186 results about "Oil well drilling" patented technology

Method for producing an hydrophobically associative polymer is provided which is characterized by forming a monomer solution comprising a surfactant, at least one hydrophobic ethylenically unsaturated monomer, at least one hydrophilic monomer selected from nonionic ethylenically monomers, cationic ethylenically unsaturated monomers, anionic ethylenically unsaturated monomers or mixtures thereof, and water; forming a salt solution comprising a multivalent salt and water; mixing the monomer solution and salt solution to form a mixed solution; and charging the mixed solution with an initiator, thereby polymerizing the monomers to form the hydrophobically associative polymer in a dispersion. Aqueous dispersion containing the hydrophobically associative polymer formed by the method. The aqueous dispersion containing the hydrophobically associative polymer may be used in a paint formulation, in a mobility control fluid useful in enhanced oil recovery, in a secondary or tertiary oil recovery system, in an enhanced oil recovery method, in a cementious composition, in an oil well drilling mud formulation, in a fracturing fluid formulation, in a wastewater treatment system, or in a dewatering sludge system.

A drop ball catcher apparatus for use with downhole tools in oil well drilling and installation operations. A drop ball catcher apparatus is used to receive and stow a drop ball ejected from a ball-actuated downhole tool.

According to an aspect a bulkhead assembly is provided having particular application with a downhole tool, in particular for oil well drilling applications. The bulkhead assembly includes a bulkhead body and an electrical contact component disposed within the bulkhead body, wherein at least a portion of the electrical contact component is configured to pivot about its own axis, without compromising its ability to provide a pressure and fluid barrier. In an embodiment, a ground apparatus is provided to provide an electrical connection for at least one ground wire. The ground apparatus may be positionable on the bulkhead body of the bulkhead assembly. In an aspect, a downhole tool including the bulkhead assembly and ground apparatus is also generally described.

A wireline drill train is used to drill an elongated, small diameter, lateral branch borehole from near the base of a main well. The drill train, includes a drill module, a first self-propelled thrust module coupled to the drill module, and a second self-propelled thrust module pivotally coupled to the first self-propelled thrust module. Each thrust module includes at least two extendible thrusters. Each extendible thruster includes a six-bar mechanism and a traction tread. The drill train further includes a first articulated linkage linking the first self-propelled thrust module to the drill module, and a second articulated linkage linking the second thrust module to the first thrust module. The second articulated linkage includes a thrust-transmission bar and three retractable stiffener bars. The method for drilling the curved transition region of the lateral branch borehole includes executing a series of alternating pivotal drilling steps and forward drilling steps to create a step-cut region of branch borehole having very small radius of curvature.

An aspect of the present invention is directed to an avalanche photodiode (APD) device for use in oil well drilling applications in harsh, down-hole environments where shock levels are near 250 gravitational acceleration (G) and/or temperatures approach or exceed 150° C. Another aspect of the present invention is directed to an APD device fabricated using SiC materials. Another aspect of the present invention is directed to an APD device fabricated using GaN materials. According to an embodiment of the present invention, an avalanche photodiode for detecting ultraviolet photons comprises a substrate having a first dopant; a first layer having the first dopant, positioned on top of the substrate; a second layer having a second dopant, positioned on top of the first layer; a third layer having a second dopant, positioned on top of the second layer; a passivation layer for providing electrical passivation on a surface of the avalanche photodiode; a phosphorous silicate glass layer for limiting mobile ion transport, positioned on top of the third layer; and a pair of metal electrodes for providing an ohmic contact wherein a first electrode is positioned below the substrate and a second electrode is positioned above the third layer; wherein the avalanche photodiode comprises a first sidewall and a second sidewall forming a sloped mesa shape; and wherein the avalanche photodiode operates in an environment comprising a temperature approximately equal to 150 degrees Celsius.

An X-ray fluorescence debris recording method of oil drilling geology is characterized in that: it contains the following steps: 1. sample from shallow to deep continuously on the drilling depth to get the debris samples of each drilling depth rock formation. 2. Clear the debris samples of each drilling depth rock formation on the drilling depth and dry these debris samples. 3. Grind the debris samples to powder and put them into the pressing die. Press the powder to print by using the tablemachine under the vacuum. 4. Test the component data of the print sequentially by using the energy dispersing-type X-ray fluorescence analyzer on the drilling depth. 5. The computer system makes the rock component data to the atlas on the drilling depth. Based on the analysis of the data and the atlas, the decision of the drilling lithologic characters and horizon is achieved. The distinct effects of this invention are: the cheap price, the low testing cost, the shorter analysis cyclic, the rock structure can be achieved simultaneously as the drilling speed.

An additive composition including a synergistic combination of a hectorite organoclay composition and an attapulgite organoclay composition. The hectorite organoclay composition includes (i) a first organic cation provided by an alkoxylated quaternary ammonium salt; and ii) a second organic cation wherein such second organic cation is not provided by an alkoxylated quaternary ammonium salt. The attapulgite organoclay composition includes (iii) a third organic cation provided by an alkoxylated quaternary ammonium salt; and (iv) a fourth organic cation wherein such third organic cation is not provided by an alkoxylated quaternary ammonium salt.

The invention relates to an ultra-short radius radial well-drilling tool system used for well drilling and completion operations in oil production and comprising a sleeve perforating system and a high-pressure ejection system. The ultra-short radius radial well-drilling tool system comprises a lifting joint, an elbow joint, an upper joint, a rotating joint, a thrust ball bearing, a single-row centripetal ball bearing, a base, a central tube, a sucker rod, an oil pipe, a screw rod, a high-pressure hose, an upper fixed joint, an upper joint of a universal joint, a rail groove, a universal joint, a shaft pin, a cruciform joint, a drill plate, a drilling tool joint, a drilling tool, a lower joint, a high-pressure nozzle and a locating anchor. The high-pressure ejection system comprises a ground high-pressure pump, the sucker rod, the high-pressure hose, the rail groove and the locating anchor. Firstly, the sleeve perforating system is used for drilling a hole with the diameter being not less than 25 mm in the wall of a sleeve at the design depth of an oil well; a pipe post of the sucker rod and a perforating cutter are brought out, connected with the high-pressure ejection system and taken into the well; and the high-pressure hose takes the high-pressure nozzle into the hole through the rail groove for high-pressure ejection. The well drilling system solves the problem that old wells increase oil draining area, and can be widely applied to oil well drilling and completion operations.

An anti-stall tool in an oil well drilling assembly that controls reciprocation of the drill bit by controller that alters weight-on-bit (WOB) depending upon measured downhole pressure or torque. The downhole controller keeps the drill bit rotating by maintaining WOB during normal drilling operations, increasing WOB if sensed working pressure indicates that drill bit loading or torque is undesirably low, and reversing WOB by applying a spring force for retracting the drill bit if excessive working pressure or torque is sensed.

Fluids useful in oil well drilling operations are described. The fluids comprise standard viscosifying and fluid loss control additives along with phosphonates or phosphate esters of organic ligands. The addition of the phosphonates or phosphate esters at effective concentrations prevents the adherence of heavy oil and heavy oil laden drill cuttings to drill pipe strings and well bore casings.

A method of treating contaminated water effluent from a well drilling operation. The method comprises decomposing organic contaminants in the effluent by bubbling a gas containing ozone through the effluent; adding a coagulant to increase the particle size of solid particles contained in the effluent; adding a flocculant to increase the particle size of solid particles contained in the effluent, thereby forming flocs suspended in the effluent; and filtering the flocs from the effluent to produce a filtrate and flocculated solids. The method may further comprise adding the coagulant into a stream of effluent flowing within a first conduit under controlled shear conditions, and adding the flocculant into a stream of effluent containing pin flocs flowing within a second conduit under controlled shear conditions. The method may further comprise delivering the effluent containing the suspended flocs into a filter through a conduit floating in the effluent contained in the filter.

A completion and workover fluid composition comprising, water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group consisting of inorganic salts, shale inhibitors, corrosion inhibitor, biocide, defoamers and finely divided solids particles (e.g., bentonite, attapulgite, sepiolite, calcium carbonate, etc.), depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent is an ethoxylated raw cotton linters or a modified ethoxylated raw cotton linters. The ethoxylated raw cotton linters provides comparable or better rheology and viscosity properties compared to high molecular weight commercial HECs made from purified cotton linters. These ethoxylated raw cotton linters derivatives are suitable for applications in oil-well servicing fluids, particularly to enhance functional properties of completion and workover fluids used during oil-well drilling operations.

The invention relates to the technical field of well drilling liquid production methods of oil well drilling engineering and relates to a bio-oil lubricant for drilling wells and a preparation method of the bio-oil lubricant. The bio-oil lubricant comprises the following components of, by weight, 100 parts of base oil and 1-15 parts of surface active agents. The preparation method of the bio-oil lubricant includes adding the base oil and the surface active agents with required quantities to a reactor, stirring the mixture for reaction at the temperature of 30-90 DEG C for 2-5 hours, and cooling the mixture after the reaction is finished to obtain the bio-oil lubricant. The prepared bio-oil lubricant is high in lubrication capacity, stable in performance at the high temperature of 120 DEG C, good in liquidity at low temperatures, non-toxic, easy to degrade biologically, small in influence on environment and environment-friendly; and the bio-oil lubricant is capable of meeting requirements of exploration wells, high inclination and extended reach wells and offshore drilling wells, effectively reducing sticking accidents and reducing comprehensive costs of well drilling engineering.

An aspect of the present invention is directed to a system for use in oil well drilling applications. The system includes a scintillator material having a cubic garnet host and praseodymium distributed within the host. The scintillator material emits ultraviolet radiation in response to stimulating gamma ray radiation. A radiation detector optically coupled to the scintillator detects the emitted ultraviolet radiation. Another aspect of the invention is a method for detecting oil. A radiation detector is optically coupled to a scintillator material having a cubic garnet host and praseodymium distributed within the host, wherein the praseodymium acts as an activator, and wherein the scintillator material emits ultraviolet radiation in response to stimulating gamma ray radiation. The detector and the scintillator material are lowered below the surface of the earth, and ultraviolet radiation emitted by the scintillator material in response to stimulating gamma ray radiation reflected by hydrogen bearing compounds indicating the presence of oil is detected by the detector.

An anti-stall tool in an oil well drilling assembly that controls reciprocation of the drill bit by a controller that alters weight-on-bit (WOB) depending upon measured downhole pressure or torque at the downhole motor. The controller receives preset high and low working pressure limits for the downhole motor and keeps the drill bit rotating by maintaining WOB during normal drilling operations, increasing WOB if sensed working pressure indicates that drill bit loading or torque is undesirably low, and reversing WOB by retracting the drill bit if excessive working pressure or torque is sensed.

This invention discloses a process for producing highly substituted polyanionic cellulose. The method comprises: (1) adding natural cellulose into ethanol solution of NaOH in a kneading machine, alkalizing for 60 min, adding ethanol solution of chloroacetic acid, stirring, heating to 75-80 deg.C, and keeping the temperature for 60 min for etherisation; (2) cooling to below 35 deg.C, adding 50% NaOH solution, stirring uniformly, alkalizing for 60 min, adding ethanol solution of chloroacetic acid, stirring, heating to 75-80 deg.C, and keeping the temperature for 60 min for etherisation; (3) neutralizing, washing for twice, centrifuging to remove water and alcohol, drying, and pulverizing to obtain the product. The polyanionic cellulose has such advantages as high substitution degree, uniform substituent distribution, high resistance to heat, salt and corrosion, and low water loss, and can be used in the fields of oil well drilling, textile dyeing and food industry.