. In the cementing/circulation mode, a flow path is established for cement or drilling fluid to flow downward from the drill pipe, through the diverter device, volume compensation device, and running tool, and out into the borehole via the drilling/production liner or sub-sea casing. In the surge pressure reduction mode, an alternative flow path is established for drilling fluid to flow upward from the borehole into the drilling/production liner or sub-sea casing, through the running tool and volume compensation device, and into an annular space between the drill pipe and the borehole via the set of flow holes of the diverter device.
Owner:ALLAMON INTEREST +1

Multi-purpose float equipment and method

A float shoe / collar apparatus and method for multi-purpose use in running a tubular string such as a casing string or liner into a wellbore and for optimizing cementing operations. In one presently preferred embodiment, the apparatus permits auto filling of the tubular string as the string is lowered into the wellbore. Circulation can be effected through down jets for washing the wellbore as necessary. After the tubular string is positioned, the down jets can be blocked off and up jets opened to thereby direct cement upwardly to optimize cement placement. Check valves can also be activated to prevent flow from the wellbore into the tubular string. In one embodiment, the apparatus comprises an inner member and tubular member. The inner member is movable upon release of shear pins to cause longitudinal movement relative to the outer member. The movement of the inner member may close a plurality of downward jets and may also open a plurality of upward jets, if desired. The apparatus may also be equipped with a set of check valves which can be held open on run in, and subsequently activated to thereby automatically close upon cementing to prevent "u-tubing" of fluid back into the casing. In another embodiment a float collar comprises the same valve / valves as the float shoe, without jets. This float collar may be run in conjunction with a guide shoe, with or without jets.
Owner:FORUM US
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