59 results about "Production packer" patented technology

In a multiple well completion, spaced apart production packers isolate independent production zones from one another. In each isolated production zone, a side pocket mandrel with a full opening bore has lengthwise extending side by side elongated pockets (1) for receiving a static pressure measuring instrument or tool (static pressure pocket); (2) for providing a venturi flow passageway (flow passageway pocket); and (3) for receiving a differential pressure measuring tool (differential pressure pocket). The static pressure measuring tool and the differential pressure measuring tool or instrument are commonly connected by a data coupling means to a single electrical conductor line which is strapped to the string of tubing and extends to the earth's surface for transmission of control signals and data signals between the earth's surface and the various side pocket tools. The venturi flow passageway is connected for fluid communication with the static pressure pocket and the differential pressure pocket in the side pocket mandrel. Fluid flow from a particular production zone is channeled through the respective venturi flow passageway to the full opening bore and the fluid flow parameters are communicated to the static pressure measuring tool and to the differential pressure tool. The flow passageway is constructed and arranged to develop a differential pressure which is measured by the differential pressure measuring tool. At the same time, the static pressure of the production fluid in the production zone is measured by the static pressure measuring tool. Both the differential pressure measurements and the static pressure measurements may be transmitted to the surface and recorded as a function of real time.

A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wireline tools for performing other operations. The spoolable coiled tubing system may use standard coiled tubing well control equipment and can be used in live wells. The flush, flexible, spoolable and through bore completion equipment may include a tubing retrievable safety valve, an annular control valve, concentric gas lift valves, a zone packer, a landing nipple, a sliding sleeve, and may include at the end a non-flexible but flush and open bore production packer and pump out plug. The completion system may be retrieved through a retrieval system.

A well completion system for creating a seal between a production tubing (30) and a well casing (34) positioned within a wellbore (32) comprises a production packer (46) that includes a section of the production tubing (30) and at least one seal element (60). The production tubing (30) is then positioned within the well casing (34) that lines the wellbore (32). An expander member (56) that is positioned within the production tubing (30) then travels longitudinally through the production packer (46) to expand the section of the production tubing (30) downhole that includes the seal element (60). This expansion creates a sealing and gripping relationship between the production tubing (30) and the well casing (34).

A well completion procedure and apparatus comprises a first assembly that includes production tubing combined with a production packer and an internal bore latching profile. A second assembly comprises an explosive perforating gun secured to a latching mechanism. The perforating gun and latching mechanism are dimensioned to freely traverse the flow bore of the production tubing for downhole retrieval and return after the packer is set. The latching mechanism may be released by discharge of the gun.

A production packer comprising a packer body, a flat plate, a sealing element, production tubing, water overflow tubing, gas vent tubing, pump cable pack-off tubing, and an optional pressure transducer port. The flat plate is welded onto the top of the packer body. The sealing element is bonded to the outside of the packer body. In the preferred embodiment, the packer body is a steel pipe, and the flat plate is made of steel. The packer is placed inside a production casing, and the diameter of the sealing element is greater than the diameter of the production casing. The sealing element is made out of a material that is durable enough to withstand the pressures associated with a production packer, flexible enough to fit inside the production casing, and elastic enough to create a seal between the packer body and the production casing.

Apparatus and method for a providing a completion assembly for running at an end of a completion string which provides a remotely operable tubing mounted valve used to control the flow of fluids through the tubing in hostile well conditions. The tubing mounted completion assembly has a tubular body for connection in the string below a production packer with a through bore from a first inlet and a first outlet coaxially aligned with the string; a downhole electronic actuating mechanism, a downhole hydraulic pump and a hydraulically operated ball valve member. The actuating mechanism operates the hydraulic pump to provide a hydraulic control line to control movement the valve member from a first position, where the member is open and a through bore is created between the inlet and outlet of the assembly, to a second position, where the valve seals the throughbore and, finally, back to the first position.

A method of cementing an oil or gas well for abandonment comprises cutting the production tubing 6 above the production packer 8, setting a tubing plug 9 in the tubing and then cutting the tubing. A bridge plug may be installed at the level of the cut, which spans the full diameter of the well casing 3. An agitator assembly 20 comprising an agitator 24, packer 21 and burst sub 23, with a running tool fitted to the top, is run down the tubing on wire line. Cement is then injected into the tubing 6, which flows through the agitator assembly and causes the tubing to vibrate. The cement fills the tubing but also flows back up the A annulus between the casing and production tubing. Vibration of the tubing assists the formation of a good quality cement plug extending all around the annulus over a substantial length of the well.

The present invention provides a tool capable of being set and released without requiring the complexity of former tools. A novel arrangement of a push sleeve in the spring body eliminates the need for several shear pins while an internal J slot formed directly on the mandrel significantly reduces the size of the lower drag body and thus the length of the tool. These and other improvements to the packer tool result in a significantly simplified tool capable of meeting the full requirements of a production packer.

A system and method for systematically and economically recovering formation liquids from the bottom of a petroleum well are disclosed. In a preferred embodiment, the system and method are passive in that they utilize the existing formation pressure of the well to remove fluid build-up across the perforations of the well bore in a manner that is completely free from surface control. The system is comprised of strategically placed carrier subs with installed pressure regulating devices. These carrier subs are regularly spaced below the production packer, along the tail pipe section of the production tubing string and facing the perforated intervals of the well bore. The pressure of the trapped formation gas above the accumulating formation liquid is insufficient to remove all of the formation liquid within the entire length of the tubing string 13. However, an open pressure regulating device mounted on the tailpipe section of the tubing string allows a smaller portion of the formation liquid within the tubing string to be produced to the surface using the existing formation pressure. By systematically removing portions of the formation liquid from within the tubing string using the regularly spaced pressure regulating valves, the formation fluid build-up across the perforations is eliminated, and the petroleum well is able to produce at higher rates and for a longer period without intervention.

A releasable production packer employs lock ring segments that are biased radially inwardly for engaging a mating pattern external to the packer mandrel. The mandrel has openings aligned with the segments and a release tool that latches to the mandrel for support and then moves the segments radially outwardly away from engagement with the mandrel so that the slips and sealing elements can extend axially and retract radially. After those movements the packer is retrieved. The release tools moves the locking segments only radially for the maximum mechanical advantage without risk of bending or deforming small parts.

The invention discloses an underground nitrogen-making induced flow completion pipe string having a pressure monitoring function. The underground nitrogen-making induced flow completion pipe string is mainly composed of an oil pipe hanging part, an oil pipe, an underground safety valve, an underground pressure meter, a production packer, a working cylinder, an inserting positioning seal, a blind pipe and an underground nitrogen-making induced flow device. The upper end of the oil pipe is hung in an oil well through the oil pipe hanging part. The underground safety valve, the underground pressure meter, the production packer and the working cylinder are arranged on the oil pipe. The lower end of the oil pipe is connected with the blind pipe through the inserting positioning seal which is inserted into a sealing cylinder of a sand control packer in the oil well. The underground nitrogen-making induced flow device is inserted into the blind pipe. Due to adoption of the above structure, after a first safety shield of a gas well is built, a Christmas tree is assembled, and setting and seal examination are carried out on the production packer until the production packer is qualified, a large amount of nitrogen can be rapidly generated through dropbar excitation and the gas well is induced. Besides, in the long-term production process, the underground pressure is monitored in real time. The underground nitrogen-making induced flow completion pipe string has a good application and popularization prospect.

The invention discloses a composite bridge plug made of ceramic slips, which comprises a central tube. The outer circumference of the central tube is sequentially provided with a push ring, an upper positioning cone, a rubber tube, a lower positioning cone and a spacer ring. The spacer ring is fixedly connected with the central tube, the push ring, the upper positioning vertebral body, the rubber tube and the lower positioning vertebral body can all move along the axial direction of the central tube, and the upper positioning One end is in contact with the push ring, a plurality of lower bases are provided on the circumference of the lower positioning vertebral body, one end of the lower base is in contact with the spacer ring, and ceramic slips are provided on the outer circumferences of the upper base and the lower base; The ceramic slip composite bridge plug of the present invention is quickly sent to the target layer through a cable or a coiled tubing, and is sealed by gunpowder or hydraulic setting to realize the isolation of production layers or non-target layers, so as to achieve the purpose of changing wellbore conditions and achieving isolation , to meet the follow-up construction requirements. After the construction is completed, it can achieve fast milling and flowback effects, which improves work efficiency.

The invention discloses a rapid induced flow completion pipe column for a subsurface nitrogen making gas well. The rapid induced flow completion pipe column for the subsurface nitrogen making gas well is mainly formed by a mandrel hanger, an oil tube, a subsurface safety valve, a production packer, a working barrel, an insertion positioning seal, a blind tube and a subsurface nitrogen induced flow device; the upper end of the oil tube hangs inside an oil well through the mandrel hanger; the subsurface safety valve, the production packer and the working barrel are respectively arranged on the oil tube; the lower end of the oil tube is connected with the blind tube through the insertion positioning seal; the insertion positioning seal is inserted inside a sealing cylinder of a sand control packer inside the oil well; the subsurface nitrogen making induced flow device is inserted to the blind tube; the subsurface nitrogen making induced flow device is mainly formed by an ignition head, an exploder, a booster tube, a detonating cord, a gas generating agent and an outer casing; the ignition head is arranged at the top of the exploder; the exploder is connected with the detonating cord through the booster tube; the outer casing is full of the gas generating agent which is connected with the detonating cord. According to the above structural form, the rapid induced flow completion pipe column for the subsurface nitrogen making gas well has the advantages of being few in induced flow operation equipment, simple in operation process, high in efficiency, low in cost and stable and reliable.

The invention relates to the field of intelligent well completion of oil and gas well exploitation, and particularly provides a multi-layer intelligent tubular column controlled by a single pipeline. A Christmas tree is connected with the top of an oil pipe, and sealers are installed on the outer wall of the oil pipe and the inner wall of a wellhead. A safety valve, a production packer, a connector, an electric pump, a circulating sliding sleeve, a decoder, a positioning sealing assembly, a data acquisition instrument, a multi-stage control unit and an isolation sealing assembly are sequentially installed at the bottom of the oil pipe from top to bottom, the positioning sealing assembly is in interference sealing connection with a top packer, the isolation sealing assembly is in interference sealing connection with an isolation packer, the decoder is connected with the control system through a main pipeline, the bottom of the decoder is connected with the multi-stage control unit through a branch pipeline, and the data acquisition instrument is connected with a data acquisition system through a cable. The reliability and timeliness are improved, real-time detection and adjustment are achieved, cost is saved, operation safety is improved, operation difficulty is lowered, labor intensity is lowered, and the service life is prolonged.

The invention discloses an insertion-pipe-type waterproof production packer and a working method thereof. The upper end of an insertion pipe is connected with an insertion pipe joint, a gap is formedbetween a center pipe and the insertion pipe, the center pipe and the insertion pipe are provided with overcurrent holes, insertion pipe sealing mechanisms are arranged at the upper and of the insertion pipe and the lower end of the center pipe, an unblocking device is arranged in the upper setting sealing mechanism, the upper setting sealing mechanism and a lower setting sealing mechanism are connected through an anchoring mechanism, and the upper setting sealing mechanism, the unblocking mechanism, an upper rubber cylinder, the anchoring mechanism, a lower rubber cylinder, the lower settingsealing mechanism and a releasing mechanism sleeve the center pipe in sequence from top to bottom. According to the insertion-pipe-type waterproof production packer, after isolated production is completed, an upper pipe column can freely lift and fall by inserting and extracting the insertion pipe, the problem that after conventional isolated production, when pump inspection or measure work is conducted, the packer needs to be deblocked and pulled out is solved, the setting sealing effect on the packer is obviously improved, the corrosion resistance of slips is effectively improved, the frequency of isolated production treatment is reduced, and the isolated production validity period is prolonged.

The present invention relates to a downhole system for unloading a liquid of a well in an annulus between an intermediate casing and a production tubular metal structure. The downhole system comprises the intermediate casing; a pump at a top of the well, configured to pressurise the annulus to displace the liquid in the annulus; the production tubular metal structure having a first inner diameter, arranged partly in the intermediate casing, thereby defining the annulus; a production packer arranged between the intermediate casing and the production tubular metal structure, and a first liquid unloading assembly and a second liquid unloading assembly, each comprising a tubular part having a wall having a second inner diameter, an outer face and an aperture, the tubular part being configured to be mounted as part of the production tubular metal structure; and a check valve connected with the outer face, the check valve having an inlet in fluid communication with the annulus and an outlet in fluid communication with the aperture. The downhole system further comprises a sliding sleeve arranged to slide along an inner face of the tubular part between an open position and closed position to open or close the aperture. Furthermore, the present invention relates to a liquid unloading method for unloading liquid of a well in an annulus between an intermediate casing and a production tubular metal structure.

The invention discloses an oil-gas well serial double-submersible-electric-pump airtight production pipe column. The pipe column comprises a casing in an oil production well, an oil pipe in the casing, an underground safety valve which is arranged on the upper portion of the oil pipe and connected with a liquid control pipeline, and a casing packer which is arranged at the bottom of the oil pipe, internally provided with a positioning seal and a guide shoe and provided with a sealing cylinder; a cable production packer, an upper airtight electric submersible pump system, an underground tool direction adjusting device and a lower airtight electric submersible pump system are sequentially connected between the underground safety valve and the positioning seal in series from top to bottom. The upper and lower airtight electric submersible pump systems comprise airtight hangers and airtight system tanks connected with the lower portions of the airtight hangers. The packer is used for isolating stratum liquid from the portion, above the packer, of the casing at a deep position of a shaft, and casing protection liquid can be inserted into an annulus, between the oil pipe and the casing, above the casing packer, so that the production casing is effectively protected and prevented from being eroded by fluids high in sulfur content and high in corrosivity.