Abstract: A system for controlling surge pressure and deployed into a wellbore drilled using a managed pressure drilling technique includes auto-fill float equipment allowing flow into a liner casing string, a drillpipe diverter providing a flow path between a drillpipe landing string and an annulus, and a drillpipe flow restrictor selectively blocking the flow path from the top of the drillpipe landing string while allowing fluid to be displaced up the liner casing string and into the annulus. The drillpipe flow restrictor and the drillpipe diverter are convertible to provide a flow path from the wellbore through the auto-fill float equipment to a top surface while blocking flow through the diverter into the annulus. The auto-fill float equipment is convertible to block the flow path from the wellbore into the liner casing string, while allowing fluid to flow from the liner casing string into the wellbore.

Abstract: A method of designing a cement slurry may include: (a) selecting at least a cement and concentration thereof, water and concentration thereof, and, optionally, at least one supplementary cementitious material and a concentration thereof, such that a cement slurry comprising the cement, the water, and, if present, the at least one supplementary cementitious material, meet a density requirement; (b) calculating a thickening time of the cement slurry using a thickening time model; (c) comparing the thickening time of the cement slurry to a thickening time requirement, wherein steps (a)-(c) are repeated if the thickening time of the cement slurry does not meet or exceed the thickening time requirement, wherein the selecting comprises selecting different concentrations and/or different chemical identities for the cement and/or the supplementary cementitious material than previously selected, or step (d) is performed if the thickening time of the cement slurry meets or exceeds the thickening time requirement; and p

Abstract: A cement wiper plug for deployment in casing with an inner radius has a central axis, a leading end, and a trailing end opposite the leading end. The wiper plug includes an elongate body. In addition, the wiper plug includes a first plurality of axially adjacent annular fins mounted to the body. Each fin extends radially outward from the body and each fin extends circumferentially about the body. The first plurality of fins includes a first fin and a second fin axially adjacent the first fin. The second fin is axially positioned between the first fin and the trailing end. The first fin and the second fin are configured to contact each other in the casing. The second fin is configured to bias the first fin radially outward and axially forward toward the leading end.

Abstract: A float equipment assembly includes an inner string that provides a fluid flow path through the float equipment assembly. The float equipment assembly also includes an opening through which a fluid flowing through the inner string exits the float equipment assembly. The float equipment assembly further includes a moveable member, which when repositioned, isolates the inner string. The float equipment assembly further includes a dissolvable material that initially prevents repositioning of the moveable member, where the moveable member is repositioned after a threshold portion of the dissolvable material has dissolved.

Abstract: An oil or gas production method forms a wellbore in a rock formation, wherein the wellbore including a lateral portion, and the method introduces a plurality of perforation diverters into the wellbore, wherein each perforation diverter in the plurality of diverters includes circuitry for determining a pressure proximate the perforation diverter, and the method measures a respective pressure proximate each perforation diverter and within the lateral portion.

Abstract: An apparatus for controlling bottomhole pressure in a wellbore during cementing includes a sensor positionable to measure pressure in the bottomhole of the wellbore, a controllable valve, and a controller. The controller may be positionable to receive pressure measurements from the sensor and control the controllable valve to maintain a specified pressure in the wellbore based on the pressure measurements. The apparatus may be positionable in a bottomhole portion of the wellbore.

Abstract: A method of cementing may include: measuring a feeding rate of water and a feeding rate of cement blend into a cement blender; calculating a cement retarder feeding rate and/or an accelerator feeding rate using a thickening time model, wherein the thickening time model uses at least a thickening time requirement, the feeding rate of water, and the feeding rate of cement blend, to calculate the cement retarder feeding rate and/or the accelerator feeding rate; introducing a cement retarder at the cement retarder feeding rate and/or an accelerator at the accelerator feeding rate into the cement blender; mixing at least the water, cement blend, and at least one of the cement retarder and/or the accelerator in the cement blender to provide a cement slurry; and placing the cement slurry in a wellbore.

Abstract: A method of pressure testing a casing string in a reverse cementing operation in a wellbore can include: introducing the casing string and a downhole tool installed within the casing string into the wellbore, wherein the downhole tool comprises a fluid flow path defined by an inner diameter of the downhole tool; introducing a cement composition into an annulus located between a wall of the wellbore and an outside of the casing string; causing the fluid flow path of the downhole tool to close against fluid flow from the annulus into at least a portion of the casing string; and increasing pressure within the portion of the casing string that is closed against fluid flow from the annulus. The fluid flow path can be closed by shifting an inner sleeve to close a flapper valve or flow ports, a bridge plug, a packer, or a ball and a ball seat.

Abstract: A method and an apparatus for oil production by increasing resistance of borehole wall for improving an energy utilization rate of injection gas includes injecting gas into an oil reservoir so that a gas pressure in the oil reservoir reaches an initial oil reservoir pressure. The initial oil seepage pressure is present at a position where the inside of the production well is in communication with the oil reservoir. The initial oil seepage pressure is less than the initial oil reservoir pressure. The method also includes monitoring gas production and oil production of the production well and increasing the initial oil seepage pressure to an increased oil seepage pressure when a ratio of the gas production to the oil production is higher than a predetermined ratio. The increased oil seepage pressure is smaller than the initial oil reservoir pressure.

Abstract: A method of designing a cement slurry comprising: (a) selecting at least a cement and concentration thereof, a water and concentration thereof, and one or more chemical additives concentration thereof such that a cement slurry formed from the cement, one or more chemical additives, and the water meet a density requirement; (b) calculating a thickening time of the cement slurry at the wellbore temperature using a thickening time model; (c) comparing the thickening time of the cement slurry to a thickening time requirement and performing steps (a)-(c) if the thickening time of the cement slurry does not meet or exceed the thickening time requirement, wherein the step of selecting comprises selecting different concentrations and/or different chemical identities for the cement and/or one or the more chemical additives than previously selected, or performing step (d) if the thickening time of the cement slurry meets or exceeds the thickening time requirement; and (d) preparing the cement slurry.

Abstract: A running tool includes a tool body having a fluid conduit, and an actuation assembly including an actuator member connected to a release mechanism, the actuator member moveable in an axial direction from a first position to a second position to cause the release mechanism to disengage with a downhole component. The actuation assembly includes a first pressure chamber in pressure communication with the fluid conduit, where the running tool is configured to be activated to release the downhole component by applying fluid pressure to the first pressure chamber to generate an actuation force that moves the actuator member to the second position. The running tool also includes a second pressure chamber in pressure communication with the same fluid conduit. The second pressure chamber is configured to receive borehole fluid from the fluid conduit during deployment and apply a balancing force to the actuator member during the deployment.

Abstract: A plug for Plug and Abandonment (P&A) operations. The plug is a two-part plug of bismuth-based alloy and resin, allowing for sealing of an oil well using two different mechanisms with a shorter plug. The sealing can be rock-to-rock and/or cast-in-place.

Abstract: A downhole tool for applying a force to a component in a borehole penetrating a subsurface formation includes an acoustic transducer configured to receive an acoustic signal. The tool also includes a spring having a spring force, a spring force retention device defining a perimeter having a gap and in mechanical communication with the component where the spring force retention device being configured to retain the spring force, and a gap member configured to be disposed in the gap. The tool further includes a force generator coupled to the gap member and in operable communication with the acoustic receiver and configured to operate in response to receiving the acoustic signal to withdraw the gap member from the gap to cause the spring force retention device to release the spring force thereby applying the spring force to the component.

Abstract: A hydraulic jar includes a tubular housing having central bore and an exterior. The housing includes a passage from the central bore to the exterior. A mandrel is axially movable within the housing, forming an annular space between the mandrel and the housing that includes a timing fluid. The mandrel includes an interior axial space that permits the flow of a drilling fluid. A timing device is fixed to the mandrel in the annular space. A trigger is capable of blocking the flow of drilling fluid through the axial space in the mandrel, and the mandrel moves axially in the housing when the trigger engages the mandrel. The timing device causes the mandrel to move at a first speed and at a second speed to create the impulse. The drilling fluid exits the central bore through the opening after the mandrel moves past the opening.

Abstract: Hydrocarbon wells that include interrogation devices positioned within a fracture and methods of monitoring at least one property of a fracture. The hydrocarbon wells include a wellbore that extends within a subsurface region and a fracture that extends from the wellbore. The hydrocarbon wells also include a plurality of interrogation devices entrained within a carrier fluid and positioned within the fracture and a downhole communication device positioned within the wellbore and proximal the fracture. The methods include flowing the interrogation devices into the fracture and conveying the excitation signal into the fracture. The methods also include receiving the excitation signal with the interrogation devices and generating a plurality of corresponding resultant signals with the interrogation devices.

Abstract: A polish analysis platform is disclosed. The polish analysis platform may receive a set of parameters for a proposed engine. The set of parameters may include: a quantity of hours of operation for the proposed engine, and a power output for the proposed engine. The polish analysis platform may determine an end of injection for the proposed engine based on the set of parameters. The polish analysis platform may generate a virtual instance of the proposed engine. The virtual instance may be configured with the end of injection. The polish analysis platform may simulate operation of the proposed engine using the virtual instance. Output of simulating the operation of the proposed engine may include a liner polish of a liner. The polish analysis platform may perform one or more manufacturing-related actions regarding the proposed engine based on the output of simulating the operation of the proposed engine.

Abstract: A system for use in performing a reverse cementing operation in a downhole well operation and creating a sectional separation within a well casing and a process completion indicator. The system comprising a well casing, and a magnetic element, and a plurality of magnetizable particles. The magnetic element is coupled with a radial, interior section of the well casing and the plurality of magnetizable particles couple with the magnetic element forming an impediment between a first and second section of the well casing. The impediment creates a detectable resistive force. The magnetizable particles and the at least one magnet form a contiguous and porous wall and the resistive force creates a pressure spike at a surface of the well in response to the interaction of a cement slurry pumped into an annulus of a wellbore and the wall.

Abstract: A system for cementing a wellbore having a casing string disposed in the wellbore is provided. The system includes a cement tool, a fiber optic cable, and a computing device. The cement tool is operable to be deployed down the wellbore through a casing string from a surface during cementing process of the wellbore. The cement tool includes a tool sensor. The fiber optic cable is coupled with the cement tool such that the fiber optic cable spans the wellbore from the cement tool to the surface. The fiber optic cable is communicatively coupled with the tool sensor. The computing device is communicatively coupled with the fiber optic cable and is operable to receive and process signals from the tool sensor via the fiber optic cable during the cementing process.

Abstract: A screen assembly includes a pipe forming a first passageway and a first plurality of passageways extending between internal and external surfaces of the pipe to define a first portion of the pipe; a tubular disposed about the first portion, wherein the tubular forms a second passageway and a second plurality of passageways extending between external and internal surfaces of the tubular; and a housing concentrically disposed about the tubular to form a chamber that is between the tubular and the housing and that is in fluid communication with a screen jacket exit. When in a first configuration, dissolvable plugs are accommodated within the second plurality of passageways to fluidically isolate the external surface of the tubular from the first passageway. When in the second configuration, the screen jacket exit is in fluid communication with the first passageway via the chamber and the first and second plurality of passageways.

Abstract: Disclosed is an integrated construction method of fracturing and tertiary oil recovery for low-permeability reservoir, including the following steps: dividing the target layer into several fracturing intervals; determining the amount of fracturing fluid required for the target fracturing interval; determining the flow rate of the target fracturing interval; determining the pumping construction procedure for the target fracturing interval; perforating the target fracturing interval; injecting oil displacement fracturing fluid into the target fracturing interval for fracturing construction; wherein the oil displacement fracturing fluid is a fracturing fluid to which an oil displacement agent is added.

Abstract: A system for cementing a tubular within a wellbore includes a connector; a tubular housing attached to the connector and disposed in the tubular; and a plug disposed in the tubular housing and releasably attached to the tubular housing.

Abstract: A degradable plug device for a pipe has an outer plug body and an inner plug for preventing fluid flow through the pipe until the inner plug has been removed from the outer plug body. The outer plug body and the inner plug are of a degradable material. The inner plug has a chamber with at least one port to the exterior of the inner plug. The exposed surfaces of the degradable plug have a protective layer thereon. The inner plug is disposable in at least a first position, in which the inner plug prevents the fluid flow through the pipe. The inner plug is adapted to undergo, in use, a degradation initiation operation such that fluid is able to enter the chamber via the at least one port to initiate corrosion or dissolution of the inner plug from inside the chamber.

Abstract: A method of preventing a rollover situation for an articulated vehicle, specifically in relation to the forward vehicle section of the articulated vehicle, is disclosed. A corresponding control unit and a computer program for such an articulated vehicle is also disclosed.

Abstract: Switchable cross-over systems, devices, and methods for cementing well walls are provided. A switchable cross-over device includes a tool body and a flow sleeve. The tool body includes a main tool path separable into uphole and downhole tool paths and an auxiliary chamber containing uphole and downhole annular ports. The flow sleeve is within the auxiliary chamber and movable between conventional and reverse circulation positions. In the conventional circulation position, the uphole and downhole tool paths are in fluid communication and the uphole annular port is in fluid communication with the downhole annular port through the auxiliary chamber. In the reverse circulation position, the flow sleeve forms first and second auxiliary flow paths in the auxiliary chamber, the uphole tool path and the downhole annular port are in fluid communication via the first auxiliary flow path, and the downhole tool path is in fluid communication with the uphole annular port.

Abstract: A system is for pressure testing a barrier in a well from below. The system has a first barrier, a second barrier located below the first barrier in the wellbore, a confined testing space located between said first and second barriers in the well, and a fluid reservoir. The system further has a pressurizing member for pressurizing fluid from said fluid reservoir and for transferring said pressurized fluid into said confined testing space, a pressure sensor for measuring pressure in relation to said confined space; and a pressure data receiver for receiving data from said pressure sensor. There is also described a method for pressure testing a barrier in a well from below.

Abstract: Methods for using cement compositions in subterranean formations are provided. In some embodiments, the methods comprise introducing a first treatment fluid comprising a first base fluid and a metal oxide into a wellbore penetrating at least a portion of a subterranean formation; introducing a spacer fluid into the wellbore that separates the first treatment fluid from at least a second treatment fluid; introducing the second treatment fluid into the wellbore, wherein the second treatment fluid comprises a second base fluid and a soluble salt; allowing the first treatment fluid to contact the second treatment fluid to form a cement mixture; and allowing the cement mixture to at least partially set.

Abstract: The invention relates to the decommissioning of hydrocarbon wells. It concerns the artificial promoting or inducing of creep in the overburden formation 3 surrounding an oil well 1, so that the formation rock 3 encroaches against the casing 5 to form a seal. This avoids the need to plug the annulus between the casing 5 and formation 3 with cement. The overburden may be caused to creep by reducing the pressure in the annulus, by applying heat to the overburden rock or by stressing the rock repeatedly to cause fatigue in the rock 3.

Abstract: Various embodiments of a tubular valve assembly for cement completion of wellbores and methods of using the tubular valve assemblies are provided.

Abstract: Apparatus and methods are provided for coupling a first component to a second component of a tool coupler. A first component includes a ring coupler having mating features and rotatable between first and second positions; an actuator to rotate the ring coupler between the positions; and a second component comprising a profile complementary to the ring coupler. A method includes inserting a central shaft of the first component into a housing of the second component; rotating a ring coupler around the central shaft; and engaging mating features of the ring coupler with a profile. A method also includes clamping a profile using the ring coupler and a second ring coupler. A method also includes moving a second ring coupler vertically relative to the housing to engage a profile.

Abstract: A sliding valve has a valve body, a sliding sleeve received in a longitudinal bore of the valve body, and a collet receivable in a longitudinal bore of the sliding sleeve. The valve body has one or more fluid ports on an uphole portion of the sidewall thereof. The sliding sleeve is movable between an uphole closed position closing the one or more fluid ports and a downhole open position opening the one or more fluid ports. The collet comprises a metal portion about an uphole end of the collet, and a ball seat having a ball-seat surface radially inwardly sloped from uphole to downhole at an acute slope angle with respect to a longitudinal axis of the collet. The metal portion is radially outwardly expandable under a radially outward pressure to form a metal-to-metal seal at the interface between the collet and the sliding sleeve when the collet is received in the sliding sleeve.

Abstract: The present disclosure describes methods and systems for downhole well integrity reconstruction in a hydrocarbon reservoir. One method for downhole well integrity reconstruction in a hydrocarbon reservoir includes: positioning, a laser head at a first subterranean location, wherein the laser head is attached to a tubular inside of a wellbore; directing, by the laser head, a laser beam towards a leak on the wellbore; and sealing the leak using the laser beam.

Abstract: A system for continuous determination of annulus pressure in subsurface wells comprises one or more electro acoustic technology sensor assemblies permanently installed in each annulus surrounding a subsurface well; and a fiber optic cable in close proximity to the electro acoustic technology sensor assemblies and in communication with a surface distributed acoustic fiber optic interrogator.

Abstract: An internal completion string is anchored within a closed casing valve of a production liner in a wellbore. The internal completion string comprises a packer and a shifting tool. The production liner comprises a casing valve having a port and a moveable member. The annulus defined between the production liner and the internal completion string is sealed, and the shifting tool is remotely operated to move the moveable member away from the port, thereby opening the casing valve.

Abstract: Methods, compositions, and systems that use swellable glass particles to reduce fluid flow in subterranean formations are included. An example method may comprise introducing swellable glass particles into a zone of a subterranean formation; contacting the swellable glass particles with a resin composition in the zone; and allowing the resin composition to harden in the zone whereby flow through the zone is reduced.

Abstract: A portion of a wellbore is drilled in a subterranean formation, using a drilling string (140) disposed within a casing string (130) and extending through a cement retainer (150) disposed within the casing string. The drilling string can be retracted into the casing string to a location fully above the cement retainer, and subsequently the casing string can be cemented in the wellbore whereby maintaining the drilling string inside the casing in the wellbore.

Abstract: An apparatus and method for preparing a casing of a subterranean well and injecting a sealing mixture therein. The apparatus comprises an elongate body extending between top and bottom ends connectable to a wireline at the top and having a plurality of nozzles extending therethrough proximate to the bottom. A plurality of scrapers within the body each have a first retracted position and a second radially extended position engageable with the casing. A cavity is operable to contain the sealing mixture and a piston is movable therein so to eject the sealing mixture through the nozzles. The method comprises positioning the body in the well at a location to be sealed, extending the scrapers to engage with the casing, displacing the body so to scrape against the casing and retracting the scrapers. The piston is displaced so to eject the sealing mixture through the nozzles.

Abstract: Described herein are methods of cementing at least a portion of a well comprising feeding a magnetorheological cementitious slurry to a well and applying a magnetic field to the magnetorheological cementitious slurry concurrent with at least a portion of said feeding step to cause a mechanical response in said magnetorheological cementitious slurry in the well. Also disclosed herein are methods of temporarily blocking at least a portion of a well comprising providing a magnetorheological fluid in a well, applying a magnetic field to cause a mechanical response in said magnetorheological fluid thereby blocking at least a portion of the well, and removing the magnetic field to unblock the portion of the well. Also disclosed herein is a magnetorheological cement.

Abstract: A test plug is proposed for inspecting the integrity of a cement plug or other barrier in an abandoned oil and/or gas production wellbore as well as its own sealing performance. The test plug employs a pair of expandable seals for sealing off an annular space between the seals, the plug and surrounding inner surface of the wellbore. Furthermore, it employs a pump for pumping fluid through a fluid channel traversing the plug into or from an intermediate wellbore section between the plug and the barrier. Valves are provided for closing the fluid channel after the pressure in the intermediate wellbore section has reached a selected level. Pressure gauges monitor a pressure in the intermediate wellbore section and in the annular space during a selected period of time. The monitored pressure is stored in a memory device and/or transmitted to a barrier and seal integrity monitoring display at the earth surface.

Abstract: A cementitious binder, includes a hydraulic binder in an amount in the range from 50 to 80% by weight of the cementitious binder; a first siliceous based material in an amount in the range from 0.5 to 35% by weight of the cementitious binder, the first siliceous based material having a (SiO2)/(Al2O3) ratio by weight greater than 2.5; a second siliceous based material in an amount in the range from 10 to 25% by weight of the cementitious binder, the second siliceous based material being different from the first siliceous based material and having (a) a (SiO2)/(Al2O3) ratio by weight greater than 10 and (b) a BET specific surface area greater than 5 m2/g; and an aluminum based material in the range from 0 to 10% by weight of the cementitious binder and having a (SiO2)/(Al2O3) ratio by weight lower than 2.5, wherein 0.09<AlEFF/(AlEFF+SiEFF)<0.

Abstract: A method for sealing perforation tunnels in a well includes steps of pumping an initial volume of fluid into the well, mixing expandable material into a carrier fluid to form an expandable fluid mixture, pumping the expandable fluid mixture into the well to force the expandable material into the perforation tunnels in the well, and holding the expandable material under a hold pressure in the perforation tunnels for a cure period to form perforation plugs.

Abstract: A method for casing a subsea wellbore includes running a tieback casing string into the subsea wellbore using a workstring including first, second, and third wiper plugs. The method further includes: launching a first release plug or tag into the workstring; pumping cement slurry into the workstring, thereby driving the first release plug or tag along the workstring; after pumping the cement slurry, launching a second release plug or tag into the workstring; and pumping chaser fluid into the workstring, thereby driving the release plugs or tags and cement slurry through the workstring. The release plugs or tags engage and release the respective wiper plugs from the workstring. The first wiper plug or release plug ruptures, thereby allowing the cement slurry to flow therethrough. The method further includes: stabbing the tieback casing string into a liner string; and retrieving the workstring, the workstring still including the third wiper plug.

Abstract: Methods and systems to initiate downhole operations in a borehole include deploying a first structure at least partially in the borehole, moving a second structure at least partially along the first structure, wherein at least one of the first structure and the second structure is equipped with a sensor and the other of the first and second structure is equipped with a marker detectable by the sensor, detecting a critical event that is related to an interaction of the sensor and the marker, measuring a time-since-critical event, determining a time delay based on the time-since-critical event, transmitting, with a telemetry system, data from the earth's subsurface to the earth's surface indicating that the critical event has been detected, and initiating a downhole operation by using the determined time delay.

Abstract: A system for offline suspension of a tubular including a first well having a first wellbore and a cellar formed at the surface of the first well with a rig movable from the first well to a second well. Additionally, a tubular string extending into the first well and a tubular support structure above the cellar of the first well, wherein the tubular support structure supports a weight of the tubular string such that the tubular is suspended from the tubular support structure independent from the rig and through a securing equipment configured to secure the first well.

Abstract: Disclosed embodiments include a retrievable bridge plug assembly. The retrievable bridge plug assembly includes a sealing element that is elastically deformable to expand radially outward when the sealing element experiences axial compression and at least one anti-extrusion device positioned downhole from the sealing element. The at least one anti-extrusion device includes a shoulder that in operation maintains contact with the sealing element. Also included in the at least one anti-extrusion device is a plurality of anti-extrusion petals positioned downhole from the shoulder that expand radially outward from the anti-extrusion device. Additionally, the at least one anti-extrusion device includes an expandable sleeve surrounding the plurality of anti-extrusion petals that covers extrusion gaps of the plurality of anti-extrusion petals when the plurality of anti-extrusion petals expand radially outward from the anti-extrusion device.

Abstract: A borehole tool, having a cylindrical body, the cylindrical body having an upper shank, a lower shank, and a component tool disposed between the upper shank and the lower shank, wherein the tool is configured to have an outer surface airfoil configuration, whereby lift is created as fluid passes along the cylindrical body. The component tool can be a combination stabilizer tool, a reamer tool and a cutting removal tool, wherein the stabilizer tool is configured as a helical stabilizing blade and reamer blade, a flow path disposed between the helices of the stabilizing and reamer blade, the stabilizing and reamer blade further comprising a reamer cutting element disposed where an edge of the stabilizing and reamer blade meets the flow path.

Abstract: A sidetracking assembly employs a running tool for engaging the whipstock. A cement tube flows low-viscosity fluid through the whipstock to set a hydraulically actuable anchor and to transmit fluid cement further downhole in order to set a cement plug. A latch dog releasably associates the running tool with the whipstock. The latch dog disengages the running tool from the whipstock after the anchor is set. The running tool and cement tube can be raised a designed distance using a first pull tension, indicating that the cement tube is not restrained and that therefore an operation to pump cement to form a cement plug below the assembly may be executed. Following the cementing operation, a greater pull tension can be applied to release the cement tube from the whipstock, permitting complete withdrawal of the reusable running tool and cement tube from the wellbore.

Abstract: A system and method for isolating a zone in a wellbore having a sand screen including applying hydrogel into an annulus between the sand screen and the geological formation to form a hydrogel packer in the annulus.

Abstract: A non-metallic centralizer for use with downhole operations. The centralizer is formed of a hollow, cylindrical body, a plurality of non-metallic blades protruding from the outer surface of the cylindrical body, and a plurality of wear buttons positioned on each of the plurality of blades, each of the wear buttons having a surface designed to reduce grabbing or sticking and wear of the hollow cylindrical body.

Abstract: A wellbore liner-hanger tie-back system includes a bore receptacle coupled with a liner hanger at a downhole end of the bore receptacle, where the liner hanger is configured to be positioned in a wellbore, a tieback casing configured to be disposed in the wellbore, where a portion of an outer surface of the tieback casing is disposed proximate to an inner surface of the bore receptacle, and a seal system including at least one swellable seal. The seal system is disposed between the tieback casing and the bore receptacle to seal a space between the portion of the outer surface of the tieback casing and the inner surface of the bore receptacle.

Abstract: Systems and methods for moving a tubular string within a subterranean well include a collar tool assembly that has a tubular body. The tubular body has an inner bore that is in fluid communication with an inner bore of the tubular string. An outer cavity is located radially outward of the inner bore. An injection port assembly extends from the outer cavity to an outer diameter surface of the tubular body and can move between an injection port closed position and an injection port open position. A hydraulic system can force a treatment fluid of the outer cavity out of the tubular body when the injection port is in the injection port open position. An injection port programmable logic controller is in signal communication with the hydraulic system and can command the injection port assembly to move between the injection port closed position and the injection port open position.