Abstract: A formation fluid sampler adapted to be disposed in a wellbore includes a full bore and an outer housing. The outer housing includes an annular sample chamber having a first port disposed on one side of the chamber and a second port disposed on the other side of the chamber. The annular sample chamber further includes a fluid sample parameter transducer adapted for measuring a parameter of the fluid sample trapped in the annular sample chamber, and an EPROM memory for instantly storing the parameter measured by the transducer when the sample was initially taken by the sampler. The sampler also includes a piston disposed within the outer housing and adapted to move axially in the sampler in response to an annulus pressure around the sampler.

Abstract: An improved module and assembly for sampling liquids and gases within the ground is characterized by module housings containing sampling cavities having lateral openings to the exterior of the housings. Within each lateral opening a removable insert and piston assembly is provided. The piston is displaceable between open and closed positions within the insert in response to changes in pressure from pressure and vacuum sources. When in the closed position, the piston and insert are flush with the exterior of the housing to prevent contaminants from accumulating at the opening. When the module is inserted to a desired depth in the ground, the piston is displaced to the open position and samples from the soil at the desired depth enter the sampling cavity.

Abstract: The invention discloses a multiple sample annulus pressure responsive sampler which allows the collection of samples at different time intervals and at different depth intervals in a wellbore. In one embodiment, the tool contains cylindrical housing means, a power piston, means for biasing the power piston, an oil case, an air case, valve means, valve activation means, and means for sampling the well fluid. In a second embodiment, the valve activating means includes energizing means for energizing an electric motor. In a third embodiment, a rupture disc is used in order to axially move the power piston.

Abstract: A water pressure cleaning assembly useful in cleaning out the perforations in a well casing includes a mandrel structure defined by an upper cylindrical segment and a lower conical segment. An upper and lower annular seal is movable respectively along the upper and lower segments to allow relative motion of the mandrel structure within the annuli thereof. This lateral motion then allows the passage of the assembly across irregularities in the casing.

Abstract: A sample bottle makes it possible to sample mixtures of water and gases in deep bore or drill holes. The filling of the volume (4) of the bottle is obtained by placing a volume (4) under a vacuum beforehand. Once in place, the pipe (10) is opened by withdrawing the piston (20) and opening the valve (6). Once the pressures balance, the valve (6) closes again and the piston (20) is reintroduced into the sleeve (8). Pressure compensation is provided by a sliding valve member (46). Emptying takes place by means of the tap (24), which is also initially used to place the volume (4) under a vacuum. The sample bottle is applicable to geothermy, nuclear power stations, oceanography and geochemistry.

Abstract: A downhole tool apparatus includes an operating mechanism and a hydraulic timer. The hydraulic timer is operably associated with the operating mechanism for providing a time delay prior to operation of the operating mechanism. The hydraulic timer includes a fluid flow restriction and a spring biased piston which pushes a predetermined volume of hydraulic fluid through the fluid flow restriction.

Abstract: A well fluid sampling apparatus provides a time delay after actuation of the tool and before a sample is taken. The tool is operated by well pressure acting on a piston. The piston is initially hydraulically blocked so that it cannot move. The time delay is provided after the piston begins moving. Additional time delay devices can optionally be included.

Abstract: In accordance with an illustrative embodiment of the present invention, a gas lift valve that is latched by a latch assembly into a seating bore in a side pocket mandrel includes a guide flange that is recieved in a slot in an internal wall of the mandrel. The guide flange functions to precisely rotationally orient and to stop the insertion of the valve within its seating bore such that a lateral gas outlet port in the valve body is directed inward toward the main bore of the mandrel. A frictional restraint also is provided to prevent accidental release of the latch assembly.

Abstract: In a downhole staging apparatus for delivering fluidized cement sequentially into two levels of substrate which enclose a wellbore casing. Said apparatus comprises a primary cement discharge port, and one or more secondary or lateral cement discharge ports. A sleeve is operably carried in the apparatus, being adjustable to close the secondary lateral port when a cementing operation is completed. A sleeve actuating tool is cooperative with said cementing apparatus, being remotely operable to close the lateral cement discharge port to assure that no communication exists between the cementing apparatus and the wellbore after the cementing operation is completed.

Abstract: A delayed opening fluid sampling tool comprises a body having three chambers and a port defined therein. The tool also comprises a metering device which is disposed in the body between two of the chambers, one of which chambers is for holding a metering fluid and the other of which is for receiving fluid which is transferred through the metering device. The tool further comprises a valve which is disposed in the body between the port and the remaining chamber, which remaining chamber is for receiving a well fluid sample. The valve is moved relative to the body in response to pressure acting on the valve through the port. Only after a predetermined time delay after the pressure begins moving the valve is the valve positioned to communicate the port with the sample-receiving chamber.

Abstract: A column of high density well treatment composition in liquid or solid form is stored in the bottom portion of the well bore of a producing fluid well and is subjected to fluid pressure from the well fluid. The flow of production fluid is used to create a pressure differential between the treatment composition and a treatment fluid injection outlet, thereby causing the treatment fluid to flow through the injection outlet. By locating the outlet in the flow of production fluid, the resulting flowing pressure drop creates the necessary differential pressure. The rate of flow of treatment fluid is metered by a capillary tube at the outlet or by a flow-actuated positive displacement pump. In all but one of the embodiments, the inlet of the conduit is at the bottom of a column of treatment liquid and at the top of a column of treatment solids. In another embodiment formation, fluid percolates up through a bed of solid treatment particles and into the well bore.

Abstract: An oil well tool for in situ release of treatment fluid into an oil well is disclosed. A tubular body is insertable into an oil well casing, which tubular body carries a bladder containing treatment fluid. The body is closed at a lower end and has at an upper end a fishing neck connector. A weight slideable within the tubular body compresses the treatment fluid within the bladder and forces the treatment fluid under a constant pressure through a fluid passageway. The size and length of the fluid passageway, combined with the pressure applied and viscosity of the treatment fluid, dictate the flow rate at which the treatment fluid is deposited into the oil well. The treatment fluid mixes with other fluids being circulated through the well formation. The primary purpose for the treatment fluid is to inhibit scale buildup and corrosion. This is accomplished by slow release of the treatment fluid over an extended period of time.

Abstract: A well fluid sampling apparatus for sampling fluids from a formation reservoir in a wall. The sampling apparatus comprises a body portion defining a large sampling chamber therein and at least one sampler module disposed in the sampling chamber. The sampler module is adapted for separately entrapping a volume of fluid as the sampling chamber fills. A sliding sampler valve is moved to open a sampler port allowing formation fluid to enter the sampling chamber. The sampler module has a metering piston therein which automatically closes after a predetermined volume of fluid has entered a sampler module chamber defined in the sampler module. The metering is accomplished by a chamber filled with a viscous liquid which must be discharged through a small orifice as the piston moves in response to fluid pressure in the sampling chamber. The viscous fluid is discharged into an air chamber.

Abstract: A system for controlling the flow of injection fluids and production fluids between a wellbore and one or more zones in a subterranean formation including an elongated tubing string extending within the wellbore and having one or more tubular ported mandrels interposed in the tubing string. Retrievable sleeves are insertable through the tubing string for registration with the mandrels in predetermined longitudinal and rotational positions as determined by a no-go shoulder on the mandrel and cooperating keys and key slots formed on the sleeves and the mandrels, respectively. The sleeves include removable orifice plugs which may be sized to control the flow of fluid through the sleeves between the tubing string and the wellbore. The sleeves are wireline insertable and retrievable so that changes in fluid flow control characteristics may be selectively carried out without pulling the tubing string from the wellbore.

Abstract: A downhole steam sampler for collecting the liquid phase content of a steam flow, immediately prior to the latter being injected into a substrate surrounding a hole or well. A reservoir within the sampler separates and retains the liquid phase while permitting the vaporous phase to pass. Detent means cooperates with a pair of spaced apart flow control valves to permit said valves to be closed simultaneously when the steam sampling operation is completed. The detent means is actuated in response to withdrawal of the sampler from the well, an action which displaces an externally positioned sleeve.

Abstract: A wellbore fluid sampling apparatus includes an elongated tubular housing having a floating piston disposed therein and dividing a bore in the housing into first and second chambers, one of the chambers being in communication with ports in the sidewall of the housing for receiving a sample of wellbore fluid in response to movement of the piston to enlarge the one chamber. The other chamber is charged with a liquid to prevent displacement of the piston until a control valve in the housing allows charging fluid to escape into a reservoir chamber whereby the piston moves to receive the fluid sample under wellbore pressure. The floating piston actuates a rod connected to a closure member to close off the bore in the fluid sampling chamber when a suitable fluid sample is obtained. A detent locks the actuating rod and the closure member in the closed position to capture the fluid sample for retrieval and analysis.

Abstract: An apparatus and method of operation for the release of concentric tubing strings used in well operations. In the preferred embodiment, the apparatus includes a tubing release assembly and an air chamber assembly as an actuating tool. The tubing release assembly comprises a housing, release sleeve, adjustment nut, pull tube mandrel, pull tube adapter, pull tube latch and retainer ring. The air chamber assembly as an actuating tool comprises a lower end plug, a housing, a housing retainer, seal element assembly, upper and lower shear pin retainers, upper element cone, release ring, setting mandrel, upper end plug, retrieving mandrel, and match drill assembly. Alternately, the tubing release assembly may be actuated by a ball and increased fluid pressure level within the interior of the tubing release assembly.

Abstract: Equipment for depositing processing products in wells after being lowered inside production tubes for depositing cement to seal perforations in the production tube and also for depositing detergents or acid.A syringe comprises a clock mechanism which, after a given period of time and through the medium of a striker for piercing a cap which seals a pressurized oil reservoir, actuates a hydraulic bolt comprising a barrel, a piston, a fixed liner encased in a movable liner and means for maintaining the movable liner in a raised position.A central rod rigid with the movable liner traverses a syringe body, of which the filling space is provided with discharge orifices co-operating with a valve carried by the end of the central rod.

Abstract: An improved wireline operated oil well dump bailer includes an elongated tool body having a longitudinal bore that extends through the tool body, the bore including a chamber section for carrying cement. A port through the tool body provides fluid communication between the tool bore and the oil well bore. A piston is slidably movable within the tool body between a first position in which the piston seals the port and a second position in which the piston is spaced from the port so that well bore fluid pressure can enter the tool body through the port and communicate with the piston. A trigger carried by the tool body, preferably in the form of an explosive charge which can be activated using the wireline moves the piston away from the first position to the second position so that the well fluid pressure enters the bore and powers the piston to dispense cement from the cement carrying chamber section.

Abstract: An apparatus for extracting a virgin fluid sample from a selected formation of subterranean well comprises an outer tubular housing disposed between two packing elements straddling the selected formation and having radial ports communicating with the annulus adjacent the selected formation. A hollow mandrel extends entirely through the length of the tubular housing, and the lower portions of such mandrel cooperate with the bore of the internal tubular housing to define a sample-collecting chamber. Fluid passage from the radial ports to the collecting chamber are blocked in the run-in position of the apparatus by an axially shiftable valve sleeve, which is shear pinned in a flow-blocking position during run-in of the tool. Fluid pressure is then applied to the bore of the hollow mandrel to shift the valve sleeve upwardly and remove the valve sleeve from its flow-blocking position, thereby permitting flow from the radial ports into the sampling chamber.

Abstract: A dump bailer is lowered on a wireline in a well through tubing for placing a cement slurry on a retainer located in the well. The dump bailer has a weight bar assembly that includes upper and lower sections that are extensible relative to each other. The upper weight bar section has an electrical contact that engages the electrical contact mounted in the upper end of the housing of the dump bailer. The lower section has a seal which separates the housing into upper and lower chambers. Cement is pumped in from the bottom, pushing the weight bar assembly upward until the contact on the upper weight bar section engages the upper contact. A detonator is located on the bottom of the lower weight bar section. Explosive force of the detonator transmits a shock wave through the cement slurry to expel a shear plug located on the bottom of the housing. The weight bar assembly pushes the cement from the slurry once this occurs.

Abstract: An apparatus for taking a sample of formation fluid and obtaining temperature and pressure data when the apparatus is lowered into a well casing or pipe string, said apparatus comprising: a sampling device; a gun perforator; two packers, one positioned above and the other positioned below the sampling device; and valves carried by the sampling device.

Abstract: A device and method are set forth to obtain a ground water sample. The device includes a drive cone adapted to penetrate the ground and a main body having a closed sample chamber. The main body is movable relative to the cone between the first position where the body and cone abut for inserting the device into the ground and a second position where the cone is frictionally restrained by the ground and the body is withdrawn upwardly relative to the cone to expose a sampling tube. The tube including a plurality of openings to receive ground water into the chamber. After receiving the sample, the device is retrieved from the ground.

Abstract: In the representative embodiments of the new and improved apparatus disclosed herein, a string of full-bore well tools are arranged to be suspended from a pipe string in a well bore penetrating an earth formation in flow communication with the well bore. A full-bore packer coupled to the pipe string is operated from the surface for isolating the well bore interval below the packer from the fluids in the well bore thereabove. To test the formation, a test valve coupled to the pipe string is selectively operated from the surface for opening the pipe string to the flow of formation fluids from the isolated well bore interval. Thereafter, when it is desired to obtain a sample of the formation fluids flowing in the pipe string, the new and improved full-bore sample-collecting apparatus coupled to the pipe string is selectively operated from the surface to admit the fluids in the pipe string into an annular sample chamber within the new and improved apparatus.

Abstract: The invention relates to a device for injecting a liquid product, at a low flow rate, into the bottom of a hydrocarbon-producing well. The device comprises an injection valve and, above the injection valve, at least one settling tank through which the liquid to be injected must pass before arriving at the injection member.

Abstract: Apparatus and methods are provided for taking a sample of a fluid in a well. The apparatus comprising a housing, a telescoping sampler assembly having a sleeve valve therein, an actuating mandrel and a time delay fluid control device which controls the opening of the sleeve valve. The method of operation of the sampler comprising evacuating the sample chamber of the sampler assembly, lowering the sampler assembly into a well, and collecting a fluid sample by flowing fluid into the sampler assembly from the well by opening and closing a sleeve valve in the sampler assembly utilizing a continuous sliding movement.

Abstract: An intake port assembly includes a top port assembly adapter, a port adapter, a seal mandrel, a spacer connector, and a lower port assembly adapter, all of which are threadedly connected together. A flow passage is disposed in the intake port assembly for flowing a well fluid from a well bore located about the intake port assembly to an apparatus located above the intake port assembly. The intake port assembly also includes an inflation passage for communicating an inflation fluid under pressure from an upper end of the intake port assembly to the lower end of the intake port assembly, and includes a bypass passage for communicating well fluid from the upper end of the intake port assembly to the lower end of the intake port assembly.

Abstract: A tool for housing a magnetic directional survey instrument for inserting the instrument into a deviated well bore. Means are provided on the tool for circulating well fluids past the tool while it is in the well bore. There is provided means, connectable on the tool, for centering the tool in the vertical, as well as the deviated portion of a well bore.

Abstract: A dispenser for well treating chemicals for pumping oil wells, for attachment to the bottom end of the tubing string, comprises a long cylindrical container, closed at top and bottom, about the same diameter as the tubing and rigidly attachable to the bottom end of the tubing. The bottom end of the chamber is preferably pointed, with at least one opening in the bottom end. The chamber is filled with chunks of solid chemical, of a nature normally used for treating wells. In the normal pumping action, the weight of the well fluid filling the tubing to the surface is supported by the sucker rods during that part of the pumping cycle when the rods are moving up. When the rods are moving down, the weight is carried by the tubing. This varying load on the tubing causes it to lengthen under load, and shorten, so that the bottom end of the tubing raises and lowers through a range of a foot or more.

Abstract: A wire line well tool is connected to a fluid gun which is run into the hole along with the tool. Should the tool become stuck, the gun is actuated, e.g. electrically, to direct mud active fluid around the stuck tool and the inside of the well bore, to destroy the pressure imbalance about the tool and to exert a radial force pushing the tool toward the center of the hole to free same.

Abstract: A well, such as an oil well, may be plugged, on command, from the well head, by activating a plurality of preplaced motor-driven, foam generating capsules causing a foam to be generated and forced into the well hole where it hardens.

Abstract: A junk basket having a housing with cutting means on the lower end thereof and junk retaining means supported within the housing, a valve assembly mounted within the housing above the junk retaining means and including a tubular valve housing valve means for controlling flow through the valve housing, pressure responsive operating means for actuating the valve means whereby the valve means is moved between open and closed positions responsive to the stopping and starting of the flow of drilling fluids through the housing, means providing circulating of fluid through the valve housing and the basket housing when the valve means is closed, cam means for supporting the valve means in open position in one position of the cam means and releasing support from the valve means to allow it to close in a second position and stepping means for actuating the cam means between its first and second positions responsive to the starting and stopping of flow of drilling fluid through the housing.

Abstract: An elongated body member, a portion of which forms a chamber for retaining samples of the liquid and steam contents of a geothermal well. A fluid tight seal is formed between an O-ring and a parallel sealing face of a slidable shaft member. The pressure sealing force is adjustably controlled by a spring assembly. The spring assembly is adjusted so that the sealing force must be overcome before a sample is taken. When the sealing force exerted upon the seal is overcome, the sample chamber is placed in fluid communication with the geothermal borehole by a series of passages which include grooves or slots contained in the slidable shaft member. After sampling is complete the seal is reformed allowing the sampler to be retrieved to a surface location.

Abstract: A well logging instrument has a fluid chamber at its lower end and a plurality of controlled flow orifices leading from the chamber to the exterior of the instrument. A piston within the chamber, having a spring at its upper end, forces a friction-reduction agent from the chamber through the flow-controlled orifices into the earth borehole to facilitate the movement of the well logging instrument through the borehole. The upper portion of the fluid chamber, above the piston, is also ported to the fluid within the borehole to equalize the pressure across the piston. In an alternative embodiment of the invention, the acceleration of the borehole instrument creates a velocity signal which is compared with the velocity of the logging cable at the earth's surface and upon a sufficient difference in velocity, the friction-reduction agent is caused to be ported into the earth borehole.

Abstract: Two methods and a steam sampler are disclosed for sampling steam, as at any desired depth in a steam injection well for determining the quality of the saturated steam just prior to penetrating the formation. The sampler comprises an elongated cylindrical vessel with a tube having openings extending longitudinally internally of the vessel for forming an annulus between the vessel and the tube for trapping steam water droplets while ejecting the steam vapor. The tube has a suitable number of staggered perforated baffles thereon for closing the top of the annulus for preventing loss of the water droplets due to vapor flashing when pressure is bled off for recovery at the surface. A method for sampling and a method for forming a sampler are disclosed. Thus, a simpler, stronger sampler with no moving parts and new and improved methods are disclosed.

Abstract: A carrier and contained well instrument which are light enough to float in the fluid in a well are forced downwardly in the well to a predetermined test zone by downward movement of the fluid. After performance of a testing operation by the instrument, the buoyant carrier and instrument are permitted to float upwardly within the fluid to the surface of the earth for retrieval.

Abstract: A sampling vessel, adpated particularly for use in geothermal bores, constructed principally of stainless steel and opened at depth without ancillary means such as messengers by causing an inertial mechanism to break a frangible seal.

Abstract: Method and apparatus for bottom hole testing in producing or injection wells under pressure employing a tool adapted to be lowered on a flexible line to sampling depth in a well, the tool including a first section containing a closed sample chamber detachably connected to a second section containing time delay fluid escapement means operable to maintain the closed condition of the chamber until the sampling depth is reached and to then cause entry of a well fluid sample to the chamber followed by its closure to retain the sample and preserve the well pressure at the sampling location, the method including withdrawing the tool from the well, disconnecting the sections to recover the sample chamber independently of the second section, and transferring and opening the chamber for testing of its well fluid content.