Abstract: A wellbore plunger retrieving tool including a substantially cylindrical retrieving plunger body having a reduced diameter top end and an opposed bottom end. The body bottom end has a threaded recess. A plunger receiving collet includes a threaded male top end engageable with the threaded recess and an opposed bottom end with a plurality of extending fingers. The fingers are capable of flexing to engage a downhole stuck plunger.

Abstract: An apparatus for use in manipulating an eccentrically located well bore device. One embodiment of the apparatus comprises: a main body attachable to a conveyance member; an arm hinged to the main body; a lock assembly for selectively retaining the arm in a locked position and releasing the arm from the locked position; a kick over assembly for moving the arm to kicked over position; and an adapter connected to the lift arm, the adapter connectable with a tool for latching onto the device. The kick over assembly comprises a kick member operatively connected to the arm and a biasing member having a first end connected to the arm and a second end connected to the kick member.

Abstract: The present invention discloses a full reservoir sampling and testing apparatus having a ground surface testing and controlling tool (36) and a downhole tool (1), the downhole tool (1) comprises a wireline bridle (21), an adapter joint AH64 (2) connected to the wireline bridle (21), a GR pup joint, an electric unit (4), a single probe unit (5), a pumping unit (6), a dual packer unit (7), and a multi sampling unit (8); the ground surface testing and controlling tool (36) comprises a power supply controller, a computer system and a relevant control, analysis and interpretation software; an upper portion of the pumping unit (6) is connected to the single probe unit (5) and a lower portion thereof is connected to the multi sampling unit (8).

Abstract: An apparatus for discharging sample fluid from a bailer with a ball-joint and a method of using thereof. The apparatus has a body, an interior and an exterior, a top opening and a bottom opening, and a lip disposed around the top opening. The bottom of the apparatus has a bailer-support disposed across the diameter of the bottom opening. A pin is located at the center of the bailer-support. The apparatus functions as a bailer discharge device. The apparatus is designed to be placed into an opening of a bucket or drum and is adapted to discharge sample fluid from the base of a bailer into a bucket or drum when the bailer with a ball-joint is inserted through the top opening of the apparatus and rests on the pin attached to the bailer-support support. The pin acts to release the ball-joint thereby allowing the sample fluid to be discharged into the bucket or drum.

Abstract: The present invention generally provides a method and apparatus for injecting a compressible fluid at a controlled flow rate into a geological formation at multiple zones of interest. In one aspect, the invention provides a tubing string with a pocket and a nozzle at each isolated zone. The nozzle permits a predetermined, controlled flow rate to be maintained at higher annulus to tubing pressure ratios. The nozzle includes a diffuser portion to recover lost steam pressure associated with critical flow as the steam exits the nozzle and enters a formation via perforations in wellbore casing. In another aspect, the invention ensures steam is injected into a formation in a predetermined proportion of water and vapor by providing a plurality of apertures between a tubing wall and a pocket. The apertures provide distribution of steam that maintains a relative mixture of water and vapor.

Abstract: An air-tight bailer is filled completely and closed at its open upper end with a flat cap so that no ambient air is trapped in the bailer. A mounting member to which a rope is secured for lowering and lifting the bailer is recessed with respect to the open upper end of the bailer so that it does not interfere with the cap. A disc-shaped protuberance formed on the bottom of the cap fills the recess. An annular groove around the recess receives the rim of the open upper end to enhance an air-tight seal between the cap and the open upper end. In a first embodiment, the bailer is emptied by piercing a thin membrane formed in the cap with a spout device having a trailing end in fluid communication with a container. A second embodiment eliminates the membrane and the spout device.

Abstract: A well pressure control assembly includes an annular pressure containment structure useful for manipulating pipe during drilling and other well operations performed with annular pressure at the wellhead. The annular pressure containment structure includes a sealing structure involving a sealing wall and a fluid port extending through the sealing wall through with a hydrodynamic bearing fluid is injectable adjacent pipe received in the annular pressure containment structure.

Abstract: An apparatus and method for increasing the permeability of a productive oil formation, comprised of desensitized detonating cord with a plurality of steel sleeves thereabout, functioning as pressure compensators, disposed at pre-determined distances along the detonating cord to produce sequential pulse/delays upon ignition of the detonating cord. A high-pressure detonator ignites detonating cord. A protective shield, mounted about the detonator, reduces the explosive force, while preserving the kinetic energy effectuated by the detonator. An external plastic tube, arranged adjacent to the detonating cord, is filled with production enhancing chemicals, which are propelled through clogged perforations and stimulate the surrounding formation, thereby increasing transmissibility of a productive oil formation. A weight and Sample/Junk basket to retrieve materials after the process are mounted to the bottom of the apparatus. A 0.092 diameter support wire serves as the back-bone of the entire apparatus.

Abstract: A method and an apparatus for injecting a fluid into a borehole. The method includes the step of injecting an injection fluid into a primary injection zone in a borehole at an injection fluid pressure. The primary injection zone is bounded by a proximal injection zone interface and a distal injection zone interface. The proximal injection zone interface and the distal injection zone interface are maintained at pressures which are substantially balanced with the injection fluid pressure. The apparatus includes a body adapted for passage through a borehole, at least four radially extendable and retractable zone interface elements spaced longitudinally along the body which when extended define at least three zones along the body, a zone interface element actuator for selectively extending and retracting the zone interface elements, and a fluid delivery system for delivering a fluid to each zone.

Abstract: In downhole apparatus for an oil well, components (26) are installed in tubes (28) received in a space defined between an outer case (20) and an inner length of cylindrical production column (24) that is eccentric relative to the case (20). Each tube (28) is fixed at one end to an interconnection box (30) that is also received in said space, and that has electrical conductors passing therethrough. The tubes (28) are fixed to the box (30) by welding, and the ends of the tubes remote from the box are closed by plugs that are welded on.

Abstract: A wellhead assembly including a towable oil lift system, a drum, a wireline spooled on the drum, and a level wind mechanism is set forth to extend the wireline into and out of a well casing for production of a well. The wireline spools over a measuring wheel and extends into the well and supports a bailer on the end of the wireline. The bailer has a foot valve for filling, thereby enabling retrieval of a bailer into a surface located seal assembly connected with an air pump to force liquid from the bailer. A control system enables cyclic operation.

Abstract: A bailer having a slow rate of descent into a liquid body to minimize agitation. In a first embodiment, a plug closes the upper end of the bailer and a perforation is formed in the plug. Air in the hollow interior of the tubular main body of the bailer is constrained to flow through the perforation as the bailer fills. A back pressure created by the air prevents rapid descent of the bailer and thus prevents rapid filling of the bailer. When the bailer is being emptied, the perforation prevents a vacuum from forming in the space below the plug and above the liquid level, but it provides a partial vacuum and therefore slows down the rate of flow of the liquid as it exits the bailer. Covering the perforation with a thumb creates a vacuum above the liquid level and stops the flow of liquid from the bailer. This eliminates the need for a tool that unseats the valve of the bailer from its valve seat.

Abstract: The present invention relates to a gas lift valve for use in an oil well producing by means of gas lift, said gas lift valve making use of a central body venturi for both controlling the flow of the injection gas from the annulus between the tubing and the casing of the oil well, and precluding a reverse flow of fluids from said oil well towards said annulus to occur.

Abstract: A downhole tool and method of operation is described for collecting fluid samples in a downhole environment. The tool is connectable on a work string and is activated by dropping a ball through the work string. On activation a sleeve arranged on the body of the tool is caused to shift from a first to a second position thereby creating a chamber between the sleeve and body. The sample fluid is drawn into the chamber as it is created and is prevented from exiting by a non-return valve. The tool locks the sleeve in the second position to fix the chamber. The sample can then be retrieved along with the tool.

Abstract: A multi-stage liquid elevator which is assembled from individual stages is disclosed. Each elevator stage is fabricated from ordinary pipe components and has no moving parts. When inserted into an natural gas well, the elevator is powered by the gas pressure available in the well. Each elevator stage consists of a reservoir defined by a casing enclosing an inlet pipe and an outlet pipe. At each stage, the liquid and gas from the previous stage are forced into the inlet pipe and the liquid collects in the reservoir until enough gas pressure builds up in the stage to force the liquid up the outlet pipe to the next stage. A coupling connects any two stages of the elevator together. As many stages as required can be joined together to construct a multi-stage liquid elevator of any desired length. Each stage is fabricated to a length compatible with the available gas pressure.

Abstract: A well, such as a natural gas well, may be treated to increase production of gas by inserting into the tubing string a water soluble carrier containing a well treating chemical adapted to aerate fluids standing in the tubing string. The dissolvable carrier contains a compressed swab adapted, upon dissolution of the carrier, to expand to fill the diameter of the tubing string, and well treating chemicals adapted to aerate the standing fluid in the well above and below the swab. The presence of the aerating fluids in the well lighten the hydrostatic head, permitting a plug of fluid above the swab to be displaced from the well as the swab is urged upward due to pressure exerted on the swab by the formation and by the aerating effect of well treating chemicals released below the swab.

Abstract: A non-flashing fluid sampler for use in obtaining a well fluid sample. The sampler comprises a body defining a first chamber, a second chamber, a third chamber and a sampling port therein. The sampling port is in communication with the first chamber and with an outside zone outside the body. The second and third chambers are initially isolated from one another by a control valve. Upon activating the control valve, fluid may flow from the second chamber to the third chamber through a flow restriction. An extendable floating piston is disposed between the first and second chambers, and the floating piston defines a variable volume therein. An initial amount of well fluid flows into the variable volume, thus trapping dirty fluid, and subsequently, a well fluid sample is flowed into the first chamber. An isolation valve is provided for allowing hydrostatic pressure into the sampler after the fluid sample has been taken.

Abstract: A sand-capturing tool is disclosed, as well as a method. The tool relies on an eductor. The eductor is supplied by pumped fluid from the surface through a coiled tubing support for the tool. The eductor induces flow into a central tube in the tool which brings in with it the sand to be captured. Ultimately, the cross-sectional area of the induced fluid flow is increased to reduce its velocity and to further induce the sand which has been brought through the narrow inner tube to drop out into an annular area around the inner tube. The clean fluid exits through a screen and goes around the eductor and uphole to the surface. In an alternative embodiment, the assembly can be supported on an electric line employing a downhole pump which provides the motive fluid force for the eductor jet. In this embodiment, the remaining operation is the same.

Abstract: A non-flashing fluid sampler for use in obtaining a well fluid sample. The sampler comprises a body defining a first chamber, a second chamber, a third chamber and a sampling port therein. The sampling port is in communication with the first chamber and with an outside zone outside the body. The second and third chambers are initially isolated from one another by a control valve. Upon activating the control valve, fluid may flow from the second chamber to the third chamber through a flow restriction. An extendable floating piston is disposed between the first and second chambers, and the floating piston defines a variable volume therein. An initial amount of well fluid flows into the variable volume, thus trapping dirty fluid, and subsequently, a well fluid sample is flowed into the first chamber. An isolation valve is provided for allowing hydrostatic pressure into the sampler after the fluid sample has been taken.

Abstract: A bailer has two externally-mounted weights. The first weight is positioned at the uppermost end and the second weight is positioned at the lowermost end of the bailer. The combination of weights increases the insertion rate of the bailer into a liquid so that the time elapsed for an insertion is reduced relative to the time required to insert unweighted bailers, top-weighted bailers, or bottom-weighted bailers. The weights also prevent wobble about the longitudinal axis of the bailer as it descends. The external mounting of the weights further prevents contamination of the liquid collected by the bailer and eliminates back pressure and turbulence caused by interior weights.

Abstract: A sand removing apparatus which is intended to be used in the lower area of underwater wells and is suspended from the end of a pipe string, includes a container having a closeable inlet for allowing a flow of liquid accompanied by sand thereinto. The container has a separate outlet assigned a suction side of a pump constituting the drive device for the apparatus. The drive device is kept going until a degree of filling of the container has been achieved. Between a separate inlet provided with a one-way valve and the separate outlet, a filter is disposed, so that sand remains in the container while the carrier liquid exits the container. In one embodiment, the drive device is a liquid-driven jet jump.

Abstract: A hydraulically-operated hoist is disclosed. The hoist includes a plurality of hydraulic piston/cylinder arrangements, each having an upper end. Two guide rails are disposed in parallel with the hydraulic piston/cylinder arrangements. A self-aligning yoke is connected between the upper ends of the hydraulic piston/cylinder arrangements and is raised and lowered along the two guide rails by the hydraulic piston/cylinder arrangements. The yoke comprises a beam with the two ends. An arm is connected to each end of the beam, extends obliquely upward from the beam, and terminates in a remote end rotatably connected to the upper ends of the hydraulic piston/cylinder arrangements. At least two sheaves are rotatably connected to the beam, each of which are capable of running its own wire line.

Abstract: An apparatus and method for collecting and retrieving liquid samples is disclosed. The sampling apparatus or bailer can reliably collect and retrieve liquid samples from a reservoir such as a liquid filled borehole. The sampling apparatus is mechanically simple, reliable, inexpensive to manufacture, and can optionally be discarded after one sampling operation thereby eliminating the time consuming and expensive step of cleaning the bailer prior to the next sampling operation. Furthermore, weighting is employed to assist in lowering the bailer into the reservoir of liquid to be sampled, wherein the weighting material is isolated from the interior sample chamber of the bailer in order to avoid contamination of the sample by the weighting material. The bailer can be easily emptied of sample liquid thereby minimizing operational costs associated with sampling activities.

Abstract: For production of hydrocarbons from a hydrocarbon formation through a well in a condition of fluctuations in the formation pressure, in addition to transformation of a formation fluid into a gas-liquid flow, the bottomhole pressure is automatically regulated at a level higher than saturation pressure of the formation fluid, regardless of any changes in properties of the formation and the formation fluid. At the same time, the speed of the flow of the formation fluid from the bottomhole to a location of transformation is maintained automatically at a level to be sufficient for the transformation of the formation fluid into the gas-liquid flow.

Abstract: Apparatus is disclosed for removing soil from a well, which is particularly adapted for use both in cleaning out sandy deposits in pre-existing wells and in boring new well shafts through sandy ground, or through alternating hard and soft soil layers. The apparatus comprises a substantially cylindrical, hollow reservoir body tapered at the bottom end to form a drainage spout and open at the upper end. The reservoir body is lowered into the well liner toward the bottom of the well. A jet of water is introduced through a passageway in the reservoir to create a slurry wave which causes previously loosened soil inside the well liner to rise and overflow into the reservoir body, whereby the soil may then be removed from the well.

Abstract: The invention discloses an apparatus for storing one or more constituents in a downhole tool. The constituents are segregated from each other until such time as the tool is actuated. At that time, the constituents are forced from their storage position and mixed as they are pushed from their storage position. The resultant mix is then directed to the location where the mixture will finally be placed for eventual solidification. The apparatus and method are useful for inflation of bridge plugs or external casing packers, as well as other downhole applications. Significant time is provided for the surface operator prior to initiation of the constituent elements by segregating the ingredients until shortly before they are mixed and directed to their final destination. Should a problem arise prior to mixing, the unmixed ingredients can be withdrawn from the wellbore.

Abstract: The present invention is a sample tank for storing and transporting a fluid sample withdrawn from an earth formation by a formation fluid sampling tool. The sample tank includes a storage cylinder adapted to withstand high internal pressure. The storage cylinder is selectively hydraulically connected to the sampling tool for conducting the fluid sample into the storage cylinder. A fusible metal substantially surrounds the storage cylinder. The fusible metal has a melting temperature not more than the temperature of the fluid sample, so that solidification of the fusible metal maintains the fluid sample substantially at the melting temperature of the fusible metal during solidification of the fusible metal as the tool is withdrawn from the wellbore and cooled. The fusible metal is surrounded by an outer housing which contains the fusible metal when it is in a liquid state.

Abstract: An apparatus for supporting instrumentation in a drill collar in a well, such instrumentation being subject to travel in the well to and from the drill collar comprising instrumentation having upper and lower end portions and being elongated between the end portions; there being tongue and groove interfit elements to suspend the instrumentation at the drill collar; one of the elements carried by the drill collar, and the other of the elements carried by the upper portion of the instrumentation, whereby the elements interfit as the instrumentation is traveled downwardly in the drill collar with the instrumentation lower portion hanging freely below the level of the elements.

Abstract: A discrete groundwater sampler specifically designed to obtain a low-turbidity groundwater sample directly into the sample transport container, with minimal or no loss of dissolved volatile organic contaminants and no oxidation of dissolved inorganic contaminants, dissolved metals, or dissolved polychlorobiphenyls. The sampler relies on a differential in head-pressure between the fill and exhaust port tubes and an increased sampler can volume to allow overfill of the sample container, causing a flushing of the sample transport container a number of times before the actual sample to be analyzed is actually obtained in the sample transport container. Further, the sampler relies on pressure equilibrium to start and maintain flow through the fill tube; if pressure equilibrium is disturbed or not reached, filling is delayed until the sampler reaches an equilibrium point, usually by lowering it to the desired sampling depth.

Abstract: A wireline set baffle for positioning in a well casing after the well casing has already been placed in a wellbore. The apparatus comprises a baffle and a setting or running tool engaged with the baffle and adapted for positioning the baffle at a predetermined location in the wellbore. In one embodiment, a lock ring may be used to lock the baffle to the casing at a predetermined location, and in another embodiment, collet fingers on the baffle may be used to engage the casing. The lock ring may be initially held in a non-engaging position by a lock ring retainer or shear pins. The collet fingers may be initially held in a non-engaging position by a cover which is disengaged from the collet fingers by a blasting cap. Engagement may be with an inner surface of the casing or a recess defined at a casing joint. A method of using the wireline set baffle is also disclosed.

Abstract: A spill preventing device for use on a tubular portion of a well head is provided. The device has at least two sections forming an open-topped container with a bottom, the container being of a size to receive spills around the well. The container sections have a central opening in the bottom of the container of a size to fit around a tubular portion of a well head. An upstanding centrally located cylindrical flange is provided to fit around the tubular member. The flange is formed with upwardly extending walls from the container sections, which are releasably connected together to form the flange. A splash suppression assembly is positioned in the open-topped container to prevent liquid from splashing out. The splash suppression assembly has a plurality of rings mounted above the bottom of the container. The rings are concentrically positioned about the central cylindrical flange.

Abstract: The present disclosure is directed to an apparatus which can be installed for opening and closing fluid flow production from a formation penetrated by a cased well borehole and connected therewith through perforations. The production tubing string is installed with a moveable sleeve having a closed and open position. The moveable sleeve defines a controllable pathway into the production tubing string. In conjunction with that, there is an internal receptacle formed in the production tubing string to enable landing of a sonde there at. The sonde connects firmly at the receptacle. Similarly, the moveable sleeve in the production tubing string has a receptacle it in which enables unique landing of a latching mechanism, the latching mechanism extending along the axis of the production tubing string at the urging of a motor in said sonde. The motor operates an elongate extendible member to move the sleeve from the closed to the open position and back.

Abstract: A groundwater sampler is disclosed which is adapted for reuse at multiple depths during a single boring, which is simple in design, which may be built with but a small number of parts, which is easy to used which is easy to decontaminate, and which is resistant to clogging from silts and fine sands.

Abstract: A sampling tool for immersion into a well for collection of samples of oil, gas or water during drilling for production includes a tubular, hollow and preferably cylindrical member with two chambers separated by a compressible pipe. An outer pipe is formed as a cylindrical member to withstand a reservoir pressure. Inside the outer pipe is positioned a unit forming a gas tight storage chamber for the gas-/liquid samples and a chamber for a counter pressure medium. The pipe is pressed against the inside of a U-profile. During sampling, the volume of the storage chamber will increase and the volume of the other chamber will be reduced corresponding to the increase of the storage chamber. Total separation of the gas-/liquid sample from the counter pressure medium is obtained by applying a diffusion tight flexible pipe, and the gas-/light sample analyzed will thus be representative of the reservoir gas-/liquid sampled.

Abstract: A device for providing fluid cross over in a milling operation is set forth. It is particularly used by connection to a pipe string which supports the milling device for cutting junk from a well. It features an elongate hollow tool body having a central portion which defines a trash receiving chamber. There is a pipe inserted into this chamber from below for introducing return fluid after cutting which is laden with metal shavings, chips, and trash. In this chamber, fluid flows upwardly through the pipe, and trash collects in the chamber by surrounding the pipe falling to the bottom of the chamber by weight. The chamber is limited at the top end by transverse wall which has a number of perforations having an aggregate cross sectional area to prevent fluid flow restriction.

Abstract: A drilling fluid additive sweep cartridge and method. The cartridge contains additives and the cartridge introduces those additives at the tool joint of the next drill pipe used which is positioned in the mouse hole. A modified sweep cartridge introduces the additive in the kelly pipe. Sealing disks in the form of neoprene blowout seals are used to hold the additive inside the sweep cartridge until the seals are partly ruptured by line water pressure. The sweep cartridge is retained inside the tool joint or the kelly pipe by retainers of various designs.

Abstract: In order to take a practically unlimited number of fluid samples, in particular from a well in production, a sonde is used including as many modular sampling devices (10) as there are samples to be taken. These devices (10) are disposed end-to-end and they are actuated in succession by a central control rod (66 ) driven back-and-forth by an actuator device situated at the top end of the sonde. A bottom end piece puts the bottom sampling device into a ready position in which it is ready to be actuated by raising the rod (66). By taking a sample in this way, the bottom sampling device also serves to put the adjacent sampling device into its ready position, and so on all the way up to the topmost sampling device.

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: Treatment fluid is injected into the production fluid of a well from a bladder contained in a canister at the bottom portion of the well bore. The flow rate is predetermined through use of a capillary tube connecting the bladder and an injection outlet. Differential pressure between the bladder and the outlet to actuate the flow of treatment fluid is created either by restricting the flow of production fluid adjacent the outlet or by compressing the bladder through the use of water-expansible material in contact with the bladder in the canister. An aperture in the bottom of the canister is provided to expose the bladder to the well fluid.

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: Treatment composition is released into a well by lowering a container filled with the composition to the bottom of the well. The corrosive well fluid dissolves the composition through the open upper end of the container and corrodes away the walls of the container from the inside out. The outer surface of the container walls is coated with a material, such as tetrafluoroethylene, which acts as a barrier to the well fluid to prevent it from directly contacting the outer wall surface. In this manner treatment composition is gradually released from the top end of the ever-diminishing length of container and the container is degraded in the well.

Abstract: The invention relates to a tool suitable for closing a production column (100) of a well when the tool is located in a connector of enlarged diameter (101). The tool is lowered on the end of a cable (76) and includes a tilting valve member (60) which is oblong in shape and which is oriented longitudinally to pass through the corresponding oblong orifice of a valve seat (69) fixed to the connector, and is then oriented transversely in order to co-operate with said seat in order to close the production column when a traction force (F) is applied to the cable (76).

Abstract: An apparatus for setting a bottom tool comprising a valve body having its lower end portion connected to a bottom tool and an upper end portion connected to a source of fluid under pressure, an elongated bore within the valve body, a valve member slidable within the bore and having a piston exposed to the fluid under pressure movable from a first position whereby the application of the fluid under predetermined pressure imparts longitudinal movement to the valve member to a second position whereby the valve member transmits the force of the fluid under pressure to the bottom tool, seals provided on said piston for preventing the fluid exerting pressure against said piston from flowing through the bore of said valve, and a packing medium provided in the bore intermediate the piston and the lower end portion of the valve body.

Abstract: A downhole tool is actuated at chosen well depth by selection of a control element that melts at the chosen depth well temperature. In one form of tool, a fusible pin melts to release spring-loaded jaws which move against an expansion cone to anchor the tool in the well. In another form, a fusible receptacle cover melts to release a quantity of dense fluid under action of gravity. Suitable control elements are formed of bismuth, with lead and zinc.

Abstract: A well testing tool includes a housing adapted to be connected to a well test string and having a substantially open bore therethrough. A valve assembly is disposed in the housing and includes a spherical valve member having a substantially open valve bore therethrough and includes upper and lower annular seats engaging the spherical valve member. The valve member is rotatable within the seats between closed and open positions. An actuating assembly is engaged with the valve member for rotating the valve member between its open positions upon relative longitudinal movement between the actuating assembly and the spherical valve member. An upper load transfer mandrel is disposed between the upper seat and the housing for transferring any upward forces caused by upwardly directed pressure differentials across the spherical valve member to the housing by compressional loading of the upper load transfer mandrel.

Abstract: A liquid chemical, such as a corrosion inhibitor, is inserted into a producing well by pouring the chemical into an elongate carrier and then dropping the carrier into the well. The liquid chemical and the carrier are selected so that the carrier is dissolved by the chemical. The chemical is therefore delivered into the well toward the bottom thereof where it is desired to place the chemical.

Abstract: An annulus pressure responsive sampler valve comprising a power section and a sampler section having an annular sample chamber therein; the sampler valve having a full bore therethrough.

Abstract: Injector apparatus is disclosed which includes a sealed self-contained replaceable vessel containing an ejectable material to be injected into the well-bore during well logging operations. The vessel comprises a flexible-wall, collapsible tubular-like cartridge which can be removed from the mounting apparatus in the string of logging tools and replaced with a new cartridge. Motive force apparatus pressurizes the material in the cartridge and a valve device, which is actuated by a solenoid device, controls the flow of material exiting from the cartridge. Passageways and an orifice in the mounting apparatus directs the flow of material from the valve device to the well-bore.

Abstract: A junk basket for collecting junk from a well bore and adapted for external connection to a well drilling string. The junk basket includes an elongate body having an annular interior for a releasable attachment to the exterior of a portion of the drilling string. The body includes an upwardly directed cavity for receiving junk from the well bore and one or more drain holes through the body adjacent the bottom of the cavity for draining fluid. Ribs are provided in the cavity connected to the body for engaging the exterior of the drilling string for reinforcing the body and guide means, preferably positioned on the top of the ribs, extend upwardly for preventing the top of the body from catching on downwardly facing shoulders in the well bore.